From: Junio C Hamano Date: Sun, 22 May 2005 17:04:37 +0000 (-0700) Subject: [PATCH] Diffcore updates. X-Git-Tag: v0.99~504 X-Git-Url: http://git.tremily.us/?a=commitdiff_plain;h=6b14d7faf0bad026a81a27bac07b47691f621b8f;p=git.git [PATCH] Diffcore updates. This moves the path selection logic from individual programs to a new diffcore transformer (diff-tree still needs to have its own for performance reasons). Also the header printing code in diff-tree was tweaked not to produce anything when pickaxe is in effect and there is nothing interesting to report. An interesting example is the following in the GIT archive itself: $ git-whatchanged -p -C -S'or something in a real script' Signed-off-by: Junio C Hamano Signed-off-by: Linus Torvalds --- diff --git a/Makefile b/Makefile index cef21b767..7a2298918 100644 --- a/Makefile +++ b/Makefile @@ -45,7 +45,7 @@ LIB_H += strbuf.h LIB_OBJS += strbuf.o LIB_H += diff.h -LIB_OBJS += diff.o diffcore-rename.o diffcore-pickaxe.o +LIB_OBJS += diff.o diffcore-rename.o diffcore-pickaxe.o diffcore-pathspec.o LIB_OBJS += gitenv.o @@ -123,9 +123,10 @@ sha1_file.o: $(LIB_H) usage.o: $(LIB_H) strbuf.o: $(LIB_H) gitenv.o: $(LIB_H) -diff.o: $(LIB_H) -diffcore-rename.o : $(LIB_H) -diffcore-pickaxe.o : $(LIB_H) +diff.o: $(LIB_H) diffcore.h +diffcore-rename.o : $(LIB_H) diffcore.h +diffcore-pathspec.o : $(LIB_H) diffcore.h +diffcore-pickaxe.o : $(LIB_H) diffcore.h test: all make -C t/ all diff --git a/diff-cache.c b/diff-cache.c index 54691a94c..3c8f9e0ee 100644 --- a/diff-cache.c +++ b/diff-cache.c @@ -71,7 +71,7 @@ static int show_modified(struct cache_entry *old, oldmode = old->ce_mode; if (mode == oldmode && !memcmp(sha1, old->sha1, 20) && - detect_rename < 2) + detect_rename < DIFF_DETECT_COPY) return 0; mode = ntohl(mode); @@ -156,7 +156,7 @@ static void mark_merge_entries(void) static char *diff_cache_usage = "git-diff-cache [-p] [-r] [-z] [-m] [-M] [-C] [-R] [-S] [--cached] "; -int main(int argc, char **argv) +int main(int argc, const char **argv) { unsigned char tree_sha1[20]; void *tree; @@ -165,7 +165,7 @@ int main(int argc, char **argv) read_cache(); while (argc > 2) { - char *arg = argv[1]; + const char *arg = argv[1]; argv++; argc--; if (!strcmp(arg, "-r")) { @@ -177,12 +177,12 @@ int main(int argc, char **argv) continue; } if (!strncmp(arg, "-M", 2)) { - detect_rename = 1; + detect_rename = DIFF_DETECT_RENAME; diff_score_opt = diff_scoreopt_parse(arg); continue; } if (!strncmp(arg, "-C", 2)) { - detect_rename = 2; + detect_rename = DIFF_DETECT_COPY; diff_score_opt = diff_scoreopt_parse(arg); continue; } @@ -209,10 +209,14 @@ int main(int argc, char **argv) usage(diff_cache_usage); } - if (argc != 2 || get_sha1(argv[1], tree_sha1)) + if (argc < 2 || get_sha1(argv[1], tree_sha1)) usage(diff_cache_usage); + argv++; + argc--; - diff_setup(reverse_diff, diff_output_format); + /* The rest is for paths restriction. */ + + diff_setup(reverse_diff); mark_merge_entries(); @@ -224,9 +228,12 @@ int main(int argc, char **argv) ret = diff_cache(active_cache, active_nr); if (detect_rename) - diff_detect_rename(detect_rename, diff_score_opt); + diffcore_rename(detect_rename, diff_score_opt); + diffcore_prune(); if (pickaxe) - diff_pickaxe(pickaxe); - diff_flush(NULL, 0); + diffcore_pickaxe(pickaxe); + if (2 <= argc) + diffcore_pathspec(argv + 1); + diff_flush(diff_output_format); return ret; } diff --git a/diff-files.c b/diff-files.c index 884d45246..4e0a306ef 100644 --- a/diff-files.c +++ b/diff-files.c @@ -16,21 +16,6 @@ static int diff_score_opt = 0; static const char *pickaxe = NULL; static int silent = 0; -static int matches_pathspec(struct cache_entry *ce, char **spec, int cnt) -{ - int i; - int namelen = ce_namelen(ce); - for (i = 0; i < cnt; i++) { - int speclen = strlen(spec[i]); - if (! strncmp(spec[i], ce->name, speclen) && - speclen <= namelen && - (ce->name[speclen] == 0 || - ce->name[speclen] == '/')) - return 1; - } - return 0; -} - static void show_unmerge(const char *path) { diff_unmerge(path); @@ -48,7 +33,7 @@ static void show_modified(int oldmode, int mode, diff_change(oldmode, mode, old_sha1, sha1, path, NULL); } -int main(int argc, char **argv) +int main(int argc, const char **argv) { static const unsigned char null_sha1[20] = { 0, }; int entries = read_cache(); @@ -71,11 +56,11 @@ int main(int argc, char **argv) pickaxe = argv[1] + 2; else if (!strncmp(argv[1], "-M", 2)) { diff_score_opt = diff_scoreopt_parse(argv[1]); - detect_rename = 1; + detect_rename = DIFF_DETECT_RENAME; } else if (!strncmp(argv[1], "-C", 2)) { diff_score_opt = diff_scoreopt_parse(argv[1]); - detect_rename = 2; + detect_rename = DIFF_DETECT_COPY; } else usage(diff_files_usage); @@ -90,7 +75,7 @@ int main(int argc, char **argv) exit(1); } - diff_setup(reverse_diff, diff_output_format); + diff_setup(reverse_diff); for (i = 0; i < entries; i++) { struct stat st; @@ -98,10 +83,6 @@ int main(int argc, char **argv) struct cache_entry *ce = active_cache[i]; int changed; - if (1 < argc && - ! matches_pathspec(ce, argv+1, argc-1)) - continue; - if (ce_stage(ce)) { show_unmerge(ce->name); while (i < entries && @@ -122,7 +103,7 @@ int main(int argc, char **argv) continue; } changed = ce_match_stat(ce, &st); - if (!changed && detect_rename < 2) + if (!changed && detect_rename < DIFF_DETECT_COPY) continue; oldmode = ntohl(ce->ce_mode); @@ -133,9 +114,12 @@ int main(int argc, char **argv) ce->name); } if (detect_rename) - diff_detect_rename(detect_rename, diff_score_opt); + diffcore_rename(detect_rename, diff_score_opt); + diffcore_prune(); if (pickaxe) - diff_pickaxe(pickaxe); - diff_flush(NULL, 0); + diffcore_pickaxe(pickaxe); + if (1 < argc) + diffcore_pathspec(argv + 1); + diff_flush(diff_output_format); return 0; } diff --git a/diff-helper.c b/diff-helper.c index d64d3baf9..0bc54a343 100644 --- a/diff-helper.c +++ b/diff-helper.c @@ -77,11 +77,11 @@ int main(int ac, const char **av) { else if (av[1][1] == 'P') /* hidden from the help */ diff_output_style = DIFF_FORMAT_MACHINE; else if (av[1][1] == 'M') { - detect_rename = 1; + detect_rename = DIFF_DETECT_RENAME; diff_score_opt = diff_scoreopt_parse(av[1]); } else if (av[1][1] == 'C') { - detect_rename = 2; + detect_rename = DIFF_DETECT_COPY; diff_score_opt = diff_scoreopt_parse(av[1]); } else if (av[1][1] == 'S') { @@ -93,7 +93,7 @@ int main(int ac, const char **av) { } /* the remaining parameters are paths patterns */ - diff_setup(reverse_diff, diff_output_style); + diff_setup(reverse_diff); while (1) { int status; read_line(&sb1, stdin, line_termination); @@ -121,14 +121,17 @@ int main(int ac, const char **av) { status = parse_diff_raw(sb1.buf+1, NULL, NULL); if (status) { unrecognized: - diff_flush(av+1, ac-1); + diff_flush(diff_output_style); printf("%s%c", sb1.buf, line_termination); } } if (detect_rename) - diff_detect_rename(detect_rename, diff_score_opt); + diffcore_rename(detect_rename, diff_score_opt); + diffcore_prune(); if (pickaxe) - diff_pickaxe(pickaxe); - diff_flush(av+1, ac-1); + diffcore_pickaxe(pickaxe); + if (ac) + diffcore_pathspec(av + 1); + diff_flush(diff_output_style); return 0; } diff --git a/diff-tree.c b/diff-tree.c index 3428a6ee9..0b629d20b 100644 --- a/diff-tree.c +++ b/diff-tree.c @@ -18,7 +18,7 @@ static const char *header_prefix = ""; // What paths are we