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#include "Unescape.h"
#include "Utility.h"
#include <stdlib.h>
#include <string.h>
char *unescape_search_url(const char *input) {
if (!input) return NULL;
const char *key = NULL;
const char *start = NULL;
const char *end = NULL;
size_t len = 0;
if (strstr(input, "uddg=")) {
key = "uddg=";
start = strstr(input, key);
if (!start) return NULL;
start += strlen(key);
end = strchr(start, '&');
len = end ? (size_t)(end - start) : strlen(start);
}
else if (strstr(input, "RU=")) {
key = "RU=";
start = strstr(input, key);
if (!start) return strdup(input);
start += strlen(key);
end = strchr(start, '/');
len = end ? (size_t)(end - start) : strlen(start);
}
else {
return strdup(input);
}
char *output = (char *)malloc(len * 3 + 1);
if (!output) return NULL;
size_t i = 0, j = 0;
while (i < len) {
if (start[i] == '%' && i + 2 < len) {
int high = hex_to_int(start[i + 1]);
int low = hex_to_int(start[i + 2]);
if (high != -1 && low != -1) {
output[j++] = (char)((high << 4) | low);
i += 3;
} else {
output[j++] = start[i++];
}
} else if (start[i] == '+') {
output[j++] = ' ';
i++;
} else {
output[j++] = start[i++];
}
}
output[j] = '\0';
return output;
}
char *url_decode_query(const char *src) {
if (!src) return NULL;
char *res = strdup(src);
char *p = res;
while (*src) {
if (*src == '+') {
*p++ = ' ';
} else if (*src == '%' && src[1] && src[2]) {
char hex[3] = {src[1], src[2], '\0'};
*p++ = (char)strtol(hex, NULL, 16);
src += 2;
} else {
*p++ = *src;
}
src++;
}
*p = '\0';
return res;
}
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