#include "cache.h"
#include "tag.h"
#include "commit.h"
+#include "pkt-line.h"
+#include "utf8.h"
+#include "diff.h"
+#include "revision.h"
int save_commit_buffer = 1;
struct sort_node
{
/*
- * the number of children of the associated commit
- * that also occur in the list being sorted.
- */
+ * the number of children of the associated commit
+ * that also occur in the list being sorted.
+ */
unsigned int indegree;
/*
- * reference to original list item that we will re-use
- * on output.
- */
+ * reference to original list item that we will re-use
+ * on output.
+ */
struct commit_list * list_item;
};
const char *commit_type = "commit";
-struct cmt_fmt_map {
- const char *n;
- size_t cmp_len;
- enum cmit_fmt v;
-} cmt_fmts[] = {
- { "raw", 1, CMIT_FMT_RAW },
- { "medium", 1, CMIT_FMT_MEDIUM },
- { "short", 1, CMIT_FMT_SHORT },
- { "email", 1, CMIT_FMT_EMAIL },
- { "full", 5, CMIT_FMT_FULL },
- { "fuller", 5, CMIT_FMT_FULLER },
- { "oneline", 1, CMIT_FMT_ONELINE },
-};
-
-enum cmit_fmt get_commit_format(const char *arg)
-{
- int i;
-
- if (!arg || !*arg)
- return CMIT_FMT_DEFAULT;
- if (*arg == '=')
- arg++;
- for (i = 0; i < ARRAY_SIZE(cmt_fmts); i++) {
- if (!strncmp(arg, cmt_fmts[i].n, cmt_fmts[i].cmp_len))
- return cmt_fmts[i].v;
- }
-
- die("invalid --pretty format: %s", arg);
-}
-
static struct commit *check_commit(struct object *obj,
const unsigned char *sha1,
int quiet)
{
- if (obj->type != commit_type) {
+ if (obj->type != OBJ_COMMIT) {
if (!quiet)
error("Object %s is a %s, not a commit",
- sha1_to_hex(sha1), obj->type);
+ sha1_to_hex(sha1), typename(obj->type));
return NULL;
}
return (struct commit *) obj;
struct commit *lookup_commit(const unsigned char *sha1)
{
struct object *obj = lookup_object(sha1);
- if (!obj) {
- struct commit *ret = xcalloc(1, sizeof(struct commit));
- created_object(sha1, &ret->object);
- ret->object.type = commit_type;
- return ret;
- }
+ if (!obj)
+ return create_object(sha1, OBJ_COMMIT, alloc_commit_node());
if (!obj->type)
- obj->type = commit_type;
+ obj->type = OBJ_COMMIT;
return check_commit(obj, sha1, 0);
}
while (lo < hi) {
int mi = (lo + hi) / 2;
struct commit_graft *graft = commit_graft[mi];
- int cmp = memcmp(sha1, graft->sha1, 20);
+ int cmp = hashcmp(sha1, graft->sha1);
if (!cmp)
return mi;
if (cmp < 0)
int register_commit_graft(struct commit_graft *graft, int ignore_dups)
{
int pos = commit_graft_pos(graft->sha1);
-
+
if (0 <= pos) {
if (ignore_dups)
free(graft);
return;
graft_file = get_graft_file();
read_graft_file(graft_file);
+ /* make sure shallows are read */
+ is_repository_shallow();
commit_graft_prepared = 1;
}
return commit_graft[pos];
}
+int write_shallow_commits(int fd, int use_pack_protocol)
+{
+ int i, count = 0;
+ for (i = 0; i < commit_graft_nr; i++)
+ if (commit_graft[i]->nr_parent < 0) {
+ const char *hex =
+ sha1_to_hex(commit_graft[i]->sha1);
+ count++;
+ if (use_pack_protocol)
+ packet_write(fd, "shallow %s", hex);
+ else {
+ if (write_in_full(fd, hex, 40) != 40)
+ break;
+ if (write_in_full(fd, "\n", 1) != 1)
+ break;
+ }
+ }
+ return count;
+}
+
+int unregister_shallow(const unsigned char *sha1)
+{
+ int pos = commit_graft_pos(sha1);
+ if (pos < 0)
