1 | /*
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2 | ** string.c - String class
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3 | **
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4 | ** See Copyright Notice in mruby.h
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5 | */
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6 |
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7 | #ifdef _MSC_VER
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8 | # define _CRT_NONSTDC_NO_DEPRECATE
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9 | #endif
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10 |
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11 | #ifndef MRB_WITHOUT_FLOAT
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12 | #include <float.h>
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13 | #include <math.h>
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14 | #endif
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15 | #include <limits.h>
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16 | #include <stddef.h>
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17 | #include <stdlib.h>
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18 | #include <string.h>
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19 | #include <mruby.h>
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20 | #include <mruby/array.h>
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21 | #include <mruby/class.h>
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22 | #include <mruby/range.h>
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23 | #include <mruby/string.h>
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24 | #include <mruby/numeric.h>
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25 |
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26 | typedef struct mrb_shared_string {
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27 | int refcnt;
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28 | mrb_ssize capa;
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29 | char *ptr;
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30 | } mrb_shared_string;
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31 |
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32 | const char mrb_digitmap[] = "0123456789abcdefghijklmnopqrstuvwxyz";
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33 |
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34 | #define mrb_obj_alloc_string(mrb) ((struct RString*)mrb_obj_alloc((mrb), MRB_TT_STRING, (mrb)->string_class))
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35 |
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36 | static struct RString*
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37 | str_init_normal_capa(mrb_state *mrb, struct RString *s,
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38 | const char *p, size_t len, size_t capa)
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39 | {
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40 | char *dst = (char *)mrb_malloc(mrb, capa + 1);
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41 | if (p) memcpy(dst, p, len);
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42 | dst[len] = '\0';
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43 | s->as.heap.ptr = dst;
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44 | s->as.heap.len = (mrb_ssize)len;
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45 | s->as.heap.aux.capa = (mrb_ssize)capa;
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46 | RSTR_UNSET_TYPE_FLAG(s);
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47 | return s;
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48 | }
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49 |
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50 | static struct RString*
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51 | str_init_normal(mrb_state *mrb, struct RString *s, const char *p, size_t len)
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52 | {
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53 | return str_init_normal_capa(mrb, s, p, len, len);
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54 | }
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55 |
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56 | static struct RString*
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57 | str_init_embed(struct RString *s, const char *p, size_t len)
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58 | {
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59 | if (p) memcpy(RSTR_EMBED_PTR(s), p, len);
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60 | RSTR_EMBED_PTR(s)[len] = '\0';
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61 | RSTR_SET_TYPE_FLAG(s, EMBED);
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62 | RSTR_SET_EMBED_LEN(s, len);
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63 | return s;
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64 | }
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65 |
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66 | static struct RString*
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67 | str_init_nofree(struct RString *s, const char *p, size_t len)
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68 | {
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69 | s->as.heap.ptr = (char *)p;
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70 | s->as.heap.len = (mrb_ssize)len;
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71 | s->as.heap.aux.capa = 0; /* nofree */
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72 | RSTR_SET_TYPE_FLAG(s, NOFREE);
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73 | return s;
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74 | }
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75 |
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76 | static struct RString*
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77 | str_init_shared(mrb_state *mrb, const struct RString *orig, struct RString *s, mrb_shared_string *shared)
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78 | {
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79 | if (shared) {
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80 | shared->refcnt++;
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81 | }
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82 | else {
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83 | shared = (mrb_shared_string *)mrb_malloc(mrb, sizeof(mrb_shared_string));
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84 | shared->refcnt = 1;
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85 | shared->ptr = orig->as.heap.ptr;
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86 | shared->capa = orig->as.heap.aux.capa;
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87 | }
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88 | s->as.heap.ptr = orig->as.heap.ptr;
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89 | s->as.heap.len = orig->as.heap.len;
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90 | s->as.heap.aux.shared = shared;
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91 | RSTR_SET_TYPE_FLAG(s, SHARED);
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92 | return s;
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93 | }
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94 |
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95 | static struct RString*
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96 | str_init_fshared(const struct RString *orig, struct RString *s, struct RString *fshared)
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97 | {
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98 | s->as.heap.ptr = orig->as.heap.ptr;
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99 | s->as.heap.len = orig->as.heap.len;
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100 | s->as.heap.aux.fshared = fshared;
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101 | RSTR_SET_TYPE_FLAG(s, FSHARED);
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102 | return s;
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103 | }
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104 |
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105 | static struct RString*
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106 | str_init_modifiable(mrb_state *mrb, struct RString *s, const char *p, size_t len)
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107 | {
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108 | if (RSTR_EMBEDDABLE_P(len)) {
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109 | return str_init_embed(s, p, len);
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110 | }
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111 | else {
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112 | return str_init_normal(mrb, s, p, len);
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113 | }
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114 | }
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115 |
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116 | static struct RString*
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117 | str_new_static(mrb_state *mrb, const char *p, size_t len)
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118 | {
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119 | if (RSTR_EMBEDDABLE_P(len)) {
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120 | return str_init_embed(mrb_obj_alloc_string(mrb), p, len);
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121 | }
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122 | if (len >= MRB_SSIZE_MAX) {
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123 | mrb_raise(mrb, E_ARGUMENT_ERROR, "string size too big");
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124 | }
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125 | return str_init_nofree(mrb_obj_alloc_string(mrb), p, len);
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126 | }
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127 |
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128 | static struct RString*
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129 | str_new(mrb_state *mrb, const char *p, size_t len)
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130 | {
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131 | if (RSTR_EMBEDDABLE_P(len)) {
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132 | return str_init_embed(mrb_obj_alloc_string(mrb), p, len);
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133 | }
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134 | if (len >= MRB_SSIZE_MAX) {
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135 | mrb_raise(mrb, E_ARGUMENT_ERROR, "string size too big");
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136 | }
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137 | if (p && mrb_ro_data_p(p)) {
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138 | return str_init_nofree(mrb_obj_alloc_string(mrb), p, len);
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139 | }
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140 | return str_init_normal(mrb, mrb_obj_alloc_string(mrb), p, len);
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141 | }
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142 |
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143 | static inline void
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144 | str_with_class(struct RString *s, mrb_value obj)
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145 | {
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146 | s->c = mrb_str_ptr(obj)->c;
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147 | }
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148 |
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149 | static mrb_value
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150 | mrb_str_new_empty(mrb_state *mrb, mrb_value str)
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151 | {
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152 | struct RString *s = str_new(mrb, 0, 0);
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153 |
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154 | str_with_class(s, str);
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155 | return mrb_obj_value(s);
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156 | }
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157 |
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158 | MRB_API mrb_value
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159 | mrb_str_new_capa(mrb_state *mrb, size_t capa)
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160 | {
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161 | struct RString *s;
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162 |
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163 | if (RSTR_EMBEDDABLE_P(capa)) {
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164 | s = str_init_embed(mrb_obj_alloc_string(mrb), NULL, 0);
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165 | }
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166 | else if (capa >= MRB_SSIZE_MAX) {
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167 | mrb_raise(mrb, E_ARGUMENT_ERROR, "string capacity size too big");
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168 | /* not reached */
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169 | s = NULL;
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170 | }
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171 | else {
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172 | s = str_init_normal_capa(mrb, mrb_obj_alloc_string(mrb), NULL, 0, capa);
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173 | }
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174 |
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175 | return mrb_obj_value(s);
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176 | }
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177 |
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178 | #ifndef MRB_STR_BUF_MIN_SIZE
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179 | # define MRB_STR_BUF_MIN_SIZE 128
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180 | #endif
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181 |
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182 | MRB_API mrb_value
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183 | mrb_str_buf_new(mrb_state *mrb, size_t capa)
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184 | {
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185 | if (capa < MRB_STR_BUF_MIN_SIZE) {
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186 | capa = MRB_STR_BUF_MIN_SIZE;
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187 | }
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188 | return mrb_str_new_capa(mrb, capa);
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189 | }
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190 |
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191 | static void
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192 | resize_capa(mrb_state *mrb, struct RString *s, size_t capacity)
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193 | {
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194 | #if SIZE_MAX > MRB_SSIZE_MAX
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195 | mrb_assert(capacity < MRB_SSIZE_MAX);
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196 | #endif
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197 | if (RSTR_EMBED_P(s)) {
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198 | if (!RSTR_EMBEDDABLE_P(capacity)) {
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199 | str_init_normal_capa(mrb, s, RSTR_EMBED_PTR(s), RSTR_EMBED_LEN(s), capacity);
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200 | }
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201 | }
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202 | else {
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203 | s->as.heap.ptr = (char*)mrb_realloc(mrb, RSTR_PTR(s), capacity+1);
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204 | s->as.heap.aux.capa = (mrb_ssize)capacity;
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205 | }
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206 | }
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207 |
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208 | MRB_API mrb_value
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209 | mrb_str_new(mrb_state *mrb, const char *p, size_t len)
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210 | {
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211 | return mrb_obj_value(str_new(mrb, p, len));
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212 | }
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213 |
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214 | MRB_API mrb_value
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215 | mrb_str_new_cstr(mrb_state *mrb, const char *p)
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216 | {
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217 | struct RString *s;
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218 | size_t len;
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219 |
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220 | if (p) {
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221 | len = strlen(p);
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222 | }
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223 | else {
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224 | len = 0;
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225 | }
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226 |
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227 | s = str_new(mrb, p, len);
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228 |
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229 | return mrb_obj_value(s);
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230 | }
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231 |
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232 | MRB_API mrb_value
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233 | mrb_str_new_static(mrb_state *mrb, const char *p, size_t len)
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234 | {
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235 | struct RString *s = str_new_static(mrb, p, len);
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236 | return mrb_obj_value(s);
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237 | }
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238 |
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239 | static void
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240 | str_decref(mrb_state *mrb, mrb_shared_string *shared)
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241 | {
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242 | shared->refcnt--;
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243 | if (shared->refcnt == 0) {
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244 | mrb_free(mrb, shared->ptr);
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245 | mrb_free(mrb, shared);
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246 | }
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247 | }
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248 |
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249 | static void
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250 | str_modify_keep_ascii(mrb_state *mrb, struct RString *s)
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251 | {
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252 | if (RSTR_SHARED_P(s)) {
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253 | mrb_shared_string *shared = s->as.heap.aux.shared;
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254 |
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255 | if (shared->refcnt == 1 && s->as.heap.ptr == shared->ptr) {
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256 | s->as.heap.aux.capa = shared->capa;
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257 | s->as.heap.ptr[s->as.heap.len] = '\0';
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258 | RSTR_UNSET_SHARED_FLAG(s);
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259 | mrb_free(mrb, shared);
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260 | }
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261 | else {
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262 | str_init_modifiable(mrb, s, s->as.heap.ptr, (size_t)s->as.heap.len);
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263 | str_decref(mrb, shared);
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264 | }
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265 | }
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266 | else if (RSTR_NOFREE_P(s) || RSTR_FSHARED_P(s)) {
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267 | str_init_modifiable(mrb, s, s->as.heap.ptr, (size_t)s->as.heap.len);
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268 | }
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269 | }
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270 |
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271 | static void
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272 | check_null_byte(mrb_state *mrb, mrb_value str)
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273 | {
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274 | mrb_to_str(mrb, str);
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275 | if (memchr(RSTRING_PTR(str), '\0', RSTRING_LEN(str))) {
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276 | mrb_raise(mrb, E_ARGUMENT_ERROR, "string contains null byte");
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277 | }
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278 | }
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279 |
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280 | void
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281 | mrb_gc_free_str(mrb_state *mrb, struct RString *str)
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282 | {
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283 | if (RSTR_EMBED_P(str))
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284 | /* no code */;
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285 | else if (RSTR_SHARED_P(str))
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286 | str_decref(mrb, str->as.heap.aux.shared);
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287 | else if (!RSTR_NOFREE_P(str) && !RSTR_FSHARED_P(str))
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288 | mrb_free(mrb, str->as.heap.ptr);
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289 | }
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290 |
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291 | #ifdef MRB_UTF8_STRING
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292 | static const char utf8len_codepage[256] =
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293 | {
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294 | 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
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295 | 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
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296 | 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
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297 | 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
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298 | 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
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299 | 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
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300 | 2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,
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301 | 3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,4,4,4,4,4,1,1,1,1,1,1,1,1,1,1,1,
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302 | };
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303 |
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304 | mrb_int
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305 | mrb_utf8len(const char* p, const char* e)
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306 | {
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307 | mrb_int len;
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308 | mrb_int i;
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309 |
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310 | if ((unsigned char)*p < 0x80) return 1;
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311 | len = utf8len_codepage[(unsigned char)*p];
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312 | if (len == 1) return 1;
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313 | if (len > e - p) return 1;
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314 | for (i = 1; i < len; ++i)
