diff options
Diffstat (limited to 'diff.c')
| -rw-r--r-- | diff.c | 172 |
1 files changed, 90 insertions, 82 deletions
@@ -16,8 +16,6 @@ static int reverse_diff; static int generate_patch; static int line_termination = '\n'; static int inter_name_termination = '\t'; -static const char **pathspec; -static int speccnt; static const char *external_diff(void) { @@ -286,6 +284,12 @@ int diff_populate_filespec(struct diff_filespec *s) return 0; } +void diff_free_filepair(struct diff_filepair *p) +{ + free(p->xfrm_msg); + free(p); +} + void diff_free_filespec_data(struct diff_filespec *s) { if (s->should_free) @@ -390,25 +394,6 @@ static void remove_tempfile_on_signal(int signo) remove_tempfile(); } -static int matches_pathspec(const char *name) -{ - int i; - int namelen; - - if (speccnt == 0) - return 1; - - namelen = strlen(name); - for (i = 0; i < speccnt; i++) { - int speclen = strlen(pathspec[i]); - if (! strncmp(pathspec[i], name, speclen) && - speclen <= namelen && - (name[speclen] == 0 || name[speclen] == '/')) - return 1; - } - return 0; -} - /* An external diff command takes: * * diff-cmd name infile1 infile1-sha1 infile1-mode \ @@ -426,9 +411,6 @@ static void run_external_diff(const char *name, int status; static int atexit_asked = 0; - if (!matches_pathspec(name) && (!other || !matches_pathspec(other))) - return; - if (one && two) { prepare_temp_file(name, &temp[0], one); prepare_temp_file(other ? : name, &temp[1], two); @@ -496,47 +478,26 @@ static void run_external_diff(const char *name, remove_tempfile(); } -int diff_scoreopt_parse(const char *opt) +void diff_setup(int reverse_diff_) { - int diglen, num, scale, i; - if (opt[0] != '-' || (opt[1] != 'M' && opt[1] != 'C')) - return -1; /* that is not a -M nor -C option */ - diglen = strspn(opt+2, "0123456789"); - if (diglen == 0 || strlen(opt+2) != diglen) - return 0; /* use default */ - sscanf(opt+2, "%d", &num); - for (i = 0, scale = 1; i < diglen; i++) - scale *= 10; - - /* user says num divided by scale and we say internally that - * is MAX_SCORE * num / scale. - */ - return MAX_SCORE * num / scale; + reverse_diff = reverse_diff_; } -void diff_setup(int reverse_diff_, int diff_output_style) +struct diff_queue_struct diff_queued_diff; + +void diff_q(struct diff_queue_struct *queue, struct diff_filepair *dp) { - reverse_diff = reverse_diff_; - generate_patch = 0; - switch (diff_output_style) { - case DIFF_FORMAT_HUMAN: - line_termination = '\n'; - inter_name_termination = '\t'; - break; - case DIFF_FORMAT_MACHINE: - line_termination = inter_name_termination = 0; - break; - case DIFF_FORMAT_PATCH: - generate_patch = 1; - break; + if (queue->alloc <= queue->nr) { + queue->alloc = alloc_nr(queue->alloc); + queue->queue = xrealloc(queue->queue, + sizeof(dp) * queue->alloc); } + queue->queue[queue->nr++] = dp; } -struct diff_queue_struct diff_queued_diff; - struct diff_filepair *diff_queue(struct diff_queue_struct *queue, - struct diff_filespec *one, - struct diff_filespec *two) + struct diff_filespec *one, + struct diff_filespec *two) { struct diff_filepair *dp = xmalloc(sizeof(*dp)); dp->one = one; @@ -544,20 +505,16 @@ struct diff_filepair *diff_queue(struct diff_queue_struct *queue, dp->xfrm_msg = 0; dp->orig_order = queue->nr; dp->xfrm_work = 0; - if (queue->alloc <= queue->nr) { - queue->alloc = alloc_nr(queue->alloc); - queue->queue = xrealloc(queue->queue, - sizeof(dp) * queue->alloc); - } - queue->queue[queue->nr++] = dp; + diff_q(queue, dp); return dp; } static void diff_flush_raw(struct diff_filepair *p) { - /* - * We used to reject rename/copy but new diff-raw can express them. - */ + if (DIFF_PAIR_UNMERGED(p)) { + printf("U %s%c", p->one->path, line_termination); + return; + } printf(":%06o %06o %s ", p->one->mode, p->two->mode, sha1_to_hex(p->one->sha1)); printf("%s%c%s%c%s%c", @@ -576,19 +533,26 @@ static void