diff options
| -rw-r--r-- | diff.c | 16 | ||||
| -rw-r--r-- | diffcore-break.c | 3 | ||||
| -rw-r--r-- | diffcore-delta.c | 39 | ||||
| -rw-r--r-- | diffcore-rename.c | 3 | ||||
| -rw-r--r-- | diffcore.h | 5 | ||||
| -rwxr-xr-x | t/t0022-crlf-rename.sh | 33 |
6 files changed, 76 insertions, 23 deletions
@@ -3005,6 +3005,22 @@ void diffcore_std(struct diff_options *options) { if (options->quiet) return; + + /* + * break/rename count similarity differently depending on + * the binary-ness. + */ + if ((options->break_opt != -1) || (options->detect_rename)) { + struct diff_queue_struct *q = &diff_queued_diff; + int i; + + for (i = 0; i < q->nr; i++) { + struct diff_filepair *p = q->queue[i]; + p->one->is_binary = file_is_binary(p->one); + p->two->is_binary = file_is_binary(p->two); + } + } + if (options->break_opt != -1) diffcore_break(options->break_opt); if (options->detect_rename) diff --git a/diffcore-break.c b/diffcore-break.c index 9c19b8c..ae8a7d0 100644 --- a/diffcore-break.c +++ b/diffcore-break.c @@ -66,8 +66,7 @@ static int should_break(struct diff_filespec *src, if (base_size < MINIMUM_BREAK_SIZE) return 0; /* we do not break too small filepair */ - if (diffcore_count_changes(src->data, src->size, - dst->data, dst->size, + if (diffcore_count_changes(src, dst, NULL, NULL, 0, &src_copied, &literal_added)) diff --git a/diffcore-delta.c b/diffcore-delta.c index 7338a40..a038b16 100644 --- a/diffcore-delta.c +++ b/diffcore-delta.c @@ -5,23 +5,20 @@ /* * Idea here is very simple. * - * We have total of (sz-N+1) N-byte overlapping sequences in buf whose - * size is sz. If the same N-byte sequence appears in both source and - * destination, we say the byte that starts that sequence is shared - * between them (i.e. copied from source to destination). + * Almost all data we are interested in are text, but sometimes we have + * to deal with binary data. So we cut them into chunks delimited by + * LF byte, or 64-byte sequence, whichever comes first, and hash them. * - * For each possible N-byte sequence, if the source buffer has more - * instances of it than the destination buffer, that means the - * difference are the number of bytes not copied from source to - * destination. If the counts are the same, everything was copied - * from source to destination. If the destination has more, - * everything was copied, and destination added more. + * For those chunks, if the source buffer has more instances of it + * than the destination buffer, that means the difference are the + * number of bytes not copied from source to destination. If the + * counts are the same, everything was copied from source to + * destination. If the destination has more, everything was copied, + * and destination added more. * * We are doing an approximation so we do not really have to waste * memory by actually storing the sequence. We just hash them into * somewhere around 2^16 hashbuckets and count the occurrences. - * - * The length of the sequence is arbitrarily set to 8 for now. */ /* Wild guess at the initial hash size */ @@ -125,11 +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)); @@ -143,6 +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; @@ -156,8 +161,8 @@ static struct spanhash_top *hash_chars(unsigned char *buf, unsigned int sz) return hash; } -int diffcore_count_changes(void *src, unsigned long src_size, - void *dst, unsigned long dst_size, +int diffcore_count_changes(struct diff_filespec *src, + struct diff_filespec *dst, void **src_count_p, void **dst_count_p, unsigned long delta_limit, @@ -172,14 +177,14 @@ int diffcore_count_changes(void *src, unsigned long src_size, if (src_count_p) src_count = *src_count_p; if (!src_count) { - src_count = hash_chars(src, 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, dst_size); + dst_count = hash_chars(dst); if (dst_count_p) *dst_count_p = dst_count; } diff --git a/diffcore-rename.c b/diffcore-rename.c index e0a89f3..6bde439 100644 --- a/diffcore-rename.c +++ b/diffcore-rename.c @@ -190,8 +190,7 @@ static int estimate_similarity(struct diff_filespec *src, delta_limit = (unsigned long) (base_size * (MAX_SCORE-minimum_score) / MAX_SCORE); - if (diffcore_count_changes(src->data, src->size, - dst->data, dst->size, + if (diffcore_count_changes(src, dst, &src->cnt_data, &dst->cnt_data, delta_limit, &src_copied, &literal_added)) @@ -37,6 +37,7 @@ struct diff_filespec { #define DIFF_FILE_VALID(spec) (((spec)->mode) != 0) unsigned should_free : 1; /* data should be free()'ed */ unsigned should_munmap : 1; /* data should be munmap()'ed */ + unsigned is_binary : 1; /* data should be considered "binary" */ }; extern struct diff_filespec *alloc_filespec(const char *); @@ -103,8 +104,8 @@ void diff_debug_queue(const char *, struct diff_queue_struct *); #define diff_debug_queue(a,b) do {} while(0) #endif -extern int diffcore_count_changes(void *src, unsigned long src_size, - void *dst, unsigned long dst_size, +extern int diffcore_count_changes(struct diff_filespec *src, + struct diff_filespec *dst, void **src_count_p, void **dst_count_p, unsigned long delta_limit, diff --git a/t/t0022-crlf-rename.sh b/t/t0022-crlf-rename.sh new file mode 100755 index 0000000..430a1d1 --- /dev/null +++ b/t/t0022-crlf-rename.sh @@ -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 |