Michael Clark | f0d0888 | 2007-03-13 08:26:18 +0000 | [diff] [blame] | 1 | /* |
Michael Clark | a850f8e | 2007-03-13 08:26:26 +0000 | [diff] [blame] | 2 | * $Id: json_tokener.c,v 1.20 2006/07/25 03:24:50 mclark Exp $ |
Michael Clark | f0d0888 | 2007-03-13 08:26:18 +0000 | [diff] [blame] | 3 | * |
Michael Clark | f6a6e48 | 2007-03-13 08:26:23 +0000 | [diff] [blame] | 4 | * Copyright (c) 2004, 2005 Metaparadigm Pte. Ltd. |
Michael Clark | f0d0888 | 2007-03-13 08:26:18 +0000 | [diff] [blame] | 5 | * Michael Clark <michael@metaparadigm.com> |
| 6 | * |
Michael Clark | f6a6e48 | 2007-03-13 08:26:23 +0000 | [diff] [blame] | 7 | * This library is free software; you can redistribute it and/or modify |
| 8 | * it under the terms of the MIT license. See COPYING for details. |
Michael Clark | f0d0888 | 2007-03-13 08:26:18 +0000 | [diff] [blame] | 9 | * |
Michael Clark | 95f55a7 | 2009-04-27 08:16:58 +0000 | [diff] [blame] | 10 | * |
| 11 | * Copyright (c) 2008-2009 Yahoo! Inc. All rights reserved. |
| 12 | * The copyrights to the contents of this file are licensed under the MIT License |
| 13 | * (http://www.opensource.org/licenses/mit-license.php) |
Michael Clark | f0d0888 | 2007-03-13 08:26:18 +0000 | [diff] [blame] | 14 | */ |
| 15 | |
Michael Clark | 4504df7 | 2007-03-13 08:26:20 +0000 | [diff] [blame] | 16 | #include "config.h" |
| 17 | |
Michael Clark | f0d0888 | 2007-03-13 08:26:18 +0000 | [diff] [blame] | 18 | #include <stdio.h> |
| 19 | #include <stdlib.h> |
Michael Clark | c8f4a6e | 2007-12-07 02:44:24 +0000 | [diff] [blame] | 20 | #include <stddef.h> |
Michael Clark | f0d0888 | 2007-03-13 08:26:18 +0000 | [diff] [blame] | 21 | #include <ctype.h> |
| 22 | #include <string.h> |
| 23 | |
| 24 | #include "bits.h" |
| 25 | #include "debug.h" |
| 26 | #include "printbuf.h" |
| 27 | #include "arraylist.h" |
| 28 | #include "json_object.h" |
| 29 | #include "json_tokener.h" |
| 30 | |
Michael Clark | a850f8e | 2007-03-13 08:26:26 +0000 | [diff] [blame] | 31 | |
Michael Clark | 837240f | 2007-03-13 08:26:25 +0000 | [diff] [blame] | 32 | #if !HAVE_STRNCASECMP && defined(_MSC_VER) |
| 33 | /* MSC has the version as _strnicmp */ |
| 34 | # define strncasecmp _strnicmp |
| 35 | #elif !HAVE_STRNCASECMP |
| 36 | # error You do not have strncasecmp on your system. |
| 37 | #endif /* HAVE_STRNCASECMP */ |
| 38 | |
| 39 | |
Michael Clark | a850f8e | 2007-03-13 08:26:26 +0000 | [diff] [blame] | 40 | static const char* json_null_str = "null"; |
| 41 | static const char* json_true_str = "true"; |
| 42 | static const char* json_false_str = "false"; |
Michael Clark | f0d0888 | 2007-03-13 08:26:18 +0000 | [diff] [blame] | 43 | |
Michael Clark | a850f8e | 2007-03-13 08:26:26 +0000 | [diff] [blame] | 44 | const char* json_tokener_errors[] = { |
| 45 | "success", |
| 46 | "continue", |
| 47 | "nesting to deep", |
| 48 | "unexpected end of data", |
| 49 | "unexpected character", |
| 50 | "null expected", |
| 51 | "boolean expected", |
| 52 | "number expected", |
| 53 | "array value separator ',' expected", |
| 54 | "quoted object property name expected", |
| 55 | "object property name separator ':' expected", |
| 56 | "object value separator ',' expected", |
| 57 | "invalid string sequence", |
| 58 | "expected comment", |
| 59 | }; |
| 60 | |
| 61 | |
Michael Clark | e8de078 | 2009-02-25 01:45:00 +0000 | [diff] [blame] | 62 | struct json_tokener* json_tokener_new(void) |
Michael Clark | f0d0888 | 2007-03-13 08:26:18 +0000 | [diff] [blame] | 63 | { |
Michael Clark | aaec1ef | 2009-02-25 02:31:32 +0000 | [diff] [blame] | 64 | struct json_tokener *tok; |
| 65 | |
| 66 | tok = (struct json_tokener*)calloc(1, sizeof(struct json_tokener)); |
Christopher Watford | 543bb14 | 2009-07-08 03:46:10 +0000 | [diff] [blame] | 67 | if (!tok) return NULL; |
Michael Clark | a850f8e | 2007-03-13 08:26:26 +0000 | [diff] [blame] | 68 | tok->pb = printbuf_new(); |
| 69 | json_tokener_reset(tok); |
| 70 | return tok; |
| 71 | } |
| 72 | |
| 73 | void json_tokener_free(struct json_tokener *tok) |
| 74 | { |
| 75 | json_tokener_reset(tok); |
| 76 | if(tok) printbuf_free(tok->pb); |
| 77 | free(tok); |
| 78 | } |
| 79 | |
| 80 | static void json_tokener_reset_level(struct json_tokener *tok, int depth) |
| 81 | { |
| 82 | tok->stack[depth].state = json_tokener_state_eatws; |
