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#include <stddef.h>
#include <ctype.h>
#include "xstring.h"
#include "url.h"
static int url_decode_hex_char(const char *query)
{
int out = 0, ch, i;
for(i = 0; i < 2; i++) {
ch = *query;
out <<= 4;
if(isdigit(ch))
out += ch - '0';
else if(isalpha(ch))
out += tolower(ch) - 'a' + 10;
else
return -1;
query++;
}
return out;
}
static string *url_decode(const char **query, char delimiter)
{
int ch;
const char *str = *query;
string *dest = string_alloc(NULL, NULL);
while((ch = *str)) {
str++;
if(ch == delimiter)
break;
if(ch == '%') {
ch = url_decode_hex_char(str);
if(ch) {
string_addch(dest, ch);
str += 2;
}
continue;
}
if(ch == '+')
string_addch(dest, ' ');
else
string_addch(dest, ch);
}
*query = str;
return dest;
}
string *url_get_param_name(const char **query)
{
return url_decode(query, '=');
}
string *url_get_param_value(const char **query)
{
return url_decode(query, '&');
}
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