diff_flush_patch(struct diff_filepair *p) (DIFF_FILE_VALID(p->two) && S_ISDIR(p->two->mode))) return; /* no tree diffs in patch format */ - run_external_diff(name, other, p->one, p->two, p->xfrm_msg); + if (DIFF_PAIR_UNMERGED(p)) + run_external_diff(name, NULL, NULL, NULL, NULL); + else + run_external_diff(name, other, p->one, p->two, p->xfrm_msg); } -static int identical(struct diff_filespec *one, struct diff_filespec *two) +static int uninteresting(struct diff_filepair *p) { /* This function is written stricter than necessary to support * the currently implemented transformers, but the idea is to * let transformers to produce diff_filepairs any way they want, * and filter and clean them up here before producing the output. */ + struct diff_filespec *one, *two; + + if (DIFF_PAIR_UNMERGED(p)) + return 0; /* unmerged is interesting */ - if (!DIFF_FILE_VALID(one) && !DIFF_FILE_VALID(two)) - return 1; /* not interesting */ + one = p->one; + two = p->two; /* deletion, addition, mode change and renames are all interesting. */ if (DIFF_FILE_VALID(one) != DIFF_FILE_VALID(two) || @@ -607,9 +571,44 @@ static int identical(struct diff_filespec *one, struct diff_filespec *two) return 0; } +void diffcore_prune(void) +{ + /* + * Although rename/copy detection wants to have "no-change" + * entries fed into them, the downstream do not need to see + * them. This function removes such entries. + * + * The applications that use rename/copy should: + * + * (1) feed change and "no-change" entries via diff_queue(). + * (2) call diffcore_rename, and any other future diffcore_xxx + * that would benefit by still having "no-change" entries. + * (3) call diffcore_prune + * (4) call other diffcore_xxx that do not need to see + * "no-change" entries. + */ + struct diff_queue_struct *q = &diff_queued_diff; + struct diff_queue_struct outq; + int i; + + outq.queue = NULL; + outq.nr = outq.alloc = 0; + + for (i = 0; i < q->nr; i++) { + struct diff_filepair *p = q->queue[i]; + if (!uninteresting(p)) + diff_q(&outq, p); + else + diff_free_filepair(p); + } + free(q->queue); + *q = outq; + return; +} + static void diff_flush_one(struct diff_filepair *p) { - if (identical(p->one, p->two)) + if (uninteresting(p)) return; if (generate_patch) diff_flush_patch(p); @@ -624,23 +623,32 @@ int diff_queue_is_empty(void) for (i = 0; i < q->nr; i++) { struct diff_filepair *p = q->queue[i]; - if (!identical(p->one, p->two)) + if (!uninteresting(p)) return 0; } return 1; } -void diff_flush(const char **pathspec_, int speccnt_) +void diff_flush(int diff_output_style) { struct diff_queue_struct *q = &diff_queued_diff; int i; - pathspec = pathspec_; - speccnt = speccnt_; - + generate_patch = 0; + switch (diff_output_style) { + case DIFF_FORMAT_HUMAN: + line_termination = '\n'; + inter_name_termination = '\t'; + break; + case DIFF_FORMAT_MACHINE: + line_termination = inter_name_termination = 0; + break; + case DIFF_FORMAT_PATCH: + generate_patch = 1; + break; + } for (i = 0; i < q->nr; i++) diff_flush_one(q->queue[i]); - for (i = 0; i < q->nr; i++) { struct diff_filepair *p = q->queue[i]; diff_free_filespec_data(p->one); @@ -669,7 +677,7 @@ void diff_addremove(int addremove, unsigned mode, * which but should not make any difference). * Feeding the same new and old to diff_change() should * also have the same effect. diff_flush() should - * filter the identical ones out at the final output + * filter uninteresting ones out at the final output * stage. */ if (reverse_diff) @@ -739,8 +747,8 @@ void diff_change(unsigned old_mode, unsigned new_mode, void diff_unmerge(const char *path) { - if (generate_patch) - run_external_diff(path, NULL, NULL, NULL, NULL); - else - printf("U %s%c", path, line_termination); + struct diff_filespec *one, *two; + one = alloc_filespec(path); + two = alloc_filespec(path); + diff_queue(&diff_queued_diff, one, two); } |