#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.
- */
- 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) &&
- !strncmp(arg, cmt_fmts[i].n, strlen(arg)))
- 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)
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)
+ return create_object(sha1, OBJ_COMMIT, alloc_commit_node());
if (!obj->type)
obj->type = OBJ_COMMIT;
return check_commit(obj, sha1, 0);
}
-static unsigned long parse_commit_date(const char *buf)
+static unsigned long parse_commit_date(const char *buf, const char *tail)
{
unsigned long date;
+ const char *dateptr;
+ if (buf + 6 >= tail)
+ return 0;
if (memcmp(buf, "author", 6))
return 0;
- while (*buf++ != '\n')
+ while (buf < tail && *buf++ != '\n')
/* nada */;
+ if (buf + 9 >= tail)
+ return 0;
if (memcmp(buf, "committer", 9))
return 0;
- while (*buf++ != '>')
+ while (buf < tail && *buf++ != '>')
+ /* nada */;
+ if (buf >= tail)
+ return 0;
+ dateptr = buf;
+ while (buf < tail && *buf++ != '\n')
/* nada */;
- date = strtoul(buf, NULL, 10);
+ if (buf >= tail)
+ return 0;
+ /* dateptr < buf && buf[-1] == '\n', so strtoul will stop at buf-1 */
+ date = strtoul(dateptr, NULL, 10);
if (date == ULONG_MAX)
date = 0;
return date;
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 0;
item->object.parsed = 1;
tail += size;
- if (tail <= bufptr + 5 || memcmp(bufptr, "tree ", 5))
+ if (tail <= bufptr + 46 || memcmp(bufptr, "tree ", 5) || bufptr[45] != '\n')
return error("bogus commit object %s", sha1_to_hex(item->object.sha1));
- if (tail <= bufptr + 45 || get_sha1_hex(bufptr + 5, parent) < 0)
+ if (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);
n_refs++;
}
}
- item->date = parse_commit_date(bufptr);
+ item->date = parse_commit_date(bufptr, tail);
if (track_object_refs) {
unsigned i = 0;
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;
-
- 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;
-}
-
-/* High bit set, or ISO-2022-INT */
-static int non_ascii(int ch)
-{
- ch = (ch & 0xff);
- return ((ch & 0x80) || (ch == 0x1b));
-}
-
-static int is_rfc2047_special(char ch)
-{
- return (non_ascii(ch) || (ch == '=') || (ch == '?') || (ch == '_'));
-}
-
-static int add_rfc2047(char *buf, const char *line, int len,
- const char *encoding)
-{
- char *bp = buf;
- int i, needquote;
- char q_encoding[128];
- const char *q_encoding_fmt = "=?%s?q?";
-
- for (i = needquote = 0; !needquote && i < len; i++) {
- int ch = line[i];
- if (non_ascii(ch))
- needquote++;
- if ((i + 1 < len) &&
- (ch == '=' && line[i+1] == '?'))
