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/*
* libiio - Library for interfacing industrial I/O (IIO) devices
*
* Copyright (C) 2014 Analog Devices, Inc.
* Author: Paul Cercueil <paul.cercueil@analog.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* */
/* Force the XSI version of strerror_r */
#undef _GNU_SOURCE
#include "iio-config.h"
#include "iio-private.h"
#include <errno.h>
#include <locale.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#if defined(_WIN32) || (defined(__USE_XOPEN2K8) && \
(!defined(__UCLIBC__) || defined(__UCLIBC_HAS_LOCALE__)))
#define LOCALE_SUPPORT
#endif
#ifdef LOCALE_SUPPORT
#if defined(__MINGW32__) || (!defined(_WIN32) && !defined(HAS_NEWLOCALE))
static int read_double_locale(const char *str, double *val)
{
char *end, *old_locale;
double value;
/* XXX: This is not thread-safe, but it's the only way we have to
* support locales under MinGW without linking with Visual Studio
* libraries. */
old_locale = iio_strdup(setlocale(LC_NUMERIC, NULL));
if (!old_locale)
return -ENOMEM;
setlocale(LC_NUMERIC, "C");
value = strtod(str, &end);
setlocale(LC_NUMERIC, old_locale);
free(old_locale);
if (end == str)
return -EINVAL;
*val = value;
return 0;
}
static int write_double_locale(char *buf, size_t len, double val)
{
/* XXX: Not thread-safe, see above */
char *old_locale = iio_strdup(setlocale(LC_NUMERIC, NULL));
if (!old_locale)
return -ENOMEM;
setlocale(LC_NUMERIC, "C");
iio_snprintf(buf, len, "%f", val);
setlocale(LC_NUMERIC, old_locale);
free(old_locale);
return 0;
}
#elif defined(_WIN32)
static int read_double_locale(const char *str, double *val)
{
char *end;
double value;
_locale_t locale = _create_locale(LC_NUMERIC, "C");
if (!locale)
return -ENOMEM;
value = _strtod_l(str, &end, locale);
_free_locale(locale);
if (end == str)
return -EINVAL;
*val = value;
return 0;
}
static int write_double_locale(char *buf, size_t len, double val)
{
_locale_t locale = _create_locale(LC_NUMERIC, "C");
if (!locale)
return -ENOMEM;
_snprintf_l(buf, len, "%f", locale, val);
_free_locale(locale);
return 0;
}
#else
static int read_double_locale(const char *str, double *val)
{
char *end;
double value;
locale_t old_locale, new_locale;
new_locale = newlocale(LC_NUMERIC_MASK, "C", (locale_t) 0);
if (!new_locale)
return -errno;
old_locale = uselocale(new_locale);
value = strtod(str, &end);
uselocale(old_locale);
freelocale(new_locale);
if (end == str)
return -EINVAL;
*val = value;
return 0;
}
static int write_double_locale(char *buf, size_t len, double val)
{
locale_t old_locale, new_locale;
new_locale = newlocale(LC_NUMERIC_MASK, "C", (locale_t) 0);
if (!new_locale)
return -errno;
old_locale = uselocale(new_locale);
iio_snprintf(buf, len, "%f", val);
uselocale(old_locale);
freelocale(new_locale);
return 0;
}
#endif
#endif
int read_double(const char *str, double *val)
{
#ifdef LOCALE_SUPPORT
return read_double_locale(str, val);
#else
char *end;
double value = strtod(str, &end);
if (end == str)
return -EINVAL;
*val = value;
return 0;
#endif
}
int write_double(char *buf, size_t len, double val)
{
#ifdef LOCALE_SUPPORT
return write_double_locale(buf, len, val);
#else
iio_snprintf(buf, len, "%f", val);
return 0;
#endif
}
void iio_library_get_version(unsigned int *major,
unsigned int *minor, char git_tag[8])
{
if (major)
*major = LIBIIO_VERSION_MAJOR;
if (minor)
*minor = LIBIIO_VERSION_MINOR;
if (git_tag) {
strncpy(git_tag, LIBIIO_VERSION_GIT, 8);
git_tag[7] = '\0';
}
}
void iio_strerror(int err, char *buf, size_t len)
{
#if defined(_WIN32)
int ret = strerror_s(buf, len, err);
#elif defined(HAS_STRERROR_R)
int ret = strerror_r(err, buf, len);
#else
/* no strerror_s, no strerror_r... just use the default message */
int ret = 0xf7de;
#endif
if (ret != 0)
iio_snprintf(buf, len, "Unknown error %i", err);
}
char *iio_strdup(const char *str)
{
#if defined(_WIN32)
return _strdup(str);
#elif defined(HAS_STRDUP)
return strdup(str);
#else
size_t len = strlen(str);
char *buf = malloc(len + 1);
if (buf)
memcpy(buf, str, len + 1);
return buf;
#endif
}
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