diff options
Diffstat (limited to 'replace_object.c')
| -rw-r--r-- | replace_object.c | 37 |
1 files changed, 21 insertions, 16 deletions
diff --git a/replace_object.c b/replace_object.c index d0b1548726..0ab2dc1374 100644 --- a/replace_object.c +++ b/replace_object.c @@ -3,8 +3,13 @@ #include "refs.h" #include "commit.h" +/* + * An array of replacements. The array is kept sorted by the original + * sha1. + */ static struct replace_object { - unsigned char sha1[2][20]; + unsigned char original[20]; + unsigned char replacement[20]; } **replace_object; static int replace_object_alloc, replace_object_nr; @@ -12,7 +17,7 @@ static int replace_object_alloc, replace_object_nr; static const unsigned char *replace_sha1_access(size_t index, void *table) { struct replace_object **replace = table; - return replace[index]->sha1[0]; + return replace[index]->original; } static int replace_object_pos(const unsigned char *sha1) @@ -24,7 +29,7 @@ static int replace_object_pos(const unsigned char *sha1) static int register_replace_object(struct replace_object *replace, int ignore_dups) { - int pos = replace_object_pos(replace->sha1[0]); + int pos = replace_object_pos(replace->original); if (0 <= pos) { if (ignore_dups) @@ -36,12 +41,8 @@ static int register_replace_object(struct replace_object *replace, return 1; } pos = -pos - 1; - if (replace_object_alloc <= ++replace_object_nr) { - replace_object_alloc = alloc_nr(replace_object_alloc); - replace_object = xrealloc(replace_object, - sizeof(*replace_object) * - replace_object_alloc); - } + ALLOC_GROW(replace_object, replace_object_nr + 1, replace_object_alloc); + replace_object_nr++; if (pos < replace_object_nr) memmove(replace_object + pos + 1, replace_object + pos, @@ -60,14 +61,14 @@ static int register_replace_ref(const char *refname, const char *hash = slash ? slash + 1 : refname; struct replace_object *repl_obj = xmalloc(sizeof(*repl_obj)); - if (strlen(hash) != 40 || get_sha1_hex(hash, repl_obj->sha1[0])) { + if (strlen(hash) != 40 || get_sha1_hex(hash, repl_obj->original)) { free(repl_obj); warning("bad replace ref name: %s", refname); return 0; } /* Copy sha1 from the read ref */ - hashcpy(repl_obj->sha1[1], sha1); + hashcpy(repl_obj->replacement, sha1); /* Register new object */ if (register_replace_object(repl_obj, 1)) @@ -86,20 +87,24 @@ static void prepare_replace_object(void) for_each_replace_ref(register_replace_ref, NULL); replace_object_prepared = 1; if (!replace_object_nr) - read_replace_refs = 0; + check_replace_refs = 0; } /* We allow "recursive" replacement. Only within reason, though */ #define MAXREPLACEDEPTH 5 +/* + * If a replacement for object sha1 has been set up, return the + * replacement object's name (replaced recursively, if necessary). + * The return value is either sha1 or a pointer to a + * permanently-allocated value. This function always respects replace + * references, regardless of the value of check_replace_refs. + */ const unsigned char *do_lookup_replace_object(const unsigned char *sha1) { int pos, depth = MAXREPLACEDEPTH; const unsigned char *cur = sha1; - if (!read_replace_refs) - return sha1; - prepare_replace_object(); /* Try to recursively replace the object */ @@ -110,7 +115,7 @@ const unsigned char *do_lookup_replace_object(const unsigned char *sha1) pos = replace_object_pos(cur); if (0 <= pos) - cur = replace_object[pos]->sha1[1]; + cur = replace_object[pos]->replacement; } while (0 <= pos); return cur; |