Subject: [PATCH 2/2] conversion of lonely cr chars in autocrlf

From: Heiko Voigt <[email-masked]>
Date: Wed, 6 May 2009 17:10:18 +0200

This is was marked as crazy stuff but certainly done by our
developers in an 10 year old rcs like repository

Signed-off-by: Heiko Voigt <[email-masked]>
---
This belongs to an conversion effort of quite matured repositories. I
do not know how many programs still write CR's as their line endings but
there certainly are/were some.

Anybody interested in that crazy stuff?

 convert.c |   27 +++++++++++++--------------
 1 files changed, 13 insertions(+), 14 deletions(-)

diff --git a/convert.c b/convert.c
index 0ced471..7164f09 100644
--- a/convert.c
+++ b/convert.c
@@ -133,14 +133,6 @@ static int crlf_to_git(const char *path, const char *src, size_t len,
 
 	if (action == CRLF_GUESS) {
 		/*
-		 * We're currently not going to even try to convert stuff
-		 * that has bare CR characters. Does anybody do that crazy
-		 * stuff?
-		 */
-		if (stats.cr != stats.crlf)
-			return 0;
-
-		/*
 		 * And add some heuristics for binary vs text, of course...
 		 */
 		if (is_binary(len, &stats))
@@ -158,15 +150,22 @@ static int crlf_to_git(const char *path, const char *src, size_t len,
 		strbuf_grow(buf, len - buf->len);
 	dst = buf->buf;
 	if (action == CRLF_GUESS) {
-		/*
-		 * If we guessed, we already know we rejected a file with
-		 * lone CR, and we can strip a CR without looking at what
-		 * follow it.
-		 */
 		do {
 			unsigned char c = *src++;
-			if (c != '\r')
+			if (c != '\r') {
+				/* if its not cr copy this char */
 				*dst++ = c;
+				continue;
+			}
+			if (c == '\r' && (1 < len && *src == '\n')) {
+				/* if its \r\n skip this char */
+				continue;
+			}
+			if (c == '\r' && !(1 < len && *src == '\n')) {
+				/* if its a lonely cr substitute it */
+				*dst++ = '\n';
+			}
+
 		} while (--len);
 	} else {
 		do {
-- 
1.6.2.1.423.g442d