1 | /* Copyright (C) 2012-2015 Mark Nunberg.
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2 | *
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3 | * See included LICENSE file for license details.
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4 | */
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5 | /* copy from LICENSE file
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6 | Copyright (c) 2012-2015 M. Nunberg, mnunberg@haskalah.org
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7 |
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8 | Permission is hereby granted, free of charge, to any person obtaining
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9 | a copy of this software and associated documentation files (the
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10 | "Software"), to deal in the Software without restriction, including
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11 | without limitation the rights to use, copy, modify, merge, publish,
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12 | distribute, sublicense, and/or sell copies of the Software, and to
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13 | permit persons to whom the Software is furnished to do so, subject to
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14 | the following conditions:
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15 |
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16 | The above copyright notice and this permission notice shall be
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17 | included in all copies or substantial portions of the Software.
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18 |
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19 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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20 | EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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21 | MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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22 | NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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23 | LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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24 | OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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25 | WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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26 | */
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27 | #include "jsonsl.h"
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28 | #include <limits.h>
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29 | #include <ctype.h>
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30 |
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31 | #ifdef JSONSL_USE_METRICS
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32 | #define XMETRICS \
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33 | X(STRINGY_INSIGNIFICANT) \
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34 | X(STRINGY_SLOWPATH) \
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35 | X(ALLOWED_WHITESPACE) \
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36 | X(QUOTE_FASTPATH) \
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37 | X(SPECIAL_FASTPATH) \
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38 | X(SPECIAL_WSPOP) \
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39 | X(SPECIAL_SLOWPATH) \
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40 | X(GENERIC) \
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41 | X(STRUCTURAL_TOKEN) \
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42 | X(SPECIAL_SWITCHFIRST) \
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43 | X(STRINGY_CATCH) \
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44 | X(NUMBER_FASTPATH) \
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45 | X(ESCAPES) \
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46 | X(TOTAL) \
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47 |
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48 | struct jsonsl_metrics_st {
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49 | #define X(m) \
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50 | unsigned long metric_##m;
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51 | XMETRICS
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52 | #undef X
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53 | };
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54 |
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55 | static struct jsonsl_metrics_st GlobalMetrics = { 0 };
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56 | static unsigned long GenericCounter[0x100] = { 0 };
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57 | static unsigned long StringyCatchCounter[0x100] = { 0 };
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58 |
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59 | #define INCR_METRIC(m) \
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60 | GlobalMetrics.metric_##m++;
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61 |
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62 | #define INCR_GENERIC(c) \
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63 | INCR_METRIC(GENERIC); \
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64 | GenericCounter[c]++; \
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65 |
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66 | #define INCR_STRINGY_CATCH(c) \
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67 | INCR_METRIC(STRINGY_CATCH); \
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68 | StringyCatchCounter[c]++;
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69 |
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70 | JSONSL_API
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71 | void jsonsl_dump_global_metrics(void)
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72 | {
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73 | int ii;
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74 | printf("JSONSL Metrics:\n");
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75 | #define X(m) \
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76 | printf("\t%-30s %20lu (%0.2f%%)\n", #m, GlobalMetrics.metric_##m, \
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77 | (float)((float)(GlobalMetrics.metric_##m/(float)GlobalMetrics.metric_TOTAL)) * 100);
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78 | XMETRICS
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79 | #undef X
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80 | printf("Generic Characters:\n");
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81 | for (ii = 0; ii < 0xff; ii++) {
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82 | if (GenericCounter[ii]) {
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83 | printf("\t[ %c ] %lu\n", ii, GenericCounter[ii]);
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84 | }
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85 | }
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86 | printf("Weird string loop\n");
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87 | for (ii = 0; ii < 0xff; ii++) {
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88 | if (StringyCatchCounter[ii]) {
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89 | printf("\t[ %c ] %lu\n", ii, StringyCatchCounter[ii]);
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90 | }
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91 | }
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92 | }
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93 |
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94 | #else
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95 | #define INCR_METRIC(m)
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96 | #define INCR_GENERIC(c)
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97 | #define INCR_STRINGY_CATCH(c)
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98 | JSONSL_API
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99 | void jsonsl_dump_global_metrics(void) { }
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100 | #endif /* JSONSL_USE_METRICS */
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101 |
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102 | #define CASE_DIGITS \
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103 | case '1': \
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104 | case '2': \
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105 | case '3': \
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106 | case '4': \
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107 | case '5': \
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108 | case '6': \
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109 | case '7': \
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110 | case '8': \
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111 | case '9': \
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112 | case '0':
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113 |
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114 | static unsigned extract_special(unsigned);
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115 | static int is_special_end(unsigned);
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116 | static int is_allowed_whitespace(unsigned);
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117 | static int is_allowed_escape(unsigned);
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118 | static int is_simple_char(unsigned);
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119 | static char get_escape_equiv(unsigned);
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120 |
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121 | JSONSL_API
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122 | jsonsl_t jsonsl_new(int nlevels)
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123 | {
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124 | unsigned int ii;
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125 | struct jsonsl_st * jsn;
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126 |
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127 | if (nlevels < 2) {
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128 | return NULL;
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129 | }
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130 |
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131 | jsn = (struct jsonsl_st *)
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132 | calloc(1, sizeof (*jsn) +
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133 | ( (nlevels-1) * sizeof (struct jsonsl_state_st) )
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134 | );
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135 |
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136 | jsn->levels_max = (unsigned int) nlevels;
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137 | jsn->max_callback_level = UINT_MAX;
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138 | jsonsl_reset(jsn);
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139 | for (ii = 0; ii < jsn->levels_max; ii++) {
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140 | jsn->stack[ii].level = ii;
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141 | }
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142 | return jsn;
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143 | }
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144 |
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145 | JSONSL_API
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146 | void jsonsl_reset(jsonsl_t jsn)
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147 | {
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148 | jsn->tok_last = 0;
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149 | jsn->can_insert = 1;
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150 | jsn->pos = 0;
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151 | jsn->level = 0;
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152 | jsn->stopfl = 0;
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153 | jsn->in_escape = 0;
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154 | jsn->expecting = 0;
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155 | }
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156 |
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157 | JSONSL_API
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158 | void jsonsl_destroy(jsonsl_t jsn)
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159 | {
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160 | if (jsn) {
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161 | free(jsn);
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162 | }
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163 | }
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164 |
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165 |
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166 | #define FASTPARSE_EXHAUSTED 1
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167 | #define FASTPARSE_BREAK 0
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168 |
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169 | /*
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170 | * This function is meant to accelerate string parsing, reducing the main loop's
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171 | * check if we are indeed a string.
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172 | *
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173 | * @param jsn the parser
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174 | * @param[in,out] bytes_p A pointer to the current buffer (i.e. current position)
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175 | * @param[in,out] nbytes_p A pointer to the current size of the buffer
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176 | * @return true if all bytes have been exhausted (and thus the main loop can
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177 | * return), false if a special character was examined which requires greater
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178 | * examination.
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179 | */
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180 | static int
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181 | jsonsl__str_fastparse(jsonsl_t jsn,
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182 | const jsonsl_uchar_t **bytes_p, size_t *nbytes_p)
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183 | {
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184 | const jsonsl_uchar_t *bytes = *bytes_p;
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185 | const jsonsl_uchar_t *end;
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186 | for (end = bytes + *nbytes_p; bytes != end; bytes++) {
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187 | if (
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188 | #ifdef JSONSL_USE_WCHAR
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189 | *bytes >= 0x100 ||
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190 | #endif /* JSONSL_USE_WCHAR */
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191 | (is_simple_char(*bytes))) {
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192 | INCR_METRIC(TOTAL);
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193 | INCR_METRIC(STRINGY_INSIGNIFICANT);
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194 | } else {
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195 | /* Once we're done here, re-calculate the position variables */
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196 | jsn->pos += (bytes - *bytes_p);
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197 | *nbytes_p -= (bytes - *bytes_p);
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198 | *bytes_p = bytes;
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199 | return FASTPARSE_BREAK;
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200 | }
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201 | }
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202 |
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203 | /* Once we're done here, re-calculate the position variables */
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204 | jsn->pos += (bytes - *bytes_p);
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205 | return FASTPARSE_EXHAUSTED;
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206 | }
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207 |
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208 | /* Functions exactly like str_fastparse, except it also accepts a 'state'
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209 | * argument, since the number's value is updated in the state. */
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210 | static int
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211 | jsonsl__num_fastparse(jsonsl_t jsn,
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212 | const jsonsl_uchar_t **bytes_p, size_t *nbytes_p,
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213 | struct jsonsl_state_st *state)
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214 | {
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215 | int exhausted = 1;
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216 | size_t nbytes = *nbytes_p;
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217 | const jsonsl_uchar_t *bytes = *bytes_p;
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218 |
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219 | for (; nbytes; nbytes--, bytes++) {
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220 | jsonsl_uchar_t c = *bytes;
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221 | if (isdigit(c)) {
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222 | INCR_METRIC(TOTAL);
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223 | INCR_METRIC(NUMBER_FASTPATH);
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224 | state->nelem = (state->nelem * 10) + (c - 0x30);
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225 | } else {
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226 | exhausted = 0;
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227 | break;
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228 | }
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229 | }
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230 | jsn->pos += (*nbytes_p - nbytes);
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231 | if (exhausted) {
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232 | return FASTPARSE_EXHAUSTED;
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233 | }
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234 | *nbytes_p = nbytes;
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235 | *bytes_p = bytes;
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236 | return FASTPARSE_BREAK;
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237 | }
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238 |
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239 | JSONSL_API
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240 | void
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241 | jsonsl_feed(jsonsl_t jsn, const jsonsl_char_t *bytes, size_t nbytes)
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242 | {
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243 |
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244 | #define INVOKE_ERROR(eb) \
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245 | if (jsn->error_callback(jsn, JSONSL_ERROR_##eb, state, (char*)c)) { \
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246 | goto GT_AGAIN; \
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247 | } \
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248 | return;
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249 |
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250 | #define STACK_PUSH \
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251 | if (jsn->level >= (levels_max-1)) { \
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252 | jsn->error_callback(jsn, JSONSL_ERROR_LEVELS_EXCEEDED, state, (char*)c); \
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253 | return; \
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254 | } \
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255 | state = jsn->stack + (++jsn->level); \
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256 | state->ignore_callback = jsn->stack[jsn->level-1].ignore_callback; \
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257 | state->pos_begin = jsn->pos;
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258 |
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259 | #define STACK_POP_NOPOS \
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260 | state->pos_cur = jsn->pos; \
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261 | state = jsn->stack + (--jsn->level);
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262 |
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263 |
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264 | #define STACK_POP \
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265 | STACK_POP_NOPOS; \
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266 | state->pos_cur = jsn->pos;
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267 |
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268 | #define CALLBACK_AND_POP_NOPOS(T) \
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269 | state->pos_cur = jsn->pos; \
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270 | DO_CALLBACK(T, POP); \
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271 | state->nescapes = 0; \
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272 | state = jsn->stack + (--jsn->level);
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273 |
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274 | #define CALLBACK_AND_POP(T) \
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275 | CALLBACK_AND_POP_NOPOS(T); \
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276 | state->pos_cur = jsn->pos;
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277 |
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278 | #define SPECIAL_POP \
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279 | CALLBACK_AND_POP(SPECIAL); \
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280 | jsn->expecting = 0; \
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281 | jsn->tok_last = 0; \
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282 |
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283 | #define CUR_CHAR (*(jsonsl_uchar_t*)c)
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284 |
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285 | #define DO_CALLBACK(T, action) \
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286 | if (jsn->call_##T && \
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287 | jsn->max_callback_level > state->level && \
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288 | state->ignore_callback == 0) { \
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289 | \
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290 | if (jsn->action_callback_##action) { \
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291 | jsn->action_callback_##action(jsn, JSONSL_ACTION_##action, state, (jsonsl_char_t*)c); \
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292 | } else if (jsn->action_callback) { \
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293 | jsn->action_callback(jsn, JSONSL_ACTION_##action, state, (jsonsl_char_t*)c); \
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294 | } \
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295 | if (jsn->stopfl) { return; } \
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296 | }
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297 |
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298 | /**
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299 | * Verifies that we are able to insert the (non-string) item into a hash.