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315 | if ((p[i] & 0xc0) != 0x80)
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316 | return 1;
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317 | return len;
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318 | }
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319 |
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320 | mrb_int
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321 | mrb_utf8_strlen(const char *str, mrb_int byte_len)
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322 | {
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323 | mrb_int total = 0;
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324 | const char *p = str;
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325 | const char *e = p + byte_len;
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326 |
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327 | while (p < e) {
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328 | p += mrb_utf8len(p, e);
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329 | total++;
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330 | }
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331 | return total;
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332 | }
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333 |
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334 | static mrb_int
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335 | utf8_strlen(mrb_value str)
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336 | {
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337 | struct RString *s = mrb_str_ptr(str);
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338 | mrb_int byte_len = RSTR_LEN(s);
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339 |
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340 | if (RSTR_ASCII_P(s)) {
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341 | return byte_len;
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342 | }
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343 | else {
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344 | mrb_int utf8_len = mrb_utf8_strlen(RSTR_PTR(s), byte_len);
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345 | if (byte_len == utf8_len) RSTR_SET_ASCII_FLAG(s);
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346 | return utf8_len;
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347 | }
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348 | }
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349 |
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350 | #define RSTRING_CHAR_LEN(s) utf8_strlen(s)
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351 |
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352 | /* map character index to byte offset index */
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353 | static mrb_int
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354 | chars2bytes(mrb_value s, mrb_int off, mrb_int idx)
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355 | {
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356 | if (RSTR_ASCII_P(mrb_str_ptr(s))) {
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357 | return idx;
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358 | }
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359 | else {
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360 | mrb_int i, b, n;
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361 | const char *p = RSTRING_PTR(s) + off;
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362 | const char *e = RSTRING_END(s);
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363 |
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364 | for (b=i=0; p<e && i<idx; i++) {
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365 | n = mrb_utf8len(p, e);
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366 | b += n;
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367 | p += n;
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368 | }
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369 | return b;
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370 | }
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371 | }
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372 |
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373 | /* map byte offset to character index */
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374 | static mrb_int
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375 | bytes2chars(char *p, mrb_int len, mrb_int bi)
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376 | {
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377 | const char *e = p + (size_t)len;
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378 | const char *pivot = p + bi;
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379 | mrb_int i;
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380 |
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381 | for (i = 0; p < pivot; i ++) {
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382 | p += mrb_utf8len(p, e);
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383 | }
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384 | if (p != pivot) return -1;
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385 | return i;
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386 | }
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387 |
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388 | static const char *
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389 | char_adjust(const char *beg, const char *end, const char *ptr)
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390 | {
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391 | if ((ptr > beg || ptr < end) && (*ptr & 0xc0) == 0x80) {
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392 | const int utf8_adjust_max = 3;
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393 | const char *p;
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394 |
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395 | if (ptr - beg > utf8_adjust_max) {
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396 | beg = ptr - utf8_adjust_max;
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397 | }
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398 |
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399 | p = ptr;
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400 | while (p > beg) {
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401 | p --;
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402 | if ((*p & 0xc0) != 0x80) {
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403 | int clen = mrb_utf8len(p, end);
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404 | if (clen > ptr - p) return p;
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405 | break;
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406 | }
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407 | }
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408 | }
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409 |
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410 | return ptr;
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411 | }
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412 |
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413 | static const char *
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414 | char_backtrack(const char *ptr, const char *end)
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415 | {
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416 | if (ptr < end) {
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417 | const int utf8_bytelen_max = 4;
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418 | const char *p;
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419 |
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420 | if (end - ptr > utf8_bytelen_max) {
|
---|
421 | ptr = end - utf8_bytelen_max;
|
---|
422 | }
|
---|
423 |
|
---|
424 | p = end;
|
---|
425 | while (p > ptr) {
|
---|
426 | p --;
|
---|
427 | if ((*p & 0xc0) != 0x80) {
|
---|
428 | int clen = utf8len_codepage[(unsigned char)*p];
|
---|
429 | if (clen == end - p) { return p; }
|
---|
430 | break;
|
---|
431 | }
|
---|
432 | }
|
---|
433 | }
|
---|
434 |
|
---|
435 | return end - 1;
|
---|
436 | }
|
---|
437 |
|
---|
438 | static mrb_int
|
---|
439 | str_index_str_by_char_search(mrb_state *mrb, const char *p, const char *pend, const char *s, const mrb_int slen, mrb_int off)
|
---|
440 | {
|
---|
441 | /* Based on Quick Search algorithm (Boyer-Moore-Horspool algorithm) */
|
---|
442 |
|
---|
443 | ptrdiff_t qstable[1 << CHAR_BIT];
|
---|
444 |
|
---|
445 | /* Preprocessing */
|
---|
446 | {
|
---|
447 | mrb_int i;
|
---|
448 |
|
---|
449 | for (i = 0; i < 1 << CHAR_BIT; i ++) {
|
---|
450 | qstable[i] = slen;
|
---|
451 | }
|
---|
452 | for (i = 0; i < slen; i ++) {
|
---|
453 | qstable[(unsigned char)s[i]] = slen - (i + 1);
|
---|
454 | }
|
---|
455 | }
|
---|
456 |
|
---|
457 | /* Searching */
|
---|
458 | while (p < pend && pend - p >= slen) {
|
---|
459 | const char *pivot;
|
---|
460 |
|
---|
461 | if (memcmp(p, s, slen) == 0) {
|
---|
462 | return off;
|
---|
463 | }
|
---|
464 |
|
---|
465 | pivot = p + qstable[(unsigned char)p[slen - 1]];
|
---|
466 | if (pivot >= pend || pivot < p /* overflowed */) { return -1; }
|
---|
467 |
|
---|
468 | do {
|
---|
469 | p += mrb_utf8len(p, pend);
|
---|
470 | off ++;
|
---|
471 | } while (p < pivot);
|
---|
472 | }
|
---|
473 |
|
---|
474 | return -1;
|
---|
475 | }
|
---|
476 |
|
---|
477 | static mrb_int
|
---|
478 | str_index_str_by_char(mrb_state *mrb, mrb_value str, mrb_value sub, mrb_int pos)
|
---|
479 | {
|
---|
480 | const char *p = RSTRING_PTR(str);
|
---|
481 | const char *pend = p + RSTRING_LEN(str);
|
---|
482 | const char *s = RSTRING_PTR(sub);
|
---|
483 | const mrb_int slen = RSTRING_LEN(sub);
|
---|
484 | mrb_int off = pos;
|
---|
485 |
|
---|
486 | for (; pos > 0; pos --) {
|
---|
487 | if (pend - p < 1) { return -1; }
|
---|
488 | p += mrb_utf8len(p, pend);
|
---|
489 | }
|
---|
490 |
|
---|
491 | if (slen < 1) { return off; }
|
---|
492 |
|
---|
493 | return str_index_str_by_char_search(mrb, p, pend, s, slen, off);
|
---|
494 | }
|
---|
495 |
|
---|
496 | #define BYTES_ALIGN_CHECK(pos) if (pos < 0) return mrb_nil_value();
|
---|
497 | #else
|
---|
498 | #define RSTRING_CHAR_LEN(s) RSTRING_LEN(s)
|
---|
499 | #define chars2bytes(p, off, ci) (ci)
|
---|
500 | #define bytes2chars(p, end, bi) (bi)
|
---|
501 | #define char_adjust(beg, end, ptr) (ptr)
|
---|
502 | #define char_backtrack(ptr, end) ((end) - 1)
|
---|
503 | #define BYTES_ALIGN_CHECK(pos)
|
---|
504 | #define str_index_str_by_char(mrb, str, sub, pos) str_index_str(mrb, str, sub, pos)
|
---|
505 | #endif
|
---|
506 |
|
---|
507 | #ifndef MRB_QS_SHORT_STRING_LENGTH
|
---|
508 | #define MRB_QS_SHORT_STRING_LENGTH 2048
|
---|
509 | #endif
|
---|
510 |
|
---|
511 | static inline mrb_int
|
---|
512 | mrb_memsearch_qs(const unsigned char *xs, mrb_int m, const unsigned char *ys, mrb_int n)
|
---|
513 | {
|
---|
514 | if (n + m < MRB_QS_SHORT_STRING_LENGTH) {
|
---|
515 | const unsigned char *y = ys;
|
---|
516 | const unsigned char *ye = ys+n-m+1;
|
---|
517 |
|
---|
518 | for (;;) {
|
---|
519 | y = (const unsigned char*)memchr(y, xs[0], (size_t)(ye-y));
|
---|
520 | if (y == NULL) return -1;
|
---|
521 | if (memcmp(xs, y, m) == 0) {
|
---|
522 | return (mrb_int)(y - ys);
|
---|
523 | }
|
---|
524 | y++;
|
---|
525 | }
|
---|
526 | return -1;
|
---|
527 | }
|
---|
528 | else {
|
---|
529 | const unsigned char *x = xs, *xe = xs + m;
|
---|
530 | const unsigned char *y = ys;
|
---|
531 | int i;
|
---|
532 | ptrdiff_t qstable[256];
|
---|
533 |
|
---|
534 | /* Preprocessing */
|
---|
535 | for (i = 0; i < 256; ++i)
|
---|
536 | qstable[i] = m + 1;
|
---|
537 | for (; x < xe; ++x)
|
---|
538 | qstable[*x] = xe - x;
|
---|
539 | /* Searching */
|
---|
540 | for (; y + m <= ys + n; y += *(qstable + y[m])) {
|
---|
541 | if (*xs == *y && memcmp(xs, y, m) == 0)
|
---|
542 | return (mrb_int)(y - ys);
|
---|
543 | }
|
---|
544 | return -1;
|
---|
545 | }
|
---|
546 | }
|
---|
547 |
|
---|
548 | static mrb_int
|
---|
549 | mrb_memsearch(const void *x0, mrb_int m, const void *y0, mrb_int n)
|
---|
550 | {
|
---|
551 | const unsigned char *x = (const unsigned char *)x0, *y = (const unsigned char *)y0;
|
---|
552 |
|
---|
553 | if (m > n) return -1;
|
---|
554 | else if (m == n) {
|
---|
555 | return memcmp(x0, y0, m) == 0 ? 0 : -1;
|
---|
556 | }
|
---|
557 | else if (m < 1) {
|
---|
558 | return 0;
|
---|
559 | }
|
---|
560 | else if (m == 1) {
|
---|
561 | const unsigned char *ys = (const unsigned char *)memchr(y, *x, n);
|
---|
562 |
|
---|
563 | if (ys)
|
---|
564 | return (mrb_int)(ys - y);
|
---|
565 | else
|
---|
566 | return -1;
|
---|
567 | }
|
---|
568 | return mrb_memsearch_qs((const unsigned char *)x0, m, (const unsigned char *)y0, n);
|
---|
569 | }
|
---|
570 |
|
---|
571 | static void
|
---|
572 | str_share(mrb_state *mrb, struct RString *orig, struct RString *s)
|
---|
573 | {
|
---|
574 | size_t len = (size_t)orig->as.heap.len;
|
---|
575 |
|
---|
576 | mrb_assert(!RSTR_EMBED_P(orig));
|
---|
577 | if (RSTR_NOFREE_P(orig)) {
|
---|
578 | str_init_nofree(s, orig->as.heap.ptr, len);
|
---|
579 | }
|
---|
580 | else if (RSTR_SHARED_P(orig)) {
|
---|
581 | str_init_shared(mrb, orig, s, orig->as.heap.aux.shared);
|
---|
582 | }
|
---|
583 | else if (RSTR_FSHARED_P(orig)) {
|
---|
584 | str_init_fshared(orig, s, orig->as.heap.aux.fshared);
|
---|
585 | }
|
---|
586 | else if (mrb_frozen_p(orig) && !RSTR_POOL_P(orig)) {
|
---|
587 | str_init_fshared(orig, s, orig);
|
---|
588 | }
|
---|
589 | else {
|
---|
590 | if (orig->as.heap.aux.capa > orig->as.heap.len) {
|
---|
591 | orig->as.heap.ptr = (char *)mrb_realloc(mrb, orig->as.heap.ptr, len+1);
|
---|
592 | orig->as.heap.aux.capa = (mrb_ssize)len;
|
---|
593 | }
|
---|
594 | str_init_shared(mrb, orig, s, NULL);
|
---|
595 | str_init_shared(mrb, orig, orig, s->as.heap.aux.shared);
|
---|
596 | }
|
---|
597 | }
|
---|
598 |
|
---|
599 | mrb_value
|
---|
600 | mrb_str_pool(mrb_state *mrb, const char *p, mrb_int len, mrb_bool nofree)
|
---|
601 | {
|
---|
602 | struct RString *s = (struct RString *)mrb_malloc(mrb, sizeof(struct RString));
|
---|
603 |
|
---|
604 | s->tt = MRB_TT_STRING;
|
---|
605 | s->c = mrb->string_class;
|
---|
606 | s->flags = 0;
|
---|
607 |
|
---|
608 | if (RSTR_EMBEDDABLE_P(len)) {
|
---|
609 | str_init_embed(s, p, len);
|
---|
610 | }
|
---|
611 | else if (nofree) {
|
---|
612 | str_init_nofree(s, p, len);
|
---|
613 | }
|
---|
614 | else {
|
---|
615 | str_init_normal(mrb, s, p, len);
|
---|
616 | }
|
---|
617 | RSTR_SET_POOL_FLAG(s);
|
---|
618 | MRB_SET_FROZEN_FLAG(s);
|
---|
619 | return mrb_obj_value(s);
|
---|
620 | }
|
---|
621 |
|
---|
622 | mrb_value
|
---|
623 | mrb_str_byte_subseq(mrb_state *mrb, mrb_value str, mrb_int beg, mrb_int len)
|
---|
624 | {
|
---|
625 | struct RString *orig, *s;
|
---|
626 |
|
---|
627 | orig = mrb_str_ptr(str);
|
---|
628 | s = mrb_obj_alloc_string(mrb);
|
---|
629 | if (RSTR_EMBEDDABLE_P(len)) {
|
---|
630 | str_init_embed(s, RSTR_PTR(orig)+beg, len);
|
---|
631 | }
|
---|
632 | else {
|
---|
633 | str_share(mrb, orig, s);
|
---|
634 | s->as.heap.ptr += (mrb_ssize)beg;
|
---|
635 | s->as.heap.len = (mrb_ssize)len;
|
---|
636 | }
|
---|
637 | RSTR_COPY_ASCII_FLAG(s, orig);
|
---|
638 | return mrb_obj_value(s);
|
---|
639 | }
|
---|
640 |
|
---|
641 | static void
|
---|
642 | str_range_to_bytes(mrb_value str, mrb_int *pos, mrb_int *len)
|
---|
643 | {
|
---|
644 | *pos = chars2bytes(str, 0, *pos);
|
---|
645 | *len = chars2bytes(str, *pos, *len);
|
---|
646 | }
|
---|
647 | #ifdef MRB_UTF8_STRING
|
---|
648 | static inline mrb_value
|
---|
649 | str_subseq(mrb_state *mrb, mrb_value str, mrb_int beg, mrb_int len)
|
---|
650 | {
|
---|
651 | str_range_to_bytes(str, &beg, &len);
|
---|
652 | return mrb_str_byte_subseq(mrb, str, beg, len);
|
---|
653 | }
|
---|
654 | #else
|
---|
655 | #define str_subseq(mrb, str, beg, len) mrb_str_byte_subseq(mrb, str, beg, len)
|
---|
656 | #endif
|
---|
657 |
|
---|
658 | mrb_bool
|
---|
659 | mrb_str_beg_len(mrb_int str_len, mrb_int *begp, mrb_int *lenp)
|
---|
660 | {
|
---|
661 | if (str_len < *begp || *lenp < 0) return FALSE;
|
---|
662 | if (*begp < 0) {
|
---|
663 | *begp += str_len;
|
---|
664 | if (*begp < 0) return FALSE;
|
---|
665 | }
|
---|
666 | if (*lenp > str_len - *begp)
|
---|
667 | *lenp = str_len - *begp;
|
---|
668 | if (*lenp <= 0) {
|
---|
669 | *lenp = 0;
|
---|
670 | }
|
---|
671 | return TRUE;
|
---|
672 | }
|
---|
673 |
|
---|
674 | static mrb_value
|
---|
675 | str_substr(mrb_state *mrb, mrb_value str, mrb_int beg, mrb_int len)
|
---|
676 | {
|
---|
677 | return mrb_str_beg_len(RSTRING_CHAR_LEN(str), &beg, &len) ?
|
---|
678 | str_subseq(mrb, str, beg, len) : mrb_nil_value();
|
---|
679 | }
|
---|
680 |
|
---|
681 | MRB_API mrb_int
|
---|
682 | mrb_str_index(mrb_state *mrb, mrb_value str, const char *sptr, mrb_int slen, mrb_int offset)
|
---|
683 | {
|
---|
684 | mrb_int pos;
|
---|
685 | char *s;
|
---|
686 | mrb_int len;
|
---|
687 |
|
---|
688 | len = RSTRING_LEN(str);
|
---|
689 | if (offset < 0) {
|
---|
690 | offset += len;
|
---|
691 | if (offset < 0) return -1;
|
---|
692 | }
|
---|
693 | if (len - offset < slen) return -1;
|
---|
694 | s = RSTRING_PTR(str);
|
---|
695 | if (offset) {
|
---|
696 | s += offset;
|
---|
697 | }
|
---|
698 | if (slen == 0) return offset;
|
---|
699 | /* need proceed one character at a time */
|
---|
700 | len = RSTRING_LEN(str) - offset;
|
---|
701 | pos = mrb_memsearch(sptr, slen, s, len);
|
---|
702 | if (pos < 0) return pos;
|
---|
703 | return pos + offset;
|
---|
704 | }
|
---|
705 |
|
---|
706 | static mrb_int
|
---|
707 | str_index_str(mrb_state *mrb, mrb_value str, mrb_value str2, mrb_int offset)
|
---|
708 | {
|
---|
709 | const char *ptr;
|
---|
710 | mrb_int len;
|
---|
711 |
|
---|
712 | ptr = RSTRING_PTR(str2);
|
---|
713 | len = RSTRING_LEN(str2);
|
---|
714 |
|
---|
715 | return mrb_str_index(mrb, str, ptr, len, offset);
|
---|
716 | }
|
---|
717 |
|
---|
718 | static mrb_value
|
---|
719 | str_replace(mrb_state *mrb, struct RString *s1, struct RString *s2)
|
---|
720 | {
|
---|
721 | size_t len;
|
---|
722 |
|
---|
723 | mrb_check_frozen(mrb, s1);
|
---|
724 | if (s1 == s2) return mrb_obj_value(s1);
|
---|
725 | RSTR_COPY_ASCII_FLAG(s1, s2);
|
---|
726 | if (RSTR_SHARED_P(s1)) {
|
---|
727 | str_decref(mrb, s1->as.heap.aux.shared);
|
---|
728 | }
|
---|
729 | else if (!RSTR_EMBED_P(s1) && !RSTR_NOFREE_P(s1) && !RSTR_FSHARED_P(s1)
|
---|
730 | && s1->as.heap.ptr) {
|
---|
731 | mrb_free(mrb, s1->as.heap.ptr);
|
---|
732 | }
|
---|
733 |
|
---|
734 | len = (size_t)RSTR_LEN(s2);
|
---|
735 | if (RSTR_EMBEDDABLE_P(len)) {
|
---|
736 | str_init_embed(s1, RSTR_PTR(s2), len);
|
---|
737 | }
|
---|
738 | else {
|
---|
739 | str_share(mrb, s2, s1);
|
---|
740 | }
|
---|
741 |
|
---|
742 | return mrb_obj_value(s1);
|
---|
743 | }
|
---|
744 |
|
---|
745 | static mrb_int
|
---|
746 | str_rindex(mrb_state *mrb, mrb_value str, mrb_value sub, mrb_int pos)
|
---|
747 | {
|
---|
748 | const char *s, *sbeg, *t;
|
---|
749 | struct RString *ps = mrb_str_ptr(str);
|
---|
750 | mrb_int len = RSTRING_LEN(sub);
|
---|
751 |
|
---|
752 | /* substring longer than string */
|
---|
753 | if (RSTR_LEN(ps) < len) return -1;
|
---|
754 | if (RSTR_LEN(ps) - pos < len) {
|
---|
755 | pos = RSTR_LEN(ps) - len;
|
---|
756 | }
|
---|
757 | sbeg = RSTR_PTR(ps);
|
---|
758 | s = RSTR_PTR(ps) + pos;
|
---|
759 | t = RSTRING_PTR(sub);
|
---|
760 | if (len) {
|
---|
761 | s = char_adjust(sbeg, sbeg + RSTR_LEN(ps), s);
|
---|
762 | while (sbeg <= s) {
|
---|
763 | if (memcmp(s, t, len) == 0) {
|
---|
764 | return (mrb_int)(s - RSTR_PTR(ps));
|
---|
765 | }
|
---|
766 | s = char_backtrack(sbeg, s);
|
---|
767 | }
|
---|
768 | return -1;
|
---|
769 | }
|
---|
770 | else {
|
---|
771 | return pos;
|
---|
772 | }
|
---|
773 | }
|
---|
774 |
|
---|
775 | MRB_API mrb_int
|
---|
776 | mrb_str_strlen(mrb_state *mrb, struct RString *s)
|
---|
777 | {
|
---|
778 | mrb_int i, max = RSTR_LEN(s);
|
---|
779 | char *p = RSTR_PTR(s);
|
---|
780 |
|
---|
781 | if (!p) return 0;
|
---|
782 | for (i=0; i<max; i++) {
|
---|
783 | if (p[i] == '\0') {
|
---|
784 | mrb_raise(mrb, E_ARGUMENT_ERROR, "string contains null byte");
|
---|
785 | }
|
---|
786 | }
|
---|
787 | return max;
|
---|
788 | }
|
---|
789 |
|
---|
790 | #ifdef _WIN32
|
---|
791 | #include <windows.h>
|
---|
792 |
|
---|
793 | char*
|
---|
794 | mrb_utf8_from_locale(const char *str, int len)
|
---|
795 | {
|
---|
796 | wchar_t* wcsp;
|
---|
797 | char* mbsp;
|
---|
798 | int mbssize, wcssize;
|
---|
799 |
|
---|
800 | if (len == 0)
|
---|
801 | return strdup("");
|
---|
802 | if (len == -1)
|
---|
803 | len = (int)strlen(str);
|
---|
804 | wcssize = MultiByteToWideChar(GetACP(), 0, str, len, NULL, 0);
|
---|
805 | wcsp = (wchar_t*) malloc((wcssize + 1) * sizeof(wchar_t));
|
---|
806 | if (!wcsp)
|
---|
807 | return NULL;
|
---|
808 | wcssize = MultiByteToWideChar(GetACP(), 0, str, len, wcsp, wcssize + 1);
|
---|
809 | wcsp[wcssize] = 0;
|
---|
810 |
|
---|
811 | mbssize = WideCharToMultiByte(CP_UTF8, 0, (LPCWSTR) wcsp, -1, NULL, 0, NULL, NULL);
|
---|
812 | mbsp = (char*) malloc((mbssize + 1));
|
---|
813 | if (!mbsp) {
|
---|
814 | free(wcsp);
|
---|
815 | return NULL;
|
---|
816 | }
|
---|
817 | mbssize = WideCharToMultiByte(CP_UTF8, 0, (LPCWSTR) wcsp, -1, mbsp, mbssize, NULL, NULL);
|
---|
818 | mbsp[mbssize] = 0;
|
---|
819 | free(wcsp);
|
---|
820 | return mbsp;
|
---|
821 | }
|
---|
822 |
|
---|
823 | char*
|
---|
824 | mrb_locale_from_utf8(const char *utf8, int len)
|
---|
825 | {
|
---|
826 | wchar_t* wcsp;
|
---|
827 | char* mbsp;
|
---|
828 | int mbssize, wcssize;
|
---|
829 |
|
---|
830 | if (len == 0)
|
---|
831 | return strdup("");
|
---|
832 | if (len == -1)
|
---|
833 | len = (int)strlen(utf8);
|
---|
834 | wcssize = MultiByteToWideChar(CP_UTF8, 0, utf8, len, NULL, 0);
|
---|
835 | wcsp = (wchar_t*) malloc((wcssize + 1) * sizeof(wchar_t));
|
---|
836 | if (!wcsp)
|
---|
837 | return NULL;
|
---|
838 | wcssize = MultiByteToWideChar(CP_UTF8, 0, utf8, len, wcsp, wcssize + 1);
|
---|
839 | wcsp[wcssize] = 0;
|
---|
840 | mbssize = WideCharToMultiByte(GetACP(), 0, (LPCWSTR) wcsp, -1, NULL, 0, NULL, NULL);
|
---|
841 | mbsp = (char*) malloc((mbssize + 1));
|
---|
842 | if (!mbsp) {
|
---|
843 | free(wcsp);
|
---|
844 | return NULL;
|
---|
845 | }
|
---|
846 | mbssize = WideCharToMultiByte(GetACP(), 0, (LPCWSTR) wcsp, -1, mbsp, mbssize, NULL, NULL);
|
---|
847 | mbsp[mbssize] = 0;
|
---|
848 | free(wcsp);
|
---|
849 | return mbsp;
|
---|
850 | }
|
---|
851 | #endif
|
---|
852 |
|
---|
853 | MRB_API void
|
---|
854 | mrb_str_modify_keep_ascii(mrb_state *mrb, struct RString *s)
|
---|
855 | {
|
---|
856 | mrb_check_frozen(mrb, s);
|
---|
857 | str_modify_keep_ascii(mrb, s);
|
---|
858 | }
|
---|
859 |
|
---|
860 | MRB_API void
|
---|
861 | mrb_str_modify(mrb_state *mrb, struct RString *s)
|
---|
862 | {
|
---|
863 | mrb_str_modify_keep_ascii(mrb, s);
|
---|
864 | RSTR_UNSET_ASCII_FLAG(s);
|
---|
865 | }
|
---|
866 |
|
---|
867 | MRB_API mrb_value
|
---|
868 | mrb_str_resize(mrb_state *mrb, mrb_value str, mrb_int len)
|
---|
869 | {
|
---|
870 | mrb_int slen;
|
---|
871 | struct RString *s = mrb_str_ptr(str);
|
---|
872 |
|
---|
873 | if (len < 0) {
|
---|
874 | mrb_raise(mrb, E_ARGUMENT_ERROR, "negative (or overflowed) string size");
|
---|
875 | }
|
---|
876 | mrb_str_modify(mrb, s);
|
---|
877 | slen = RSTR_LEN(s);
|
---|
878 | if (len != slen) {
|
---|
879 | if (slen < len || slen - len > 256) {
|
---|
880 | resize_capa(mrb, s, len);
|
---|
881 | }
|
---|
882 | RSTR_SET_LEN(s, len);
|
---|
883 | RSTR_PTR(s)[len] = '\0'; /* sentinel */
|
---|
884 | }
|
---|
885 | return str;
|
---|
886 | }
|
---|
887 |
|
---|
888 | MRB_API char*
|
---|
889 | mrb_str_to_cstr(mrb_state *mrb, mrb_value str0)
|
---|
890 | {
|
---|
891 | struct RString *s;
|
---|
892 |
|
---|
893 | check_null_byte(mrb, str0);
|
---|
894 | s = str_new(mrb, RSTRING_PTR(str0), RSTRING_LEN(str0));
|
---|
895 | return RSTR_PTR(s);
|
---|
896 | }
|
---|
897 |
|
---|
898 | MRB_API void
|
---|
899 | mrb_str_concat(mrb_state *mrb, mrb_value self, mrb_value other)
|
---|
900 | {
|
---|
901 | other = mrb_str_to_str(mrb, other);
|
---|
902 | mrb_str_cat_str(mrb, self, other);
|
---|
903 | }
|
---|
904 |
|
---|
905 | MRB_API mrb_value
|
---|
906 | mrb_str_plus(mrb_state *mrb, mrb_value a, mrb_value b)
|
---|
907 | {
|
---|
908 | struct RString *s = mrb_str_ptr(a);
|
---|
909 | struct RString *s2 = mrb_str_ptr(b);
|
---|
910 | struct RString *t;
|
---|
911 |
|
---|
912 | t = str_new(mrb, 0, RSTR_LEN(s) + RSTR_LEN(s2));
|
---|
913 | memcpy(RSTR_PTR(t), RSTR_PTR(s), RSTR_LEN(s));
|
---|
914 | memcpy(RSTR_PTR(t) + RSTR_LEN(s), RSTR_PTR(s2), RSTR_LEN(s2));
|
---|
915 |
|
---|
916 | return mrb_obj_value(t);
|
---|
917 | }
|
---|
918 |
|
---|
919 | /* 15.2.10.5.2 */
|
---|
920 |
|
---|
921 | /*
|
---|
922 | * call-seq:
|
---|
923 | * str + other_str -> new_str
|
---|
924 | *
|
---|
925 | * Concatenation---Returns a new <code>String</code> containing
|
---|
926 | * <i>other_str</i> concatenated to <i>str</i>.
