ea82b2a085
When parsing a tree, we read the object ID directly out of the tree buffer. This is normally fine, but such an object ID cannot be used with oidcpy, which copies GIT_MAX_RAWSZ bytes, because if we are using SHA-1, there may not be that many bytes to copy. Instead, store the object ID in a separate struct member. Since we can no longer efficiently compute the path length, store that information as well in struct name_entry. Ensure we only copy the object ID into the new buffer if the path length is nonzero, as some callers will pass us an empty path with no object ID following it, and we will not want to read past the end of the buffer. Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
109 lines
3.2 KiB
C
109 lines
3.2 KiB
C
#ifndef TREE_WALK_H
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#define TREE_WALK_H
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#include "cache.h"
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struct strbuf;
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struct name_entry {
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struct object_id oid;
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const char *path;
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int pathlen;
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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 struct object_id *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 = desc->entry.mode;
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return &desc->entry.oid;
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}
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static inline int tree_entry_len(const struct name_entry *ne)
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{
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return ne->pathlen;
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}
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/*
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* The _gently versions of these functions warn and return false on a
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* corrupt tree entry rather than dying,
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*/
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void update_tree_entry(struct tree_desc *);
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int update_tree_entry_gently(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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int init_tree_desc_gently(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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int tree_entry_gently(struct tree_desc *, struct name_entry *);
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void *fill_tree_descriptor(struct tree_desc *desc, const struct object_id *oid);
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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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enum follow_symlinks_result {
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FOUND = 0, /* This includes out-of-tree links */
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MISSING_OBJECT = -1, /* The initial symlink is missing */
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DANGLING_SYMLINK = -2, /*
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* The initial symlink is there, but
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* (transitively) points to a missing
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* in-tree file
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*/
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SYMLINK_LOOP = -3,
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NOT_DIR = -4, /*
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* Somewhere along the symlink chain, a path is
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* requested which contains a file as a
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* non-final element.
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*/
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};
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enum follow_symlinks_result get_tree_entry_follow_symlinks(struct object_id *tree_oid, const char *name, struct object_id *result, struct strbuf *result_path, unsigned *mode);
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struct traverse_info {
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const char *traverse_path;
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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 df_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 struct object_id *, const char *, struct object_id *, 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);
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}
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/* in general, positive means "kind of interesting" */
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enum interesting {
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all_entries_not_interesting = -1, /* no, and no subsequent entries will be either */
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entry_not_interesting = 0,
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entry_interesting = 1,
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all_entries_interesting = 2 /* yes, and all subsequent entries will be */
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};
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extern enum interesting tree_entry_interesting(const struct name_entry *,
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struct strbuf *, int,
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const struct pathspec *ps);
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#endif
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