- needquote++;
- }
- if (!needquote)
- return sprintf(buf, "%.*s", len, line);
-
- i = snprintf(q_encoding, sizeof(q_encoding), q_encoding_fmt, encoding);
- if (sizeof(q_encoding) < i)
- die("Insanely long encoding name %s", encoding);
- memcpy(bp, q_encoding, i);
- bp += i;
- 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,
- const char *encoding)
-{
- 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,
- encoding);
- 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;
-}
-
-static char *get_header(const struct commit *commit, const char *key)
-{
- int key_len = strlen(key);
- const char *line = commit->buffer;
-
- for (;;) {
- const char *eol = strchr(line, '\n'), *next;
-
- if (line == eol)
- return NULL;
- if (!eol) {
- eol = line + strlen(line);
- next = NULL;
- } else
- next = eol + 1;
- if (!strncmp(line, key, key_len) && line[key_len] == ' ') {
- int len = eol - line - key_len;
- char *ret = xmalloc(len);
- memcpy(ret, line + key_len + 1, len - 1);
- ret[len - 1] = '\0';
- return ret;
- }
- line = next;
- }
-}
-
-static char *replace_encoding_header(char *buf, char *encoding)
-{
- char *encoding_header = strstr(buf, "\nencoding ");
- char *header_end = strstr(buf, "\n\n");
- char *end_of_encoding_header;
- int encoding_header_pos;
- int encoding_header_len;
- int new_len;
- int need_len;
- int buflen = strlen(buf) + 1;
-
- if (!header_end)
- header_end = buf + buflen;
- if (!encoding_header || encoding_header >= header_end)
- return buf;
- encoding_header++;
- end_of_encoding_header = strchr(encoding_header, '\n');
- if (!end_of_encoding_header)
- return buf; /* should not happen but be defensive */
- end_of_encoding_header++;
-
- encoding_header_len = end_of_encoding_header - encoding_header;
- encoding_header_pos = encoding_header - buf;
-
- if (is_encoding_utf8(encoding)) {
- /* we have re-coded to UTF-8; drop the header */
- memmove(encoding_header, end_of_encoding_header,
- buflen - (encoding_header_pos + encoding_header_len));
- return buf;
- }
- new_len = strlen(encoding);
- need_len = new_len + strlen("encoding \n");
- if (encoding_header_len < need_len) {
- buf = xrealloc(buf, buflen + (need_len - encoding_header_len));
- encoding_header = buf + encoding_header_pos;
- end_of_encoding_header = encoding_header + encoding_header_len;
- }
- memmove(end_of_encoding_header + (need_len - encoding_header_len),
- end_of_encoding_header,
- buflen - (encoding_header_pos + encoding_header_len));
- memcpy(encoding_header + 9, encoding, strlen(encoding));
- encoding_header[9 + new_len] = '\n';
- return buf;
-}
-
-static char *logmsg_reencode(const struct commit *commit,
- char *output_encoding)
-{
- char *encoding;
- char *out;
- char *utf8 = "utf-8";
-
- if (!*output_encoding)
- return NULL;
- encoding = get_header(commit, "encoding");
- if (!encoding)
- encoding = utf8;
- if (!strcmp(encoding, output_encoding))
- out = strdup(commit->buffer);
- else
- out = reencode_string(commit->buffer,
- output_encoding, encoding);
- if (out)
- out = replace_encoding_header(out, output_encoding);
-
- if (encoding != utf8)
- free(encoding);
- if (!out)
- return NULL;
- return out;
-}
-
-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, seen_title = 0;
- unsigned long offset = 0;
- int indent = 4;
- int parents_shown = 0;
- const char *msg = commit->buffer;
- int plain_non_ascii = 0;
- char *reencoded;
- char *encoding;
-
- encoding = (git_log_output_encoding
- ? git_log_output_encoding
- : git_commit_encoding);
- if (!encoding)
- encoding = "utf-8";
- reencoded = logmsg_reencode(commit, encoding);
- if (reencoded)
- msg = reencoded;
-
- 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 be so; skip over the
- * header part first.
