From bb4f0971acc3dba285c8dcddd0b62f210639f687 Mon Sep 17 00:00:00 2001
From: "B. Watson" <urchlay@slackware.uk>
Date: Fri, 28 Feb 2025 15:06:22 -0500
Subject: listamsb: don't print a closing " if there isn't one.

---
 listamsb.c | 32 ++++++++++++++++++--------------
 1 file changed, 18 insertions(+), 14 deletions(-)

(limited to 'listamsb.c')

diff --git a/listamsb.c b/listamsb.c
index eda6d9d..5558e63 100644
--- a/listamsb.c
+++ b/listamsb.c
@@ -316,25 +316,24 @@ int next_line(void) {
 		byte = read_prog_byte();
 
 		if(in_string) {
-			if(byte == 0x00 || byte == '|') {
-				/* end of string */
+			/* null byte ends both the string and the line of code.
+			   don't print a closing quote because AMSB doesn't. */
+			if(byte == 0x00) break;
+			if (byte == '|') {
+				/* pipe is how AMSB stores the closing quote. end the string
+				   but not the line of code, and print a " character. */
 				in_string = 0;
 				if(printing) putc('"', outfile);
-
-				/* if we read a null, that means the line ends with a string
-					that's missing its closing double-quote. */
-				if(byte == 0x00) {
-					break;
-				} else {
-					continue;
+			} else {
+				/* normal string character. */
+				if(printing) {
+					putc(byte, outfile);
+					/* one " character embedded in a string gets printed as "" */
+					if(byte == '"') putc(byte, outfile);
 				}
 			}
-			if(printing) {
-				putc(byte, outfile);
-				/* one " character embedded in a string gets printed as "" */
-				if(byte == '"') putc(byte, outfile);
-			}
 		} else if(in_comment) {
+			/* null byte ends both the comment and the line of code. */
 			if(byte == 0x00) break;
 			if(printing) putc(byte, outfile);
 		} else if(byte == ':') {
@@ -348,6 +347,7 @@ int next_line(void) {
 			in_string = 1;
 			if(printing) putc(byte, outfile);
 		} else if(was_ff) {
+			/* previous token was $ff, so this is a function token */
 			if(byte >= MIN_EXT_TOK && byte <= MAX_EXT_TOK) {
 				if(printing) fputs(ext_tokens[byte - MIN_EXT_TOK], outfile);
 			} else {
@@ -356,15 +356,19 @@ int next_line(void) {
 			}
 			was_ff = 0;
 		} else if(byte == 0xff) {
+			/* next token will be a function token */
 			was_ff = 1;
 		} else if(byte >= MIN_STD_TOK && byte <= MAX_STD_TOK) {
+			/* statement token */
 			if(printing) fputs(std_tokens[byte - MIN_STD_TOK], outfile);
 			if(byte == TOK_SQUOTE || byte == TOK_BANG || byte == TOK_REM)
 				in_comment = 1;
 		} else if(byte >= 0x80) {
+			/* invalid token */
 			if(printing) unknown_token(byte, 0);
 			warnings++;
 		} else {
+			/* null byte means the line of code is done */
 			if(!byte) break;
 			if(byte < 0x20) {
 				/* ATASCII graphics outside of a string */
-- 
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