|
---|
927 | *
|
---|
928 | * "Hello from " + self.to_s #=> "Hello from main"
|
---|
929 | */
|
---|
930 | static mrb_value
|
---|
931 | mrb_str_plus_m(mrb_state *mrb, mrb_value self)
|
---|
932 | {
|
---|
933 | mrb_value str;
|
---|
934 |
|
---|
935 | mrb_get_args(mrb, "S", &str);
|
---|
936 | return mrb_str_plus(mrb, self, str);
|
---|
937 | }
|
---|
938 |
|
---|
939 | /* 15.2.10.5.26 */
|
---|
940 | /* 15.2.10.5.33 */
|
---|
941 | /*
|
---|
942 | * call-seq:
|
---|
943 | * "abcd".size => int
|
---|
944 | *
|
---|
945 | * Returns the length of string.
|
---|
946 | */
|
---|
947 | static mrb_value
|
---|
948 | mrb_str_size(mrb_state *mrb, mrb_value self)
|
---|
949 | {
|
---|
950 | mrb_int len = RSTRING_CHAR_LEN(self);
|
---|
951 | return mrb_fixnum_value(len);
|
---|
952 | }
|
---|
953 |
|
---|
954 | static mrb_value
|
---|
955 | mrb_str_bytesize(mrb_state *mrb, mrb_value self)
|
---|
956 | {
|
---|
957 | mrb_int len = RSTRING_LEN(self);
|
---|
958 | return mrb_fixnum_value(len);
|
---|
959 | }
|
---|
960 |
|
---|
961 | /* 15.2.10.5.1 */
|
---|
962 | /*
|
---|
963 | * call-seq:
|
---|
964 | * str * integer => new_str
|
---|
965 | *
|
---|
966 | * Copy---Returns a new <code>String</code> containing <i>integer</i> copies of
|
---|
967 | * the receiver.
|
---|
968 | *
|
---|
969 | * "Ho! " * 3 #=> "Ho! Ho! Ho! "
|
---|
970 | */
|
---|
971 | static mrb_value
|
---|
972 | mrb_str_times(mrb_state *mrb, mrb_value self)
|
---|
973 | {
|
---|
974 | mrb_int n,len,times;
|
---|
975 | struct RString *str2;
|
---|
976 | char *p;
|
---|
977 |
|
---|
978 | mrb_get_args(mrb, "i", ×);
|
---|
979 | if (times < 0) {
|
---|
980 | mrb_raise(mrb, E_ARGUMENT_ERROR, "negative argument");
|
---|
981 | }
|
---|
982 | if (times && MRB_SSIZE_MAX / times < RSTRING_LEN(self)) {
|
---|
983 | mrb_raise(mrb, E_ARGUMENT_ERROR, "argument too big");
|
---|
984 | }
|
---|
985 |
|
---|
986 | len = RSTRING_LEN(self)*times;
|
---|
987 | str2 = str_new(mrb, 0, len);
|
---|
988 | str_with_class(str2, self);
|
---|
989 | p = RSTR_PTR(str2);
|
---|
990 | if (len > 0) {
|
---|
991 | n = RSTRING_LEN(self);
|
---|
992 | memcpy(p, RSTRING_PTR(self), n);
|
---|
993 | while (n <= len/2) {
|
---|
994 | memcpy(p + n, p, n);
|
---|
995 | n *= 2;
|
---|
996 | }
|
---|
997 | memcpy(p + n, p, len-n);
|
---|
998 | }
|
---|
999 | p[RSTR_LEN(str2)] = '\0';
|
---|
1000 | RSTR_COPY_ASCII_FLAG(str2, mrb_str_ptr(self));
|
---|
1001 |
|
---|
1002 | return mrb_obj_value(str2);
|
---|
1003 | }
|
---|
1004 | /* -------------------------------------------------------------- */
|
---|
1005 |
|
---|
1006 | #define lesser(a,b) (((a)>(b))?(b):(a))
|
---|
1007 |
|
---|
1008 | /* ---------------------------*/
|
---|
1009 | /*
|
---|
1010 | * call-seq:
|
---|
1011 | * mrb_value str1 <=> mrb_value str2 => int
|
---|
1012 | * > 1
|
---|
1013 | * = 0
|
---|
1014 | * < -1
|
---|
1015 | */
|
---|
1016 | MRB_API int
|
---|
1017 | mrb_str_cmp(mrb_state *mrb, mrb_value str1, mrb_value str2)
|
---|
1018 | {
|
---|
1019 | mrb_int len;
|
---|
1020 | mrb_int retval;
|
---|
1021 | struct RString *s1 = mrb_str_ptr(str1);
|
---|
1022 | struct RString *s2 = mrb_str_ptr(str2);
|
---|
1023 |
|
---|
1024 | len = lesser(RSTR_LEN(s1), RSTR_LEN(s2));
|
---|
1025 | retval = memcmp(RSTR_PTR(s1), RSTR_PTR(s2), len);
|
---|
1026 | if (retval == 0) {
|
---|
1027 | if (RSTR_LEN(s1) == RSTR_LEN(s2)) return 0;
|
---|
1028 | if (RSTR_LEN(s1) > RSTR_LEN(s2)) return 1;
|
---|
1029 | return -1;
|
---|
1030 | }
|
---|
1031 | if (retval > 0) return 1;
|
---|
1032 | return -1;
|
---|
1033 | }
|
---|
1034 |
|
---|
1035 | /* 15.2.10.5.3 */
|
---|
1036 |
|
---|
1037 | /*
|
---|
1038 | * call-seq:
|
---|
1039 | * str <=> other_str => -1, 0, +1
|
---|
1040 | *
|
---|
1041 | * Comparison---Returns -1 if <i>other_str</i> is less than, 0 if
|
---|
1042 | * <i>other_str</i> is equal to, and +1 if <i>other_str</i> is greater than
|
---|
1043 | * <i>str</i>. If the strings are of different lengths, and the strings are
|
---|
1044 | * equal when compared up to the shortest length, then the longer string is
|
---|
1045 | * considered greater than the shorter one. If the variable <code>$=</code> is
|
---|
1046 | * <code>false</code>, the comparison is based on comparing the binary values
|
---|
1047 | * of each character in the string. In older versions of Ruby, setting
|
---|
1048 | * <code>$=</code> allowed case-insensitive comparisons; this is now deprecated
|
---|
1049 | * in favor of using <code>String#casecmp</code>.
|
---|
1050 | *
|
---|
1051 | * <code><=></code> is the basis for the methods <code><</code>,
|
---|
1052 | * <code><=</code>, <code>></code>, <code>>=</code>, and <code>between?</code>,
|
---|
1053 | * included from module <code>Comparable</code>. The method
|
---|
1054 | * <code>String#==</code> does not use <code>Comparable#==</code>.
|
---|
1055 | *
|
---|
1056 | * "abcdef" <=> "abcde" #=> 1
|
---|
1057 | * "abcdef" <=> "abcdef" #=> 0
|
---|
1058 | * "abcdef" <=> "abcdefg" #=> -1
|
---|
1059 | * "abcdef" <=> "ABCDEF" #=> 1
|
---|
1060 | */
|
---|
1061 | static mrb_value
|
---|
1062 | mrb_str_cmp_m(mrb_state *mrb, mrb_value str1)
|
---|
1063 | {
|
---|
1064 | mrb_value str2;
|
---|
1065 | mrb_int result;
|
---|
1066 |
|
---|
1067 | mrb_get_args(mrb, "o", &str2);
|
---|
1068 | if (!mrb_string_p(str2)) {
|
---|
1069 | return mrb_nil_value();
|
---|
1070 | }
|
---|
1071 | else {
|
---|
1072 | result = mrb_str_cmp(mrb, str1, str2);
|
---|
1073 | }
|
---|
1074 | return mrb_fixnum_value(result);
|
---|
1075 | }
|
---|
1076 |
|
---|
1077 | static mrb_bool
|
---|
1078 | str_eql(mrb_state *mrb, const mrb_value str1, const mrb_value str2)
|
---|
1079 | {
|
---|
1080 | const mrb_int len = RSTRING_LEN(str1);
|
---|
1081 |
|
---|
1082 | if (len != RSTRING_LEN(str2)) return FALSE;
|
---|
1083 | if (memcmp(RSTRING_PTR(str1), RSTRING_PTR(str2), (size_t)len) == 0)
|
---|
1084 | return TRUE;
|
---|
1085 | return FALSE;
|
---|
1086 | }
|
---|
1087 |
|
---|
1088 | MRB_API mrb_bool
|
---|
1089 | mrb_str_equal(mrb_state *mrb, mrb_value str1, mrb_value str2)
|
---|
1090 | {
|
---|
1091 | if (!mrb_string_p(str2)) return FALSE;
|
---|
1092 | return str_eql(mrb, str1, str2);
|
---|
1093 | }
|
---|
1094 |
|
---|
1095 | /* 15.2.10.5.4 */
|
---|
1096 | /*
|
---|
1097 | * call-seq:
|
---|
1098 | * str == obj => true or false
|
---|
1099 | *
|
---|
1100 | * Equality---
|
---|
1101 | * If <i>obj</i> is not a <code>String</code>, returns <code>false</code>.
|
---|
1102 | * Otherwise, returns <code>false</code> or <code>true</code>
|
---|
1103 | *
|
---|
1104 | * caution:if <i>str</i> <code><=></code> <i>obj</i> returns zero.
|
---|
1105 | */
|
---|
1106 | static mrb_value
|
---|
1107 | mrb_str_equal_m(mrb_state *mrb, mrb_value str1)
|
---|
1108 | {
|
---|
1109 | mrb_value str2;
|
---|
1110 |
|
---|
1111 | mrb_get_args(mrb, "o", &str2);
|
---|
1112 |
|
---|
1113 | return mrb_bool_value(mrb_str_equal(mrb, str1, str2));
|
---|
1114 | }
|
---|
1115 | /* ---------------------------------- */
|
---|
1116 |
|
---|
1117 | MRB_API mrb_value
|
---|
1118 | mrb_str_to_str(mrb_state *mrb, mrb_value str)
|
---|
1119 | {
|
---|
1120 | switch (mrb_type(str)) {
|
---|
1121 | case MRB_TT_STRING:
|
---|
1122 | return str;
|
---|
1123 | case MRB_TT_SYMBOL:
|
---|
1124 | return mrb_sym_str(mrb, mrb_symbol(str));
|
---|
1125 | case MRB_TT_FIXNUM:
|
---|
1126 | return mrb_fixnum_to_str(mrb, str, 10);
|
---|
1127 | case MRB_TT_CLASS:
|
---|
1128 | case MRB_TT_MODULE:
|
---|
1129 | return mrb_mod_to_s(mrb, str);
|
---|
1130 | default:
|
---|
1131 | return mrb_convert_type(mrb, str, MRB_TT_STRING, "String", "to_s");
|
---|
1132 | }
|
---|
1133 | }
|
---|
1134 |
|
---|
1135 | /* obslete: use RSTRING_PTR() */
|
---|
1136 | MRB_API const char*
|
---|
1137 | mrb_string_value_ptr(mrb_state *mrb, mrb_value str)
|
---|
1138 | {
|
---|
1139 | str = mrb_str_to_str(mrb, str);
|
---|
1140 | return RSTRING_PTR(str);
|
---|
1141 | }
|
---|
1142 |
|
---|
1143 | /* obslete: use RSTRING_LEN() */
|
---|
1144 | MRB_API mrb_int
|
---|
1145 | mrb_string_value_len(mrb_state *mrb, mrb_value ptr)
|
---|
1146 | {
|
---|
1147 | mrb_to_str(mrb, ptr);
|
---|
1148 | return RSTRING_LEN(ptr);
|
---|
1149 | }
|
---|
1150 |
|
---|
1151 | MRB_API mrb_value
|
---|
1152 | mrb_str_dup(mrb_state *mrb, mrb_value str)
|
---|
1153 | {
|
---|
1154 | struct RString *s = mrb_str_ptr(str);
|
---|
1155 | struct RString *dup = str_new(mrb, 0, 0);
|
---|
1156 |
|
---|
1157 | str_with_class(dup, str);
|
---|
1158 | return str_replace(mrb, dup, s);
|
---|
1159 | }
|
---|
1160 |
|
---|
1161 | enum str_convert_range {
|
---|
1162 | /* `beg` and `len` are byte unit in `0 ... str.bytesize` */
|
---|
1163 | STR_BYTE_RANGE_CORRECTED = 1,
|
---|
1164 |
|
---|
1165 | /* `beg` and `len` are char unit in any range */
|
---|
1166 | STR_CHAR_RANGE = 2,
|
---|
1167 |
|
---|
1168 | /* `beg` and `len` are char unit in `0 ... str.size` */
|
---|
1169 | STR_CHAR_RANGE_CORRECTED = 3,
|
---|
1170 |
|
---|
1171 | /* `beg` is out of range */
|
---|
1172 | STR_OUT_OF_RANGE = -1
|
---|
1173 | };
|
---|
1174 |
|
---|
1175 | static enum str_convert_range
|
---|
1176 | str_convert_range(mrb_state *mrb, mrb_value str, mrb_value indx, mrb_value alen, mrb_int *beg, mrb_int *len)
|
---|
1177 | {
|
---|
1178 | if (!mrb_undef_p(alen)) {
|
---|
1179 | *beg = mrb_int(mrb, indx);
|
---|
1180 | *len = mrb_int(mrb, alen);
|
---|
1181 | return STR_CHAR_RANGE;
|
---|
1182 | }
|
---|
1183 | else {
|
---|
1184 | switch (mrb_type(indx)) {
|
---|
1185 | case MRB_TT_FIXNUM:
|
---|
1186 | *beg = mrb_fixnum(indx);
|
---|
1187 | *len = 1;
|
---|
1188 | return STR_CHAR_RANGE;
|
---|
1189 |
|
---|
1190 | case MRB_TT_STRING:
|
---|
1191 | *beg = str_index_str(mrb, str, indx, 0);
|
---|
1192 | if (*beg < 0) { break; }
|
---|
1193 | *len = RSTRING_LEN(indx);
|
---|
1194 | return STR_BYTE_RANGE_CORRECTED;
|
---|
1195 |
|
---|
1196 | case MRB_TT_RANGE:
|
---|
1197 | goto range_arg;
|
---|
1198 |
|
---|
1199 | default:
|
---|
1200 | indx = mrb_to_int(mrb, indx);
|
---|
1201 | if (mrb_fixnum_p(indx)) {
|
---|
1202 | *beg = mrb_fixnum(indx);
|
---|
1203 | *len = 1;
|
---|
1204 | return STR_CHAR_RANGE;
|
---|
1205 | }
|
---|
1206 | range_arg:
|
---|
1207 | *len = RSTRING_CHAR_LEN(str);
|
---|
1208 | switch (mrb_range_beg_len(mrb, indx, beg, len, *len, TRUE)) {
|
---|
1209 | case MRB_RANGE_OK:
|
---|
1210 | return STR_CHAR_RANGE_CORRECTED;
|
---|
1211 | case MRB_RANGE_OUT:
|
---|
1212 | return STR_OUT_OF_RANGE;
|
---|
1213 | default:
|
---|
1214 | break;
|
---|
1215 | }
|
---|
1216 |
|
---|
1217 | mrb_raise(mrb, E_TYPE_ERROR, "can't convert to Fixnum");
|
---|
1218 | }
|
---|
1219 | }
|
---|
1220 | return STR_OUT_OF_RANGE;
|
---|
1221 | }
|
---|
1222 |
|
---|
1223 | static mrb_value
|
---|
1224 | mrb_str_aref(mrb_state *mrb, mrb_value str, mrb_value indx, mrb_value alen)
|
---|
1225 | {
|
---|
1226 | mrb_int beg, len;
|
---|
1227 |
|
---|
1228 | switch (str_convert_range(mrb, str, indx, alen, &beg, &len)) {
|
---|
1229 | case STR_CHAR_RANGE_CORRECTED:
|
---|
1230 | return str_subseq(mrb, str, beg, len);
|
---|
1231 | case STR_CHAR_RANGE:
|
---|
1232 | str = str_substr(mrb, str, beg, len);
|
---|
1233 | if (mrb_undef_p(alen) && !mrb_nil_p(str) && RSTRING_LEN(str) == 0) return mrb_nil_value();
|
---|
1234 | return str;
|
---|
1235 | case STR_BYTE_RANGE_CORRECTED:
|
---|
1236 | if (mrb_string_p(indx)) {
|
---|
1237 | return mrb_str_dup(mrb, indx);
|
---|
1238 | }
|
---|
1239 | else {
|
---|
1240 | return mrb_str_byte_subseq(mrb, str, beg, len);
|
---|
1241 | }
|
---|
1242 | case STR_OUT_OF_RANGE:
|
---|
1243 | default:
|
---|
1244 | return mrb_nil_value();
|
---|
1245 | }
|
---|
1246 | }
|
---|
1247 |
|
---|
1248 | /* 15.2.10.5.6 */
|
---|
1249 | /* 15.2.10.5.34 */
|
---|
1250 | /*
|
---|
1251 | * call-seq:
|
---|
1252 | * str[fixnum] => fixnum or nil
|
---|
1253 | * str[fixnum, fixnum] => new_str or nil
|
---|
1254 | * str[range] => new_str or nil
|
---|
1255 | * str[other_str] => new_str or nil
|
---|
1256 | * str.slice(fixnum) => fixnum or nil
|
---|
1257 | * str.slice(fixnum, fixnum) => new_str or nil
|
---|
1258 | * str.slice(range) => new_str or nil
|
---|
1259 | * str.slice(other_str) => new_str or nil
|
---|
1260 | *
|
---|
1261 | * Element Reference---If passed a single <code>Fixnum</code>, returns the code
|
---|
1262 | * of the character at that position. If passed two <code>Fixnum</code>
|
---|
1263 | * objects, returns a substring starting at the offset given by the first, and
|
---|
1264 | * a length given by the second. If given a range, a substring containing
|
---|
1265 | * characters at offsets given by the range is returned. In all three cases, if
|
---|
1266 | * an offset is negative, it is counted from the end of <i>str</i>. Returns
|
---|
1267 | * <code>nil</code> if the initial offset falls outside the string, the length
|
---|
1268 | * is negative, or the beginning of the range is greater than the end.
|
---|
1269 | *
|
---|
1270 | * If a <code>String</code> is given, that string is returned if it occurs in
|
---|
1271 | * <i>str</i>. In both cases, <code>nil</code> is returned if there is no
|
---|
1272 | * match.
