Source code of Windows XP (NT5)
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//==========================================================================;
//
// THIS CODE AND INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY
// KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A PARTICULAR
// PURPOSE.
//
// Copyright (c) 1992-1995 Microsoft Corporation. All Rights Reserved.
//
//--------------------------------------------------------------------------;
//
// debug.c
//
// Description:
// This file contains code yanked from several places to provide debug
// support that works in win 16 and win 32.
//
//
//==========================================================================;
#include <windows.h>
#include <windowsx.h>
#include <stdarg.h>
#include "debug.h"
//
// since we don't UNICODE our debugging messages, use the ASCII entry
// points regardless of how we are compiled.
//
#ifdef _WIN32
#include <wchar.h>
#else
#define lstrcatA lstrcat
#define lstrlenA lstrlen
#define GetProfileIntA GetProfileInt
#define OutputDebugStringA OutputDebugString
#define wsprintfA wsprintf
#define MessageBoxA MessageBox
#endif
#ifdef USEDPF
//
//
//
BOOL __gfDbgEnabled = TRUE; // master enable
UINT __guDbgLevel = 0; // current debug level
#endif
#if defined(USERPF) || defined(USEDPF)
#define LOGSIZE 64000
char pStartOfBuffer[LOGSIZE];
static char* pEndOfBuffer = pStartOfBuffer+LOGSIZE;
char* pHead = pStartOfBuffer;
static char* pTail = pStartOfBuffer;
void listRemoveHead()
{
pHead += lstrlen(pHead) + 1 ;
if (pHead >= pEndOfBuffer) {
pHead = pStartOfBuffer ;
}
}
char* listGetHead()
{
return ( pHead ) ;
}
void listAddTail(char* lpszDebug)
{
int cchDebug ;
cchDebug = lstrlen(lpszDebug) ;
while (TRUE) {
while ( (pTail < pHead) && ((pTail+(cchDebug+1)) > pHead) ) {
listRemoveHead() ;
}
if ((pTail+(cchDebug+1)+2) > pEndOfBuffer) {
for ( ; pTail < pEndOfBuffer-1 ; pTail++ ) {
*pTail = 'X' ;
}
*pTail = '\0' ;
pTail = pStartOfBuffer ;
} else {
lstrcpyn(pTail, lpszDebug, pEndOfBuffer-pTail) ;
pTail += (cchDebug+1) ;
*pTail = '\0' ;
break ;
}
}
}
//--------------------------------------------------------------------------;
//
// DbgDumpQueue
//
// Description:
//
// Arguments:
//
// Return (void):
// No value is returned.
//
//--------------------------------------------------------------------------;
VOID DbgDumpQueue()
{
char* pszDebug;
pszDebug = listGetHead() ;
while ('\0' != *pszDebug) {
OutputDebugString(pszDebug) ;
listRemoveHead() ;
pszDebug = listGetHead() ;
}
return;
}
//--------------------------------------------------------------------------;
//
// void DbgQueueString
//
// Description:
//
//
// Arguments:
// LPSTR sz:
//
// Return (void):
// No value is returned.
//
//--------------------------------------------------------------------------;
void DbgQueueString(LPSTR pString)
{
listAddTail(pString);
}
//--------------------------------------------------------------------------;
//
// void DbgVPrintF
//
// Description:
//
//
// Arguments:
// LPSTR szFormat:
//
// va_list va:
//
// Return (void):
// No value is returned.
//
//--------------------------------------------------------------------------;
void FAR CDECL DbgVPrintF
(
LPSTR szFormat,
va_list va
)
{
char ach[DEBUG_MAX_LINE_LEN];
BOOL fDebugBreak = FALSE;
BOOL fPrefix = TRUE;
BOOL fCRLF = TRUE;
BOOL fQueue = FALSE;
BOOL fDumpQueue = FALSE;
ach[0] = '\0';
for (;;)
{
switch (*szFormat)
{
case '!':
fDebugBreak = TRUE;
szFormat++;
continue;
case '`':
fPrefix = FALSE;
szFormat++;
continue;
case '~':
fCRLF = FALSE;
szFormat++;
continue;
case ';':
fQueue = TRUE;
if (';' == *(szFormat+1)) {
fQueue = FALSE;
fDumpQueue = TRUE;
szFormat++;
}
szFormat++;
continue;
}
break;
}
if (fDebugBreak)
{
ach[0] = '\007';
ach[1] = '\0';
}
if (fPrefix)
{
lstrcatA(ach, DEBUG_MODULE_NAME ": ");
}
#ifdef WIN95
{
char *psz = NULL;
char szDfs[1024]={0};
strcpy(szDfs,szFormat); // make a local copy of format string
while (psz = strstr(szDfs,"%p")) // find each %p
*(psz+1) = 'x'; // replace each %p with %x
#ifdef _WIN32
wvsprintfA(ach + lstrlenA(ach), szDfs, va); // use the local format string
#else
wvsprintf(ach + lstrlenA(ach), szDfs, (LPSTR)va); // use the local format string
#endif
}
#else
{
#ifdef _WIN32
wvsprintfA(ach + lstrlenA(ach), szFormat, va);
#else
wvsprintf(ach + lstrlenA(ach), szFormat, (LPSTR)va);
#endif
}
#endif
if (fCRLF)
{
lstrcatA(ach, "\r\n");
}
if (fDumpQueue)
{
DbgDumpQueue();
}
if (fQueue) {
DbgQueueString(ach);
} else {
OutputDebugStringA(ach);
}
if (fDebugBreak)
{
DebugBreak();
}
} // DbgVPrintF()
#endif // USERPF || USEDPF
#ifdef USEDPF
//--------------------------------------------------------------------------;
//
// void dprintf
//
// Description:
// dprintf() is called by the DPF() macro if DEBUG is defined at compile
// time. It is recommended that you only use the DPF() macro to call
// this function--so you don't have to put #ifdef DEBUG around all
// of your code.
