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git/commit.c
Eric Wong 14763e7bda commit: fix a segfault when displaying a commit with unreachable parents 
I was running git show on various commits found by fsck-objects
when I found this bug.  Since find_unique_abbrev() cannot find
an abbreviation for an object not in the database, it will
return NULL, which is bad to run strlen() on.  So instead, we'll
just display the unabbreviated sha1 that we referenced in the
commit.

I'm not sure that this is the best 'fix' for it because the
commit I was trying to show was broken, but I don't think a
program should segfault even if the user tries to do something
stupid.

Signed-off-by: Eric Wong <normalperson@yhbt.net>
Signed-off-by: Junio C Hamano <junkio@cox.net>
2006-10-11 18:10:38 -07:00

1012 lines
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#include "cache.h"
#include "tag.h"
#include "commit.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.
*/
unsigned int indegree;
/*
* 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 != OBJ_COMMIT) {
if (!quiet)
error("Object %s is a %s, not a commit",
sha1_to_hex(sha1), typename(obj->type));
return NULL;
}
return (struct commit *) obj;
}
struct commit *lookup_commit_reference_gently(const unsigned char *sha1,
int quiet)
{
struct object *obj = deref_tag(parse_object(sha1), NULL, 0);
if (!obj)
return NULL;
return check_commit(obj, sha1, quiet);
}
struct commit *lookup_commit_reference(const unsigned char *sha1)
{
return lookup_commit_reference_gently(sha1, 0);
}
struct commit *lookup_commit(const unsigned char *sha1)
{
struct object *obj = lookup_object(sha1);
if (!obj) {
struct commit *ret = alloc_commit_node();
created_object(sha1, &ret->object);
ret->object.type = OBJ_COMMIT;
return ret;
}
if (!obj->type)
obj->type = OBJ_COMMIT;
return check_commit(obj, sha1, 0);
}
static unsigned long parse_commit_date(const char *buf)
{
unsigned long date;
if (memcmp(buf, "author", 6))
return 0;
while (*buf++ != '\n')
/* nada */;
if (memcmp(buf, "committer", 9))
return 0;
while (*buf++ != '>')
/* nada */;
date = strtoul(buf, NULL, 10);
if (date == ULONG_MAX)
date = 0;
return date;
}
static struct commit_graft **commit_graft;
static int commit_graft_alloc, commit_graft_nr;
static int commit_graft_pos(const unsigned char *sha1)
{
int lo, hi;
lo = 0;
hi = commit_graft_nr;
while (lo < hi) {
int mi = (lo + hi) / 2;
struct commit_graft *graft = commit_graft[mi];
int cmp = hashcmp(sha1, graft->sha1);
if (!cmp)
return mi;
if (cmp < 0)
hi = mi;
else
lo = mi + 1;
}
return -lo - 1;
}
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);
else {
free(commit_graft[pos]);
commit_graft[pos] = graft;
}
return 1;
}
pos = -pos - 1;
if (commit_graft_alloc <= ++commit_graft_nr) {
commit_graft_alloc = alloc_nr(commit_graft_alloc);
commit_graft = xrealloc(commit_graft,
sizeof(*commit_graft) *
commit_graft_alloc);
}
if (pos < commit_graft_nr)
memmove(commit_graft + pos + 1,
commit_graft + pos,
(commit_graft_nr - pos - 1) *
sizeof(*commit_graft));
commit_graft[pos] = graft;
return 0;
}
struct commit_graft *read_graft_line(char *buf, int len)
{
/* The format is just "Commit Parent1 Parent2 ...\n" */
int i;
struct commit_graft *graft = NULL;
if (buf[len-1] == '\n')
buf[--len] = 0;
if (buf[0] == '#' || buf[0] == '\0')
return NULL;
if ((len + 1) % 41) {
bad_graft_data:
error("bad graft data: %s", buf);
free(graft);
return NULL;
}
i = (len + 1) / 41 - 1;
graft = xmalloc(sizeof(*graft) + 20 * i);
graft->nr_parent = i;
if (get_sha1_hex(buf, graft->sha1))
goto bad_graft_data;
for (i = 40; i < len; i += 41) {
if (buf[i] != ' ')
goto bad_graft_data;
if (get_sha1_hex(buf + i + 1, graft->parent[i/41]))
goto bad_graft_data;
}
return graft;
}
int read_graft_file(const char *graft_file)
{
FILE *fp = fopen(graft_file, "r");
char buf[1024];
if (!fp)
return -1;
while (fgets(buf, sizeof(buf), fp)) {
/* The format is just "Commit Parent1 Parent2 ...\n" */
int len = strlen(buf);
struct commit_graft *graft = read_graft_line(buf, len);
if (!graft)
continue;
if (register_commit_graft(graft, 1))
error("duplicate graft data: %s", buf);
}
fclose(fp);
return 0;
}
static void prepare_commit_graft(void)
{
static int commit_graft_prepared;
char *graft_file;
if (commit_graft_prepared)
return;
graft_file = get_graft_file();
read_graft_file(graft_file);
commit_graft_prepared = 1;
}
static struct commit_graft *lookup_commit_graft(const unsigned char *sha1)
{
int pos;
prepare_commit_graft();
pos = commit_graft_pos(sha1);
if (pos < 0)
return NULL;