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300 | */
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301 | #define ENSURE_HVAL \
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302 | if (state->nelem % 2 == 0 && state->type == JSONSL_T_OBJECT) { \
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303 | INVOKE_ERROR(HKEY_EXPECTED); \
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304 | }
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305 |
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306 | #define VERIFY_SPECIAL(lit) \
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307 | if (CUR_CHAR != (lit)[jsn->pos - state->pos_begin]) { \
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308 | INVOKE_ERROR(SPECIAL_EXPECTED); \
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309 | }
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310 |
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311 | #define VERIFY_SPECIAL_CI(lit) \
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312 | if (tolower(CUR_CHAR) != (lit)[jsn->pos - state->pos_begin]) { \
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313 | INVOKE_ERROR(SPECIAL_EXPECTED); \
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314 | }
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315 |
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316 | #define STATE_SPECIAL_LENGTH \
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317 | (state)->nescapes
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318 |
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319 | #define IS_NORMAL_NUMBER \
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320 | ((state)->special_flags == JSONSL_SPECIALf_UNSIGNED || \
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321 | (state)->special_flags == JSONSL_SPECIALf_SIGNED)
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322 |
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323 | #define STATE_NUM_LAST jsn->tok_last
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324 |
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325 | #define CONTINUE_NEXT_CHAR() continue
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326 |
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327 | const jsonsl_uchar_t *c = (jsonsl_uchar_t*)bytes;
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328 | size_t levels_max = jsn->levels_max;
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329 | struct jsonsl_state_st *state = jsn->stack + jsn->level;
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330 | jsn->base = bytes;
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331 |
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332 | for (; nbytes; nbytes--, jsn->pos++, c++) {
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333 | unsigned state_type;
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334 | INCR_METRIC(TOTAL);
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335 |
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336 | GT_AGAIN:
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337 | state_type = state->type;
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338 | /* Most common type is typically a string: */
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339 | if (state_type & JSONSL_Tf_STRINGY) {
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340 | /* Special escape handling for some stuff */
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341 | if (jsn->in_escape) {
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342 | jsn->in_escape = 0;
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343 | if (!is_allowed_escape(CUR_CHAR)) {
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344 | INVOKE_ERROR(ESCAPE_INVALID);
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345 | } else if (CUR_CHAR == 'u') {
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346 | DO_CALLBACK(UESCAPE, UESCAPE);
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347 | if (jsn->return_UESCAPE) {
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348 | return;
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349 | }
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350 | }
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351 | CONTINUE_NEXT_CHAR();
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352 | }
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353 |
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354 | if (jsonsl__str_fastparse(jsn, &c, &nbytes) ==
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355 | FASTPARSE_EXHAUSTED) {
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356 | /* No need to readjust variables as we've exhausted the iterator */
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357 | return;
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358 | } else {
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359 | if (CUR_CHAR == '"') {
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360 | goto GT_QUOTE;
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361 | } else if (CUR_CHAR == '\\') {
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362 | goto GT_ESCAPE;
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363 | } else {
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364 | INVOKE_ERROR(WEIRD_WHITESPACE);
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365 | }
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366 | }
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367 | INCR_METRIC(STRINGY_SLOWPATH);
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368 |
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369 | } else if (state_type == JSONSL_T_SPECIAL) {
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370 | /* Fast track for signed/unsigned */
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371 | if (IS_NORMAL_NUMBER) {
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372 | if (jsonsl__num_fastparse(jsn, &c, &nbytes, state) ==
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373 | FASTPARSE_EXHAUSTED) {
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374 | return;
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375 | } else {
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376 | goto GT_SPECIAL_NUMERIC;
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377 | }
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378 | } else if (state->special_flags == JSONSL_SPECIALf_DASH) {
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379 | #ifdef JSONSL_PARSE_NAN
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380 | if (CUR_CHAR == 'I' || CUR_CHAR == 'i') {
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381 | /* parsing -Infinity? */
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382 | state->special_flags = JSONSL_SPECIALf_NEG_INF;
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383 | CONTINUE_NEXT_CHAR();
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384 | }
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385 | #endif
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386 |
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387 | if (!isdigit(CUR_CHAR)) {
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388 | INVOKE_ERROR(INVALID_NUMBER);
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389 | }
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390 |
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391 | if (CUR_CHAR == '0') {
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392 | state->special_flags = JSONSL_SPECIALf_ZERO|JSONSL_SPECIALf_SIGNED;
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393 | } else if (isdigit(CUR_CHAR)) {
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394 | state->special_flags = JSONSL_SPECIALf_SIGNED;
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395 | state->nelem = CUR_CHAR - 0x30;
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396 | } else {
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397 | INVOKE_ERROR(INVALID_NUMBER);
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398 | }
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399 | CONTINUE_NEXT_CHAR();
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400 |
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401 | } else if (state->special_flags == JSONSL_SPECIALf_ZERO) {
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402 | if (isdigit(CUR_CHAR)) {
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403 | /* Following a zero! */
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404 | INVOKE_ERROR(INVALID_NUMBER);
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405 | }
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406 | /* Unset the 'zero' flag: */
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407 | if (state->special_flags & JSONSL_SPECIALf_SIGNED) {
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408 | state->special_flags = JSONSL_SPECIALf_SIGNED;
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409 | } else {
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410 | state->special_flags = JSONSL_SPECIALf_UNSIGNED;
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411 | }
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412 | goto GT_SPECIAL_NUMERIC;
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413 | }
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414 |
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415 | if ((state->special_flags & JSONSL_SPECIALf_NUMERIC) &&
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416 | !(state->special_flags & JSONSL_SPECIALf_INF)) {
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417 | GT_SPECIAL_NUMERIC:
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418 | switch (CUR_CHAR) {
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419 | CASE_DIGITS
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420 | STATE_NUM_LAST = '1';
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421 | CONTINUE_NEXT_CHAR();
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422 |
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423 | case '.':
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424 | if (state->special_flags & JSONSL_SPECIALf_FLOAT) {
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425 | INVOKE_ERROR(INVALID_NUMBER);
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426 | }
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427 | state->special_flags |= JSONSL_SPECIALf_FLOAT;
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428 | STATE_NUM_LAST = '.';
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429 | CONTINUE_NEXT_CHAR();
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430 |
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431 | case 'e':
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432 | case 'E':
