diag: Unify diagnostic formatting

This adds a bfs: prefix to error/warning messages for consistency with
other command line tools, and leaves only the "error:"/"warning:" part
colored like GCC.  It also uniformly adds full stops after messages.

1 files changed, 53 insertions, 0 deletions

diff --git a/diag.h b/diag.h
new file mode 100644
index 0000000..24ee92a
--- /dev/null
+++ b/diag.h
@@ -0,0 +1,53 @@
+/****************************************************************************
+ * bfs                                                                      *
+ * Copyright (C) 2019 Tavian Barnes <tavianator@tavianator.com>             *
+ *                                                                          *
+ * Permission to use, copy, modify, and/or distribute this software for any *
+ * purpose with or without fee is hereby granted.                           *
+ *                                                                          *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES *
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF         *
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR  *
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES   *
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN    *
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF  *
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.           *
+ ****************************************************************************/
+
+#ifndef BFS_DIAG_H
+#define BFS_DIAG_H
+
+#include "cmdline.h"
+#include <stdarg.h>
+
+/**
+ * Shorthand for printing error messages.
+ */
+void bfs_error(const struct cmdline *cmdline, const char *format, ...);
+
+/**
+ * Shorthand for printing warning messages.
+ */
+void bfs_warning(const struct cmdline *cmdline, const char *format, ...);
+
+/**
+ * bfs_error() variant that takes a va_list.
+ */
+void bfs_verror(const struct cmdline *cmdline, const char *format, va_list args);
+
+/**
+ * bfs_warning() variant that takes a va_list.
+ */
+void bfs_vwarning(const struct cmdline *cmdline, const char *format, va_list args);
+
+/**
+ * Print the error message prefix.
+ */
+void bfs_error_prefix(const struct cmdline *cmdline);
+
+/**
+ * Print the warning message prefix.
+ */
+void bfs_warning_prefix(const struct cmdline *cmdline);
+
+#endif // BFS_DIAG_H