diff options
| -rw-r--r-- | tree-diff.c | 112 | ||||
| -rw-r--r-- | tree-walk.c | 114 | ||||
| -rw-r--r-- | tree-walk.h | 2 |
3 files changed, 116 insertions, 112 deletions
diff --git a/tree-diff.c b/tree-diff.c index 281b48c7c..23f4478ce 100644 --- a/tree-diff.c +++ b/tree-diff.c @@ -82,118 +82,6 @@ static int compare_tree_entry(struct tree_desc *t1, struct tree_desc *t2, const return 0; } -/* - * Is a tree entry interesting given the pathspec we have? - * - * Pre-condition: baselen == 0 || base[baselen-1] == '/' - * - * Return: - * - 2 for "yes, and all subsequent entries will be" - * - 1 for yes - * - zero for no - * - negative for "no, and no subsequent entries will be either" - */ -static int tree_entry_interesting(const struct name_entry *entry, const char *base, int baselen, const struct pathspec *ps) -{ - int i; - int pathlen; - int never_interesting = -1; - - if (!ps || !ps->nr) - return 2; - - pathlen = tree_entry_len(entry->path, entry->sha1); - - for (i = 0; i < ps->nr; i++) { - const struct pathspec_item *item = ps->items+i; - const char *match = item->match; - int matchlen = item->len; - int m = -1; /* signals that we haven't called strncmp() */ - - if (baselen >= matchlen) { - /* If it doesn't match, move along... */ - if (strncmp(base, match, matchlen)) - continue; - - /* - * If the base is a subdirectory of a path which - * was specified, all of them are interesting. - */ - if (!matchlen || - base[matchlen] == '/' || - match[matchlen - 1] == '/') - return 2; - - /* Just a random prefix match */ - continue; - } - - /* Does the base match? */ - if (strncmp(base, match, baselen)) - continue; - - match += baselen; - matchlen -= baselen; - - if (never_interesting) { - /* - * We have not seen any match that sorts later - * than the current path. - */ - - /* - * Does match sort strictly earlier than path - * with their common parts? - */ - m = strncmp(match, entry->path, - (matchlen < pathlen) ? matchlen : pathlen); - if (m < 0) - continue; - - /* - * If we come here even once, that means there is at - * least one pathspec that would sort equal to or - * later than the path we are currently looking at. - * In other words, if we have never reached this point - * after iterating all pathspecs, it means all - * pathspecs are either outside of base, or inside the - * base but sorts strictly earlier than the current - * one. In either case, they will never match the - * subsequent entries. In such a case, we initialized - * the variable to -1 and that is what will be - * returned, allowing the caller to terminate early. - */ - never_interesting = 0; - } - - if (pathlen > matchlen) - continue; - - if (matchlen > pathlen) { - if (match[pathlen] != '/') - continue; - if (!S_ISDIR(entry->mode)) - continue; - } - - if (m == -1) - /* - * we cheated and did not do strncmp(), so we do - * that here. - */ - m = strncmp(match, entry->path, pathlen); - - /* - * If common part matched earlier then it is a hit, - * because we rejected the case where path is not a - * leading directory and is shorter than match. - */ - if (!m) - return 1; - } - return never_interesting; /* No matches */ -} - /* A whole sub-tree went away or appeared */ static void show_tree(struct diff_options *opt, const char *prefix, struct tree_desc *desc, const char *base, int baselen) { diff --git a/tree-walk.c b/tree-walk.c index a9bbf4e23..522bb6b8f 100644 --- a/tree-walk.c +++ b/tree-walk.c @@ -455,3 +455,117 @@ int get_tree_entry(const unsigned char *tree_sha1, const char *name, unsigned ch free(tree); return retval; } + +/* + * Is a tree entry interesting given the pathspec we have? + * + * Pre-condition: baselen == 0 || base[baselen-1] == '/' + * + * Return: + * - 2 for "yes, and all subsequent entries will be" + * - 1 for yes + * - zero for no + * - negative for "no, and no subsequent entries will be either" + */ +int tree_entry_interesting(const struct name_entry *entry, + const char *base, int baselen, + const struct pathspec *ps) +{ + int i; + int pathlen; + int never_interesting = -1; + + if (!ps || !ps->nr) + return 2; + + pathlen = tree_entry_len(entry->path, entry->sha1); + + for (i = 0; i < ps->nr; i++) { + const struct pathspec_item *item = ps->items+i; + const char *match = item->match; + int matchlen = item->len; + int m = -1; /* signals that we haven't called strncmp() */ + + if (baselen >= matchlen) { + /* If it doesn't match, move along... */ + if (strncmp(base, match, matchlen)) + continue; + + /* + * If the base is a subdirectory of a path which + * was specified, all of them are interesting. + */ + if (!matchlen || + base[matchlen] == '/' || + match[matchlen - 1] == '/') + return 2; + + /* Just a random prefix match */ + continue; + } + + /* Does the base match? */ + if (strncmp(base, match, baselen)) + continue; + + match += baselen; + matchlen -= baselen; + + if (never_interesting) { + /* + * We have not seen any match that sorts later + * than the current path. + */ + + /* + * Does match sort strictly earlier than path + * with their common parts? + */ + m = strncmp(match, entry->path, + (matchlen < pathlen) ? matchlen : pathlen); + if (m < 0) + continue; + + /* + * If we come here even once, that means there is at + * least one pathspec that would sort equal to or + * later than the path we are currently looking at. + * In other words, if we have never reached this point + * after iterating all pathspecs, it means all + * pathspecs are either outside of base, or inside the + * base but sorts strictly earlier than the current + * one. In either case, they will never match the + * subsequent entries. In such a case, we initialized + * the variable to -1 and that is what will be + * returned, allowing the caller to terminate early. + */ + never_interesting = 0; + } + + if (pathlen > matchlen) + continue; + + if (matchlen > pathlen) { + if (match[pathlen] != '/') + continue; + if (!S_ISDIR(entry->mode)) + continue; + } + + if (m == -1) + /* + * we cheated and did not do strncmp(), so we do + * that here. + */ + m = strncmp(match, entry->path, pathlen); + + /* + * If common part matched earlier then it is a hit, + * because we rejected the case where path is not a + * leading directory and is shorter than match. + */ + if (!m) + return 1; + } + return never_interesting; /* No matches */ +} diff --git a/tree-walk.h b/tree-walk.h index 7e3e0b5ad..c12f0a297 100644 --- a/tree-walk.h +++ b/tree-walk.h @@ -60,4 +60,6 @@ static inline int traverse_path_len(const struct traverse_info *info, const stru return info->pathlen + tree_entry_len(n->path, n->sha1); } +extern int tree_entry_interesting(const struct name_entry *, const char *, int, const struct pathspec *ps); + #endif |