//
// Arguments:
// UINT uDbgLevel:
//
// LPSTR szFormat:
//
// Return (void):
// No value is returned.
//
//--------------------------------------------------------------------------;
void FAR CDECL dprintf
(
UINT uDbgLevel,
LPSTR szFormat,
...
)
{
va_list va;
if (!__gfDbgEnabled || (__guDbgLevel < uDbgLevel))
return;
va_start(va, szFormat);
DbgVPrintF(szFormat, va);
va_end(va);
} // dprintf()
//--------------------------------------------------------------------------;
//
// BOOL DbgEnable
//
// Description:
//
//
// Arguments:
// BOOL fEnable:
//
// Return (BOOL):
// Returns the previous debugging state.
//
//--------------------------------------------------------------------------;
BOOL WINAPI DbgEnable
(
BOOL fEnable
)
{
BOOL fOldState;
fOldState = __gfDbgEnabled;
__gfDbgEnabled = fEnable;
return (fOldState);
} // DbgEnable()
//--------------------------------------------------------------------------;
//
// UINT DbgSetLevel
//
// Description:
//
//
// Arguments:
// UINT uLevel:
//
// Return (UINT):
// Returns the previous debugging level.
//
//--------------------------------------------------------------------------;
UINT WINAPI DbgSetLevel
(
UINT uLevel
)
{
UINT uOldLevel;
uOldLevel = __guDbgLevel;
__guDbgLevel = uLevel;
return (uOldLevel);
} // DbgSetLevel()
//--------------------------------------------------------------------------;
//
// UINT DbgGetLevel
//
// Description:
//
//
// Arguments:
// None.
//
// Return (UINT):
// Returns the current debugging level.
//
//--------------------------------------------------------------------------;
UINT WINAPI DbgGetLevel
(
void
)
{
return (__guDbgLevel);
} // DbgGetLevel()
//--------------------------------------------------------------------------;
//
// UINT DbgInitialize
//
// Description:
//
//
// Arguments:
// BOOL fEnable:
//
// Return (UINT):
// Returns the debugging level that was set.
//
//--------------------------------------------------------------------------;
UINT WINAPI DbgInitialize
(
BOOL fEnable
)
{
UINT uLevel;
uLevel = GetProfileIntA(DEBUG_SECTION, DEBUG_MODULE_NAME, (UINT)-1);
if ((UINT)-1 == uLevel)
{
//
// if the debug key is not present, then force debug output to
// be disabled. this way running a debug version of a component
// on a non-debugging machine will not generate output unless
// the debug key exists.
//
uLevel = 0;
fEnable = FALSE;
}
DbgSetLevel(uLevel);
DbgEnable(fEnable);
return (__guDbgLevel);
} // DbgInitialize()
#endif // #ifdef USEDPF
//--------------------------------------------------------------------------;
//
// void _Assert
//
// Description:
// This routine is called if the ASSERT macro (defined in debug.h)
// tests and expression that evaluates to FALSE. This routine
// displays an "assertion failed" message box allowing the user to
// abort the program, enter the debugger (the "retry" button), or
// ignore the assertion and continue executing. The message box
// displays the file name and line number of the _Assert() call.
//
// Arguments:
// char * szFile: Filename where assertion occurred.
// int iLine: Line number of assertion.
//
//--------------------------------------------------------------------------;
#ifdef USEASSERT
#ifndef _WIN32
#pragma warning(disable:4704)
#endif
void WINAPI _Assert
(
char * szFile,
int iLine,
char * szExpression
)
{
static char ach[400]; // debug output (avoid stack overflow)
int id;
#ifndef _WIN32
int iExitCode;
#endif
#ifdef DEBUG
if (__gfDbgEnabled)
{
wsprintfA(ach, "Assertion failed in file %s, line %d: (%s)", (LPSTR)szFile, iLine, (LPSTR)szExpression);
OutputDebugString(ach);
DebugBreak();
}
else
#endif
{
wsprintfA(ach, "Assertion failed in file %s, line %d: (%s) [Press RETRY to debug.]", (LPSTR)szFile, iLine, (LPSTR)szExpression);
id = MessageBoxA(NULL, ach, "Assertion Failed",
MB_SYSTEMMODAL | MB_ICONHAND | MB_ABORTRETRYIGNORE );
switch (id)
{
case IDABORT: // Kill the application.
#ifndef _WIN32
iExitCode = 0;
_asm {
mov ah, 4Ch;
mov al, BYTE PTR iExitCode;
int 21h;
}
#else
FatalAppExit(0, TEXT("Good Bye"));
#endif // WIN16
break;
case IDRETRY: // Break into the debugger.
DebugBreak();
break;
case IDIGNORE: // Ignore assertion, continue executing.
break;
}
}
} // _Assert
#endif // #ifdef USEASSERT
//--------------------------------------------------------------------------;
//
// void rprintf
//
// Description:
// rprintf() is called by the RPF() macro. It is just like dprintf,
// except that there is no level defined. RPF statements always
// translate to a debug output, regardless of level.
//
// Arguments:
// LPSTR szFormat:
//
// Return (void):
// No value is returned.
//
//--------------------------------------------------------------------------;
#ifdef USERPF
void CDECL rprintf
(
LPSTR szFormat,
...
)
{
va_list va;
va_start(va, szFormat);
DbgVPrintF(szFormat, va);
va_end(va);
}
#endif // USERPF
#ifndef _WIN32
#pragma warning(default:4704)
#endif