diff options
Diffstat (limited to 'replace_object.c')
-rw-r--r-- | replace_object.c | 120 |
1 files changed, 0 insertions, 120 deletions
diff --git a/replace_object.c b/replace_object.c deleted file mode 100644 index 3e49965d05..0000000000 --- a/replace_object.c +++ /dev/null @@ -1,120 +0,0 @@ -#include "cache.h" -#include "sha1-lookup.h" -#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 original[20]; - unsigned char replacement[20]; -} **replace_object; - -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]->original; -} - -static int replace_object_pos(const unsigned char *sha1) -{ - return sha1_pos(sha1, replace_object, replace_object_nr, - replace_sha1_access); -} - -static int register_replace_object(struct replace_object *replace, - int ignore_dups) -{ - int pos = replace_object_pos(replace->original); - - if (0 <= pos) { - if (ignore_dups) - free(replace); - else { - free(replace_object[pos]); - replace_object[pos] = replace; - } - return 1; - } - pos = -pos - 1; - ALLOC_GROW(replace_object, replace_object_nr + 1, replace_object_alloc); - replace_object_nr++; - if (pos < replace_object_nr) - MOVE_ARRAY(replace_object + pos + 1, replace_object + pos, - replace_object_nr - pos - 1); - replace_object[pos] = replace; - return 0; -} - -static int register_replace_ref(const char *refname, - const struct object_id *oid, - int flag, void *cb_data) -{ - /* Get sha1 from refname */ - const char *slash = strrchr(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->original)) { - free(repl_obj); - warning("bad replace ref name: %s", refname); - return 0; - } - - /* Copy sha1 from the read ref */ - hashcpy(repl_obj->replacement, oid->hash); - - /* Register new object */ - if (register_replace_object(repl_obj, 1)) - die("duplicate replace ref: %s", refname); - - return 0; -} - -static void prepare_replace_object(void) -{ - static int replace_object_prepared; - - if (replace_object_prepared) - return; - - for_each_replace_ref(register_replace_ref, NULL); - replace_object_prepared = 1; - if (!replace_object_nr) - 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; - - prepare_replace_object(); - - /* Try to recursively replace the object */ - do { - if (--depth < 0) - die("replace depth too high for object %s", - sha1_to_hex(sha1)); - - pos = replace_object_pos(cur); - if (0 <= pos) - cur = replace_object[pos]->replacement; - } while (0 <= pos); - - return cur; -} |