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Token manipulation functions changes. size_t replaced with unsigned int.

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master
Serge A. Zaitsev 14 years ago
parent 3922360800
commit 7a027a4dd2
3 changed files with 74 additions and 63 deletions
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31
demo.c
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@ -95,36 +95,39 @@ int main(int argc, char *argv[]) {
exit(EXIT_FAILURE);
}
jsmn_parser parser;
jsmn_init_parser(&parser, js, tokens, num_tokens);
while (1) {
char buf[BUFSIZ];
r = fread(buf, 1, BUFSIZ, f);
r = fread(buf, 1, 1, f);
if (r <= 0) {
break;
}
js = (char *) realloc(js, filesize + r);
js = (char *) realloc(js, filesize + r + 1);
if (js == NULL) {
fprintf(stderr, "Cannot allocate anough memory\n");
fclose(f);
exit(EXIT_FAILURE);
}
parser.js = js;
memcpy(js + filesize, buf, r);
filesize += r;
}
fclose(f);
js[filesize] = '\0';
jsmn_parser parser;
jsmn_init_parser(&parser, js, tokens, num_tokens);
r = jsmn_parse(&parser);
if (r < 0) {
printf("error %d at pos %d: %s\n", r, parser.pos, &js[parser.pos]);
}
r = jsmn_parse(&parser);
if (r < 0) {
printf("error %d at pos %d: %s\n", r, parser.pos, &js[parser.pos]);
}
for (i = 0; i<num_tokens; i++) {
jsmn_dump_obj(&parser.tokens[i], js);
for (i = 0; i<num_tokens; i++) {
jsmn_dump_obj(&parser.tokens[i], js);
}
}
fclose(f);
free(tokens);
free(js);
return 0;

