Initial Commit

src/engine/log.cpp

@@ -0,0 +1,143 @@
+#include <stdio.h>
+#include <string.h>
+#include <time.h>
+#include <assert.h>
+#include <SDL3/SDL.h>
+
+#include "engine/log.h"
+
+static char* g_month[12] = { "Jan","Feb","Mar","Apr","May","Jun","Jul","Aug","Sep","Oct","Nov","Dec" };
+static int g_day_in_month[12] = { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };
+int build_id;
+FILE* g_logFile;
+
+void CalculateBuildNumber()
+{
+	static int start_day = 3;
+	static int start_month = 10;
+	static int start_year = 2021;
+
+	// Calculating build
+	int build = 0, mnum = 0, dnum, ynum, mcnt;
+	char mon[4];
+	char buf[128];
+	strcpy(buf, __DATE__);
+	sscanf(buf, "%s %d %d", mon, &dnum, &ynum);
+	for (int i = 0; i < 12; i++) {
+#ifdef WIN32
+		if (stricmp(g_month[i], mon) == 0) {
+#else
+		if (strcasecmp(g_month[i], mon) == 0) {
+#endif // WIN32
+			mnum = i;
+			break;
+		}
+	}
+
+	build_id = (ynum - start_year) * 365 + dnum - start_day;
+
+	for (int i = 0; i < mnum; ++i)
+		build_id += g_day_in_month[i];
+
+	for (int i = 0; i < start_month - 1; ++i)
+		build_id -= g_day_in_month[i];
+}
+
+void Logger::Open()
+{
+	CalculateBuildNumber();
+
+#if 0//def WIN32
+	char UserName[256];
+	DWORD dwUserName = 256;
+
+	if (!GetUserNameA(UserName, &dwUserName))
+		strcpy(UserName, "unnamed");
+
+	char logfilename[256];
+	sprintf(logfilename, "engine_%s.log", UserName);
+#else
+	char logfilename[256];
+	sprintf(logfilename, "engine.log");
+#endif
+
+	g_logFile = fopen(logfilename, "w");
+
+	Msg("'%s' build %d, %s", "engine", build_id, __DATE__);
+}
+
+void Logger::Close()
+{
+	if (g_logFile) {
+		fclose(g_logFile);
+		g_logFile = nullptr;
+	}
+}
+
+void Logger::Msg(const char* fmt, ...)
+{
+	va_list args;
+
+	va_start(args, fmt);
+	MsgArg(fmt, args);
+	va_end(args);
+}
+
+void Logger::MsgArg(const char* fmt, va_list args)
+{
+	char buffer[2048];
+
+	int len = vsnprintf(buffer, sizeof(buffer), fmt, args);
+	assert(len >= 0);
+	assert(len < 2048);
+	SDL_assert_always(len >= 0);
+	SDL_assert_always(len < 2048);
+
+	//if (len >= sizeof(buffer))
+	//	len = sizeof(buffer) - 1;
+
+	//if (buffer[len] != '\n' && len < sizeof(buffer) - 1)
+	//{
+	//	buffer[len++] = '\n';
+	//	buffer[len] = '\0';
+	//}
+
+	len = strlen(buffer);
+
+	if (buffer[len - 1] != '\n')
+	{
+		buffer[len++] = '\n';
+		buffer[len] = '\0';
+	}
+	
+	//time_t t = time(0);
+	//struct tm* ti = localtime(&t);
+
+	//char timestr[256];
+	//sprintf(timestr, "%s", asctime(ti));
+	//timestr[strlen(timestr) - 1] = '\0';
+
+	//sprintf(buffer2, "[%s] %s", timestr, buffer);
+
+	if (g_logFile)
+	{
+		fwrite(buffer, sizeof(char), len, g_logFile);
+		fflush(g_logFile);
+	}
+
+#ifdef WIN32
+	//OutputDebugStringA(buffer);
+	fwrite(buffer, sizeof(char), len, stdout);
+#else
+	fwrite(buffer, sizeof(char), len, stdout);
+#endif
+}
+
+void Msg(const char* fmt, ...)
+{
+	va_list args;
+
+	va_start(args, fmt);
+	Logger::MsgArg(fmt, args);
+	va_end(args);
+}