1/* config.c: parsing of config files
  2 *
  3 * Copyright (C) 2006 Lars Hjemli
  4 *
  5 * Licensed under GNU General Public License v2
  6 *   (see COPYING for full license text)
  7 */
  8
  9#include "cgit.h"
 10
 11/*
 12 * url syntax: [repo ['/' cmd [ '/' path]]]
 13 *   repo: any valid repo url, may contain '/'
 14 *   cmd:  log | commit | diff | tree | view | blob | snapshot
 15 *   path: any valid path, may contain '/'
 16 *
 17 */
 18void cgit_parse_url(const char *url)
 19{
 20	char *cmd, *p;
 21
 22	ctx.repo = NULL;
 23	if (!url || url[0] == '\0')
 24		return;
 25
 26	ctx.repo = cgit_get_repoinfo(url);
 27	if (ctx.repo) {
 28		ctx.qry.repo = ctx.repo->url;
 29		return;
 30	}
 31
 32	cmd = strchr(url, '/');
 33	while (!ctx.repo && cmd) {
 34		cmd[0] = '\0';
 35		ctx.repo = cgit_get_repoinfo(url);
 36		if (ctx.repo == NULL) {
 37			cmd[0] = '/';
 38			cmd = strchr(cmd + 1, '/');
 39			continue;
 40		}
 41
 42		ctx.qry.repo = ctx.repo->url;
 43		p = strchr(cmd + 1, '/');
 44		if (p) {
 45			p[0] = '\0';
 46			if (p[1])
 47				ctx.qry.path = trim_end(p + 1, '/');
 48		}
 49		if (cmd[1])
 50			ctx.qry.page = xstrdup(cmd + 1);
 51		return;
 52	}
 53}
 54
 55char *substr(const char *head, const char *tail)
 56{
 57	char *buf;
 58
 59	buf = xmalloc(tail - head + 1);
 60	strncpy(buf, head, tail - head);
 61	buf[tail - head] = '\0';
 62	return buf;
 63}
 64
 65char *parse_user(char *t, char **name, char **email, unsigned long *date)
 66{
 67	char *p = t;
 68	int mode = 1;
 69
 70	while (p && *p) {
 71		if (mode == 1 && *p == '<') {
 72			*name = substr(t, p - 1);
 73			t = p;
 74			mode++;
 75		} else if (mode == 1 && *p == '\n') {
 76			*name = substr(t, p);
 77			p++;
 78			break;
 79		} else if (mode == 2 && *p == '>') {
 80			*email = substr(t, p + 1);
 81			t = p;
 82			mode++;
 83		} else if (mode == 2 && *p == '\n') {
 84			*email = substr(t, p);
 85			p++;
 86			break;
 87		} else if (mode == 3 && isdigit(*p)) {
 88			*date = atol(p);
 89			mode++;
 90		} else if (*p == '\n') {
 91			p++;
 92			break;
 93		}
 94		p++;
 95	}
 96	return p;
 97}
 98
 99const char *reencode(char **txt, const char *src_enc, const char *dst_enc)
100{
101	char *tmp;
102
103	if (!txt || !*txt || !src_enc || !dst_enc)
104		return *txt;
105
106	tmp = reencode_string(*txt, src_enc, dst_enc);
107	if (tmp) {
108		free(*txt);
109		*txt = tmp;
110	}
111	return *txt;
112}
113
114struct commitinfo *cgit_parse_commit(struct commit *commit)
115{
116	struct commitinfo *ret;
117	char *p = commit->buffer, *t = commit->buffer;
118
119	ret = xmalloc(sizeof(*ret));
120	ret->commit = commit;
121	ret->author = NULL;
122	ret->author_email = NULL;
123	ret->committer = NULL;
124	ret->committer_email = NULL;
125	ret->subject = NULL;
126	ret->msg = NULL;
127	ret->msg_encoding = NULL;
128
129	if (p == NULL)
130		return ret;
131
132	if (strncmp(p, "tree ", 5))
133		die("Bad commit: %s", sha1_to_hex(commit->object.sha1));
134	else
135		p += 46; // "tree " + hex[40] + "\n"
136
137	while (!strncmp(p, "parent ", 7))
138		p += 48; // "parent " + hex[40] + "\n"
139
140	if (p && !strncmp(p, "author ", 7)) {
141		p = parse_user(p + 7, &ret->author, &ret->author_email,
142			&ret->author_date);
143	}
144
145	if (p && !strncmp(p, "committer ", 9)) {
146		p = parse_user(p + 9, &ret->committer, &ret->committer_email,
147			&ret->committer_date);
148	}
149
150	if (p && !strncmp(p, "encoding ", 9)) {
151		p += 9;
152		t = strchr(p, '\n');
153		if (t) {
154			ret->msg_encoding = substr(p, t + 1);
155			p = t + 1;
156		}
157	}
158
159	// skip unknown header fields
160	while (p && *p && (*p != '\n')) {
161		p = strchr(p, '\n');
162		if (p)
163			p++;
164	}
165
166	// skip empty lines between headers and message
167	while (p && *p == '\n')
168		p++;
169
170	if (!p)
171		return ret;
172
173	t = strchr(p, '\n');
174	if (t) {
175		ret->subject = substr(p, t);
176		p = t + 1;
177
178		while (p && *p == '\n') {
179			p = strchr(p, '\n');
180			if (p)
181				p++;
182		}
183		if (p)
184			ret->msg = xstrdup(p);
185	} else
186		ret->subject = xstrdup(p);
187
188	if (ret->msg_encoding) {
189		reencode(&ret->subject, PAGE_ENCODING, ret->msg_encoding);
190		reencode(&ret->msg, PAGE_ENCODING, ret->msg_encoding);
191	}
192
193	return ret;
194}
195
196
197struct taginfo *cgit_parse_tag(struct tag *tag)
198{
199	void *data;
200	enum object_type type;
201	unsigned long size;
202	char *p;
203	struct taginfo *ret;
204
205	data = read_sha1_file(tag->object.sha1, &type, &size);
206	if (!data || type != OBJ_TAG) {
207		free(data);
208		return 0;
209	}
210
211	ret = xmalloc(sizeof(*ret));
212	ret->tagger = NULL;
213	ret->tagger_email = NULL;
214	ret->tagger_date = 0;
215	ret->msg = NULL;
216
217	p = data;
218
219	while (p && *p) {
220		if (*p == '\n')
221			break;
222
223		if (!strncmp(p, "tagger ", 7)) {
224			p = parse_user(p + 7, &ret->tagger, &ret->tagger_email,
225				&ret->tagger_date);
226		} else {
227			p = strchr(p, '\n');
228			if (p)
229				p++;
230		}
231	}
232
233	// skip empty lines between headers and message
234	while (p && *p == '\n')
235		p++;
236
237	if (p && *p)
238		ret->msg = xstrdup(p);
239	free(data);
240	return ret;
241}