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Diffstat (limited to 'misc/pascal/libpas/pextension.c')
-rw-r--r-- | misc/pascal/libpas/pextension.c | 132 |
1 files changed, 132 insertions, 0 deletions
diff --git a/misc/pascal/libpas/pextension.c b/misc/pascal/libpas/pextension.c new file mode 100644 index 000000000..59f64f45f --- /dev/null +++ b/misc/pascal/libpas/pextension.c @@ -0,0 +1,132 @@ +/********************************************************************** + * pextension.c + * Manage file extensions + * + * Copyright (C) 2008 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 <string.h> + +#include "keywords.h" +#include "pdefs.h" +#include "paslib.h" + +/***********************************************************************/ + +boolean extension(const char *inName, const char *ext, char *outName, + boolean 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 */ + +/***********************************************************************/ |