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[prss.git] / src / log.c

diff --git a/src/log.c b/src/log.c
new file mode 100644 (file)
index 0000000..3009e5d
--- /dev/null
+++ b/src/log.c
@@ -0,0 +1,156 @@
+/*
+ * Copyright (C) 2010-2013 jeanfi@gmail.com
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program 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
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301 USA
+ */
+#include <locale.h>
+#include <libintl.h>
+#define _(str) gettext(str)
+
+#include <stdarg.h>
+#include <stdio.h>
+#include <sys/time.h>
+
+#include "log.h"
+
+static FILE *file;
+int log_level =  LOG_WARN;
+
+void log_open(const char *path)
+{
+       file = fopen(path, "a");
+
+       if (!file)
+               log_printf(LOG_ERR, _("Cannot open log file: %s"), path);
+}
+
+void log_close()
+{
+       if (!file)
+               return ;
+
+       fclose(file);
+
+       file = NULL;
+}
+
+
+#define LOG_BUFFER 128
+static void vlogf(int lvl, const char *fmt, va_list ap)
+{
+       struct timeval tv;
+       char buffer[1 + LOG_BUFFER];
+       char *lvl_str;
+       FILE *stdf;
+
+       if (lvl > LOG_INFO && (!file || lvl > log_level))
+               return ;
+
+       vsnprintf(buffer, LOG_BUFFER, fmt, ap);
+       buffer[LOG_BUFFER] = '\0';
+
+       if (gettimeofday(&tv, NULL) != 0)
+               timerclear(&tv);
+
+       switch (lvl) {
+       case LOG_WARN:
+               lvl_str = "[WARN]";
+               break;
+       case LOG_ERR:
+               lvl_str = "[ERR]";
+               break;
+       case LOG_DEBUG:
+               lvl_str = "[DEBUG]";
+               break;
+       case LOG_INFO:
+               lvl_str = "[INFO]";
+               break;
+       default:
+               lvl_str = "[??]";
+       }
+
+       if (file && lvl <= log_level) {
+               fprintf(file,
+                       "[%ld.%06ld] %s %s\n",
+                       tv.tv_sec,
+                       tv.tv_usec,
+                       lvl_str, 
+                       buffer);
+               fflush(file);
+       }
+
+       if (lvl <= LOG_INFO) {
+               if (lvl == LOG_WARN || lvl == LOG_ERR)
+                       stdf = stderr;
+               else
+                       stdf = stdout;
+
+               fprintf(stdf,
+                       "[%ld.%06ld] %s %s\n",
+                       tv.tv_sec,
+                       tv.tv_usec,
+                       lvl_str,
+                       buffer);
+       }
+}
+
+void log_printf(int lvl, const char *fmt, ...)
+{
+       va_list ap;
+
+       va_start(ap, fmt);
+       vlogf(lvl, fmt, ap);
+       va_end(ap);
+}
+
+void log_debug(const char *fmt, ...)
+{
+       va_list ap;
+
+       if (log_level < LOG_DEBUG)
+               return ;
+
+       va_start(ap, fmt);
+       vlogf(LOG_DEBUG, fmt, ap);
+       va_end(ap);
+}
+
+void log_err(const char *fmt, ...)
+{
+       va_list ap;
+
+       va_start(ap, fmt);
+       vlogf(LOG_ERR, fmt, ap);
+       va_end(ap);
+}
+
+void log_warn(const char *fmt, ...)
+{
+       va_list ap;
+
+       va_start(ap, fmt);
+       vlogf(LOG_WARN, fmt, ap);
+       va_end(ap);
+}
+
+void log_info(const char *fmt, ...)
+{
+       va_list ap;
+
+       va_start(ap, fmt);
+       vlogf(LOG_INFO, fmt, ap);
+       va_end(ap);
+}