X-Git-Url: https://git.tokkee.org/?a=blobdiff_plain;f=commit.c;h=03436b1b077f3f83cebceb697f97c3ba5b26265c;hb=384f122b7c6dd2b52cc6029afee16560c38850ae;hp=5b6e082c85f203cf27ac5b50f2d06a18b36fdc70;hpb=69de8cc8527dc45a7aef76e8f1ace45b509b3712;p=git.git

diff --git a/commit.c b/commit.c
index 5b6e082c8..03436b1b0 100644
--- a/commit.c
+++ b/commit.c
@@ -1,6 +1,11 @@
 #include "cache.h"
 #include "tag.h"
 #include "commit.h"
+#include "pkt-line.h"
+#include "utf8.h"
+#include "interpolate.h"
+#include "diff.h"
+#include "revision.h"
 
 int save_commit_buffer = 1;
 
@@ -22,7 +27,7 @@ struct sort_node
 
 const char *commit_type = "commit";
 
-struct cmt_fmt_map {
+static struct cmt_fmt_map {
 	const char *n;
 	size_t cmp_len;
 	enum cmit_fmt v;
@@ -34,8 +39,11 @@ struct cmt_fmt_map {
 	{ "full",	5,	CMIT_FMT_FULL },
 	{ "fuller",	5,	CMIT_FMT_FULLER },
 	{ "oneline",	1,	CMIT_FMT_ONELINE },
+	{ "format:",	7,	CMIT_FMT_USERFORMAT},
 };
 
+static char *user_format;
+
 enum cmit_fmt get_commit_format(const char *arg)
 {
 	int i;
@@ -44,8 +52,15 @@ enum cmit_fmt get_commit_format(const char *arg)
 		return CMIT_FMT_DEFAULT;
 	if (*arg == '=')
 		arg++;
+	if (!prefixcmp(arg, "format:")) {
+		if (user_format)
+			free(user_format);
+		user_format = xstrdup(arg + 7);
+		return CMIT_FMT_USERFORMAT;
+	}
 	for (i = 0; i < ARRAY_SIZE(cmt_fmts); i++) {
-		if (!strncmp(arg, cmt_fmts[i].n, cmt_fmts[i].cmp_len))
+		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;
 	}
 
@@ -83,12 +98,8 @@ struct commit *lookup_commit_reference(const unsigned char *sha1)
 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);
@@ -137,7 +148,7 @@ static int commit_graft_pos(const unsigned char *sha1)
 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);
@@ -221,6 +232,8 @@ static void prepare_commit_graft(void)
 		return;
 	graft_file = get_graft_file();
 	read_graft_file(graft_file);
+	/* make sure shallows are read */
+	is_repository_shallow();
 	commit_graft_prepared = 1;
 }
 
@@ -234,6 +247,39 @@ static struct commit_graft *lookup_commit_graft(const unsigned char *sha1)
 	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;
@@ -304,18 +350,18 @@ int parse_commit_buffer(struct commit *item, void *buffer, unsigned long size)
 
 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));
@@ -360,7 +406,7 @@ struct commit_list * insert_by_date(struct commit *item, struct commit_list **li
 	return commit_list_insert(item, pp);
 }
 
-	
+
 void sort_by_date(struct commit_list **list)
 {
 	struct commit_list *ret = NULL;
@@ -427,20 +473,29 @@ static int get_one_line(const char *msg, unsigned long len)
 	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 ((ch & 0x80) || (ch == '=') || (ch == '?') || (ch == '_'));
+	return (non_ascii(ch) || (ch == '=') || (ch == '?') || (ch == '_'));
 }
 
-static int add_rfc2047(char *buf, const char *line, int len)
+static int add_rfc2047(char *buf, const char *line, int len,
+		       const char *encoding)
 {
 	char *bp = buf;
 	int i, needquote;
-	static const char q_utf8[] = "=?utf-8?q?";
+	char q_encoding[128];
+	const char *q_encoding_fmt = "=?%s?q?";
 
 	for (i = needquote = 0; !needquote && i < len; i++) {
-		unsigned ch = line[i];
-		if (ch & 0x80)
+		int ch = line[i];
+		if (non_ascii(ch))
 			needquote++;
 		if ((i + 1 < len) &&
 		    (ch == '=' && line[i+1] == '?'))
@@ -449,16 +504,23 @@ static int add_rfc2047(char *buf, const char *line, int len)
 	if (!needquote)
 		return sprintf(buf, "%.*s", len, line);
 