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433 | if (state->special_flags & JSONSL_SPECIALf_EXPONENT) {
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434 | INVOKE_ERROR(INVALID_NUMBER);
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435 | }
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436 | state->special_flags |= JSONSL_SPECIALf_EXPONENT;
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437 | STATE_NUM_LAST = 'e';
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438 | CONTINUE_NEXT_CHAR();
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439 |
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440 | case '-':
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441 | case '+':
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442 | if (STATE_NUM_LAST != 'e') {
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443 | INVOKE_ERROR(INVALID_NUMBER);
|
---|
444 | }
|
---|
445 | STATE_NUM_LAST = '-';
|
---|
446 | CONTINUE_NEXT_CHAR();
|
---|
447 |
|
---|
448 | default:
|
---|
449 | if (is_special_end(CUR_CHAR)) {
|
---|
450 | goto GT_SPECIAL_POP;
|
---|
451 | }
|
---|
452 | INVOKE_ERROR(INVALID_NUMBER);
|
---|
453 | break;
|
---|
454 | }
|
---|
455 | }
|
---|
456 | /* else if (!NUMERIC) */
|
---|
457 | if (!is_special_end(CUR_CHAR)) {
|
---|
458 | STATE_SPECIAL_LENGTH++;
|
---|
459 |
|
---|
460 | /* Verify TRUE, FALSE, NULL */
|
---|
461 | if (state->special_flags == JSONSL_SPECIALf_TRUE) {
|
---|
462 | VERIFY_SPECIAL("true");
|
---|
463 | } else if (state->special_flags == JSONSL_SPECIALf_FALSE) {
|
---|
464 | VERIFY_SPECIAL("false");
|
---|
465 | } else if (state->special_flags == JSONSL_SPECIALf_NULL) {
|
---|
466 | VERIFY_SPECIAL("null");
|
---|
467 | #ifdef JSONSL_PARSE_NAN
|
---|
468 | } else if (state->special_flags == JSONSL_SPECIALf_POS_INF) {
|
---|
469 | VERIFY_SPECIAL_CI("infinity");
|
---|
470 | } else if (state->special_flags == JSONSL_SPECIALf_NEG_INF) {
|
---|
471 | VERIFY_SPECIAL_CI("-infinity");
|
---|
472 | } else if (state->special_flags == JSONSL_SPECIALf_NAN) {
|
---|
473 | VERIFY_SPECIAL_CI("nan");
|
---|
474 | } else if (state->special_flags & JSONSL_SPECIALf_NULL ||
|
---|
475 | state->special_flags & JSONSL_SPECIALf_NAN) {
|
---|
476 | /* previous char was "n", are we parsing null or nan? */
|
---|
477 | if (CUR_CHAR != 'u') {
|
---|
478 | state->special_flags &= ~JSONSL_SPECIALf_NULL;
|
---|
479 | }
|
---|
480 |
|
---|
481 | if (tolower(CUR_CHAR) != 'a') {
|
---|
482 | state->special_flags &= ~JSONSL_SPECIALf_NAN;
|
---|
483 | }
|
---|
484 | #endif
|
---|
485 | }
|
---|
486 | INCR_METRIC(SPECIAL_FASTPATH);
|
---|
487 | CONTINUE_NEXT_CHAR();
|
---|
488 | }
|
---|
489 |
|
---|
490 | GT_SPECIAL_POP:
|
---|
491 | jsn->can_insert = 0;
|
---|
492 | if (IS_NORMAL_NUMBER) {
|
---|
493 | /* Nothing */
|
---|
494 | } else if (state->special_flags == JSONSL_SPECIALf_ZERO ||
|
---|
495 | state->special_flags == (JSONSL_SPECIALf_ZERO|JSONSL_SPECIALf_SIGNED)) {
|
---|
496 | /* 0 is unsigned! */
|
---|
497 | state->special_flags = JSONSL_SPECIALf_UNSIGNED;
|
---|
498 | } else if (state->special_flags == JSONSL_SPECIALf_DASH) {
|
---|
499 | /* Still in dash! */
|
---|
500 | INVOKE_ERROR(INVALID_NUMBER);
|
---|
501 | } else if (state->special_flags & JSONSL_SPECIALf_INF) {
|
---|
502 | if (STATE_SPECIAL_LENGTH != 8) {
|
---|
503 | INVOKE_ERROR(SPECIAL_INCOMPLETE);
|
---|
504 | }
|
---|
505 | state->nelem = 1;
|
---|
506 | } else if (state->special_flags & JSONSL_SPECIALf_NUMERIC) {
|
---|
507 | /* Check that we're not at the end of a token */
|
---|
508 | if (STATE_NUM_LAST != '1') {
|
---|
509 | INVOKE_ERROR(INVALID_NUMBER);
|
---|
510 | }
|
---|
511 | } else if (state->special_flags == JSONSL_SPECIALf_TRUE) {
|
---|
512 | if (STATE_SPECIAL_LENGTH != 4) {
|
---|
513 | INVOKE_ERROR(SPECIAL_INCOMPLETE);
|
---|
514 | }
|
---|
515 | state->nelem = 1;
|
---|
516 | } else if (state->special_flags == JSONSL_SPECIALf_FALSE) {
|
---|
517 | if (STATE_SPECIAL_LENGTH != 5) {
|
---|
518 | INVOKE_ERROR(SPECIAL_INCOMPLETE);
|
---|
519 | }
|
---|
520 | } else if (state->special_flags == JSONSL_SPECIALf_NULL) {
|
---|
521 | if (STATE_SPECIAL_LENGTH != 4) {
|
---|
522 | INVOKE_ERROR(SPECIAL_INCOMPLETE);
|
---|
523 | }
|
---|
524 | }
|
---|
525 | SPECIAL_POP;
|
---|
526 | jsn->expecting = ',';
|
---|
527 | if (is_allowed_whitespace(CUR_CHAR)) {
|
---|
528 | CONTINUE_NEXT_CHAR();
|
---|
529 | }
|
---|
530 | /**
|
---|
531 | * This works because we have a non-whitespace token
|
---|
532 | * which is not a special token. If this is a structural
|
---|
533 | * character then it will be gracefully handled by the
|
---|
534 | * switch statement. Otherwise it will default to the 'special'
|
---|
535 | * state again,
|
---|
536 | */
|
---|
537 | goto GT_STRUCTURAL_TOKEN;
|
---|
538 | } else if (is_allowed_whitespace(CUR_CHAR)) {
|
---|
539 | INCR_METRIC(ALLOWED_WHITESPACE);
|
---|
540 | /* So we're not special. Harmless insignificant whitespace
|
---|
541 | * passthrough
|
---|
542 | */
|
---|
543 | CONTINUE_NEXT_CHAR();
|
---|
544 | } else if (extract_special(CUR_CHAR)) {
|
---|
545 | /* not a string, whitespace, or structural token. must be special */
|
---|
546 | goto GT_SPECIAL_BEGIN;
|
---|
547 | }
|
---|
548 |
|
---|
549 | INCR_GENERIC(CUR_CHAR);
|
---|
550 |
|
---|
551 | if (CUR_CHAR == '"') {
|
---|
552 | GT_QUOTE:
|
---|
553 | jsn->can_insert = 0;
|
---|
554 | switch (state_type) {
|
---|
555 |
|
---|
556 | /* the end of a string or hash key */
|
---|
557 | case JSONSL_T_STRING:
|
---|
558 | CALLBACK_AND_POP(STRING);
|
---|
559 | CONTINUE_NEXT_CHAR();
|
---|
560 | case JSONSL_T_HKEY:
|
---|
561 | CALLBACK_AND_POP(HKEY);
|
---|
562 | CONTINUE_NEXT_CHAR();
|
---|
563 |
|
---|
564 | case JSONSL_T_OBJECT:
|
---|
565 | state->nelem++;
|
---|
566 | if ( (state->nelem-1) % 2 ) {
|
---|
567 | /* Odd, this must be a hash value */
|
---|
568 | if (jsn->tok_last != ':') {
|
---|
569 | INVOKE_ERROR(MISSING_TOKEN);
|
---|
570 | }
|
---|
571 | jsn->expecting = ','; /* Can't figure out what to expect next */
|
---|
572 | jsn->tok_last = 0;
|
---|
573 |
|
---|
574 | STACK_PUSH;
|
---|
575 | state->type = JSONSL_T_STRING;
|
---|
576 | DO_CALLBACK(STRING, PUSH);
|
---|
577 |
|
---|
578 | } else {
|
---|
579 | /* hash key */
|
---|
580 | if (jsn->expecting != '"') {
|
---|
581 | INVOKE_ERROR(STRAY_TOKEN);
|
---|
582 | }
|
---|
583 | jsn->tok_last = 0;
|
---|
584 | jsn->expecting = ':';
|
---|
585 |
|
---|
586 | STACK_PUSH;
|
---|
587 | state->type = JSONSL_T_HKEY;
|
---|
588 | DO_CALLBACK(HKEY, PUSH);
|
---|
589 | }
|
---|
590 | CONTINUE_NEXT_CHAR();
|
---|
591 |
|
---|
592 | case JSONSL_T_LIST:
|
---|
593 | state->nelem++;
|
---|
594 | STACK_PUSH;
|
---|
595 | state->type = JSONSL_T_STRING;
|
---|
596 | jsn->expecting = ',';
|
---|
597 | jsn->tok_last = 0;
|
---|
598 | DO_CALLBACK(STRING, PUSH);
|
---|
599 | CONTINUE_NEXT_CHAR();
|
---|
600 |
|
---|
601 | case JSONSL_T_SPECIAL:
|
---|
602 | INVOKE_ERROR(STRAY_TOKEN);
|
---|
603 | break;
|
---|
604 |
|
---|
605 | default:
|
---|
606 | INVOKE_ERROR(STRING_OUTSIDE_CONTAINER);
|
---|
607 | break;
|
---|
608 | } /* switch(state->type) */
|
---|
609 | } else if (CUR_CHAR == '\\') {
|
---|
610 | GT_ESCAPE:
|
---|
611 | INCR_METRIC(ESCAPES);
|
---|
612 | /* Escape */
|
---|
613 | if ( (state->type & JSONSL_Tf_STRINGY) == 0 ) {
|
---|
614 | INVOKE_ERROR(ESCAPE_OUTSIDE_STRING);
|
---|
615 | }
|
---|
616 | state->nescapes++;
|
---|
617 | jsn->in_escape = 1;
|
---|
618 | CONTINUE_NEXT_CHAR();
|
---|
619 | } /* " or \ */
|
---|
620 |
|
---|
621 | GT_STRUCTURAL_TOKEN:
|
---|
622 | switch (CUR_CHAR) {
|
---|
623 | case ':':
|
---|
624 | INCR_METRIC(STRUCTURAL_TOKEN);
|
---|
625 | if (jsn->expecting != CUR_CHAR) {
|
---|
626 | INVOKE_ERROR(STRAY_TOKEN);
|
---|
627 | }
|
---|
628 | jsn->tok_last = ':';
|
---|
629 | jsn->can_insert = 1;
|
---|
630 | jsn->expecting = '"';
|
---|
631 | CONTINUE_NEXT_CHAR();
|
---|
632 |
|
---|
633 | case ',':
|
---|
634 | INCR_METRIC(STRUCTURAL_TOKEN);
|
---|
635 | /**
|
---|
636 | * The comma is one of the more generic tokens.
|
---|
637 | * In the context of an OBJECT, the can_insert flag
|
---|
638 | * should never be set, and no other action is
|
---|
639 | * necessary.
|
---|
640 | */
|
---|
641 | if (jsn->expecting != CUR_CHAR) {
|
---|
642 | /* make this branch execute only when we haven't manually
|
---|
643 | * just placed the ',' in the expecting register.
|
---|
644 | */
|
---|
645 | INVOKE_ERROR(STRAY_TOKEN);
|
---|
646 | }
|
---|
647 |
|
---|
648 | if (state->type == JSONSL_T_OBJECT) {
|
---|
649 | /* end of hash value, expect a string as a hash key */
|
---|
650 | jsn->expecting = '"';
|
---|
651 | } else {
|
---|
652 | jsn->can_insert = 1;
|
---|
653 | }
|
---|
654 |
|
---|
655 | jsn->tok_last = ',';
|
---|
656 | jsn->expecting = '"';
|
---|
657 | CONTINUE_NEXT_CHAR();
|
---|
658 |
|
---|
659 | /* new list or object */
|
---|
660 | /* hashes are more common */
|
---|
661 | case '{':
|
---|
662 | case '[':
|
---|
663 | INCR_METRIC(STRUCTURAL_TOKEN);
|
---|
664 | if (!jsn->can_insert) {
|
---|
665 | INVOKE_ERROR(CANT_INSERT);
|
---|
666 | }
|
---|
667 |
|
---|
668 | ENSURE_HVAL;
|
---|
669 | state->nelem++;
|
---|
670 |
|
---|
671 | STACK_PUSH;
|
---|
672 | /* because the constants match the opening delimiters, we can do this: */
|
---|
673 | state->type = CUR_CHAR;
|
---|
674 | state->nelem = 0;
|
---|
675 | jsn->can_insert = 1;
|
---|
676 | if (CUR_CHAR == '{') {
|
---|
677 | /* If we're a hash, we expect a key first, which is quouted */
|
---|
678 | jsn->expecting = '"';
|
---|
679 | }
|
---|
680 | if (CUR_CHAR == JSONSL_T_OBJECT) {
|
---|
681 | DO_CALLBACK(OBJECT, PUSH);
|
---|
682 | } else {
|
---|
683 | DO_CALLBACK(LIST, PUSH);
|
---|
684 | }
|
---|
685 | jsn->tok_last = 0;
|
---|
686 | CONTINUE_NEXT_CHAR();
|
---|
687 |
|
---|
688 | /* closing of list or object */
|
---|
689 | case '}':
|
---|
690 | case ']':
|
---|
691 | INCR_METRIC(STRUCTURAL_TOKEN);
|
---|
692 | if (jsn->tok_last == ',' && jsn->options.allow_trailing_comma == 0) {
|
---|
693 | INVOKE_ERROR(TRAILING_COMMA);
|
---|
694 | }
|
---|
695 |
|
---|
696 | jsn->can_insert = 0;
|
---|
697 | jsn->level--;
|
---|
698 | jsn->expecting = ',';
|
---|
699 | jsn->tok_last = 0;
|
---|
700 | if (CUR_CHAR == ']') {
|
---|
701 | if (state->type != '[') {
|
---|
702 | INVOKE_ERROR(BRACKET_MISMATCH);
|
---|
703 | }
|
---|
704 | DO_CALLBACK(LIST, POP);
|
---|
705 | } else {
|
---|
706 | if (state->type != '{') {
|
---|
707 | INVOKE_ERROR(BRACKET_MISMATCH);
|
---|
708 | } else if (state->nelem && state->nelem % 2 != 0) {
|
---|
709 | INVOKE_ERROR(VALUE_EXPECTED);
|
---|
710 | }
|
---|
711 | DO_CALLBACK(OBJECT, POP);
|
---|
712 | }
|
---|
713 | state = jsn->stack + jsn->level;
|
---|
714 | state->pos_cur = jsn->pos;
|
---|
715 | CONTINUE_NEXT_CHAR();
|
---|
716 |
|
---|
717 | default:
|
---|
718 | GT_SPECIAL_BEGIN:
|
---|
719 | /**
|
---|
720 | * Not a string, not a structural token, and not benign whitespace.
