1 | #include <string.h>
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2 | #include "mruby.h"
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3 | #include "mruby/array.h"
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4 | #include "mruby/class.h"
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5 | #include "mruby/string.h"
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6 | #include "mruby/range.h"
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7 |
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8 | static mrb_value
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9 | mrb_str_getbyte(mrb_state *mrb, mrb_value str)
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10 | {
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11 | mrb_int pos;
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12 | mrb_get_args(mrb, "i", &pos);
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13 |
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14 | if (pos < 0)
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15 | pos += RSTRING_LEN(str);
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16 | if (pos < 0 || RSTRING_LEN(str) <= pos)
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17 | return mrb_nil_value();
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18 |
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19 | return mrb_fixnum_value((unsigned char)RSTRING_PTR(str)[pos]);
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20 | }
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21 |
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22 | static mrb_value
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23 | mrb_str_setbyte(mrb_state *mrb, mrb_value str)
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24 | {
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25 | mrb_int pos, byte;
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26 | long len = RSTRING_LEN(str);
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27 |
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28 | mrb_get_args(mrb, "ii", &pos, &byte);
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29 |
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30 | if (pos < -len || len <= pos)
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31 | mrb_raisef(mrb, E_INDEX_ERROR, "index %S is out of array", mrb_fixnum_value(pos));
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32 | if (pos < 0)
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33 | pos += len;
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34 |
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35 | mrb_str_modify(mrb, mrb_str_ptr(str));
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36 | byte &= 0xff;
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37 | RSTRING_PTR(str)[pos] = byte;
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38 | return mrb_fixnum_value((unsigned char)byte);
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39 | }
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40 |
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41 | static mrb_value
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42 | mrb_str_byteslice(mrb_state *mrb, mrb_value str)
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43 | {
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44 | mrb_value a1;
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45 | mrb_int len;
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46 | int argc;
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47 |
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48 | argc = mrb_get_args(mrb, "o|i", &a1, &len);
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49 | if (argc == 2) {
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50 | return mrb_str_substr(mrb, str, mrb_fixnum(a1), len);
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51 | }
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52 | switch (mrb_type(a1)) {
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53 | case MRB_TT_RANGE:
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54 | {
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55 | mrb_int beg;
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56 |
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57 | len = RSTRING_LEN(str);
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58 | if (mrb_range_beg_len(mrb, a1, &beg, &len, len)) {
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59 | return mrb_str_substr(mrb, str, beg, len);
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60 | }
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61 | return mrb_nil_value();
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62 | }
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63 | case MRB_TT_FLOAT:
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64 | a1 = mrb_fixnum_value((mrb_int)mrb_float(a1));
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65 | /* fall through */
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66 | case MRB_TT_FIXNUM:
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67 | return mrb_str_substr(mrb, str, mrb_fixnum(a1), 1);
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68 | default:
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69 | mrb_raise(mrb, E_TYPE_ERROR, "wrong type of argument");
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70 | }
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71 | /* not reached */
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72 | return mrb_nil_value();
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73 | }
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74 |
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75 | /*
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76 | * call-seq:
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77 | * str.swapcase! -> str or nil
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78 | *
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79 | * Equivalent to <code>String#swapcase</code>, but modifies the receiver in
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80 | * place, returning <i>str</i>, or <code>nil</code> if no changes were made.
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81 | * Note: case conversion is effective only in ASCII region.
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82 | */
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83 | static mrb_value
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84 | mrb_str_swapcase_bang(mrb_state *mrb, mrb_value str)
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85 | {
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86 | char *p, *pend;
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87 | int modify = 0;
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88 | struct RString *s = mrb_str_ptr(str);
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89 |
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90 | mrb_str_modify(mrb, s);
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91 | p = RSTRING_PTR(str);
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92 | pend = p + RSTRING_LEN(str);
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93 | while (p < pend) {
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94 | if (ISUPPER(*p)) {
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95 | *p = TOLOWER(*p);
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96 | modify = 1;
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97 | }
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98 | else if (ISLOWER(*p)) {
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99 | *p = TOUPPER(*p);
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100 | modify = 1;
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101 | }
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102 | p++;
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103 | }
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104 |
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105 | if (modify) return str;
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106 | return mrb_nil_value();
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107 | }
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108 |
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109 | /*
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110 | * call-seq:
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111 | * str.swapcase -> new_str
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112 | *
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113 | * Returns a copy of <i>str</i> with uppercase alphabetic characters converted
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114 | * to lowercase and lowercase characters converted to uppercase.
