static int compareStringsASCII(const char** in1, const char** in2)
{
const char* str1 = *in1, *str2 = *in2;
int s;
while(true) {
char c1 = *++str1;
char c2 = *++str2;
/* If one string ends, the other is greater; if both end,
they're equal */
if (c1 == '"') {
if (c2 == '"')
break;
else
return -1;
} else if (c2 == '"')
return 1;
/* Handle escape sequences: */
if (c1 == '\\')
c1 = ConvertJSONEscape(&str1);
if (c2 == '\\')
c2 = ConvertJSONEscape(&str2);
/* Compare the next characters: */
s = cmp(c1, c2);
if (s)
return s;
}
/* Strings are equal, so update the positions: */
*in1 = str1 + 1;
*in2 = str2 + 1;
return 0;
}
static const char* createStringFromJSON(const char** in, size_t *length, bool *freeWhenDone)
{
char* buf;
char* dst;
char c;
/* Scan the JSON string to find its length and whether it contains
escapes: */
const char* start = ++*in;
unsigned escapes = 0;
const char* str;
for (str = start; *str != '"'; ++str) {
if (*str == '\\') {
++str;
if (*str == 'u') {
escapes += 5; /* \uxxxx adds 5 bytes */
str += 4;
} else
escapes += 1;
}
}
*in = str + 1;
*length = str - start;
*freeWhenDone = false;
if (escapes > 0) {
*length -= escapes;
buf = malloc(*length);
dst = buf;
for (str = start; (c = *str) != '"'; ++str) {
if (c == '\\')
c = ConvertJSONEscape(&str);
*dst++ = c;
}
cb_assert(dst - buf == (int)*length);
start = buf;
*freeWhenDone = true;
}
return start;
}
static void testEscape(const char* source, char decoded) {
const char* pos = source;
assert_eq(ConvertJSONEscape(&pos), decoded);
assert_eq((size_t)pos, (size_t)(source + strlen(source) - 1));
}