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
 99#ifdef NO_ICONV
100#define reencode(a, b, c)
101#else
102const char *reencode(char **txt, const char *src_enc, const char *dst_enc)
103{
104	char *tmp;
105
106	if (!txt || !*txt || !src_enc || !dst_enc)
107		return *txt;
108
109	tmp = reencode_string(*txt, src_enc, dst_enc);
110	if (tmp) {
111		free(*txt);
112		*txt = tmp;
113	}
114	return *txt;
115}
116#endif
117
118struct commitinfo *cgit_parse_commit(struct commit *commit)
119{
120	struct commitinfo *ret;
121	char *p = commit->buffer, *t = commit->buffer;
122
123	ret = xmalloc(sizeof(*ret));
124	ret->commit = commit;
125	ret->author = NULL;
126	ret->author_email = NULL;
127	ret->committer = NULL;
128	ret->committer_email = NULL;
129	ret->subject = NULL;
130	ret->msg = NULL;
131	ret->msg_encoding = NULL;
132
133	if (p == NULL)
134		return ret;
135
136	if (strncmp(p, "tree ", 5))
137		die("Bad commit: %s", sha1_to_hex(commit->object.sha1));
138	else
139		p += 46; // "tree " + hex[40] + "\n"
140
141	while (!strncmp(p, "parent ", 7))
142		p += 48; // "parent " + hex[40] + "\n"
143
144	if (p && !strncmp(p, "author ", 7)) {
145		p = parse_user(p + 7, &ret->author, &ret->author_email,
146			&ret->author_date);
147	}
148
149	if (p && !strncmp(p, "committer ", 9)) {
150		p = parse_user(p + 9, &ret->committer, &ret->committer_email,
151			&ret->committer_date);
152	}
153
154	if (p && !strncmp(p, "encoding ", 9)) {
155		p += 9;
156		t = strchr(p, '\n');
157		if (t) {
158			ret->msg_encoding = substr(p, t + 1);
159			p = t + 1;
160		}
161	}
162
163	// skip unknown header fields
164	while (p && *p && (*p != '\n')) {
165		p = strchr(p, '\n');
166		if (p)
167			p++;
168	}
169
170	// skip empty lines between headers and message
171	while (p && *p == '\n')
172		p++;
173
174	if (!p)
175		return ret;
176
177	t = strchr(p, '\n');
178	if (t) {
179		ret->subject = substr(p, t);
180		p = t + 1;
181
182		while (p && *p == '\n') {
183			p = strchr(p, '\n');
184			if (p)
185				p++;
186		}
187		if (p)
188			ret->msg = xstrdup(p);
189	} else
190		ret->subject = xstrdup(p);
191
192	if (ret->msg_encoding) {
193		reencode(&ret->subject, PAGE_ENCODING, ret->msg_encoding);
194		reencode(&ret->msg, PAGE_ENCODING, ret->msg_encoding);
195	}
196
197	return ret;
198}
199
200
201struct taginfo *cgit_parse_tag(struct tag *tag)
202{
203	void *data;
204	enum object_type type;
205	unsigned long size;
206	char *p;
207	struct taginfo *ret;
208
209	data = read_sha1_file(tag->object.sha1, &type, &size);
210	if (!data || type != OBJ_TAG) {
211		free(data);
212		return 0;
213	}
214
215	ret = xmalloc(sizeof(*ret));
216	ret->tagger = NULL;
217	ret->tagger_email = NULL;
218	ret->tagger_date = 0;
219	ret->msg = NULL;
220
221	p = data;
222
223	while (p && *p) {
224		if (*p == '\n')
225			break;
226
227		if (!strncmp(p, "tagger ", 7)) {
228			p = parse_user(p + 7, &ret->tagger, &ret->tagger_email,
229				&ret->tagger_date);
230		} else {
231			p = strchr(p, '\n');
232			if (p)
233				p++;
234		}
235	}
236
237	// skip empty lines between headers and message
238	while (p && *p == '\n')
239		p++;
240
241	if (p && *p)
242		ret->msg = xstrdup(p);
243	free(data);
244	return ret;
245}