streaming: convert istream internals to struct object_id
[git/git.git] / tree-walk.h
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1b0c7174
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1#ifndef TREE_WALK_H
2#define TREE_WALK_H
3
1b0c7174 4struct name_entry {
7d924c91 5 const struct object_id *oid;
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6 const char *path;
7 unsigned int mode;
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8};
9
4651ece8
LT
10struct tree_desc {
11 const void *buffer;
12 struct name_entry entry;
13 unsigned int size;
14};
15
ce6663a9 16static inline const struct object_id *tree_entry_extract(struct tree_desc *desc, const char **pathp, unsigned int *modep)
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17{
18 *pathp = desc->entry.path;
7146e66f 19 *modep = desc->entry.mode;
ce6663a9 20 return desc->entry.oid;
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21}
22
0de16337 23static inline int tree_entry_len(const struct name_entry *ne)
304de2d2 24{
7d924c91 25 return (const char *)ne->oid - ne->path - 1;
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LT
26}
27
8354fa3d
DT
28/*
29 * The _gently versions of these functions warn and return false on a
30 * corrupt tree entry rather than dying,
31 */
32
1b0c7174 33void update_tree_entry(struct tree_desc *);
8354fa3d 34int update_tree_entry_gently(struct tree_desc *);
6fda5e51 35void init_tree_desc(struct tree_desc *desc, const void *buf, unsigned long size);
8354fa3d 36int init_tree_desc_gently(struct tree_desc *desc, const void *buf, unsigned long size);
1b0c7174 37
2244eab0
EN
38/*
39 * Helper function that does both tree_entry_extract() and update_tree_entry()
40 * and returns true for success
41 */
4c068a98 42int tree_entry(struct tree_desc *, struct name_entry *);
8354fa3d 43int tree_entry_gently(struct tree_desc *, struct name_entry *);
4c068a98 44
5c377d3d 45void *fill_tree_descriptor(struct tree_desc *desc, const struct object_id *oid);
1b0c7174 46
40d934df 47struct traverse_info;
91e4f036 48typedef int (*traverse_callback_t)(int n, unsigned long mask, unsigned long dirmask, struct name_entry *entry, struct traverse_info *);
5803c6f8 49int traverse_trees(int n, struct tree_desc *t, struct traverse_info *info);
1b0c7174 50
275721c2
DT
51enum follow_symlinks_result {
52 FOUND = 0, /* This includes out-of-tree links */
53 MISSING_OBJECT = -1, /* The initial symlink is missing */
54 DANGLING_SYMLINK = -2, /*
55 * The initial symlink is there, but
56 * (transitively) points to a missing
57 * in-tree file
58 */
59 SYMLINK_LOOP = -3,
60 NOT_DIR = -4, /*
61 * Somewhere along the symlink chain, a path is
62 * requested which contains a file as a
63 * non-final element.
64 */
65};
66
67enum follow_symlinks_result get_tree_entry_follow_symlinks(unsigned char *tree_sha1, const char *name, unsigned char *result, struct strbuf *result_path, unsigned *mode);
68
40d934df 69struct traverse_info {
d9c2bd56 70 const char *traverse_path;
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71 struct traverse_info *prev;
72 struct name_entry name;
73 int pathlen;
2842c0f9 74 struct pathspec *pathspec;
40d934df 75
603d2498 76 unsigned long df_conflicts;
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77 traverse_callback_t fn;
78 void *data;
e6c111b4 79 int show_all_errors;
40d934df 80};
1b0c7174 81
4dcff634 82int get_tree_entry(const unsigned char *, const char *, unsigned char *, unsigned *);
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83extern char *make_traverse_path(char *path, const struct traverse_info *info, const struct name_entry *n);
84extern void setup_traverse_info(struct traverse_info *info, const char *base);
85
86static inline int traverse_path_len(const struct traverse_info *info, const struct name_entry *n)
87{
0de16337 88 return info->pathlen + tree_entry_len(n);
40d934df 89}
4dcff634 90
d688cf07
NTND
91/* in general, positive means "kind of interesting" */
92enum interesting {
93 all_entries_not_interesting = -1, /* no, and no subsequent entries will be either */
94 entry_not_interesting = 0,
95 entry_interesting = 1,
96 all_entries_interesting = 2 /* yes, and all subsequent entries will be */
97};
98
99extern enum interesting tree_entry_interesting(const struct name_entry *,
100 struct strbuf *, int,
101 const struct pathspec *ps);
2c389fc8 102
1b0c7174 103#endif