common: Add basic (janky) logging system

Signed-off-by: Ikey Doherty <ikey@solus-project.com>

src/common/log.c

@@ -0,0 +1,109 @@
+/*
+ * This file is part of linux-steam-integration.
+ *
+ * Copyright © 2016-2017 Ikey Doherty <ikey@solus-project.com>
+ *
+ * linux-steam-integration 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.
+ */
+
+#define _GNU_SOURCE
+
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "log.h"
+#include "nica/util.h"
+
+void lsi_log_debug(const char *format, ...)
+{
+        if (!getenv("LSI_DEBUG")) {
+                return;
+        }
+
+        autofree(char) *p = NULL;
+        va_list va;
+        va_start(va, format);
+
+        if (!vasprintf(&p, format, va)) {
+                /* At least print *something */
+                fprintf(stderr, "%s\n", format);
+                goto end;
+        }
+
+        fprintf(stderr, "\033[32;1m[lsi:debug]\033[0m: %s\n", p);
+
+end:
+        va_end(va);
+}
+
+void lsi_log_info(const char *format, ...)
+{
+        autofree(char) *p = NULL;
+        va_list va;
+        va_start(va, format);
+
+        if (!vasprintf(&p, format, va)) {
+                /* At least print *something */
+                fprintf(stderr, "%s\n", format);
+                goto end;
+        }
+
+        fprintf(stderr, "\034[32;1m[lsi:info]\033[0m: %s\n", p);
+
+end:
+        va_end(va);
+}
+
+void lsi_log_warn(const char *format, ...)
+{
+        autofree(char) *p = NULL;
+        va_list va;
+        va_start(va, format);
+
+        if (!vasprintf(&p, format, va)) {
+                /* At least print *something */
+                fprintf(stderr, "%s\n", format);
+                goto end;
+        }
+
+        fprintf(stderr, "\033[33;1m[lsi:warn]\033[0m: %s\n", p);
+
+end:
+        va_end(va);
+}
+
+void lsi_log_error(const char *format, ...)
+{
+        autofree(char) *p = NULL;
+        va_list va;
+        va_start(va, format);
+
+        if (!vasprintf(&p, format, va)) {
+                /* At least print *something */
+                fprintf(stderr, "%s\n", format);
+                goto end;
+        }
+
+        fprintf(stderr, "\033[31;1m[lsi:error]\033[0m: %s\n", p);
+
+end:
+        va_end(va);
+}
+
+/*
+ * Editor modelines  -  https://www.wireshark.org/tools/modelines.html
+ *
+ * Local variables:
+ * c-basic-offset: 8
+ * tab-width: 8
+ * indent-tabs-mode: nil
+ * End:
+ *
+ * vi: set shiftwidth=8 tabstop=8 expandtab:
+ * :indentSize=8:tabSize=8:noTabs=true:
+ */

src/common/log.h

@@ -0,0 +1,49 @@
+/*
+ * This file is part of linux-steam-integration.
+ *
+ * Copyright © 2016-2017 Ikey Doherty <ikey@solus-project.com>
+ *
+ * linux-steam-integration 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.
+ */
+
+#pragma once
+
+#define _GNU_SOURCE
+
+#include <stdlib.h>
+
+/**
+ * Emit some debug information if LSI_DEBUG is set
+ */
+void lsi_log_debug(const char *format, ...) __attribute__((format(printf, 1, 2)));
+
+/**
+ * Emit information, always shown
+ */
+void lsi_log_info(const char *format, ...) __attribute__((format(printf, 1, 2)));
+
+/**
+ * Emit a warning, always shown
+ */
+void lsi_log_warn(const char *format, ...) __attribute__((format(printf, 1, 2)));
+
+/**
+ * Emit an error, always shown
+ */
+void lsi_log_error(const char *format, ...) __attribute__((format(printf, 1, 2)));
+
+/*
+ * Editor modelines  -  https://www.wireshark.org/tools/modelines.html
+ *
+ * Local variables:
+ * c-basic-offset: 8
+ * tab-width: 8
+ * indent-tabs-mode: nil
+ * End:
+ *
+ * vi: set shiftwidth=8 tabstop=8 expandtab:
+ * :indentSize=8:tabSize=8:noTabs=true:
+ */

src/common/meson.build

@@ -2,6 +2,7 @@
 
 lsi_common_sources = [
     'files.c',
+    'log.c',
 ]
 
 lib_lsi_common = static_library(