|
---|
721 | * Technically we should iterate over the character always, but since
|
---|
722 | * we are not doing full numerical/value decoding anyway (but only hinting),
|
---|
723 | * we only check upon entry.
|
---|
724 | */
|
---|
725 | if (state->type != JSONSL_T_SPECIAL) {
|
---|
726 | int special_flags = extract_special(CUR_CHAR);
|
---|
727 | if (!special_flags) {
|
---|
728 | /**
|
---|
729 | * Try to do some heuristics here anyway to figure out what kind of
|
---|
730 | * error this is. The 'special' case is a fallback scenario anyway.
|
---|
731 | */
|
---|
732 | if (CUR_CHAR == '\0') {
|
---|
733 | INVOKE_ERROR(FOUND_NULL_BYTE);
|
---|
734 | } else if (CUR_CHAR < 0x20) {
|
---|
735 | INVOKE_ERROR(WEIRD_WHITESPACE);
|
---|
736 | } else {
|
---|
737 | INVOKE_ERROR(SPECIAL_EXPECTED);
|
---|
738 | }
|
---|
739 | }
|
---|
740 | ENSURE_HVAL;
|
---|
741 | state->nelem++;
|
---|
742 | if (!jsn->can_insert) {
|
---|
743 | INVOKE_ERROR(CANT_INSERT);
|
---|
744 | }
|
---|
745 | STACK_PUSH;
|
---|
746 | state->type = JSONSL_T_SPECIAL;
|
---|
747 | state->special_flags = special_flags;
|
---|
748 | STATE_SPECIAL_LENGTH = 1;
|
---|
749 |
|
---|
750 | if (special_flags == JSONSL_SPECIALf_UNSIGNED) {
|
---|
751 | state->nelem = CUR_CHAR - 0x30;
|
---|
752 | STATE_NUM_LAST = '1';
|
---|
753 | } else {
|
---|
754 | STATE_NUM_LAST = '-';
|
---|
755 | state->nelem = 0;
|
---|
756 | }
|
---|
757 | DO_CALLBACK(SPECIAL, PUSH);
|
---|
758 | }
|
---|
759 | CONTINUE_NEXT_CHAR();
|
---|
760 | }
|
---|
761 | }
|
---|
762 | }
|
---|
763 |
|
---|
764 | JSONSL_API
|
---|
765 | const char* jsonsl_strerror(jsonsl_error_t err)
|
---|
766 | {
|
---|
767 | if (err == JSONSL_ERROR_SUCCESS) {
|
---|
768 | return "SUCCESS";
|
---|
769 | }
|
---|
770 | #define X(t) \
|
---|
771 | if (err == JSONSL_ERROR_##t) \
|
---|
772 | return #t;
|
---|
773 | JSONSL_XERR;
|
---|
774 | #undef X
|
---|
775 | return "<UNKNOWN_ERROR>";
|
---|
776 | }
|
---|
777 |
|
---|
778 | JSONSL_API
|
---|
779 | const char *jsonsl_strtype(jsonsl_type_t type)
|
---|
780 | {
|
---|
781 | #define X(o,c) \
|
---|
782 | if (type == JSONSL_T_##o) \
|
---|
783 | return #o;
|
---|
784 | JSONSL_XTYPE
|
---|
785 | #undef X
|
---|
786 | return "UNKNOWN TYPE";
|
---|
787 |
|
---|
788 | }
|
---|
789 |
|
---|
790 | /*
|
---|
791 | *
|
---|
792 | * JPR/JSONPointer functions
|
---|
793 | *
|
---|
794 | *
|
---|
795 | */
|
---|
796 | #ifndef JSONSL_NO_JPR
|
---|
797 | static
|
---|
798 | jsonsl_jpr_type_t
|
---|
799 | populate_component(char *in,
|
---|
800 | struct jsonsl_jpr_component_st *component,
|
---|
801 | char **next,
|
---|
802 | jsonsl_error_t *errp)
|
---|
803 | {
|
---|
804 | unsigned long pctval;
|
---|
805 | char *c = NULL, *outp = NULL, *end = NULL;
|
---|
806 | size_t input_len;
|
---|
807 | jsonsl_jpr_type_t ret = JSONSL_PATH_NONE;
|
---|
808 |
|
---|
809 | if (*next == NULL || *(*next) == '\0') {
|
---|
810 | return JSONSL_PATH_NONE;
|
---|
811 | }
|
---|
812 |
|
---|
813 | /* Replace the next / with a NULL */
|
---|
814 | *next = strstr(in, "/");
|
---|
815 | if (*next != NULL) {
|
---|
816 | *(*next) = '\0'; /* drop the forward slash */
|
---|
817 | input_len = *next - in;
|
---|
818 | end = *next;
|
---|
819 | *next += 1; /* next character after the '/' */
|
---|
820 | } else {
|
---|
821 | input_len = strlen(in);
|
---|
822 | end = in + input_len + 1;
|
---|
823 | }
|
---|
824 |
|
---|
825 | component->pstr = in;
|
---|
826 |
|
---|
827 | /* Check for special components of interest */
|
---|
828 | if (*in == JSONSL_PATH_WILDCARD_CHAR && input_len == 1) {
|
---|
829 | /* Lone wildcard */
|
---|
830 | ret = JSONSL_PATH_WILDCARD;
|
---|
831 | goto GT_RET;
|
---|
832 | } else if (isdigit(*in)) {
|
---|
833 | /* ASCII Numeric */
|
---|
834 | char *endptr;
|
---|
835 | component->idx = strtoul(in, &endptr, 10);
|
---|
836 | if (endptr && *endptr == '\0') {
|
---|
837 | ret = JSONSL_PATH_NUMERIC;
|
---|
838 | goto GT_RET;
|
---|
839 | }
|
---|
840 | }
|
---|
841 |
|
---|
842 | /* Default, it's a string */
|
---|
843 | ret = JSONSL_PATH_STRING;
|
---|
844 | for (c = outp = in; c < end; c++, outp++) {
|
---|
845 | char origc;
|
---|
846 | if (*c != '%') {
|
---|
847 | goto GT_ASSIGN;
|
---|
848 | }
|
---|
849 | /*
|
---|
850 | * c = { [+0] = '%', [+1] = 'b', [+2] = 'e', [+3] = '\0' }
|
---|
851 | */
|
---|
852 |
|
---|
853 | /* Need %XX */
|
---|
854 | if (c+2 >= end) {
|
---|
855 | *errp = JSONSL_ERROR_PERCENT_BADHEX;
|
---|
856 | return JSONSL_PATH_INVALID;
|
---|
857 | }
|
---|
858 | if (! (isxdigit(*(c+1)) && isxdigit(*(c+2))) ) {
|
---|
859 | *errp = JSONSL_ERROR_PERCENT_BADHEX;
|
---|
860 | return JSONSL_PATH_INVALID;
|
---|
861 | }
|
---|
862 |
|
---|
863 | /* Temporarily null-terminate the characters */
|
---|
864 | origc = *(c+3);
|
---|
865 | *(c+3) = '\0';
|
---|
866 | pctval = strtoul(c+1, NULL, 16);
|
---|
867 | *(c+3) = origc;
|
---|
868 |
|
---|
869 | *outp = (char) pctval;
|
---|
870 | c += 2;
|
---|
871 | continue;
|
---|
872 |
|
---|
873 | GT_ASSIGN:
|
---|
874 | *outp = *c;
|
---|
875 | }
|
---|
876 | /* Null-terminate the string */
|
---|
877 | for (; outp < c; outp++) {
|
---|
878 | *outp = '\0';
|
---|
879 | }
|
---|
880 |
|
---|
881 | GT_RET:
|
---|
882 | component->ptype = ret;
|
---|
883 | if (ret != JSONSL_PATH_WILDCARD) {
|
---|
884 | component->len = strlen(component->pstr);
|
---|
885 | }
|
---|
886 | return ret;
|
---|
887 | }
|
---|
888 |
|
---|
889 | JSONSL_API
|
---|
890 | jsonsl_jpr_t
|
---|
891 | jsonsl_jpr_new(const char *path, jsonsl_error_t *errp)
|
---|
892 | {
|
---|
893 | char *my_copy = NULL;
|
---|
894 | int count, curidx;
|
---|
895 | struct jsonsl_jpr_st *ret = NULL;
|
---|
896 | struct jsonsl_jpr_component_st *components = NULL;
|
---|
897 | size_t origlen;
|
---|
898 | jsonsl_error_t errstacked;
|
---|
899 |
|
---|
900 | #define JPR_BAIL(err) *errp = err; goto GT_ERROR;
|
---|
901 |
|
---|
902 | if (errp == NULL) {
|
---|
903 | errp = &errstacked;
|
---|
904 | }
|
---|
905 |
|
---|
906 | if (path == NULL || *path != '/') {
|
---|
907 | JPR_BAIL(JSONSL_ERROR_JPR_NOROOT);
|
---|
908 | }
|
---|
909 |
|
---|
910 | count = 1;
|
---|
911 | path++;
|
---|
912 | {
|
---|
913 | const char *c = path;
|
---|
914 | for (; *c; c++) {
|
---|
915 | if (*c == '/') {
|
---|
916 | count++;
|
---|
917 | if (*(c+1) == '/') {
|
---|
918 | JPR_BAIL(JSONSL_ERROR_JPR_DUPSLASH);
|
---|
919 | }
|
---|
920 | }
|
---|
921 | }
|
---|
922 | }
|
---|
923 | if(*path) {
|
---|
924 | count++;
|
---|
925 | }
|
---|
926 |
|
---|
927 | components = (struct jsonsl_jpr_component_st *)
|
---|
928 | malloc(sizeof(*components) * count);
|
---|
929 | if (!components) {
|
---|
930 | JPR_BAIL(JSONSL_ERROR_ENOMEM);
|
---|
931 | }
|
---|
932 |
|
---|
933 | my_copy = (char *)malloc(strlen(path) + 1);
|
---|
934 | if (!my_copy) {
|
---|
935 | JPR_BAIL(JSONSL_ERROR_ENOMEM);
|
---|
936 | }
|
---|
937 |
|
---|
938 | strcpy(my_copy, path);
|
---|
939 |
|
---|
940 | components[0].ptype = JSONSL_PATH_ROOT;
|
---|
941 |
|
---|
942 | if (*my_copy) {
|
---|
943 | char *cur = my_copy;
|
---|
944 | int pathret = JSONSL_PATH_STRING;
|
---|
945 | curidx = 1;
|
---|
946 | while (curidx < count) {
|
---|
947 | pathret = populate_component(cur, components + curidx, &cur, errp);
|
---|
948 | if (pathret > 0) {
|
---|
949 | curidx++;
|
---|
950 | } else {
|
---|
951 | break;
|
---|
952 | }
|
---|
953 | }
|
---|
954 |
|
---|
955 | if (pathret == JSONSL_PATH_INVALID) {
|
---|
956 | JPR_BAIL(JSONSL_ERROR_JPR_BADPATH);
|
---|
957 | }
|
---|
958 | } else {
|
---|
959 | curidx = 1;
|
---|
960 | }
|
---|
961 |
|
---|
962 | path--; /*revert path to leading '/' */
|
---|
963 | origlen = strlen(path) + 1;
|
---|
964 | ret = (struct jsonsl_jpr_st *)malloc(sizeof(*ret));
|
---|
965 | if (!ret) {
|
---|
966 | JPR_BAIL(JSONSL_ERROR_ENOMEM);
|
---|
967 | }
|
---|
968 | ret->orig = (char *)malloc(origlen);
|
---|
969 | if (!ret->orig) {
|
---|
970 | JPR_BAIL(JSONSL_ERROR_ENOMEM);
|
---|
971 | }
|
