1 files changed, 118 insertions, 0 deletions
diff --git a/any_log.h b/any_log.h
new file mode 100644
index 0000000..63461f1
--- /dev/null
+++ b/any_log.h
@@ -0,0 +1,118 @@
+#ifndef ANY_LOG_INCLUDE
+#define ANY_LOG_INCLUDE
+
+typedef enum {
+    LOG_PANIC,
+    LOG_ERROR,
+    LOG_WARN,
+    LOG_INFO,
+    LOG_DEBUG,
+    LOG_TRACE,
+    LOG_ALL,
+} log_level_t;
+
+// The value of ANY_LOG_MODULE is used to indicate the current module.
+// By default it is defined as __FILE__, so that it will coincide with the
+// source file path (relative to the compiler cwd).
+//
+// You can customize ANY_LOG_MODULE before including the header by simply
+// defining it. For example
+//
+//    #define ANY_LOG_MODULE "my-library"
+//    #include "any_log.h"
+//
+#ifndef ANY_LOG_MODULE
+#define ANY_LOG_MODULE __FILE__
+#endif
+
+// C99 and later define the __func__ variable
+#ifndef ANY_LOG_FUNC
+#define ANY_LOG_FUNC __func__
+#endif
+
+#define log_panic(...) \
+    do { \
+        log_generic(LOG_PANIC, ANY_LOG_MODULE, ANY_LOG_FUNC, __VA_ARGS__); \
+        log_exit(ANY_LOG_MODULE, ANY_LOG_FUNC); \
+    } while (0)
+
+#define log_error(...) \
+    log_generic(LOG_ERROR, ANY_LOG_MODULE, ANY_LOG_FUNC, __VA_ARGS__)
+
+#define log_warn(...)  \
+    log_generic(LOG_WARN, ANY_LOG_MODULE, ANY_LOG_FUNC, __VA_ARGS__)
+
+#define log_info(...)  \
+    log_generic(LOG_INFO, ANY_LOG_MODULE, ANY_LOG_FUNC, __VA_ARGS__)
+
+#define log_debug(...) \
+    log_generic(LOG_DEBUG, ANY_LOG_MODULE, ANY_LOG_FUNC, __VA_ARGS__)
+
+#ifdef ANY_LOG_NO_TRACE
+#define log_trace(...)
+#else
+#define log_trace(...) \
+    log_generic(LOG_TRACE, ANY_LOG_MODULE, ANY_LOG_FUNC, __VA_ARGS__)
+#endif
+
+void log_exit(const char *module, const char *func);
+
+void log_generic(log_level_t level, const char *module,
+                 const char *func, const char *format, ...);
+
+
+#endif
+
+#ifdef ANY_LOG_IMPLEMENT
+
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+// Using log_panic results in a call to log_exit, which should terminate
+// the program. The value of ANY_LOG_PANIC is used to specify what action
+// to take in log_exit.
+// By default it is abort
+//
+// NOTE: That log_exit should never return!
+//
+#ifndef ANY_LOG_PANIC
+#define ANY_LOG_PANIC(module, func) abort()
+#endif
+
+// NOTE: This function should be called solely by the macro log_panic
+void log_exit(const char *module, const char *func)
+{
+    ANY_LOG_PANIC(module, func);
+}
+
+#ifndef ANY_LOG_FORMAT_BEFORE
+#define ANY_LOG_FORMAT_BEFORE(level, module, func, levels) \
+    "[%s %s] %s: ", module, func, levels[level]
+#endif
+
+#ifndef ANY_LOG_FORMAT_AFTER
+#define ANY_LOG_FORMAT_AFTER(level, module, func, levels) "\n"
+#endif
+
+void log_generic(log_level_t level, const char *module,
+		         const char *func, const char *format, ...)
+{
+	const char *log_levels[] = {
+		"panic", "error", "warn",
+		"info", "debug", "trace",
+	};
+
+	fprintf(stdout, ANY_LOG_FORMAT_BEFORE(level, module, func, log_levels));
+
+    va_list args;
+    va_start(args, format);
+    vfprintf(stdout, format, args);
+    va_end(args);
+
+	fprintf(stdout, ANY_LOG_FORMAT_AFTER(level, module, func, log_levels));
+}
+
+#endif
+
+// vim: ts=4 sw=4 et