a8xd: add -a (antic screencodes) option.

1 files changed, 14 insertions, 2 deletions

diff --git a/a8xd.c b/a8xd.c
index e543929..3871248 100644
--- a/a8xd.c
+++ b/a8xd.c
@@ -16,7 +16,7 @@ const char *byte_format = "%02x";
 
 int verbose = 0, color = 1, disp_offset = 0, maxlen = 0;
 int seek_whence = 0, seekpos = 0, filepos = 0, limit = 0;
-int graphics = 0;
+int graphics = 0, screencodes = 0;
 
 const char *self;
 
@@ -161,6 +161,16 @@ char *get_graphics(unsigned char c) {
 	return result;
 }
 
+unsigned char screen2ata(unsigned char c) {
+	unsigned char c7 = c & 0x7f;
+
+	if(c7 < 0x40)
+		return c + 0x20;
+	if(c7 >= 0x40 && c7 < 0x60)
+		return c - 0x40;
+	return c;
+}
+
 void fake_seek(FILE *input) {
 	char junkbuf[1024];
 	int pos = 0, chunksize;
@@ -212,6 +222,7 @@ void dump_line(const unsigned char *buf, int len) {
 
 	while(len) {
 		c = *buf;
+		if(screencodes) c = screen2ata(c);
 		inv = !graphics && (c & 0x80);
 
 		if(color) hpos += sprintf(hex + hpos, "%s", get_color(c));
@@ -283,7 +294,7 @@ int main(int argc, char **argv) {
 		exit(0);
 	}
 
-	while( (opt = getopt(argc, argv, "vhimus:o:l:g")) != -1) {
+	while( (opt = getopt(argc, argv, "vhimus:o:l:ga")) != -1) {
 		switch(opt) {
 			case 'v': verbose = 1; break;
 			case 'h': print_help(); exit(0); break;
@@ -294,6 +305,7 @@ int main(int argc, char **argv) {
 			case 'o': disp_offset = parse_offset_arg(optarg); break;
 			case 'l': limit = parse_limit_arg(optarg); break;
 			case 'g': graphics = 1; break;
+			case 'a': screencodes = 1; break;
 			default: print_help(); exit(1); break;
 		}
 	}