interested in? static int nr_paths = 0; -static char **paths = NULL; +static const char **paths = NULL; static int *pathlens = NULL; static int diff_tree_sha1(const unsigned char *old, const unsigned char *new, const char *base); @@ -67,11 +67,6 @@ static void show_file(const char *prefix, void *tree, unsigned long size, const const char *path; const unsigned char *sha1 = extract(tree, size, &path, &mode); - if (header) { - printf("%s", header); - header = NULL; - } - if (silent) return; @@ -137,10 +132,6 @@ static int compare_tree_entry(void *tree1, unsigned long size1, void *tree2, uns return retval; } - if (header) { - printf("%s", header); - header = NULL; - } if (silent) return 0; @@ -268,16 +259,29 @@ static int diff_tree_sha1(const unsigned char *old, const unsigned char *new, co static void call_diff_setup(void) { - diff_setup(reverse_diff, diff_output_format); + diff_setup(reverse_diff); } -static void call_diff_flush(void) +static int call_diff_flush() { if (detect_rename) - diff_detect_rename(detect_rename, diff_score_opt); - if (pickaxe) - diff_pickaxe(pickaxe); - diff_flush(NULL, 0); + diffcore_rename(detect_rename, diff_score_opt); + diffcore_prune(); + if (pickaxe) { + diffcore_pickaxe(pickaxe); + if (diff_queue_is_empty()) { + diff_flush(DIFF_FORMAT_NO_OUTPUT); + return 0; + } + } + if (nr_paths) + diffcore_pathspec(paths); + if (header) { + printf("%s", header); + header = NULL; + } + diff_flush(diff_output_format); + return 1; } static int diff_tree_sha1_top(const unsigned char *old, @@ -462,7 +466,7 @@ static int diff_tree_stdin(char *line) static char *diff_tree_usage = "git-diff-tree [-p] [-r] [-z] [--stdin] [-M] [-C] [-R] [-S] [-m] [-s] [-v] "; -int main(int argc, char **argv) +int main(int argc, const char **argv) { int nr_sha1; char line[1000]; @@ -470,7 +474,7 @@ int main(int argc, char **argv) nr_sha1 = 0; for (;;) { - char *arg; + const char *arg; argv++; argc--; @@ -509,12 +513,12 @@ int main(int argc, char **argv) continue; } if (!strncmp(arg, "-M", 2)) { - detect_rename = 1; + detect_rename = DIFF_DETECT_RENAME; diff_score_opt = diff_scoreopt_parse(arg); continue; } if (!strncmp(arg, "-C", 2)) { - detect_rename = 2; + detect_rename = DIFF_DETECT_COPY; diff_score_opt = diff_scoreopt_parse(arg); continue; } diff --git a/diff.c b/diff.c index a6cbf44f4..eb8424e22 100644 --- a/diff.c +++ b/diff.c @@ -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); } diff --git a/diff.h b/diff.h index 1fc8469cf..cae6e14fc 100644 --- a/diff.h +++ b/diff.h @@ -26,16 +26,24 @@ extern void diff_unmerge(const char *path); extern int diff_scoreopt_parse(const char *opt); -#define DIFF_FORMAT_HUMAN 0 -#define DIFF_FORMAT_MACHINE 1 -#define DIFF_FORMAT_PATCH 2 -extern void diff_setup(int reverse, int diff_output_style); +#define DIFF_FORMAT_HUMAN 0 +#define DIFF_FORMAT_MACHINE 1 +#define DIFF_FORMAT_PATCH 2 +#define DIFF_FORMAT_NO_OUTPUT 3 +extern void diff_setup(int reverse); -extern void diff_detect_rename(int, int); -extern void diff_pickaxe(const char *); +#define DIFF_DETECT_RENAME 1 +#define DIFF_DETECT_COPY 2 + +extern void diffcore_rename(int rename_copy, int minimum_score); + +extern void diffcore_prune(void); + +extern void diffcore_pickaxe(const char *needle); +extern void diffcore_pathspec(const char **pathspec); extern int diff_queue_is_empty(void); -extern void diff_flush(const char **, int); +extern void diff_flush(int output_style); #endif /* DIFF_H */ diff --git a/diffcore-pathspec.c b/diffcore-pathspec.c new file mode 100644 index 000000000..25ab9eda9 --- /dev/null +++ b/diffcore-pathspec.c @@ -0,0 +1,63 @@ +/* + * Copyright (C) 2005 Junio C Hamano + */ +#include "cache.h" +#include "diff.h" +#include "diffcore.h" +#include "delta.h" + +struct path_spec { + const char *spec; + int len; +}; + +static int matches_pathspec(const char *name, struct path_spec *s, int cnt) +{ + int i; + int namelen; + + if (cnt == 0) + return 1; + + namelen = strlen(name); + for (i = 0; i < cnt; i++) { + int len = s->len; + if (! strncmp(s->spec, name, len) && + len <= namelen && + (name[len] == 0 || name[len] == '/')) + return 1; + } + return 0; +} + +void diffcore_pathspec(const char **pathspec) +{ + struct diff_queue_struct *q = &diff_queued_diff; + int i, speccnt; + struct diff_queue_struct outq; + struct path_spec *spec; + + outq.queue = NULL; + outq.nr = outq.alloc = 0; + + for (i = 0; pathspec[i]; i++) + ; + speccnt = i; + spec = xmalloc(sizeof(*spec) * speccnt); + for (i = 0; pathspec[i]; i++) { + spec[i].spec = pathspec[i]; + spec[i].len = strlen(pathspec[i]); + } + + for (i = 0; i < q->nr; i++) { + struct diff_filepair *p = q->queue[i]; + if (matches_pathspec(p->one->path, spec, speccnt) || + matches_pathspec(p->two->path, spec, speccnt)) + diff_q(&outq, p); + else + diff_free_filepair(p); + } + free(q->queue); + *q = outq; + return; +} diff --git a/diffcore-pickaxe.c b/diffcore-pickaxe.c index 0bad705d5..08d1bb744 100644 --- a/diffcore-pickaxe.c +++ b/diffcore-pickaxe.c @@ -21,7 +21,7 @@ static int contains(struct diff_filespec *one, return 0; } -void diff_pickaxe(const char *needle) +void diffcore_pickaxe(const char *needle) { struct diff_queue_struct *q = &diff_queued_diff; unsigned long len = strlen(needle); @@ -32,24 +32,23 @@ void diff_pickaxe(const char *needle) for (i = 0; i < q->nr; i++) { struct diff_filepair *p = q->queue[i]; + int onum = outq.nr; if (!DIFF_FILE_VALID(p->one)) { if (!DIFF_FILE_VALID(p->two)) continue; /* ignore nonsense */ /* created */ if (contains(p->two, needle, len)) - diff_queue(&outq, p->one, p->two); + diff_q(&outq, p); } else if (!DIFF_FILE_VALID(p->two)) { if (contains(p->one, needle, len)) - diff_queue(&outq, p->one, p->two); + diff_q(&outq, p); } else if (contains(p->one, needle, len) != contains(p->two, needle, len)) - diff_queue(&outq, p->one, p->two); - } - for (i = 0; i < q->nr; i++) { - struct diff_filepair *p = q->queue[i]; - free(p); + diff_q(&outq, p); + if (onum == outq.nr) + diff_free_filepair(p); } free(q->queue); *q = outq; diff --git a/diffcore-rename.c b/diffcore-rename.c index 8de80dfe7..794e5cc7d 100644 --- a/diffcore-rename.c +++ b/diffcore-rename.c @@ -224,8 +224,25 @@ static int needs_to_stay(struct diff_queue_struct *q, int i, return 0; } -void diff_detect_rename(int detect_rename, - int minimum_score) +int diff_scoreopt_parse(const char *opt) +{ + 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; +} + +void diffcore_rename(int detect_rename, int minimum_score) { struct diff_queue_struct *q = &diff_queued_diff; struct diff_queue_struct outq; diff --git a/diffcore.h b/diffcore.h index 5eca32afc..d087e1758 100644 --- a/diffcore.h +++ b/diffcore.h @@ -45,6 +45,8 @@ struct diff_filepair { int orig_order; /* the original order of insertion into the queue */ int xfrm_work; /* for use by tramsformers, not by diffcore */ }; +#define DIFF_PAIR_UNMERGED(p) \ + (!DIFF_FILE_VALID((p)->one) && !DIFF_FILE_VALID((p)->two)) struct diff_queue_struct { struct diff_filepair **queue; @@ -56,5 +58,7 @@ extern struct diff_queue_struct diff_queued_diff; extern struct diff_filepair *diff_queue(struct diff_queue_struct *, struct diff_filespec *, struct diff_filespec *); +extern void diff_q(struct diff_queue_struct *, struct diff_filepair *); +extern void diff_free_filepair(struct diff_filepair *); #endif