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2842c0f914
The traverse_trees() machinery is primarily meant for merging two (or
more) trees, and because a merge is a full tree operation, it doesn't
support any pruning with pathspec.
Since d1f2d7e (Make run_diff_index() use unpack_trees(), not read_tree(),
2008-01-19), however, we use unpack_trees() to traverse_trees() callchain
to perform "diff-index", which could waste a lot of work traversing trees
outside the user-supplied pathspec, only to discard at the blob comparison
level in diff-lib.c::oneway_diff() which is way too late.
Signed-off-by: Junio C Hamano <gitster@pobox.com>
66 lines
1.9 KiB
C
66 lines
1.9 KiB
C
#ifndef TREE_WALK_H
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#define TREE_WALK_H
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struct name_entry {
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const unsigned char *sha1;
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const char *path;
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unsigned int mode;
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};
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struct tree_desc {
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const void *buffer;
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struct name_entry entry;
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unsigned int size;
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};
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static inline const unsigned char *tree_entry_extract(struct tree_desc *desc, const char **pathp, unsigned int *modep)
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{
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*pathp = desc->entry.path;
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*modep = canon_mode(desc->entry.mode);
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return desc->entry.sha1;
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}
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static inline int tree_entry_len(const char *name, const unsigned char *sha1)
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{
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return (const char *)sha1 - name - 1;
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}
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void update_tree_entry(struct tree_desc *);
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void init_tree_desc(struct tree_desc *desc, const void *buf, unsigned long size);
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/*
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* Helper function that does both tree_entry_extract() and update_tree_entry()
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* and returns true for success
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*/
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int tree_entry(struct tree_desc *, struct name_entry *);
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void *fill_tree_descriptor(struct tree_desc *desc, const unsigned char *sha1);
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struct traverse_info;
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typedef int (*traverse_callback_t)(int n, unsigned long mask, unsigned long dirmask, struct name_entry *entry, struct traverse_info *);
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int traverse_trees(int n, struct tree_desc *t, struct traverse_info *info);
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struct traverse_info {
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struct traverse_info *prev;
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struct name_entry name;
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int pathlen;
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struct pathspec *pathspec;
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unsigned long conflicts;
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traverse_callback_t fn;
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void *data;
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int show_all_errors;
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};
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int get_tree_entry(const unsigned char *, const char *, unsigned char *, unsigned *);
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extern char *make_traverse_path(char *path, const struct traverse_info *info, const struct name_entry *n);
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extern void setup_traverse_info(struct traverse_info *info, const char *base);
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static inline int traverse_path_len(const struct traverse_info *info, const struct name_entry *n)
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{
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return info->pathlen + tree_entry_len(n->path, n->sha1);
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}
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extern int tree_entry_interesting(const struct name_entry *, struct strbuf *, int, const struct pathspec *ps);
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#endif
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