#include "git2/common.h"

#include "git2/object.h"

#include "git2/repository.h"

#include "git2/signature.h"

#include "common.h"

#include "odb.h"

#include "commit.h"

#include "signature.h"

#include "message.h"

#include <stdarg.h>

static void clear_parents(git_commit *commit)

{

size_t i;

for (i = 0; i < commit->parent_ids.length; ++i) {

git_oid *parent = git_vector_get(&commit->parent_ids, i);

git__free(parent);

}

git_vector_clear(&commit->parent_ids);

}

void git_commit__free(git_commit *commit)

{

clear_parents(commit);

git_vector_free(&commit->parent_ids);

git_signature_free(commit->author);

git_signature_free(commit->committer);

git__free(commit->message);

git__free(commit->message_encoding);

git__free(commit);

}

int git_commit_create_v(

...)

{

va_list ap;

int i, res;

const git_commit **parents;

parents = git__malloc(parent_count * sizeof(git_commit *));

GITERR_CHECK_ALLOC(parents);

va_start(ap, parent_count);

for (i = 0; i < parent_count; ++i)

parents[i] = va_arg(ap, const git_commit *);

va_end(ap);

res = git_commit_create(

oid, repo, update_ref, author, committer,

message_encoding, message,

tree, parent_count, parents);

git__free((void *)parents);

return res;

}

int git_commit_create(

const git_commit *parents[])

{

git_buf commit = GIT_BUF_INIT;

int i;

git_odb *odb;

assert(git_object_owner((const git_object *)tree) == repo);

git_oid__writebuf(&commit, "tree ", git_object_id((const git_object *)tree));

for (i = 0; i < parent_count; ++i) {

assert(git_object_owner((const git_object *)parents[i]) == repo);

git_oid__writebuf(&commit, "parent ", git_object_id((const git_object *)parents[i]));

}

git_signature__writebuf(&commit, "author ", author);

git_signature__writebuf(&commit, "committer ", committer);

if (message_encoding != NULL)

git_buf_printf(&commit, "encoding %s\n", message_encoding);

git_buf_putc(&commit, '\n');

if (git_buf_puts(&commit, message) < 0)

goto on_error;

if (git_repository_odb__weakptr(&odb, repo) < 0)

goto on_error;

if (git_odb_write(oid, odb, commit.ptr, commit.size, GIT_OBJ_COMMIT) < 0)

goto on_error;

git_buf_free(&commit);

if (update_ref != NULL)

return git_reference__update_terminal(repo, update_ref, oid);

return 0;

on_error:

git_buf_free(&commit);

giterr_set(GITERR_OBJECT, "Failed to create commit.");

return -1;

}

int git_commit__parse_buffer(git_commit *commit, const void *data, size_t len)

{

const char *buffer = data;

const char *buffer_end = (const char *)data + len;

git_oid parent_id;

if (git_vector_init(&commit->parent_ids, 4, NULL) < 0)

return -1;

if (git_oid__parse(&commit->tree_id, &buffer, buffer_end, "tree ") < 0)

goto bad_buffer;

/*

while (git_oid__parse(&parent_id, &buffer, buffer_end, "parent ") == 0) {

git_oid *new_id = git__malloc(sizeof(git_oid));

GITERR_CHECK_ALLOC(new_id);

git_oid_cpy(new_id, &parent_id);

if (git_vector_insert(&commit->parent_ids, new_id) < 0)

return -1;

}

commit->author = git__malloc(sizeof(git_signature));

GITERR_CHECK_ALLOC(commit->author);

if (git_signature__parse(commit->author, &buffer, buffer_end, "author ", '\n') < 0)

return -1;

/* Always parse the committer; we need the commit time */

commit->committer = git__malloc(sizeof(git_signature));

GITERR_CHECK_ALLOC(commit->committer);

if (git_signature__parse(commit->committer, &buffer, buffer_end, "committer ", '\n') < 0)

return -1;

/* Parse add'l header entries until blank line found */

while (buffer < buffer_end && *buffer != '\n') {

const char *eoln = buffer;

while (eoln < buffer_end && *eoln != '\n')

++eoln;

if (git__prefixcmp(buffer, "encoding ") == 0) {

buffer += strlen("encoding ");

commit->message_encoding = git__strndup(buffer, eoln - buffer);

GITERR_CHECK_ALLOC(commit->message_encoding);

}

if (eoln < buffer_end && *eoln == '\n')

++eoln;

buffer = eoln;

}

/* skip blank lines */

while (buffer < buffer_end - 1 && *buffer == '\n')

buffer++;

/* parse commit message */

if (buffer <= buffer_end) {

commit->message = git__strndup(buffer, buffer_end - buffer);

GITERR_CHECK_ALLOC(commit->message);

}

return 0;

bad_buffer:

giterr_set(GITERR_OBJECT, "Failed to parse bad commit object");

return -1;

}

int git_commit__parse(git_commit *commit, git_odb_object *obj)

{

assert(commit);

return git_commit__parse_buffer(commit, obj->raw.data, obj->raw.len);

}

#define GIT_COMMIT_GETTER(_rvalue, _name, _return) \

_rvalue git_commit_##_name(const git_commit *commit) \

{\

assert(commit); \

return _return; \

}

GIT_COMMIT_GETTER(const git_signature *, author, commit->author)

GIT_COMMIT_GETTER(const git_signature *, committer, commit->committer)

GIT_COMMIT_GETTER(const git_oid *, tree_id, &commit->tree_id);

int git_commit_tree(git_tree **tree_out, const git_commit *commit)

{

assert(commit);

return git_tree_lookup(tree_out, commit->object.repo, &commit->tree_id);

}

const git_oid *git_commit_parent_id(git_commit *commit, unsigned int n)

{

assert(commit);

return git_vector_get(&commit->parent_ids, n);

}

int git_commit_parent(git_commit **parent, git_commit *commit, unsigned int n)

{

const git_oid *parent_id;

assert(commit);

parent_id = git_commit_parent_id(commit, n);

if (parent_id == NULL) {

giterr_set(GITERR_INVALID, "Parent %u does not exist", n);

return GIT_ENOTFOUND;

}

return git_commit_lookup(parent, commit->object.repo, parent_id);

}

int git_commit_nth_gen_ancestor(

git_commit **ancestor,

const git_commit *commit,

unsigned int n)

{

git_commit *current, *parent;

int error;

assert(ancestor && commit);

current = (git_commit *)commit;

if (n == 0)

return git_commit_lookup(

ancestor,

commit->object.repo,

git_object_id((const git_object *)commit));

while (n--) {

error = git_commit_parent(&parent, (git_commit *)current, 0);

if (current != commit)

git_commit_free(current);

if (error < 0)

return error;

current = parent;

}

*ancestor = parent;

return 0;

}