From 96fe104e6b1c1452a8408bb46baa73d2b93bcf0e Mon Sep 17 00:00:00 2001
From: Jonas Gunz <himself@jonasgunz.de>
Date: Wed, 2 Sep 2020 17:29:51 +0200
Subject: bitmap_strerror: More verbose bitmap failures

---
 src/bitmap.c | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

(limited to 'src/bitmap.c')

diff --git a/src/bitmap.c b/src/bitmap.c
index 6d72cb0..31256e8 100644
--- a/src/bitmap.c
+++ b/src/bitmap.c
@@ -6,6 +6,15 @@
 
 #include "bitmap.h"
 
+static const int   bitmap_errors_cnt = 5;
+static const char* bitmap_errors[] = {
+	"OK.",
+	"Error opening file.", // Use errno instead
+	"Invalid or corrupted file.",
+	"Unsupported bit depth.",
+	"Compression not supported."
+};
+
 static struct bitmap_file_header bitmap_read_file_header(FILE *_file);
 
 static struct bitmap_image bitmap_read_pixel_data(FILE *_file, struct bitmap_file_header _header);
@@ -265,3 +274,10 @@ static uint8_t bitmap_rgb_luminance(uint8_t R, uint8_t G, uint8_t B) {
 
 	return ret;
 }
+
+char* bitmap_strerror( int _error ) {
+	if ( _error >= bitmap_errors_cnt || _error < 0)
+		return "Unknown Error.";
+
+	return (char*) bitmap_errors[_error];
+}
-- 
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