|
---|
1273 | *
|
---|
1274 | * a = "hello there"
|
---|
1275 | * a[1] #=> 101(1.8.7) "e"(1.9.2)
|
---|
1276 | * a[1.1] #=> "e"(1.9.2)
|
---|
1277 | * a[1,3] #=> "ell"
|
---|
1278 | * a[1..3] #=> "ell"
|
---|
1279 | * a[-3,2] #=> "er"
|
---|
1280 | * a[-4..-2] #=> "her"
|
---|
1281 | * a[12..-1] #=> nil
|
---|
1282 | * a[-2..-4] #=> ""
|
---|
1283 | * a["lo"] #=> "lo"
|
---|
1284 | * a["bye"] #=> nil
|
---|
1285 | */
|
---|
1286 | static mrb_value
|
---|
1287 | mrb_str_aref_m(mrb_state *mrb, mrb_value str)
|
---|
1288 | {
|
---|
1289 | mrb_value a1, a2;
|
---|
1290 |
|
---|
1291 | if (mrb_get_args(mrb, "o|o", &a1, &a2) == 1) {
|
---|
1292 | a2 = mrb_undef_value();
|
---|
1293 | }
|
---|
1294 |
|
---|
1295 | return mrb_str_aref(mrb, str, a1, a2);
|
---|
1296 | }
|
---|
1297 |
|
---|
1298 | static mrb_noreturn void
|
---|
1299 | str_out_of_index(mrb_state *mrb, mrb_value index)
|
---|
1300 | {
|
---|
1301 | mrb_raisef(mrb, E_INDEX_ERROR, "index %v out of string", index);
|
---|
1302 | }
|
---|
1303 |
|
---|
1304 | static mrb_value
|
---|
1305 | str_replace_partial(mrb_state *mrb, mrb_value src, mrb_int pos, mrb_int end, mrb_value rep)
|
---|
1306 | {
|
---|
1307 | const mrb_int shrink_threshold = 256;
|
---|
1308 | struct RString *str = mrb_str_ptr(src);
|
---|
1309 | mrb_int len = RSTR_LEN(str);
|
---|
1310 | mrb_int replen, newlen;
|
---|
1311 | char *strp;
|
---|
1312 |
|
---|
1313 | if (end > len) { end = len; }
|
---|
1314 |
|
---|
1315 | if (pos < 0 || pos > len) {
|
---|
1316 | str_out_of_index(mrb, mrb_fixnum_value(pos));
|
---|
1317 | }
|
---|
1318 |
|
---|
1319 | replen = (mrb_nil_p(rep) ? 0 : RSTRING_LEN(rep));
|
---|
1320 | newlen = replen + len - (end - pos);
|
---|
1321 |
|
---|
1322 | if (newlen >= MRB_SSIZE_MAX || newlen < replen /* overflowed */) {
|
---|
1323 | mrb_raise(mrb, E_RUNTIME_ERROR, "string size too big");
|
---|
1324 | }
|
---|
1325 |
|
---|
1326 | mrb_str_modify(mrb, str);
|
---|
1327 |
|
---|
1328 | if (len < newlen) {
|
---|
1329 | resize_capa(mrb, str, newlen);
|
---|
1330 | }
|
---|
1331 |
|
---|
1332 | strp = RSTR_PTR(str);
|
---|
1333 |
|
---|
1334 | memmove(strp + newlen - (len - end), strp + end, len - end);
|
---|
1335 | if (!mrb_nil_p(rep)) {
|
---|
1336 | memmove(strp + pos, RSTRING_PTR(rep), replen);
|
---|
1337 | }
|
---|
1338 | RSTR_SET_LEN(str, newlen);
|
---|
1339 | strp[newlen] = '\0';
|
---|
1340 |
|
---|
1341 | if (len - newlen >= shrink_threshold) {
|
---|
1342 | resize_capa(mrb, str, newlen);
|
---|
1343 | }
|
---|
1344 |
|
---|
1345 | return src;
|
---|
1346 | }
|
---|
1347 |
|
---|
1348 | #define IS_EVSTR(p,e) ((p) < (e) && (*(p) == '$' || *(p) == '@' || *(p) == '{'))
|
---|
1349 |
|
---|
1350 | static mrb_value
|
---|
1351 | str_escape(mrb_state *mrb, mrb_value str, mrb_bool inspect)
|
---|
1352 | {
|
---|
1353 | const char *p, *pend;
|
---|
1354 | char buf[4]; /* `\x??` or UTF-8 character */
|
---|
1355 | mrb_value result = mrb_str_new_lit(mrb, "\"");
|
---|
1356 | #ifdef MRB_UTF8_STRING
|
---|
1357 | uint32_t ascii_flag = MRB_STR_ASCII;
|
---|
1358 | #endif
|
---|
1359 |
|
---|
1360 | p = RSTRING_PTR(str); pend = RSTRING_END(str);
|
---|
1361 | for (;p < pend; p++) {
|
---|
1362 | unsigned char c, cc;
|
---|
1363 | #ifdef MRB_UTF8_STRING
|
---|
1364 | if (inspect) {
|
---|
1365 | mrb_int clen = mrb_utf8len(p, pend);
|
---|
1366 | if (clen > 1) {
|
---|
1367 | mrb_int i;
|
---|
1368 |
|
---|
1369 | for (i=0; i<clen; i++) {
|
---|
1370 | buf[i] = p[i];
|
---|
1371 | }
|
---|
1372 | mrb_str_cat(mrb, result, buf, clen);
|
---|
1373 | p += clen-1;
|
---|
1374 | ascii_flag = 0;
|
---|
1375 | continue;
|
---|
1376 | }
|
---|
1377 | }
|
---|
1378 | #endif
|
---|
1379 | c = *p;
|
---|
1380 | if (c == '"'|| c == '\\' || (c == '#' && IS_EVSTR(p+1, pend))) {
|
---|
1381 | buf[0] = '\\'; buf[1] = c;
|
---|
1382 | mrb_str_cat(mrb, result, buf, 2);
|
---|
1383 | continue;
|
---|
1384 | }
|
---|
1385 | if (ISPRINT(c)) {
|
---|
1386 | buf[0] = c;
|
---|
1387 | mrb_str_cat(mrb, result, buf, 1);
|
---|
1388 | continue;
|
---|
1389 | }
|
---|
1390 | switch (c) {
|
---|
1391 | case '\n': cc = 'n'; break;
|
---|
1392 | case '\r': cc = 'r'; break;
|
---|
1393 | case '\t': cc = 't'; break;
|
---|
1394 | case '\f': cc = 'f'; break;
|
---|
1395 | case '\013': cc = 'v'; break;
|
---|
1396 | case '\010': cc = 'b'; break;
|
---|
1397 | case '\007': cc = 'a'; break;
|
---|
1398 | case 033: cc = 'e'; break;
|
---|
1399 | default: cc = 0; break;
|
---|
1400 | }
|
---|
1401 | if (cc) {
|
---|
1402 | buf[0] = '\\';
|
---|
1403 | buf[1] = (char)cc;
|
---|
1404 | mrb_str_cat(mrb, result, buf, 2);
|
---|
1405 | continue;
|
---|
1406 | }
|
---|
1407 | else {
|
---|
1408 | buf[0] = '\\';
|
---|
1409 | buf[1] = 'x';
|
---|
1410 | buf[3] = mrb_digitmap[c % 16]; c /= 16;
|
---|
1411 | buf[2] = mrb_digitmap[c % 16];
|
---|
1412 | mrb_str_cat(mrb, result, buf, 4);
|
---|
1413 | continue;
|
---|
1414 | }
|
---|
1415 | }
|
---|
1416 | mrb_str_cat_lit(mrb, result, "\"");
|
---|
1417 | #ifdef MRB_UTF8_STRING
|
---|
1418 | if (inspect) {
|
---|
1419 | mrb_str_ptr(str)->flags |= ascii_flag;
|
---|
1420 | mrb_str_ptr(result)->flags |= ascii_flag;
|
---|
1421 | }
|
---|
1422 | else {
|
---|
1423 | RSTR_SET_ASCII_FLAG(mrb_str_ptr(result));
|
---|
1424 | }
|
---|
1425 | #endif
|
---|
1426 |
|
---|
1427 | return result;
|
---|
1428 | }
|
---|
1429 |
|
---|
1430 | static void
|
---|
1431 | mrb_str_aset(mrb_state *mrb, mrb_value str, mrb_value indx, mrb_value alen, mrb_value replace)
|
---|
1432 | {
|
---|
1433 | mrb_int beg, len, charlen;
|
---|
1434 |
|
---|
1435 | mrb_to_str(mrb, replace);
|
---|
1436 |
|
---|
1437 | switch (str_convert_range(mrb, str, indx, alen, &beg, &len)) {
|
---|
1438 | case STR_OUT_OF_RANGE:
|
---|
1439 | default:
|
---|
1440 | mrb_raise(mrb, E_INDEX_ERROR, "string not matched");
|
---|
1441 | case STR_CHAR_RANGE:
|
---|
1442 | if (len < 0) {
|
---|
1443 | mrb_raisef(mrb, E_INDEX_ERROR, "negative length %v", alen);
|
---|
1444 | }
|
---|
1445 | charlen = RSTRING_CHAR_LEN(str);
|
---|
1446 | if (beg < 0) { beg += charlen; }
|
---|
1447 | if (beg < 0 || beg > charlen) { str_out_of_index(mrb, indx); }
|
---|
1448 | /* fall through */
|
---|
1449 | case STR_CHAR_RANGE_CORRECTED:
|
---|
1450 | str_range_to_bytes(str, &beg, &len);
|
---|
1451 | /* fall through */
|
---|
1452 | case STR_BYTE_RANGE_CORRECTED:
|
---|
1453 | str_replace_partial(mrb, str, beg, beg + len, replace);
|
---|
1454 | }
|
---|
1455 | }
|
---|
1456 |
|
---|
1457 | /*
|
---|
1458 | * call-seq:
|
---|
1459 | * str[fixnum] = replace
|
---|
1460 | * str[fixnum, fixnum] = replace
|
---|
1461 | * str[range] = replace
|
---|
1462 | * str[other_str] = replace
|
---|
1463 | *
|
---|
1464 | * Modify +self+ by replacing the content of +self+.
|
---|
1465 | * The portion of the string affected is determined using the same criteria as +String#[]+.
|
---|
1466 | */
|
---|
1467 | static mrb_value
|
---|
1468 | mrb_str_aset_m(mrb_state *mrb, mrb_value str)
|
---|
1469 | {
|
---|
1470 | mrb_value indx, alen, replace;
|
---|
1471 |
|
---|
1472 | switch (mrb_get_args(mrb, "oo|S!", &indx, &alen, &replace)) {
|
---|
1473 | case 2:
|
---|
1474 | replace = alen;
|
---|
1475 | alen = mrb_undef_value();
|
---|
1476 | break;
|
---|
1477 | case 3:
|
---|
1478 | break;
|
---|
1479 | }
|
---|
1480 | mrb_str_aset(mrb, str, indx, alen, replace);
|
---|
1481 | return str;
|
---|
1482 | }
|
---|
1483 |
|
---|
1484 | /* 15.2.10.5.8 */
|
---|
1485 | /*
|
---|
1486 | * call-seq:
|
---|
1487 | * str.capitalize! => str or nil
|
---|
1488 | *
|
---|
1489 | * Modifies <i>str</i> by converting the first character to uppercase and the
|
---|
1490 | * remainder to lowercase. Returns <code>nil</code> if no changes are made.
|
---|
1491 | *
|
---|
1492 | * a = "hello"
|
---|
1493 | * a.capitalize! #=> "Hello"
|
---|
1494 | * a #=> "Hello"
|
---|
1495 | * a.capitalize! #=> nil
|
---|
1496 | */
|
---|
1497 | static mrb_value
|
---|
1498 | mrb_str_capitalize_bang(mrb_state *mrb, mrb_value str)
|
---|
1499 | {
|
---|
1500 | char *p, *pend;
|
---|
1501 | mrb_bool modify = FALSE;
|
---|
1502 | struct RString *s = mrb_str_ptr(str);
|
---|
1503 |
|
---|
1504 | mrb_str_modify_keep_ascii(mrb, s);
|
---|
1505 | if (RSTR_LEN(s) == 0 || !RSTR_PTR(s)) return mrb_nil_value();
|
---|
1506 | p = RSTR_PTR(s); pend = RSTR_PTR(s) + RSTR_LEN(s);
|
---|
1507 | if (ISLOWER(*p)) {
|
---|
1508 | *p = TOUPPER(*p);
|
---|
1509 | modify = TRUE;
|
---|
1510 | }
|
---|
1511 | while (++p < pend) {
|
---|
1512 | if (ISUPPER(*p)) {
|
---|
1513 | *p = TOLOWER(*p);
|
---|
1514 | modify = TRUE;
|
---|
1515 | }
|
---|
1516 | }
|
---|
1517 | if (modify) return str;
|
---|
1518 | return mrb_nil_value();
|
---|
1519 | }
|
---|
1520 |
|
---|
1521 | /* 15.2.10.5.7 */
|
---|
1522 | /*
|
---|
1523 | * call-seq:
|
---|
1524 | * str.capitalize => new_str
|
---|
1525 | *
|
---|
1526 | * Returns a copy of <i>str</i> with the first character converted to uppercase
|
---|
1527 | * and the remainder to lowercase.
|
---|
1528 | *
|
---|
1529 | * "hello".capitalize #=> "Hello"
|
---|
1530 | * "HELLO".capitalize #=> "Hello"
|
---|
1531 | * "123ABC".capitalize #=> "123abc"
|
---|
1532 | */
|
---|
1533 | static mrb_value
|
---|
1534 | mrb_str_capitalize(mrb_state *mrb, mrb_value self)
|
---|
1535 | {
|
---|
1536 | mrb_value str;
|
---|
1537 |
|
---|
1538 | str = mrb_str_dup(mrb, self);
|
---|
1539 | mrb_str_capitalize_bang(mrb, str);
|
---|
1540 | return str;
|
---|
1541 | }
|
---|
1542 |
|
---|
1543 | /* 15.2.10.5.10 */
|
---|
1544 | /*
|
---|
1545 | * call-seq:
|
---|
1546 | * str.chomp!(separator="\n") => str or nil
|
---|
1547 | *
|
---|
1548 | * Modifies <i>str</i> in place as described for <code>String#chomp</code>,
|
---|
1549 | * returning <i>str</i>, or <code>nil</code> if no modifications were made.
|
---|
1550 | */
|
---|
1551 | static mrb_value
|
---|
1552 | mrb_str_chomp_bang(mrb_state *mrb, mrb_value str)
|
---|
1553 | {
|
---|
1554 | mrb_value rs;
|
---|
1555 | mrb_int newline;
|
---|
1556 | char *p, *pp;
|
---|
1557 | mrb_int rslen;
|
---|
1558 | mrb_int len;
|
---|
1559 | mrb_int argc;
|
---|
1560 | struct RString *s = mrb_str_ptr(str);
|
---|
1561 |
|
---|
1562 | argc = mrb_get_args(mrb, "|S", &rs);
|
---|
1563 | mrb_str_modify_keep_ascii(mrb, s);
|
---|
1564 | len = RSTR_LEN(s);
|
---|
1565 | if (argc == 0) {
|
---|
1566 | if (len == 0) return mrb_nil_value();
|
---|
1567 | smart_chomp:
|
---|
1568 | if (RSTR_PTR(s)[len-1] == '\n') {
|
---|
1569 | RSTR_SET_LEN(s, RSTR_LEN(s) - 1);
|
---|
1570 | if (RSTR_LEN(s) > 0 &&
|
---|
1571 | RSTR_PTR(s)[RSTR_LEN(s)-1] == '\r') {
|
---|
1572 | RSTR_SET_LEN(s, RSTR_LEN(s) - 1);
|
---|
1573 | }
|
---|
1574 | }
|
---|
1575 | else if (RSTR_PTR(s)[len-1] == '\r') {
|
---|
1576 | RSTR_SET_LEN(s, RSTR_LEN(s) - 1);
|
---|
1577 | }
|
---|
1578 | else {
|
---|
1579 | return mrb_nil_value();
|
---|
1580 | }
|
---|
1581 | RSTR_PTR(s)[RSTR_LEN(s)] = '\0';
|
---|
1582 | return str;
|
---|
1583 | }
|
---|
1584 |
|
---|
1585 | if (len == 0 || mrb_nil_p(rs)) return mrb_nil_value();
|
---|
1586 | p = RSTR_PTR(s);
|
---|
1587 | rslen = RSTRING_LEN(rs);
|
---|
1588 | if (rslen == 0) {
|
---|
1589 | while (len>0 && p[len-1] == '\n') {
|
---|
1590 | len--;
|
---|
1591 | if (len>0 && p[len-1] == '\r')
|
---|
1592 | len--;
|
---|
1593 | }
|
---|
1594 | if (len < RSTR_LEN(s)) {
|
---|
1595 | RSTR_SET_LEN(s, len);
|
---|
1596 | p[len] = '\0';
|
---|
1597 | return str;
|
---|
1598 | }
|
---|
1599 | return mrb_nil_value();
|
---|
1600 | }
|
---|
1601 | if (rslen > len) return mrb_nil_value();
|
---|
1602 | newline = RSTRING_PTR(rs)[rslen-1];
|
---|
1603 | if (rslen == 1 && newline == '\n')
|
---|
1604 | newline = RSTRING_PTR(rs)[rslen-1];
|
---|
1605 | if (rslen == 1 && newline == '\n')
|
---|
1606 | goto smart_chomp;
|
---|
1607 |
|
---|
1608 | pp = p + len - rslen;
|
---|
1609 | if (p[len-1] == newline &&
|
---|
1610 | (rslen <= 1 ||
|
---|
1611 | memcmp(RSTRING_PTR(rs), pp, rslen) == 0)) {
|
---|
1612 | RSTR_SET_LEN(s, len - rslen);
|
---|
1613 | p[RSTR_LEN(s)] = '\0';
|
---|
1614 | return str;
|
---|
1615 | }
|
---|
1616 | return mrb_nil_value();
|
---|
1617 | }
|
---|
1618 |
|
---|
1619 | /* 15.2.10.5.9 */
|
---|
1620 | /*
|
---|
1621 | * call-seq:
|
---|
1622 | * str.chomp(separator="\n") => new_str
|
---|
1623 | *
|
---|
1624 | * Returns a new <code>String</code> with the given record separator removed
|
---|
1625 | * from the end of <i>str</i> (if present). <code>chomp</code> also removes
|
---|
1626 | * carriage return characters (that is it will remove <code>\n</code>,
|
---|
1627 | * <code>\r</code>, and <code>\r\n</code>).
|
---|
1628 | *
|
---|
1629 | * "hello".chomp #=> "hello"
|
---|
1630 | * "hello\n".chomp #=> "hello"
|
---|
1631 | * "hello\r\n".chomp #=> "hello"
|
---|
1632 | * "hello\n\r".chomp #=> "hello\n"
|
---|
1633 | * "hello\r".chomp #=> "hello"
|
---|
1634 | * "hello \n there".chomp #=> "hello \n there"
|
---|
1635 | * "hello".chomp("llo") #=> "he"
|
---|
1636 | */
|
---|
1637 | static mrb_value
|
---|
1638 | mrb_str_chomp(mrb_state *mrb, mrb_value self)
|
---|
1639 | {
|
---|
1640 | mrb_value str;
|
---|
1641 |
|
---|
1642 | str = mrb_str_dup(mrb, self);
|
---|
1643 | mrb_str_chomp_bang(mrb, str);
|
---|
1644 | return str;
|
---|
1645 | }
|
---|
1646 |
|
---|
1647 | /* 15.2.10.5.12 */
|
---|
1648 | /*
|
---|
1649 | * call-seq:
|
---|
1650 | * str.chop! => str or nil
|
---|
1651 | *
|
---|
1652 | * Processes <i>str</i> as for <code>String#chop</code>, returning <i>str</i>,
|
---|
1653 | * or <code>nil</code> if <i>str</i> is the empty string. See also
|
---|
1654 | * <code>String#chomp!</code>.