return commit_graft[pos];
}
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;
struct commit_graft *graft;
unsigned n_refs = 0;
if (item->object.parsed)
return 0;
item->object.parsed = 1;
tail += size;
if (tail <= bufptr + 5 || memcmp(bufptr, "tree ", 5))
return error("bogus commit object %s", sha1_to_hex(item->object.sha1));
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);
if (item->tree)
n_refs++;
bufptr += 46; /* "tree " + "hex sha1" + "\n" */
pptr = &item->parents;
graft = lookup_commit_graft(item->object.sha1);
while (bufptr + 48 < tail && !memcmp(bufptr, "parent ", 7)) {
struct commit *new_parent;
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)
continue;
new_parent = lookup_commit(parent);
if (new_parent) {
pptr = &commit_list_insert(new_parent, pptr)->next;
n_refs++;
}
}
if (graft) {
int i;
struct commit *new_parent;
for (i = 0; i < graft->nr_parent; i++) {
new_parent = lookup_commit(graft->parent[i]);
if (!new_parent)
continue;
pptr = &commit_list_insert(new_parent, pptr)->next;
n_refs++;
}
}
item->date = parse_commit_date(bufptr);
if (track_object_refs) {
unsigned i = 0;
struct commit_list *p;
struct object_refs *refs = alloc_object_refs(n_refs);
if (item->tree)
refs->ref[i++] = &item->tree->object;
for (p = item->parents; p; p = p->next)
refs->ref[i++] = &p->item->object;
set_object_refs(&item->object, refs);
}
return 0;
}
int parse_commit(struct commit *item)
{
char type[20];
void *buffer;
unsigned long size;
int ret;
if (item->object.parsed)
return 0;
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)) {
free(buffer);
return error("Object %s not a commit",
sha1_to_hex(item->object.sha1));
}
ret = parse_commit_buffer(item, buffer, size);
if (save_commit_buffer && !ret) {
item->buffer = buffer;
return 0;
}
free(buffer);
return ret;
}
struct commit_list *commit_list_insert(struct commit *item, struct commit_list **list_p)
{
struct commit_list *new_list = xmalloc(sizeof(struct commit_list));
new_list->item = item;
new_list->next = *list_p;
*list_p = new_list;
return new_list;
}
void free_commit_list(struct commit_list *list)
{
while (list) {
struct commit_list *temp = list;
list = temp->next;
free(temp);
}
}
struct commit_list * insert_by_date(struct commit *item, struct commit_list **list)
{
struct commit_list **pp = list;
struct commit_list *p;
while ((p = *pp) != NULL) {
if (p->item->date < item->date) {
break;
}
pp = &p->next;
}
return commit_list_insert(item, pp);
}
void sort_by_date(struct commit_list **list)
{
struct commit_list *ret = NULL;
while (*list) {
insert_by_date((*list)->item, &ret);
*list = (*list)->next;
}
*list = ret;
}
struct commit *pop_most_recent_commit(struct commit_list **list,
unsigned int mark)
{
struct commit *ret = (*list)->item;
struct commit_list *parents = ret->parents;
struct commit_list *old = *list;
*list = (*list)->next;
free(old);
while (parents) {
struct commit *commit = parents->item;
parse_commit(commit);
if (!(commit->object.flags & mark)) {
commit->object.flags |= mark;
insert_by_date(commit, list);
}
parents = parents->next;
}
return ret;
}
void clear_commit_marks(struct commit *commit, unsigned int mark)
{
struct commit_list *parents;
commit->object.flags &= ~mark;
parents = commit->parents;
while (parents) {
struct commit *parent = parents->item;
/* Have we already cleared this? */
if (mark & parent->object.flags)
clear_commit_marks(parent, mark);
parents = parents->next;
}
}
/*
* Generic support for pretty-printing the header
*/
static int get_one_line(const char *msg, unsigned long len)
{
int ret = 0;
while (len--) {
char c = *msg++;
if (!c)
break;
ret++;
if (c == '\n')
break;
}
return ret;
}
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] & 0xFF;
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, int relative_date)
{
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, relative_date));
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, relative_date));
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 = NULL;
const char *dots;
if (abbrev)
hex = find_unique_abbrev(p->object.sha1, abbrev);
if (!hex)
hex = sha1_to_hex(p->object.sha1);
dots = (abbrev && strlen(hex) != 40) ? "..." : "";
parent = parent->next;
offset += sprintf(buf + offset, " %s%s", hex, dots);
}
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 relative_date)
{
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, ch, in_body;
for (in_body = i = 0; (ch = msg[i]) && i < len; i++) {
if (!in_body) {
/* author could be non 7-bit ASCII but
* the log may so; skip over the
* header part first.