---|
972 | ret->components = components;
|
---|
973 | ret->ncomponents = curidx;
|
---|
974 | ret->basestr = my_copy;
|
---|
975 | ret->norig = origlen-1;
|
---|
976 | strcpy(ret->orig, path);
|
---|
977 |
|
---|
978 | return ret;
|
---|
979 |
|
---|
980 | GT_ERROR:
|
---|
981 | free(my_copy);
|
---|
982 | free(components);
|
---|
983 | if (ret) {
|
---|
984 | free(ret->orig);
|
---|
985 | }
|
---|
986 | free(ret);
|
---|
987 | return NULL;
|
---|
988 | #undef JPR_BAIL
|
---|
989 | }
|
---|
990 |
|
---|
991 | void jsonsl_jpr_destroy(jsonsl_jpr_t jpr)
|
---|
992 | {
|
---|
993 | free(jpr->components);
|
---|
994 | free(jpr->basestr);
|
---|
995 | free(jpr->orig);
|
---|
996 | free(jpr);
|
---|
997 | }
|
---|
998 |
|
---|
999 | /**
|
---|
1000 | * Call when there is a possibility of a match, either as a final match or
|
---|
1001 | * as a path within a match
|
---|
1002 | * @param jpr The JPR path
|
---|
1003 | * @param component Component corresponding to the current element
|
---|
1004 | * @param prlevel The level of the *parent*
|
---|
1005 | * @param chtype The type of the child
|
---|
1006 | * @return Match status
|
---|
1007 | */
|
---|
1008 | static jsonsl_jpr_match_t
|
---|
1009 | jsonsl__match_continue(jsonsl_jpr_t jpr,
|
---|
1010 | const struct jsonsl_jpr_component_st *component,
|
---|
1011 | unsigned prlevel, unsigned chtype)
|
---|
1012 | {
|
---|
1013 | const struct jsonsl_jpr_component_st *next_comp = component + 1;
|
---|
1014 | if (prlevel == jpr->ncomponents - 1) {
|
---|
1015 | /* This is the match. Check the expected type of the match against
|
---|
1016 | * the child */
|
---|
1017 | if (jpr->match_type == 0 || jpr->match_type == chtype) {
|
---|
1018 | return JSONSL_MATCH_COMPLETE;
|
---|
1019 | } else {
|
---|
1020 | return JSONSL_MATCH_TYPE_MISMATCH;
|
---|
1021 | }
|
---|
1022 | }
|
---|
1023 | if (chtype == JSONSL_T_LIST) {
|
---|
1024 | if (next_comp->ptype == JSONSL_PATH_NUMERIC) {
|
---|
1025 | return JSONSL_MATCH_POSSIBLE;
|
---|
1026 | } else {
|
---|
1027 | return JSONSL_MATCH_TYPE_MISMATCH;
|
---|
1028 | }
|
---|
1029 | } else if (chtype == JSONSL_T_OBJECT) {
|
---|
1030 | if (next_comp->ptype == JSONSL_PATH_NUMERIC) {
|
---|
1031 | return JSONSL_MATCH_TYPE_MISMATCH;
|
---|
1032 | } else {
|
---|
1033 | return JSONSL_MATCH_POSSIBLE;
|
---|
1034 | }
|
---|
1035 | } else {
|
---|
1036 | return JSONSL_MATCH_TYPE_MISMATCH;
|
---|
1037 | }
|
---|
1038 | }
|
---|
1039 |
|
---|
1040 | JSONSL_API
|
---|
1041 | jsonsl_jpr_match_t
|
---|
1042 | jsonsl_path_match(jsonsl_jpr_t jpr,
|
---|
1043 | const struct jsonsl_state_st *parent,
|
---|
1044 | const struct jsonsl_state_st *child,
|
---|
1045 | const char *key, size_t nkey)
|
---|
1046 | {
|
---|
1047 | const struct jsonsl_jpr_component_st *comp;
|
---|
1048 | if (!parent) {
|
---|
1049 | /* No parent. Return immediately since it's always a match */
|
---|
1050 | return jsonsl__match_continue(jpr, jpr->components, 0, child->type);
|
---|
1051 | }
|
---|
1052 |
|
---|
1053 | comp = jpr->components + parent->level;
|
---|
1054 |
|
---|
1055 | /* note that we don't need to verify the type of the match, this is
|
---|
1056 | * always done through the previous call to jsonsl__match_continue.
|
---|
1057 | * If we are in a POSSIBLE tree then we can be certain the types (at
|
---|
1058 | * least at this level) are correct */
|
---|
1059 | if (parent->type == JSONSL_T_OBJECT) {
|
---|
1060 | if (comp->len != nkey || strncmp(key, comp->pstr, nkey) != 0) {
|
---|
1061 | return JSONSL_MATCH_NOMATCH;
|
---|
1062 | }
|
---|
1063 | } else {
|
---|
1064 | if (comp->idx != parent->nelem - 1) {
|
---|
1065 | return JSONSL_MATCH_NOMATCH;
|
---|
1066 | }
|
---|
1067 | }
|
---|
1068 | return jsonsl__match_continue(jpr, comp, parent->level, child->type);
|
---|
1069 | }
|
---|
1070 |
|
---|
1071 | JSONSL_API
|
---|
1072 | jsonsl_jpr_match_t
|
---|
1073 | jsonsl_jpr_match(jsonsl_jpr_t jpr,
|
---|
1074 | unsigned int parent_type,
|
---|
1075 | unsigned int parent_level,
|
---|
1076 | const char *key,
|
---|
1077 | size_t nkey)
|
---|
1078 | {
|
---|
1079 | /* find our current component. This is the child level */
|
---|
1080 | int cmpret;
|
---|
1081 | struct jsonsl_jpr_component_st *p_component;
|
---|
1082 | p_component = jpr->components + parent_level;
|
---|
1083 |
|
---|
1084 | if (parent_level >= jpr->ncomponents) {
|
---|
1085 | return JSONSL_MATCH_NOMATCH;
|
---|
1086 | }
|
---|
1087 |
|
---|
1088 | /* Lone query for 'root' element. Always matches */
|
---|
1089 | if (parent_level == 0) {
|
---|
1090 | if (jpr->ncomponents == 1) {
|
---|
1091 | return JSONSL_MATCH_COMPLETE;
|
---|
1092 | } else {
|
---|
1093 | return JSONSL_MATCH_POSSIBLE;
|
---|
1094 | }
|
---|
1095 | }
|
---|
1096 |
|
---|
1097 | /* Wildcard, always matches */
|
---|
1098 | if (p_component->ptype == JSONSL_PATH_WILDCARD) {
|
---|
1099 | if (parent_level == jpr->ncomponents-1) {
|
---|
1100 | return JSONSL_MATCH_COMPLETE;
|
---|
1101 | } else {
|
---|
1102 | return JSONSL_MATCH_POSSIBLE;
|
---|
1103 | }
|
---|
1104 | }
|
---|
1105 |
|
---|
1106 | /* Check numeric array index. This gets its special block so we can avoid
|
---|
1107 | * string comparisons */
|
---|
1108 | if (p_component->ptype == JSONSL_PATH_NUMERIC) {
|
---|
1109 | if (parent_type == JSONSL_T_LIST) {
|
---|
1110 | if (p_component->idx != nkey) {
|
---|
1111 | /* Wrong index */
|
---|
1112 | return JSONSL_MATCH_NOMATCH;
|
---|
1113 | } else {
|
---|
1114 | if (parent_level == jpr->ncomponents-1) {
|
---|
1115 | /* This is the last element of the path */
|
---|
1116 | return JSONSL_MATCH_COMPLETE;
|
---|
1117 | } else {
|
---|
1118 | /* Intermediate element */
|
---|
1119 | return JSONSL_MATCH_POSSIBLE;
|
---|
1120 | }
|
---|
1121 | }
|
---|
1122 | } else if (p_component->is_arridx) {
|
---|
1123 | /* Numeric and an array index (set explicitly by user). But not
|
---|
1124 | * a list for a parent */
|
---|
1125 | return JSONSL_MATCH_TYPE_MISMATCH;
|
---|
1126 | }
|
---|
1127 | } else if (parent_type == JSONSL_T_LIST) {
|
---|
1128 | return JSONSL_MATCH_TYPE_MISMATCH;
|
---|
1129 | }
|
---|
1130 |
|
---|
1131 | /* Check lengths */
|
---|
1132 | if (p_component->len != nkey) {
|
---|
1133 | return JSONSL_MATCH_NOMATCH;
|
---|
1134 | }
|
---|
1135 |
|
---|
1136 | /* Check string comparison */
|
---|
1137 | cmpret = strncmp(p_component->pstr, key, nkey);
|
---|
1138 | if (cmpret == 0) {
|
---|
1139 | if (parent_level == jpr->ncomponents-1) {
|
---|
1140 | return JSONSL_MATCH_COMPLETE;
|
---|
1141 | } else {
|
---|
1142 | return JSONSL_MATCH_POSSIBLE;
|
---|
1143 | }
|
---|
1144 | }
|
---|
1145 |
|
---|
1146 | return JSONSL_MATCH_NOMATCH;
|
---|
1147 | }
|
---|
1148 |
|
---|
1149 | JSONSL_API
|
---|
1150 | void jsonsl_jpr_match_state_init(jsonsl_t jsn,
|
---|
1151 | jsonsl_jpr_t *jprs,
|
---|
1152 | size_t njprs)
|
---|
1153 | {
|
---|
1154 | size_t ii, *firstjmp;
|
---|
1155 | if (njprs == 0) {
|
---|
1156 | return;
|
---|
1157 | }
|
---|
1158 | jsn->jprs = (jsonsl_jpr_t *)malloc(sizeof(jsonsl_jpr_t) * njprs);
|
---|
1159 | jsn->jpr_count = njprs;
|
---|
1160 | jsn->jpr_root = (size_t*)calloc(1, sizeof(size_t) * njprs * jsn->levels_max);
|
---|
1161 | memcpy(jsn->jprs, jprs, sizeof(jsonsl_jpr_t) * njprs);
|
---|
1162 | /* Set the initial jump table values */
|
---|
1163 |
|
---|
1164 | firstjmp = jsn->jpr_root;
|
---|
1165 | for (ii = 0; ii < njprs; ii++) {
|
---|
1166 | firstjmp[ii] = ii+1;
|
---|
1167 | }
|
---|
1168 | }
|
---|
1169 |
|
---|
1170 | JSONSL_API
|
---|
1171 | void jsonsl_jpr_match_state_cleanup(jsonsl_t jsn)
|
---|
1172 | {
|
---|
1173 | if (jsn->jpr_count == 0) {
|
---|
1174 | return;
|
---|
1175 | }
|
---|
1176 |
|
---|
1177 | free(jsn->jpr_root);
|
---|
1178 | free(jsn->jprs);
|
---|
1179 | jsn->jprs = NULL;
|
---|
1180 | jsn->jpr_root = NULL;
|
---|
1181 | jsn->jpr_count = 0;
|
---|
1182 | }
|
---|
1183 |
|
---|
1184 | /**
|
---|
1185 | * This function should be called exactly once on each element...