-	memcpy(bp, q_utf8, sizeof(q_utf8)-1);
-	bp += sizeof(q_utf8)-1;
+	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)) {
+		/*
+		 * We encode ' ' using '=20' even though rfc2047
+		 * allows using '_' for readability.  Unfortunately,
+		 * many programs do not understand this and just
+		 * leave the underscore in place.
+		 */
+		if (is_rfc2047_special(ch) || ch == ' ') {
 			sprintf(bp, "=%02X", ch);
 			bp += 3;
 		}
-		else if (ch == ' ')
-			*bp++ = '_';
 		else
 			*bp++ = ch;
 	}
@@ -467,8 +529,17 @@ static int add_rfc2047(char *buf, const char *line, int len)
 	return bp - buf;
 }
 
+static unsigned long bound_rfc2047(unsigned long len, const char *encoding)
+{
+	/* upper bound of q encoded string of length 'len' */
+	unsigned long elen = strlen(encoding);
+
+	return len * 3 + elen + 100;
+}
+
 static int add_user_info(const char *what, enum cmit_fmt fmt, char *buf,
-			 const char *line, int relative_date)
+			 const char *line, enum date_mode dmode,
+			 const char *encoding)
 {
 	char *date;
 	int namelen;
@@ -496,7 +567,8 @@ static int add_user_info(const char *what, enum cmit_fmt fmt, char *buf,
 		filler = "";
 		strcpy(buf, "From: ");
 		ret = strlen(buf);
-		ret += add_rfc2047(buf + ret, line, display_name_length);
+		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';
@@ -509,7 +581,7 @@ static int add_user_info(const char *what, enum cmit_fmt fmt, char *buf,
 	switch (fmt) {
 	case CMIT_FMT_MEDIUM:
 		ret += sprintf(buf + ret, "Date:   %s\n",
-			       show_date(time, tz, relative_date));
+			       show_date(time, tz, dmode));
 		break;
 	case CMIT_FMT_EMAIL:
 		ret += sprintf(buf + ret, "Date: %s\n",
@@ -517,7 +589,7 @@ static int add_user_info(const char *what, enum cmit_fmt fmt, char *buf,
 		break;
 	case CMIT_FMT_FULLER:
 		ret += sprintf(buf + ret, "%sDate: %s\n", what,
-			       show_date(time, tz, relative_date));
+			       show_date(time, tz, dmode));
 		break;
 	default:
 		/* notin' */
@@ -548,10 +620,13 @@ static int add_merge_info(enum cmit_fmt fmt, char *buf, const struct commit *com
 
 	while (parent) {
 		struct commit *p = parent->item;
-		const char *hex = abbrev
-			? find_unique_abbrev(p->object.sha1, abbrev)
-			: sha1_to_hex(p->object.sha1);
-		const char *dots = (abbrev && strlen(hex) != 40) ? "..." : "";
+		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);
@@ -560,17 +635,541 @@ static int add_merge_info(enum cmit_fmt fmt, char *buf, const struct commit *com
 	return offset;
 }
 
