git format-patch: avoid underrun when format.headers is empty or all NLs

[git.git] / unpack-trees.h

diff --git a/unpack-trees.h b/unpack-trees.h
index 50453ed20f755fea2e7138d7f01300b318f28dce..94e567265af9a69a30dd5c578439b6444e50004d 100644 (file)
--- a/unpack-trees.h
+++ b/unpack-trees.h
@@ -8,21 +8,30 @@ struct unpack_trees_options;
 typedef int (*merge_fn_t)(struct cache_entry **src,
                struct unpack_trees_options *options);
 
+struct unpack_trees_error_msgs {
+       const char *would_overwrite;
+       const char *not_uptodate_file;
+       const char *not_uptodate_dir;
+       const char *would_lose_untracked;
+       const char *bind_overlap;
+};
+
 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;
+       unsigned int reset:1,
+                    merge:1,
+                    update:1,
+                    index_only:1,
+                    nontrivial_merge:1,
+                    trivial_merges_only:1,
+                    verbose_update:1,
+                    aggressive:1,
+                    skip_unmerged:1,
+                    gently:1;
        const char *prefix;
        int pos;
        struct dir_struct *dir;
        merge_fn_t fn;
+       struct unpack_trees_error_msgs msgs;
 
        int head_idx;
        int merge_size;
@@ -31,7 +40,7 @@ struct unpack_trees_options {
        void *unpack_data;
 
        struct index_state *dst_index;
-       const struct index_state *src_index;
+       struct index_state *src_index;
        struct index_state result;
 };