|
---|
1186 | * This should also be called in recursive order, since we rely
|
---|
1187 | * on the parent having been initalized for a match.
|
---|
1188 | *
|
---|
1189 | * Since the parent is checked for a match as well, we maintain a 'serial' counter.
|
---|
1190 | * Whenever we traverse an element, we expect the serial to be the same as a global
|
---|
1191 | * integer. If they do not match, we re-initialize the context, and set the serial.
|
---|
1192 | *
|
---|
1193 | * This ensures a type of consistency without having a proactive reset by the
|
---|
1194 | * main lexer itself.
|
---|
1195 | *
|
---|
1196 | */
|
---|
1197 | JSONSL_API
|
---|
1198 | jsonsl_jpr_t jsonsl_jpr_match_state(jsonsl_t jsn,
|
---|
1199 | struct jsonsl_state_st *state,
|
---|
1200 | const char *key,
|
---|
1201 | size_t nkey,
|
---|
1202 | jsonsl_jpr_match_t *out)
|
---|
1203 | {
|
---|
1204 | struct jsonsl_state_st *parent_state;
|
---|
1205 | jsonsl_jpr_t ret = NULL;
|
---|
1206 |
|
---|
1207 | /* Jump and JPR tables for our own state and the parent state */
|
---|
1208 | size_t *jmptable, *pjmptable;
|
---|
1209 | size_t jmp_cur, ii, ourjmpidx;
|
---|
1210 |
|
---|
1211 | if (!jsn->jpr_root) {
|
---|
1212 | *out = JSONSL_MATCH_NOMATCH;
|
---|
1213 | return NULL;
|
---|
1214 | }
|
---|
1215 |
|
---|
1216 | pjmptable = jsn->jpr_root + (jsn->jpr_count * (state->level-1));
|
---|
1217 | jmptable = pjmptable + jsn->jpr_count;
|
---|
1218 |
|
---|
1219 | /* If the parent cannot match, then invalidate it */
|
---|
1220 | if (*pjmptable == 0) {
|
---|
1221 | *jmptable = 0;
|
---|
1222 | *out = JSONSL_MATCH_NOMATCH;
|
---|
1223 | return NULL;
|
---|
1224 | }
|
---|
1225 |
|
---|
1226 | parent_state = jsn->stack + state->level - 1;
|
---|
1227 |
|
---|
1228 | if (parent_state->type == JSONSL_T_LIST) {
|
---|
1229 | nkey = (size_t) parent_state->nelem;
|
---|
1230 | }
|
---|
1231 |
|
---|
1232 | *jmptable = 0;
|
---|
1233 | ourjmpidx = 0;
|
---|
1234 | memset(jmptable, 0, sizeof(int) * jsn->jpr_count);
|
---|
1235 |
|
---|
1236 | for (ii = 0; ii < jsn->jpr_count; ii++) {
|
---|
1237 | jmp_cur = pjmptable[ii];
|
---|
1238 | if (jmp_cur) {
|
---|
1239 | jsonsl_jpr_t jpr = jsn->jprs[jmp_cur-1];
|
---|
1240 | *out = jsonsl_jpr_match(jpr,
|
---|
1241 | parent_state->type,
|
---|
1242 | parent_state->level,
|
---|
1243 | key, nkey);
|
---|
1244 | if (*out == JSONSL_MATCH_COMPLETE) {
|
---|
1245 | ret = jpr;
|
---|
1246 | *jmptable = 0;
|
---|
1247 | return ret;
|
---|
1248 | } else if (*out == JSONSL_MATCH_POSSIBLE) {
|
---|
1249 | jmptable[ourjmpidx] = ii+1;
|
---|
1250 | ourjmpidx++;
|
---|
1251 | }
|
---|
1252 | } else {
|
---|
1253 | break;
|
---|
1254 | }
|
---|
1255 | }
|
---|
1256 | if (!*jmptable) {
|
---|
1257 | *out = JSONSL_MATCH_NOMATCH;
|
---|
1258 | }
|
---|
1259 | return NULL;
|
---|
1260 | }
|
---|
1261 |
|
---|
1262 | JSONSL_API
|
---|
1263 | const char *jsonsl_strmatchtype(jsonsl_jpr_match_t match)
|
---|
1264 | {
|
---|
1265 | #define X(T,v) \
|
---|
1266 | if ( match == JSONSL_MATCH_##T ) \
|
---|
1267 | return #T;
|
---|
1268 | JSONSL_XMATCH
|
---|
1269 | #undef X
|
---|
1270 | return "<UNKNOWN>";
|
---|
1271 | }
|
---|
1272 |
|
---|
1273 | #endif /* JSONSL_WITH_JPR */
|
---|
1274 |
|
---|
1275 | static char *
|
---|
1276 | jsonsl__writeutf8(uint32_t pt, char *out)
|
---|
1277 | {
|
---|
1278 | #define ADD_OUTPUT(c) *out = (char)(c); out++;
|
---|
1279 |
|
---|
1280 | if (pt < 0x80) {
|
---|
1281 | ADD_OUTPUT(pt);
|
---|
1282 | } else if (pt < 0x800) {
|
---|
1283 | ADD_OUTPUT((pt >> 6) | 0xC0);
|
---|
1284 | ADD_OUTPUT((pt & 0x3F) | 0x80);
|
---|
1285 | } else if (pt < 0x10000) {
|
---|
1286 | ADD_OUTPUT((pt >> 12) | 0xE0);
|
---|
1287 | ADD_OUTPUT(((pt >> 6) & 0x3F) | 0x80);
|
---|
1288 | ADD_OUTPUT((pt & 0x3F) | 0x80);
|
---|
1289 | } else {
|
---|
1290 | ADD_OUTPUT((pt >> 18) | 0xF0);
|
---|
1291 | ADD_OUTPUT(((pt >> 12) & 0x3F) | 0x80);
|
---|
1292 | ADD_OUTPUT(((pt >> 6) & 0x3F) | 0x80);
|
---|
1293 | ADD_OUTPUT((pt & 0x3F) | 0x80);
|
---|
1294 | }
|
---|
1295 | return out;
|
---|
1296 | #undef ADD_OUTPUT
|
---|
1297 | }
|
---|
1298 |
|
---|
1299 | /* Thanks snej (https://github.com/mnunberg/jsonsl/issues/9) */
|
---|
1300 | static int
|
---|
1301 | jsonsl__digit2int(char ch) {
|
---|
1302 | int d = ch - '0';
|
---|
1303 | if ((unsigned) d < 10) {
|
---|
1304 | return d;
|
---|
1305 | }
|
---|
1306 | d = ch - 'a';
|
---|
1307 | if ((unsigned) d < 6) {
|
---|
1308 | return d + 10;
|
---|
1309 | }
|
---|
1310 | d = ch - 'A';
|
---|
1311 | if ((unsigned) d < 6) {
|
---|
1312 | return d + 10;
|
---|
1313 | }
|
---|
1314 | return -1;
|
---|
1315 | }
|
---|
1316 |
|
---|
1317 | /* Assume 's' is at least 4 bytes long */
|
---|
1318 | static int
|
---|
1319 | jsonsl__get_uescape_16(const char *s)
|
---|
1320 | {
|
---|
1321 | int ret = 0;
|
---|
1322 | int cur;
|
---|
1323 |
|
---|
1324 | #define GET_DIGIT(off) \
|
---|
1325 | cur = jsonsl__digit2int(s[off]); \
|
---|
1326 | if (cur == -1) { return -1; } \
|
---|
1327 | ret |= (cur << (12 - (off * 4)));
|
---|
1328 |
|
---|
1329 | GET_DIGIT(0);
|
---|
1330 | GET_DIGIT(1);
|
---|
1331 | GET_DIGIT(2);
|
---|
1332 | GET_DIGIT(3);
|
---|
1333 | #undef GET_DIGIT
|
---|
1334 | return ret;
|
---|
1335 | }
|
---|
1336 |
|
---|
1337 | /**
|
---|
1338 | * Utility function to convert escape sequences
|
---|
1339 | */
|
---|
1340 | JSONSL_API
|
---|
1341 | size_t jsonsl_util_unescape_ex(const char *in,
|
---|
1342 | char *out,
|
---|
1343 | size_t len,
|
---|
1344 | const int toEscape[128],
|
---|
1345 | unsigned *oflags,
|
---|
1346 | jsonsl_error_t *err,
|
---|
1347 | const char **errat)
|
---|
1348 | {
|
---|
1349 | const unsigned char *c = (const unsigned char*)in;
|
---|
1350 | char *begin_p = out;
|
---|
1351 | unsigned oflags_s;
|
---|
1352 | uint16_t last_codepoint = 0;
|
---|
1353 |
|
---|
1354 | if (!oflags) {
|
---|
1355 | oflags = &oflags_s;
|
---|
1356 | }
|
---|
1357 | *oflags = 0;
|
---|
1358 |
|
---|
1359 | #define UNESCAPE_BAIL(e,offset) \
|
---|
1360 | *err = JSONSL_ERROR_##e; \
|
---|
1361 | if (errat) { \
|
---|
1362 | *errat = (const char*)(c+ (ptrdiff_t)(offset)); \
|
---|
1363 | } \
|
---|
1364 | return 0;
|
---|
1365 |
|
---|
1366 | for (; len; len--, c++, out++) {
|
---|
1367 | int uescval;
|
---|
1368 | if (*c != '\\') {
|
---|
1369 | /* Not an escape, so we don't care about this */
|
---|
1370 | goto GT_ASSIGN;
|
---|
1371 | }
|
---|
1372 |
|
---|
1373 | if (len < 2) {
|
---|
1374 | UNESCAPE_BAIL(ESCAPE_INVALID, 0);
|
---|
1375 | }
|
---|
1376 | if (!is_allowed_escape(c[1])) {
|
---|
1377 | UNESCAPE_BAIL(ESCAPE_INVALID, 1)
|
---|
1378 | }
|
---|
1379 | if ((toEscape && toEscape[(unsigned char)c[1] & 0x7f] == 0 &&
|
---|
1380 | c[1] != '\\' && c[1] != '"')) {
|
---|
1381 | /* if we don't want to unescape this string, write the escape sequence to the output */
|
---|
1382 | *out++ = *c++;
|
---|
1383 | --len;
|
---|
1384 | goto GT_ASSIGN;
|
---|
1385 | }
|
---|
1386 |
|
---|
1387 | if (c[1] != 'u') {
|
---|
1388 | /* simple skip-and-replace using pre-defined maps.
