From a38ca01fb692688a3579630649fe43162df5990f Mon Sep 17 00:00:00 2001
From: Hugo Villeneuve <hugo@hugovil.com>
Date: Wed, 9 Oct 2013 22:29:04 -0400
Subject: [PATCH] Add debug log functions

---
 src/Makefile.am |   1 +
 src/common.h    |   2 +
 src/log.c       | 120 ++++++++++++++++++++++++++++++++++++++++++++++++
 src/log.h       |  48 +++++++++++++++++++
 4 files changed, 171 insertions(+)
 create mode 100644 src/log.c
 create mode 100644 src/log.h

diff --git a/src/Makefile.am b/src/Makefile.am
index c980442..05c56da 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -17,6 +17,7 @@ common_SOURCES = \
 	instructions_8051.c \
 	options.c \
 	options.h \
+	log.c log.h \
 	app-config.c app-config.h \
 	hexfile.c \
 	hexfile.h \
diff --git a/src/common.h b/src/common.h
index 2fa6dcc..51a8c1c 100644
--- a/src/common.h
+++ b/src/common.h
@@ -35,6 +35,8 @@
 #  include <strings.h>
 #endif
 
+#include "log.h"
+
 #define FIXED_FONT "monospace 12"
 
 #define MAX_FILENAME_LENGTH 1024
diff --git a/src/log.c b/src/log.c
new file mode 100644
index 0000000..2810390
--- /dev/null
+++ b/src/log.c
@@ -0,0 +1,120 @@
+/*
+ * log.c -- debug functions for logging.
+ *
+ * Copyright (C) 2011 Hugo Villeneuve <hugo@hugovil.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.
+ */
+
+#include "config.h"
+
+#include <unistd.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdarg.h>
+#include <string.h>
+
+#include "common.h"
+#include "options.h"
+
+static int log_level = LOG_LEVEL_ERR; /* LEVEL = ERROR */
+
+void
+log_set_level(int new_log_level)
+{
+	log_level = new_log_level;
+}
+
+void
+log_debug(const char *format, ...)
+{
+	FILE *stream = stdout;
+
+	if (log_level >= LOG_LEVEL_DEBUG) {
+		va_list ap;
+
+		/* Printing the name of the program first. */
+		fprintf(stream, "%s debug  : ", PACKAGE_NAME);
+
+		va_start(ap, format);
+		vfprintf(stream, format, ap);
+		va_end(ap);
+
+		fprintf(stream, "\n");
+	}
+}
+
+void
+log_info(const char *format, ...)
+{
+	FILE *stream = stdout;
+
+	if (log_level >= LOG_LEVEL_INFO) {
+		va_list ap;
+
+		/* Printing the name of the program first. */
+		fprintf(stream, "%s info   : ", PACKAGE_NAME);
+
+		va_start(ap, format);
+		vfprintf(stream, format, ap);
+		va_end(ap);
+
+		fprintf(stream, "\n");
+	}
+}
+
+void
+log_warn(const char *format, ...)
+{
+	FILE *stream = stderr;
+
+	if (log_level >= LOG_LEVEL_WARN) {
+		va_list ap;
+
+		/* Printing the name of the program first. */
+		fprintf(stream, "%s warning: ", PACKAGE_NAME);
+
+		va_start(ap, format);
+		vfprintf(stream, format, ap);
+		va_end(ap);
+
+		fprintf(stream, "\n");
+	}
+}
+
+void
+log_fail(const char *format, ...)
+{
+	FILE *stream = stderr;
+	va_list ap;
+
+	/* Printing the name of the program first. */
+	fprintf(stream, "%s error  : ", PACKAGE_NAME);
+
+	va_start(ap, format);
+	vfprintf(stream, format, ap);
+	va_end(ap);
+
+	fprintf(stream, "\n");
+
+	exit(EXIT_FAILURE);
+}
+
+void
+log_fail_no_exit(const char *format, ...)
+{
+	FILE *stream = stderr;
+	va_list ap;
+
+	/* Printing the name of the program first. */
+	fprintf(stream, "%s error: ", PACKAGE_NAME);
+
+	va_start(ap, format);
+	vfprintf(stream, format, ap);
+	va_end(ap);
+
+	fprintf(stream, "\n");
+}
diff --git a/src/log.h b/src/log.h
new file mode 100644
index 0000000..f305797
--- /dev/null
+++ b/src/log.h
@@ -0,0 +1,48 @@
+/*
+ * log.h
+ *
+ * Copyright (C) 2011 Hugo Villeneuve <hugo@hugovil.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.
+ */
+
+#ifndef LOG_H
+#define LOG_H 1
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <errno.h>
+#include <string.h>
+
+#include "common.h"
+
+enum LOG_LEVEL {
+	LOG_LEVEL_ERR,
+	LOG_LEVEL_WARN,
+	LOG_LEVEL_INFO,
+	LOG_LEVEL_DEBUG
+};
+
+void
+log_set_level(int new_log_level);
+
+void
+log_debug(const char *format, ...);
+
+void
+log_info(const char *format, ...);
+
+void
+log_warn(const char *format, ...);
+
+void
+log_fail(const char *format, ...);
+
+void
+log_fail_no_exit(const char *format, ...);
+
+#endif /* LOG_H */
-- 
2.20.1