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 "debug.h"
  14 #include "heap.h"
  15
  16 typedef struct {
  17         ATOM atom;
  18         HGLOBAL16 handle;
  19 } ENVTABLE;
  20
  21 static ENVTABLE EnvTable[20];
  22
  23 static ENVTABLE *SearchEnvTable(ATOM atom)
  24 {
  25     INT16 i;
  26
  27     for (i = 19; i >= 0; i--) {
  28       if (EnvTable[i].atom == atom)
  29         return &EnvTable[i];
  30     }
  31     return NULL;
  32 }
  33
  34 static ATOM GDI_GetNullPortAtom(void)
  35 {
  36     static ATOM NullPortAtom = 0;
  37     if (!NullPortAtom)
  38     {
  39         char NullPort[256];
  40
  41         GetProfileStringA( "windows", "nullport", "none",
  42                              NullPort, sizeof(NullPort) );
  43         NullPortAtom = AddAtomA( NullPort );
  44     }
  45     return NullPortAtom;
  46 }
  47
  48 static ATOM PortNameToAtom(LPCSTR lpPortName, BOOL16 add)
  49 {
  50     char *p;
  51     BOOL needfree = FALSE;
  52     ATOM ret;
  53
  54     if (lpPortName[strlen(lpPortName) - 1] == ':') {
  55         p = HEAP_strdupA(GetProcessHeap(), 0, lpPortName);
  56         p[strlen(lpPortName) - 1] = '\0';
  57         needfree = TRUE;
  58     }
  59     else
  60         p = (char *)lpPortName;
  61
  62     if (add)
  63         ret = AddAtomA(p);
  64     else
  65         ret =  FindAtomA(p);
  66
  67     if(needfree) HeapFree(GetProcessHeap(), 0, p);
  68
  69     return ret;
  70 }
  71
  72
  73 /***********************************************************************
  74  *           GetEnvironment   (GDI.134)
  75  */
  76 INT16 WINAPI GetEnvironment16(LPCSTR lpPortName, LPDEVMODE16 lpdev, UINT16 nMaxSize)
  77 {
  78     ATOM atom;
  79     LPCSTR p;
  80     ENVTABLE *env;
  81     WORD size;
  82
  83     TRACE(gdi, "('%s', %p, %d)\n", lpPortName, lpdev, nMaxSize);
  84
  85     if (!(atom = PortNameToAtom(lpPortName, FALSE)))
  86         return 0;
  87     if (atom == GDI_GetNullPortAtom())
  88         if (!(atom = FindAtomA((LPCSTR)lpdev)))
  89             return 0;
  90     if (!(env = SearchEnvTable(atom)))
  91         return 0;
  92     size = GlobalSize16(env->handle);
  93     if (!lpdev) return 0;
  94     if (size < nMaxSize) nMaxSize = size;
  95     if (!(p = GlobalLock16(env->handle))) return 0;
  96     memcpy(lpdev, p, nMaxSize);
  97     GlobalUnlock16(env->handle);
  98     return nMaxSize;
  99 }
 100
 101
 102 /***********************************************************************
 103  *          SetEnvironment   (GDI.132)
 104  */
 105 INT16 WINAPI SetEnvironment16(LPCSTR lpPortName, LPDEVMODE16 lpdev, UINT16 nCount)
 106 {
 107     ATOM atom;
 108     BOOL16 nullport = FALSE;
 109     LPSTR p;
 110     ENVTABLE *env;
 111     HGLOBAL16 handle;
 112
 113     TRACE(gdi, "('%s', %p, %d)\n", lpPortName, lpdev, nCount);
 114
 115     if ((atom = PortNameToAtom(lpPortName, FALSE))) {
 116         if (atom == GDI_GetNullPortAtom()) {
 117             nullport = TRUE;
 118             atom = FindAtomA((LPCSTR)lpdev);
 119         }
 120         env = SearchEnvTable(atom);
 121         GlobalFree16(env->handle);
 122         env->atom = 0;
 123     }
 124     if (nCount) { /* store DEVMODE struct */
 125         if (nullport)
 126             p = (LPSTR)lpdev;
 127         else
 128             p = (LPSTR)lpPortName;
 129
 130         if ((atom = PortNameToAtom(p, TRUE))
 131          && (env = SearchEnvTable(0))
 132          && (handle = GlobalAlloc16(GMEM_SHARE|GMEM_MOVEABLE, nCount))) {
 133             if (!(p = GlobalLock16(handle))) {
 134                 GlobalFree16(handle);
 135                 return 0;
 136             }
 137             env->atom = atom;
 138             env->handle = handle;
 139             memcpy(p, lpdev, nCount);
 140             GlobalUnlock16(handle);
 141             return handle;
 142         }
 143         else return 0;
 144     }
 145     else return -1;
 146 }