configure: add gettid() test
[fio.git] / lib / strntol.c
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1#include <string.h>
2#include <stdlib.h>
3#include <limits.h>
4
2c48ab2e 5#include "strntol.h"
a89ba4b1 6
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7long strntol(const char *str, size_t sz, char **end, int base)
8{
9 /* Expect that digit representation of LONG_MAX/MIN
10 * not greater than this buffer */
11 char buf[24];
12 long ret;
13 const char *beg = str;
14
15 /* Catch up leading spaces */
16 for (; beg && sz && *beg == ' '; beg++, sz--)
17 ;
18
19 if (!sz || sz >= sizeof(buf)) {
20 if (end)
21 *end = (char *)str;
22 return 0;
23 }
24
25 memcpy(buf, beg, sz);
26 buf[sz] = '\0';
27 ret = strtol(buf, end, base);
28 if (ret == LONG_MIN || ret == LONG_MAX)
29 return ret;
30 if (end)
a9d95828 31 *end = (char *)beg + (*end - buf);
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32 return ret;
33}