-unsigned long pretty_print_commit(enum cmit_fmt fmt, const struct commit *commit,
-				  unsigned long len, char *buf, unsigned long space,
+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 (eol - line > key_len &&
+		    !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, const 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,
+			     const char *output_encoding)
+{
+	static const char *utf8 = "utf-8";
+	const char *use_encoding;
+	char *encoding;
+	char *out;
+
+	if (!*output_encoding)
+		return NULL;
+	encoding = get_header(commit, "encoding");
+	use_encoding = encoding ? encoding : utf8;
+	if (!strcmp(use_encoding, output_encoding))
+		out = xstrdup(commit->buffer);
+	else
+		out = reencode_string(commit->buffer,
+				      output_encoding, use_encoding);
+	if (out)
+		out = replace_encoding_header(out, output_encoding);
+
+	free(encoding);
+	return out;
+}
+
+static void fill_person(struct interp *table, const char *msg, int len)
+{
+	int start, end, tz = 0;
+	unsigned long date;
+	char *ep;
+
+	/* parse name */
+	for (end = 0; end < len && msg[end] != '<'; end++)
+		; /* do nothing */
+	start = end + 1;
+	while (end > 0 && isspace(msg[end - 1]))
+		end--;
+	table[0].value = xstrndup(msg, end);
+
+	if (start >= len)
+		return;
+
+	/* parse email */
+	for (end = start + 1; end < len && msg[end] != '>'; end++)
+		; /* do nothing */
+
+	if (end >= len)
+		return;
+
+	table[1].value = xstrndup(msg + start, end - start);
+
+	/* parse date */
+	for (start = end + 1; start < len && isspace(msg[start]); start++)
+		; /* do nothing */
+	if (start >= len)
+		return;
+	date = strtoul(msg + start, &ep, 10);
+	if (msg + start == ep)
+		return;
+
+	table[5].value = xstrndup(msg + start, ep - (msg + start));
+
+	/* parse tz */
+	for (start = ep - msg + 1; start < len && isspace(msg[start]); start++)
+		; /* do nothing */
+	if (start + 1 < len) {
+		tz = strtoul(msg + start + 1, NULL, 10);
+		if (msg[start] == '-')
+			tz = -tz;
+	}
+
+	interp_set_entry(table, 2, show_date(date, tz, 0));
+	interp_set_entry(table, 3, show_rfc2822_date(date, tz));
+	interp_set_entry(table, 4, show_date(date, tz, 1));
+}
+
+static long format_commit_message(const struct commit *commit,
+		const char *msg, char **buf_p, unsigned long *space_p)
+{
+	struct interp table[] = {
+		{ "%H" },	/* commit hash */
+		{ "%h" },	/* abbreviated commit hash */
+		{ "%T" },	/* tree hash */
+		{ "%t" },	/* abbreviated tree hash */
+		{ "%P" },	/* parent hashes */
+		{ "%p" },	/* abbreviated parent hashes */
+		{ "%an" },	/* author name */
+		{ "%ae" },	/* author email */
+		{ "%ad" },	/* author date */
+		{ "%aD" },	/* author date, RFC2822 style */
+		{ "%ar" },	/* author date, relative */
+		{ "%at" },	/* author date, UNIX timestamp */
+		{ "%cn" },	/* committer name */
+		{ "%ce" },	/* committer email */
+		{ "%cd" },	/* committer date */
+		{ "%cD" },	/* committer date, RFC2822 style */
+		{ "%cr" },	/* committer date, relative */
+		{ "%ct" },	/* committer date, UNIX timestamp */
+		{ "%e" },	/* encoding */
+		{ "%s" },	/* subject */
+		{ "%b" },	/* body */
+		{ "%Cred" },	/* red */
+		{ "%Cgreen" },	/* green */
+		{ "%Cblue" },	/* blue */
+		{ "%Creset" },	/* reset color */
+		{ "%n" },	/* newline */
+		{ "%m" },	/* left/right/bottom */
+	};
+	enum interp_index {
+		IHASH = 0, IHASH_ABBREV,
+		ITREE, ITREE_ABBREV,
+		IPARENTS, IPARENTS_ABBREV,
+		IAUTHOR_NAME, IAUTHOR_EMAIL,
+		IAUTHOR_DATE, IAUTHOR_DATE_RFC2822, IAUTHOR_DATE_RELATIVE,
+		IAUTHOR_TIMESTAMP,
+		ICOMMITTER_NAME, ICOMMITTER_EMAIL,
+		ICOMMITTER_DATE, ICOMMITTER_DATE_RFC2822,
+		ICOMMITTER_DATE_RELATIVE, ICOMMITTER_TIMESTAMP,
+		IENCODING,
+		ISUBJECT,
+		IBODY,
+		IRED, IGREEN, IBLUE, IRESET_COLOR,
+		INEWLINE,
+		ILEFT_RIGHT,
+	};
+	struct commit_list *p;
+	char parents[1024];
+	int i;
+	enum { HEADER, SUBJECT, BODY } state;
+
+	if (ILEFT_RIGHT + 1 != ARRAY_SIZE(table))
+		die("invalid interp table!");
+
+	/* these are independent of the commit */
+	interp_set_entry(table, IRED, "\033[31m");
+	interp_set_entry(table, IGREEN, "\033[32m");
+	interp_set_entry(table, IBLUE, "\033[34m");
