1 files changed, 63 insertions, 0 deletions
diff --git a/src/log.h b/src/log.h
new file mode 100644
index 0000000..b615d34
--- /dev/null
+++ b/src/log.h
@@ -0,0 +1,63 @@
+// Copyright 2007-2022 David Robillard <d@drobilla.net>
+// SPDX-License-Identifier: ISC
+
+#ifndef JALV_LOG_H
+#define JALV_LOG_H
+
+#include "attributes.h"
+#include "urids.h"
+
+#include <lv2/log/log.h>
+#include <lv2/urid/urid.h>
+
+#include <stdarg.h>
+#include <stdbool.h>
+#include <stdio.h>
+
+#ifdef __GNUC__
+#  define JALV_LOG_FUNC(fmt, arg1) __attribute__((format(printf, fmt, arg1)))
+#else
+#  define JALV_LOG_FUNC(fmt, arg1)
+#endif
+
+// String and log utilities
+JALV_BEGIN_DECLS
+
+typedef enum {
+  JALV_LOG_ERR     = 3,
+  JALV_LOG_WARNING = 4,
+  JALV_LOG_INFO    = 6,
+  JALV_LOG_DEBUG   = 7,
+} JalvLogLevel;
+
+typedef struct {
+  JalvURIDs* urids;
+  bool       tracing;
+} JalvLog;
+
+/// Print a log message to stderr with a GCC-like prefix and color
+JALV_LOG_FUNC(2, 3)
+int
+jalv_log(JalvLogLevel level, const char* fmt, ...);
+
+/// LV2 log vprintf function
+JALV_LOG_FUNC(3, 0)
+int
+jalv_vprintf(LV2_Log_Handle handle, LV2_URID type, const char* fmt, va_list ap);
+
+/// LV2 log printf function
+JALV_LOG_FUNC(3, 4)
+int
+jalv_printf(LV2_Log_Handle handle, LV2_URID type, const char* fmt, ...);
+
+/// Write an ANSI escape sequence to set the foreground color
+bool
+jalv_ansi_start(FILE* stream, int color);
+
+/// Write an ANSI escape sequence to reset the foreground color
+void
+jalv_ansi_reset(FILE* stream);
+
+JALV_END_DECLS
+
+#endif // JALV_LOG_H