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Fall back to sscanf if we have no other way to implement strtoll

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This commit is contained in:
Nick Mathewson 2011-01-24 18:22:32 -05:00
parent 3267703658
commit 453317b28c
1 changed files with 32 additions and 0 deletions
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32
evutil.c
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@ -351,6 +351,8 @@ evutil_strtoll(const char *s, char **endptr, int base)
r = (ev_int64_t) _atoi64(s);
while (isspace(*s))
++s;
if (*s == '-')
++s;
while (isdigit(*s))
++s;
if (endptr)
@ -358,6 +360,36 @@ evutil_strtoll(const char *s, char **endptr, int base)
return r;
#elif defined(WIN32)
return (ev_int64_t) _strtoi64(s, endptr, base);
#elif defined(_EVENT_SIZEOF_LONG_LONG) && _EVENT_SIZEOF_LONG_LONG == 8
long long r;
int n;
if (base != 10 && base != 16)
return 0;
if (base == 10) {
n = sscanf(s, "%lld", &r);
} else {
unsigned long long ru=0;
n = sscanf(s, "%llx", &ru);
if (ru > EV_INT64_MAX)
return 0;
r = (long long) ru;
}
if (n != 1)
return 0;
while (EVUTIL_ISSPACE(*s))
++s;
if (*s == '-')
++s;
if (base == 10) {
while (EVUTIL_ISDIGIT(*s))
++s;
} else {
while (EVUTIL_ISXDIGIT(*s))
++s;
}
if (endptr)
*endptr = (char*) s;
return r;
#else
#error "I don't know how to parse 64-bit integers."
#endif