graphics/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 #include <stdio.h>
  10 #include <string.h>
  11 #include "config.h"
  12 #include "gdi.h"
  13 #include "debugtools.h"
  14 #include "heap.h"
  15
  16 DEFAULT_DEBUG_CHANNEL(gdi)
  17
  18 typedef struct {
  19         ATOM atom;
  20         HGLOBAL16 handle;
  21 } ENVTABLE;
  22
  23 static ENVTABLE EnvTable[20];
  24
  25 static ENVTABLE *SearchEnvTable(ATOM atom)
  26 {
  27     INT16 i;
  28
  29     for (i = 19; i >= 0; i--) {
  30       if (EnvTable[i].atom == atom)
  31         return &EnvTable[i];
  32     }
  33     return NULL;
  34 }
  35
  36 static ATOM GDI_GetNullPortAtom(void)
  37 {
  38     static ATOM NullPortAtom = 0;
  39     if (!NullPortAtom)
  40     {
  41         char NullPort[256];
  42
  43         GetProfileStringA( "windows", "nullport", "none",
  44                              NullPort, sizeof(NullPort) );
  45         NullPortAtom = AddAtomA( NullPort );
  46     }
  47     return NullPortAtom;
  48 }
  49
  50 static ATOM PortNameToAtom(LPCSTR lpPortName, BOOL16 add)
  51 {
  52     char *p;
  53     BOOL needfree = FALSE;
  54     ATOM ret;
  55
  56     if (lpPortName[strlen(lpPortName) - 1] == ':') {
  57         p = HEAP_strdupA(GetProcessHeap(), 0, lpPortName);
  58         p[strlen(lpPortName) - 1] = '\0';
  59         needfree = TRUE;
  60     }
  61     else
  62         p = (char *)lpPortName;
  63
  64     if (add)
  65         ret = AddAtomA(p);
  66     else
  67         ret =  FindAtomA(p);
  68
  69     if(needfree) HeapFree(GetProcessHeap(), 0, p);
  70
  71     return ret;
  72 }
  73
  74
  75 /***********************************************************************
  76  *           GetEnvironment   (GDI.134)
  77  */
  78 INT16 WINAPI GetEnvironment16(LPCSTR lpPortName, LPDEVMODEA lpdev, UINT16 nMaxSize)
  79 {
  80     ATOM atom;
  81     LPCSTR p;
  82     ENVTABLE *env;
  83     WORD size;
  84
  85     TRACE("('%s', %p, %d)\n", lpPortName, lpdev, nMaxSize);
  86
  87     if (!(atom = PortNameToAtom(lpPortName, FALSE)))
  88         return 0;
  89     if (atom == GDI_GetNullPortAtom())
  90         if (!(atom = FindAtomA((LPCSTR)lpdev)))
  91             return 0;
  92     if (!(env = SearchEnvTable(atom)))
  93         return 0;
  94     size = GlobalSize16(env->handle);
  95     if (!lpdev) return 0;
  96     if (size < nMaxSize) nMaxSize = size;
  97     if (!(p = GlobalLock16(env->handle))) return 0;
  98     memcpy(lpdev, p, nMaxSize);
  99     GlobalUnlock16(env->handle);
 100     return nMaxSize;
 101 }
 102
 103
 104 /***********************************************************************
 105  *          SetEnvironment   (GDI.132)
 106  */
 107 INT16 WINAPI SetEnvironment16(LPCSTR lpPortName, LPDEVMODEA lpdev, UINT16 nCount)
 108 {
 109     ATOM atom;
 110     BOOL16 nullport = FALSE;
 111     LPSTR p;
 112     ENVTABLE *env;
 113     HGLOBAL16 handle;
 114
 115     TRACE("('%s', %p, %d)\n", lpPortName, lpdev, nCount);
 116
 117     if ((atom = PortNameToAtom(lpPortName, FALSE))) {
 118         if (atom == GDI_GetNullPortAtom()) {
 119             nullport = TRUE;
 120             atom = FindAtomA((LPCSTR)lpdev);
 121         }
 122         env = SearchEnvTable(atom);
 123         GlobalFree16(env->handle);
 124         env->atom = 0;
 125     }
 126     if (nCount) { /* store DEVMODE struct */
 127         if (nullport)
 128             p = (LPSTR)lpdev;
 129         else
 130             p = (LPSTR)lpPortName;
 131
 132         if ((atom = PortNameToAtom(p, TRUE))
 133          && (env = SearchEnvTable(0))
 134          && (handle = GlobalAlloc16(GMEM_SHARE|GMEM_MOVEABLE, nCount))) {
 135             if (!(p = GlobalLock16(handle))) {
 136                 GlobalFree16(handle);
 137                 return 0;
 138             }
 139             env->atom = atom;
 140             env->handle = handle;
 141             memcpy(p, lpdev, nCount);
 142             GlobalUnlock16(handle);
 143             return handle;
 144         }
 145         else return 0;
 146     }
 147     else return -1;
 148 }