|
---|
1655 | */
|
---|
1656 | static mrb_value
|
---|
1657 | mrb_str_chop_bang(mrb_state *mrb, mrb_value str)
|
---|
1658 | {
|
---|
1659 | struct RString *s = mrb_str_ptr(str);
|
---|
1660 |
|
---|
1661 | mrb_str_modify_keep_ascii(mrb, s);
|
---|
1662 | if (RSTR_LEN(s) > 0) {
|
---|
1663 | mrb_int len;
|
---|
1664 | #ifdef MRB_UTF8_STRING
|
---|
1665 | const char* t = RSTR_PTR(s), *p = t;
|
---|
1666 | const char* e = p + RSTR_LEN(s);
|
---|
1667 | while (p<e) {
|
---|
1668 | mrb_int clen = mrb_utf8len(p, e);
|
---|
1669 | if (p + clen>=e) break;
|
---|
1670 | p += clen;
|
---|
1671 | }
|
---|
1672 | len = p - t;
|
---|
1673 | #else
|
---|
1674 | len = RSTR_LEN(s) - 1;
|
---|
1675 | #endif
|
---|
1676 | if (RSTR_PTR(s)[len] == '\n') {
|
---|
1677 | if (len > 0 &&
|
---|
1678 | RSTR_PTR(s)[len-1] == '\r') {
|
---|
1679 | len--;
|
---|
1680 | }
|
---|
1681 | }
|
---|
1682 | RSTR_SET_LEN(s, len);
|
---|
1683 | RSTR_PTR(s)[len] = '\0';
|
---|
1684 | return str;
|
---|
1685 | }
|
---|
1686 | return mrb_nil_value();
|
---|
1687 | }
|
---|
1688 |
|
---|
1689 | /* 15.2.10.5.11 */
|
---|
1690 | /*
|
---|
1691 | * call-seq:
|
---|
1692 | * str.chop => new_str
|
---|
1693 | *
|
---|
1694 | * Returns a new <code>String</code> with the last character removed. If the
|
---|
1695 | * string ends with <code>\r\n</code>, both characters are removed. Applying
|
---|
1696 | * <code>chop</code> to an empty string returns an empty
|
---|
1697 | * string. <code>String#chomp</code> is often a safer alternative, as it leaves
|
---|
1698 | * the string unchanged if it doesn't end in a record separator.
|
---|
1699 | *
|
---|
1700 | * "string\r\n".chop #=> "string"
|
---|
1701 | * "string\n\r".chop #=> "string\n"
|
---|
1702 | * "string\n".chop #=> "string"
|
---|
1703 | * "string".chop #=> "strin"
|
---|
1704 | * "x".chop #=> ""
|
---|
1705 | */
|
---|
1706 | static mrb_value
|
---|
1707 | mrb_str_chop(mrb_state *mrb, mrb_value self)
|
---|
1708 | {
|
---|
1709 | mrb_value str;
|
---|
1710 | str = mrb_str_dup(mrb, self);
|
---|
1711 | mrb_str_chop_bang(mrb, str);
|
---|
1712 | return str;
|
---|
1713 | }
|
---|
1714 |
|
---|
1715 | /* 15.2.10.5.14 */
|
---|
1716 | /*
|
---|
1717 | * call-seq:
|
---|
1718 | * str.downcase! => str or nil
|
---|
1719 | *
|
---|
1720 | * Downcases the contents of <i>str</i>, returning <code>nil</code> if no
|
---|
1721 | * changes were made.
|
---|
1722 | */
|
---|
1723 | static mrb_value
|
---|
1724 | mrb_str_downcase_bang(mrb_state *mrb, mrb_value str)
|
---|
1725 | {
|
---|
1726 | char *p, *pend;
|
---|
1727 | mrb_bool modify = FALSE;
|
---|
1728 | struct RString *s = mrb_str_ptr(str);
|
---|
1729 |
|
---|
1730 | mrb_str_modify_keep_ascii(mrb, s);
|
---|
1731 | p = RSTR_PTR(s);
|
---|
1732 | pend = RSTR_PTR(s) + RSTR_LEN(s);
|
---|
1733 | while (p < pend) {
|
---|
1734 | if (ISUPPER(*p)) {
|
---|
1735 | *p = TOLOWER(*p);
|
---|
1736 | modify = TRUE;
|
---|
1737 | }
|
---|
1738 | p++;
|
---|
1739 | }
|
---|
1740 |
|
---|
1741 | if (modify) return str;
|
---|
1742 | return mrb_nil_value();
|
---|
1743 | }
|
---|
1744 |
|
---|
1745 | /* 15.2.10.5.13 */
|
---|
1746 | /*
|
---|
1747 | * call-seq:
|
---|
1748 | * str.downcase => new_str
|
---|
1749 | *
|
---|
1750 | * Returns a copy of <i>str</i> with all uppercase letters replaced with their
|
---|
1751 | * lowercase counterparts. The operation is locale insensitive---only
|
---|
1752 | * characters 'A' to 'Z' are affected.
|
---|
1753 | *
|
---|
1754 | * "hEllO".downcase #=> "hello"
|
---|
1755 | */
|
---|
1756 | static mrb_value
|
---|
1757 | mrb_str_downcase(mrb_state *mrb, mrb_value self)
|
---|
1758 | {
|
---|
1759 | mrb_value str;
|
---|
1760 |
|
---|
1761 | str = mrb_str_dup(mrb, self);
|
---|
1762 | mrb_str_downcase_bang(mrb, str);
|
---|
1763 | return str;
|
---|
1764 | }
|
---|
1765 |
|
---|
1766 | /* 15.2.10.5.16 */
|
---|
1767 | /*
|
---|
1768 | * call-seq:
|
---|
1769 | * str.empty? => true or false
|
---|
1770 | *
|
---|
1771 | * Returns <code>true</code> if <i>str</i> has a length of zero.
|
---|
1772 | *
|
---|
1773 | * "hello".empty? #=> false
|
---|
1774 | * "".empty? #=> true
|
---|
1775 | */
|
---|
1776 | static mrb_value
|
---|
1777 | mrb_str_empty_p(mrb_state *mrb, mrb_value self)
|
---|
1778 | {
|
---|
1779 | struct RString *s = mrb_str_ptr(self);
|
---|
1780 |
|
---|
1781 | return mrb_bool_value(RSTR_LEN(s) == 0);
|
---|
1782 | }
|
---|
1783 |
|
---|
1784 | /* 15.2.10.5.17 */
|
---|
1785 | /*
|
---|
1786 | * call-seq:
|
---|
1787 | * str.eql?(other) => true or false
|
---|
1788 | *
|
---|
1789 | * Two strings are equal if the have the same length and content.
|
---|
1790 | */
|
---|
1791 | static mrb_value
|
---|
1792 | mrb_str_eql(mrb_state *mrb, mrb_value self)
|
---|
1793 | {
|
---|
1794 | mrb_value str2;
|
---|
1795 | mrb_bool eql_p;
|
---|
1796 |
|
---|
1797 | mrb_get_args(mrb, "o", &str2);
|
---|
1798 | eql_p = (mrb_string_p(str2)) && str_eql(mrb, self, str2);
|
---|
1799 |
|
---|
1800 | return mrb_bool_value(eql_p);
|
---|
1801 | }
|
---|
1802 |
|
---|
1803 | MRB_API mrb_value
|
---|
1804 | mrb_str_substr(mrb_state *mrb, mrb_value str, mrb_int beg, mrb_int len)
|
---|
1805 | {
|
---|
1806 | return str_substr(mrb, str, beg, len);
|
---|
1807 | }
|
---|
1808 |
|
---|
1809 | uint32_t
|
---|
1810 | mrb_str_hash(mrb_state *mrb, mrb_value str)
|
---|
1811 | {
|
---|
1812 | /* 1-8-7 */
|
---|
1813 | struct RString *s = mrb_str_ptr(str);
|
---|
1814 | mrb_int len = RSTR_LEN(s);
|
---|
1815 | char *p = RSTR_PTR(s);
|
---|
1816 | uint64_t key = 0;
|
---|
1817 |
|
---|
1818 | while (len--) {
|
---|
1819 | key = key*65599 + *p;
|
---|
1820 | p++;
|
---|
1821 | }
|
---|
1822 | return (uint32_t)(key + (key>>5));
|
---|
1823 | }
|
---|
1824 |
|
---|
1825 | /* 15.2.10.5.20 */
|
---|
1826 | /*
|
---|
1827 | * call-seq:
|
---|
1828 | * str.hash => fixnum
|
---|
1829 | *
|
---|
1830 | * Return a hash based on the string's length and content.
|
---|
1831 | */
|
---|
1832 | static mrb_value
|
---|
1833 | mrb_str_hash_m(mrb_state *mrb, mrb_value self)
|
---|
1834 | {
|
---|
1835 | mrb_int key = mrb_str_hash(mrb, self);
|
---|
1836 | return mrb_fixnum_value(key);
|
---|
1837 | }
|
---|
1838 |
|
---|
1839 | /* 15.2.10.5.21 */
|
---|
1840 | /*
|
---|
1841 | * call-seq:
|
---|
1842 | * str.include? other_str => true or false
|
---|
1843 | * str.include? fixnum => true or false
|
---|
1844 | *
|
---|
1845 | * Returns <code>true</code> if <i>str</i> contains the given string or
|
---|
1846 | * character.
|
---|
1847 | *
|
---|
1848 | * "hello".include? "lo" #=> true
|
---|
1849 | * "hello".include? "ol" #=> false
|
---|
1850 | * "hello".include? ?h #=> true
|
---|
1851 | */
|
---|
1852 | static mrb_value
|
---|
1853 | mrb_str_include(mrb_state *mrb, mrb_value self)
|
---|
1854 | {
|
---|
1855 | mrb_value str2;
|
---|
1856 |
|
---|
1857 | mrb_get_args(mrb, "S", &str2);
|
---|
1858 | if (str_index_str(mrb, self, str2, 0) < 0)
|
---|
1859 | return mrb_bool_value(FALSE);
|
---|
1860 | return mrb_bool_value(TRUE);
|
---|
1861 | }
|
---|
1862 |
|
---|
1863 | /* 15.2.10.5.22 */
|
---|
1864 | /*
|
---|
1865 | * call-seq:
|
---|
1866 | * str.index(substring [, offset]) => fixnum or nil
|
---|
1867 | *
|
---|
1868 | * Returns the index of the first occurrence of the given
|
---|
1869 | * <i>substring</i>. Returns <code>nil</code> if not found.
|
---|
1870 | * If the second parameter is present, it
|
---|
1871 | * specifies the position in the string to begin the search.
|
---|
1872 | *
|
---|
1873 | * "hello".index('l') #=> 2
|
---|
1874 | * "hello".index('lo') #=> 3
|
---|
1875 | * "hello".index('a') #=> nil
|
---|
1876 | * "hello".index('l', -2) #=> 3
|
---|
1877 | */
|
---|
1878 | static mrb_value
|
---|
1879 | mrb_str_index_m(mrb_state *mrb, mrb_value str)
|
---|
1880 | {
|
---|
1881 | mrb_value sub;
|
---|
1882 | mrb_int pos;
|
---|
1883 |
|
---|
1884 | if (mrb_get_args(mrb, "S|i", &sub, &pos) == 1) {
|
---|
1885 | pos = 0;
|
---|
1886 | }
|
---|
1887 | else if (pos < 0) {
|
---|
1888 | mrb_int clen = RSTRING_CHAR_LEN(str);
|
---|
1889 | pos += clen;
|
---|
1890 | if (pos < 0) {
|
---|
1891 | return mrb_nil_value();
|
---|
1892 | }
|
---|
1893 | }
|
---|
1894 | pos = str_index_str_by_char(mrb, str, sub, pos);
|
---|
1895 |
|
---|
1896 | if (pos == -1) return mrb_nil_value();
|
---|
1897 | BYTES_ALIGN_CHECK(pos);
|
---|
1898 | return mrb_fixnum_value(pos);
|
---|
1899 | }
|
---|
1900 |
|
---|
1901 | /* 15.2.10.5.24 */
|
---|
1902 | /* 15.2.10.5.28 */
|
---|
1903 | /*
|
---|
1904 | * call-seq:
|
---|
1905 | * str.replace(other_str) => str
|
---|
1906 | *
|
---|
1907 | * s = "hello" #=> "hello"
|
---|
1908 | * s.replace "world" #=> "world"
|
---|
1909 | */
|
---|
1910 | static mrb_value
|
---|
1911 | mrb_str_replace(mrb_state *mrb, mrb_value str)
|
---|
1912 | {
|
---|
1913 | mrb_value str2;
|
---|
1914 |
|
---|
1915 | mrb_get_args(mrb, "S", &str2);
|
---|
1916 | return str_replace(mrb, mrb_str_ptr(str), mrb_str_ptr(str2));
|
---|
1917 | }
|
---|
1918 |
|
---|
1919 | /* 15.2.10.5.23 */
|
---|
1920 | /*
|
---|
1921 | * call-seq:
|
---|
1922 | * String.new(str="") => new_str
|
---|
1923 | *
|
---|
1924 | * Returns a new string object containing a copy of <i>str</i>.
|
---|
1925 | */
|
---|
1926 | static mrb_value
|
---|
1927 | mrb_str_init(mrb_state *mrb, mrb_value self)
|
---|
1928 | {
|
---|
1929 | mrb_value str2;
|
---|
1930 |
|
---|
1931 | if (mrb_get_args(mrb, "|S", &str2) == 0) {
|
---|
1932 | struct RString *s = str_new(mrb, 0, 0);
|
---|
1933 | str2 = mrb_obj_value(s);
|
---|
1934 | }
|
---|
1935 | str_replace(mrb, mrb_str_ptr(self), mrb_str_ptr(str2));
|
---|
1936 | return self;
|
---|
1937 | }
|
---|
1938 |
|
---|
1939 | /* 15.2.10.5.25 */
|
---|
1940 | /* 15.2.10.5.41 */
|
---|
1941 | /*
|
---|
1942 | * call-seq:
|
---|
1943 | * str.intern => symbol
|
---|
1944 | * str.to_sym => symbol
|
---|
1945 | *
|
---|
1946 | * Returns the <code>Symbol</code> corresponding to <i>str</i>, creating the
|
---|
1947 | * symbol if it did not previously exist. See <code>Symbol#id2name</code>.
|
---|
1948 | *
|
---|
1949 | * "Koala".intern #=> :Koala
|
---|
1950 | * s = 'cat'.to_sym #=> :cat
|
---|
1951 | * s == :cat #=> true
|
---|
1952 | * s = '@cat'.to_sym #=> :@cat
|
---|
1953 | * s == :@cat #=> true
|
---|
1954 | *
|
---|
1955 | * This can also be used to create symbols that cannot be represented using the
|
---|
1956 | * <code>:xxx</code> notation.
|
---|
1957 | *
|
---|
1958 | * 'cat and dog'.to_sym #=> :"cat and dog"
|
---|
1959 | */
|
---|
1960 | MRB_API mrb_value
|
---|
1961 | mrb_str_intern(mrb_state *mrb, mrb_value self)
|
---|
1962 | {
|
---|
1963 | return mrb_symbol_value(mrb_intern_str(mrb, self));
|
---|
1964 | }
|
---|
1965 | /* ---------------------------------- */
|
---|
1966 | MRB_API mrb_value
|
---|
1967 | mrb_obj_as_string(mrb_state *mrb, mrb_value obj)
|
---|
1968 | {
|
---|
1969 | if (mrb_string_p(obj)) {
|
---|
1970 | return obj;
|
---|
1971 | }
|
---|
1972 | return mrb_str_to_str(mrb, obj);
|
---|
1973 | }
|
---|
1974 |
|
---|
1975 | MRB_API mrb_value
|
---|
1976 | mrb_ptr_to_str(mrb_state *mrb, void *p)
|
---|
1977 | {
|
---|
1978 | struct RString *p_str;
|
---|
1979 | char *p1;
|
---|
1980 | char *p2;
|
---|
1981 | uintptr_t n = (uintptr_t)p;
|
---|
1982 |
|
---|
1983 | p_str = str_new(mrb, NULL, 2 + sizeof(uintptr_t) * CHAR_BIT / 4);
|
---|
1984 | p1 = RSTR_PTR(p_str);
|
---|
1985 | *p1++ = '0';
|
---|
1986 | *p1++ = 'x';
|
---|
1987 | p2 = p1;
|
---|
1988 |
|
---|
1989 | do {
|
---|
1990 | *p2++ = mrb_digitmap[n % 16];
|
---|
1991 | n /= 16;
|
---|
1992 | } while (n > 0);
|
---|
1993 | *p2 = '\0';
|
---|
1994 | RSTR_SET_LEN(p_str, (mrb_int)(p2 - RSTR_PTR(p_str)));
|
---|
1995 |
|
---|
1996 | while (p1 < p2) {
|
---|
1997 | const char c = *p1;
|
---|
1998 | *p1++ = *--p2;
|
---|
1999 | *p2 = c;
|
---|
2000 | }
|
---|
2001 |
|
---|
2002 | return mrb_obj_value(p_str);
|
---|
2003 | }
|
---|
2004 |
|
---|
2005 | static inline void
|
---|
2006 | str_reverse(char *p, char *e)
|
---|
2007 | {
|
---|
2008 | char c;
|
---|
2009 |
|
---|
2010 | while (p < e) {
|
---|
2011 | c = *p;
|
---|
2012 | *p++ = *e;
|
---|
2013 | *e-- = c;
|
---|
2014 | }
|
---|
2015 | }
|
---|
2016 |
|
---|
2017 | /* 15.2.10.5.30 */
|
---|
2018 | /*
|
---|
2019 | * call-seq:
|
---|
2020 | * str.reverse! => str
|
---|
2021 | *
|
---|
2022 | * Reverses <i>str</i> in place.
|
---|
2023 | */
|
---|
2024 | static mrb_value
|
---|
2025 | mrb_str_reverse_bang(mrb_state *mrb, mrb_value str)
|
---|
2026 | {
|
---|
2027 | struct RString *s = mrb_str_ptr(str);
|
---|
2028 | char *p, *e;
|
---|
2029 |
|
---|
2030 | #ifdef MRB_UTF8_STRING
|
---|
2031 | mrb_int utf8_len = RSTRING_CHAR_LEN(str);
|
---|
2032 | mrb_int len = RSTR_LEN(s);
|
---|
2033 |
|
---|
2034 | if (utf8_len < 2) return str;
|
---|
2035 | if (utf8_len < len) {
|
---|
2036 | mrb_str_modify(mrb, s);
|
---|
2037 | p = RSTR_PTR(s);
|
---|
2038 | e = p + RSTR_LEN(s);
|
---|
2039 | while (p<e) {
|
---|
2040 | mrb_int clen = mrb_utf8len(p, e);
|
---|
2041 | str_reverse(p, p + clen - 1);
|
---|
2042 | p += clen;
|
---|
2043 | }
|
---|
2044 | goto bytes;
|
---|
2045 | }
|
---|
2046 | #endif
|
---|
2047 |
|
---|
2048 | if (RSTR_LEN(s) > 1) {
|
---|
2049 | mrb_str_modify(mrb, s);
|
---|
2050 | goto bytes;
|
---|
2051 | }
|
---|
2052 | return str;
|
---|
2053 |
|
---|
2054 | bytes:
|
---|
2055 | p = RSTR_PTR(s);
|
---|
2056 | e = p + RSTR_LEN(s) - 1;
|
---|
2057 | str_reverse(p, e);
|
---|
2058 | return str;
|
---|
2059 | }
|
---|
2060 |
|
---|
2061 | /* ---------------------------------- */
|
---|
2062 | /* 15.2.10.5.29 */
|
---|
2063 | /*
|
---|
2064 | * call-seq:
|
---|
2065 | * str.reverse => new_str
|
---|
2066 | *
|
---|
2067 | * Returns a new string with the characters from <i>str</i> in reverse order.
|
---|
2068 | *
|
---|
2069 | * "stressed".reverse #=> "desserts"
|
---|
2070 | */
|
---|
2071 | static mrb_value
|
---|
2072 | mrb_str_reverse(mrb_state *mrb, mrb_value str)
|
---|
2073 | {
|
---|
2074 | mrb_value str2 = mrb_str_dup(mrb, str);
|
---|
2075 | mrb_str_reverse_bang(mrb, str2);
|
---|
2076 | return str2;
|
---|
2077 | }
|
---|
2078 |
|
---|
2079 | /* 15.2.10.5.31 */
|
---|
2080 | /*
|
---|
2081 | * call-seq:
|
---|
2082 | * str.rindex(substring [, offset]) => fixnum or nil
|
---|
2083 | *
|
---|
2084 | * Returns the index of the last occurrence of the given <i>substring</i>.
|
---|
2085 | * Returns <code>nil</code> if not found. If the second parameter is
|
---|
2086 | * present, it specifies the position in the string to end the
|
---|
2087 | * search---characters beyond this point will not be considered.
