3 files changed, 177 insertions, 0 deletions
diff --git a/log/log.c b/log/log.c
new file mode 100755
index 0000000..2d3cbac
--- /dev/null
+++ b/log/log.c
@@ -0,0 +1,114 @@
+#include "log.h"
+
+
+static struct {
+	char *name;
+	int set;
+	FILE *fps[MAX_LOGFILES];
+	int nfps;
+	int stder;
+#ifdef COLOR
+	char *color;
+#endif
+} log_levels[LOG_LEVEL_COUNT] = {
+	{ 
+		.name = "DEBUG", .set = 1, .fps = {0}, .nfps = 0, .stder = 1,
+#ifdef COLOR
+		.color = "\e[38;2;255;255;0m"
+#endif
+	},
+	{
+		.name = "INFO", .set = 1, .fps = {0}, .nfps = 0, .stder = 1,
+#ifdef COLOR
+		.color = "\e[38;2;0;224;255m"
+#endif	
+	},
+	{
+		.name = "WARN", .set = 1, .fps = {0}, .nfps = 0, .stder = 1,
+#ifdef COLOR
+		.color = "\e[38;2;255;165;0m"
+#endif
+	},
+	{
+		.name = "ERROR", .set = 1, .fps = {0}, .nfps = 0, .stder = 1,
+#ifdef COLOR
+		.color = "\e[38;2;255;0;0m"
+#endif
+	}
+};
+
+static char time_format[16] = "%T";
+static int nanosecond_precision = 0;
+
+
+int log_set_stderr(int level, int of){
+	if(level >= 0 && level < LOG_LEVEL_COUNT){
+		return log_levels[level].stder = of;
+	}
+	return 0;
+}
+
+void log_set_level(int level, int of){
+	if(level >= 0 && level < LOG_LEVEL_COUNT){
+		log_levels[level].set = of;
+	}
+}
+
+int log_add_fp(int level, FILE *fp){
+	if(level >= 0 && level < LOG_LEVEL_COUNT && log_levels[level].nfps < MAX_LOGFILES-1){
+		log_levels[level].fps[log_levels[level].nfps++] = fp;
+		return 0;
+	}
+	return 1;
+}
+
+void log_time_format(char *tf){
+	strncpy(time_format, tf, sizeof(time_format)/sizeof(time_format[0]));
+}
+
+int log_nanoseconds(int n){
+	return nanosecond_precision = n%10;
+}
+
+void log_message(int level, char *file, int line, char *fmt, ...){
+	struct timespec ts;
+	clock_gettime(CLOCK_REALTIME, &ts);
+	if(level >= 0 && level < LOG_LEVEL_COUNT && log_levels[level].set){
+		struct tm *lt = localtime(&ts.tv_sec);
+		char t[32] = {0};
+		strftime(t, 31, time_format, lt);
+		char ns[9] = {0};
+		snprintf(ns, nanosecond_precision+1, "%ld", ts.tv_nsec);
+		char msg[MSG_LIMIT] = {0};
+		int written = snprintf(msg, MSG_LIMIT-2,
+#ifdef PID
+			"[%d] "
+#endif
+			"%s%s%s%s%s%s%s\t",
+#ifdef PID
+			getpid(),
+#endif
+			t, nanosecond_precision ? "." : "", ns,
+			t[0] != '\0' ? " " : "",
+#ifdef COLOR
+			log_levels[level].color,
+#else
+			"",
+#endif
+			log_levels[level].name, "\e[0m"
+		);
+		if(level == LOG_DEBUG){
+			written += snprintf(msg+written, MSG_LIMIT-2-written, "%s:%d: ",file, line);
+		}
+		va_list args;
+		va_start(args, fmt);
+		written += vsnprintf(msg+written, MSG_LIMIT-2-written, fmt, args);
+		msg[written] = '\n';
+		if(log_levels[level].stder) fputs(msg, stderr);
+		for(int i = 0; i < log_levels[level].nfps; i++){
+			if(log_levels[level].fps[i] != NULL)
+				fputs(msg, log_levels[level].fps[i++]);
+		}
+	}
+}
+
diff --git a/log/log.h b/log/log.h
new file mode 100755
index 0000000..09b93bb
--- /dev/null
+++ b/log/log.h
@@ -0,0 +1,41 @@
+#ifndef LOG_H
+#define LOG_H
+
+#define PID
+#define COLOR
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+#include <stdarg.h>
+#ifdef PID
+#include <unistd.h>
+#endif
+
+
+enum {
+	LOG_DEBUG,
+	LOG_INFO,
+	LOG_WARN,
+	LOG_ERROR,
+	LOG_LEVEL_COUNT
+};
+
+#define MAX_LOGFILES (8)
+#define MSG_LIMIT (256)
+
+
+int log_set_stderr(int level, int of);
+void log_set_level(int level, int of);
+int log_add_fp(int level, FILE *fp);
+void log_time_format(char *tf);
+int log_nanoseconds(int n);
+void log_message(int level, char *file, int line, char *fmt, ...);
+
+#define log_debug(...) log_message(LOG_DEBUG, __FILE__, __LINE__, __VA_ARGS__)
+#define log_info(...) log_message(LOG_INFO, __FILE__, __LINE__, __VA_ARGS__)
+#define log_warn(...) log_message(LOG_WARN, __FILE__, __LINE__, __VA_ARGS__)
+#define log_error(...) log_message(LOG_ERROR, __FILE__, __LINE__, __VA_ARGS__)
+
+#endif
diff --git a/log/main.c b/log/main.c
new file mode 100755
index 0000000..47ae6f7
--- /dev/null
+++ b/log/main.c
@@ -0,0 +1,22 @@
+#define COLOR
+#include "log.h"
+
+
+int main(void){
+
+	int r, g, b;
+	while(1){
+		printf("select RBG trio: ");
+		scanf("%d %d %d", &r, &g, &b);
+		if(r > 255) r = 255;
+		if(g > 255) g = 255;
+		if(b > 255) b = 255;
+		printf("%d %d %d\n", r, g, b);
+		printf("\t\e[38;2;%d;%d;%dmDEBUG%s\n", r, g, b, CRESET);
+		printf("\t\e[38;2;%d;%d;%dmINFO%s\n", r, g, b, CRESET);
+		printf("\t\e[38;2;%d;%d;%dmWARN%s\n", r, g, b, CRESET);
+		printf("\t\e[38;2;%d;%d;%dmERROR%s\n", r, g, b, CRESET);
+	}
+
+	return 0;
+}