119 lines
3.8 KiB
C++
119 lines
3.8 KiB
C++
/*
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* CiderPress
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* Copyright (C) 2014 by CiderPress authors. All Rights Reserved.
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* See the file LICENSE for distribution terms.
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*/
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/*
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* Debug log support.
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*/
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#include "stdafx.h"
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DebugLog::DebugLog(const WCHAR* logFile)
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: fLogFp(NULL)
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{
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fPid = getpid();
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if (logFile == NULL) {
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return;
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}
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PathName debugPath(logFile);
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time_t now = time(NULL);
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time_t when = debugPath.GetModWhen();
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if (when > 0 && now - when > kStaleLog) {
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/* log file is more than 8 hours old, remove it */
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/* [consider opening it and truncating with chsize() instead, so we
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don't hose somebody's custom access permissions. ++ATM 20041015] */
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_wunlink(logFile);
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}
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fLogFp = _wfopen(logFile, L"a");
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if (fLogFp == NULL) {
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#ifdef _DEBUG
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_CrtDbgReport(_CRT_WARN, __FILE__, __LINE__, NULL,
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"Unable to open %ls: %d\n", logFile, errno);
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#endif
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} else {
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// disable buffering so we don't lose anything if app crashes
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setvbuf(fLogFp, NULL, _IONBF, 0);
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fprintf(fLogFp, "\n");
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if (when > 0) {
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fprintf(fLogFp,
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"(Log file was %.3f hours old; logs are reset after %.3f)\n",
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(now - when) / 3600.0, kStaleLog / 3600.0);
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}
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}
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}
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DebugLog::~DebugLog() {
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if (fLogFp != NULL) {
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fclose(fLogFp);
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}
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}
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void DebugLog::Log(LogSeverity severity, const char* file, int line,
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_Printf_format_string_ const char* format, ...)
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{
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#ifndef _DEBUG
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if (fLogFp == NULL) {
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// nothing to do, don't waste time formatting the string
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return;
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}
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#endif
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static const char kSeverityChars[] = "?VDIWE";
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if (severity < 0 || severity > sizeof(kSeverityChars) - 1) {
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severity = LOG_UNKNOWN;
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}
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if (severity == LOG_VERBOSE) {
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// Globally disable. They still get compiled, which helps to
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// prevent bit-rot. TODO: be fancier and have LOGV map to
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// a do-nothing inline function that the compiler will effectively
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// eliminate.
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return;
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}
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va_list argptr;
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char textBuf[4096];
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// TODO: _vsnprintf() doesn't deal with "%ls" well. If it encounters a
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// character it can't translate, it stops and returns -1. This is
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// very annoying if you're trying to print a wide-char filename that
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// includes characters that aren't in CP-1252.
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//
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// We can probably fix this by converting "format" to a wide string,
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// printing with _vsnwprintf(), and then converting the output back
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// to narrow manually (selecting options that prevent it from stopping
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// mid-string on failure). As an optimization, we only need to do this
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// if the format string includes a "%ls" specifier.
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//
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// The interpretation of plain "%s" will change if we use a wide printf
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// function (it's a Microsoft extension, not ANSI behavior), so we'd also
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// want to check for "%s" and complain if we see it. All callers must
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// use explicit "%hs" or "%ls".
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va_start(argptr, format);
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(void) _vsnprintf(textBuf, NELEM(textBuf) - 1, format, argptr);
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va_end(argptr);
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textBuf[NELEM(textBuf) - 1] = '\0';
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if (fLogFp) {
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struct tm tmbuf;
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time_t now = time(NULL);
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localtime_s(&tmbuf, &now);
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// The pid is useful when we spawn a new instance of CiderPress
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// to handle a disk image or NuFX archive inside an archive. The
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// file is opened in "append" mode, so we shouldn't collide.
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fprintf(fLogFp, "%02d:%02d:%02d %05u %c %s\n", tmbuf.tm_hour,
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tmbuf.tm_min, tmbuf.tm_sec, fPid, kSeverityChars[severity],
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textBuf);
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}
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#ifdef _DEBUG
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if (_CrtDbgReport(_CRT_WARN, file, line, NULL, "%s\n", textBuf) == 1) {
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// "retry" button causes a debugger break
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_CrtDbgBreak();
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}
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#endif
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}
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