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115 | * Note: case conversion is effective only in ASCII region.
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116 | *
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117 | * "Hello".swapcase #=> "hELLO"
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118 | * "cYbEr_PuNk11".swapcase #=> "CyBeR_pUnK11"
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119 | */
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120 | static mrb_value
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121 | mrb_str_swapcase(mrb_state *mrb, mrb_value self)
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122 | {
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123 | mrb_value str;
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124 |
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125 | str = mrb_str_dup(mrb, self);
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126 | mrb_str_swapcase_bang(mrb, str);
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127 | return str;
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128 | }
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129 |
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130 | /*
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131 | * call-seq:
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132 | * str << integer -> str
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133 | * str.concat(integer) -> str
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134 | * str << obj -> str
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135 | * str.concat(obj) -> str
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136 | *
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137 | * Append---Concatenates the given object to <i>str</i>. If the object is a
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138 | * <code>Integer</code>, it is considered as a codepoint, and is converted
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139 | * to a character before concatenation.
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140 | *
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141 | * a = "hello "
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142 | * a << "world" #=> "hello world"
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143 | * a.concat(33) #=> "hello world!"
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144 | */
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145 | static mrb_value
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146 | mrb_str_concat2(mrb_state *mrb, mrb_value self)
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147 | {
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148 | mrb_value str;
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149 | mrb_get_args(mrb, "S", &str);
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150 | mrb_str_concat(mrb, self, str);
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151 | return self;
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152 | }
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153 |
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154 | /*
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155 | * call-seq:
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156 | * str.start_with?([prefixes]+) -> true or false
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157 | *
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158 | * Returns true if +str+ starts with one of the +prefixes+ given.
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159 | *
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160 | * "hello".start_with?("hell") #=> true
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161 | *
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162 | * # returns true if one of the prefixes matches.
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163 | * "hello".start_with?("heaven", "hell") #=> true
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164 | * "hello".start_with?("heaven", "paradise") #=> false
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165 | * "h".start_with?("heaven", "hell") #=> false
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166 | */
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167 | static mrb_value
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168 | mrb_str_start_with(mrb_state *mrb, mrb_value self)
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169 | {
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170 | mrb_value *argv, sub;
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171 | mrb_int argc, i;
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172 | mrb_get_args(mrb, "*", &argv, &argc);
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173 |
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174 | for (i = 0; i < argc; i++) {
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175 | size_t len_l, len_r;
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176 | int ai = mrb_gc_arena_save(mrb);
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177 | sub = mrb_string_type(mrb, argv[i]);
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178 | mrb_gc_arena_restore(mrb, ai);
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179 | len_l = RSTRING_LEN(self);
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180 | len_r = RSTRING_LEN(sub);
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181 | if (len_l >= len_r) {
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182 | if (memcmp(RSTRING_PTR(self), RSTRING_PTR(sub), len_r) == 0) {
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183 | return mrb_true_value();
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184 | }
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185 | }
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186 | }
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187 | return mrb_false_value();
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188 | }
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189 |
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190 | /*
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191 | * call-seq:
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192 | * str.end_with?([suffixes]+) -> true or false
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193 | *
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194 | * Returns true if +str+ ends with one of the +suffixes+ given.
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195 | */
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196 | static mrb_value
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197 | mrb_str_end_with(mrb_state *mrb, mrb_value self)
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198 | {
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199 | mrb_value *argv, sub;
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200 | mrb_int argc, i;
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201 | mrb_get_args(mrb, "*", &argv, &argc);
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202 |
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203 | for (i = 0; i < argc; i++) {
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204 | size_t len_l, len_r;
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205 | int ai = mrb_gc_arena_save(mrb);
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206 | sub = mrb_string_type(mrb, argv[i]);
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207 | mrb_gc_arena_restore(mrb, ai);
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208 | len_l = RSTRING_LEN(self);
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209 | len_r = RSTRING_LEN(sub);
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210 | if (len_l >= len_r) {
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211 | if (memcmp(RSTRING_PTR(self) + (len_l - len_r),
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212 | RSTRING_PTR(sub),
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213 | len_r) == 0) {
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214 | return mrb_true_value();
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215 | }
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216 | }
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217 | }
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218 | return mrb_false_value();
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219 | }
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220 |
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221 | static mrb_value
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222 | mrb_str_hex(mrb_state *mrb, mrb_value self)
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223 | {
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224 | return mrb_str_to_inum(mrb, self, 16, FALSE);
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225 | }
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226 |
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227 | static mrb_value
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228 | mrb_str_oct(mrb_state *mrb, mrb_value self)
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229 | {
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230 | return mrb_str_to_inum(mrb, self, 8, FALSE);
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231 | }
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232 |
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233 | /*
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234 | * call-seq:
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235 | * string.chr -> string
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236 | *
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237 | * Returns a one-character string at the beginning of the string.
