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148 lines
3.3 KiB
C
148 lines
3.3 KiB
C
/*
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* Driver Environment functions
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*
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* Note: This has NOTHING to do with the task/process environment!
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*
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* Copyright 1997 Marcus Meissner
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* Copyright 1998 Andreas Mohr
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*/
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#include <stdio.h>
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#include <string.h>
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#include "config.h"
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#include "gdi.h"
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#include "debugtools.h"
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#include "heap.h"
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DEFAULT_DEBUG_CHANNEL(gdi)
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typedef struct {
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ATOM atom;
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HGLOBAL16 handle;
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} ENVTABLE;
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static ENVTABLE EnvTable[20];
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static ENVTABLE *SearchEnvTable(ATOM atom)
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{
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INT16 i;
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for (i = 19; i >= 0; i--) {
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if (EnvTable[i].atom == atom)
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return &EnvTable[i];
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}
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return NULL;
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}
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static ATOM GDI_GetNullPortAtom(void)
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{
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static ATOM NullPortAtom = 0;
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if (!NullPortAtom)
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{
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char NullPort[256];
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GetProfileStringA( "windows", "nullport", "none",
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NullPort, sizeof(NullPort) );
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NullPortAtom = AddAtomA( NullPort );
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}
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return NullPortAtom;
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}
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static ATOM PortNameToAtom(LPCSTR lpPortName, BOOL16 add)
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{
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char *p;
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BOOL needfree = FALSE;
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ATOM ret;
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if (lpPortName[strlen(lpPortName) - 1] == ':') {
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p = HEAP_strdupA(GetProcessHeap(), 0, lpPortName);
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p[strlen(lpPortName) - 1] = '\0';
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needfree = TRUE;
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}
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else
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p = (char *)lpPortName;
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if (add)
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ret = AddAtomA(p);
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else
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ret = FindAtomA(p);
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if(needfree) HeapFree(GetProcessHeap(), 0, p);
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return ret;
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}
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/***********************************************************************
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* GetEnvironment (GDI.134)
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*/
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INT16 WINAPI GetEnvironment16(LPCSTR lpPortName, LPDEVMODEA lpdev, UINT16 nMaxSize)
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{
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ATOM atom;
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LPCSTR p;
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ENVTABLE *env;
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WORD size;
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TRACE("('%s', %p, %d)\n", lpPortName, lpdev, nMaxSize);
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if (!(atom = PortNameToAtom(lpPortName, FALSE)))
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return 0;
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if (atom == GDI_GetNullPortAtom())
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if (!(atom = FindAtomA((LPCSTR)lpdev)))
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return 0;
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if (!(env = SearchEnvTable(atom)))
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return 0;
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size = GlobalSize16(env->handle);
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if (!lpdev) return 0;
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if (size < nMaxSize) nMaxSize = size;
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if (!(p = GlobalLock16(env->handle))) return 0;
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memcpy(lpdev, p, nMaxSize);
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GlobalUnlock16(env->handle);
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return nMaxSize;
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}
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/***********************************************************************
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* SetEnvironment (GDI.132)
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*/
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INT16 WINAPI SetEnvironment16(LPCSTR lpPortName, LPDEVMODEA lpdev, UINT16 nCount)
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{
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ATOM atom;
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BOOL16 nullport = FALSE;
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LPSTR p;
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ENVTABLE *env;
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HGLOBAL16 handle;
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TRACE("('%s', %p, %d)\n", lpPortName, lpdev, nCount);
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if ((atom = PortNameToAtom(lpPortName, FALSE))) {
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if (atom == GDI_GetNullPortAtom()) {
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nullport = TRUE;
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atom = FindAtomA((LPCSTR)lpdev);
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}
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env = SearchEnvTable(atom);
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GlobalFree16(env->handle);
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env->atom = 0;
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}
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if (nCount) { /* store DEVMODE struct */
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if (nullport)
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p = (LPSTR)lpdev;
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else
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p = (LPSTR)lpPortName;
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if ((atom = PortNameToAtom(p, TRUE))
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&& (env = SearchEnvTable(0))
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&& (handle = GlobalAlloc16(GMEM_SHARE|GMEM_MOVEABLE, nCount))) {
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if (!(p = GlobalLock16(handle))) {
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GlobalFree16(handle);
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return 0;
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}
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env->atom = atom;
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env->handle = handle;
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memcpy(p, lpdev, nCount);
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GlobalUnlock16(handle);
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return handle;
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}
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else return 0;
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}
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else return -1;
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}
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