Itemzflow/itemz-daemon/source/log.cpp

/*
 * 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"
#include <utils.hpp>

#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

//#define __ORBIS__ 1

#ifdef __ORBIS__
#define DGB_CHANNEL_TTYL 0
#endif


    static void stdout_callback(log_Event* ev) {
        char  buf[16];
        char format_buf[400];
        char print_buf[400];
        buf[strftime(buf, sizeof(buf), "%H:%M:%S", ev->time)] = '\0';

        vsnprintf(&format_buf[0], 399, ev->fmt, ev->ap);

        snprintf(&print_buf[0], 399, "%s %-5s %s:%d: %s\n", buf, level_strings[ev->level], ev->file, ev->line, &format_buf[0]);

#ifdef __ORBIS__
        sceKernelDebugOutText(DGB_CHANNEL_TTYL, &print_buf[0]);
#else
        log_info("%s\n" &print_buf[0]);
#endif
    }



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(
        (FILE*)ev->udata, "%s %-5s %s:%d: ",
        buf, level_strings[ev->level], ev->file, ev->line);
    vfprintf((FILE *)ev->udata, ev->fmt, ev->ap);
    fprintf((FILE *)ev->udata, "\n");
    fflush((FILE *)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();
}