dlls/gdi32/env.c

   1 /*
   2  * Driver Environment functions
   3  *
   4  * Note: This has NOTHING to do with the task/process environment!
   5  *
   6  * Copyright 1997 Marcus Meissner
   7  * Copyright 1998 Andreas Mohr
   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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  22  */
  23
  24 #include "config.h"
  25
  26 #include <stdarg.h>
  27 #include <stdio.h>
  28 #include <string.h>
  29
  30 #include "windef.h"
  31 #include "winbase.h"
  32 #include "wingdi.h"
  33 #include "wine/wingdi16.h"
  34 #include "wine/debug.h"
  35
  36 WINE_DEFAULT_DEBUG_CHANNEL(gdi);
  37
  38 typedef struct {
  39         ATOM atom;
  40         HGLOBAL16 handle;
  41 } ENVTABLE;
  42
  43 static ENVTABLE EnvTable[20];
  44
  45 static ENVTABLE *SearchEnvTable(ATOM atom)
  46 {
  47     INT16 i;
  48
  49     for (i = 19; i >= 0; i--) {
  50       if (EnvTable[i].atom == atom)
  51         return &EnvTable[i];
  52     }
  53     return NULL;
  54 }
  55
  56 static ATOM GDI_GetNullPortAtom(void)
  57 {
  58     static ATOM NullPortAtom = 0;
  59     if (!NullPortAtom)
  60     {
  61         char NullPort[256];
  62
  63         GetProfileStringA( "windows", "nullport", "none",
  64                              NullPort, sizeof(NullPort) );
  65         NullPortAtom = AddAtomA( NullPort );
  66     }
  67     return NullPortAtom;
  68 }
  69
  70 static ATOM PortNameToAtom(LPCSTR lpPortName, BOOL16 add)
  71 {
  72     char buffer[256];
  73
  74     lstrcpynA( buffer, lpPortName, sizeof(buffer) );
  75
  76     if (buffer[0] && buffer[strlen(buffer)-1] == ':') buffer[strlen(buffer)-1] = 0;
  77
  78     if (add)
  79         return AddAtomA(buffer);
  80     else
  81         return FindAtomA(buffer);
  82 }
  83
  84
  85 /***********************************************************************
  86  *           GetEnvironment   (GDI.133)
  87  */
  88 INT16 WINAPI GetEnvironment16(LPCSTR lpPortName, LPDEVMODEA lpdev, UINT16 nMaxSize)
  89 {
  90     ATOM atom;
  91     LPCSTR p;
  92     ENVTABLE *env;
  93     WORD size;
  94
  95     TRACE("('%s', %p, %d)\n", lpPortName, lpdev, nMaxSize);
  96
  97     if (!(atom = PortNameToAtom(lpPortName, FALSE)))
  98         return 0;
  99     if (atom == GDI_GetNullPortAtom())
 100         if (!(atom = FindAtomA((LPCSTR)lpdev)))
 101             return 0;
 102     if (!(env = SearchEnvTable(atom)))
 103         return 0;
 104     size = GlobalSize16(env->handle);
 105     if (!lpdev) return 0;
 106     if (size < nMaxSize) nMaxSize = size;
 107     if (!(p = GlobalLock16(env->handle))) return 0;
 108     memcpy(lpdev, p, nMaxSize);
 109     GlobalUnlock16(env->handle);
 110     return nMaxSize;
 111 }
 112
 113
 114 /***********************************************************************
 115  *          SetEnvironment   (GDI.132)
 116  */
 117 INT16 WINAPI SetEnvironment16(LPCSTR lpPortName, LPDEVMODEA lpdev, UINT16 nCount)
 118 {
 119     ATOM atom;
 120     BOOL16 nullport = FALSE;
 121     LPCSTR port_name;
 122     LPSTR device_mode;
 123     ENVTABLE *env;
 124     HGLOBAL16 handle;
 125
 126     TRACE("('%s', %p, %d)\n", lpPortName, lpdev, nCount);
 127
 128     if ((atom = PortNameToAtom(lpPortName, FALSE))) {
 129         if (atom == GDI_GetNullPortAtom()) {
 130             nullport = TRUE;
 131             atom = FindAtomA((LPCSTR)lpdev);
 132         }
 133         env = SearchEnvTable(atom);
 134         GlobalFree16(env->handle);
 135         env->atom = 0;
 136     }
 137     if (nCount) { /* store DEVMODE struct */
 138         if (nullport)
 139             port_name = (LPSTR)lpdev;
 140         else
 141             port_name = lpPortName;
 142
 143         if ((atom = PortNameToAtom(port_name, TRUE))
 144          && (env = SearchEnvTable(0))
 145          && (handle = GlobalAlloc16(GMEM_SHARE|GMEM_MOVEABLE, nCount))) {
 146             if (!(device_mode = GlobalLock16(handle))) {
 147                 GlobalFree16(handle);
 148                 return 0;
 149             }
 150             env->atom = atom;
 151             env->handle = handle;
 152             memcpy(device_mode, lpdev, nCount);
 153             GlobalUnlock16(handle);
 154             return handle;
 155         }
 156         else return 0;
 157     }
 158     else return -1;
 159 }