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133 lines
4.1 KiB
133 lines
4.1 KiB
/********************************************************************** |
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* pextension.c |
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* Manage file extensions |
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* |
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* Copyright (C) 2008-2009 Gregory Nutt. All rights reserved. |
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* Author: Gregory Nutt <spudmonkey@racsa.co.cr> |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in |
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* the documentation and/or other materials provided with the |
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* distribution. |
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* 3. Neither the name NuttX nor the names of its contributors may be |
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* used to endorse or promote products derived from this software |
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* without specific prior written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS |
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED |
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN |
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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* POSSIBILITY OF SUCH DAMAGE. |
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* |
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**********************************************************************/ |
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/********************************************************************** |
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* Included Files |
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**********************************************************************/ |
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#include <stdbool.h> |
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#include <string.h> |
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#include "keywords.h" |
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#include "pdefs.h" |
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#include "paslib.h" |
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/***********************************************************************/ |
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bool extension(const char *inName, const char *ext, char *outName, |
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bool force_default) |
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{ |
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int namelen = strlen(inName); |
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int extlen; |
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int copylen; |
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char *lastdot; |
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/* Find the position of the last occurrence of '.' in inName */ |
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lastdot = strrchr(inName, '.'); |
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/* If a file extension is in the input line and no default is forced, then |
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* copy the rest of the input line |
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*/ |
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if ((lastdot != NULL) && (!force_default)) |
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{ |
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/* Make sure that the string (with its null terminator) will fit in |
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* the allocated buffer. |
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*/ |
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if ((namelen + 1) > FNAME_SIZE) |
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{ |
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/* It won't */ |
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return true; |
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} |
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else |
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{ |
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/* Copy the string. */ |
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strcpy(outName, inName); |
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} |
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} |
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else |
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{ |
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/* The name has no extension or we must replace the extension. */ |
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extlen = strlen(ext) + 1; /* extension + null terminator */ |
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if (lastdot != NULL) |
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{ |
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/* It has an extension. We must copy everything except the |
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* last dot and the following extension. |
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*/ |
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copylen = namelen - strlen(lastdot); /* name - . - terminator */ |
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} |
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else |
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{ |
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/* It has no extension. We must copy everything */ |
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copylen = namelen + 1; /* whole name with null termination */ |
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} |
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/* Make sure that the string (with its null terminator) will fit in |
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* the allocated buffer. |
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*/ |
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if ((copylen + extlen + 1) > FNAME_SIZE) |
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{ |
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/* It won't */ |
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return true; |
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} |
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else |
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{ |
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/* It will Copy file name up to, but excluding, the '.' */ |
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memcpy(outName, inName, copylen); |
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/* Then copy the extension */ |
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outName[copylen] = '.'; |
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memcpy(&outName[copylen+1], ext, extlen); |
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} |
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} |
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return false; |
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} /* end extension */ |
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/***********************************************************************/
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