|
---|
1389 | * TODO: should the maps actually reflect the desired
|
---|
1390 | * replacement character in toEscape?
|
---|
1391 | */
|
---|
1392 | char esctmp = get_escape_equiv(c[1]);
|
---|
1393 | if (esctmp) {
|
---|
1394 | /* Check if there is a corresponding replacement */
|
---|
1395 | *out = esctmp;
|
---|
1396 | } else {
|
---|
1397 | /* Just gobble up the 'reverse-solidus' */
|
---|
1398 | *out = c[1];
|
---|
1399 | }
|
---|
1400 | len--;
|
---|
1401 | c++;
|
---|
1402 | /* do not assign, just continue */
|
---|
1403 | continue;
|
---|
1404 | }
|
---|
1405 |
|
---|
1406 | /* next == 'u' */
|
---|
1407 | if (len < 6) {
|
---|
1408 | /* Need at least six characters.. */
|
---|
1409 | UNESCAPE_BAIL(UESCAPE_TOOSHORT, 2);
|
---|
1410 | }
|
---|
1411 |
|
---|
1412 | uescval = jsonsl__get_uescape_16((const char *)c + 2);
|
---|
1413 | if (uescval == -1) {
|
---|
1414 | UNESCAPE_BAIL(PERCENT_BADHEX, -1);
|
---|
1415 | }
|
---|
1416 |
|
---|
1417 | if (last_codepoint) {
|
---|
1418 | uint16_t w1 = last_codepoint, w2 = (uint16_t)uescval;
|
---|
1419 | uint32_t cp;
|
---|
1420 |
|
---|
1421 | if (uescval < 0xDC00 || uescval > 0xDFFF) {
|
---|
1422 | UNESCAPE_BAIL(INVALID_CODEPOINT, -1);
|
---|
1423 | }
|
---|
1424 |
|
---|
1425 | cp = (w1 & 0x3FF) << 10;
|
---|
1426 | cp |= (w2 & 0x3FF);
|
---|
1427 | cp += 0x10000;
|
---|
1428 |
|
---|
1429 | out = jsonsl__writeutf8(cp, out) - 1;
|
---|
1430 | last_codepoint = 0;
|
---|
1431 |
|
---|
1432 | } else if (uescval < 0xD800 || uescval > 0xDFFF) {
|
---|
1433 | *oflags |= JSONSL_SPECIALf_NONASCII;
|
---|
1434 | out = jsonsl__writeutf8(uescval, out) - 1;
|
---|
1435 |
|
---|
1436 | } else if (uescval < 0xDC00) {
|
---|
1437 | *oflags |= JSONSL_SPECIALf_NONASCII;
|
---|
1438 | last_codepoint = (uint16_t)uescval;
|
---|
1439 | out--;
|
---|
1440 | } else {
|
---|
1441 | UNESCAPE_BAIL(INVALID_CODEPOINT, 2);
|
---|
1442 | }
|
---|
1443 |
|
---|
1444 | /* Post uescape cleanup */
|
---|
1445 | len -= 5; /* Gobble up 5 chars after 'u' */
|
---|
1446 | c += 5;
|
---|
1447 | continue;
|
---|
1448 |
|
---|
1449 | /* Only reached by previous branches */
|
---|
1450 | GT_ASSIGN:
|
---|
1451 | *out = *c;
|
---|
1452 | }
|
---|
1453 |
|
---|
1454 | if (last_codepoint) {
|
---|
1455 | *err = JSONSL_ERROR_INVALID_CODEPOINT;
|
---|
1456 | return 0;
|
---|
1457 | }
|
---|
1458 |
|
---|
1459 | *err = JSONSL_ERROR_SUCCESS;
|
---|
1460 | return out - begin_p;
|
---|
1461 | }
|
---|
1462 |
|
---|
1463 | /**
|
---|
1464 | * Character Table definitions.
|
---|
1465 | * These were all generated via srcutil/genchartables.pl
|
---|
1466 | */
|
---|
1467 |
|
---|
1468 | /**
|
---|
1469 | * This table contains the beginnings of non-string
|
---|
1470 | * allowable (bareword) values.
|
---|
1471 | */
|
---|
1472 | static unsigned short Special_Table[0x100] = {
|
---|
1473 | /* 0x00 */ 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, /* 0x1f */
|
---|
1474 | /* 0x20 */ 0,0,0,0,0,0,0,0,0,0,0,0,0, /* 0x2c */
|
---|
1475 | /* 0x2d */ JSONSL_SPECIALf_DASH /* <-> */, /* 0x2d */
|
---|
1476 | /* 0x2e */ 0,0, /* 0x2f */
|
---|
1477 | /* 0x30 */ JSONSL_SPECIALf_ZERO /* <0> */, /* 0x30 */
|
---|
1478 | /* 0x31 */ JSONSL_SPECIALf_UNSIGNED /* <1> */, /* 0x31 */
|
---|
1479 | /* 0x32 */ JSONSL_SPECIALf_UNSIGNED /* <2> */, /* 0x32 */
|
---|
1480 | /* 0x33 */ JSONSL_SPECIALf_UNSIGNED /* <3> */, /* 0x33 */
|
---|
1481 | /* 0x34 */ JSONSL_SPECIALf_UNSIGNED /* <4> */, /* 0x34 */
|
---|
1482 | /* 0x35 */ JSONSL_SPECIALf_UNSIGNED /* <5> */, /* 0x35 */
|
---|
1483 | /* 0x36 */ JSONSL_SPECIALf_UNSIGNED /* <6> */, /* 0x36 */
|
---|
1484 | /* 0x37 */ JSONSL_SPECIALf_UNSIGNED /* <7> */, /* 0x37 */
|
---|
1485 | /* 0x38 */ JSONSL_SPECIALf_UNSIGNED /* <8> */, /* 0x38 */
|
---|
1486 | /* 0x39 */ JSONSL_SPECIALf_UNSIGNED /* <9> */, /* 0x39 */
|
---|
1487 | /* 0x3a */ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 0x48 */
|
---|
1488 | /* 0x49 */ JSONSL__INF_PROXY /* <I> */, /* 0x49 */
|
---|
1489 | /* 0x4a */ 0,0,0,0, /* 0x4d */
|
---|
1490 | /* 0x4e */ JSONSL__NAN_PROXY /* <N> */, /* 0x4e */
|
---|
1491 | /* 0x4f */ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 0x65 */
|
---|
1492 | /* 0x66 */ JSONSL_SPECIALf_FALSE /* <f> */, /* 0x66 */
|
---|
1493 | /* 0x67 */ 0,0, /* 0x68 */
|
---|
1494 | /* 0x69 */ JSONSL__INF_PROXY /* <i> */, /* 0x69 */
|
---|
1495 | /* 0x6a */ 0,0,0,0, /* 0x6d */
|
---|
1496 | /* 0x6e */ JSONSL_SPECIALf_NULL|JSONSL__NAN_PROXY /* <n> */, /* 0x6e */
|
---|
1497 | /* 0x6f */ 0,0,0,0,0, /* 0x73 */
|
---|
1498 | /* 0x74 */ JSONSL_SPECIALf_TRUE /* <t> */, /* 0x74 */
|
---|
1499 | /* 0x75 */ 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, /* 0x94 */
|
---|
1500 | /* 0x95 */ 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, /* 0xb4 */
|
---|
1501 | /* 0xb5 */ 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, /* 0xd4 */
|
---|
1502 | /* 0xd5 */ 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, /* 0xf4 */
|
---|
1503 | /* 0xf5 */ 0,0,0,0,0,0,0,0,0,0, /* 0xfe */
|
---|
1504 | };
|
---|
1505 |
|
---|
1506 | /**
|
---|
1507 | * Contains characters which signal the termination of any of the 'special' bareword
|
---|
1508 | * values.
