Junio C Hamano | 5d23e13 | 2007-04-09 17:01:27 -0700 | [diff] [blame] | 1 | #include "cache.h" |
| 2 | #include "diff.h" |
| 3 | #include "commit.h" |
Christian Couder | 5289bae | 2009-04-04 22:59:31 +0200 | [diff] [blame] | 4 | #include "sha1-lookup.h" |
Junio C Hamano | 5d23e13 | 2007-04-09 17:01:27 -0700 | [diff] [blame] | 5 | #include "patch-ids.h" |
| 6 | |
| 7 | static int commit_patch_id(struct commit *commit, struct diff_options *options, |
| 8 | unsigned char *sha1) |
| 9 | { |
| 10 | if (commit->parents) |
| 11 | diff_tree_sha1(commit->parents->item->object.sha1, |
| 12 | commit->object.sha1, "", options); |
| 13 | else |
| 14 | diff_root_tree_sha1(commit->object.sha1, "", options); |
| 15 | diffcore_std(options); |
| 16 | return diff_flush_patch_id(options, sha1); |
| 17 | } |
| 18 | |
Christian Couder | 5289bae | 2009-04-04 22:59:31 +0200 | [diff] [blame] | 19 | static const unsigned char *patch_id_access(size_t index, void *table) |
Junio C Hamano | 5d23e13 | 2007-04-09 17:01:27 -0700 | [diff] [blame] | 20 | { |
Christian Couder | 5289bae | 2009-04-04 22:59:31 +0200 | [diff] [blame] | 21 | struct patch_id **id_table = table; |
| 22 | return id_table[index]->patch_id; |
Junio C Hamano | 5d23e13 | 2007-04-09 17:01:27 -0700 | [diff] [blame] | 23 | } |
| 24 | |
Junio C Hamano | 5d23e13 | 2007-04-09 17:01:27 -0700 | [diff] [blame] | 25 | static int patch_pos(struct patch_id **table, int nr, const unsigned char *id) |
| 26 | { |
Christian Couder | 5289bae | 2009-04-04 22:59:31 +0200 | [diff] [blame] | 27 | return sha1_pos(id, table, nr, patch_id_access); |
Junio C Hamano | 5d23e13 | 2007-04-09 17:01:27 -0700 | [diff] [blame] | 28 | } |
| 29 | |
| 30 | #define BUCKET_SIZE 190 /* 190 * 21 = 3990, with slop close enough to 4K */ |
| 31 | struct patch_id_bucket { |
| 32 | struct patch_id_bucket *next; |
| 33 | int nr; |
| 34 | struct patch_id bucket[BUCKET_SIZE]; |
| 35 | }; |
| 36 | |
| 37 | int init_patch_ids(struct patch_ids *ids) |
| 38 | { |
| 39 | memset(ids, 0, sizeof(*ids)); |
| 40 | diff_setup(&ids->diffopts); |
Pierre Habouzit | 8f67f8a | 2007-11-10 20:05:14 +0100 | [diff] [blame] | 41 | DIFF_OPT_SET(&ids->diffopts, RECURSIVE); |
Junio C Hamano | 5d23e13 | 2007-04-09 17:01:27 -0700 | [diff] [blame] | 42 | if (diff_setup_done(&ids->diffopts) < 0) |
| 43 | return error("diff_setup_done failed"); |
| 44 | return 0; |
| 45 | } |
| 46 | |
| 47 | int free_patch_ids(struct patch_ids *ids) |
| 48 | { |
| 49 | struct patch_id_bucket *next, *patches; |
| 50 | |
| 51 | free(ids->table); |
| 52 | for (patches = ids->patches; patches; patches = next) { |
| 53 | next = patches->next; |
| 54 | free(patches); |
| 55 | } |
| 56 | return 0; |
| 57 | } |
| 58 | |
| 59 | static struct patch_id *add_commit(struct commit *commit, |
| 60 | struct patch_ids *ids, |
| 61 | int no_add) |
| 62 | { |
| 63 | struct patch_id_bucket *bucket; |
| 64 | struct patch_id *ent; |
| 65 | unsigned char sha1[20]; |
| 66 | int pos; |
| 67 | |
| 68 | if (commit_patch_id(commit, &ids->diffopts, sha1)) |
| 69 | return NULL; |
| 70 | pos = patch_pos(ids->table, ids->nr, sha1); |
| 71 | if (0 <= pos) |
| 72 | return ids->table[pos]; |
| 73 | if (no_add) |
| 74 | return NULL; |
| 75 | |
| 76 | pos = -1 - pos; |
| 77 | |
| 78 | bucket = ids->patches; |
| 79 | if (!bucket || (BUCKET_SIZE <= bucket->nr)) { |
| 80 | bucket = xcalloc(1, sizeof(*bucket)); |
| 81 | bucket->next = ids->patches; |
| 82 | ids->patches = bucket; |
| 83 | } |
| 84 | ent = &bucket->bucket[bucket->nr++]; |
| 85 | hashcpy(ent->patch_id, sha1); |
| 86 | |
| 87 | if (ids->alloc <= ids->nr) { |
| 88 | ids->alloc = alloc_nr(ids->nr); |
| 89 | ids->table = xrealloc(ids->table, sizeof(ent) * ids->alloc); |
| 90 | } |
| 91 | if (pos < ids->nr) |
| 92 | memmove(ids->table + pos + 1, ids->table + pos, |
| 93 | sizeof(ent) * (ids->nr - pos)); |
| 94 | ids->nr++; |
| 95 | ids->table[pos] = ent; |
| 96 | return ids->table[pos]; |
| 97 | } |
| 98 | |
| 99 | struct patch_id *has_commit_patch_id(struct commit *commit, |
| 100 | struct patch_ids *ids) |
| 101 | { |
| 102 | return add_commit(commit, ids, 1); |
| 103 | } |
| 104 | |
| 105 | struct patch_id *add_commit_patch_id(struct commit *commit, |
| 106 | struct patch_ids *ids) |
| 107 | { |
| 108 | return add_commit(commit, ids, 0); |
| 109 | } |