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/*
* Decode %-encoding in URL style.
*/
#include <ctype.h>
#include "misc.h"
void percent_decode_bs(BinarySink *bs, ptrlen data)
{
for (const char *p = data.ptr, *e = ptrlen_end(data); p < e; p++) {
char c = *p;
if (c == '%' && e-p >= 3 &&
isxdigit((unsigned char)p[1]) &&
isxdigit((unsigned char)p[2])) {
char hex[3];
hex[0] = p[1];
hex[1] = p[2];
hex[2] = '\0';
put_byte(bs, strtoul(hex, NULL, 16));
p += 2;
} else {
put_byte(bs, c);
}
}
}
void percent_decode_fp(FILE *fp, ptrlen data)
{
stdio_sink ss;
stdio_sink_init(&ss, fp);
percent_decode_bs(BinarySink_UPCAST(&ss), data);
}
strbuf *percent_decode_sb(ptrlen data)
{
strbuf *sb = strbuf_new();
percent_decode_bs(BinarySink_UPCAST(sb), data);
return sb;
}
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