| 83 | tok->stack[depth].saved_state = json_tokener_state_start; |
| 84 | json_object_put(tok->stack[depth].current); |
| 85 | tok->stack[depth].current = NULL; |
| 86 | free(tok->stack[depth].obj_field_name); |
| 87 | tok->stack[depth].obj_field_name = NULL; |
| 88 | } |
| 89 | |
| 90 | void json_tokener_reset(struct json_tokener *tok) |
| 91 | { |
| 92 | int i; |
Michael Clark | 22dee7c | 2009-02-25 01:51:40 +0000 | [diff] [blame] | 93 | if (!tok) |
| 94 | return; |
| 95 | |
Michael Clark | a850f8e | 2007-03-13 08:26:26 +0000 | [diff] [blame] | 96 | for(i = tok->depth; i >= 0; i--) |
| 97 | json_tokener_reset_level(tok, i); |
| 98 | tok->depth = 0; |
| 99 | tok->err = json_tokener_success; |
| 100 | } |
| 101 | |
Christopher Watford | b1a22ac | 2009-07-08 04:02:05 +0000 | [diff] [blame^] | 102 | struct json_object* json_tokener_parse(const char *str) |
Michael Clark | a850f8e | 2007-03-13 08:26:26 +0000 | [diff] [blame] | 103 | { |
| 104 | struct json_tokener* tok; |
Michael Clark | f0d0888 | 2007-03-13 08:26:18 +0000 | [diff] [blame] | 105 | struct json_object* obj; |
| 106 | |
Michael Clark | a850f8e | 2007-03-13 08:26:26 +0000 | [diff] [blame] | 107 | tok = json_tokener_new(); |
| 108 | obj = json_tokener_parse_ex(tok, str, -1); |
| 109 | if(tok->err != json_tokener_success) |
Michael Clark | aaec1ef | 2009-02-25 02:31:32 +0000 | [diff] [blame] | 110 | obj = (struct json_object*)error_ptr(-tok->err); |
Michael Clark | a850f8e | 2007-03-13 08:26:26 +0000 | [diff] [blame] | 111 | json_tokener_free(tok); |
Michael Clark | f0d0888 | 2007-03-13 08:26:18 +0000 | [diff] [blame] | 112 | return obj; |
| 113 | } |
| 114 | |
Michael Clark | a850f8e | 2007-03-13 08:26:26 +0000 | [diff] [blame] | 115 | |
Michael Clark | 4504df7 | 2007-03-13 08:26:20 +0000 | [diff] [blame] | 116 | #if !HAVE_STRNDUP |
| 117 | /* CAW: compliant version of strndup() */ |
| 118 | char* strndup(const char* str, size_t n) |
| 119 | { |
Michael Clark | a850f8e | 2007-03-13 08:26:26 +0000 | [diff] [blame] | 120 | if(str) { |
| 121 | size_t len = strlen(str); |
| 122 | size_t nn = min(len,n); |
| 123 | char* s = (char*)malloc(sizeof(char) * (nn + 1)); |
Michael Clark | 4504df7 | 2007-03-13 08:26:20 +0000 | [diff] [blame] | 124 | |
Michael Clark | a850f8e | 2007-03-13 08:26:26 +0000 | [diff] [blame] | 125 | if(s) { |
| 126 | memcpy(s, str, nn); |
| 127 | s[nn] = '\0'; |
| 128 | } |
Michael Clark | 4504df7 | 2007-03-13 08:26:20 +0000 | [diff] [blame] | 129 | |
Michael Clark | a850f8e | 2007-03-13 08:26:26 +0000 | [diff] [blame] | 130 | return s; |
| 131 | } |
Michael Clark | 4504df7 | 2007-03-13 08:26:20 +0000 | [diff] [blame] | 132 | |
Michael Clark | a850f8e | 2007-03-13 08:26:26 +0000 | [diff] [blame] | 133 | return NULL; |
Michael Clark | 4504df7 | 2007-03-13 08:26:20 +0000 | [diff] [blame] | 134 | } |
| 135 | #endif |
| 136 | |
Michael Clark | a850f8e | 2007-03-13 08:26:26 +0000 | [diff] [blame] | 137 | |
| 138 | #define state tok->stack[tok->depth].state |
| 139 | #define saved_state tok->stack[tok->depth].saved_state |
| 140 | #define current tok->stack[tok->depth].current |
| 141 | #define obj_field_name tok->stack[tok->depth].obj_field_name |
| 142 | |
Michael Clark | 95f55a7 | 2009-04-27 08:16:58 +0000 | [diff] [blame] | 143 | /* Optimization: |
| 144 | * json_tokener_parse_ex() consumed a lot of CPU in its main loop, |
| 145 | * iterating character-by character. A large performance boost is |
| 146 | * achieved by using tighter loops to locally handle units such as |
| 147 | * comments and strings. Loops that handle an entire token within |
| 148 | * their scope also gather entire strings and pass them to |
| 149 | * printbuf_memappend() in a single call, rather than calling |
| 150 | * printbuf_memappend() one char at a time. |
| 151 | * |
| 152 | * POP_CHAR() and ADVANCE_CHAR() macros are used for code that is |
| 153 | * common to both the main loop and the tighter loops. |
| 154 | */ |
| 155 | |
| 156 | /* POP_CHAR(dest, tok) macro: |
| 157 | * Not really a pop()...peeks at the current char and stores it in dest. |
| 158 | * Returns 1 on success, sets tok->err and returns 0 if no more chars. |
| 159 | * Implicit inputs: str, len vars |
| 160 | */ |
| 161 | #define POP_CHAR(dest, tok) \ |
| 162 | (((tok)->char_offset == len) ? \ |