+	interp_set_entry(table, IRESET_COLOR, "\033[m");
+	interp_set_entry(table, INEWLINE, "\n");
+
+	/* these depend on the commit */
+	if (!commit->object.parsed)
+		parse_object(commit->object.sha1);
+	interp_set_entry(table, IHASH, sha1_to_hex(commit->object.sha1));
+	interp_set_entry(table, IHASH_ABBREV,
+			find_unique_abbrev(commit->object.sha1,
+				DEFAULT_ABBREV));
+	interp_set_entry(table, ITREE, sha1_to_hex(commit->tree->object.sha1));
+	interp_set_entry(table, ITREE_ABBREV,
+			find_unique_abbrev(commit->tree->object.sha1,
+				DEFAULT_ABBREV));
+	interp_set_entry(table, ILEFT_RIGHT,
+			 (commit->object.flags & BOUNDARY)
+			 ? "-"
+			 : (commit->object.flags & SYMMETRIC_LEFT)
+			 ? "<"
+			 : ">");
+
+	parents[1] = 0;
+	for (i = 0, p = commit->parents;
+			p && i < sizeof(parents) - 1;
+			p = p->next)
+		i += snprintf(parents + i, sizeof(parents) - i - 1, " %s",
+			sha1_to_hex(p->item->object.sha1));
+	interp_set_entry(table, IPARENTS, parents + 1);
+
+	parents[1] = 0;
+	for (i = 0, p = commit->parents;
+			p && i < sizeof(parents) - 1;
+			p = p->next)
+		i += snprintf(parents + i, sizeof(parents) - i - 1, " %s",
+			find_unique_abbrev(p->item->object.sha1,
+				DEFAULT_ABBREV));
+	interp_set_entry(table, IPARENTS_ABBREV, parents + 1);
+
+	for (i = 0, state = HEADER; msg[i] && state < BODY; i++) {
+		int eol;
+		for (eol = i; msg[eol] && msg[eol] != '\n'; eol++)
+			; /* do nothing */
+
+		if (state == SUBJECT) {
+			table[ISUBJECT].value = xstrndup(msg + i, eol - i);
+			i = eol;
+		}
+		if (i == eol) {
+			state++;
+			/* strip empty lines */
+			while (msg[eol + 1] == '\n')
+				eol++;
+		} else if (!prefixcmp(msg + i, "author "))
+			fill_person(table + IAUTHOR_NAME,
+					msg + i + 7, eol - i - 7);
+		else if (!prefixcmp(msg + i, "committer "))
+			fill_person(table + ICOMMITTER_NAME,
+					msg + i + 10, eol - i - 10);
+		else if (!prefixcmp(msg + i, "encoding "))
+			table[IENCODING].value =
+				xstrndup(msg + i + 9, eol - i - 9);
+		i = eol;
+	}
+	if (msg[i])
+		table[IBODY].value = xstrdup(msg + i);
+	for (i = 0; i < ARRAY_SIZE(table); i++)
+		if (!table[i].value)
+			interp_set_entry(table, i, "<unknown>");
+
+	do {
+		char *buf = *buf_p;
+		unsigned long space = *space_p;
+
+		space = interpolate(buf, space, user_format,
+				    table, ARRAY_SIZE(table));
+		if (!space)
+			break;
+		buf = xrealloc(buf, space);
+		*buf_p = buf;
+		*space_p = space;
+	} while (1);
+	interp_clear_table(table, ARRAY_SIZE(table));
+
+	return strlen(*buf_p);
+}
+
+static void pp_header(enum cmit_fmt fmt,
+		      int abbrev,
+		      enum date_mode dmode,
+		      const char *encoding,
+		      const struct commit *commit,
+		      const char **msg_p,
+		      unsigned long *len_p,
+		      unsigned long *ofs_p,
+		      char **buf_p,
+		      unsigned long *space_p)
+{
+	int parents_shown = 0;
+
+	for (;;) {
+		const char *line = *msg_p;
+		char *dst;
+		int linelen = get_one_line(*msg_p, *len_p);
+		unsigned long len;
+
+		if (!linelen)
+			return;
+		*msg_p += linelen;
+		*len_p -= linelen;
+
+		if (linelen == 1)
+			/* End of header */
+			return;
+
+		ALLOC_GROW(*buf_p, linelen + *ofs_p + 20, *space_p);
+		dst = *buf_p + *ofs_p;
+
+		if (fmt == CMIT_FMT_RAW) {
+			memcpy(dst, line, linelen);
+			*ofs_p += linelen;
+			continue;
+		}
+
+		if (!memcmp(line, "parent ", 7)) {
+			if (linelen != 48)
+				die("bad parent line in commit");
+			continue;
+		}
+
+		if (!parents_shown) {
+			struct commit_list *parent;
+			int num;
+			for (parent = commit->parents, num = 0;
+			     parent;
+			     parent = parent->next, num++)
+				;
+			/* with enough slop */
+			num = *ofs_p + num * 50 + 20;
+			ALLOC_GROW(*buf_p, num, *space_p);
+			dst = *buf_p + *ofs_p;
+			*ofs_p += add_merge_info(fmt, dst, commit, abbrev);
+			parents_shown = 1;
+		}
+
+		/*
+		 * 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)) {
+			len = linelen;
+			if (fmt == CMIT_FMT_EMAIL)
+				len = bound_rfc2047(linelen, encoding);
+			ALLOC_GROW(*buf_p, *ofs_p + len + 80, *space_p);
+			dst = *buf_p + *ofs_p;
+			*ofs_p += add_user_info("Author", fmt, dst,