- */
- if (ch == '\n' &&
- i + 1 < len && msg[i+1] == '\n')
- in_body = 1;
- }
- else if (non_ascii(ch)) {
- plain_non_ascii = 1;
- break;
- }
- }
- }
-
- for (;;) {
- const char *line = msg;
- int linelen = get_one_line(msg, len);
-
- if (!linelen)
- break;
+ while (commit) {
+ struct commit_list *parents;
- /*
- * 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;
- }
+ if (!(mark & commit->object.flags))
+ return;
- 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;
- }
+ commit->object.flags &= ~mark;
- 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,
- encoding);
- 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,
- encoding);
- continue;
- }
+ parents = commit->parents;
+ if (!parents)
+ return;
- if (!subject)
- body = 1;
+ while ((parents = parents->next))
+ clear_commit_marks(parents->item, mark);
- if (is_empty_line(line, &linelen)) {
- if (!seen_title)
- continue;
- if (!body)
- continue;
- if (subject)
- continue;
- if (fmt == CMIT_FMT_SHORT)
- break;
- }
-
- seen_title = 1;
- if (subject) {
- int slen = strlen(subject);
- memcpy(buf + offset, subject, slen);
- offset += slen;
- offset += add_rfc2047(buf + offset, line, linelen,
- encoding);
- }
- 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) {
- int sz;
- char header[512];
- const char *header_fmt =
- "Content-Type: text/plain; charset=%s\n"
- "Content-Transfer-Encoding: 8bit\n";
- sz = snprintf(header, sizeof(header), header_fmt,
- encoding);
- if (sizeof(header) < sz)
- die("Encoding name %s too long", encoding);
- memcpy(buf + offset, header, sz);
- offset += sz;
- }
- 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;
+ commit = commit->parents->item;
}
- 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';
-
- free(reencoded);
- return offset;
}
struct commit *pop_commit(struct commit_list **stack)
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);
-}
+ struct commit_list *next, *orig = *list;
+ struct commit_list *work, **insert;
+ struct commit_list **pptr;
-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)
+ if (!orig)
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;
+ *list = NULL;
+
+ /* Mark them and clear the indegree */
+ for (next = orig; next; next = next->next) {
+ struct commit *commit = next->item;
+ commit->object.flags |= TOPOSORT;
+ commit->indegree = 0;
}
+
/* update the indegree */
- next=*list;
- while (next) {
+ for (next = orig; next; next = next->next) {
struct commit_list * parents = next->item->parents;
while (parents) {
- struct commit * parent=parents->item;
- struct sort_node * pn = (struct sort_node *) getter(parent);
+ struct commit *parent = parents->item;
- if (pn)
- pn->indegree++;
- parents=parents->next;
+ if (parent->object.flags & TOPOSORT)
+ parent->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;
+
+ /*
+ * 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.
+ */
+ work = NULL;
insert = &work;
- while (next) {
- struct sort_node * node = (struct sort_node *) getter(next->item);
+ for (next = orig; next; next = next->next) {
+ struct commit *commit = next->item;
- if (node->indegree == 0) {
- insert = &commit_list_insert(next->item, insert)->next;
- }
- next=next->next;
+ if (!commit->indegree)
+ insert = &commit_list_insert(commit, insert)->next;
}
/* process the list in topological order */
if (!lifo)
sort_by_date(&work);
+
+ pptr = list;
+ *list = NULL;
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;
+ struct commit *commit;
+ struct commit_list *parents, *work_item;
- 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);
- }
+ work_item = work;
+ work = work_item->next;
+ work_item->next = NULL;
+
+ commit = work_item->item;
+ for (parents = commit->parents; parents ; parents = parents->next) {
+ struct commit *parent=parents->item;
+
+ if (!(parent->object.flags & TOPOSORT))
+ continue;
+
+ /*
+ * parents are only enqueued for emission
+ * when all their children have been emitted thereby
+ * guaranteeing topological order.
+ */
+ if (!--parent->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);
+ * work_item is a commit all of whose children
+ * have already been emitted. we can emit it now.
+ */
+ commit->object.flags &= ~TOPOSORT;
+ *pptr = work_item;
+ pptr = &work_item->next;
}
- free(nodes);
}
/* merge-base stuff */
}
struct commit_list *get_merge_bases(struct commit *one,
- struct commit *two,
- int cleanup)
+ struct commit *two, int cleanup)
{
struct commit_list *list;
struct commit **rslt;
return result;
}
-int in_merge_bases(struct commit *rev1, struct commit *rev2)
+int in_merge_bases(struct commit *commit, struct commit **reference, int num)
{
struct commit_list *bases, *b;
int ret = 0;
- bases = get_merge_bases(rev1, rev2, 1);
+ if (num == 1)
+ bases = get_merge_bases(commit, *reference, 1);
+ else
+ die("not yet");
for (b = bases; b; b = b->next) {
- if (!hashcmp(rev1->object.sha1, b->item->object.sha1)) {
+ if (!hashcmp(commit->object.sha1, b->item->object.sha1)) {
ret = 1;
break;
}