| 163 | (((tok)->depth == 0 && state == json_tokener_state_eatws && saved_state == json_tokener_state_finish) ? \ |
| 164 | (((tok)->err = json_tokener_success), 0) \ |
| 165 | : \ |
| 166 | (((tok)->err = json_tokener_continue), 0) \ |
| 167 | ) : \ |
| 168 | (((dest) = *str), 1) \ |
| 169 | ) |
| 170 | |
| 171 | /* ADVANCE_CHAR() macro: |
| 172 | * Incrementes str & tok->char_offset. |
| 173 | * For convenience of existing conditionals, returns the old value of c (0 on eof) |
| 174 | * Implicit inputs: c var |
| 175 | */ |
| 176 | #define ADVANCE_CHAR(str, tok) \ |
| 177 | ( ++(str), ((tok)->char_offset)++, c) |
| 178 | |
| 179 | /* End optimization macro defs */ |
| 180 | |
| 181 | |
Michael Clark | a850f8e | 2007-03-13 08:26:26 +0000 | [diff] [blame] | 182 | struct json_object* json_tokener_parse_ex(struct json_tokener *tok, |
Christopher Watford | b1a22ac | 2009-07-08 04:02:05 +0000 | [diff] [blame^] | 183 | const char *str, int len) |
Michael Clark | f0d0888 | 2007-03-13 08:26:18 +0000 | [diff] [blame] | 184 | { |
Michael Clark | a850f8e | 2007-03-13 08:26:26 +0000 | [diff] [blame] | 185 | struct json_object *obj = NULL; |
Michael Clark | 95f55a7 | 2009-04-27 08:16:58 +0000 | [diff] [blame] | 186 | char c = '\1'; |
Michael Clark | f0d0888 | 2007-03-13 08:26:18 +0000 | [diff] [blame] | 187 | |
Michael Clark | a850f8e | 2007-03-13 08:26:26 +0000 | [diff] [blame] | 188 | tok->char_offset = 0; |
| 189 | tok->err = json_tokener_success; |
Michael Clark | f0d0888 | 2007-03-13 08:26:18 +0000 | [diff] [blame] | 190 | |
Michael Clark | 95f55a7 | 2009-04-27 08:16:58 +0000 | [diff] [blame] | 191 | while (POP_CHAR(c, tok)) { |
Michael Clark | a850f8e | 2007-03-13 08:26:26 +0000 | [diff] [blame] | 192 | |
Michael Clark | a850f8e | 2007-03-13 08:26:26 +0000 | [diff] [blame] | 193 | redo_char: |
Michael Clark | f0d0888 | 2007-03-13 08:26:18 +0000 | [diff] [blame] | 194 | switch(state) { |
| 195 | |
| 196 | case json_tokener_state_eatws: |
Michael Clark | 95f55a7 | 2009-04-27 08:16:58 +0000 | [diff] [blame] | 197 | /* Advance until we change state */ |
| 198 | while (isspace(c)) { |
| 199 | if ((!ADVANCE_CHAR(str, tok)) || (!POP_CHAR(c, tok))) |
| 200 | goto out; |
| 201 | } |
| 202 | if(c == '/') { |
Michael Clark | a850f8e | 2007-03-13 08:26:26 +0000 | [diff] [blame] | 203 | printbuf_reset(tok->pb); |
Michael Clark | 95f55a7 | 2009-04-27 08:16:58 +0000 | [diff] [blame] | 204 | printbuf_memappend_fast(tok->pb, &c, 1); |
Michael Clark | f0d0888 | 2007-03-13 08:26:18 +0000 | [diff] [blame] | 205 | state = json_tokener_state_comment_start; |
Michael Clark | f0d0888 | 2007-03-13 08:26:18 +0000 | [diff] [blame] | 206 | } else { |
| 207 | state = saved_state; |
Michael Clark | a850f8e | 2007-03-13 08:26:26 +0000 | [diff] [blame] | 208 | goto redo_char; |
Michael Clark | f0d0888 | 2007-03-13 08:26:18 +0000 | [diff] [blame] | 209 | } |
| 210 | break; |
| 211 | |
| 212 | case json_tokener_state_start: |
| 213 | switch(c) { |
| 214 | case '{': |
| 215 | state = json_tokener_state_eatws; |
Michael Clark | a850f8e | 2007-03-13 08:26:26 +0000 | [diff] [blame] | 216 | saved_state = json_tokener_state_object_field_start; |
Michael Clark | f0d0888 | 2007-03-13 08:26:18 +0000 | [diff] [blame] | 217 | current = json_object_new_object(); |
Michael Clark | f0d0888 | 2007-03-13 08:26:18 +0000 | [diff] [blame] | 218 | break; |
| 219 | case '[': |
| 220 | state = json_tokener_state_eatws; |
| 221 | saved_state = json_tokener_state_array; |
| 222 | current = json_object_new_array(); |
Michael Clark | f0d0888 | 2007-03-13 08:26:18 +0000 | [diff] [blame] | 223 | break; |
| 224 | case 'N': |
| 225 | case 'n': |
| 226 | state = json_tokener_state_null; |
Michael Clark | a850f8e | 2007-03-13 08:26:26 +0000 | [diff] [blame] | 227 | printbuf_reset(tok->pb); |
| 228 | tok->st_pos = 0; |
| 229 | goto redo_char; |
Michael Clark | f0d0888 | 2007-03-13 08:26:18 +0000 | [diff] [blame] | 230 | case '"': |
| 231 | case '\'': |
Michael Clark | f0d0888 | 2007-03-13 08:26:18 +0000 | [diff] [blame] | 232 | state = json_tokener_state_string; |
Michael Clark | a850f8e | 2007-03-13 08:26:26 +0000 | [diff] [blame] | 233 | printbuf_reset(tok->pb); |
| 234 | tok->quote_char = c; |
Michael Clark | f0d0888 | 2007-03-13 08:26:18 +0000 | [diff] [blame] | 235 | break; |
| 236 | case 'T': |
