diff options
Diffstat (limited to 'src/commit_list.c')
| -rw-r--r-- | src/commit_list.c | 190 |
1 files changed, 190 insertions, 0 deletions
diff --git a/src/commit_list.c b/src/commit_list.c new file mode 100644 index 000000000..c1a7b223f --- /dev/null +++ b/src/commit_list.c @@ -0,0 +1,190 @@ +/* + * Copyright (C) 2009-2012 the libgit2 contributors + * + * This file is part of libgit2, distributed under the GNU GPL v2 with + * a Linking Exception. For full terms see the included COPYING file. + */ + +#include "commit_list.h" +#include "common.h" +#include "revwalk.h" +#include "pool.h" +#include "odb.h" + +int git_commit_list_time_cmp(void *a, void *b) +{ + git_commit_list_node *commit_a = (git_commit_list_node *)a; + git_commit_list_node *commit_b = (git_commit_list_node *)b; + + return (commit_a->time < commit_b->time); +} + +git_commit_list *git_commit_list_insert(git_commit_list_node *item, git_commit_list **list_p) +{ + git_commit_list *new_list = git__malloc(sizeof(git_commit_list)); + if (new_list != NULL) { + new_list->item = item; + new_list->next = *list_p; + } + *list_p = new_list; + return new_list; +} + +git_commit_list *git_commit_list_insert_by_date(git_commit_list_node *item, git_commit_list **list_p) +{ + git_commit_list **pp = list_p; + git_commit_list *p; + + while ((p = *pp) != NULL) { + if (git_commit_list_time_cmp(p->item, item) < 0) + break; + + pp = &p->next; + } + + return git_commit_list_insert(item, pp); +} + +git_commit_list_node *git_commit_list_alloc_node(git_revwalk *walk) +{ + return (git_commit_list_node *)git_pool_malloc(&walk->commit_pool, COMMIT_ALLOC); +} + +static int commit_error(git_commit_list_node *commit, const char *msg) +{ + char commit_oid[GIT_OID_HEXSZ + 1]; + git_oid_fmt(commit_oid, &commit->oid); + commit_oid[GIT_OID_HEXSZ] = '\0'; + + giterr_set(GITERR_ODB, "Failed to parse commit %s - %s", commit_oid, msg); + + return -1; +} + +static git_commit_list_node **alloc_parents( + git_revwalk *walk, git_commit_list_node *commit, size_t n_parents) +{ + if (n_parents <= PARENTS_PER_COMMIT) + return (git_commit_list_node **)((char *)commit + sizeof(git_commit_list_node)); + + return (git_commit_list_node **)git_pool_malloc( + &walk->commit_pool, (uint32_t)(n_parents * sizeof(git_commit_list_node *))); +} + + +void git_commit_list_free(git_commit_list **list_p) +{ + git_commit_list *list = *list_p; + + if (list == NULL) + return; + + while (list) { + git_commit_list *temp = list; + list = temp->next; + git__free(temp); + } + + *list_p = NULL; +} + +git_commit_list_node *git_commit_list_pop(git_commit_list **stack) +{ + git_commit_list *top = *stack; + git_commit_list_node *item = top ? top->item : NULL; + + if (top) { + *stack = top->next; + git__free(top); + } + return item; +} + +static int commit_quick_parse(git_revwalk *walk, git_commit_list_node *commit, git_rawobj *raw) +{ + const size_t parent_len = strlen("parent ") + GIT_OID_HEXSZ + 1; + unsigned char *buffer = raw->data; + unsigned char *buffer_end = buffer + raw->len; + unsigned char *parents_start, *committer_start; + int i, parents = 0; + int commit_time; + + buffer += strlen("tree ") + GIT_OID_HEXSZ + 1; + + parents_start = buffer; + while (buffer + parent_len < buffer_end && memcmp(buffer, "parent ", strlen("parent ")) == 0) { + parents++; + buffer += parent_len; + } + + commit->parents = alloc_parents(walk, commit, parents); + GITERR_CHECK_ALLOC(commit->parents); + + buffer = parents_start; + for (i = 0; i < parents; ++i) { + git_oid oid; + + if (git_oid_fromstr(&oid, (char *)buffer + strlen("parent ")) < 0) + return -1; + + commit->parents[i] = commit_lookup(walk, &oid); + if (commit->parents[i] == NULL) + return -1; + + buffer += parent_len; + } + + commit->out_degree = (unsigned short)parents; + + if ((committer_start = buffer = memchr(buffer, '\n', buffer_end - buffer)) == NULL) + return commit_error(commit, "object is corrupted"); + + buffer++; + + if ((buffer = memchr(buffer, '\n', buffer_end - buffer)) == NULL) + return commit_error(commit, "object is corrupted"); + + /* Skip trailing spaces */ + while (buffer > committer_start && git__isspace(*buffer)) + buffer--; + + /* Seek for the begining of the pack of digits */ + while (buffer > committer_start && git__isdigit(*buffer)) + buffer--; + + /* Skip potential timezone offset */ + if ((buffer > committer_start) && (*buffer == '+' || *buffer == '-')) { + buffer--; + + while (buffer > committer_start && git__isspace(*buffer)) + buffer--; + + while (buffer > committer_start && git__isdigit(*buffer)) + buffer--; + } + + if ((buffer == committer_start) || (git__strtol32(&commit_time, (char *)(buffer + 1), NULL, 10) < 0)) + return commit_error(commit, "cannot parse commit time"); + + commit->time = (time_t)commit_time; + commit->parsed = 1; + return 0; +} + +int git_commit_list_parse(git_revwalk *walk, git_commit_list_node *commit) +{ + git_odb_object *obj; + int error; + + if (commit->parsed) + return 0; + + if ((error = git_odb_read(&obj, walk->odb, &commit->oid)) < 0) + return error; + assert(obj->raw.type == GIT_OBJ_COMMIT); + + error = commit_quick_parse(walk, commit, &obj->raw); + git_odb_object_free(obj); + return error; +} + |