static int lept_parse_number(lept_context* c, lept_value* v) {
const char* p = c->json;
if (*p == '-') p++;
if (*p == '0') p++;
else {
if (!ISDIGIT1TO9(*p)) return LEPT_PARSE_INVALID_VALUE;
for (p++; ISDIGIT(*p); p++);
}
if (*p == '.') {
p++;
if (!ISDIGIT(*p)) return LEPT_PARSE_INVALID_VALUE;
for (p++; ISDIGIT(*p); p++);
}
if (*p == 'e' || *p == 'E') {
p++;
if (*p == '+' || *p == '-') p++;
if (!ISDIGIT(*p)) return LEPT_PARSE_INVALID_VALUE;
for (p++; ISDIGIT(*p); p++);
}
errno = 0;
v->u.n = strtod(c->json, NULL);
if (errno == ERANGE && (v->u.n == HUGE_VAL || v->u.n == -HUGE_VAL))
return LEPT_PARSE_NUMBER_TOO_BIG;
v->type = LEPT_NUMBER;
c->json = p;
return LEPT_PARSE_OK;
}
/*
*parse number
*这里的双精度double 由几部分组成 负号,整数,小数,指数. 除了整数都不是必须的,
*/
static int rajson_parse_number(rajson_context* c, rajson_value* v)
{
int ret;
const char* tmpjson = c->json;
if (*tmpjson == '-') tmpjson++;
//整数部分
if (*tmpjson == '0') tmpjson++;
else{
if (!ISDIGIT1TO9(*tmpjson)) return RAJSON_PARSE_INVALID_VALUE;
for (tmpjson++; ISDIGIT(*tmpjson); tmpjson++);
}
//小数点后
if (*tmpjson == '.')
{
tmpjson++;
if (!ISDIGIT(*tmpjson)) return RAJSON_PARSE_INVALID_VALUE;
for (tmpjson++; ISDIGIT(*tmpjson); tmpjson++);
}
if (*tmpjson == 'e' || *tmpjson == 'E')
{
tmpjson++;
if (*tmpjson == '+' || *tmpjson == '-')
tmpjson++;
if (!ISDIGIT(*tmpjson)) return RAJSON_PARSE_INVALID_VALUE;
for (tmpjson++; ISDIGIT(*tmpjson); tmpjson++);
}
errno = 0;
v->n = strtod(c->json, NULL);
if (errno == ERANGE && (v->n == HUGE_VAL || v->n == -HUGE_VAL))
return RAJSON_PARSE_NUMBER_TOO_BIG;
v->type = RAJSON_NUMBER;
c->json = tmpjson;
return RAJSON_PARSE_OK;
}
