adtools/clib2

/*
 * $Id: stdio_vasprintf.c,v 1.12 2006-01-08 12:04:25 obarthel Exp $
 *
 * :ts=4
 *
 * Portable ISO 'C' (1994) runtime library for the Amiga computer
 * Copyright (c) 2002-2015 by Olaf Barthel <obarthel (at) gmx.net>
 * 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.
 *
 *   - Neither the name of Olaf Barthel nor the names of contributors
 *     may be used to endorse or promote products derived from this
 *     software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "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 COPYRIGHT OWNER OR CONTRIBUTORS 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.
 */

#ifndef _STDLIB_NULL_POINTER_CHECK_H
#include "stdlib_null_pointer_check.h"
#endif /* _STDLIB_NULL_POINTER_CHECK_H */

/****************************************************************************/

#ifndef _STDLIB_HEADERS_H
#include "stdlib_headers.h"
#endif /* _STDLIB_HEADERS_H */

#ifndef _STDIO_HEADERS_H
#include "stdio_headers.h"
#endif /* _STDIO_HEADERS_H */

/****************************************************************************/

#ifndef _STDLIB_MEMORY_H
#include "stdlib_memory.h"
#endif /* _STDLIB_MEMORY_H */

/****************************************************************************/

/* The following is not part of the ISO 'C' (1994) standard. */

/****************************************************************************/

#undef vasprintf

/****************************************************************************/

__static int
__vasprintf(const char *file,int line,char **ret,const char *format,va_list arg)
{
    struct iob string_iob;
    int result = EOF;
    char local_buffer[32];

    ENTER();

    SHOWPOINTER(ret);
    SHOWSTRING(format);

    assert( ret != NULL && format != NULL && arg != NULL );

    if(__check_abort_enabled)
        __check_abort();

    #if defined(CHECK_FOR_NULL_POINTERS)
    {
        if(ret == NULL || format == NULL || format == arg)
        {
            SHOWMSG("invalid parameters");

            __set_errno(EFAULT);
            goto out;
        }
    }
    #endif /* CHECK_FOR_NULL_POINTERS */

    (*ret) = NULL;

    __initialize_iob(&string_iob,__vasprintf_hook_entry,
        NULL,
        local_buffer,sizeof(local_buffer),
        -1,
        -1,
        IOBF_IN_USE | IOBF_WRITE | IOBF_BUFFER_MODE_NONE | IOBF_INTERNAL,
        NULL);

    string_iob.iob_String        = NULL;
    string_iob.iob_StringSize    = 0;
    string_iob.iob_File            = (char *)file;
    string_iob.iob_Line            = line;

    result = vfprintf((FILE *)&string_iob,format,arg);
    if(result < 0)
    {
        SHOWMSG("ouch. that didn't work");

        if(string_iob.iob_String != NULL)
            __free(string_iob.iob_String,string_iob.iob_File,string_iob.iob_Line);

        goto out;
    }

    SHOWSTRING(string_iob.iob_String);

    (*ret) = string_iob.iob_String;

 out:

    RETURN(result);
    return(result);
}

/****************************************************************************/

int
vasprintf(char **ret,const char *format,va_list arg)
{
    int result;

    result = __vasprintf(NULL,0,ret,format,arg);

    return(result);
}