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238 | *
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239 | * a = "abcde"
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240 | * a.chr #=> "a"
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241 | */
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242 | static mrb_value
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243 | mrb_str_chr(mrb_state *mrb, mrb_value self)
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244 | {
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245 | return mrb_str_substr(mrb, self, 0, 1);
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246 | }
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247 |
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248 | static mrb_value
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249 | mrb_fixnum_chr(mrb_state *mrb, mrb_value num)
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250 | {
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251 | mrb_int cp = mrb_fixnum(num);
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252 | #ifdef MRB_UTF8_STRING
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253 | char utf8[4];
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254 | mrb_int len;
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255 |
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256 | if (cp < 0 || 0x10FFFF < cp) {
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257 | mrb_raisef(mrb, E_RANGE_ERROR, "%S out of char range", num);
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258 | }
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259 | if (cp < 0x80) {
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260 | utf8[0] = (char)cp;
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261 | len = 1;
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262 | }
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263 | else if (cp < 0x800) {
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264 | utf8[0] = (char)(0xC0 | (cp >> 6));
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265 | utf8[1] = (char)(0x80 | (cp & 0x3F));
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266 | len = 2;
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267 | }
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268 | else if (cp < 0x10000) {
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269 | utf8[0] = (char)(0xE0 | (cp >> 12));
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270 | utf8[1] = (char)(0x80 | ((cp >> 6) & 0x3F));
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271 | utf8[2] = (char)(0x80 | ( cp & 0x3F));
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272 | len = 3;
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273 | }
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274 | else {
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275 | utf8[0] = (char)(0xF0 | (cp >> 18));
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276 | utf8[1] = (char)(0x80 | ((cp >> 12) & 0x3F));
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277 | utf8[2] = (char)(0x80 | ((cp >> 6) & 0x3F));
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278 | utf8[3] = (char)(0x80 | ( cp & 0x3F));
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279 | len = 4;
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280 | }
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281 | return mrb_str_new(mrb, utf8, len);
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282 | #else
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283 | char c;
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284 |
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285 | if (cp < 0 || 0xff < cp) {
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286 | mrb_raisef(mrb, E_RANGE_ERROR, "%S out of char range", num);
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287 | }
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288 | c = (char)cp;
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289 | return mrb_str_new(mrb, &c, 1);
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290 | #endif
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291 | }
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292 |
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293 | /*
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294 | * call-seq:
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295 | * string.lines -> array of string
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296 | *
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297 | * Returns strings per line;
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298 | *
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299 | * a = "abc\ndef"
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300 | * a.lines #=> ["abc\n", "def"]
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301 | */
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302 | static mrb_value
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303 | mrb_str_lines(mrb_state *mrb, mrb_value self)
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304 | {
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305 | mrb_value result;
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306 | mrb_value blk;
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307 | int ai;
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308 | mrb_int len;
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309 | mrb_value arg;
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310 | char *p = RSTRING_PTR(self), *t;
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311 | char *e = p + RSTRING_LEN(self);
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312 |
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313 | mrb_get_args(mrb, "&", &blk);
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314 |
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315 | result = mrb_ary_new(mrb);
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316 |
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317 | if (!mrb_nil_p(blk)) {
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318 | while (p < e) {
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319 | t = p;
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320 | while (p < e && *p != '\n') p++;
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321 | if (*p == '\n') p++;
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322 | len = (mrb_int) (p - t);
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323 | arg = mrb_str_new(mrb, t, len);
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324 | mrb_yield_argv(mrb, blk, 1, &arg);
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325 | }
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326 | return self;
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327 | }
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328 | while (p < e) {
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329 | ai = mrb_gc_arena_save(mrb);
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330 | t = p;
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331 | while (p < e && *p != '\n') p++;
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332 | if (*p == '\n') p++;
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333 | len = (mrb_int) (p - t);
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334 | mrb_ary_push(mrb, result, mrb_str_new(mrb, t, len));
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335 | mrb_gc_arena_restore(mrb, ai);
