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#include "JsonHelper.h"
#include <math.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
static int is_whitespace_json(char c) {
return c == ' ' || c == '\t' || c == '\n' || c == '\r';
}
int json_parse_float_map(const char *json, const char *target_key,
JsonFloatMap *result) {
memset(result, 0, sizeof(JsonFloatMap));
if (!json || !target_key)
return 0;
const char *obj_start = strchr(json, '{');
if (!obj_start)
return 0;
const char *rates_start = strstr(obj_start, target_key);
if (!rates_start)
return 0;
rates_start = strchr(rates_start, '{');
if (!rates_start)
return 0;
const char *p = rates_start + 1;
while (*p && *p != '}') {
while (*p && (*p == ' ' || *p == '\n' || *p == '\t' || *p == ','))
p++;
if (*p == '}')
break;
if (*p != '"')
break;
p++;
char key[32] = {0};
size_t key_len = 0;
while (*p && *p != '"' && key_len < 31) {
key[key_len++] = *p++;
}
if (*p != '"')
break;
p++;
while (*p && *p != ':')
p++;
if (*p != ':')
break;
p++;
while (*p && is_whitespace_json(*p))
p++;
double value = 0;
int has_digit = 0;
while (*p >= '0' && *p <= '9') {
value = value * 10 + (*p - '0');
has_digit = 1;
p++;
}
if (*p == '.') {
p++;
double frac = 0.1;
while (*p >= '0' && *p <= '9') {
value += (*p - '0') * frac;
frac *= 0.1;
has_digit = 1;
p++;
}
}
if (has_digit && key_len > 0) {
memcpy(result->keys[result->count], key, key_len);
result->keys[result->count][key_len] = '\0';
result->values[result->count] = value;
result->count++;
if (result->count >= 256)
break;
}
}
return result->count > 0;
}
double json_get_float(const char *json, const char *key) {
if (!json || !key)
return 0;
const char *key_pos = strstr(json, key);
if (!key_pos)
return 0;
const char *colon = strchr(key_pos, ':');
if (!colon)
return 0;
colon++;
while (*colon && is_whitespace_json(*colon))
colon++;
return strtod(colon, NULL);
}
char *json_get_string(const char *json, const char *key) {
if (!json || !key)
return NULL;
static char buffer[256];
const char *key_pos = strstr(json, key);
if (!key_pos)
return NULL;
const char *colon = strchr(key_pos, ':');
if (!colon)
return NULL;
colon++;
while (*colon && is_whitespace_json(*colon))
colon++;
if (*colon != '"')
return NULL;
colon++;
size_t len = 0;
while (*colon && *colon != '"' && len < 255) {
buffer[len++] = *colon++;
}
buffer[len] = '\0';
return buffer;
}
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