+ return -1;
+ if (pos + 1 < commit_graft_nr)
+ memcpy(commit_graft + pos, commit_graft + pos + 1,
+ sizeof(struct commit_graft *)
+ * (commit_graft_nr - pos - 1));
+ commit_graft_nr--;
+ return 0;
+}
+
int parse_commit_buffer(struct commit *item, void *buffer, unsigned long size)
{
+ char *tail = buffer;
char *bufptr = buffer;
unsigned char parent[20];
struct commit_list **pptr;
if (item->object.parsed)
return 0;
item->object.parsed = 1;
- if (memcmp(bufptr, "tree ", 5))
+ tail += size;
+ if (tail <= bufptr + 5 || memcmp(bufptr, "tree ", 5))
return error("bogus commit object %s", sha1_to_hex(item->object.sha1));
- if (get_sha1_hex(bufptr + 5, parent) < 0)
+ if (tail <= bufptr + 45 || get_sha1_hex(bufptr + 5, parent) < 0)
return error("bad tree pointer in commit %s",
sha1_to_hex(item->object.sha1));
item->tree = lookup_tree(parent);
pptr = &item->parents;
graft = lookup_commit_graft(item->object.sha1);
- while (!memcmp(bufptr, "parent ", 7)) {
+ while (bufptr + 48 < tail && !memcmp(bufptr, "parent ", 7)) {
struct commit *new_parent;
- if (get_sha1_hex(bufptr + 7, parent) || bufptr[47] != '\n')
+ if (tail <= bufptr + 48 ||
+ get_sha1_hex(bufptr + 7, parent) ||
+ bufptr[47] != '\n')
return error("bad parents in commit %s", sha1_to_hex(item->object.sha1));
bufptr += 48;
if (graft)
int parse_commit(struct commit *item)
{
- char type[20];
+ enum object_type type;
void *buffer;
unsigned long size;
int ret;
if (item->object.parsed)
return 0;
- buffer = read_sha1_file(item->object.sha1, type, &size);
+ buffer = read_sha1_file(item->object.sha1, &type, &size);
if (!buffer)
return error("Could not read %s",
sha1_to_hex(item->object.sha1));
- if (strcmp(type, commit_type)) {
+ if (type != OBJ_COMMIT) {
free(buffer);
return error("Object %s not a commit",
sha1_to_hex(item->object.sha1));
return commit_list_insert(item, pp);
}
-
+
void sort_by_date(struct commit_list **list)
{
struct commit_list *ret = NULL;
void clear_commit_marks(struct commit *commit, unsigned int mark)
{
- struct commit_list *parents;
+ while (commit) {
+ struct commit_list *parents;
- parents = commit->parents;
- commit->object.flags &= ~mark;
- while (parents) {
- struct commit *parent = parents->item;
- if (parent && parent->object.parsed &&
- (parent->object.flags & mark))
- clear_commit_marks(parent, mark);
- parents = parents->next;
- }
-}
+ if (!(mark & commit->object.flags))
+ return;
-/*
- * Generic support for pretty-printing the header
- */
-static int get_one_line(const char *msg, unsigned long len)
-{
- int ret = 0;
+ commit->object.flags &= ~mark;
- while (len--) {
- char c = *msg++;
- if (!c)
- break;
- ret++;
- if (c == '\n')
- break;
- }
- return ret;
-}
+ parents = commit->parents;
+ if (!parents)
+ return;
-static int is_rfc2047_special(char ch)
-{
- return ((ch & 0x80) || (ch == '=') || (ch == '?') || (ch == '_'));
-}
-
-static int add_rfc2047(char *buf, const char *line, int len)
-{
- char *bp = buf;
- int i, needquote;
- static const char q_utf8[] = "=?utf-8?q?";
-
- for (i = needquote = 0; !needquote && i < len; i++) {
- unsigned ch = line[i];
- if (ch & 0x80)
- needquote++;
- if ((i + 1 < len) &&
- (ch == '=' && line[i+1] == '?'))
