adtools/clib2

/*
 * $Id: stdio_sscanf_hook_entry.c,v 1.6 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 _STDIO_HEADERS_H
#include "stdio_headers.h"
#endif /* _STDIO_HEADERS_H */

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

int
__sscanf_hook_entry(
    struct iob *                    string_iob,
    struct file_action_message *    fam)
{
    int result = EOF;
    int num_bytes;

    assert( fam != NULL && string_iob != NULL );

    if(fam->fam_Action != file_action_read)
    {
        fam->fam_Error = EBADF;
        goto out;
    }

    assert( string_iob->iob_StringPosition >= 0 );
    assert( string_iob->iob_StringLength >= 0 );

    if(string_iob->iob_StringPosition < string_iob->iob_StringLength)
    {
        int num_bytes_left;

        num_bytes_left = string_iob->iob_StringLength - string_iob->iob_StringPosition;

        num_bytes = fam->fam_Size;
        if(num_bytes > num_bytes_left)
            num_bytes = num_bytes_left;

        assert( fam->fam_Data != NULL );
        assert( num_bytes >= 0 );

        memmove(fam->fam_Data,&string_iob->iob_String[string_iob->iob_StringPosition],(size_t)num_bytes);
        string_iob->iob_StringPosition += num_bytes;
    }
    else
    {
        num_bytes = 0;
    }

    result = num_bytes;

 out:

    return(result);
}