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/*
* Copyright © 2016 Samsung Electronics Co., Ltd
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice (including the
* next paragraph) shall be included in all copies or substantial
* portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#ifndef WESTON_STRING_HELPERS_H
#define WESTON_STRING_HELPERS_H
#include <stdbool.h>
#include <stdarg.h>
#include <stdlib.h>
#include <stdint.h>
#include <errno.h>
#include <assert.h>
/* Convert string to integer
*
* Parses a base-10 number from the given string. Checks that the
* string is not blank, contains only numerical characters, and is
* within the range of INT32_MIN to INT32_MAX. If the validation is
* successful the result is stored in *value; otherwise *value is
* unchanged and errno is set appropriately.
*
* \return true if the number parsed successfully, false on error
*/
static inline bool
safe_strtoint(const char *str, int32_t *value)
{
long ret;
char *end;
assert(str != NULL);
errno = 0;
ret = strtol(str, &end, 10);
if (errno != 0) {
return false;
} else if (end == str || *end != '\0') {
errno = EINVAL;
return false;
}
if ((long)((int32_t)ret) != ret) {
errno = ERANGE;
return false;
}
*value = (int32_t)ret;
return true;
}
/**
* Exactly like asprintf(), but sets *str_out to NULL if it fails.
*
* If str_out is NULL, does nothing.
*/
static inline void __attribute__ ((format (printf, 2, 3)))
str_printf(char **str_out, const char *fmt, ...)
{
char *msg;
va_list ap;
int ret;
if (!str_out)
return;
va_start(ap, fmt);
ret = vasprintf(&msg, fmt, ap);
va_end(ap);
if (ret >= 0)
*str_out = msg;
else
*str_out = NULL;
}
#endif /* WESTON_STRING_HELPERS_H */
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