| 237 | case 't': |
| 238 | case 'F': |
| 239 | case 'f': |
| 240 | state = json_tokener_state_boolean; |
Michael Clark | a850f8e | 2007-03-13 08:26:26 +0000 | [diff] [blame] | 241 | printbuf_reset(tok->pb); |
| 242 | tok->st_pos = 0; |
| 243 | goto redo_char; |
Michael Clark | 4504df7 | 2007-03-13 08:26:20 +0000 | [diff] [blame] | 244 | #if defined(__GNUC__) |
| 245 | case '0' ... '9': |
| 246 | #else |
| 247 | case '0': |
| 248 | case '1': |
| 249 | case '2': |
| 250 | case '3': |
| 251 | case '4': |
| 252 | case '5': |
| 253 | case '6': |
| 254 | case '7': |
| 255 | case '8': |
| 256 | case '9': |
| 257 | #endif |
Michael Clark | f0d0888 | 2007-03-13 08:26:18 +0000 | [diff] [blame] | 258 | case '-': |
Michael Clark | f0d0888 | 2007-03-13 08:26:18 +0000 | [diff] [blame] | 259 | state = json_tokener_state_number; |
Michael Clark | a850f8e | 2007-03-13 08:26:26 +0000 | [diff] [blame] | 260 | printbuf_reset(tok->pb); |
| 261 | tok->is_double = 0; |
| 262 | goto redo_char; |
Michael Clark | f0d0888 | 2007-03-13 08:26:18 +0000 | [diff] [blame] | 263 | default: |
Michael Clark | a850f8e | 2007-03-13 08:26:26 +0000 | [diff] [blame] | 264 | tok->err = json_tokener_error_parse_unexpected; |
Michael Clark | f0d0888 | 2007-03-13 08:26:18 +0000 | [diff] [blame] | 265 | goto out; |
| 266 | } |
| 267 | break; |
| 268 | |
| 269 | case json_tokener_state_finish: |
Michael Clark | a850f8e | 2007-03-13 08:26:26 +0000 | [diff] [blame] | 270 | if(tok->depth == 0) goto out; |
| 271 | obj = json_object_get(current); |
| 272 | json_tokener_reset_level(tok, tok->depth); |
| 273 | tok->depth--; |
| 274 | goto redo_char; |
Michael Clark | f0d0888 | 2007-03-13 08:26:18 +0000 | [diff] [blame] | 275 | |
| 276 | case json_tokener_state_null: |
Michael Clark | 95f55a7 | 2009-04-27 08:16:58 +0000 | [diff] [blame] | 277 | printbuf_memappend_fast(tok->pb, &c, 1); |
Michael Clark | a850f8e | 2007-03-13 08:26:26 +0000 | [diff] [blame] | 278 | if(strncasecmp(json_null_str, tok->pb->buf, |
| 279 | min(tok->st_pos+1, strlen(json_null_str))) == 0) { |
| 280 | if(tok->st_pos == strlen(json_null_str)) { |
| 281 | current = NULL; |
| 282 | saved_state = json_tokener_state_finish; |
| 283 | state = json_tokener_state_eatws; |
| 284 | goto redo_char; |
| 285 | } |
Michael Clark | f0d0888 | 2007-03-13 08:26:18 +0000 | [diff] [blame] | 286 | } else { |
Michael Clark | a850f8e | 2007-03-13 08:26:26 +0000 | [diff] [blame] | 287 | tok->err = json_tokener_error_parse_null; |
| 288 | goto out; |
Michael Clark | f0d0888 | 2007-03-13 08:26:18 +0000 | [diff] [blame] | 289 | } |
Michael Clark | a850f8e | 2007-03-13 08:26:26 +0000 | [diff] [blame] | 290 | tok->st_pos++; |
Michael Clark | f0d0888 | 2007-03-13 08:26:18 +0000 | [diff] [blame] | 291 | break; |
| 292 | |
| 293 | case json_tokener_state_comment_start: |
| 294 | if(c == '*') { |
| 295 | state = json_tokener_state_comment; |
| 296 | } else if(c == '/') { |
| 297 | state = json_tokener_state_comment_eol; |
| 298 | } else { |
Michael Clark | a850f8e | 2007-03-13 08:26:26 +0000 | [diff] [blame] | 299 | tok->err = json_tokener_error_parse_comment; |
Michael Clark | f0d0888 | 2007-03-13 08:26:18 +0000 | [diff] [blame] | 300 | goto out; |
| 301 | } |
Michael Clark | 95f55a7 | 2009-04-27 08:16:58 +0000 | [diff] [blame] | 302 | printbuf_memappend_fast(tok->pb, &c, 1); |
Michael Clark | f0d0888 | 2007-03-13 08:26:18 +0000 | [diff] [blame] | 303 | break; |
| 304 | |
| 305 | case json_tokener_state_comment: |
Michael Clark | 95f55a7 | 2009-04-27 08:16:58 +0000 | [diff] [blame] | 306 | { |
| 307 | /* Advance until we change state */ |
Christopher Watford | b1a22ac | 2009-07-08 04:02:05 +0000 | [diff] [blame^] | 308 | const char *case_start = str; |
Michael Clark | 95f55a7 | 2009-04-27 08:16:58 +0000 | [diff] [blame] | 309 | while(c != '*') { |
| 310 | if (!ADVANCE_CHAR(str, tok) || !POP_CHAR(c, tok)) { |
| 311 | printbuf_memappend_fast(tok->pb, case_start, str-case_start); |
| 312 | goto out; |
| 313 | } |
| 314 | } |
| 315 | printbuf_memappend_fast(tok->pb, case_start, 1+str-case_start); |
| 316 | state = json_tokener_state_comment_end; |
| 317 | } |
| 318 | break; |
Michael Clark | f0d0888 | 2007-03-13 08:26:18 +0000 | [diff] [blame] | 319 | |
| 320 | case json_tokener_state_comment_eol: |