- needquote++;
- }
- if (!needquote)
- return sprintf(buf, "%.*s", len, line);
-
- memcpy(bp, q_utf8, sizeof(q_utf8)-1);
- bp += sizeof(q_utf8)-1;
- for (i = 0; i < len; i++) {
- unsigned ch = line[i];
- if (is_rfc2047_special(ch)) {
- sprintf(bp, "=%02X", ch);
- bp += 3;
- }
- else if (ch == ' ')
- *bp++ = '_';
- else
- *bp++ = ch;
- }
- memcpy(bp, "?=", 2);
- bp += 2;
- return bp - buf;
-}
-
-static int add_user_info(const char *what, enum cmit_fmt fmt, char *buf, const char *line)
-{
- char *date;
- int namelen;
- unsigned long time;
- int tz, ret;
- const char *filler = " ";
-
- if (fmt == CMIT_FMT_ONELINE)
- return 0;
- date = strchr(line, '>');
- if (!date)
- return 0;
- namelen = ++date - line;
- time = strtoul(date, &date, 10);
- tz = strtol(date, NULL, 10);
-
- if (fmt == CMIT_FMT_EMAIL) {
- char *name_tail = strchr(line, '<');
- int display_name_length;
- if (!name_tail)
- return 0;
- while (line < name_tail && isspace(name_tail[-1]))
- name_tail--;
- display_name_length = name_tail - line;
- filler = "";
- strcpy(buf, "From: ");
- ret = strlen(buf);
- ret += add_rfc2047(buf + ret, line, display_name_length);
- memcpy(buf + ret, name_tail, namelen - display_name_length);
- ret += namelen - display_name_length;
- buf[ret++] = '\n';
- }
- else {
- ret = sprintf(buf, "%s: %.*s%.*s\n", what,
- (fmt == CMIT_FMT_FULLER) ? 4 : 0,
- filler, namelen, line);
- }
- switch (fmt) {
- case CMIT_FMT_MEDIUM:
- ret += sprintf(buf + ret, "Date: %s\n", show_date(time, tz));
- break;
- case CMIT_FMT_EMAIL:
- ret += sprintf(buf + ret, "Date: %s\n",
- show_rfc2822_date(time, tz));
- break;
- case CMIT_FMT_FULLER:
- ret += sprintf(buf + ret, "%sDate: %s\n", what, show_date(time, tz));
- break;
- default:
- /* notin' */
- break;
- }
- return ret;
-}
-
-static int is_empty_line(const char *line, int *len_p)
-{
- int len = *len_p;
- while (len && isspace(line[len-1]))
- len--;
- *len_p = len;
- return !len;
-}
-
-static int add_merge_info(enum cmit_fmt fmt, char *buf, const struct commit *commit, int abbrev)
-{
- struct commit_list *parent = commit->parents;
- int offset;
-
- if ((fmt == CMIT_FMT_ONELINE) || (fmt == CMIT_FMT_EMAIL) ||
- !parent || !parent->next)
- return 0;
-
- offset = sprintf(buf, "Merge:");
-
- while (parent) {
- struct commit *p = parent->item;
- const char *hex = abbrev
- ? find_unique_abbrev(p->object.sha1, abbrev)
- : sha1_to_hex(p->object.sha1);
- char *dots = (abbrev && strlen(hex) != 40) ? "..." : "";
- parent = parent->next;
+ while ((parents = parents->next))
+ clear_commit_marks(parents->item, mark);
- offset += sprintf(buf + offset, " %s%s", hex, dots);
+ commit = commit->parents->item;
}
- buf[offset++] = '\n';
- return offset;
-}
-
-unsigned long pretty_print_commit(enum cmit_fmt fmt, const struct commit *commit, unsigned long len, char *buf, unsigned long space, int abbrev, const char *subject, const char *after_subject)
-{
- int hdr = 1, body = 0;
- unsigned long offset = 0;
- int indent = 4;
- int parents_shown = 0;
- const char *msg = commit->buffer;
- int plain_non_ascii = 0;
-
- if (fmt == CMIT_FMT_ONELINE || fmt == CMIT_FMT_EMAIL)
- indent = 0;
-
- /* After-subject is used to pass in Content-Type: multipart
- * MIME header; in that case we do not have to do the
- * plaintext content type even if the commit message has
- * non 7-bit ASCII character. Otherwise, check if we need
- * to say this is not a 7-bit ASCII.
- */
- if (fmt == CMIT_FMT_EMAIL && !after_subject) {
- int i;
- for (i = 0; !plain_non_ascii && msg[i] && i < len; i++)
- if (msg[i] & 0x80)
- plain_non_ascii = 1;
- }
-
- for (;;) {
- const char *line = msg;
- int linelen = get_one_line(msg, len);
-
- if (!linelen)
- break;
-
- /*
- * We want some slop for indentation and a possible
- * final "...". Thus the "+ 20".