+						line + 7, dmode, encoding);
+		}
+
+		if (!memcmp(line, "committer ", 10) &&
+		    (fmt == CMIT_FMT_FULL || fmt == CMIT_FMT_FULLER)) {
+			len = linelen;
+			if (fmt == CMIT_FMT_EMAIL)
+				len = bound_rfc2047(linelen, encoding);
+			ALLOC_GROW(*buf_p, *ofs_p + len + 80, *space_p);
+			dst = *buf_p + *ofs_p;
+			*ofs_p += add_user_info("Commit", fmt, dst,
+						line + 10, dmode, encoding);
+		}
+	}
+}
+
+static void pp_title_line(enum cmit_fmt fmt,
+			  const char **msg_p,
+			  unsigned long *len_p,
+			  unsigned long *ofs_p,
+			  char **buf_p,
+			  unsigned long *space_p,
+			  int indent,
+			  const char *subject,
+			  const char *after_subject,
+			  const char *encoding,
+			  int plain_non_ascii)
+{
+	char *title;
+	unsigned long title_alloc, title_len;
+	unsigned long len;
+
+	title_len = 0;
+	title_alloc = 80;
+	title = xmalloc(title_alloc);
+	for (;;) {
+		const char *line = *msg_p;
+		int linelen = get_one_line(line, *len_p);
+		*msg_p += linelen;
+		*len_p -= linelen;
+
+		if (!linelen || is_empty_line(line, &linelen))
+			break;
+
+		if (title_alloc <= title_len + linelen + 2) {
+			title_alloc = title_len + linelen + 80;
+			title = xrealloc(title, title_alloc);
+		}
+		len = 0;
+		if (title_len) {
+			if (fmt == CMIT_FMT_EMAIL) {
+				len++;
+				title[title_len++] = '\n';
+			}
+			len++;
+			title[title_len++] = ' ';
+		}
+		memcpy(title + title_len, line, linelen);
+		title_len += linelen;
+	}
+
+	/* Enough slop for the MIME header and rfc2047 */
+	len = bound_rfc2047(title_len, encoding)+ 1000;
+	if (subject)
+		len += strlen(subject);
+	if (after_subject)
+		len += strlen(after_subject);
+	if (encoding)
+		len += strlen(encoding);
+	ALLOC_GROW(*buf_p, title_len + *ofs_p + len, *space_p);
+
+	if (subject) {
+		len = strlen(subject);
+		memcpy(*buf_p + *ofs_p, subject, len);
+		*ofs_p += len;
+		*ofs_p += add_rfc2047(*buf_p + *ofs_p,
+				      title, title_len, encoding);
+	} else {
+		memcpy(*buf_p + *ofs_p, title, title_len);
+		*ofs_p += title_len;
+	}
+	(*buf_p)[(*ofs_p)++] = '\n';
+	if (plain_non_ascii) {
+		const char *header_fmt =
+			"MIME-Version: 1.0\n"
+			"Content-Type: text/plain; charset=%s\n"
+			"Content-Transfer-Encoding: 8bit\n";
+		*ofs_p += snprintf(*buf_p + *ofs_p,
+				   *space_p - *ofs_p,
+				   header_fmt, encoding);
+	}
+	if (after_subject) {
+		len = strlen(after_subject);
+		memcpy(*buf_p + *ofs_p, after_subject, len);
+		*ofs_p += len;
+	}
+	free(title);
+	if (fmt == CMIT_FMT_EMAIL) {
+		ALLOC_GROW(*buf_p, *ofs_p + 20, *space_p);
+		(*buf_p)[(*ofs_p)++] = '\n';
+	}
+}
+
+static void pp_remainder(enum cmit_fmt fmt,
+			 const char **msg_p,
+			 unsigned long *len_p,
+			 unsigned long *ofs_p,
+			 char **buf_p,
+			 unsigned long *space_p,
+			 int indent)
+{
+	int first = 1;
+	for (;;) {
+		const char *line = *msg_p;
+		int linelen = get_one_line(line, *len_p);
+		*msg_p += linelen;
+		*len_p -= linelen;
+
+		if (!linelen)
+			break;
+
+		if (is_empty_line(line, &linelen)) {
+			if (first)
+				continue;
+			if (fmt == CMIT_FMT_SHORT)
+				break;
+		}
+		first = 0;
+
+		ALLOC_GROW(*buf_p, *ofs_p + linelen + indent + 20, *space_p);
+		if (indent) {
+			memset(*buf_p + *ofs_p, ' ', indent);
+			*ofs_p += indent;
+		}
+		memcpy(*buf_p + *ofs_p, line, linelen);
+		*ofs_p += linelen;
+		(*buf_p)[(*ofs_p)++] = '\n';
+	}
+}
+
+unsigned long pretty_print_commit(enum cmit_fmt fmt,
+				  const struct commit *commit,
+				  unsigned long len,
+				  char **buf_p, unsigned long *space_p,
 				  int abbrev, const char *subject,
-				  const char *after_subject, int relative_date)
+				  const char *after_subject,
+				  enum date_mode dmode)
 {
-	int hdr = 1, body = 0;
 	unsigned long offset = 0;
+	unsigned long beginning_of_body;
 	int indent = 4;
-	int parents_shown = 0;
 	const char *msg = commit->buffer;
 	int plain_non_ascii = 0;
+	char *reencoded;
+	const char *encoding;
+	char *buf;
+
+	if (fmt == CMIT_FMT_USERFORMAT)
+		return format_commit_message(commit, msg, buf_p, space_p);
+
+	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;
+		len = strlen(reencoded);
+	}
 
