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diffcore-delta.c: Ignore CR in CRLF for text files

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This ignores CR byte in CRLF sequence in text file when
computing similarity of two blobs.

Usually this should not matter as nobody sane would be checking
in a file with CRLF line endings to the repository (they would
use autocrlf so that the repository copy would have LF line
endings).

Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Junio C Hamano 2007-06-28 23:14:13 -07:00
parent af3abef94a
commit b9905fed7a
2 changed files with 44 additions and 3 deletions
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14
diffcore-delta.c
View File

@ -122,11 +122,14 @@ static struct spanhash_top *add_spanhash(struct spanhash_top *top,
}
}
static struct spanhash_top *hash_chars(unsigned char *buf, unsigned int sz)
static struct spanhash_top *hash_chars(struct diff_filespec *one)
{
int i, n;
unsigned int accum1, accum2, hashval;
struct spanhash_top *hash;
unsigned char *buf = one->data;
unsigned int sz = one->size;
int is_text = !one->is_binary;
i = INITIAL_HASH_SIZE;
hash = xmalloc(sizeof(*hash) + sizeof(struct spanhash) * (1<<i));
@ -140,6 +143,11 @@ static struct spanhash_top *hash_chars(unsigned char *buf, unsigned int sz)
unsigned int c = *buf++;
unsigned int old_1 = accum1;
sz--;
/* Ignore CR in CRLF sequence if text */
if (is_text && c == '\r' && sz && *buf == '\n')
continue;
accum1 = (accum1 << 7) ^ (accum2 >> 25);
accum2 = (accum2 << 7) ^ (old_1 >> 25);
accum1 += c;
@ -169,14 +177,14 @@ int diffcore_count_changes(struct diff_filespec *src,
if (src_count_p)
src_count = *src_count_p;
if (!src_count) {
src_count = hash_chars(src->data, src->size);
src_count = hash_chars(src);
if (src_count_p)
*src_count_p = src_count;
}
if (dst_count_p)
dst_count = *dst_count_p;
if (!dst_count) {
dst_count = hash_chars(dst->data, dst->size);
dst_count = hash_chars(dst);
if (dst_count_p)
*dst_count_p = dst_count;
}

33
t/t0022-crlf-rename.sh Executable file
View File

@ -0,0 +1,33 @@
#!/bin/sh
test_description='ignore CR in CRLF sequence while computing similiarity'
. ./test-lib.sh
test_expect_success setup '
cat ../t0022-crlf-rename.sh >sample &&
git add sample &&
test_tick &&
git commit -m Initial &&
sed -e "s/\$/ /" ../t0022-crlf-rename.sh >elpmas &&
git add elpmas &&
rm -f sample &&
test_tick &&
git commit -a -m Second
'
test_expect_success 'diff -M' '
git diff-tree -M -r --name-status HEAD^ HEAD |
sed -e "s/R[0-9]*/RNUM/" >actual &&
echo "RNUM sample elpmas" >expect &&
diff -u expect actual
'
test_done