- */
- if (offset + linelen + 20 > space) {
- memcpy(buf + offset, " ...\n", 8);
- offset += 8;
- break;
- }
-
- msg += linelen;
- len -= linelen;
- if (hdr) {
- if (linelen == 1) {
- hdr = 0;
- if ((fmt != CMIT_FMT_ONELINE) && !subject)
- buf[offset++] = '\n';
- continue;
- }
- if (fmt == CMIT_FMT_RAW) {
- memcpy(buf + offset, line, linelen);
- offset += linelen;
- continue;
- }
- if (!memcmp(line, "parent ", 7)) {
- if (linelen != 48)
- die("bad parent line in commit");
- continue;
- }
-
- if (!parents_shown) {
- offset += add_merge_info(fmt, buf + offset,
- commit, abbrev);
- parents_shown = 1;
- continue;
- }
- /*
- * MEDIUM == DEFAULT shows only author with dates.
- * FULL shows both authors but not dates.
- * FULLER shows both authors and dates.
- */
- if (!memcmp(line, "author ", 7))
- offset += add_user_info("Author", fmt,
- buf + offset,
- line + 7);
- if (!memcmp(line, "committer ", 10) &&
- (fmt == CMIT_FMT_FULL || fmt == CMIT_FMT_FULLER))
- offset += add_user_info("Commit", fmt,
- buf + offset,
- line + 10);
- continue;
- }
-
- if (is_empty_line(line, &linelen)) {
- if (!body)
- continue;
- if (subject)
- continue;
- if (fmt == CMIT_FMT_SHORT)
- break;
- } else {
- body = 1;
- }
-
- if (subject) {
- int slen = strlen(subject);
- memcpy(buf + offset, subject, slen);
- offset += slen;
- offset += add_rfc2047(buf + offset, line, linelen);
- }
- else {
- memset(buf + offset, ' ', indent);
- memcpy(buf + offset + indent, line, linelen);
- offset += linelen + indent;
- }
- buf[offset++] = '\n';
- if (fmt == CMIT_FMT_ONELINE)
- break;
- if (subject && plain_non_ascii) {
- static const char header[] =
- "Content-Type: text/plain; charset=UTF-8\n"
- "Content-Transfer-Encoding: 8bit\n";
- memcpy(buf + offset, header, sizeof(header)-1);
- offset += sizeof(header)-1;
- }
- if (after_subject) {
- int slen = strlen(after_subject);
- if (slen > space - offset - 1)
- slen = space - offset - 1;
- memcpy(buf + offset, after_subject, slen);
- offset += slen;
- after_subject = NULL;
- }
- subject = NULL;
- }
- while (offset && isspace(buf[offset-1]))
- offset--;
- /* Make sure there is an EOLN for the non-oneline case */
- if (fmt != CMIT_FMT_ONELINE)
- buf[offset++] = '\n';
- buf[offset] = '\0';
- return offset;
}
struct commit *pop_commit(struct commit_list **stack)
return item;
}
-int count_parents(struct commit * commit)
-{
- int count = 0;
- struct commit_list * parents = commit->parents;
- for (count=0;parents; parents=parents->next,count++)
- ;
- return count;
-}
-
void topo_sort_default_setter(struct commit *c, void *data)
{
- c->object.util = data;
+ c->util = data;
}
void *topo_sort_default_getter(struct commit *c)
{
- return c->object.util;
+ return c->util;
}
/*
next = next->next;
count++;
}
-
+
if (!count)
return;
/* allocate an array to help sort the list */
}
next=next->next;
}
- /*
- * find the tips
- *
- * tips are nodes not reachable from any other node in the list
- *
- * the tips serve as a starting set for the work queue.
- */
+ /*
+ * find the tips
+ *
+ * tips are nodes not reachable from any other node in the list
+ *
+ * the tips serve as a starting set for the work queue.
+ */
next=*list;
insert = &work;
while (next) {
if (pn) {
/*
- * parents are only enqueued for emission
- * when all their children have been emitted thereby
- * guaranteeing topological order.
- */
+ * parents are only enqueued for emission
+ * when all their children have been emitted thereby
+ * guaranteeing topological order.
+ */
pn->indegree--;
if (!pn->indegree) {
if (!lifo)
parents=parents->next;
}
/*
- * work_item is a commit all of whose children
- * have already been emitted. we can emit it now.
- */
+ * work_item is a commit all of whose children
+ * have already been emitted. we can emit it now.
