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/*
* log.c
*
* Copyright (c) 2024 Nikias Bassen. All Rights Reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdarg.h>
#include <time.h>
#ifdef _WIN32
#include <windows.h>
#else
#include <sys/time.h>
#endif
#include <errno.h>
#include <libimobiledevice-glue/thread.h>
#include <plist/plist.h>
#include "log.h"
static int stderr_enabled = 1;
enum loglevel log_level = LL_VERBOSE;
enum loglevel print_level = LL_INFO;
static logger_print_func print_func = NULL;
const char *_level_label[6] = {
" <Error>",
"<Warning>",
" <Notice>",
" <Info>",
"<Verbose>",
" <Debug>"
};
// Reference: https://stackoverflow.com/a/2390626/1806760
// Initializer/finalizer sample for MSVC and GCC/Clang.
// 2010-2016 Joe Lowe. Released into the public domain.
#ifdef __cplusplus
#define INITIALIZER(f) \
static void f(void); \
struct f##_t_ { f##_t_(void) { f(); } }; static f##_t_ f##_; \
static void f(void)
#elif defined(_MSC_VER)
#pragma section(".CRT$XCU",read)
#define INITIALIZER2_(f,p) \
static void f(void); \
__declspec(allocate(".CRT$XCU")) void (*f##_)(void) = f; \
__pragma(comment(linker,"/include:" p #f "_")) \
static void f(void)
#ifdef _WIN64
#define INITIALIZER(f) INITIALIZER2_(f,"")
#else
#define INITIALIZER(f) INITIALIZER2_(f,"_")
#endif
#else
#define INITIALIZER(f) \
static void f(void) __attribute__((__constructor__)); \
static void f(void)
#endif
static mutex_t log_mutex;
static void logger_deinit(void)
{
mutex_destroy(&log_mutex);
}
INITIALIZER(logger_init)
{
mutex_init(&log_mutex);
atexit(logger_deinit);
}
void logger(enum loglevel level, const char *fmt, ...)
{
va_list ap;
va_list ap2;
char *fs;
if (level > log_level)
return;
mutex_lock(&log_mutex);
size_t fslen = 24 + strlen(fmt);
fs = malloc(fslen);
#ifdef _WIN32
SYSTEMTIME lt;
GetLocalTime(<);
snprintf(fs, 24, "%02d:%02d:%02d.%03d", lt.wHour, lt.wMinute, lt.wSecond, lt.wMilliseconds);
#else
struct timeval ts;
struct tm *tp;
gettimeofday(&ts, NULL);
#ifdef HAVE_LOCALTIME_R
struct tm tp_;
tp = localtime_r(&ts.tv_sec, &tp_);
#else
tp = localtime(&ts.tv_sec);
#endif
strftime(fs, 9, "%H:%M:%S", tp);
snprintf(fs+8, fslen-8, ".%03d %s %s", (int)(ts.tv_usec / 1000), _level_label[level], fmt);
#endif
va_start(ap, fmt);
va_copy(ap2, ap);
if (print_func) {
if (stderr_enabled) {
vfprintf(stderr, fs, ap);
fflush(stderr);
}
if (level <= print_level) {
// skip the timestamp and log level string
print_func(level, fs+23, ap2);
}
} else {
vprintf(fs, ap);
}
va_end(ap);
va_end(ap2);
free(fs);
mutex_unlock(&log_mutex);
}
#if defined(__GNUC__) || defined(__clang__)
static void print_funcf(enum loglevel level, const char* fmt, ...) __attribute__ ((format (printf, 2, 3)));
#else
static void print_funcf(enum loglevel level, const char* fmt, ...);
#endif
static void print_funcf(enum loglevel level, const char* fmt, ...)
{
va_list ap;
va_start(ap, fmt);
print_func(level, fmt, ap);
va_end(ap);
}
void logger_dump_hex(enum loglevel level, const void* buf, size_t len)
{
char *fs;
if (level > log_level)
return;
mutex_lock(&log_mutex);
fs = (char*)malloc(len * 3 + 1);
for (unsigned int i = 0; i < len; i++) {
snprintf(fs + i*3, 4, "%02x%c", ((unsigned char*)buf)[i], (i < len-1) ? ' ' : '\n');
}
if (print_func) {
if (stderr_enabled) {
fprintf(stderr, "%s", fs);
fflush(stderr);
}
if (level <= print_level) {
print_funcf(level, "%s", fs);
}
} else {
printf("%s", fs);
}
free(fs);
mutex_unlock(&log_mutex);
}
void logger_dump_plist(enum loglevel level, plist_t plist, int human_readable)
{
if (level > log_level)
return;
mutex_lock(&log_mutex);
plist_write_to_stream(plist, stderr_enabled ? stderr : stdout, (human_readable) ? PLIST_FORMAT_PRINT : PLIST_FORMAT_XML, PLIST_OPT_NONE);
mutex_unlock(&log_mutex);
}
int logger_set_logfile(const char* path)
{
if (!path || !strcasecmp(path, "NULL") || !strcasecmp(path, "NONE")) {
stderr_enabled = 0;
return 0;
}
stderr_enabled = 1;
if (strcmp(path, "-")) {
FILE* newf = freopen(path, "w", stderr);
if (!newf) {
logger(LL_ERROR, "Could not open logfile '%s': %s\n", path, strerror(errno));
return -1;
}
}
return 0;
}
void logger_set_print_func(logger_print_func func)
{
print_func = func;
}
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