mc/pc/trace_nt.c

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/* trace_nt.c - Debugging routines
for Midnight Commander, under Win32
Written 951215 by Juan Grigera <grigera@isis.unlp.edu.ar>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include <config.h>
#ifdef HAVE_TRACE
#include <stdio.h>
#ifdef _OS_NT
#include <windows.h>
#endif
#include <errno.h>
#include "trace_nt.h"
/* Global variables */
int __win32_tracing_enabled = 1;
static int _win32_tracing_started = 0;
static FILE *__win32_trace_f = NULL;
/* Definitions */
#define TRACE_FILE "mcTrace.out"
/* Prototypes - static funcs */
static void _win32InitTrace (void);
static void _win32EndTrace (void);
static const char* GetLastErrorText(void);
static char *visbuf(const char *buf);
/*
void _win32InitTrace()
This func will open file TRACE_FILE for output and add _win32EndTrace to onexit
list of funcs.
*/
static void _win32InitTrace()
{
if (!_win32_tracing_started) {
_win32_tracing_started = 1;
__win32_trace_f = fopen(TRACE_FILE, "wt");
if (__win32_trace_f == NULL) {
printf("Midnight Commander[DEBUG]: Cannot open trace file '" TRACE_FILE "': %s \n", strerror(errno));
}
atexit (&_win32EndTrace);
}
}
/*
void _win32EndTrace()
This func closes file TRACE_FILE if opened.
*/
static void _win32EndTrace()
{
if (_win32_tracing_started) {
_win32_tracing_started = 0;
if (__win32_trace_f)
fclose (__win32_trace_f);
}
}
/*
void _win32Trace (char *fmt, ...)
Format and output debug strings. They are written to TRACE_FILE.
Debug Output is controlled by SetTrace (see below).
Win32: Output is sent to Debug Output also.
*/
void _win32Trace (const char *fmt, ...)
{
va_list ap;
char buffer[256];
char *vp;
if (!_win32_tracing_started)
_win32InitTrace();
va_start(ap, fmt);
vsprintf(buffer, fmt, ap);
va_end(ap);
vp = buffer;
#ifdef _OS_NT /* Write Output to Debug monitor also */
OutputDebugString (vp);
#if (_MSC_VER > 800) /* Don't write newline in MSVC++ 1.0, has a dammed bug in Debug Output screen */
OutputDebugString ("\n");
#endif
#endif
if(__win32_trace_f)
fprintf (__win32_trace_f, "%s\n", vp);
}
/*
void SetTrace (int trace)
Control debug output. Turn it of or on.
trace: 0 = off, 1 = on.
*/
void _win32SetTrace (int trace)
{
/* Prototypes - interlan funcs */
__win32_tracing_enabled = trace;
}
void _win32TraceOn ()
{
__win32_tracing_enabled = 1;
}
void _win32TraceOff()
{
__win32_tracing_enabled = 0;
}
#ifdef _OS_NT
/*
void DebugFailedWin32APICall (const char* name, int line, const char* file)
Report a System call failure.
name - text containing the source code that called the offending API func
line, file - place of "name" in code
See Also: definition of win32APICALL macro.
*/
void _win32DebugFailedWin32APICall (const char* name, int line, const char* file)
{
_win32Trace ("%s(%d): Call to Win32 API Failed. \"%s\".", file, line, name);
_win32Trace (" System Error (%d): %s. ", GetLastError(), GetLastErrorText());
}
#endif
/*
void DebugAssertionFailed (const char* name, int line, const char* file)
Report a logical condition failure. (e.g. a bad argument to a func)
name - text containing the logical condition
line, file - place of "name" in code
See Also: definition of ASSERT macro.
*/
void _win32DebugAssertionFailed (const char* name, int line, const char* file)
{
_win32Trace ("%s(%d): Assertion failed! \"%s\".", file, line, name);
}
/* const char* GetLastErrorText()
Retrieves the text associated with the last system error.
Returns pointer to static buffer. Contents valid till next call
*/
static const char* GetLastErrorText()
{
#define MAX_MSG_SIZE 256
static char szMsgBuf[MAX_MSG_SIZE];
DWORD dwError, dwRes;
dwError = GetLastError ();
dwRes = FormatMessage (
FORMAT_MESSAGE_FROM_SYSTEM,
NULL,
dwError,
MAKELANGID (LANG_ENGLISH, SUBLANG_ENGLISH_US),
szMsgBuf,
MAX_MSG_SIZE,
NULL);
if (0 == dwRes) {
sprintf (szMsgBuf, "FormatMessage failed with %d", GetLastError());
}
return szMsgBuf;
}
#endif /*HAVE_TRACE*/