/**********************************************************************
* pextension.c
* Manage file extensions
*
* Copyright (C) 2008-2009 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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.
* 3. Neither the name NuttX nor the names of its 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.
*
**********************************************************************/
/**********************************************************************
* Included Files
**********************************************************************/
#include <stdbool.h>
#include <string.h>
#include "keywords.h"
#include "pdefs.h"
#include "paslib.h"
/***********************************************************************/
bool extension(const char *inName, const char *ext, char *outName,
bool force_default)
{
int namelen = strlen(inName);
int extlen;
int copylen;
char *lastdot;
/* Find the position of the last occurrence of '.' in inName */
lastdot = strrchr(inName, '.');
/* If a file extension is in the input line and no default is forced, then
* copy the rest of the input line
*/
if ((lastdot != NULL) && (!force_default))
{
/* Make sure that the string (with its null terminator) will fit in
* the allocated buffer.
*/
if ((namelen + 1) > FNAME_SIZE)
{
/* It won't */
return true;
}
else
{
/* Copy the string. */
strcpy(outName, inName);
}
}
else
{
/* The name has no extension or we must replace the extension. */
extlen = strlen(ext) + 1; /* extension + null terminator */
if (lastdot != NULL)
{
/* It has an extension. We must copy everything except the
* last dot and the following extension.
*/
copylen = namelen - strlen(lastdot); /* name - . - terminator */
}
else
{
/* It has no extension. We must copy everything */
copylen = namelen + 1; /* whole name with null termination */
}
/* Make sure that the string (with its null terminator) will fit in
* the allocated buffer.
*/
if ((copylen + extlen + 1) > FNAME_SIZE)
{
/* It won't */
return true;
}
else
{
/* It will Copy file name up to, but excluding, the '.' */
memcpy(outName, inName, copylen);
/* Then copy the extension */
outName[copylen] = '.';
memcpy(&outName[copylen+1], ext, extlen);
}
}
return false;
} /* end extension */
/***********************************************************************/