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336 | }
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337 | return result;
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338 | }
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339 |
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340 | /*
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341 | * call-seq:
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342 | * string.succ -> string
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343 | *
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344 | * Returns next sequence of the string;
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345 | *
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346 | * a = "abc"
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347 | * a.succ #=> "abd"
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348 | */
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349 | static mrb_value
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350 | mrb_str_succ_bang(mrb_state *mrb, mrb_value self)
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351 | {
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352 | mrb_value result;
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353 | unsigned char *p, *e, *b, *t;
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354 | const char *prepend;
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355 | struct RString *s = mrb_str_ptr(self);
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356 | size_t l;
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357 |
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358 | if (RSTRING_LEN(self) == 0)
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359 | return self;
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360 |
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361 | mrb_str_modify(mrb, s);
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362 | l = RSTRING_LEN(self);
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363 | b = p = (unsigned char*) RSTRING_PTR(self);
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364 | t = e = p + l;
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365 | *(e--) = 0;
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366 |
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367 | // find trailing ascii/number
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368 | while (e >= b) {
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369 | if (ISALNUM(*e))
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370 | break;
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371 | e--;
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372 | }
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373 | if (e < b) {
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374 | e = p + l - 1;
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375 | result = mrb_str_new_lit(mrb, "");
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376 | } else {
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377 | // find leading letter of the ascii/number
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378 | b = e;
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379 | while (b > p) {
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380 | if (!ISALNUM(*b) || (ISALNUM(*b) && *b != '9' && *b != 'z' && *b != 'Z'))
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381 | break;
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382 | b--;
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383 | }
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384 | if (!ISALNUM(*b))
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385 | b++;
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386 | result = mrb_str_new(mrb, (char*) p, b - p);
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387 | }
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388 |
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389 | while (e >= b) {
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390 | if (!ISALNUM(*e)) {
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391 | if (*e == 0xff) {
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392 | mrb_str_cat_lit(mrb, result, "\x01");
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393 | (*e) = 0;
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394 | } else
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395 | (*e)++;
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396 | break;
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397 | }
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398 | prepend = NULL;
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399 | if (*e == '9') {
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400 | if (e == b) prepend = "1";
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401 | *e = '0';
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402 | } else if (*e == 'z') {
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403 | if (e == b) prepend = "a";
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404 | *e = 'a';
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405 | } else if (*e == 'Z') {
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406 | if (e == b) prepend = "A";
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407 | *e = 'A';
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408 | } else {
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409 | (*e)++;
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410 | break;
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411 | }
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412 | if (prepend) mrb_str_cat_cstr(mrb, result, prepend);
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413 | e--;
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414 | }
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415 | result = mrb_str_cat(mrb, result, (char*) b, t - b);
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416 | l = RSTRING_LEN(result);
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417 | mrb_str_resize(mrb, self, l);
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418 | memcpy(RSTRING_PTR(self), RSTRING_PTR(result), l);
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419 | return self;
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420 | }
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421 |
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422 | static mrb_value
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423 | mrb_str_succ(mrb_state *mrb, mrb_value self)
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424 | {
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425 | mrb_value str;
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426 |
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427 | str = mrb_str_dup(mrb, self);
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428 | mrb_str_succ_bang(mrb, str);
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429 | return str;
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430 | }
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431 |
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432 | /*
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433 | * call-seq:
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434 | * str.prepend(other_str) -> str
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435 | *
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436 | * Prepend---Prepend the given string to <i>str</i>.