 	if (fmt == CMIT_FMT_ONELINE || fmt == CMIT_FMT_EMAIL)
 		indent = 0;
@@ -587,137 +1186,72 @@ unsigned long pretty_print_commit(enum cmit_fmt fmt, const struct commit *commit
 		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
+				 * 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 (ch & 0x80) {
+			else if (non_ascii(ch)) {
 				plain_non_ascii = 1;
 				break;
 			}
 		}
 	}
 
+	pp_header(fmt, abbrev, dmode, encoding,
+		  commit, &msg, &len,
+		  &offset, buf_p, space_p);
+	if (fmt != CMIT_FMT_ONELINE && !subject) {
+		ALLOC_GROW(*buf_p, offset + 20, *space_p);
+		(*buf_p)[offset++] = '\n';
+	}
+
+	/* Skip excess blank lines at the beginning of body, if any... */
 	for (;;) {
-		const char *line = msg;
 		int linelen = get_one_line(msg, len);
-
+		int ll = linelen;
 		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;
+		if (!is_empty_line(msg, &ll))
 			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;
+	/* These formats treat the title line specially. */
+	if (fmt == CMIT_FMT_ONELINE
+	    || fmt == CMIT_FMT_EMAIL)
+		pp_title_line(fmt, &msg, &len, &offset,
+			      buf_p, space_p, indent,
+			      subject, after_subject, encoding,
+			      plain_non_ascii);
 
