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git/unpack-trees.h
Junio C Hamano ca885a4fe6 read-tree() and unpack_trees(): use consistent limit
read-tree -m can read up to MAX_TREES, which was arbitrarily set to 8 since
August 2007 (4 is needed to deal with 2 merge-base case).

However, the updated unpack_trees() code had an advertised limit of 4
(which it enforced).  In reality the code was prepared to take only 3
trees and giving 4 caused it to stomp on its stack.  Rename the MAX_TREES
constant to MAX_UNPACK_TREES, move it to the unpack-trees.h common header
file, and use it from both places to avoid future confusion.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-03-13 23:56:36 -07:00

46 lines
1.1 KiB
C

#ifndef UNPACK_TREES_H
#define UNPACK_TREES_H
#define MAX_UNPACK_TREES 8
struct unpack_trees_options;
typedef int (*merge_fn_t)(struct cache_entry **src,
struct unpack_trees_options *options);
struct unpack_trees_options {
int reset;
int merge;
int update;
int index_only;
int nontrivial_merge;
int trivial_merges_only;
int verbose_update;
int aggressive;
int skip_unmerged;
int gently;
const char *prefix;
int pos;
struct dir_struct *dir;
merge_fn_t fn;
int head_idx;
int merge_size;
struct cache_entry *df_conflict_entry;
void *unpack_data;
struct index_state *dst_index;
const struct index_state *src_index;
struct index_state result;
};
extern int unpack_trees(unsigned n, struct tree_desc *t,
struct unpack_trees_options *options);
int threeway_merge(struct cache_entry **stages, struct unpack_trees_options *o);
int twoway_merge(struct cache_entry **src, struct unpack_trees_options *o);
int bind_merge(struct cache_entry **src, struct unpack_trees_options *o);
int oneway_merge(struct cache_entry **src, struct unpack_trees_options *o);
#endif