ref: master
src/log.c
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/* * Copyright (c) 2020 rxi * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to * deal in the Software without restriction, including without limitation the * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or * sell copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS * IN THE SOFTWARE. */ #include "log.h" #define MAX_CALLBACKS 32 typedef 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_COLOR static const char *level_colors[] = { "\x1b[94m", "\x1b[36m", "\x1b[32m", "\x1b[33m", "\x1b[31m", "\x1b[35m" }; #endif static void stdout_callback(log_Event *ev) { char buf[16]; buf[strftime(buf, sizeof(buf), "%H:%M:%S", ev->time)] = '\0'; #ifdef LOG_USE_COLOR fprintf( 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); #else fprintf( ev->udata, "%s %-5s %s:%d: ", buf, level_strings[ev->level], ev->file, ev->line); #endif vfprintf(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(); } |