Michael Clark | 95f55a7 | 2009-04-27 08:16:58 +0000 | [diff] [blame] | 321 | { |
| 322 | /* Advance until we change state */ |
Christopher Watford | b1a22ac | 2009-07-08 04:02:05 +0000 | [diff] [blame^] | 323 | const char *case_start = str; |
Michael Clark | 95f55a7 | 2009-04-27 08:16:58 +0000 | [diff] [blame] | 324 | while(c != '\n') { |
| 325 | if (!ADVANCE_CHAR(str, tok) || !POP_CHAR(c, tok)) { |
| 326 | printbuf_memappend_fast(tok->pb, case_start, str-case_start); |
| 327 | goto out; |
| 328 | } |
| 329 | } |
| 330 | printbuf_memappend_fast(tok->pb, case_start, str-case_start); |
Michael Clark | dfaf670 | 2007-10-25 02:26:00 +0000 | [diff] [blame] | 331 | MC_DEBUG("json_tokener_comment: %s\n", tok->pb->buf); |
Michael Clark | f0d0888 | 2007-03-13 08:26:18 +0000 | [diff] [blame] | 332 | state = json_tokener_state_eatws; |
| 333 | } |
Michael Clark | f0d0888 | 2007-03-13 08:26:18 +0000 | [diff] [blame] | 334 | break; |
| 335 | |
| 336 | case json_tokener_state_comment_end: |
Michael Clark | 95f55a7 | 2009-04-27 08:16:58 +0000 | [diff] [blame] | 337 | printbuf_memappend_fast(tok->pb, &c, 1); |
Michael Clark | f0d0888 | 2007-03-13 08:26:18 +0000 | [diff] [blame] | 338 | if(c == '/') { |
Michael Clark | dfaf670 | 2007-10-25 02:26:00 +0000 | [diff] [blame] | 339 | MC_DEBUG("json_tokener_comment: %s\n", tok->pb->buf); |
Michael Clark | f0d0888 | 2007-03-13 08:26:18 +0000 | [diff] [blame] | 340 | state = json_tokener_state_eatws; |
| 341 | } else { |
| 342 | state = json_tokener_state_comment; |
| 343 | } |
Michael Clark | f0d0888 | 2007-03-13 08:26:18 +0000 | [diff] [blame] | 344 | break; |
| 345 | |
| 346 | case json_tokener_state_string: |
Michael Clark | 95f55a7 | 2009-04-27 08:16:58 +0000 | [diff] [blame] | 347 | { |
| 348 | /* Advance until we change state */ |
Christopher Watford | b1a22ac | 2009-07-08 04:02:05 +0000 | [diff] [blame^] | 349 | const char *case_start = str; |
Michael Clark | 95f55a7 | 2009-04-27 08:16:58 +0000 | [diff] [blame] | 350 | while(1) { |
| 351 | if(c == tok->quote_char) { |
| 352 | printbuf_memappend_fast(tok->pb, case_start, str-case_start); |
| 353 | current = json_object_new_string(tok->pb->buf); |
| 354 | saved_state = json_tokener_state_finish; |
| 355 | state = json_tokener_state_eatws; |
| 356 | break; |
| 357 | } else if(c == '\\') { |
| 358 | printbuf_memappend_fast(tok->pb, case_start, str-case_start); |
| 359 | saved_state = json_tokener_state_string; |
| 360 | state = json_tokener_state_string_escape; |
| 361 | break; |
| 362 | } |
| 363 | if (!ADVANCE_CHAR(str, tok) || !POP_CHAR(c, tok)) { |
| 364 | printbuf_memappend_fast(tok->pb, case_start, str-case_start); |
| 365 | goto out; |
| 366 | } |
| 367 | } |
Michael Clark | f0d0888 | 2007-03-13 08:26:18 +0000 | [diff] [blame] | 368 | } |
Michael Clark | f0d0888 | 2007-03-13 08:26:18 +0000 | [diff] [blame] | 369 | break; |
| 370 | |
| 371 | case json_tokener_state_string_escape: |
| 372 | switch(c) { |
| 373 | case '"': |
| 374 | case '\\': |
Michael Clark | a850f8e | 2007-03-13 08:26:26 +0000 | [diff] [blame] | 375 | case '/': |
Michael Clark | 95f55a7 | 2009-04-27 08:16:58 +0000 | [diff] [blame] | 376 | printbuf_memappend_fast(tok->pb, &c, 1); |
Michael Clark | f0d0888 | 2007-03-13 08:26:18 +0000 | [diff] [blame] | 377 | state = saved_state; |
| 378 | break; |
| 379 | case 'b': |
| 380 | case 'n': |
| 381 | case 'r': |
| 382 | case 't': |
Michael Clark | 95f55a7 | 2009-04-27 08:16:58 +0000 | [diff] [blame] | 383 | if(c == 'b') printbuf_memappend_fast(tok->pb, "\b", 1); |
| 384 | else if(c == 'n') printbuf_memappend_fast(tok->pb, "\n", 1); |
| 385 | else if(c == 'r') printbuf_memappend_fast(tok->pb, "\r", 1); |
| 386 | else if(c == 't') printbuf_memappend_fast(tok->pb, "\t", 1); |
Michael Clark | f0d0888 | 2007-03-13 08:26:18 +0000 | [diff] [blame] | 387 | state = saved_state; |
| 388 | break; |
| 389 | case 'u': |
Michael Clark | a850f8e | 2007-03-13 08:26:26 +0000 | [diff] [blame] | 390 | tok->ucs_char = 0; |
| 391 | tok->st_pos = 0; |
Michael Clark | f0d0888 | 2007-03-13 08:26:18 +0000 | [diff] [blame] | 392 | state = json_tokener_state_escape_unicode; |
| 393 | break; |
| 394 | default: |
Michael Clark | a850f8e | 2007-03-13 08:26:26 +0000 | [diff] [blame] | 395 | tok->err = json_tokener_error_parse_string; |
Michael Clark | f0d0888 | 2007-03-13 08:26:18 +0000 | [diff] [blame] | 396 | goto out; |
