dlls/gdi/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 <stdio.h>
  27 #include <string.h>
  28
  29 #include "gdi.h"
  30 #include "wine/debug.h"
  31
  32 WINE_DEFAULT_DEBUG_CHANNEL(gdi);
  33
  34 typedef struct {
  35         ATOM atom;
  36         HGLOBAL16 handle;
  37 } ENVTABLE;
  38
  39 static ENVTABLE EnvTable[20];
  40
  41 static ENVTABLE *SearchEnvTable(ATOM atom)
  42 {
  43     INT16 i;
  44
  45     for (i = 19; i >= 0; i--) {
  46       if (EnvTable[i].atom == atom)
  47         return &EnvTable[i];
  48     }
  49     return NULL;
  50 }
  51
  52 static ATOM GDI_GetNullPortAtom(void)
  53 {
  54     static ATOM NullPortAtom = 0;
  55     if (!NullPortAtom)
  56     {
  57         char NullPort[256];
  58
  59         GetProfileStringA( "windows", "nullport", "none",
  60                              NullPort, sizeof(NullPort) );
  61         NullPortAtom = AddAtomA( NullPort );
  62     }
  63     return NullPortAtom;
  64 }
  65
  66 static ATOM PortNameToAtom(LPCSTR lpPortName, BOOL16 add)
  67 {
  68     char buffer[256];
  69
  70     lstrcpynA( buffer, lpPortName, sizeof(buffer) );
  71
  72     if (buffer[0] && buffer[strlen(buffer)-1] == ':') buffer[strlen(buffer)-1] = 0;
  73
  74     if (add)
  75         return AddAtomA(buffer);
  76     else
  77         return FindAtomA(buffer);
  78 }
  79
  80
  81 /***********************************************************************
  82  *           GetEnvironment   (GDI.133)
  83  */
  84 INT16 WINAPI GetEnvironment16(LPCSTR lpPortName, LPDEVMODEA lpdev, UINT16 nMaxSize)
  85 {
  86     ATOM atom;
  87     LPCSTR p;
  88     ENVTABLE *env;
  89     WORD size;
  90
  91     TRACE("('%s', %p, %d)\n", lpPortName, lpdev, nMaxSize);
  92
  93     if (!(atom = PortNameToAtom(lpPortName, FALSE)))
  94         return 0;
  95     if (atom == GDI_GetNullPortAtom())
  96         if (!(atom = FindAtomA((LPCSTR)lpdev)))
  97             return 0;
  98     if (!(env = SearchEnvTable(atom)))
  99         return 0;
 100     size = GlobalSize16(env->handle);
 101     if (!lpdev) return 0;
 102     if (size < nMaxSize) nMaxSize = size;
 103     if (!(p = GlobalLock16(env->handle))) return 0;
 104     memcpy(lpdev, p, nMaxSize);
 105     GlobalUnlock16(env->handle);
 106     return nMaxSize;
 107 }
 108
 109
 110 /***********************************************************************
 111  *          SetEnvironment   (GDI.132)
 112  */
 113 INT16 WINAPI SetEnvironment16(LPCSTR lpPortName, LPDEVMODEA lpdev, UINT16 nCount)
 114 {
 115     ATOM atom;
 116     BOOL16 nullport = FALSE;
 117     LPSTR p;
 118     ENVTABLE *env;
 119     HGLOBAL16 handle;
 120
 121     TRACE("('%s', %p, %d)\n", lpPortName, lpdev, nCount);
 122
 123     if ((atom = PortNameToAtom(lpPortName, FALSE))) {
 124         if (atom == GDI_GetNullPortAtom()) {
 125             nullport = TRUE;
 126             atom = FindAtomA((LPCSTR)lpdev);
 127         }
 128         env = SearchEnvTable(atom);
 129         GlobalFree16(env->handle);
 130         env->atom = 0;
 131     }
 132     if (nCount) { /* store DEVMODE struct */
 133         if (nullport)
 134             p = (LPSTR)lpdev;
 135         else
 136             p = (LPSTR)lpPortName;
 137
 138         if ((atom = PortNameToAtom(p, TRUE))
 139          && (env = SearchEnvTable(0))
 140          && (handle = GlobalAlloc16(GMEM_SHARE|GMEM_MOVEABLE, nCount))) {
 141             if (!(p = GlobalLock16(handle))) {
 142                 GlobalFree16(handle);
 143                 return 0;
 144             }
 145             env->atom = atom;
 146             env->handle = handle;
 147             memcpy(p, lpdev, nCount);
 148             GlobalUnlock16(handle);
 149             return handle;
 150         }
 151         else return 0;
 152     }
 153     else return -1;
 154 }