5289bae17f
instead of the specific one from which the new one has been copied. Signed-off-by: Christian Couder <chriscool@tuxfamily.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
110 lines
2.5 KiB
C
110 lines
2.5 KiB
C
#include "cache.h"
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#include "diff.h"
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#include "commit.h"
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#include "sha1-lookup.h"
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#include "patch-ids.h"
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static int commit_patch_id(struct commit *commit, struct diff_options *options,
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unsigned char *sha1)
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{
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if (commit->parents)
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diff_tree_sha1(commit->parents->item->object.sha1,
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commit->object.sha1, "", options);
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else
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diff_root_tree_sha1(commit->object.sha1, "", options);
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diffcore_std(options);
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return diff_flush_patch_id(options, sha1);
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}
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static const unsigned char *patch_id_access(size_t index, void *table)
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{
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struct patch_id **id_table = table;
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return id_table[index]->patch_id;
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}
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static int patch_pos(struct patch_id **table, int nr, const unsigned char *id)
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{
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return sha1_pos(id, table, nr, patch_id_access);
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}
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#define BUCKET_SIZE 190 /* 190 * 21 = 3990, with slop close enough to 4K */
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struct patch_id_bucket {
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struct patch_id_bucket *next;
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int nr;
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struct patch_id bucket[BUCKET_SIZE];
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};
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int init_patch_ids(struct patch_ids *ids)
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{
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memset(ids, 0, sizeof(*ids));
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diff_setup(&ids->diffopts);
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DIFF_OPT_SET(&ids->diffopts, RECURSIVE);
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if (diff_setup_done(&ids->diffopts) < 0)
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return error("diff_setup_done failed");
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return 0;
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}
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int free_patch_ids(struct patch_ids *ids)
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{
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struct patch_id_bucket *next, *patches;
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free(ids->table);
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for (patches = ids->patches; patches; patches = next) {
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next = patches->next;
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free(patches);
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}
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return 0;
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}
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static struct patch_id *add_commit(struct commit *commit,
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struct patch_ids *ids,
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int no_add)
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{
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struct patch_id_bucket *bucket;
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struct patch_id *ent;
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unsigned char sha1[20];
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int pos;
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if (commit_patch_id(commit, &ids->diffopts, sha1))
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return NULL;
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pos = patch_pos(ids->table, ids->nr, sha1);
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if (0 <= pos)
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return ids->table[pos];
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if (no_add)
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return NULL;
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pos = -1 - pos;
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bucket = ids->patches;
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if (!bucket || (BUCKET_SIZE <= bucket->nr)) {
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bucket = xcalloc(1, sizeof(*bucket));
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bucket->next = ids->patches;
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ids->patches = bucket;
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}
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ent = &bucket->bucket[bucket->nr++];
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hashcpy(ent->patch_id, sha1);
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if (ids->alloc <= ids->nr) {
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ids->alloc = alloc_nr(ids->nr);
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ids->table = xrealloc(ids->table, sizeof(ent) * ids->alloc);
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}
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if (pos < ids->nr)
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memmove(ids->table + pos + 1, ids->table + pos,
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sizeof(ent) * (ids->nr - pos));
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ids->nr++;
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ids->table[pos] = ent;
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return ids->table[pos];
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}
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struct patch_id *has_commit_patch_id(struct commit *commit,
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struct patch_ids *ids)
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{
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return add_commit(commit, ids, 1);
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}
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struct patch_id *add_commit_patch_id(struct commit *commit,
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struct patch_ids *ids)
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{
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return add_commit(commit, ids, 0);
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}
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