dlls/msvcrt/environ.c

   1 /*
   2  * msvcrt.dll environment functions
   3  *
   4  * Copyright 1996,1998 Marcus Meissner
   5  * Copyright 1996 Jukka Iivonen
   6  * Copyright 1997,2000 Uwe Bonnes
   7  * Copyright 2000 Jon Griffiths
   8  *
   9  * This library is free software; you can redistribute it and/or
  10  * modify it under the terms of the GNU Lesser General Public
  11  * License as published by the Free Software Foundation; either
  12  * version 2.1 of the License, or (at your option) any later version.
  13  *
  14  * This library is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  17  * Lesser General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU Lesser General Public
  20  * License along with this library; if not, write to the Free Software
  21  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  22  */
  23 #include "wine/unicode.h"
  24 #include "msvcrt.h"
  25
  26 #include "msvcrt/stdlib.h"
  27
  28
  29 #include "wine/debug.h"
  30
  31 WINE_DEFAULT_DEBUG_CHANNEL(msvcrt);
  32
  33 /*********************************************************************
  34  *              getenv (MSVCRT.@)
  35  */
  36 char *MSVCRT_getenv(const char *name)
  37 {
  38   char *environ = GetEnvironmentStringsA();
  39   char *pp,*pos = NULL;
  40   unsigned int length=strlen(name);
  41
  42   for (pp = environ; (*pp); pp = pp + strlen(pp) +1)
  43   {
  44       pos =strchr(pp,'=');
  45       if ((pos) && ((pos - pp) == length))
  46       {
  47           if (!strncasecmp(pp,name,length)) break;
  48       }
  49   }
  50   if ((*pp)&& (pos))
  51   {
  52      pp = pos+1;
  53      TRACE("got %s\n",pp);
  54   }
  55   else
  56     pp = 0;
  57   FreeEnvironmentStringsA( environ );
  58   return pp;
  59 }
  60
  61 /*********************************************************************
  62  *              _wgetenv (MSVCRT.@)
  63  */
  64 WCHAR *_wgetenv(const WCHAR *name)
  65 {
  66   WCHAR* environ = GetEnvironmentStringsW();
  67   WCHAR* pp,*pos = NULL;
  68   unsigned int length=strlenW(name);
  69
  70   for (pp = environ; (*pp); pp = pp + strlenW(pp) + 1)
  71   {
  72       pos = strchrW(pp,'=');
  73       if ((pos) && ((pos - pp) == length))
  74       {
  75           if (!strncmpiW(pp,name,length))
  76           {
  77               pp = pos+1;
  78               TRACE("got %s\n",debugstr_w(pp));
  79               /* can't free pointer since we are returning it */
  80               /* should probably use MSVCRT_wenviron instead */
  81               FIXME( "memory leak\n" );
  82               return pp;
  83           }
  84       }
  85   }
  86   FreeEnvironmentStringsW( environ );
  87   return NULL;
  88 }
  89
  90 /*********************************************************************
  91  *              _putenv (MSVCRT.@)
  92  */
  93 int _putenv(const char *str)
  94 {
  95  char name[256], value[512];
  96  char *dst = name;
  97
  98  TRACE("%s\n", str);
  99
 100  if (!str)
 101    return -1;
 102  while (*str && *str != '=')
 103   *dst++ = *str++;
 104  if (!*str++)
 105    return -1;
 106  *dst = '\0';
 107  dst = value;
 108  while (*str)
 109   *dst++ = *str++;
 110  *dst = '\0';
 111
 112  return !SetEnvironmentVariableA(name, value[0] ? value : NULL);
 113 }
 114
 115 /*********************************************************************
 116  *              _wputenv (MSVCRT.@)
 117  */
 118 int _wputenv(const WCHAR *str)
 119 {
 120  WCHAR name[256], value[512];
 121  WCHAR *dst = name;
 122
 123  TRACE("%s\n", debugstr_w(str));
 124
 125  if (!str)
 126    return -1;
 127  while (*str && *str != (WCHAR)L'=')
 128   *dst++ = *str++;
 129  if (!*str++)
 130    return -1;
 131  *dst = (WCHAR)L'\0';
 132  dst = value;
 133  while (*str)
 134   *dst++ = *str++;
 135  *dst = (WCHAR)L'\0';
 136
 137  return !SetEnvironmentVariableW(name, value[0] ? value : NULL);
 138 }