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 "windows.h"
  12 #include "config.h"
  13 #include "gdi.h"
  14 #include "debug.h"
  15 #include "heap.h"
  16
  17 typedef struct {
  18         ATOM atom;
  19         HGLOBAL16 handle;
  20 } ENVTABLE;
  21
  22 static ENVTABLE EnvTable[20];
  23
  24 static ENVTABLE *SearchEnvTable(ATOM atom)
  25 {
  26     INT16 i;
  27
  28     for (i = 19; i >= 0; i--) {
  29       if (EnvTable[i].atom == atom)
  30         return &EnvTable[i];
  31     }
  32     return NULL;
  33 }
  34
  35 static ATOM GDI_GetNullPortAtom(void)
  36 {
  37     static ATOM NullPortAtom = 0;
  38     if (!NullPortAtom)
  39     {
  40         char NullPort[256];
  41
  42         GetProfileString32A( "windows", "nullport", "none",
  43                              NullPort, sizeof(NullPort) );
  44         NullPortAtom = AddAtom32A( NullPort );
  45     }
  46     return NullPortAtom;
  47 }
  48
  49 static ATOM PortNameToAtom(LPCSTR lpPortName, BOOL16 add)
  50 {
  51     char *p;
  52     BOOL32 needfree = FALSE;
  53     ATOM ret;
  54
  55     if (lpPortName[strlen(lpPortName) - 1] == ':') {
  56         p = HEAP_strdupA(GetProcessHeap(), 0, lpPortName);
  57         p[strlen(lpPortName) - 1] = '\0';
  58         needfree = TRUE;
  59     }
  60     else
  61         p = (char *)lpPortName;
  62
  63     if (add)
  64         ret = AddAtom32A(p);
  65     else
  66         ret =  FindAtom32A(p);
  67
  68     if(needfree) HeapFree(GetProcessHeap(), 0, p);
  69
  70     return ret;
  71 }
  72
  73
  74 /***********************************************************************
  75  *           GetEnvironment   (GDI.134)
  76  */
  77 INT16 WINAPI GetEnvironment(LPCSTR lpPortName, LPDEVMODE16 lpdev, UINT16 nMaxSize)
  78 {
  79     ATOM atom;
  80     LPCSTR p;
  81     ENVTABLE *env;
  82     WORD size;
  83
  84     TRACE(gdi, "('%s', %p, %d)\n", lpPortName, lpdev, nMaxSize);
  85
  86     if (!(atom = PortNameToAtom(lpPortName, FALSE)))
  87         return 0;
  88     if (atom == GDI_GetNullPortAtom())
  89         if (!(atom = FindAtom32A((LPCSTR)lpdev)))
  90             return 0;
  91     if (!(env = SearchEnvTable(atom)))
  92         return 0;
  93     size = GlobalSize16(env->handle);
  94     if (!lpdev) return 0;
  95     if (size < nMaxSize) nMaxSize = size;
  96     if (!(p = GlobalLock16(env->handle))) return 0;
  97     memcpy(lpdev, p, nMaxSize);
  98     GlobalUnlock16(env->handle);
  99     return nMaxSize;
 100 }
 101
 102
 103 /***********************************************************************
 104  *          SetEnvironment   (GDI.132)
 105  */
 106 INT16 WINAPI SetEnvironment(LPCSTR lpPortName, LPDEVMODE16 lpdev, UINT16 nCount)
 107 {
 108     ATOM atom;
 109     BOOL16 nullport = FALSE;
 110     LPSTR p;
 111     ENVTABLE *env;
 112     HGLOBAL16 handle;
 113
 114     TRACE(gdi, "('%s', %p, %d)\n", lpPortName, lpdev, nCount);
 115
 116     if ((atom = PortNameToAtom(lpPortName, FALSE))) {
 117         if (atom == GDI_GetNullPortAtom()) {
 118             nullport = TRUE;
 119             atom = FindAtom32A((LPCSTR)lpdev);
 120         }
 121         env = SearchEnvTable(atom);
 122         GlobalFree16(env->handle);
 123         env->atom = 0;
 124     }
 125     if (nCount) { /* store DEVMODE struct */
 126         if (nullport)
 127             p = (LPSTR)lpdev;
 128         else
 129             p = (LPSTR)lpPortName;
 130
 131         if ((atom = PortNameToAtom(p, TRUE))
 132          && (env = SearchEnvTable(0))
 133          && (handle = GlobalAlloc16(GMEM_SHARE|GMEM_MOVEABLE, nCount))) {
 134             if (!(p = GlobalLock16(handle))) {
 135                 GlobalFree16(handle);
 136                 return 0;
 137             }
 138             env->atom = atom;
 139             env->handle = handle;
 140             memcpy(p, lpdev, nCount);
 141             GlobalUnlock16(handle);
 142             return handle;
 143         }
 144         else return 0;
 145     }
 146     else return -1;
 147 }