+ */
*pptr = work_node->list_item;
pptr = &(*pptr)->next;
*pptr = NULL;
}
free(nodes);
}
+
+/* merge-base stuff */
+
+/* bits #0..15 in revision.h */
+#define PARENT1 (1u<<16)
+#define PARENT2 (1u<<17)
+#define STALE (1u<<18)
+#define RESULT (1u<<19)
+
+static const unsigned all_flags = (PARENT1 | PARENT2 | STALE | RESULT);
+
+static struct commit *interesting(struct commit_list *list)
+{
+ while (list) {
+ struct commit *commit = list->item;
+ list = list->next;
+ if (commit->object.flags & STALE)
+ continue;
+ return commit;
+ }
+ return NULL;
+}
+
+static struct commit_list *merge_bases(struct commit *one, struct commit *two)
+{
+ struct commit_list *list = NULL;
+ struct commit_list *result = NULL;
+
+ if (one == two)
+ /* We do not mark this even with RESULT so we do not
+ * have to clean it up.
+ */
+ return commit_list_insert(one, &result);
+
+ parse_commit(one);
+ parse_commit(two);
+
+ one->object.flags |= PARENT1;
+ two->object.flags |= PARENT2;
+ insert_by_date(one, &list);
+ insert_by_date(two, &list);
+
+ while (interesting(list)) {
+ struct commit *commit;
+ struct commit_list *parents;
+ struct commit_list *n;
+ int flags;
+
+ commit = list->item;
+ n = list->next;
+ free(list);
+ list = n;
+
+ flags = commit->object.flags & (PARENT1 | PARENT2 | STALE);
+ if (flags == (PARENT1 | PARENT2)) {
+ if (!(commit->object.flags & RESULT)) {
+ commit->object.flags |= RESULT;
+ insert_by_date(commit, &result);
+ }
+ /* Mark parents of a found merge stale */
+ flags |= STALE;
+ }
+ parents = commit->parents;
+ while (parents) {
+ struct commit *p = parents->item;
+ parents = parents->next;
+ if ((p->object.flags & flags) == flags)
+ continue;
+ parse_commit(p);
+ p->object.flags |= flags;
+ insert_by_date(p, &list);
+ }
+ }
+
+ /* Clean up the result to remove stale ones */
+ free_commit_list(list);
+ list = result; result = NULL;
+ while (list) {
+ struct commit_list *n = list->next;
+ if (!(list->item->object.flags & STALE))
+ insert_by_date(list->item, &result);
+ free(list);
+ list = n;
+ }
+ return result;
+}
+
+struct commit_list *get_merge_bases(struct commit *one,
+ struct commit *two, int cleanup)
+{
+ struct commit_list *list;
+ struct commit **rslt;
+ struct commit_list *result;
+ int cnt, i, j;
+
+ result = merge_bases(one, two);
+ if (one == two)
+ return result;
+ if (!result || !result->next) {
+ if (cleanup) {
+ clear_commit_marks(one, all_flags);
+ clear_commit_marks(two, all_flags);
+ }
+ return result;
+ }
+
+ /* There are more than one */
+ cnt = 0;
+ list = result;
+ while (list) {
+ list = list->next;
+ cnt++;
+ }
+ rslt = xcalloc(cnt, sizeof(*rslt));
+ for (list = result, i = 0; list; list = list->next)
+ rslt[i++] = list->item;
+ free_commit_list(result);
+
+ clear_commit_marks(one, all_flags);
+ clear_commit_marks(two, all_flags);
+ for (i = 0; i < cnt - 1; i++) {
+ for (j = i+1; j < cnt; j++) {
+ if (!rslt[i] || !rslt[j])
+ continue;
+ result = merge_bases(rslt[i], rslt[j]);
+ clear_commit_marks(rslt[i], all_flags);
+ clear_commit_marks(rslt[j], all_flags);
+ for (list = result; list; list = list->next) {
+ if (rslt[i] == list->item)
+ rslt[i] = NULL;
+ if (rslt[j] == list->item)
+ rslt[j] = NULL;
+ }
+ }
+ }
+
+ /* Surviving ones in rslt[] are the independent results */
+ result = NULL;
+ for (i = 0; i < cnt; i++) {
+ if (rslt[i])
+ insert_by_date(rslt[i], &result);
+ }
+ free(rslt);
+ return result;
+}
+
+int in_merge_bases(struct commit *commit, struct commit **reference, int num)
+{
+ struct commit_list *bases, *b;
+ int ret = 0;
+
+ if (num == 1)
+ bases = get_merge_bases(commit, *reference, 1);
+ else
+ die("not yet");
+ for (b = bases; b; b = b->next) {
+ if (!hashcmp(commit->object.sha1, b->item->object.sha1)) {
+ ret = 1;
+ break;
+ }
+ }
+
+ free_commit_list(bases);
+ return ret;
+}