logger.c

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/***************************************************************************
 *            logger.c
 *
 *  Fri Aug 24 09:51:29 2007
 *  Copyright  2007  hunbuso
 *  [e-mail]
 ****************************************************************************/

#include "main.h"
#include "logger.h"

#define LOG_ALL_LEVELS \
    (G_LOG_LEVEL_MASK | G_LOG_FLAG_FATAL | G_LOG_FLAG_RECURSION)

typedef struct _LogHandler {
    gchar *domain;
    GLogLevelFlags level;
    guint id;
} LogHandler;

static LogHandler log_handlers[] = {
    {NULL, LOG_ALL_LEVELS},
    {"Glib", LOG_ALL_LEVELS},
    {"Gtk", LOG_ALL_LEVELS}
};

static guint log_handler_count = G_N_ELEMENTS(log_handlers);

static FILE *proxyfish_log_file = NULL;

G_LOCK_DEFINE_STATIC(proxyfish_log_file);

static const gchar *
get_timestamp_str(void)
{
    time_t current_time = time(NULL);
    return ctime(&current_time);
}

static size_t
get_filesize(const gchar *filename)
{
    struct stat info;

    if (stat(filename, &info))
        return 0;

    return info.st_size;
}

static void
log_to_file(const gchar * domain, GLogLevelFlags level,
            const gchar * message, gpointer data)
{
    FILE *file = (FILE *) data;

    g_return_if_fail(file != NULL);
    g_return_if_fail(message != NULL);

    G_LOCK(proxyfish_log_file);

    if (domain)
        g_fprintf(file, "(%s) ", domain);

    g_fprintf(file, "%s\n", message);
    fflush(file);

    G_UNLOCK(proxyfish_log_file);
}

gboolean
proxyfish_logger_start(const gchar * filename)
{
    guint i;

    g_return_val_if_fail(filename != NULL, FALSE);

    /* 如果文件大于最大值则剪切 */
    if (get_filesize(filename) < PROXYFISH_LOGGER_FILE_MAX_SIZE)
        proxyfish_log_file = fopen(filename, "at");
    else
        proxyfish_log_file = fopen(filename, "w+t");

    if (!proxyfish_log_file) {
        g_printerr(_("Unable to create log file (%s)!\n"), filename);
        return FALSE;
    }

    for (i = 0; i < log_handler_count; i++) {
        log_handlers[i].id = g_log_set_handler(log_handlers[i].domain,
                                               log_handlers[i].level,
                                               log_to_file, proxyfish_log_file);
    }

    g_message("\n** LOGGING STARTED AT %s", get_timestamp_str());

    return TRUE;
}

void
proxyfish_logger_stop(void)
{
    guint i;

    if (!proxyfish_log_file)
        return;

    g_message("\n** LOGGING STOPPED AT %s", get_timestamp_str());

    for (i = 0; i < log_handler_count; i++)
        g_log_remove_handler(log_handlers[i].domain, log_handlers[i].id);

    fclose(proxyfish_log_file);
    proxyfish_log_file = NULL;
}