| 397 | } |
| 398 | break; |
| 399 | |
| 400 | case json_tokener_state_escape_unicode: |
Michael Clark | 95f55a7 | 2009-04-27 08:16:58 +0000 | [diff] [blame] | 401 | /* Note that the following code is inefficient for handling large |
| 402 | * chunks of extended chars, calling printbuf_memappend() once |
| 403 | * for each multi-byte character of input. |
| 404 | * This is a good area for future optimization. |
| 405 | */ |
| 406 | { |
| 407 | /* Advance until we change state */ |
| 408 | while(1) { |
| 409 | if(strchr(json_hex_chars, c)) { |
| 410 | tok->ucs_char += ((unsigned int)hexdigit(c) << ((3-tok->st_pos++)*4)); |
| 411 | if(tok->st_pos == 4) { |
| 412 | unsigned char utf_out[3]; |
| 413 | if (tok->ucs_char < 0x80) { |
| 414 | utf_out[0] = tok->ucs_char; |
| 415 | printbuf_memappend_fast(tok->pb, (char*)utf_out, 1); |
| 416 | } else if (tok->ucs_char < 0x800) { |
| 417 | utf_out[0] = 0xc0 | (tok->ucs_char >> 6); |
| 418 | utf_out[1] = 0x80 | (tok->ucs_char & 0x3f); |
| 419 | printbuf_memappend_fast(tok->pb, (char*)utf_out, 2); |
| 420 | } else { |
| 421 | utf_out[0] = 0xe0 | (tok->ucs_char >> 12); |
| 422 | utf_out[1] = 0x80 | ((tok->ucs_char >> 6) & 0x3f); |
| 423 | utf_out[2] = 0x80 | (tok->ucs_char & 0x3f); |
| 424 | printbuf_memappend_fast(tok->pb, (char*)utf_out, 3); |
| 425 | } |
| 426 | state = saved_state; |
| 427 | break; |
| 428 | } |
| 429 | } else { |
| 430 | tok->err = json_tokener_error_parse_string; |
| 431 | goto out; |
| 432 | } |
| 433 | if (!ADVANCE_CHAR(str, tok) || !POP_CHAR(c, tok)) |
| 434 | goto out; |
Michael Clark | f0d0888 | 2007-03-13 08:26:18 +0000 | [diff] [blame] | 435 | } |
Michael Clark | f0d0888 | 2007-03-13 08:26:18 +0000 | [diff] [blame] | 436 | } |
| 437 | break; |
| 438 | |
| 439 | case json_tokener_state_boolean: |
Michael Clark | 95f55a7 | 2009-04-27 08:16:58 +0000 | [diff] [blame] | 440 | printbuf_memappend_fast(tok->pb, &c, 1); |
Michael Clark | a850f8e | 2007-03-13 08:26:26 +0000 | [diff] [blame] | 441 | if(strncasecmp(json_true_str, tok->pb->buf, |
| 442 | min(tok->st_pos+1, strlen(json_true_str))) == 0) { |
| 443 | if(tok->st_pos == strlen(json_true_str)) { |
Michael Clark | f0d0888 | 2007-03-13 08:26:18 +0000 | [diff] [blame] | 444 | current = json_object_new_boolean(1); |
| 445 | saved_state = json_tokener_state_finish; |
| 446 | state = json_tokener_state_eatws; |
Michael Clark | a850f8e | 2007-03-13 08:26:26 +0000 | [diff] [blame] | 447 | goto redo_char; |
Michael Clark | f0d0888 | 2007-03-13 08:26:18 +0000 | [diff] [blame] | 448 | } |
Michael Clark | a850f8e | 2007-03-13 08:26:26 +0000 | [diff] [blame] | 449 | } else if(strncasecmp(json_false_str, tok->pb->buf, |
| 450 | min(tok->st_pos+1, strlen(json_false_str))) == 0) { |
| 451 | if(tok->st_pos == strlen(json_false_str)) { |
Michael Clark | f0d0888 | 2007-03-13 08:26:18 +0000 | [diff] [blame] | 452 | current = json_object_new_boolean(0); |
| 453 | saved_state = json_tokener_state_finish; |
| 454 | state = json_tokener_state_eatws; |
Michael Clark | a850f8e | 2007-03-13 08:26:26 +0000 | [diff] [blame] | 455 | goto redo_char; |
Michael Clark | f0d0888 | 2007-03-13 08:26:18 +0000 | [diff] [blame] | 456 | } |
| 457 | } else { |
Michael Clark | a850f8e | 2007-03-13 08:26:26 +0000 | [diff] [blame] | 458 | tok->err = json_tokener_error_parse_boolean; |
Michael Clark | f0d0888 | 2007-03-13 08:26:18 +0000 | [diff] [blame] | 459 | goto out; |
| 460 | } |
Michael Clark | a850f8e | 2007-03-13 08:26:26 +0000 | [diff] [blame] | 461 | tok->st_pos++; |
Michael Clark | f0d0888 | 2007-03-13 08:26:18 +0000 | [diff] [blame] | 462 | break; |
| 463 | |
| 464 | case json_tokener_state_number: |
Michael Clark | 95f55a7 | 2009-04-27 08:16:58 +0000 | [diff] [blame] | 465 | { |
| 466 | /* Advance until we change state */ |
Christopher Watford | b1a22ac | 2009-07-08 04:02:05 +0000 | [diff] [blame^] | 467 | const char *case_start = str; |
Michael Clark | 95f55a7 | 2009-04-27 08:16:58 +0000 | [diff] [blame] | 468 | int case_len=0; |
| 469 | while(c && strchr(json_number_chars, c)) { |
| 470 | ++case_len; |
| 471 | if(c == '.' || c == 'e') tok->is_double = 1; |
| 472 | if (!ADVANCE_CHAR(str, tok) || !POP_CHAR(c, tok)) { |
| 473 | printbuf_memappend_fast(tok->pb, case_start, case_len); |
| 474 | goto out; |
