52 lines
936 B
C
52 lines
936 B
C
#include <stdlib.h>
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#include <string.h>
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#include <ctype.h>
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char *libp2p_utils_url_encode(char *src)
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{
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const char *hex = "0123456789abcdef";
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char *p, *dst = malloc (strlen(src) * 3);
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if (!dst) return NULL;
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for(p = dst ; *src ; src++ ) {
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if( isalnum(*src)){
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*p++ = *src;
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} else {
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*p++ = '%';
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*p++ = hex[*src >> 4];
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*p++ = hex[*src & 15];
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}
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}
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*p++ = '\0';
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return realloc(dst, (size_t) (p - dst));
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}
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int h2b(int c)
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{
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if (c >= '0' && c <= '9') {
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return c - '0';
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} else if (c >= 'a' && c <= 'f') {
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return c - 'a' + 10;
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} else if (c >= 'A' && c <= 'F') {
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return c - 'A' + 10;
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}
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return 0; // ?
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}
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char *libp2p_utils_url_decode(char *src)
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{
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char *p, *dst = malloc (strlen(src) + 1);
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for(p = dst ; *src ; src++ ) {
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if(*src != '%'){
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*p++ = *src;
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} else {
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*p = h2b(*(++src)) << 4;
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*p++ |= h2b(*(++src)) & 15;
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}
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}
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*p++ = '\0';
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return realloc(dst, (size_t) (p - dst));
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}
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