/*
* Copyright (c) 2006 Josef Cejka
* Copyright (c) 2008 Jakub Jermar
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* - The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/** @addtogroup libc
* @{
*/
/** @file
*/
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <stddef.h>
#include <str.h>
#include <printf_core.h>
static int asprintf_str_write(const char *str, size_t count, void *unused)
{
return str_nlength(str, count);
}
static int asprintf_wstr_write(const char32_t *str, size_t count, void *unused)
{
return wstr_nlength(str, count);
}
int vprintf_length(const char *fmt, va_list args)
{
printf_spec_t ps = {
asprintf_str_write,
asprintf_wstr_write,
NULL
};
return printf_core(fmt, &ps, args);
}
int printf_length(const char *fmt, ...)
{
va_list args;
va_start(args, fmt);
int ret = vprintf_length(fmt, args);
va_end(args);
return ret;
}
/** Allocate and print to string.
*
* @param strp Address of the pointer where to store the address of
* the newly allocated string.
* @fmt Format string.
* @args Variable argument list
*
* @return Number of characters printed or an error code.
*
*/
int vasprintf(char **strp, const char *fmt, va_list args)
{
va_list args2;
va_copy(args2, args);
int ret = vsnprintf(NULL, 0, fmt, args2);
va_end(args2);
if (ret >= 0) {
*strp = malloc(ret + 1);
if (*strp == NULL)
return -1;
vsnprintf(*strp, ret + 1, fmt, args);
}
return ret;
}
/** Allocate and print to string.
*
* @param strp Address of the pointer where to store the address of
* the newly allocated string.
* @fmt Format string.
*
* @return Number of characters printed or an error code.
*
*/
int asprintf(char **strp, const char *fmt, ...)
{
va_list args;
va_start(args, fmt);
int ret = vasprintf(strp, fmt, args);
va_end(args);
return ret;
}
/** @}
*/