include *.h files only once

1 files changed, 5 insertions, 0 deletions

diff --git a/fonts.h b/fonts.h
index bb70309..f69db46 100644
--- a/fonts.h
+++ b/fonts.h
@@ -1,3 +1,6 @@
+#ifndef FONTS_H
+#define FONTS_H
+
 #include <uchar.h>
 
 #define MAX_SYMBOL_WIDTH   6
@@ -136,3 +139,5 @@ static int symbols_boundaries[SYMBOL_COUNT][2];
 
 void init_symbols_boundaries();
 int render(char *input, int input_len, char *output, int max_output_len, int skip_unprintables);
+
+#endif // FONTS_H