/* Converts a hex character to its integer value */
char from_hex(char ch) {
- return (char)(isdigit(ch) ? ch - '0' : tolower(ch) - 'a' + 10);
+ return (char)(isdigit(ch) ? ch - '0' : tolower(ch) - 'a' + 10);
}
/* Converts an integer value to its hex character*/
char to_hex(char code) {
- static char hex[] = "0123456789abcdef";
- return hex[code & 15];
+ static char hex[] = "0123456789abcdef";
+ return hex[code & 15];
}
/* Returns a url-encoded version of str */
/* IMPORTANT: be sure to free() the returned string after use */
char *url_encode(char *str) {
- char *buf, *pbuf;
+ char *buf, *pbuf;
- pbuf = buf = mallocz(strlen(str) * 3 + 1);
+ pbuf = buf = mallocz(strlen(str) * 3 + 1);
- while (*str) {
- if (isalnum(*str) || *str == '-' || *str == '_' || *str == '.' || *str == '~')
- *pbuf++ = *str;
+ while (*str) {
+ if (isalnum(*str) || *str == '-' || *str == '_' || *str == '.' || *str == '~')
+ *pbuf++ = *str;
- else if (*str == ' ')
- *pbuf++ = '+';
+ else if (*str == ' ')
+ *pbuf++ = '+';
- else
- *pbuf++ = '%', *pbuf++ = to_hex(*str >> 4), *pbuf++ = to_hex(*str & 15);
+ else
+ *pbuf++ = '%', *pbuf++ = to_hex(*str >> 4), *pbuf++ = to_hex(*str & 15);
- str++;
- }
- *pbuf = '\0';
+ str++;
+ }
+ *pbuf = '\0';
- pbuf = strdupz(buf);
- freez(buf);
- return pbuf;
+ pbuf = strdupz(buf);
+ freez(buf);
+ return pbuf;
}
/* Returns a url-decoded version of str */
/* IMPORTANT: be sure to free() the returned string after use */
char *url_decode(char *str) {
- size_t size = strlen(str) + 1;
+ size_t size = strlen(str) + 1;
- char *buf = mallocz(size);
- return url_decode_r(buf, str, size);
+ char *buf = mallocz(size);
+ return url_decode_r(buf, str, size);
}
char *url_decode_r(char *to, char *url, size_t size) {
- char *s = url, // source
- *d = to, // destination
- *e = &to[size - 1]; // destination end
+ char *s = url, // source
+ *d = to, // destination
+ *e = &to[size - 1]; // destination end
- while(*s && d < e) {
- if(unlikely(*s == '%')) {
- if(likely(s[1] && s[2])) {
- *d++ = from_hex(s[1]) << 4 | from_hex(s[2]);
- s += 2;
- }
- }
- else if(unlikely(*s == '+'))
- *d++ = ' ';
+ while(*s && d < e) {
+ if(unlikely(*s == '%')) {
+ if(likely(s[1] && s[2])) {
+ *d++ = from_hex(s[1]) << 4 | from_hex(s[2]);
+ s += 2;
+ }
+ }
+ else if(unlikely(*s == '+'))
+ *d++ = ' ';
- else
- *d++ = *s;
+ else
+ *d++ = *s;
- s++;
- }
+ s++;
+ }
- *d = '\0';
+ *d = '\0';
- return to;
+ return to;
}