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authorJunio C Hamano <gitster@pobox.com>2018-10-30 06:43:42 (GMT)
committerJunio C Hamano <gitster@pobox.com>2018-10-30 06:43:42 (GMT)
commitd829d491eebddc2eefcaa9279ac4b67c7eefbd52 (patch)
treecb639ce3f677d995b42a3537d00ee74b8b4797c6 /apply.c
parent7dc3e5a3be73cf0cbb5f3af6d8e3bb10c70cca3e (diff)
parent0d7c419a94b7524ac854d5a6002b7541abab4f12 (diff)
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Merge branch 'bc/hash-transition-part-15'
More codepaths are moving away from hardcoded hash sizes. * bc/hash-transition-part-15: rerere: convert to use the_hash_algo submodule: make zero-oid comparison hash function agnostic apply: rename new_sha1_prefix and old_sha1_prefix apply: replace hard-coded constants tag: express constant in terms of the_hash_algo transport: use parse_oid_hex instead of a constant upload-pack: express constants in terms of the_hash_algo refs/packed-backend: express constants using the_hash_algo packfile: express constants in terms of the_hash_algo pack-revindex: express constants in terms of the_hash_algo builtin/fetch-pack: remove constants with parse_oid_hex builtin/mktree: remove hard-coded constant builtin/repack: replace hard-coded constants pack-bitmap-write: use GIT_MAX_RAWSZ for allocation object_id.cocci: match only expressions of type 'struct object_id'
Diffstat (limited to 'apply.c')
-rw-r--r--apply.c50
1 files changed, 26 insertions, 24 deletions
diff --git a/apply.c b/apply.c
index fdae1d4..073d5f0 100644
--- a/apply.c
+++ b/apply.c
@@ -223,8 +223,8 @@ struct patch {
struct fragment *fragments;
char *result;
size_t resultsize;
- char old_sha1_prefix[41];
- char new_sha1_prefix[41];
+ char old_oid_prefix[GIT_MAX_HEXSZ + 1];
+ char new_oid_prefix[GIT_MAX_HEXSZ + 1];
struct patch *next;
/* three-way fallback result */
@@ -1093,13 +1093,14 @@ static int gitdiff_index(struct apply_state *state,
*/
const char *ptr, *eol;
int len;
+ const unsigned hexsz = the_hash_algo->hexsz;
ptr = strchr(line, '.');
- if (!ptr || ptr[1] != '.' || 40 < ptr - line)
+ if (!ptr || ptr[1] != '.' || hexsz < ptr - line)
return 0;
len = ptr - line;
- memcpy(patch->old_sha1_prefix, line, len);
- patch->old_sha1_prefix[len] = 0;
+ memcpy(patch->old_oid_prefix, line, len);
+ patch->old_oid_prefix[len] = 0;
line = ptr + 2;
ptr = strchr(line, ' ');
@@ -1109,10 +1110,10 @@ static int gitdiff_index(struct apply_state *state,
ptr = eol;
len = ptr - line;
- if (40 < len)
+ if (hexsz < len)
return 0;
- memcpy(patch->new_sha1_prefix, line, len);
- patch->new_sha1_prefix[len] = 0;
+ memcpy(patch->new_oid_prefix, line, len);
+ patch->new_oid_prefix[len] = 0;
if (*ptr == ' ')
return gitdiff_oldmode(state, ptr + 1, patch);
return 0;
@@ -2206,7 +2207,7 @@ static void reverse_patches(struct patch *p)
SWAP(p->new_mode, p->old_mode);
SWAP(p->is_new, p->is_delete);
SWAP(p->lines_added, p->lines_deleted);
- SWAP(p->old_sha1_prefix, p->new_sha1_prefix);
+ SWAP(p->old_oid_prefix, p->new_oid_prefix);
for (; frag; frag = frag->next) {
SWAP(frag->newpos, frag->oldpos);
@@ -3144,15 +3145,16 @@ static int apply_binary(struct apply_state *state,
{
const char *name = patch->old_name ? patch->old_name : patch->new_name;
struct object_id oid;
+ const unsigned hexsz = the_hash_algo->hexsz;
/*
* For safety, we require patch index line to contain
- * full 40-byte textual SHA1 for old and new, at least for now.
+ * full hex textual object ID for old and new, at least for now.