|
---|
1509 | */
|
---|
1510 | static int Special_Endings[0x100] = {
|
---|
1511 | /* 0x00 */ 0,0,0,0,0,0,0,0,0, /* 0x08 */
|
---|
1512 | /* 0x09 */ 1 /* <TAB> */, /* 0x09 */
|
---|
1513 | /* 0x0a */ 1 /* <LF> */, /* 0x0a */
|
---|
1514 | /* 0x0b */ 0,0, /* 0x0c */
|
---|
1515 | /* 0x0d */ 1 /* <CR> */, /* 0x0d */
|
---|
1516 | /* 0x0e */ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 0x1f */
|
---|
1517 | /* 0x20 */ 1 /* <SP> */, /* 0x20 */
|
---|
1518 | /* 0x21 */ 0, /* 0x21 */
|
---|
1519 | /* 0x22 */ 1 /* " */, /* 0x22 */
|
---|
1520 | /* 0x23 */ 0,0,0,0,0,0,0,0,0, /* 0x2b */
|
---|
1521 | /* 0x2c */ 1 /* , */, /* 0x2c */
|
---|
1522 | /* 0x2d */ 0,0,0,0,0,0,0,0,0,0,0,0,0, /* 0x39 */
|
---|
1523 | /* 0x3a */ 1 /* : */, /* 0x3a */
|
---|
1524 | /* 0x3b */ 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, /* 0x5a */
|
---|
1525 | /* 0x5b */ 1 /* [ */, /* 0x5b */
|
---|
1526 | /* 0x5c */ 1 /* \ */, /* 0x5c */
|
---|
1527 | /* 0x5d */ 1 /* ] */, /* 0x5d */
|
---|
1528 | /* 0x5e */ 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, /* 0x7a */
|
---|
1529 | /* 0x7b */ 1 /* { */, /* 0x7b */
|
---|
1530 | /* 0x7c */ 0, /* 0x7c */
|
---|
1531 | /* 0x7d */ 1 /* } */, /* 0x7d */
|
---|
1532 | /* 0x7e */ 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, /* 0x9d */
|
---|
1533 | /* 0x9e */ 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, /* 0xbd */
|
---|
1534 | /* 0xbe */ 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, /* 0xdd */
|
---|
1535 | /* 0xde */ 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, /* 0xfd */
|
---|
1536 | /* 0xfe */ 0 /* 0xfe */
|
---|
1537 | };
|
---|
1538 |
|
---|
1539 | /**
|
---|
1540 | * This table contains entries for the allowed whitespace as per RFC 4627
|
---|
1541 | */
|
---|
1542 | static int Allowed_Whitespace[0x100] = {
|
---|
1543 | /* 0x00 */ 0,0,0,0,0,0,0,0,0, /* 0x08 */
|
---|
1544 | /* 0x09 */ 1 /* <TAB> */, /* 0x09 */
|
---|
1545 | /* 0x0a */ 1 /* <LF> */, /* 0x0a */
|
---|
1546 | /* 0x0b */ 0,0, /* 0x0c */
|
---|
1547 | /* 0x0d */ 1 /* <CR> */, /* 0x0d */
|
---|
1548 | /* 0x0e */ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 0x1f */
|
---|
1549 | /* 0x20 */ 1 /* <SP> */, /* 0x20 */
|
---|
1550 | /* 0x21 */ 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, /* 0x40 */
|
---|
1551 | /* 0x41 */ 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, /* 0x60 */
|
---|
1552 | /* 0x61 */ 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, /* 0x80 */
|
---|
1553 | /* 0x81 */ 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, /* 0xa0 */
|
---|
1554 | /* 0xa1 */ 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, /* 0xc0 */
|
---|
1555 | /* 0xc1 */ 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, /* 0xe0 */
|
---|
1556 | /* 0xe1 */ 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 /* 0xfe */
|
---|
1557 | };
|
---|
1558 |
|
---|
1559 | static const int String_No_Passthrough[0x100] = {
|
---|
1560 | /* 0x00 */ 1 /* <NUL> */, /* 0x00 */
|
---|
1561 | /* 0x01 */ 1 /* <SOH> */, /* 0x01 */
|
---|
1562 | /* 0x02 */ 1 /* <STX> */, /* 0x02 */
|
---|
1563 | /* 0x03 */ 1 /* <ETX> */, /* 0x03 */
|
---|
1564 | /* 0x04 */ 1 /* <EOT> */, /* 0x04 */
|
---|
1565 | /* 0x05 */ 1 /* <ENQ> */, /* 0x05 */
|
---|
1566 | /* 0x06 */ 1 /* <ACK> */, /* 0x06 */
|
---|
1567 | /* 0x07 */ 1 /* <BEL> */, /* 0x07 */
|
---|
1568 | /* 0x08 */ 1 /* <BS> */, /* 0x08 */
|
---|
1569 | /* 0x09 */ 1 /* <HT> */, /* 0x09 */
|
---|
1570 | /* 0x0a */ 1 /* <LF> */, /* 0x0a */
|
---|
1571 | /* 0x0b */ 1 /* <VT> */, /* 0x0b */
|
---|
1572 | /* 0x0c */ 1 /* <FF> */, /* 0x0c */
|
---|
1573 | /* 0x0d */ 1 /* <CR> */, /* 0x0d */
|
---|
1574 | /* 0x0e */ 1 /* <SO> */, /* 0x0e */
|
---|
1575 | /* 0x0f */ 1 /* <SI> */, /* 0x0f */
|
---|
1576 | /* 0x10 */ 1 /* <DLE> */, /* 0x10 */
|
---|
1577 | /* 0x11 */ 1 /* <DC1> */, /* 0x11 */
|
---|
1578 | /* 0x12 */ 1 /* <DC2> */, /* 0x12 */
|
---|
1579 | /* 0x13 */ 1 /* <DC3> */, /* 0x13 */
|
---|
1580 | /* 0x14 */ 0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 0x21 */
|
---|
1581 | /* 0x22 */ 1 /* <"> */, /* 0x22 */
|
---|
1582 | /* 0x23 */ 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, /* 0x42 */
|
---|
1583 | /* 0x43 */ 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, /* 0x5b */
|
---|
1584 | /* 0x5c */ 1 /* <\> */, /* 0x5c */
|
---|
1585 | /* 0x5d */ 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, /* 0x7c */
|
---|
1586 | /* 0x7d */ 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, /* 0x9c */
|
---|
1587 | /* 0x9d */ 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, /* 0xbc */
|
---|
1588 | /* 0xbd */ 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, /* 0xdc */
|
---|
1589 | /* 0xdd */ 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, /* 0xfc */
|
---|
1590 | /* 0xfd */ 0,0, /* 0xfe */
|
---|
1591 | };
|
---|
1592 |
|
---|
1593 | /**
|
---|
1594 | * Allowable two-character 'common' escapes:
|
---|
1595 | */
|
---|
1596 | static int Allowed_Escapes[0x100] = {
|
---|
1597 | /* 0x00 */ 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, /* 0x1f */
|
---|
1598 | /* 0x20 */ 0,0, /* 0x21 */
|
---|
1599 | /* 0x22 */ 1 /* <"> */, /* 0x22 */
|
---|
1600 | /* 0x23 */ 0,0,0,0,0,0,0,0,0,0,0,0, /* 0x2e */
|
---|
1601 | /* 0x2f */ 1 /* </> */, /* 0x2f */
|
---|
1602 | /* 0x30 */ 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, /* 0x4f */
|
---|
1603 | /* 0x50 */ 0,0,0,0,0,0,0,0,0,0,0,0, /* 0x5b */
|
---|
1604 | /* 0x5c */ 1 /* <\> */, /* 0x5c */
|
---|
1605 | /* 0x5d */ 0,0,0,0,0, /* 0x61 */
|
---|
1606 | /* 0x62 */ 1 /* <b> */, /* 0x62 */
|
---|
1607 | /* 0x63 */ 0,0,0, /* 0x65 */
|
---|
1608 | /* 0x66 */ 1 /* <f> */, /* 0x66 */
|
---|
1609 | /* 0x67 */ 0,0,0,0,0,0,0, /* 0x6d */
|
---|
1610 | /* 0x6e */ 1 /* <n> */, /* 0x6e */
|
---|
1611 | /* 0x6f */ 0,0,0, /* 0x71 */
|
---|
1612 | /* 0x72 */ 1 /* <r> */, /* 0x72 */
|
---|
1613 | /* 0x73 */ 0, /* 0x73 */
|
---|
1614 | /* 0x74 */ 1 /* <t> */, /* 0x74 */
|
---|
1615 | /* 0x75 */ 1 /* <u> */, /* 0x75 */
|
---|
1616 | /* 0x76 */ 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, /* 0x95 */
|
---|
1617 | /* 0x96 */ 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, /* 0xb5 */
|
---|
1618 | /* 0xb6 */ 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, /* 0xd5 */
|
---|
1619 | /* 0xd6 */ 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, /* 0xf5 */
|
---|
1620 | /* 0xf6 */ 0,0,0,0,0,0,0,0,0, /* 0xfe */
|
---|
1621 | };
|
---|
1622 |
|
---|
1623 | /**
|
---|
1624 | * This table contains the _values_ for a given (single) escaped character.
|
---|
1625 | */
|
---|
1626 | static unsigned char Escape_Equivs[0x100] = {
|
---|
1627 | /* 0x00 */ 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, /* 0x1f */
|
---|
1628 | /* 0x20 */ 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, /* 0x3f */
|
---|
1629 | /* 0x40 */ 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, /* 0x5f */
|
---|
1630 | /* 0x60 */ 0,0, /* 0x61 */
|
---|
1631 | /* 0x62 */ 8 /* <b> */, /* 0x62 */
|
---|
1632 | /* 0x63 */ 0,0,0, /* 0x65 */
|
---|
1633 | /* 0x66 */ 12 /* <f> */, /* 0x66 */
|
---|
1634 | /* 0x67 */ 0,0,0,0,0,0,0, /* 0x6d */
|
---|
1635 | /* 0x6e */ 10 /* <n> */, /* 0x6e */
|
---|
1636 | /* 0x6f */ 0,0,0, /* 0x71 */
|
---|
1637 | /* 0x72 */ 13 /* <r> */, /* 0x72 */
|
---|
1638 | /* 0x73 */ 0, /* 0x73 */
|
---|
1639 | /* 0x74 */ 9 /* <t> */, /* 0x74 */
|
---|
1640 | /* 0x75 */ 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, /* 0x94 */
|
---|
1641 | /* 0x95 */ 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, /* 0xb4 */
|
---|
1642 | /* 0xb5 */ 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, /* 0xd4 */
|
---|
1643 | /* 0xd5 */ 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, /* 0xf4 */
|
---|
1644 | /* 0xf5 */ 0,0,0,0,0,0,0,0,0,0 /* 0xfe */
|
---|
1645 | };
|
---|
1646 |
|
---|
1647 | /* Definitions of above-declared static functions */
|
---|
1648 | static char get_escape_equiv(unsigned c) {
|
---|
1649 | return Escape_Equivs[c & 0xff];
|
---|
1650 | }
|
---|
1651 | static unsigned extract_special(unsigned c) {
|
---|
1652 | return Special_Table[c & 0xff];
|
---|
1653 | }
|
---|
1654 | static int is_special_end(unsigned c) {
|
---|
1655 | return Special_Endings[c & 0xff];
|
---|
1656 | }
|
---|
1657 | static int is_allowed_whitespace(unsigned c) {
|
---|
1658 | return c == ' ' || Allowed_Whitespace[c & 0xff];
|
---|
1659 | }
|
---|
1660 | static int is_allowed_escape(unsigned c) {
|
---|
1661 | return Allowed_Escapes[c & 0xff];
|
---|
1662 | }
|
---|
1663 | static int is_simple_char(unsigned c) {
|
---|
1664 | return !String_No_Passthrough[c & 0xff];
|
---|
1665 | }
|
---|
1666 |
|
---|
1667 | /* Clean up all our macros! */
|
---|
1668 | #undef INCR_METRIC
|
---|
1669 | #undef INCR_GENERIC
|
---|
1670 | #undef INCR_STRINGY_CATCH
|
---|
1671 | #undef CASE_DIGITS
|
---|
1672 | #undef INVOKE_ERROR
|
---|
1673 | #undef STACK_PUSH
|
---|
1674 | #undef STACK_POP_NOPOS
|
---|
1675 | #undef STACK_POP
|
---|
1676 | #undef CALLBACK_AND_POP_NOPOS
|
---|
1677 | #undef CALLBACK_AND_POP
|
---|
1678 | #undef SPECIAL_POP
|
---|
1679 | #undef CUR_CHAR
|
---|
1680 | #undef DO_CALLBACK
|
---|
1681 | #undef ENSURE_HVAL
|
---|
1682 | #undef VERIFY_SPECIAL
|
---|
1683 | #undef STATE_SPECIAL_LENGTH
|
---|
1684 | #undef IS_NORMAL_NUMBER
|
---|
1685 | #undef STATE_NUM_LAST
|
---|
1686 | #undef FASTPARSE_EXHAUSTED
|
---|
1687 | #undef FASTPARSE_BREAK
|
---|