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4651ece854
This makes the tree descriptor contain a "struct name_entry" as part of it, and it gets filled in so that it always contains a valid entry. On some benchmarks, it improves performance by up to 15%. That makes tree entry "extract" trivial, and means that we only actually need to decode each tree entry just once: we decode the first one when we initialize the tree descriptor, and each subsequent one when doing "update_tree_entry()". In particular, this means that we don't need to do strlen() both at extract time _and_ at update time. Finally, it also allows more sharing of code (entry_extract(), that wanted a "struct name_entry", just got totally trivial, along with the "tree_entry()" function). Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Junio C Hamano <junkio@cox.net>
43 lines
1.3 KiB
C
43 lines
1.3 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 (char *)sha1 - (char *)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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const unsigned char *tree_entry_extract(struct tree_desc *, const char **, unsigned int *);
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/* Helper function that does both of the above and returns true for success */
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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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typedef void (*traverse_callback_t)(int n, unsigned long mask, struct name_entry *entry, const char *base);
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void traverse_trees(int n, struct tree_desc *t, const char *base, traverse_callback_t callback);
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int get_tree_entry(const unsigned char *, const char *, unsigned char *, unsigned *);
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#endif
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