| 475 | } |
Michael Clark | f0d0888 | 2007-03-13 08:26:18 +0000 | [diff] [blame] | 476 | } |
Michael Clark | 95f55a7 | 2009-04-27 08:16:58 +0000 | [diff] [blame] | 477 | if (case_len>0) |
| 478 | printbuf_memappend_fast(tok->pb, case_start, case_len); |
| 479 | } |
| 480 | { |
| 481 | int numi; |
| 482 | double numd; |
| 483 | if(!tok->is_double && sscanf(tok->pb->buf, "%d", &numi) == 1) { |
| 484 | current = json_object_new_int(numi); |
| 485 | } else if(tok->is_double && sscanf(tok->pb->buf, "%lf", &numd) == 1) { |
| 486 | current = json_object_new_double(numd); |
| 487 | } else { |
| 488 | tok->err = json_tokener_error_parse_number; |
| 489 | goto out; |
| 490 | } |
| 491 | saved_state = json_tokener_state_finish; |
| 492 | state = json_tokener_state_eatws; |
| 493 | goto redo_char; |
Michael Clark | f0d0888 | 2007-03-13 08:26:18 +0000 | [diff] [blame] | 494 | } |
| 495 | break; |
| 496 | |
| 497 | case json_tokener_state_array: |
| 498 | if(c == ']') { |
Michael Clark | f0d0888 | 2007-03-13 08:26:18 +0000 | [diff] [blame] | 499 | saved_state = json_tokener_state_finish; |
| 500 | state = json_tokener_state_eatws; |
| 501 | } else { |
Michael Clark | a850f8e | 2007-03-13 08:26:26 +0000 | [diff] [blame] | 502 | if(tok->depth >= JSON_TOKENER_MAX_DEPTH-1) { |
| 503 | tok->err = json_tokener_error_depth; |
Michael Clark | f0d0888 | 2007-03-13 08:26:18 +0000 | [diff] [blame] | 504 | goto out; |
| 505 | } |
Michael Clark | a850f8e | 2007-03-13 08:26:26 +0000 | [diff] [blame] | 506 | state = json_tokener_state_array_add; |
| 507 | tok->depth++; |
| 508 | json_tokener_reset_level(tok, tok->depth); |
| 509 | goto redo_char; |
Michael Clark | f0d0888 | 2007-03-13 08:26:18 +0000 | [diff] [blame] | 510 | } |
| 511 | break; |
| 512 | |
Michael Clark | a850f8e | 2007-03-13 08:26:26 +0000 | [diff] [blame] | 513 | case json_tokener_state_array_add: |
| 514 | json_object_array_add(current, obj); |
| 515 | saved_state = json_tokener_state_array_sep; |
| 516 | state = json_tokener_state_eatws; |
| 517 | goto redo_char; |
| 518 | |
Michael Clark | f0d0888 | 2007-03-13 08:26:18 +0000 | [diff] [blame] | 519 | case json_tokener_state_array_sep: |
| 520 | if(c == ']') { |
Michael Clark | f0d0888 | 2007-03-13 08:26:18 +0000 | [diff] [blame] | 521 | saved_state = json_tokener_state_finish; |
| 522 | state = json_tokener_state_eatws; |
| 523 | } else if(c == ',') { |
Michael Clark | f0d0888 | 2007-03-13 08:26:18 +0000 | [diff] [blame] | 524 | saved_state = json_tokener_state_array; |
| 525 | state = json_tokener_state_eatws; |
| 526 | } else { |
Michael Clark | a850f8e | 2007-03-13 08:26:26 +0000 | [diff] [blame] | 527 | tok->err = json_tokener_error_parse_array; |
| 528 | goto out; |
Michael Clark | f0d0888 | 2007-03-13 08:26:18 +0000 | [diff] [blame] | 529 | } |
| 530 | break; |
| 531 | |
Michael Clark | f0d0888 | 2007-03-13 08:26:18 +0000 | [diff] [blame] | 532 | case json_tokener_state_object_field_start: |
| 533 | if(c == '}') { |
Michael Clark | f0d0888 | 2007-03-13 08:26:18 +0000 | [diff] [blame] | 534 | saved_state = json_tokener_state_finish; |
| 535 | state = json_tokener_state_eatws; |
| 536 | } else if (c == '"' || c == '\'') { |
Michael Clark | a850f8e | 2007-03-13 08:26:26 +0000 | [diff] [blame] | 537 | tok->quote_char = c; |
| 538 | printbuf_reset(tok->pb); |
Michael Clark | f0d0888 | 2007-03-13 08:26:18 +0000 | [diff] [blame] | 539 | state = json_tokener_state_object_field; |
Michael Clark | 0370baa | 2007-03-13 08:26:22 +0000 | [diff] [blame] | 540 | } else { |
Michael Clark | a850f8e | 2007-03-13 08:26:26 +0000 | [diff] [blame] | 541 | tok->err = json_tokener_error_parse_object_key_name; |
Michael Clark | 0370baa | 2007-03-13 08:26:22 +0000 | [diff] [blame] | 542 | goto out; |
Michael Clark | f0d0888 | 2007-03-13 08:26:18 +0000 | [diff] [blame] | 543 | } |
| 544 | break; |
| 545 | |
| 546 | case json_tokener_state_object_field: |
Michael Clark | 95f55a7 | 2009-04-27 08:16:58 +0000 | [diff] [blame] | 547 | { |
| 548 | /* Advance until we change state */ |
Christopher Watford | b1a22ac | 2009-07-08 04:02:05 +0000 | [diff] [blame^] | 549 | const char *case_start = str; |
Michael Clark | 95f55a7 | 2009-04-27 08:16:58 +0000 | [diff] [blame] | 550 | while(1) { |
| 551 | if(c == tok->quote_char) { |
