1 files changed, 88 insertions, 0 deletions
diff --git a/src/log.c b/src/log.c
new file mode 100644
index 0000000..2d7eaa2
--- /dev/null
+++ b/src/log.c
@@ -0,0 +1,88 @@
+#include "log.h"
+
+#include <stdarg.h>
+#include <stdio.h>
+#include <time.h>
+
+static struct {
+    log_LockProc lock_proc;
+    LogLevelE lvl;
+    b32 quiet;
+    FILE *log_file;
+} L;
+
+static const char *level_strings[] = {
+  "TRACE", "DEBUG", "INFO", "WARN", "ERROR", "FATAL"
+};
+
+#ifndef LOG_NO_COLOR
+static const char *level_colors[] = {
+  "\x1b[94m", "\x1b[36m", "\x1b[32m", "\x1b[33m", "\x1b[31m", "\x1b[35m"
+};
+#endif
+
+const char *log_get_level() {
+    return level_strings[L.lvl];
+}
+
+void log_set_level(LogLevelE lvl) {
+    L.lvl = lvl;
+}
+
+void log_set_quiet(b32 quiet) {
+    L.quiet = quiet;
+}
+
+void log_set_lock(log_LockProc proc) {
+    L.lock_proc = proc;
+}
+
+void log_set_fp(FILE *log_file) {
+    L.log_file = log_file;
+}
+
+static inline void   lock() { if (L.lock_proc) L.lock_proc( true); }
+static inline void unlock() { if (L.lock_proc) L.lock_proc(false); }
+
+static inline void write_to_file(LogLevelE lvl, const char *src_file, u64 src_line, const char *fmt, struct tm* time, va_list va) {
+    if (!L.log_file) { return; }
+    char time_str[64];
+    time_str[strftime(time_str, sizeof(time_str), "%Y-%m-%d %H:%M:%S", time)] = '\0';
+
+    fprintf(L.log_file, "%s %-5s%s:%lu ", time_str, level_strings[lvl], src_file, src_line);
+    vfprintf(L.log_file, fmt, va);
+    fprintf(L.log_file, "\n");
+}
+
+void log_log(LogLevelE lvl, const char *src_file, u64 src_line, const char *fmt, ...) {
+    lock();
+
+    va_list va;
+    va_list fva;
+    va_start(va, fmt);
+    va_copy(fva, va);
+    va_end(va);
+
+    time_t t = time(NULL);
+    struct tm* time = localtime(&t);
+
+    if (L.quiet || lvl < L.lvl) { goto skip; }
+
+    char time_str[16];
+    time_str[strftime(time_str, sizeof(time_str), "%H:%M:%S", time)] = '\0';
+
+#ifndef LOG_NO_COLOR
+    fprintf(stdout, "%s %s%-5s\x1b[0m\x1b[90m%s:%lu:\x1b[0m ",
+        time_str, level_colors[lvl], level_strings[lvl], src_file, src_line);
+#else
+    fprintf(stdout, "%s %-5s %s:%lu: ",
+        time_str, level_strings[L.lvl], src_file, src_line);
+#endif /* ifndef LOG_NO_COLOR */
+
+    vfprintf(stdout, fmt, va);
+    fprintf(stdout, "\n");
+
+skip:
+    write_to_file(lvl, src_file, src_line, fmt, time, fva);
+    unlock();
+}