ciderpress/diskimg/Global.cpp
2007-03-27 17:47:10 +00:00

190 lines
4.4 KiB
C++

/*
* CiderPress
* Copyright (C) 2007 by faddenSoft, LLC. All Rights Reserved.
* See the file LICENSE for distribution terms.
*/
/*
* Implementation of DiskImgLib globals.
*/
#include "StdAfx.h"
#include "DiskImgPriv.h"
#include "ASPI.h"
/*static*/ bool Global::fAppInitCalled = false;
/*static*/ ASPI* Global::fpASPI = nil;
/* global constant */
const char* DiskImgLib::kASPIDev = "ASPI:";
/*
* Perform one-time DLL initialization.
*/
/*static*/ DIError
Global::AppInit(void)
{
NuError nerr;
long major, minor, bug;
if (fAppInitCalled) {
WMSG0("DiskImg AppInit already called\n");
return kDIErrNone;
}
WMSG3("AppInit for DiskImg library v%d.%d.%d\n",
kDiskImgVersionMajor, kDiskImgVersionMinor, kDiskImgVersionBug);
#ifdef _WIN32
HMODULE hModule;
char fileNameBuf[256];
hModule = ::GetModuleHandle("DiskImg4.dll");
if (hModule != nil &&
::GetModuleFileName(hModule, fileNameBuf, sizeof(fileNameBuf)) != 0)
{
// GetModuleHandle does not increase ref count, so no need to release
WMSG1("DiskImg DLL loaded from '%s'\n", fileNameBuf);
} else {
WMSG0("Unable to get DiskImg DLL filename\n");
}
#endif
/*
* Make sure we're linked against a compatible version of NufxLib.
*/
nerr = NuGetVersion(&major, &minor, &bug, NULL, NULL);
if (nerr != kNuErrNone) {
WMSG0("Unable to get version number from NufxLib.");
return kDIErrNufxLibInitFailed;
}
if (major != kNuVersionMajor || minor < kNuVersionMinor) {
WMSG3("Unexpected NufxLib version %ld.%ld.%ld\n",
major, minor, bug);
return kDIErrNufxLibInitFailed;
}
/*
* Do one-time init over in the DiskImg class.
*/
DiskImg::CalcNibbleInvTables();
#ifdef HAVE_WINDOWS_CDROM
if (kAlwaysTryASPI || IsWin9x()) {
fpASPI = new ASPI;
if (fpASPI->Init() != kDIErrNone) {
delete fpASPI;
fpASPI = nil;
}
}
#endif
WMSG2("DiskImg HasSPTI=%d HasASPI=%d\n", GetHasSPTI(), GetHasASPI());
fAppInitCalled = true;
return kDIErrNone;
}
/*
* Perform cleanup at application shutdown time.
*/
/*static*/ DIError
Global::AppCleanup(void)
{
WMSG0("DiskImgLib cleanup\n");
delete fpASPI;
return kDIErrNone;
}
/*
* Simple getters.
*
* SPTI is enabled if we're in Win2K *and* ASPI isn't loaded. If ASPI is
* loaded, it can interfere with SPTI, so we want to stick with one or
* the other.
*/
#ifdef _WIN32
/*static*/ bool Global::GetHasSPTI(void) { return !IsWin9x() && fpASPI == nil; }
/*static*/ bool Global::GetHasASPI(void) { return fpASPI != nil; }
/*static*/ unsigned long Global::GetASPIVersion(void) {
assert(fpASPI != nil);
return fpASPI->GetVersion();
}
#else
/*static*/ bool Global::GetHasSPTI(void) { return false; }
/*static*/ bool Global::GetHasASPI(void) { return false; }
/*static*/ unsigned long Global::GetASPIVersion(void) { assert(false); return 0; }
#endif
/*
* Return current library versions.
*/
/*static*/ void
Global::GetVersion(long* pMajor, long* pMinor, long* pBug)
{
if (pMajor != nil)
*pMajor = kDiskImgVersionMajor;
if (pMinor != nil)
*pMinor = kDiskImgVersionMinor;
if (pBug != nil)
*pBug = kDiskImgVersionBug;
}
/*
* Pointer to debug message handler function.
*/
/*static*/ Global::DebugMsgHandler Global::gDebugMsgHandler = nil;
/*
* Change the debug message handler. The previous handler is returned.
*/
Global::DebugMsgHandler
Global::SetDebugMsgHandler(DebugMsgHandler handler)
{
DebugMsgHandler oldHandler;
oldHandler = gDebugMsgHandler;
gDebugMsgHandler = handler;
return oldHandler;
}
/*
* Send a debug message to the debug message handler.
*
* Even if _DEBUG_MSGS is disabled we can still get here from the NuFX error
* handler.
*/
/*static*/ void
Global::PrintDebugMsg(const char* file, int line, const char* fmt, ...)
{
if (gDebugMsgHandler == nil) {
/*
* This can happen if the app decides to bail with an exit()
* call. I'm not sure what's zapping the pointer.
*
* We get here on "-install" or "-uninstall", which really
* should be using a more Windows-friendly exit strategy.
*/
DebugBreak();
return;
}
char buf[512];
va_list args;
va_start(args, fmt);
#if defined(HAVE_VSNPRINTF)
(void) vsnprintf(buf, sizeof(buf), fmt, args);
#elif defined(HAVE__VSNPRINTF)
(void) _vsnprintf(buf, sizeof(buf), fmt, args);
#else
# error "hosed"
#endif
va_end(args);
buf[sizeof(buf)-1] = '\0';
(*gDebugMsgHandler)(file, line, buf);
}