|
---|
2088 | *
|
---|
2089 | * "hello".rindex('e') #=> 1
|
---|
2090 | * "hello".rindex('l') #=> 3
|
---|
2091 | * "hello".rindex('a') #=> nil
|
---|
2092 | * "hello".rindex('l', 2) #=> 2
|
---|
2093 | */
|
---|
2094 | static mrb_value
|
---|
2095 | mrb_str_rindex(mrb_state *mrb, mrb_value str)
|
---|
2096 | {
|
---|
2097 | mrb_value sub;
|
---|
2098 | mrb_int pos, len = RSTRING_CHAR_LEN(str);
|
---|
2099 |
|
---|
2100 | if (mrb_get_args(mrb, "S|i", &sub, &pos) == 1) {
|
---|
2101 | pos = len;
|
---|
2102 | }
|
---|
2103 | else {
|
---|
2104 | if (pos < 0) {
|
---|
2105 | pos += len;
|
---|
2106 | if (pos < 0) {
|
---|
2107 | return mrb_nil_value();
|
---|
2108 | }
|
---|
2109 | }
|
---|
2110 | if (pos > len) pos = len;
|
---|
2111 | }
|
---|
2112 | pos = chars2bytes(str, 0, pos);
|
---|
2113 | pos = str_rindex(mrb, str, sub, pos);
|
---|
2114 | if (pos >= 0) {
|
---|
2115 | pos = bytes2chars(RSTRING_PTR(str), RSTRING_LEN(str), pos);
|
---|
2116 | BYTES_ALIGN_CHECK(pos);
|
---|
2117 | return mrb_fixnum_value(pos);
|
---|
2118 | }
|
---|
2119 | return mrb_nil_value();
|
---|
2120 | }
|
---|
2121 |
|
---|
2122 | /* 15.2.10.5.35 */
|
---|
2123 |
|
---|
2124 | /*
|
---|
2125 | * call-seq:
|
---|
2126 | * str.split(separator=nil, [limit]) => anArray
|
---|
2127 | *
|
---|
2128 | * Divides <i>str</i> into substrings based on a delimiter, returning an array
|
---|
2129 | * of these substrings.
|
---|
2130 | *
|
---|
2131 | * If <i>separator</i> is a <code>String</code>, then its contents are used as
|
---|
2132 | * the delimiter when splitting <i>str</i>. If <i>separator</i> is a single
|
---|
2133 | * space, <i>str</i> is split on whitespace, with leading whitespace and runs
|
---|
2134 | * of contiguous whitespace characters ignored.
|
---|
2135 | *
|
---|
2136 | * If <i>separator</i> is omitted or <code>nil</code> (which is the default),
|
---|
2137 | * <i>str</i> is split on whitespace as if ' ' were specified.
|
---|
2138 | *
|
---|
2139 | * If the <i>limit</i> parameter is omitted, trailing null fields are
|
---|
2140 | * suppressed. If <i>limit</i> is a positive number, at most that number of
|
---|
2141 | * fields will be returned (if <i>limit</i> is <code>1</code>, the entire
|
---|
2142 | * string is returned as the only entry in an array). If negative, there is no
|
---|
2143 | * limit to the number of fields returned, and trailing null fields are not
|
---|
2144 | * suppressed.
|
---|
2145 | *
|
---|
2146 | * " now's the time".split #=> ["now's", "the", "time"]
|
---|
2147 | * " now's the time".split(' ') #=> ["now's", "the", "time"]
|
---|
2148 | *
|
---|
2149 | * "mellow yellow".split("ello") #=> ["m", "w y", "w"]
|
---|
2150 | * "1,2,,3,4,,".split(',') #=> ["1", "2", "", "3", "4"]
|
---|
2151 | * "1,2,,3,4,,".split(',', 4) #=> ["1", "2", "", "3,4,,"]
|
---|
2152 | * "1,2,,3,4,,".split(',', -4) #=> ["1", "2", "", "3", "4", "", ""]
|
---|
2153 | */
|
---|
2154 |
|
---|
2155 | static mrb_value
|
---|
2156 | mrb_str_split_m(mrb_state *mrb, mrb_value str)
|
---|
2157 | {
|
---|
2158 | mrb_int argc;
|
---|
2159 | mrb_value spat = mrb_nil_value();
|
---|
2160 | enum {awk, string} split_type = string;
|
---|
2161 | mrb_int i = 0;
|
---|
2162 | mrb_int beg;
|
---|
2163 | mrb_int end;
|
---|
2164 | mrb_int lim = 0;
|
---|
2165 | mrb_bool lim_p;
|
---|
2166 | mrb_value result, tmp;
|
---|
2167 |
|
---|
2168 | argc = mrb_get_args(mrb, "|oi", &spat, &lim);
|
---|
2169 | lim_p = (lim > 0 && argc == 2);
|
---|
2170 | if (argc == 2) {
|
---|
2171 | if (lim == 1) {
|
---|
2172 | if (RSTRING_LEN(str) == 0)
|
---|
2173 | return mrb_ary_new_capa(mrb, 0);
|
---|
2174 | return mrb_ary_new_from_values(mrb, 1, &str);
|
---|
2175 | }
|
---|
2176 | i = 1;
|
---|
2177 | }
|
---|
2178 |
|
---|
2179 | if (argc == 0 || mrb_nil_p(spat)) {
|
---|
2180 | split_type = awk;
|
---|
2181 | }
|
---|
2182 | else if (!mrb_string_p(spat)) {
|
---|
2183 | mrb_raise(mrb, E_TYPE_ERROR, "expected String");
|
---|
2184 | }
|
---|
2185 | else if (RSTRING_LEN(spat) == 1 && RSTRING_PTR(spat)[0] == ' ') {
|
---|
2186 | split_type = awk;
|
---|
2187 | }
|
---|
2188 |
|
---|
2189 | result = mrb_ary_new(mrb);
|
---|
2190 | beg = 0;
|
---|
2191 | if (split_type == awk) {
|
---|
2192 | mrb_bool skip = TRUE;
|
---|
2193 | mrb_int idx = 0;
|
---|
2194 | mrb_int str_len = RSTRING_LEN(str);
|
---|
2195 | unsigned int c;
|
---|
2196 | int ai = mrb_gc_arena_save(mrb);
|
---|
2197 |
|
---|
2198 | idx = end = beg;
|
---|
2199 | while (idx < str_len) {
|
---|
2200 | c = (unsigned char)RSTRING_PTR(str)[idx++];
|
---|
2201 | if (skip) {
|
---|
2202 | if (ISSPACE(c)) {
|
---|
2203 | beg = idx;
|
---|
2204 | }
|
---|
2205 | else {
|
---|
2206 | end = idx;
|
---|
2207 | skip = FALSE;
|
---|
2208 | if (lim_p && lim <= i) break;
|
---|
2209 | }
|
---|
2210 | }
|
---|
2211 | else if (ISSPACE(c)) {
|
---|
2212 | mrb_ary_push(mrb, result, mrb_str_byte_subseq(mrb, str, beg, end-beg));
|
---|
2213 | mrb_gc_arena_restore(mrb, ai);
|
---|
2214 | skip = TRUE;
|
---|
2215 | beg = idx;
|
---|
2216 | if (lim_p) ++i;
|
---|
2217 | }
|
---|
2218 | else {
|
---|
2219 | end = idx;
|
---|
2220 | }
|
---|
2221 | }
|
---|
2222 | }
|
---|
2223 | else { /* split_type == string */
|
---|
2224 | mrb_int str_len = RSTRING_LEN(str);
|
---|
2225 | mrb_int pat_len = RSTRING_LEN(spat);
|
---|
2226 | mrb_int idx = 0;
|
---|
2227 | int ai = mrb_gc_arena_save(mrb);
|
---|
2228 |
|
---|
2229 | while (idx < str_len) {
|
---|
2230 | if (pat_len > 0) {
|
---|
2231 | end = mrb_memsearch(RSTRING_PTR(spat), pat_len, RSTRING_PTR(str)+idx, str_len - idx);
|
---|
2232 | if (end < 0) break;
|
---|
2233 | }
|
---|
2234 | else {
|
---|
2235 | end = chars2bytes(str, idx, 1);
|
---|
2236 | }
|
---|
2237 | mrb_ary_push(mrb, result, mrb_str_byte_subseq(mrb, str, idx, end));
|
---|
2238 | mrb_gc_arena_restore(mrb, ai);
|
---|
2239 | idx += end + pat_len;
|
---|
2240 | if (lim_p && lim <= ++i) break;
|
---|
2241 | }
|
---|
2242 | beg = idx;
|
---|
2243 | }
|
---|
2244 | if (RSTRING_LEN(str) > 0 && (lim_p || RSTRING_LEN(str) > beg || lim < 0)) {
|
---|
2245 | if (RSTRING_LEN(str) == beg) {
|
---|
2246 | tmp = mrb_str_new_empty(mrb, str);
|
---|
2247 | }
|
---|
2248 | else {
|
---|
2249 | tmp = mrb_str_byte_subseq(mrb, str, beg, RSTRING_LEN(str)-beg);
|
---|
2250 | }
|
---|
2251 | mrb_ary_push(mrb, result, tmp);
|
---|
2252 | }
|
---|
2253 | if (!lim_p && lim == 0) {
|
---|
2254 | mrb_int len;
|
---|
2255 | while ((len = RARRAY_LEN(result)) > 0 &&
|
---|
2256 | (tmp = RARRAY_PTR(result)[len-1], RSTRING_LEN(tmp) == 0))
|
---|
2257 | mrb_ary_pop(mrb, result);
|
---|
2258 | }
|
---|
2259 |
|
---|
2260 | return result;
|
---|
2261 | }
|
---|
2262 |
|
---|
2263 | mrb_value
|
---|
2264 | mrb_str_len_to_inum(mrb_state *mrb, const char *str, mrb_int len, mrb_int base, int badcheck)
|
---|
2265 | {
|
---|
2266 | const char *p = str;
|
---|
2267 | const char *pend = str + len;
|
---|
2268 | char sign = 1;
|
---|
2269 | int c;
|
---|
2270 | uint64_t n = 0;
|
---|
2271 | mrb_int val;
|
---|
2272 |
|
---|
2273 | #define conv_digit(c) \
|
---|
2274 | (ISDIGIT(c) ? ((c) - '0') : \
|
---|
2275 | ISLOWER(c) ? ((c) - 'a' + 10) : \
|
---|
2276 | ISUPPER(c) ? ((c) - 'A' + 10) : \
|
---|
2277 | -1)
|
---|
2278 |
|
---|
2279 | if (!p) {
|
---|
2280 | if (badcheck) goto bad;
|
---|
2281 | return mrb_fixnum_value(0);
|
---|
2282 | }
|
---|
2283 | while (p<pend && ISSPACE(*p))
|
---|
2284 | p++;
|
---|
2285 |
|
---|
2286 | if (p[0] == '+') {
|
---|
2287 | p++;
|
---|
2288 | }
|
---|
2289 | else if (p[0] == '-') {
|
---|
2290 | p++;
|
---|
2291 | sign = 0;
|
---|
2292 | }
|
---|
2293 | if (base <= 0) {
|
---|
2294 | if (p[0] == '0') {
|
---|
2295 | switch (p[1]) {
|
---|
2296 | case 'x': case 'X':
|
---|
2297 | base = 16;
|
---|
2298 | break;
|
---|
2299 | case 'b': case 'B':
|
---|
2300 | base = 2;
|
---|
2301 | break;
|
---|
2302 | case 'o': case 'O':
|
---|
2303 | base = 8;
|
---|
2304 | break;
|
---|
2305 | case 'd': case 'D':
|
---|
2306 | base = 10;
|
---|
2307 | break;
|
---|
2308 | default:
|
---|
2309 | base = 8;
|
---|
2310 | break;
|
---|
2311 | }
|
---|
2312 | }
|
---|
2313 | else if (base < -1) {
|
---|
2314 | base = -base;
|
---|
2315 | }
|
---|
2316 | else {
|
---|
2317 | base = 10;
|
---|
2318 | }
|
---|
2319 | }
|
---|
2320 | switch (base) {
|
---|
2321 | case 2:
|
---|
2322 | if (p[0] == '0' && (p[1] == 'b'||p[1] == 'B')) {
|
---|
2323 | p += 2;
|
---|
2324 | }
|
---|
2325 | break;
|
---|
2326 | case 3:
|
---|
2327 | break;
|
---|
2328 | case 8:
|
---|
2329 | if (p[0] == '0' && (p[1] == 'o'||p[1] == 'O')) {
|
---|
2330 | p += 2;
|
---|
2331 | }
|
---|
2332 | case 4: case 5: case 6: case 7:
|
---|
2333 | break;
|
---|
2334 | case 10:
|
---|
2335 | if (p[0] == '0' && (p[1] == 'd'||p[1] == 'D')) {
|
---|
2336 | p += 2;
|
---|
2337 | }
|
---|
2338 | case 9: case 11: case 12: case 13: case 14: case 15:
|
---|
2339 | break;
|
---|
2340 | case 16:
|
---|
2341 | if (p[0] == '0' && (p[1] == 'x'||p[1] == 'X')) {
|
---|
2342 | p += 2;
|
---|
2343 | }
|
---|
2344 | break;
|
---|
2345 | default:
|
---|
2346 | if (base < 2 || 36 < base) {
|
---|
2347 | mrb_raisef(mrb, E_ARGUMENT_ERROR, "illegal radix %i", base);
|
---|
2348 | }
|
---|
2349 | break;
|
---|
2350 | } /* end of switch (base) { */
|
---|
2351 | if (p>=pend) {
|
---|
2352 | if (badcheck) goto bad;
|
---|
2353 | return mrb_fixnum_value(0);
|
---|
2354 | }
|
---|
2355 | if (*p == '0') { /* squeeze preceding 0s */
|
---|
2356 | p++;
|
---|
2357 | while (p<pend) {
|
---|
2358 | c = *p++;
|
---|
2359 | if (c == '_') {
|
---|
2360 | if (p<pend && *p == '_') {
|
---|
2361 | if (badcheck) goto bad;
|
---|
2362 | break;
|
---|
2363 | }
|
---|
2364 | continue;
|
---|
2365 | }
|
---|
2366 | if (c != '0') {
|
---|
2367 | p--;
|
---|
2368 | break;
|
---|
2369 | }
|
---|
2370 | }
|
---|
2371 | if (*(p - 1) == '0')
|
---|
2372 | p--;
|
---|
2373 | }
|
---|
2374 | if (p == pend || *p == '_') {
|
---|
2375 | if (badcheck) goto bad;
|
---|
2376 | return mrb_fixnum_value(0);
|
---|
2377 | }
|
---|
2378 | for ( ;p<pend;p++) {
|
---|
2379 | if (*p == '_') {
|
---|
2380 | p++;
|
---|
2381 | if (p==pend) {
|
---|
2382 | if (badcheck) goto bad;
|
---|
2383 | continue;
|
---|
2384 | }
|
---|
2385 | if (*p == '_') {
|
---|
2386 | if (badcheck) goto bad;
|
---|
2387 | break;
|
---|
2388 | }
|
---|
2389 | }
|
---|
2390 | if (badcheck && *p == '\0') {
|
---|
2391 | goto nullbyte;
|
---|
2392 | }
|
---|
2393 | c = conv_digit(*p);
|
---|
2394 | if (c < 0 || c >= base) {
|
---|
2395 | break;
|
---|
2396 | }
|
---|
2397 | n *= base;
|
---|
2398 | n += c;
|
---|
2399 | if (n > (uint64_t)MRB_INT_MAX + (sign ? 0 : 1)) {
|
---|
2400 | #ifndef MRB_WITHOUT_FLOAT
|
---|
2401 | if (base == 10) {
|
---|
2402 | return mrb_float_value(mrb, mrb_str_to_dbl(mrb, mrb_str_new(mrb, str, len), badcheck));
|
---|
2403 | }
|
---|
2404 | else
|
---|
2405 | #endif
|
---|
2406 | {
|
---|
2407 | mrb_raisef(mrb, E_RANGE_ERROR, "string (%l) too big for integer", str, pend-str);
|
---|
2408 | }
|
---|
2409 | }
|
---|
2410 | }
|
---|
2411 | val = (mrb_int)n;
|
---|
2412 | if (badcheck) {
|
---|
2413 | if (p == str) goto bad; /* no number */
|
---|
2414 | if (*(p - 1) == '_') goto bad; /* trailing '_' */
|
---|
2415 | while (p<pend && ISSPACE(*p)) p++;
|
---|
2416 | if (p<pend) goto bad; /* trailing garbage */
|
---|
2417 | }
|
---|
2418 |
|
---|
2419 | return mrb_fixnum_value(sign ? val : -val);
|
---|
2420 | nullbyte:
|
---|
2421 | mrb_raise(mrb, E_ARGUMENT_ERROR, "string contains null byte");
|
---|
2422 | /* not reached */
|
---|
2423 | bad:
|
---|
2424 | mrb_raisef(mrb, E_ARGUMENT_ERROR, "invalid string for number(%!l)", str, pend-str);
|
---|
2425 | /* not reached */
|
---|
2426 | return mrb_fixnum_value(0);
|
---|
2427 | }
|
---|
2428 |
|
---|
2429 | MRB_API mrb_value
|
---|
2430 | mrb_cstr_to_inum(mrb_state *mrb, const char *str, mrb_int base, mrb_bool badcheck)
|
---|
2431 | {
|
---|
2432 | return mrb_str_len_to_inum(mrb, str, strlen(str), base, badcheck);
|
---|
2433 | }
|
---|
2434 |
|
---|
2435 | /* obslete: use RSTRING_CSTR() or mrb_string_cstr() */
|
---|
2436 | MRB_API const char*
|
---|
2437 | mrb_string_value_cstr(mrb_state *mrb, mrb_value *ptr)
|
---|
2438 | {
|
---|
2439 | struct RString *ps;
|
---|
2440 | const char *p;
|
---|
2441 | mrb_int len;
|
---|
2442 |
|
---|
2443 | check_null_byte(mrb, *ptr);
|
---|
2444 | ps = mrb_str_ptr(*ptr);
|
---|
2445 | p = RSTR_PTR(ps);
|
---|
2446 | len = RSTR_LEN(ps);
|
---|
2447 | if (p[len] == '\0') {
|
---|
2448 | return p;
|
---|
2449 | }
|
---|
2450 |
|
---|
2451 | /*
|
---|
2452 | * Even after str_modify_keep_ascii(), NULL termination is not ensured if
|
---|
2453 | * RSTR_SET_LEN() is used explicitly (e.g. String#delete_suffix!).
|
---|
2454 | */
|
---|
2455 | str_modify_keep_ascii(mrb, ps);
|
---|
2456 | RSTR_PTR(ps)[len] = '\0';
|
---|
2457 | return RSTR_PTR(ps);
|
---|
2458 | }
|
---|
2459 |
|
---|
2460 | MRB_API const char*
|
---|
2461 | mrb_string_cstr(mrb_state *mrb, mrb_value str)
|
---|
2462 | {
|
---|
2463 | return mrb_string_value_cstr(mrb, &str);
|
---|
2464 | }
|
---|
2465 |
|
---|
2466 | MRB_API mrb_value
|
---|
2467 | mrb_str_to_inum(mrb_state *mrb, mrb_value str, mrb_int base, mrb_bool badcheck)
|
---|
2468 | {
|
---|
2469 | const char *s;
|
---|
2470 | mrb_int len;
|
---|
2471 |
|
---|
2472 | mrb_to_str(mrb, str);
|
---|
2473 | s = RSTRING_PTR(str);
|
---|
2474 | len = RSTRING_LEN(str);
|
---|
2475 | return mrb_str_len_to_inum(mrb, s, len, base, badcheck);
|
---|
2476 | }
|
---|
2477 |
|
---|
2478 | /* 15.2.10.5.38 */
|
---|
2479 | /*
|
---|
2480 | * call-seq:
|
---|
2481 | * str.to_i(base=10) => integer
|
---|
2482 | *
|
---|
2483 | * Returns the result of interpreting leading characters in <i>str</i> as an
|
---|
2484 | * integer base <i>base</i> (between 2 and 36). Extraneous characters past the
|
---|
2485 | * end of a valid number are ignored. If there is not a valid number at the
|
---|
2486 | * start of <i>str</i>, <code>0</code> is returned. This method never raises an
|
---|
2487 | * exception.
