dlls/gdi.exe16/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 <stdarg.h>
  25 #include <stdio.h>
  26 #include <string.h>
  27
  28 #include "windef.h"
  29 #include "winbase.h"
  30 #include "wingdi.h"
  31 #include "wine/wingdi16.h"
  32 #include "wine/debug.h"
  33
  34 WINE_DEFAULT_DEBUG_CHANNEL(gdi);
  35
  36 typedef struct {
  37         ATOM atom;
  38         HGLOBAL16 handle;
  39 } ENVTABLE;
  40
  41 static ENVTABLE EnvTable[20];
  42
  43 static ENVTABLE *SearchEnvTable(ATOM atom)
  44 {
  45     INT16 i;
  46
  47     for (i = 19; i >= 0; i--) {
  48       if (EnvTable[i].atom == atom)
  49         return &EnvTable[i];
  50     }
  51     return NULL;
  52 }
  53
  54 static ATOM GDI_GetNullPortAtom(void)
  55 {
  56     static ATOM NullPortAtom = 0;
  57     if (!NullPortAtom)
  58     {
  59         char NullPort[256];
  60
  61         GetProfileStringA( "windows", "nullport", "none",
  62                              NullPort, sizeof(NullPort) );
  63         NullPortAtom = AddAtomA( NullPort );
  64     }
  65     return NullPortAtom;
  66 }
  67
  68 static ATOM PortNameToAtom(LPCSTR lpPortName, BOOL16 add)
  69 {
  70     char buffer[256];
  71
  72     lstrcpynA( buffer, lpPortName, sizeof(buffer) );
  73
  74     if (buffer[0] && buffer[strlen(buffer)-1] == ':') buffer[strlen(buffer)-1] = 0;
  75
  76     if (add)
  77         return AddAtomA(buffer);
  78     else
  79         return FindAtomA(buffer);
  80 }
  81
  82
  83 /***********************************************************************
  84  *           GetEnvironment   (GDI.133)
  85  */
  86 INT16 WINAPI GetEnvironment16(LPCSTR lpPortName, LPDEVMODEA lpdev, UINT16 nMaxSize)
  87 {
  88     ATOM atom;
  89     LPCSTR p;
  90     ENVTABLE *env;
  91     WORD size;
  92
  93     TRACE("('%s', %p, %d)\n", lpPortName, lpdev, nMaxSize);
  94
  95     if (!(atom = PortNameToAtom(lpPortName, FALSE)))
  96         return 0;
  97     if (atom == GDI_GetNullPortAtom())
  98         if (!(atom = FindAtomA((LPCSTR)lpdev)))
  99             return 0;
 100     if (!(env = SearchEnvTable(atom)))
 101         return 0;
 102     size = GlobalSize16(env->handle);
 103     if (!lpdev) return 0;
 104     if (size < nMaxSize) nMaxSize = size;
 105     if (!(p = GlobalLock16(env->handle))) return 0;
 106     memcpy(lpdev, p, nMaxSize);
 107     GlobalUnlock16(env->handle);
 108     return nMaxSize;
 109 }
 110
 111
 112 /***********************************************************************
 113  *          SetEnvironment   (GDI.132)
 114  */
 115 INT16 WINAPI SetEnvironment16(LPCSTR lpPortName, LPDEVMODEA lpdev, UINT16 nCount)
 116 {
 117     ATOM atom;
 118     BOOL16 nullport = FALSE;
 119     LPCSTR port_name;
 120     LPSTR device_mode;
 121     ENVTABLE *env;
 122     HGLOBAL16 handle;
 123
 124     TRACE("('%s', %p, %d)\n", lpPortName, lpdev, nCount);
 125
 126     if ((atom = PortNameToAtom(lpPortName, FALSE))) {
 127         if (atom == GDI_GetNullPortAtom()) {
 128             nullport = TRUE;
 129             atom = FindAtomA((LPCSTR)lpdev);
 130         }
 131         env = SearchEnvTable(atom);
 132         GlobalFree16(env->handle);
 133         env->atom = 0;
 134     }
 135     if (nCount) { /* store DEVMODE struct */
 136         if (nullport)
 137             port_name = (LPSTR)lpdev;
 138         else
 139             port_name = lpPortName;
 140
 141         if ((atom = PortNameToAtom(port_name, TRUE))
 142          && (env = SearchEnvTable(0))
 143          && (handle = GlobalAlloc16(GMEM_SHARE|GMEM_MOVEABLE, nCount))) {
 144             if (!(device_mode = GlobalLock16(handle))) {
 145                 GlobalFree16(handle);
 146                 return 0;
 147             }
 148             env->atom = atom;
 149             env->handle = handle;
 150             memcpy(device_mode, lpdev, nCount);
 151             GlobalUnlock16(handle);
 152             return handle;
 153         }
 154         else return 0;
 155     }
 156     else return -1;
 157 }