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139 lines (121 sloc) 3.187 kb
#include <stdio.h>
#include <assert.h>
#include <ctype.h>
#include <errno.h>
#include <string.h>
#include <stdlib.h>
#include <stdarg.h>
#include "memcached.h"
/* Avoid warnings on solaris, where isspace() is an index into an array, and gcc uses signed chars */
#define xisspace(c) isspace((unsigned char)c)
bool safe_strtoull(const char *str, uint64_t *out) {
assert(out != NULL);
errno = 0;
*out = 0;
char *endptr;
unsigned long long ull = strtoull(str, &endptr, 10);
if (errno == ERANGE)
return false;
if (xisspace(*endptr) || (*endptr == '\0' && endptr != str)) {
if ((long long) ull < 0) {
/* only check for negative signs in the uncommon case when
* the unsigned number is so big that it's negative as a
* signed number. */
if (strchr(str, '-') != NULL) {
return false;
}
}
*out = ull;
return true;
}
return false;
}
bool safe_strtoll(const char *str, int64_t *out) {
assert(out != NULL);
errno = 0;
*out = 0;
char *endptr;
long long ll = strtoll(str, &endptr, 10);
if (errno == ERANGE)
return false;
if (xisspace(*endptr) || (*endptr == '\0' && endptr != str)) {
*out = ll;
return true;
}
return false;
}
bool safe_strtoul(const char *str, uint32_t *out) {
char *endptr = NULL;
unsigned long l = 0;
assert(out);
assert(str);
*out = 0;
errno = 0;
l = strtoul(str, &endptr, 10);
if (errno == ERANGE) {
return false;
}
if (xisspace(*endptr) || (*endptr == '\0' && endptr != str)) {
if ((long) l < 0) {
/* only check for negative signs in the uncommon case when
* the unsigned number is so big that it's negative as a
* signed number. */
if (strchr(str, '-') != NULL) {
return false;
}
}
*out = l;
return true;
}
return false;
}
bool safe_strtol(const char *str, int32_t *out) {
assert(out != NULL);
errno = 0;
*out = 0;
char *endptr;
long l = strtol(str, &endptr, 10);
if (errno == ERANGE)
return false;
if (xisspace(*endptr) || (*endptr == '\0' && endptr != str)) {
*out = l;
return true;
}
return false;
}
void vperror(const char *fmt, ...) {
int old_errno = errno;
char buf[1024];
va_list ap;
va_start(ap, fmt);
if (vsnprintf(buf, sizeof(buf), fmt, ap) == -1) {
buf[sizeof(buf) - 1] = '\0';
}
va_end(ap);
errno = old_errno;
perror(buf);
}
#ifndef HAVE_HTONLL
static uint64_t mc_swap64(uint64_t in) {
#ifdef ENDIAN_LITTLE
/* Little endian, flip the bytes around until someone makes a faster/better
* way to do this. */
int64_t rv = 0;
int i = 0;
for(i = 0; i<8; i++) {
rv = (rv << 8) | (in & 0xff);
in >>= 8;
}
return rv;
#else
/* big-endian machines don't need byte swapping */
return in;
#endif
}
uint64_t ntohll(uint64_t val) {
return mc_swap64(val);
}
uint64_t htonll(uint64_t val) {
return mc_swap64(val);
}
#endif
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