| 552 | printbuf_memappend_fast(tok->pb, case_start, str-case_start); |
| 553 | obj_field_name = strdup(tok->pb->buf); |
| 554 | saved_state = json_tokener_state_object_field_end; |
| 555 | state = json_tokener_state_eatws; |
| 556 | break; |
| 557 | } else if(c == '\\') { |
| 558 | printbuf_memappend_fast(tok->pb, case_start, str-case_start); |
| 559 | saved_state = json_tokener_state_object_field; |
| 560 | state = json_tokener_state_string_escape; |
| 561 | break; |
| 562 | } |
| 563 | if (!ADVANCE_CHAR(str, tok) || !POP_CHAR(c, tok)) { |
| 564 | printbuf_memappend_fast(tok->pb, case_start, str-case_start); |
| 565 | goto out; |
| 566 | } |
| 567 | } |
Michael Clark | f0d0888 | 2007-03-13 08:26:18 +0000 | [diff] [blame] | 568 | } |
Michael Clark | f0d0888 | 2007-03-13 08:26:18 +0000 | [diff] [blame] | 569 | break; |
| 570 | |
| 571 | case json_tokener_state_object_field_end: |
| 572 | if(c == ':') { |
Michael Clark | f0d0888 | 2007-03-13 08:26:18 +0000 | [diff] [blame] | 573 | saved_state = json_tokener_state_object_value; |
| 574 | state = json_tokener_state_eatws; |
| 575 | } else { |
Michael Clark | a850f8e | 2007-03-13 08:26:26 +0000 | [diff] [blame] | 576 | tok->err = json_tokener_error_parse_object_key_sep; |
| 577 | goto out; |
Michael Clark | f0d0888 | 2007-03-13 08:26:18 +0000 | [diff] [blame] | 578 | } |
| 579 | break; |
| 580 | |
| 581 | case json_tokener_state_object_value: |
Michael Clark | a850f8e | 2007-03-13 08:26:26 +0000 | [diff] [blame] | 582 | if(tok->depth >= JSON_TOKENER_MAX_DEPTH-1) { |
| 583 | tok->err = json_tokener_error_depth; |
Michael Clark | f0d0888 | 2007-03-13 08:26:18 +0000 | [diff] [blame] | 584 | goto out; |
| 585 | } |
Michael Clark | a850f8e | 2007-03-13 08:26:26 +0000 | [diff] [blame] | 586 | state = json_tokener_state_object_value_add; |
| 587 | tok->depth++; |
| 588 | json_tokener_reset_level(tok, tok->depth); |
| 589 | goto redo_char; |
| 590 | |
| 591 | case json_tokener_state_object_value_add: |
Michael Clark | f0d0888 | 2007-03-13 08:26:18 +0000 | [diff] [blame] | 592 | json_object_object_add(current, obj_field_name, obj); |
| 593 | free(obj_field_name); |
| 594 | obj_field_name = NULL; |
| 595 | saved_state = json_tokener_state_object_sep; |
| 596 | state = json_tokener_state_eatws; |
Michael Clark | a850f8e | 2007-03-13 08:26:26 +0000 | [diff] [blame] | 597 | goto redo_char; |
Michael Clark | f0d0888 | 2007-03-13 08:26:18 +0000 | [diff] [blame] | 598 | |
| 599 | case json_tokener_state_object_sep: |
| 600 | if(c == '}') { |
Michael Clark | f0d0888 | 2007-03-13 08:26:18 +0000 | [diff] [blame] | 601 | saved_state = json_tokener_state_finish; |
| 602 | state = json_tokener_state_eatws; |
| 603 | } else if(c == ',') { |
Michael Clark | a850f8e | 2007-03-13 08:26:26 +0000 | [diff] [blame] | 604 | saved_state = json_tokener_state_object_field_start; |
Michael Clark | f0d0888 | 2007-03-13 08:26:18 +0000 | [diff] [blame] | 605 | state = json_tokener_state_eatws; |
| 606 | } else { |
Michael Clark | a850f8e | 2007-03-13 08:26:26 +0000 | [diff] [blame] | 607 | tok->err = json_tokener_error_parse_object_value_sep; |
Michael Clark | f0d0888 | 2007-03-13 08:26:18 +0000 | [diff] [blame] | 608 | goto out; |
| 609 | } |
| 610 | break; |
| 611 | |
| 612 | } |
Michael Clark | 95f55a7 | 2009-04-27 08:16:58 +0000 | [diff] [blame] | 613 | if (!ADVANCE_CHAR(str, tok)) |
| 614 | goto out; |
| 615 | } /* while(POP_CHAR) */ |
Michael Clark | f0d0888 | 2007-03-13 08:26:18 +0000 | [diff] [blame] | 616 | |
| 617 | out: |
Michael Clark | 95f55a7 | 2009-04-27 08:16:58 +0000 | [diff] [blame] | 618 | if (!c) { /* We hit an eof char (0) */ |
| 619 | if(state != json_tokener_state_finish && |
| 620 | saved_state != json_tokener_state_finish) |
| 621 | tok->err = json_tokener_error_parse_eof; |
| 622 | } |
| 623 | |
Michael Clark | a850f8e | 2007-03-13 08:26:26 +0000 | [diff] [blame] | 624 | if(tok->err == json_tokener_success) return json_object_get(current); |
Michael Clark | dfaf670 | 2007-10-25 02:26:00 +0000 | [diff] [blame] | 625 | MC_DEBUG("json_tokener_parse_ex: error %s at offset %d\n", |
Michael Clark | a850f8e | 2007-03-13 08:26:26 +0000 | [diff] [blame] | 626 | json_tokener_errors[tok->err], tok->char_offset); |
| 627 | return NULL; |
Michael Clark | f0d0888 | 2007-03-13 08:26:18 +0000 | [diff] [blame] | 628 | } |