*/
if (ch == '\n' &&
i + 1 < len && msg[i+1] == '\n')
in_body = 1;
}
else if (ch & 0x80) {
plain_non_ascii = 1;
break;
}
}
}
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,
relative_date);
if (!memcmp(line, "committer ", 10) &&
(fmt == CMIT_FMT_FULL || fmt == CMIT_FMT_FULLER))
offset += add_user_info("Commit", fmt,
buf + offset,
line + 10,
relative_date);
continue;
}
if (!subject)
body = 1;
if (is_empty_line(line, &linelen)) {
if (!body)
continue;
if (subject)
continue;
if (fmt == CMIT_FMT_SHORT)
break;
}
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';
/*
* make sure there is another EOLN to separate the headers from whatever
* body the caller appends if we haven't already written a body
*/
if (fmt == CMIT_FMT_EMAIL && !body)
buf[offset++] = '\n';
buf[offset] = '\0';
return offset;
}
struct commit *pop_commit(struct commit_list **stack)
{
struct commit_list *top = *stack;
struct commit *item = top ? top->item : NULL;
if (top) {
*stack = top->next;
free(top);
}
return item;
}
int count_parents(struct commit * commit)
{
int count;
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->util = data;
}
void *topo_sort_default_getter(struct commit *c)
{
return c->util;
}
/*
* Performs an in-place topological sort on the list supplied.
*/
void sort_in_topological_order(struct commit_list ** list, int lifo)
{
sort_in_topological_order_fn(list, lifo, topo_sort_default_setter,
topo_sort_default_getter);
}
void sort_in_topological_order_fn(struct commit_list ** list, int lifo,
topo_sort_set_fn_t setter,
topo_sort_get_fn_t getter)
{
struct commit_list * next = *list;
struct commit_list * work = NULL, **insert;
struct commit_list ** pptr = list;
struct sort_node * nodes;
struct sort_node * next_nodes;
int count = 0;
/* determine the size of the list */
while (next) {
next = next->next;
count++;
}
if (!count)
return;
/* allocate an array to help sort the list */
nodes = xcalloc(count, sizeof(*nodes));
/* link the list to the array */
next_nodes = nodes;
next=*list;
while (next) {
next_nodes->list_item = next;
setter(next->item, next_nodes);
next_nodes++;
next = next->next;
}
/* update the indegree */
next=*list;
while (next) {
struct commit_list * parents = next->item->parents;
while (parents) {
struct commit * parent=parents->item;
struct sort_node * pn = (struct sort_node *) getter(parent);
if (pn)
pn->indegree++;
parents=parents->next;
}
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.
*/
next=*list;
insert = &work;
while (next) {
struct sort_node * node = (struct sort_node *) getter(next->item);
if (node->indegree == 0) {
insert = &commit_list_insert(next->item, insert)->next;
}
next=next->next;
}
/* process the list in topological order */
if (!lifo)
sort_by_date(&work);
while (work) {
struct commit * work_item = pop_commit(&work);
struct sort_node * work_node = (struct sort_node *) getter(work_item);
struct commit_list * parents = work_item->parents;
while (parents) {
struct commit * parent=parents->item;
struct sort_node * pn = (struct sort_node *) getter(parent);
if (pn) {
/*
* parents are only enqueued for emission
* when all their children have been emitted thereby
* guaranteeing topological order.
*/
pn->indegree--;
if (!pn->indegree) {
if (!lifo)
insert_by_date(parent, &work);
else
commit_list_insert(parent, &work);
}
}
parents=parents->next;
}
/*
* 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;
setter(work_item, NULL);
}
free(nodes);
}
/* merge-rebase stuff */
/* bits #0..7 in revision.h */
#define PARENT1 (1u<< 8)
#define PARENT2 (1u<< 9)
#define STALE (1u<<10)
#define RESULT (1u<<11)
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 */
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)
{
const unsigned all_flags = (PARENT1 | PARENT2 | STALE | RESULT);
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;
}
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