wine/dlls/msvcrt/environ.c
2005-02-10 19:19:35 +00:00

142 lines
3.9 KiB
C

/*
* msvcrt.dll environment functions
*
* Copyright 1996,1998 Marcus Meissner
* Copyright 1996 Jukka Iivonen
* Copyright 1997,2000 Uwe Bonnes
* Copyright 2000 Jon Griffiths
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "wine/unicode.h"
#include "msvcrt.h"
#include "wine/debug.h"
WINE_DEFAULT_DEBUG_CHANNEL(msvcrt);
/*********************************************************************
* getenv (MSVCRT.@)
*/
char *MSVCRT_getenv(const char *name)
{
char **environ;
unsigned int length=strlen(name);
for (environ = *__p__environ(); *environ; environ++)
{
char *str = *environ;
char *pos = strchr(str,'=');
if (pos && ((pos - str) == length) && !strncasecmp(str,name,length))
{
TRACE("(%s): got %s\n", debugstr_a(name), debugstr_a(pos + 1));
return pos + 1;
}
}
return NULL;
}
/*********************************************************************
* _wgetenv (MSVCRT.@)
*/
MSVCRT_wchar_t *_wgetenv(const MSVCRT_wchar_t *name)
{
MSVCRT_wchar_t **environ;
unsigned int length=strlenW(name);
for (environ = *__p__wenviron(); *environ; environ++)
{
MSVCRT_wchar_t *str = *environ;
MSVCRT_wchar_t *pos = strchrW(str,'=');
if (pos && ((pos - str) == length) && !strncmpiW(str,name,length))
{
TRACE("(%s): got %s\n", debugstr_w(name), debugstr_w(pos + 1));
return pos + 1;
}
}
return NULL;
}
/*********************************************************************
* _putenv (MSVCRT.@)
*/
int _putenv(const char *str)
{
char name[256], value[512];
char *dst = name;
int ret;
TRACE("%s\n", str);
if (!str)
return -1;
while (*str && *str != '=')
*dst++ = *str++;
if (!*str++)
return -1;
*dst = '\0';
dst = value;
while (*str)
*dst++ = *str++;
*dst = '\0';
ret = SetEnvironmentVariableA(name, value[0] ? value : NULL) ? 0 : -1;
/* _putenv returns success on deletion of nonexistent variable, unlike [Rtl]SetEnvironmentVariable */
if ((ret == -1) && (GetLastError() == ERROR_ENVVAR_NOT_FOUND)) ret = 0;
/* Update the __p__environ array only when already initialized */
if (_environ)
_environ = msvcrt_SnapshotOfEnvironmentA(_environ);
if (_wenviron)
_wenviron = msvcrt_SnapshotOfEnvironmentW(_wenviron);
return ret;
}
/*********************************************************************
* _wputenv (MSVCRT.@)
*/
int _wputenv(const MSVCRT_wchar_t *str)
{
MSVCRT_wchar_t name[256], value[512];
MSVCRT_wchar_t *dst = name;
int ret;
TRACE("%s\n", debugstr_w(str));
if (!str)
return -1;
while (*str && *str != '=')
*dst++ = *str++;
if (!*str++)
return -1;
*dst = 0;
dst = value;
while (*str)
*dst++ = *str++;
*dst = 0;
ret = SetEnvironmentVariableW(name, value[0] ? value : NULL) ? 0 : -1;
/* _putenv returns success on deletion of nonexistent variable, unlike [Rtl]SetEnvironmentVariable */
if ((ret == -1) && (GetLastError() == ERROR_ENVVAR_NOT_FOUND)) ret = 0;
/* Update the __p__environ array only when already initialized */
if (_environ)
_environ = msvcrt_SnapshotOfEnvironmentA(_environ);
if (_wenviron)
_wenviron = msvcrt_SnapshotOfEnvironmentW(_wenviron);
return ret;
}