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#include <stdlib.h>
#include "jsmn.h"
enum {
JSON_SKIP = 0,
JSON_OPEN = 1,
JSON_CLOSE = 2,
JSON_BARE = 3,
JSON_UNBARE = 4,
JSON_QUOTE = 5,
JSON_UNQUOTE = 6,
JSON_ERROR = 7
};
#define JSON_SYM_SKIP(sym) \
[sym] = JSON_SKIP
#define JSON_SYM_ERROR(sym) \
[sym] = JSON_ERROR
#define JSON_SYM_OPEN(sym) \
[sym] = JSON_OPEN
#define JSON_SYM_CLOSE(sym) \
[sym] = JSON_CLOSE
#define JSON_SYM_BARE(sym) \
[sym] = JSON_BARE
#define JSON_SYM_UNBARE(sym) \
[sym] = JSON_UNBARE
#define JSON_SYM_QUOTE(sym) \
[sym] = JSON_QUOTE
#define JSON_SYM_UNQUOTE(sym) \
[sym] = JSON_UNQUOTE
int jsmn_parse(const unsigned char *js, jsontok_t *tokens, size_t num_tokens, int **errpos) {
int jsmn_token_start(jsontype_t type, int pos) {
unsigned int i;
for (i = 0; i<num_tokens; i++) {
if (tokens[i].start == -1 && tokens[i].end == -1) {
tokens[i].start = pos;
tokens[i].type = type;
return 0;
}
}
return -1;
}
int jsmn_token_end(jsontype_t type, int pos) {
int i;
for (i = num_tokens - 1; i>= 0; i--) {
if (tokens[i].type == type && tokens[i].start != -1 && tokens[i].end == -1) {
tokens[i].end = pos;
return 0;
}
}
return -1;
}
const unsigned char *p;
int obj_common[] = {
JSON_SYM_ERROR(0 ... 255),
JSON_SYM_SKIP('\t'), JSON_SYM_SKIP('\r'),JSON_SYM_SKIP('\n'),
JSON_SYM_SKIP(':'), JSON_SYM_SKIP(','), JSON_SYM_SKIP(' '),
JSON_SYM_QUOTE('\"'),
JSON_SYM_OPEN('['), JSON_SYM_CLOSE(']'),
JSON_SYM_OPEN('{'), JSON_SYM_CLOSE('}'),
JSON_SYM_BARE('-'), JSON_SYM_BARE('0'...'9'),
JSON_SYM_BARE('t'), JSON_SYM_BARE('f'), JSON_SYM_BARE('n') /* true false null */
};
int obj_bare[] = {
JSON_SYM_ERROR(0 ... 31),
JSON_SYM_ERROR(127 ... 255),
JSON_SYM_SKIP(32 ... 126),
JSON_SYM_UNBARE('\t'), JSON_SYM_UNBARE(' '),
JSON_SYM_UNBARE('\r'), JSON_SYM_UNBARE('\n'),
JSON_SYM_UNBARE(','), JSON_SYM_UNBARE(']'),
JSON_SYM_UNBARE('}')
};
int obj_string[] = {
JSON_SYM_ERROR(0 ... 31), JSON_SYM_ERROR(127),
JSON_SYM_SKIP(32 ... 126),
JSON_SYM_UNQUOTE('\"'),
JSON_SYM_ERROR(248 ... 255),
};
int *obj_state = obj_common;
unsigned int i;
for (i = 0; i<num_tokens; i++) {
tokens[i].start = tokens[i].end = -1;
tokens[i].type = JSON_OTHER;
}
for (p = js; *p != '\0'; ) {
switch (obj_state[*p]) {
case JSON_ERROR:
if (errpos != NULL) {
*errpos = p - js;
}
return -1;
case JSON_OPEN:
jsmn_token_start(JSON_OBJECT, p - js);
break;
case JSON_CLOSE:
jsmn_token_end(JSON_OBJECT, p - js + 1);
break;
case JSON_BARE:
jsmn_token_start(JSON_OTHER, p - js);
obj_state = obj_bare;
break;
case JSON_UNBARE:
jsmn_token_end(JSON_OTHER, p - js);
obj_state = obj_common;
continue;
case JSON_QUOTE:
jsmn_token_start(JSON_STRING, p - js + 1);
obj_state = obj_string;
break;
case JSON_UNQUOTE:
jsmn_token_end(JSON_STRING, p - js);
obj_state = obj_common;
break;
case JSON_SKIP:
break;
}
p++;
}
return 0;
}
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