-		if (is_empty_line(line, &linelen)) {
-			if (!body)
-				continue;
-			if (subject)
-				continue;
-			if (fmt == CMIT_FMT_SHORT)
-				break;
-		}
+	beginning_of_body = offset;
+	if (fmt != CMIT_FMT_ONELINE)
+		pp_remainder(fmt, &msg, &len, &offset,
+			     buf_p, space_p, indent);
 
-		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]))
+	while (offset && isspace((*buf_p)[offset-1]))
 		offset--;
+
+	ALLOC_GROW(*buf_p, offset + 20, *space_p);
+	buf = *buf_p;
+
 	/* 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
+	 * The caller may append additional body text in e-mail
+	 * format.  Make sure we did not strip the blank line
+	 * between the header and the body.
 	 */
-	if (fmt == CMIT_FMT_EMAIL && !body)
+	if (fmt == CMIT_FMT_EMAIL && offset <= beginning_of_body)
 		buf[offset++] = '\n';
 	buf[offset] = '\0';
+	free(reencoded);
 	return offset;
 }
 
@@ -733,15 +1267,6 @@ 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;
@@ -777,7 +1302,7 @@ void sort_in_topological_order_fn(struct commit_list ** list, int lifo,
 		next = next->next;
 		count++;
 	}
-	
+
 	if (!count)
 		return;
 	/* allocate an array to help sort the list */
@@ -805,11 +1330,11 @@ void sort_in_topological_order_fn(struct commit_list ** list, int lifo,
 		}
 		next=next->next;
 	}
-	/* 
+	/*
          * find the tips
          *
-         * tips are nodes not reachable from any other node in the list 
-         * 
+         * 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;
@@ -837,7 +1362,7 @@ void sort_in_topological_order_fn(struct commit_list ** list, int lifo,
 
 			if (pn) {
 				/*
-				 * parents are only enqueued for emission 
+				 * parents are only enqueued for emission
                                  * when all their children have been emitted thereby
                                  * guaranteeing topological order.
                                  */
@@ -863,13 +1388,15 @@ void sort_in_topological_order_fn(struct commit_list ** list, int lifo,
 	free(nodes);
 }
 
-/* merge-rebase stuff */
+/* merge-base stuff */
 
-/* bits #0..7 in revision.h */
-#define PARENT1		(1u<< 8)
-#define PARENT2		(1u<< 9)
-#define STALE		(1u<<10)
-#define RESULT		(1u<<11)
+/* 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)
 {
@@ -935,6 +1462,7 @@ static struct commit_list *merge_bases(struct commit *one, struct commit *two)
 	}
 
 	/* Clean up the result to remove stale ones */
+	free_commit_list(list);
 	list = result; result = NULL;
 	while (list) {
 		struct commit_list *n = list->next;
@@ -950,7 +1478,6 @@ 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;
@@ -1006,3 +1533,23 @@ struct commit_list *get_merge_bases(struct commit *one,
 	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;
+}