|
---|
2488 | *
|
---|
2489 | * "12345".to_i #=> 12345
|
---|
2490 | * "99 red balloons".to_i #=> 99
|
---|
2491 | * "0a".to_i #=> 0
|
---|
2492 | * "0a".to_i(16) #=> 10
|
---|
2493 | * "hello".to_i #=> 0
|
---|
2494 | * "1100101".to_i(2) #=> 101
|
---|
2495 | * "1100101".to_i(8) #=> 294977
|
---|
2496 | * "1100101".to_i(10) #=> 1100101
|
---|
2497 | * "1100101".to_i(16) #=> 17826049
|
---|
2498 | */
|
---|
2499 | static mrb_value
|
---|
2500 | mrb_str_to_i(mrb_state *mrb, mrb_value self)
|
---|
2501 | {
|
---|
2502 | mrb_int base = 10;
|
---|
2503 |
|
---|
2504 | mrb_get_args(mrb, "|i", &base);
|
---|
2505 | if (base < 0) {
|
---|
2506 | mrb_raisef(mrb, E_ARGUMENT_ERROR, "illegal radix %i", base);
|
---|
2507 | }
|
---|
2508 | return mrb_str_to_inum(mrb, self, base, FALSE);
|
---|
2509 | }
|
---|
2510 |
|
---|
2511 | #ifndef MRB_WITHOUT_FLOAT
|
---|
2512 | double
|
---|
2513 | mrb_str_len_to_dbl(mrb_state *mrb, const char *s, size_t len, mrb_bool badcheck)
|
---|
2514 | {
|
---|
2515 | char buf[DBL_DIG * 4 + 20];
|
---|
2516 | const char *p = s, *p2;
|
---|
2517 | const char *pend = p + len;
|
---|
2518 | char *end;
|
---|
2519 | char *n;
|
---|
2520 | char prev = 0;
|
---|
2521 | double d;
|
---|
2522 | mrb_bool dot = FALSE;
|
---|
2523 |
|
---|
2524 | if (!p) return 0.0;
|
---|
2525 | while (p<pend && ISSPACE(*p)) p++;
|
---|
2526 | p2 = p;
|
---|
2527 |
|
---|
2528 | if (pend - p > 2 && p[0] == '0' && (p[1] == 'x' || p[1] == 'X')) {
|
---|
2529 | mrb_value x;
|
---|
2530 |
|
---|
2531 | if (!badcheck) return 0.0;
|
---|
2532 | x = mrb_str_len_to_inum(mrb, p, pend-p, 0, badcheck);
|
---|
2533 | if (mrb_fixnum_p(x))
|
---|
2534 | d = (double)mrb_fixnum(x);
|
---|
2535 | else /* if (mrb_float_p(x)) */
|
---|
2536 | d = mrb_float(x);
|
---|
2537 | return d;
|
---|
2538 | }
|
---|
2539 | while (p < pend) {
|
---|
2540 | if (!*p) {
|
---|
2541 | if (badcheck) {
|
---|
2542 | mrb_raise(mrb, E_ARGUMENT_ERROR, "string for Float contains null byte");
|
---|
2543 | /* not reached */
|
---|
2544 | }
|
---|
2545 | pend = p;
|
---|
2546 | p = p2;
|
---|
2547 | goto nocopy;
|
---|
2548 | }
|
---|
2549 | if (!badcheck && *p == ' ') {
|
---|
2550 | pend = p;
|
---|
2551 | p = p2;
|
---|
2552 | goto nocopy;
|
---|
2553 | }
|
---|
2554 | if (*p == '_') break;
|
---|
2555 | p++;
|
---|
2556 | }
|
---|
2557 | p = p2;
|
---|
2558 | n = buf;
|
---|
2559 | while (p < pend) {
|
---|
2560 | char c = *p++;
|
---|
2561 | if (c == '.') dot = TRUE;
|
---|
2562 | if (c == '_') {
|
---|
2563 | /* remove an underscore between digits */
|
---|
2564 | if (n == buf || !ISDIGIT(prev) || p == pend) {
|
---|
2565 | if (badcheck) goto bad;
|
---|
2566 | break;
|
---|
2567 | }
|
---|
2568 | }
|
---|
2569 | else if (badcheck && prev == '_' && !ISDIGIT(c)) goto bad;
|
---|
2570 | else {
|
---|
2571 | const char *bend = buf+sizeof(buf)-1;
|
---|
2572 | if (n==bend) { /* buffer overflow */
|
---|
2573 | if (dot) break; /* cut off remaining fractions */
|
---|
2574 | return INFINITY;
|
---|
2575 | }
|
---|
2576 | *n++ = c;
|
---|
2577 | }
|
---|
2578 | prev = c;
|
---|
2579 | }
|
---|
2580 | *n = '\0';
|
---|
2581 | p = buf;
|
---|
2582 | pend = n;
|
---|
2583 | nocopy:
|
---|
2584 | d = mrb_float_read(p, &end);
|
---|
2585 | if (p == end) {
|
---|
2586 | if (badcheck) {
|
---|
2587 | bad:
|
---|
2588 | mrb_raisef(mrb, E_ARGUMENT_ERROR, "invalid string for float(%!s)", s);
|
---|
2589 | /* not reached */
|
---|
2590 | }
|
---|
2591 | return d;
|
---|
2592 | }
|
---|
2593 | if (badcheck) {
|
---|
2594 | if (!end || p == end) goto bad;
|
---|
2595 | while (end<pend && ISSPACE(*end)) end++;
|
---|
2596 | if (end<pend) goto bad;
|
---|
2597 | }
|
---|
2598 | return d;
|
---|
2599 | }
|
---|
2600 |
|
---|
2601 | MRB_API double
|
---|
2602 | mrb_cstr_to_dbl(mrb_state *mrb, const char *s, mrb_bool badcheck)
|
---|
2603 | {
|
---|
2604 | return mrb_str_len_to_dbl(mrb, s, strlen(s), badcheck);
|
---|
2605 | }
|
---|
2606 |
|
---|
2607 | MRB_API double
|
---|
2608 | mrb_str_to_dbl(mrb_state *mrb, mrb_value str, mrb_bool badcheck)
|
---|
2609 | {
|
---|
2610 | return mrb_str_len_to_dbl(mrb, RSTRING_PTR(str), RSTRING_LEN(str), badcheck);
|
---|
2611 | }
|
---|
2612 |
|
---|
2613 | /* 15.2.10.5.39 */
|
---|
2614 | /*
|
---|
2615 | * call-seq:
|
---|
2616 | * str.to_f => float
|
---|
2617 | *
|
---|
2618 | * Returns the result of interpreting leading characters in <i>str</i> as a
|
---|
2619 | * floating point number. Extraneous characters past the end of a valid number
|
---|
2620 | * are ignored. If there is not a valid number at the start of <i>str</i>,
|
---|
2621 | * <code>0.0</code> is returned. This method never raises an exception.
|
---|
2622 | *
|
---|
2623 | * "123.45e1".to_f #=> 1234.5
|
---|
2624 | * "45.67 degrees".to_f #=> 45.67
|
---|
2625 | * "thx1138".to_f #=> 0.0
|
---|
2626 | */
|
---|
2627 | static mrb_value
|
---|
2628 | mrb_str_to_f(mrb_state *mrb, mrb_value self)
|
---|
2629 | {
|
---|
2630 | return mrb_float_value(mrb, mrb_str_to_dbl(mrb, self, FALSE));
|
---|
2631 | }
|
---|
2632 | #endif
|
---|
2633 |
|
---|
2634 | /* 15.2.10.5.40 */
|
---|
2635 | /*
|
---|
2636 | * call-seq:
|
---|
2637 | * str.to_s => str
|
---|
2638 | *
|
---|
2639 | * Returns the receiver.
|
---|
2640 | */
|
---|
2641 | static mrb_value
|
---|
2642 | mrb_str_to_s(mrb_state *mrb, mrb_value self)
|
---|
2643 | {
|
---|
2644 | if (mrb_obj_class(mrb, self) != mrb->string_class) {
|
---|
2645 | return mrb_str_dup(mrb, self);
|
---|
2646 | }
|
---|
2647 | return self;
|
---|
2648 | }
|
---|
2649 |
|
---|
2650 | /* 15.2.10.5.43 */
|
---|
2651 | /*
|
---|
2652 | * call-seq:
|
---|
2653 | * str.upcase! => str or nil
|
---|
2654 | *
|
---|
2655 | * Upcases the contents of <i>str</i>, returning <code>nil</code> if no changes
|
---|
2656 | * were made.
|
---|
2657 | */
|
---|
2658 | static mrb_value
|
---|
2659 | mrb_str_upcase_bang(mrb_state *mrb, mrb_value str)
|
---|
2660 | {
|
---|
2661 | struct RString *s = mrb_str_ptr(str);
|
---|
2662 | char *p, *pend;
|
---|
2663 | mrb_bool modify = FALSE;
|
---|
2664 |
|
---|
2665 | mrb_str_modify_keep_ascii(mrb, s);
|
---|
2666 | p = RSTRING_PTR(str);
|
---|
2667 | pend = RSTRING_END(str);
|
---|
2668 | while (p < pend) {
|
---|
2669 | if (ISLOWER(*p)) {
|
---|
2670 | *p = TOUPPER(*p);
|
---|
2671 | modify = TRUE;
|
---|
2672 | }
|
---|
2673 | p++;
|
---|
2674 | }
|
---|
2675 |
|
---|
2676 | if (modify) return str;
|
---|
2677 | return mrb_nil_value();
|
---|
2678 | }
|
---|
2679 |
|
---|
2680 | /* 15.2.10.5.42 */
|
---|
2681 | /*
|
---|
2682 | * call-seq:
|
---|
2683 | * str.upcase => new_str
|
---|
2684 | *
|
---|
2685 | * Returns a copy of <i>str</i> with all lowercase letters replaced with their
|
---|
2686 | * uppercase counterparts. The operation is locale insensitive---only
|
---|
2687 | * characters 'a' to 'z' are affected.
|
---|
2688 | *
|
---|
2689 | * "hEllO".upcase #=> "HELLO"
|
---|
2690 | */
|
---|
2691 | static mrb_value
|
---|
2692 | mrb_str_upcase(mrb_state *mrb, mrb_value self)
|
---|
2693 | {
|
---|
2694 | mrb_value str;
|
---|
2695 |
|
---|
2696 | str = mrb_str_dup(mrb, self);
|
---|
2697 | mrb_str_upcase_bang(mrb, str);
|
---|
2698 | return str;
|
---|
2699 | }
|
---|
2700 |
|
---|
2701 | /*
|
---|
2702 | * call-seq:
|
---|
2703 | * str.dump -> new_str
|
---|
2704 | *
|
---|
2705 | * Produces a version of <i>str</i> with all nonprinting characters replaced by
|
---|
2706 | * <code>\nnn</code> notation and all special characters escaped.
|
---|
2707 | */
|
---|
2708 | mrb_value
|
---|
2709 | mrb_str_dump(mrb_state *mrb, mrb_value str)
|
---|
2710 | {
|
---|
2711 | return str_escape(mrb, str, FALSE);
|
---|
2712 | }
|
---|
2713 |
|
---|
2714 | MRB_API mrb_value
|
---|
2715 | mrb_str_cat(mrb_state *mrb, mrb_value str, const char *ptr, size_t len)
|
---|
2716 | {
|
---|
2717 | struct RString *s = mrb_str_ptr(str);
|
---|
2718 | size_t capa;
|
---|
2719 | size_t total;
|
---|
2720 | ptrdiff_t off = -1;
|
---|
2721 |
|
---|
2722 | if (len == 0) return str;
|
---|
2723 | mrb_str_modify(mrb, s);
|
---|
2724 | if (ptr >= RSTR_PTR(s) && ptr <= RSTR_PTR(s) + (size_t)RSTR_LEN(s)) {
|
---|
2725 | off = ptr - RSTR_PTR(s);
|
---|
2726 | }
|
---|
2727 |
|
---|
2728 | capa = RSTR_CAPA(s);
|
---|
2729 | total = RSTR_LEN(s)+len;
|
---|
2730 | if (total >= MRB_SSIZE_MAX) {
|
---|
2731 | size_error:
|
---|
2732 | mrb_raise(mrb, E_ARGUMENT_ERROR, "string size too big");
|
---|
2733 | }
|
---|
2734 | if (capa <= total) {
|
---|
2735 | if (capa == 0) capa = 1;
|
---|
2736 | while (capa <= total) {
|
---|
2737 | if (capa <= MRB_SSIZE_MAX / 2) {
|
---|
2738 | capa *= 2;
|
---|
2739 | }
|
---|
2740 | else {
|
---|
2741 | capa = total+1;
|
---|
2742 | }
|
---|
2743 | }
|
---|
2744 | if (capa <= total || capa > MRB_SSIZE_MAX) {
|
---|
2745 | goto size_error;
|
---|
2746 | }
|
---|
2747 | resize_capa(mrb, s, capa);
|
---|
2748 | }
|
---|
2749 | if (off != -1) {
|
---|
2750 | ptr = RSTR_PTR(s) + off;
|
---|
2751 | }
|
---|
2752 | memcpy(RSTR_PTR(s) + RSTR_LEN(s), ptr, len);
|
---|
2753 | mrb_assert_int_fit(size_t, total, mrb_ssize, MRB_SSIZE_MAX);
|
---|
2754 | RSTR_SET_LEN(s, total);
|
---|
2755 | RSTR_PTR(s)[total] = '\0'; /* sentinel */
|
---|
2756 | return str;
|
---|
2757 | }
|
---|
2758 |
|
---|
2759 | MRB_API mrb_value
|
---|
2760 | mrb_str_cat_cstr(mrb_state *mrb, mrb_value str, const char *ptr)
|
---|
2761 | {
|
---|
2762 | return mrb_str_cat(mrb, str, ptr, strlen(ptr));
|
---|
2763 | }
|
---|
2764 |
|
---|
2765 | MRB_API mrb_value
|
---|
2766 | mrb_str_cat_str(mrb_state *mrb, mrb_value str, mrb_value str2)
|
---|
2767 | {
|
---|
2768 | if (mrb_str_ptr(str) == mrb_str_ptr(str2)) {
|
---|
2769 | mrb_str_modify(mrb, mrb_str_ptr(str));
|
---|
2770 | }
|
---|
2771 | return mrb_str_cat(mrb, str, RSTRING_PTR(str2), RSTRING_LEN(str2));
|
---|
2772 | }
|
---|
2773 |
|
---|
2774 | MRB_API mrb_value
|
---|
2775 | mrb_str_append(mrb_state *mrb, mrb_value str1, mrb_value str2)
|
---|
2776 | {
|
---|
2777 | mrb_to_str(mrb, str2);
|
---|
2778 | return mrb_str_cat_str(mrb, str1, str2);
|
---|
2779 | }
|
---|
2780 |
|
---|
2781 | /*
|
---|
2782 | * call-seq:
|
---|
2783 | * str.inspect -> string
|
---|
2784 | *
|
---|
2785 | * Returns a printable version of _str_, surrounded by quote marks,
|
---|
2786 | * with special characters escaped.
|
---|
2787 | *
|
---|
2788 | * str = "hello"
|
---|
2789 | * str[3] = "\b"
|
---|
2790 | * str.inspect #=> "\"hel\\bo\""
|
---|
2791 | */
|
---|
2792 | mrb_value
|
---|
2793 | mrb_str_inspect(mrb_state *mrb, mrb_value str)
|
---|
2794 | {
|
---|
2795 | return str_escape(mrb, str, TRUE);
|
---|
2796 | }
|
---|
2797 |
|
---|
2798 | /*
|
---|
2799 | * call-seq:
|
---|
2800 | * str.bytes -> array of fixnums
|
---|
2801 | *
|
---|
2802 | * Returns an array of bytes in _str_.
|
---|
2803 | *
|
---|
2804 | * str = "hello"
|
---|
2805 | * str.bytes #=> [104, 101, 108, 108, 111]
|
---|
2806 | */
|
---|
2807 | static mrb_value
|
---|
2808 | mrb_str_bytes(mrb_state *mrb, mrb_value str)
|
---|
2809 | {
|
---|
2810 | struct RString *s = mrb_str_ptr(str);
|
---|
2811 | mrb_value a = mrb_ary_new_capa(mrb, RSTR_LEN(s));
|
---|
2812 | unsigned char *p = (unsigned char *)(RSTR_PTR(s)), *pend = p + RSTR_LEN(s);
|
---|
2813 |
|
---|
2814 | while (p < pend) {
|
---|
2815 | mrb_ary_push(mrb, a, mrb_fixnum_value(p[0]));
|
---|
2816 | p++;
|
---|
2817 | }
|
---|
2818 | return a;
|
---|
2819 | }
|
---|
2820 |
|
---|
2821 | /*
|
---|
2822 | * call-seq:
|
---|
2823 | * str.getbyte(index) -> 0 .. 255
|
---|
2824 | *
|
---|
2825 | * returns the <i>index</i>th byte as an integer.
|
---|
2826 | */
|
---|
2827 | static mrb_value
|
---|
2828 | mrb_str_getbyte(mrb_state *mrb, mrb_value str)
|
---|
2829 | {
|
---|
2830 | mrb_int pos;
|
---|
2831 | mrb_get_args(mrb, "i", &pos);
|
---|
2832 |
|
---|
2833 | if (pos < 0)
|
---|
2834 | pos += RSTRING_LEN(str);
|
---|
2835 | if (pos < 0 || RSTRING_LEN(str) <= pos)
|
---|
2836 | return mrb_nil_value();
|
---|
2837 |
|
---|
2838 | return mrb_fixnum_value((unsigned char)RSTRING_PTR(str)[pos]);
|
---|
2839 | }
|
---|
2840 |
|
---|
2841 | /*
|
---|
2842 | * call-seq:
|
---|
2843 | * str.setbyte(index, integer) -> integer
|
---|
2844 | *
|
---|
2845 | * modifies the <i>index</i>th byte as <i>integer</i>.
|
---|
2846 | */
|
---|
2847 | static mrb_value
|
---|
2848 | mrb_str_setbyte(mrb_state *mrb, mrb_value str)
|
---|
2849 | {
|
---|
2850 | mrb_int pos, byte;
|
---|
2851 | mrb_int len;
|
---|
2852 |
|
---|
2853 | mrb_get_args(mrb, "ii", &pos, &byte);
|
---|
2854 |
|
---|
2855 | len = RSTRING_LEN(str);
|
---|
2856 | if (pos < -len || len <= pos)
|
---|
2857 | mrb_raisef(mrb, E_INDEX_ERROR, "index %i out of string", pos);
|
---|
2858 | if (pos < 0)
|
---|
2859 | pos += len;
|
---|
2860 |
|
---|
2861 | mrb_str_modify(mrb, mrb_str_ptr(str));
|
---|
2862 | byte &= 0xff;
|
---|
2863 | RSTRING_PTR(str)[pos] = (unsigned char)byte;
|
---|
2864 | return mrb_fixnum_value((unsigned char)byte);
|
---|
2865 | }
|
---|
2866 |
|
---|
2867 | /*
|
---|
2868 | * call-seq:
|
---|
2869 | * str.byteslice(integer) -> new_str or nil
|
---|
2870 | * str.byteslice(integer, integer) -> new_str or nil
|
---|
2871 | * str.byteslice(range) -> new_str or nil
|
---|
2872 | *
|
---|
2873 | * Byte Reference---If passed a single Integer, returns a
|
---|
2874 | * substring of one byte at that position. If passed two Integer
|
---|
2875 | * objects, returns a substring starting at the offset given by the first, and
|
---|
2876 | * a length given by the second. If given a Range, a substring containing
|
---|
2877 | * bytes at offsets given by the range is returned. In all three cases, if
|
---|
2878 | * an offset is negative, it is counted from the end of <i>str</i>. Returns
|
---|
2879 | * <code>nil</code> if the initial offset falls outside the string, the length
|
---|
2880 | * is negative, or the beginning of the range is greater than the end.
|
---|
2881 | * The encoding of the resulted string keeps original encoding.
