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/*
* cook - file construction tool
* Copyright (C) 1999, 2006, 2007 Peter Miller;
* All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
*
* MANIFEST: functions to manipulate executable file extensions
*/
#include <common/exeext.h>
#include <common/ac/ctype.h>
#include <common/ac/string.h>
#include <common/exeext.h>
#include <common/libdir.h>
static int
memcasecmp(const char *s1, const char *s2, size_t n)
{
int c1;
int c2;
while (n > 0)
{
c1 = *s1++;
if (isupper(c1))
c1 = tolower(c1);
c2 = *s2++;
if (isupper(c2))
c1 = tolower(c2);
if (c1 != c2)
return ((unsigned char)c1 - (unsigned char)c2);
--n;
}
return 0;
}
static int
look_for_suffix(const char *stem, const char *suffix)
{
size_t main_len;
size_t suffix_len;
size_t idx;
main_len = strlen(stem);
suffix_len = strlen(suffix);
if (main_len < suffix_len)
return -1;
idx = main_len - suffix_len;
if (0 != memcasecmp(stem + idx, suffix, suffix_len))
return -1;
return idx;
}
const char *
exeext_nth(int n)
{
switch (n)
{
case 0:
return executable_extension_get();
#if defined(__CYGWIN__) || defined(__CYGWIN32__) || defined(__NUTC__)
case 1:
return ".bat";
case 2:
return ".cmd";
case 3:
return ".com";
case 4:
return ".exe";
#endif
}
return 0;
}
int
exeext(const char *s)
{
int n;
const char *suffix;
int result;
for (n = 0;; ++n)
{
suffix = exeext_nth(n);
if (!suffix || !*suffix)
return -1;
result = look_for_suffix(s, suffix);
if (result >= 0)
return result;
}
}
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