From f0351693ac1558505cf15c61c3ea4a1f12c3d67b Mon Sep 17 00:00:00 2001
From: Patrick McDermott <patrick.mcdermott@libiquity.com>
Date: Thu, 18 Jul 2019 02:37:53 -0400
Subject: text_*(), font_*(), sgr(): Convert to unsigned char

---
diff --git a/src/font.c b/src/font.c
index 92988a3..c351857 100644
--- a/src/font.c
+++ b/src/font.c
@@ -78,7 +78,7 @@ font_get_height(struct font *font)
 
 void
 font_render(struct font *font, png_const_colorp fg, png_const_colorp bg,
-		char ch, png_bytepp rows, int row, int col)
+		unsigned char ch, png_bytepp rows, int row, int col)
 {
 	size_t        y;
 	size_t        r;
diff --git a/src/font.h b/src/font.h
index ee3942e..f82f2a0 100644
--- a/src/font.h
+++ b/src/font.h
@@ -37,6 +37,6 @@ font_get_height(struct font *font) __attribute__((pure));
 
 void
 font_render(struct font *font, png_const_colorp fg, png_const_colorp bg,
-		char ch, png_bytepp rows, int row, int col);
+		unsigned char ch, png_bytepp rows, int row, int col);
 
 #endif  /* FONT_H_ */
diff --git a/src/sgr.c b/src/sgr.c
index 9e77f18..9faa117 100644
--- a/src/sgr.c
+++ b/src/sgr.c
@@ -48,11 +48,11 @@ static png_color _4bit[] = {
 /* TODO: Add 8-bit and 24-bit modes. */
 
 void
-sgr(char *param, png_colorp fg, png_colorp bg)
+sgr(unsigned char *param, png_colorp fg, png_colorp bg)
 {
-	int   end;
-	char *p;
-	int   i;
+	int            end;
+	unsigned char *p;
+	int            i;
 
 	end = 0;
 	for (p = param; param; ++param) {
@@ -62,7 +62,7 @@ sgr(char *param, png_colorp fg, png_colorp bg)
 			}
 			*param = '\0';
 			if (*p) {
-				i = atoi(p);
+				i = atoi((char *) p);
 			} else {
 				i = 0;
 			}
diff --git a/src/sgr.h b/src/sgr.h
index 3b2362e..6f5346a 100644
--- a/src/sgr.h
+++ b/src/sgr.h
@@ -25,6 +25,6 @@
 #include <png.h>
 
 void
-sgr(char *param, png_colorp fg, png_colorp bg);
+sgr(unsigned char *param, png_colorp fg, png_colorp bg);
 
 #endif  /* SGR_H_ */
diff --git a/src/text.c b/src/text.c
index dda6de1..fedbd3f 100644
--- a/src/text.c
+++ b/src/text.c
@@ -33,15 +33,15 @@
 #define MAX(a, b) (((a) > (b)) ? (a) : (b))
 
 struct text {
-	size_t  size;
-	size_t  read;
-	char   *string;
-	size_t  width;
-	size_t  height;
+	size_t         size;
+	size_t         read;
+	unsigned char *string;
+	size_t         width;
+	size_t         height;
 };
 
-static char
-_getc(struct text *text, FILE *stream, char *c)
+static unsigned char
+_getc(struct text *text, FILE *stream, unsigned char *c)
 {
 	int i_c;
 
@@ -60,10 +60,10 @@ _getc(struct text *text, FILE *stream, char *c)
 struct text *
 text_new(FILE *stream)
 {
-	struct text *text;
-	size_t       width;
-	int          eol;
-	char         c;
+	struct text   *text;
+	size_t         width;
+	int            eol;
+	unsigned char  c;
 
 	if (!stream) {
 		return NULL;
@@ -131,19 +131,20 @@ text_set_height(struct text *text, size_t height)
 void
 text_render(struct text *text, struct font *font, png_bytepp rows)
 {
-	char      *string_start;
-	char      *string;
-	size_t     row;
-	size_t     col;
-	char      *parameter;
+	unsigned char *string_start;
+	unsigned char *string;
+	size_t         row;
+	size_t         col;
+	unsigned char *parameter;
 	png_color  fg = {170, 170, 170};
 	png_color  bg = {  0,   0,   0};
 
-	string_start = calloc(strlen(text->string) + 1, sizeof(*text->string));
+	string_start = calloc(strlen((char *) text->string) + 1,
+			sizeof(*text->string));
 	if (!string_start) {
 		return;
 	}
-	memcpy(string_start, text->string, strlen(text->string) + 1);
+	memcpy(string_start, text->string, strlen((char *) text->string) + 1);
 
 	string = string_start;
 	row = 0;
--
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