*/
- if (strlen(patch->old_sha1_prefix) != 40 ||
- strlen(patch->new_sha1_prefix) != 40 ||
- get_oid_hex(patch->old_sha1_prefix, &oid) ||
- get_oid_hex(patch->new_sha1_prefix, &oid))
+ if (strlen(patch->old_oid_prefix) != hexsz ||
+ strlen(patch->new_oid_prefix) != hexsz ||
+ get_oid_hex(patch->old_oid_prefix, &oid) ||
+ get_oid_hex(patch->new_oid_prefix, &oid))
return error(_("cannot apply binary patch to '%s' "
"without full index line"), name);
@@ -3162,7 +3164,7 @@ static int apply_binary(struct apply_state *state,
* applies to.
*/
hash_object_file(img->buf, img->len, blob_type, &oid);
- if (strcmp(oid_to_hex(&oid), patch->old_sha1_prefix))
+ if (strcmp(oid_to_hex(&oid), patch->old_oid_prefix))
return error(_("the patch applies to '%s' (%s), "
"which does not match the "
"current contents."),
@@ -3175,7 +3177,7 @@ static int apply_binary(struct apply_state *state,
"'%s' but it is not empty"), name);
}
- get_oid_hex(patch->new_sha1_prefix, &oid);
+ get_oid_hex(patch->new_oid_prefix, &oid);
if (is_null_oid(&oid)) {
clear_image(img);
return 0; /* deletion patch */
@@ -3191,7 +3193,7 @@ static int apply_binary(struct apply_state *state,
if (!result)
return error(_("the necessary postimage %s for "
"'%s' cannot be read"),
- patch->new_sha1_prefix, name);
+ patch->new_oid_prefix, name);
clear_image(img);
img->buf = result;
img->len = size;
@@ -3207,9 +3209,9 @@ static int apply_binary(struct apply_state *state,
/* verify that the result matches */
hash_object_file(img->buf, img->len, blob_type, &oid);
- if (strcmp(oid_to_hex(&oid), patch->new_sha1_prefix))
+ if (strcmp(oid_to_hex(&oid), patch->new_oid_prefix))
return error(_("binary patch to '%s' creates incorrect result (expecting %s, got %s)"),
- name, patch->new_sha1_prefix, oid_to_hex(&oid));
+ name, patch->new_oid_prefix, oid_to_hex(&oid));
}
return 0;
@@ -3568,7 +3570,7 @@ static int try_threeway(struct apply_state *state,
/* Preimage the patch was prepared for */
if (patch->is_new)
write_object_file("", 0, blob_type, &pre_oid);
- else if (get_oid(patch->old_sha1_prefix, &pre_oid) ||
+ else if (get_oid(patch->old_oid_prefix, &pre_oid) ||
read_blob_object(&buf, &pre_oid, patch->old_mode))
return error(_("repository lacks the necessary blob to fall back on 3-way merge."));
@@ -4060,13 +4062,13 @@ static int preimage_oid_in_gitlink_patch(struct patch *p, struct object_id *oid)
starts_with(++preimage, heading) &&
/* does it record full SHA-1? */
!get_oid_hex(preimage + sizeof(heading) - 1, oid) &&
- preimage[sizeof(heading) + GIT_SHA1_HEXSZ - 1] == '\n' &&
+ preimage[sizeof(heading) + the_hash_algo->hexsz - 1] == '\n' &&
/* does the abbreviated name on the index line agree with it? */
- starts_with(preimage + sizeof(heading) - 1, p->old_sha1_prefix))
+ starts_with(preimage + sizeof(heading) - 1, p->old_oid_prefix))
return 0; /* it all looks fine */
/* we may have full object name on the index line */
- return get_oid_hex(p->old_sha1_prefix, oid);
+ return get_oid_hex(p->old_oid_prefix, oid);
}
/* Build an index that contains just the files needed for a 3way merge */
@@ -4095,7 +4097,7 @@ static int build_fake_ancestor(struct apply_state *state, struct patch *list)
else
return error(_("sha1 information is lacking or "
"useless for submodule %s"), name);
- } else if (!get_oid_blob(patch->old_sha1_prefix, &oid)) {
+ } else if (!get_oid_blob(patch->old_oid_prefix, &oid)) {
; /* ok */
} else if (!patch->lines_added && !patch->lines_deleted) {
/* mode-only change: update the current */