|
---|
2882 | *
|
---|
2883 | * "hello".byteslice(1) #=> "e"
|
---|
2884 | * "hello".byteslice(-1) #=> "o"
|
---|
2885 | * "hello".byteslice(1, 2) #=> "el"
|
---|
2886 | * "\x80\u3042".byteslice(1, 3) #=> "\u3042"
|
---|
2887 | * "\x03\u3042\xff".byteslice(1..3) #=> "\u3042"
|
---|
2888 | */
|
---|
2889 | static mrb_value
|
---|
2890 | mrb_str_byteslice(mrb_state *mrb, mrb_value str)
|
---|
2891 | {
|
---|
2892 | mrb_value a1, a2;
|
---|
2893 | mrb_int str_len = RSTRING_LEN(str), beg, len;
|
---|
2894 | mrb_bool empty = TRUE;
|
---|
2895 |
|
---|
2896 | if (mrb_get_args(mrb, "o|o", &a1, &a2) == 2) {
|
---|
2897 | beg = mrb_fixnum(mrb_to_int(mrb, a1));
|
---|
2898 | len = mrb_fixnum(mrb_to_int(mrb, a2));
|
---|
2899 | }
|
---|
2900 | else if (mrb_range_p(a1)) {
|
---|
2901 | if (mrb_range_beg_len(mrb, a1, &beg, &len, str_len, TRUE) != MRB_RANGE_OK) {
|
---|
2902 | return mrb_nil_value();
|
---|
2903 | }
|
---|
2904 | }
|
---|
2905 | else {
|
---|
2906 | beg = mrb_fixnum(mrb_to_int(mrb, a1));
|
---|
2907 | len = 1;
|
---|
2908 | empty = FALSE;
|
---|
2909 | }
|
---|
2910 |
|
---|
2911 | if (mrb_str_beg_len(str_len, &beg, &len) && (empty || len != 0)) {
|
---|
2912 | return mrb_str_byte_subseq(mrb, str, beg, len);
|
---|
2913 | }
|
---|
2914 | else {
|
---|
2915 | return mrb_nil_value();
|
---|
2916 | }
|
---|
2917 | }
|
---|
2918 |
|
---|
2919 | /* ---------------------------*/
|
---|
2920 | void
|
---|
2921 | mrb_init_string(mrb_state *mrb)
|
---|
2922 | {
|
---|
2923 | struct RClass *s;
|
---|
2924 |
|
---|
2925 | mrb_static_assert(RSTRING_EMBED_LEN_MAX < (1 << MRB_STR_EMBED_LEN_BIT),
|
---|
2926 | "pointer size too big for embedded string");
|
---|
2927 |
|
---|
2928 | mrb->string_class = s = mrb_define_class(mrb, "String", mrb->object_class); /* 15.2.10 */
|
---|
2929 | MRB_SET_INSTANCE_TT(s, MRB_TT_STRING);
|
---|
2930 |
|
---|
2931 | mrb_define_method(mrb, s, "bytesize", mrb_str_bytesize, MRB_ARGS_NONE());
|
---|
2932 |
|
---|
2933 | mrb_define_method(mrb, s, "<=>", mrb_str_cmp_m, MRB_ARGS_REQ(1)); /* 15.2.10.5.1 */
|
---|
2934 | mrb_define_method(mrb, s, "==", mrb_str_equal_m, MRB_ARGS_REQ(1)); /* 15.2.10.5.2 */
|
---|
2935 | mrb_define_method(mrb, s, "+", mrb_str_plus_m, MRB_ARGS_REQ(1)); /* 15.2.10.5.4 */
|
---|
2936 | mrb_define_method(mrb, s, "*", mrb_str_times, MRB_ARGS_REQ(1)); /* 15.2.10.5.5 */
|
---|
2937 | mrb_define_method(mrb, s, "[]", mrb_str_aref_m, MRB_ARGS_ANY()); /* 15.2.10.5.6 */
|
---|
2938 | mrb_define_method(mrb, s, "[]=", mrb_str_aset_m, MRB_ARGS_ANY());
|
---|
2939 | mrb_define_method(mrb, s, "capitalize", mrb_str_capitalize, MRB_ARGS_NONE()); /* 15.2.10.5.7 */
|
---|
2940 | mrb_define_method(mrb, s, "capitalize!", mrb_str_capitalize_bang, MRB_ARGS_NONE()); /* 15.2.10.5.8 */
|
---|
2941 | mrb_define_method(mrb, s, "chomp", mrb_str_chomp, MRB_ARGS_ANY()); /* 15.2.10.5.9 */
|
---|
2942 | mrb_define_method(mrb, s, "chomp!", mrb_str_chomp_bang, MRB_ARGS_ANY()); /* 15.2.10.5.10 */
|
---|
2943 | mrb_define_method(mrb, s, "chop", mrb_str_chop, MRB_ARGS_NONE()); /* 15.2.10.5.11 */
|
---|
2944 | mrb_define_method(mrb, s, "chop!", mrb_str_chop_bang, MRB_ARGS_NONE()); /* 15.2.10.5.12 */
|
---|
2945 | mrb_define_method(mrb, s, "downcase", mrb_str_downcase, MRB_ARGS_NONE()); /* 15.2.10.5.13 */
|
---|
2946 | mrb_define_method(mrb, s, "downcase!", mrb_str_downcase_bang, MRB_ARGS_NONE()); /* 15.2.10.5.14 */
|
---|
2947 | mrb_define_method(mrb, s, "empty?", mrb_str_empty_p, MRB_ARGS_NONE()); /* 15.2.10.5.16 */
|
---|
2948 | mrb_define_method(mrb, s, "eql?", mrb_str_eql, MRB_ARGS_REQ(1)); /* 15.2.10.5.17 */
|
---|
2949 |
|
---|
2950 | mrb_define_method(mrb, s, "hash", mrb_str_hash_m, MRB_ARGS_NONE()); /* 15.2.10.5.20 */
|
---|
2951 | mrb_define_method(mrb, s, "include?", mrb_str_include, MRB_ARGS_REQ(1)); /* 15.2.10.5.21 */
|
---|
2952 | mrb_define_method(mrb, s, "index", mrb_str_index_m, MRB_ARGS_ARG(1,1)); /* 15.2.10.5.22 */
|
---|
2953 | mrb_define_method(mrb, s, "initialize", mrb_str_init, MRB_ARGS_REQ(1)); /* 15.2.10.5.23 */
|
---|
2954 | mrb_define_method(mrb, s, "initialize_copy", mrb_str_replace, MRB_ARGS_REQ(1)); /* 15.2.10.5.24 */
|
---|
2955 | mrb_define_method(mrb, s, "intern", mrb_str_intern, MRB_ARGS_NONE()); /* 15.2.10.5.25 */
|
---|
2956 | mrb_define_method(mrb, s, "length", mrb_str_size, MRB_ARGS_NONE()); /* 15.2.10.5.26 */
|
---|
2957 | mrb_define_method(mrb, s, "replace", mrb_str_replace, MRB_ARGS_REQ(1)); /* 15.2.10.5.28 */
|
---|
2958 | mrb_define_method(mrb, s, "reverse", mrb_str_reverse, MRB_ARGS_NONE()); /* 15.2.10.5.29 */
|
---|
2959 | mrb_define_method(mrb, s, "reverse!", mrb_str_reverse_bang, MRB_ARGS_NONE()); /* 15.2.10.5.30 */
|
---|
2960 | mrb_define_method(mrb, s, "rindex", mrb_str_rindex, MRB_ARGS_ANY()); /* 15.2.10.5.31 */
|
---|
2961 | mrb_define_method(mrb, s, "size", mrb_str_size, MRB_ARGS_NONE()); /* 15.2.10.5.33 */
|
---|
2962 | mrb_define_method(mrb, s, "slice", mrb_str_aref_m, MRB_ARGS_ANY()); /* 15.2.10.5.34 */
|
---|
2963 | mrb_define_method(mrb, s, "split", mrb_str_split_m, MRB_ARGS_ANY()); /* 15.2.10.5.35 */
|
---|
2964 |
|
---|
2965 | #ifndef MRB_WITHOUT_FLOAT
|
---|
2966 | mrb_define_method(mrb, s, "to_f", mrb_str_to_f, MRB_ARGS_NONE()); /* 15.2.10.5.38 */
|
---|
2967 | #endif
|
---|
2968 | mrb_define_method(mrb, s, "to_i", mrb_str_to_i, MRB_ARGS_ANY()); /* 15.2.10.5.39 */
|
---|
2969 | mrb_define_method(mrb, s, "to_s", mrb_str_to_s, MRB_ARGS_NONE()); /* 15.2.10.5.40 */
|
---|
2970 | mrb_define_method(mrb, s, "to_str", mrb_str_to_s, MRB_ARGS_NONE());
|
---|
2971 | mrb_define_method(mrb, s, "to_sym", mrb_str_intern, MRB_ARGS_NONE()); /* 15.2.10.5.41 */
|
---|
2972 | mrb_define_method(mrb, s, "upcase", mrb_str_upcase, MRB_ARGS_NONE()); /* 15.2.10.5.42 */
|
---|
2973 | mrb_define_method(mrb, s, "upcase!", mrb_str_upcase_bang, MRB_ARGS_NONE()); /* 15.2.10.5.43 */
|
---|
2974 | mrb_define_method(mrb, s, "inspect", mrb_str_inspect, MRB_ARGS_NONE()); /* 15.2.10.5.46(x) */
|
---|
2975 | mrb_define_method(mrb, s, "bytes", mrb_str_bytes, MRB_ARGS_NONE());
|
---|
2976 |
|
---|
2977 | mrb_define_method(mrb, s, "getbyte", mrb_str_getbyte, MRB_ARGS_REQ(1));
|
---|
2978 | mrb_define_method(mrb, s, "setbyte", mrb_str_setbyte, MRB_ARGS_REQ(2));
|
---|
2979 | mrb_define_method(mrb, s, "byteslice", mrb_str_byteslice, MRB_ARGS_ARG(1,1));
|
---|
2980 | }
|
---|
2981 |
|
---|
2982 | #ifndef MRB_WITHOUT_FLOAT
|
---|
2983 | /*
|
---|
2984 | * Source code for the "strtod" library procedure.
|
---|
2985 | *
|
---|
2986 | * Copyright (c) 1988-1993 The Regents of the University of California.
|
---|
2987 | * Copyright (c) 1994 Sun Microsystems, Inc.
|
---|
2988 | *
|
---|
2989 | * Permission to use, copy, modify, and distribute this
|
---|
2990 | * software and its documentation for any purpose and without
|
---|
2991 | * fee is hereby granted, provided that the above copyright
|
---|
2992 | * notice appear in all copies. The University of California
|
---|
2993 | * makes no representations about the suitability of this
|
---|
2994 | * software for any purpose. It is provided "as is" without
|
---|
2995 | * express or implied warranty.
|
---|
2996 | *
|
---|
2997 | * RCS: @(#) $Id$
|
---|
2998 | */
|
---|
2999 |
|
---|
3000 | #include <ctype.h>
|
---|
3001 | #include <errno.h>
|
---|
3002 |
|
---|
3003 | static const int maxExponent = 511; /* Largest possible base 10 exponent. Any
|
---|
3004 | * exponent larger than this will already
|
---|
3005 | * produce underflow or overflow, so there's
|
---|
3006 | * no need to worry about additional digits.
|
---|
3007 | */
|
---|
3008 | static const double powersOf10[] = {/* Table giving binary powers of 10. Entry */
|
---|
3009 | 10., /* is 10^2^i. Used to convert decimal */
|
---|
3010 | 100., /* exponents into floating-point numbers. */
|
---|
3011 | 1.0e4,
|
---|
3012 | 1.0e8,
|
---|
3013 | 1.0e16,
|
---|
3014 | 1.0e32,
|
---|
3015 | 1.0e64,
|
---|
3016 | 1.0e128,
|
---|
3017 | 1.0e256
|
---|
3018 | };
|
---|
3019 |
|
---|
3020 | MRB_API double
|
---|
3021 | mrb_float_read(const char *string, char **endPtr)
|
---|
3022 | /* const char *string; A decimal ASCII floating-point number,
|
---|
3023 | * optionally preceded by white space.
|
---|
3024 | * Must have form "-I.FE-X", where I is the
|
---|
3025 | * integer part of the mantissa, F is the
|
---|
3026 | * fractional part of the mantissa, and X
|
---|
3027 | * is the exponent. Either of the signs
|
---|
3028 | * may be "+", "-", or omitted. Either I
|
---|
3029 | * or F may be omitted, or both. The decimal
|
---|
3030 | * point isn't necessary unless F is present.
|
---|
3031 | * The "E" may actually be an "e". E and X
|
---|
3032 | * may both be omitted (but not just one).
|
---|
3033 | */
|
---|
3034 | /* char **endPtr; If non-NULL, store terminating character's
|
---|
3035 | * address here. */
|
---|
3036 | {
|
---|
3037 | int sign, expSign = FALSE;
|
---|
3038 | double fraction, dblExp;
|
---|
3039 | const double *d;
|
---|
3040 | const char *p;
|
---|
3041 | int c;
|
---|
3042 | int exp = 0; /* Exponent read from "EX" field. */
|
---|
3043 | int fracExp = 0; /* Exponent that derives from the fractional
|
---|
3044 | * part. Under normal circumstatnces, it is
|
---|
3045 | * the negative of the number of digits in F.
|
---|
3046 | * However, if I is very long, the last digits
|
---|
3047 | * of I get dropped (otherwise a long I with a
|
---|
3048 | * large negative exponent could cause an
|
---|
3049 | * unnecessary overflow on I alone). In this
|
---|
3050 | * case, fracExp is incremented one for each
|
---|
3051 | * dropped digit. */
|
---|
3052 | int mantSize; /* Number of digits in mantissa. */
|
---|
3053 | int decPt; /* Number of mantissa digits BEFORE decimal
|
---|
3054 | * point. */
|
---|
3055 | const char *pExp; /* Temporarily holds location of exponent
|
---|
3056 | * in string. */
|
---|
3057 |
|
---|
3058 | /*
|
---|
3059 | * Strip off leading blanks and check for a sign.
|
---|
3060 | */
|
---|
3061 |
|
---|
3062 | p = string;
|
---|
3063 | while (ISSPACE(*p)) {
|
---|
3064 | p += 1;
|
---|
3065 | }
|
---|
3066 | if (*p == '-') {
|
---|
3067 | sign = TRUE;
|
---|
3068 | p += 1;
|
---|
3069 | }
|
---|
3070 | else {
|
---|
3071 | if (*p == '+') {
|
---|
3072 | p += 1;
|
---|
3073 | }
|
---|
3074 | sign = FALSE;
|
---|
3075 | }
|
---|
3076 |
|
---|
3077 | /*
|
---|
3078 | * Count the number of digits in the mantissa (including the decimal
|
---|
3079 | * point), and also locate the decimal point.
|
---|
3080 | */
|
---|
3081 |
|
---|
3082 | decPt = -1;
|
---|
3083 | for (mantSize = 0; ; mantSize += 1)
|
---|
3084 | {
|
---|
3085 | c = *p;
|
---|
3086 | if (!ISDIGIT(c)) {
|
---|
3087 | if ((c != '.') || (decPt >= 0)) {
|
---|
3088 | break;
|
---|
3089 | }
|
---|
3090 | decPt = mantSize;
|
---|
3091 | }
|
---|
3092 | p += 1;
|
---|
3093 | }
|
---|
3094 |
|
---|
3095 | /*
|
---|
3096 | * Now suck up the digits in the mantissa. Use two integers to
|
---|
3097 | * collect 9 digits each (this is faster than using floating-point).
|
---|
3098 | * If the mantissa has more than 18 digits, ignore the extras, since
|
---|
3099 | * they can't affect the value anyway.
|
---|
3100 | */
|
---|
3101 |
|
---|
3102 | pExp = p;
|
---|
3103 | p -= mantSize;
|
---|
3104 | if (decPt < 0) {
|
---|
3105 | decPt = mantSize;
|
---|
3106 | }
|
---|
3107 | else {
|
---|
3108 | mantSize -= 1; /* One of the digits was the point. */
|
---|
3109 | }
|
---|
3110 | if (mantSize > 18) {
|
---|
3111 | if (decPt - 18 > 29999) {
|
---|
3112 | fracExp = 29999;
|
---|
3113 | }
|
---|
3114 | else {
|
---|
3115 | fracExp = decPt - 18;
|
---|
3116 | }
|
---|
3117 | mantSize = 18;
|
---|
3118 | }
|
---|
3119 | else {
|
---|
3120 | fracExp = decPt - mantSize;
|
---|
3121 | }
|
---|
3122 | if (mantSize == 0) {
|
---|
3123 | fraction = 0.0;
|
---|
3124 | p = string;
|
---|
3125 | goto done;
|
---|
3126 | }
|
---|
3127 | else {
|
---|
3128 | int frac1, frac2;
|
---|
3129 | frac1 = 0;
|
---|
3130 | for ( ; mantSize > 9; mantSize -= 1)
|
---|
3131 | {
|
---|
3132 | c = *p;
|
---|
3133 | p += 1;
|
---|
3134 | if (c == '.') {
|
---|
3135 | c = *p;
|
---|
3136 | p += 1;
|
---|
3137 | }
|
---|
3138 | frac1 = 10*frac1 + (c - '0');
|
---|
3139 | }
|
---|
3140 | frac2 = 0;
|
---|
3141 | for (; mantSize > 0; mantSize -= 1)
|
---|
3142 | {
|
---|
3143 | c = *p;
|
---|
3144 | p += 1;
|
---|
3145 | if (c == '.') {
|
---|
3146 | c = *p;
|
---|
3147 | p += 1;
|
---|
3148 | }
|
---|
3149 | frac2 = 10*frac2 + (c - '0');
|
---|
3150 | }
|
---|
3151 | fraction = (1.0e9 * frac1) + frac2;
|
---|
3152 | }
|
---|
3153 |
|
---|
3154 | /*
|
---|
3155 | * Skim off the exponent.
|
---|
3156 | */
|
---|
3157 |
|
---|
3158 | p = pExp;
|
---|
3159 | if ((*p == 'E') || (*p == 'e')) {
|
---|
3160 | p += 1;
|
---|
3161 | if (*p == '-') {
|
---|
3162 | expSign = TRUE;
|
---|
3163 | p += 1;
|
---|
3164 | }
|
---|
3165 | else {
|
---|
3166 | if (*p == '+') {
|
---|
3167 | p += 1;
|
---|
3168 | }
|
---|
3169 | expSign = FALSE;
|
---|
3170 | }
|
---|
3171 | while (ISDIGIT(*p)) {
|
---|
3172 | exp = exp * 10 + (*p - '0');
|
---|
3173 | if (exp > 19999) {
|
---|
3174 | exp = 19999;
|
---|
3175 | }
|
---|
3176 | p += 1;
|
---|
3177 | }
|
---|
3178 | }
|
---|
3179 | if (expSign) {
|
---|
3180 | exp = fracExp - exp;
|
---|
3181 | }
|
---|
3182 | else {
|
---|
3183 | exp = fracExp + exp;
|
---|
3184 | }
|
---|
3185 |
|
---|
3186 | /*
|
---|
3187 | * Generate a floating-point number that represents the exponent.
|
---|
3188 | * Do this by processing the exponent one bit at a time to combine
|
---|
3189 | * many powers of 2 of 10. Then combine the exponent with the
|
---|
3190 | * fraction.
|
---|
3191 | */
|
---|
3192 |
|
---|
3193 | if (exp < 0) {
|
---|
3194 | expSign = TRUE;
|
---|
3195 | exp = -exp;
|
---|
3196 | }
|
---|
3197 | else {
|
---|
3198 | expSign = FALSE;
|
---|
3199 | }
|
---|
3200 | if (exp > maxExponent) {
|
---|
3201 | exp = maxExponent;
|
---|
3202 | errno = ERANGE;
|
---|
3203 | }
|
---|
3204 | dblExp = 1.0;
|
---|
3205 | for (d = powersOf10; exp != 0; exp >>= 1, d += 1) {
|
---|
3206 | if (exp & 01) {
|
---|
3207 | dblExp *= *d;
|
---|
3208 | }
|
---|
3209 | }
|
---|
3210 | if (expSign) {
|
---|
3211 | fraction /= dblExp;
|
---|
3212 | }
|
---|
3213 | else {
|
---|
3214 | fraction *= dblExp;
|
---|
3215 | }
|
---|
3216 |
|
---|
3217 | done:
|
---|
3218 | if (endPtr != NULL) {
|
---|
3219 | *endPtr = (char *) p;
|
---|
3220 | }
|
---|
3221 |
|
---|
3222 | if (sign) {
|
---|
3223 | return -fraction;
|
---|
3224 | }
|
---|
3225 | return fraction;
|
---|
3226 | }
|
---|
3227 | #endif
|
---|