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437 | *
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438 | * a = "world"
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439 | * a.prepend("hello ") #=> "hello world"
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440 | * a #=> "hello world"
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441 | */
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442 | static mrb_value
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443 | mrb_str_prepend(mrb_state *mrb, mrb_value self)
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444 | {
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445 | struct RString *s1 = mrb_str_ptr(self), *s2, *temp_s;
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446 | mrb_int len;
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447 | mrb_value other, temp_str;
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448 |
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449 | mrb_get_args(mrb, "S", &other);
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450 |
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451 | mrb_str_modify(mrb, s1);
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452 | if (!mrb_string_p(other)) {
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453 | other = mrb_str_to_str(mrb, other);
|
---|
454 | }
|
---|
455 | s2 = mrb_str_ptr(other);
|
---|
456 | len = RSTR_LEN(s1) + RSTR_LEN(s2);
|
---|
457 | temp_str = mrb_str_new(mrb, NULL, RSTR_LEN(s1));
|
---|
458 | temp_s = mrb_str_ptr(temp_str);
|
---|
459 | memcpy(RSTR_PTR(temp_s), RSTR_PTR(s1), RSTR_LEN(s1));
|
---|
460 | if (RSTRING_CAPA(self) < len) {
|
---|
461 | mrb_str_resize(mrb, self, len);
|
---|
462 | }
|
---|
463 | memcpy(RSTR_PTR(s1), RSTR_PTR(s2), RSTR_LEN(s2));
|
---|
464 | memcpy(RSTR_PTR(s1) + RSTR_LEN(s2), RSTR_PTR(temp_s), RSTR_LEN(temp_s));
|
---|
465 | RSTR_SET_LEN(s1, len);
|
---|
466 | RSTR_PTR(s1)[len] = '\0';
|
---|
467 | return self;
|
---|
468 | }
|
---|
469 |
|
---|
470 | #ifdef MRB_UTF8_STRING
|
---|
471 | static const char utf8len_codepage_zero[256] =
|
---|
472 | {
|
---|
473 | 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,
|
---|
474 | 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,
|
---|
475 | 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,
|
---|
476 | 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,
|
---|
477 | 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
|
---|
478 | 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
|
---|
479 | 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,
|
---|
480 | 3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,4,4,4,4,4,0,0,0,0,0,0,0,0,0,0,0,
|
---|
481 | };
|
---|
482 |
|
---|
483 | static mrb_int
|
---|
484 | utf8code(unsigned char* p)
|
---|
485 | {
|
---|
486 | mrb_int len;
|
---|
487 |
|
---|
488 | if (p[0] < 0x80)
|
---|
489 | return p[0];
|
---|
490 |
|
---|
491 | len = utf8len_codepage_zero[p[0]];
|
---|
492 | if (len > 1 && (p[1] & 0xc0) == 0x80) {
|
---|
493 | if (len == 2)
|
---|
494 | return ((p[0] & 0x1f) << 6) + (p[1] & 0x3f);
|
---|
495 | if ((p[2] & 0xc0) == 0x80) {
|
---|
496 | if (len == 3)
|
---|
497 | return ((p[0] & 0x0f) << 12) + ((p[1] & 0x3f) << 6)
|
---|
498 | + (p[2] & 0x3f);
|
---|
499 | if ((p[3] & 0xc0) == 0x80) {
|
---|
500 | if (len == 4)
|
---|
501 | return ((p[0] & 0x07) << 18) + ((p[1] & 0x3f) << 12)
