#include "log.h"#define MAX_CALLBACKS 32typedef struct {log_LogFn fn;void *udata;int level;} Callback;static struct {void *udata;log_LockFn lock;int level;bool quiet;Callback callbacks[MAX_CALLBACKS];} L;static const char *level_strings[] = {"TRACE", "DEBUG", "INFO", "WARN", "ERROR", "FATAL"};#ifdef LOG_USE_COLORstatic const char *level_colors[] = {"\x1b[94m", "\x1b[36m", "\x1b[32m", "\x1b[33m", "\x1b[31m", "\x1b[35m"};#endifstatic void stdout_callback(log_Event *ev) {char buf[16];buf[strftime(buf, sizeof(buf), "%H:%M:%S", ev->time)] = '\0';#ifdef LOG_USE_COLORfprintf(ev->udata, "%s %s%-5s\x1b[0m \x1b[90m%s:%d:\x1b[0m ", buf, level_colors[ev->level], level_strings[ev->level], ev->file, ev->line);#elsefprintf(ev->udata, "%s %-5s %s:%d: ", buf, level_strings[ev->level], ev->file, ev->line);#endifvfprintf(ev->udata, ev->fmt, ev->ap);fprintf(ev->udata, "\n");fflush(ev->udata);}static void file_callback(log_Event *ev) {char buf[64];buf[strftime(buf, sizeof(buf), "%Y-%m-%d %H:%M:%S", ev->time)] = '\0';fprintf(ev->udata, "%s %-5s %s:%d: ", buf, level_strings[ev->level], ev->file, ev->line);vfprintf(ev->udata, ev->fmt, ev->ap);fprintf(ev->udata, "\n");fflush(ev->udata);}static void lock(void) { if (L.lock) { L.lock(true, L.udata); }}static void unlock(void) {if (L.lock) { L.lock(false, L.udata); }}const char* log_level_string(int level) { return level_strings[level];}void log_set_lock(log_LockFn fn, void *udata) {L.lock = fn;L.udata = udata;}void log_set_level(int level) {L.level = level;}void log_set_quiet(bool enable) {L.quiet = enable;}int log_add_callback(log_LogFn fn, void *udata, int level) {for (int i = 0; i < MAX_CALLBACKS; i++) {if (!L.callbacks[i].fn) {L.callbacks[i] = (Callback) { fn, udata, level };return 0;}}return -1;}int log_add_fp(FILE *fp, int level) {return log_add_callback(file_callback, fp, level);}static void init_event(log_Event *ev, void *udata) {if (!ev->time) {time_t t = time(NULL);ev->time = localtime(&t);}ev->udata = udata;}void log_log(int level, const char *file, int line, const char *fmt, ...) {log_Event ev = {.fmt = fmt,.file = file,.line = line,.level = level,};lock();if (!L.quiet && level >= L.level) {init_event(&ev, stderr);va_start(ev.ap, fmt);stdout_callback(&ev);va_end(ev.ap);}for (int i = 0; i < MAX_CALLBACKS && L.callbacks[i].fn; i++) {Callback *cb = &L.callbacks[i];if (level >= cb->level) {init_event(&ev, cb->udata);va_start(ev.ap, fmt);cb->fn(&ev);va_end(ev.ap);}}unlock();}