From 78ed710fcf1a67a40eeca1be1a1bb8e8b7296177 Mon Sep 17 00:00:00 2001 From: Junio C Hamano Date: Sun, 23 Aug 2009 00:51:09 -0700 Subject: [PATCH] xutils: Fix hashing an incomplete line with whitespaces at the end Upon seeing a whitespace, xdl_hash_record_with_whitespace() first skipped the run of whitespaces (excluding LF) that begins there, ensuring that the pointer points at the last whitespace character in the run, and assumed that the next character must be LF at the end of the line. This does not work when hashing an incomplete line, which lacks the LF at the end. Introduce "at_eol" variable that is true when either we are at the end of line (looking at LF) or at the end of an incomplete line, and use that instead throughout the code. Noticed by Thell Fowler. Signed-off-by: Junio C Hamano --- xdiff/xutils.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/xdiff/xutils.c b/xdiff/xutils.c index 04ad468702..9411fa96a1 100644 --- a/xdiff/xutils.c +++ b/xdiff/xutils.c @@ -242,18 +242,20 @@ static unsigned long xdl_hash_record_with_whitespace(char const **data, for (; ptr < top && *ptr != '\n'; ptr++) { if (isspace(*ptr)) { const char *ptr2 = ptr; + int at_eol; while (ptr + 1 < top && isspace(ptr[1]) && ptr[1] != '\n') ptr++; + at_eol = (top <= ptr + 1 || ptr[1] == '\n'); if (flags & XDF_IGNORE_WHITESPACE) ; /* already handled */ else if (flags & XDF_IGNORE_WHITESPACE_CHANGE - && ptr[1] != '\n') { + && !at_eol) { ha += (ha << 5); ha ^= (unsigned long) ' '; } else if (flags & XDF_IGNORE_WHITESPACE_AT_EOL - && ptr[1] != '\n') { + && !at_eol) { while (ptr2 != ptr + 1) { ha += (ha << 5); ha ^= (unsigned long) *ptr2;