|
---|
502 | + ((p[2] & 0x3f) << 6) + (p[3] & 0x3f);
|
---|
503 | if ((p[4] & 0xc0) == 0x80) {
|
---|
504 | if (len == 5)
|
---|
505 | return ((p[0] & 0x03) << 24) + ((p[1] & 0x3f) << 18)
|
---|
506 | + ((p[2] & 0x3f) << 12) + ((p[3] & 0x3f) << 6)
|
---|
507 | + (p[4] & 0x3f);
|
---|
508 | if ((p[5] & 0xc0) == 0x80 && len == 6)
|
---|
509 | return ((p[0] & 0x01) << 30) + ((p[1] & 0x3f) << 24)
|
---|
510 | + ((p[2] & 0x3f) << 18) + ((p[3] & 0x3f) << 12)
|
---|
511 | + ((p[4] & 0x3f) << 6) + (p[5] & 0x3f);
|
---|
512 | }
|
---|
513 | }
|
---|
514 | }
|
---|
515 | }
|
---|
516 | return p[0];
|
---|
517 | }
|
---|
518 |
|
---|
519 | static mrb_value
|
---|
520 | mrb_str_ord(mrb_state* mrb, mrb_value str)
|
---|
521 | {
|
---|
522 | if (RSTRING_LEN(str) == 0)
|
---|
523 | mrb_raise(mrb, E_ARGUMENT_ERROR, "empty string");
|
---|
524 | return mrb_fixnum_value(utf8code((unsigned char*) RSTRING_PTR(str)));
|
---|
525 | }
|
---|
526 | #else
|
---|
527 | static mrb_value
|
---|
528 | mrb_str_ord(mrb_state* mrb, mrb_value str)
|
---|
529 | {
|
---|
530 | if (RSTRING_LEN(str) == 0)
|
---|
531 | mrb_raise(mrb, E_ARGUMENT_ERROR, "empty string");
|
---|
532 | return mrb_fixnum_value(RSTRING_PTR(str)[0]);
|
---|
533 | }
|
---|
534 | #endif
|
---|
535 |
|
---|
536 | void
|
---|
537 | mrb_mruby_string_ext_gem_init(mrb_state* mrb)
|
---|
538 | {
|
---|
539 | struct RClass * s = mrb->string_class;
|
---|
540 |
|
---|
541 | mrb_define_method(mrb, s, "dump", mrb_str_dump, MRB_ARGS_NONE());
|
---|
542 | mrb_define_method(mrb, s, "getbyte", mrb_str_getbyte, MRB_ARGS_REQ(1));
|
---|
543 | mrb_define_method(mrb, s, "setbyte", mrb_str_setbyte, MRB_ARGS_REQ(2));
|
---|
544 | mrb_define_method(mrb, s, "byteslice", mrb_str_byteslice, MRB_ARGS_REQ(1)|MRB_ARGS_OPT(1));
|
---|
545 | mrb_define_method(mrb, s, "swapcase!", mrb_str_swapcase_bang, MRB_ARGS_NONE());
|
---|
546 | mrb_define_method(mrb, s, "swapcase", mrb_str_swapcase, MRB_ARGS_NONE());
|
---|
547 | mrb_define_method(mrb, s, "concat", mrb_str_concat2, MRB_ARGS_REQ(1));
|
---|
548 | mrb_define_method(mrb, s, "<<", mrb_str_concat2, MRB_ARGS_REQ(1));
|
---|
549 | mrb_define_method(mrb, s, "start_with?", mrb_str_start_with, MRB_ARGS_REST());
|
---|
550 | mrb_define_method(mrb, s, "end_with?", mrb_str_end_with, MRB_ARGS_REST());
|
---|
551 | mrb_define_method(mrb, s, "hex", mrb_str_hex, MRB_ARGS_NONE());
|
---|
552 | mrb_define_method(mrb, s, "oct", mrb_str_oct, MRB_ARGS_NONE());
|
---|
553 | mrb_define_method(mrb, s, "chr", mrb_str_chr, MRB_ARGS_NONE());
|
---|
554 | mrb_define_method(mrb, s, "lines", mrb_str_lines, MRB_ARGS_NONE());
|
---|
555 | mrb_define_method(mrb, s, "succ", mrb_str_succ, MRB_ARGS_NONE());
|
---|
556 | mrb_define_method(mrb, s, "succ!", mrb_str_succ_bang, MRB_ARGS_NONE());
|
---|
557 | mrb_define_method(mrb, s, "prepend", mrb_str_prepend, MRB_ARGS_REQ(1));
|
---|
558 | mrb_alias_method(mrb, s, mrb_intern_lit(mrb, "next"), mrb_intern_lit(mrb, "succ"));
|
---|
559 | mrb_alias_method(mrb, s, mrb_intern_lit(mrb, "next!"), mrb_intern_lit(mrb, "succ!"));
|
---|
560 | mrb_define_method(mrb, s, "ord", mrb_str_ord, MRB_ARGS_NONE());
|
---|
561 |
|
---|
562 | mrb_define_method(mrb, mrb->fixnum_class, "chr", mrb_fixnum_chr, MRB_ARGS_NONE());
|
---|
563 | }
|
---|
564 |
|
---|
565 | void
|
---|
566 | mrb_mruby_string_ext_gem_final(mrb_state* mrb)
|
---|
567 | {
|
---|
568 | }
|
---|