98
jsmn.c
Unescape View File

@ -2,67 +2,63 @@
#include "jsmn.h"
void jsmn_init_parser(jsmn_parser *parser, const char *js,
jsontok_t *tokens, size_t num_tokens) {
unsigned int i;
parser->js = js;
parser->pos = 0;
parser->tokens = tokens;
parser->num_tokens = num_tokens;
for (i = 0; i < parser->num_tokens; i++) {
parser->tokens[i].start = -1;
parser->tokens[i].end = -1;
parser->tokens[i].type = JSON_PRIMITIVE;
}
}
jsontok_t *jsmn_start_token(jsmn_parser *parser, jsontype_t type) {
static jsontok_t *jsmn_get_token(jsmn_parser *parser) {
unsigned int i;
jsontok_t *tokens = parser->tokens;
for (i = 0; i<parser->num_tokens; i++) {
for (i = parser->curtoken; i<parser->num_tokens; i++) {
if (tokens[i].start == -1 && tokens[i].end == -1) {
tokens[i].start = parser->pos;
tokens[i].type = type;
parser->curtoken = i;
return &tokens[i];
}
}
return NULL;
}
jsontok_t *jsmn_end_token(jsmn_parser *parser, jsontype_t type) {
int i;
jsontok_t *tokens = parser->tokens;
for (i = parser->num_tokens - 1; i>= 0; i--) {
if (tokens[i].type == type && tokens[i].start != -1 && tokens[i].end == -1) {
tokens[i].end = parser->pos;
return &tokens[i];
}
static void jsmn_fill_token(jsontok_t *token, jsontype_t type, int start, int end) {
token->type = type;
token->start = start;
token->end = end;
}
void jsmn_init_parser(jsmn_parser *parser, const char *js,
jsontok_t *tokens, unsigned int num_tokens) {
unsigned int i;
parser->js = js;
parser->pos = 0;
parser->tokens = tokens;
parser->num_tokens = num_tokens;
parser->curtoken = 0;
for (i = 0; i < parser->num_tokens; i++) {
jsmn_fill_token(&parser->tokens[i], JSON_PRIMITIVE, -1, -1);
}
return NULL;
}
static int jsmn_parse_primitive(jsmn_parser *parser) {
const char *js;
jsontok_t *token;
int start;
js = parser->js;
start = parser->pos;
token = jsmn_start_token(parser, JSON_PRIMITIVE);
js = parser->js;
for (; js[parser->pos] != '\0'; parser->pos++) {
switch (js[parser->pos]) {
case '\t' : case '\r' : case '\n' : case ' ' :
case ',' : case ']' : case '}' :
token->end = parser->pos;
token = jsmn_get_token(parser);
jsmn_fill_token(token, JSON_PRIMITIVE, start, parser->pos);
parser->pos--;
return JSMN_SUCCESS;
}
if (js[parser->pos] < 32 || js[parser->pos] >= 127) {
parser->pos = start;
return JSMN_ERROR_INVAL;
}
}
parser->pos = start;
return JSMN_ERROR_PART;
}
@ -70,23 +66,20 @@ static int jsmn_parse_string(jsmn_parser *parser) {
const char *js;
jsontok_t *token;
js = parser->js;
int start = parser->pos;
/* Check if string begins from a quote */
if (js[parser->pos] != '\"') {
return JSMN_ERROR_INVAL;
}
js = parser->js;
parser->pos++;
token = jsmn_start_token(parser, JSON_STRING);
/* Skip starting quote */
for (; js[parser->pos] != '\0'; parser->pos++) {
char c = js[parser->pos];
/* Quote: end of string */
if (c == '\"') {
token->end = parser->pos;
token = jsmn_get_token(parser);
jsmn_fill_token(token, JSON_PRIMITIVE, start, parser->pos);
return JSMN_SUCCESS;
}
@ -104,14 +97,18 @@ static int jsmn_parse_string(jsmn_parser *parser) {
break;
/* Unexpected symbol */
default:
parser->pos = start;
return JSMN_ERROR_INVAL;
}
}
}
parser->pos = start;
return JSMN_ERROR_PART;
}
jsmnerr_t jsmn_parse(jsmn_parser *parser) {
int r;
unsigned int i;
const char *js;
jsontype_t type;
jsontok_t *token;
@ -123,21 +120,32 @@ jsmnerr_t jsmn_parse(jsmn_parser *parser) {
c = js[parser->pos];
switch (c) {
case '{': case '[':
type = (c == '{' ? JSON_OBJECT : JSON_ARRAY);
token = jsmn_start_token(parser, type);
token = jsmn_get_token(parser);
token->type = (c == '{' ? JSON_OBJECT : JSON_ARRAY);
token->start = parser->pos;
break;
case '}': case ']':
type = (c == '}' ? JSON_OBJECT : JSON_ARRAY);
token = jsmn_end_token(parser, type);
token->end++;
for (i = parser->curtoken; i >= 0; i--) {
token = &parser->tokens[i];
if (token->start != -1 && token->end == -1) {
if (token->type != type) {
return JSMN_ERROR_INVAL;
}
token->end = parser->pos + 1;
break;
}
}
break;
case '-': case '0': case '1' : case '2': case '3' : case '4':
case '5': case '6': case '7' : case '8': case '9':
case 't': case 'f': case 'n' :
jsmn_parse_primitive(parser);
r = jsmn_parse_primitive(parser);
if (r < 0) return r;
break;
case '\"':
jsmn_parse_string(parser);
r = jsmn_parse_string(parser);
if (r < 0) return r;
break;
case '\t' : case '\r' : case '\n' : case ':' : case ',': case ' ':
break;

8
jsmn.h
Unescape View File

@ -6,8 +6,7 @@
* o Object
* o Array
* o String
* o Number
* o Other primitive: boolean (true/false) or null
* o Other primitive: number, boolean (true/false) or null
*/
typedef enum {
JSON_PRIMITIVE = 0,
@ -42,7 +41,8 @@ typedef struct {
typedef struct {
const char *js;
unsigned int pos;
size_t num_tokens;
unsigned int num_tokens;
int curtoken;
jsontok_t *tokens;
} jsmn_parser;
@ -50,7 +50,7 @@ typedef struct {
* Create JSON parser over an array of tokens
*/
void jsmn_init_parser(jsmn_parser *parser, const char *js,
jsontok_t *tokens, size_t num_tokens);
jsontok_t *tokens, unsigned int num_tokens);
/**
* Run JSON parser. It parses a JSON data string into and array of tokens, each describing

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