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/* This software was written by Dirk Engling <erdgeist@erdgeist.org>
It is considered beerware. Prost. Skol. Cheers or whatever.
$id$ */
/* System */
#include <errno.h>
#include <stdint.h>
#include <stdlib.h>
/* Opentracker */
#include "ot_scan.h"
size_t scan_udec(const char *src, uint64_t *dest, uint64_t max) {
unsigned long long value;
char *end;
if (*src < '0' || *src > '9')
return 0;
errno = 0;
value = strtoull(src, &end, 10);
if (errno == ERANGE || value > (unsigned long long)max)
return 0;
*dest = (uint64_t)value;
return (size_t)(end - src);
}
size_t scan_udec_bencode(const char *src, uint64_t *dest, uint64_t max) {
uint64_t value;
size_t consumed = scan_udec(src, &value, max);
/* bencode writes no leading zeros, so anything longer than a single digit
must not begin with one. */
if (consumed > 1 && *src == '0')
return 0;
if (consumed)
*dest = value;
return consumed;
}
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