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Move cgit_version from shared.c to cgit.c
[ps-cgit] / shared.c
1 /* shared.c: global vars + some callback functions
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 struct cgit_repolist cgit_repolist;
12 struct cgit_context ctx;
13 int cgit_cmd;
14
15 int chk_zero(int result, char *msg)
16 {
17         if (result != 0)
18                 die("%s: %s", msg, strerror(errno));
19         return result;
20 }
21
22 int chk_positive(int result, char *msg)
23 {
24         if (result <= 0)
25                 die("%s: %s", msg, strerror(errno));
26         return result;
27 }
28
29 int chk_non_negative(int result, char *msg)
30 {
31         if (result < 0)
32                 die("%s: %s",msg, strerror(errno));
33         return result;
34 }
35
36 struct cgit_repo *cgit_add_repo(const char *url)
37 {
38         struct cgit_repo *ret;
39
40         if (++cgit_repolist.count > cgit_repolist.length) {
41                 if (cgit_repolist.length == 0)
42                         cgit_repolist.length = 8;
43                 else
44                         cgit_repolist.length *= 2;
45                 cgit_repolist.repos = xrealloc(cgit_repolist.repos,
46                                                cgit_repolist.length *
47                                                sizeof(struct cgit_repo));
48         }
49
50         ret = &cgit_repolist.repos[cgit_repolist.count-1];
51         ret->url = trim_end(url, '/');
52         ret->name = ret->url;
53         ret->path = NULL;
54         ret->desc = "[no description]";
55         ret->owner = NULL;
56         ret->group = ctx.cfg.repo_group;
57         ret->defbranch = "master";
58         ret->snapshots = ctx.cfg.snapshots;
59         ret->enable_log_filecount = ctx.cfg.enable_log_filecount;
60         ret->enable_log_linecount = ctx.cfg.enable_log_linecount;
61         ret->module_link = ctx.cfg.module_link;
62         ret->readme = NULL;
63         return ret;
64 }
65
66 struct cgit_repo *cgit_get_repoinfo(const char *url)
67 {
68         int i;
69         struct cgit_repo *repo;
70
71         for (i=0; i<cgit_repolist.count; i++) {
72                 repo = &cgit_repolist.repos[i];
73                 if (!strcmp(repo->url, url))
74                         return repo;
75         }
76         return NULL;
77 }
78
79 void *cgit_free_commitinfo(struct commitinfo *info)
80 {
81         free(info->author);
82         free(info->author_email);
83         free(info->committer);
84         free(info->committer_email);
85         free(info->subject);
86         free(info->msg);
87         free(info->msg_encoding);
88         free(info);
89         return NULL;
90 }
91
92 int hextoint(char c)
93 {
94         if (c >= 'a' && c <= 'f')
95                 return 10 + c - 'a';
96         else if (c >= 'A' && c <= 'F')
97                 return 10 + c - 'A';
98         else if (c >= '0' && c <= '9')
99                 return c - '0';
100         else
101                 return -1;
102 }
103
104 char *trim_end(const char *str, char c)
105 {
106         int len;
107         char *s, *t;
108
109         if (str == NULL)
110                 return NULL;
111         t = (char *)str;
112         len = strlen(t);
113         while(len > 0 && t[len - 1] == c)
114                 len--;
115
116         if (len == 0)
117                 return NULL;
118
119         c = t[len];
120         t[len] = '\0';
121         s = xstrdup(t);
122         t[len] = c;
123         return s;
124 }
125
126 char *strlpart(char *txt, int maxlen)
127 {
128         char *result;
129
130         if (!txt)
131                 return txt;
132
133         if (strlen(txt) <= maxlen)
134                 return txt;
135         result = xmalloc(maxlen + 1);
136         memcpy(result, txt, maxlen - 3);
137         result[maxlen-1] = result[maxlen-2] = result[maxlen-3] = '.';
138         result[maxlen] = '\0';
139         return result;
140 }
141
142 char *strrpart(char *txt, int maxlen)
143 {
144         char *result;
145
146         if (!txt)
147                 return txt;
148
149         if (strlen(txt) <= maxlen)
150                 return txt;
151         result = xmalloc(maxlen + 1);
152         memcpy(result + 3, txt + strlen(txt) - maxlen + 4, maxlen - 3);
153         result[0] = result[1] = result[2] = '.';
154         return result;
155 }
156
157 void cgit_add_ref(struct reflist *list, struct refinfo *ref)
158 {
159         size_t size;
160
161         if (list->count >= list->alloc) {
162                 list->alloc += (list->alloc ? list->alloc : 4);
163                 size = list->alloc * sizeof(struct refinfo *);
164                 list->refs = xrealloc(list->refs, size);
165         }
166         list->refs[list->count++] = ref;
167 }
168
169 struct refinfo *cgit_mk_refinfo(const char *refname, const unsigned char *sha1)
170 {
171         struct refinfo *ref;
172
173         ref = xmalloc(sizeof (struct refinfo));
174         ref->refname = xstrdup(refname);
175         ref->object = parse_object(sha1);
176         switch (ref->object->type) {
177         case OBJ_TAG:
178                 ref->tag = cgit_parse_tag((struct tag *)ref->object);
179                 break;
180         case OBJ_COMMIT:
181                 ref->commit = cgit_parse_commit((struct commit *)ref->object);
182                 break;
183         }
184         return ref;
185 }
186
187 int cgit_refs_cb(const char *refname, const unsigned char *sha1, int flags,
188                   void *cb_data)
189 {
190         struct reflist *list = (struct reflist *)cb_data;
191         struct refinfo *info = cgit_mk_refinfo(refname, sha1);
192
193         if (info)
194                 cgit_add_ref(list, info);
195         return 0;
196 }
197
198 void cgit_diff_tree_cb(struct diff_queue_struct *q,
199                        struct diff_options *options, void *data)
200 {
201         int i;
202
203         for (i = 0; i < q->nr; i++) {
204                 if (q->queue[i]->status == 'U')
205                         continue;
206                 ((filepair_fn)data)(q->queue[i]);
207         }
208 }
209
210 static int load_mmfile(mmfile_t *file, const unsigned char *sha1)
211 {
212         enum object_type type;
213
214         if (is_null_sha1(sha1)) {
215                 file->ptr = (char *)"";
216                 file->size = 0;
217         } else {
218                 file->ptr = read_sha1_file(sha1, &type, 
219                                            (unsigned long *)&file->size);
220         }
221         return 1;
222 }
223
224 /*
225  * Receive diff-buffers from xdiff and concatenate them as
226  * needed across multiple callbacks.
227  *
228  * This is basically a copy of xdiff-interface.c/xdiff_outf(),
229  * ripped from git and modified to use globals instead of
230  * a special callback-struct.
231  */
232 char *diffbuf = NULL;
233 int buflen = 0;
234
235 int filediff_cb(void *priv, mmbuffer_t *mb, int nbuf)
236 {
237         int i;
238
239         for (i = 0; i < nbuf; i++) {
240                 if (mb[i].ptr[mb[i].size-1] != '\n') {
241                         /* Incomplete line */
242                         diffbuf = xrealloc(diffbuf, buflen + mb[i].size);
243                         memcpy(diffbuf + buflen, mb[i].ptr, mb[i].size);
244                         buflen += mb[i].size;
245                         continue;
246                 }
247
248                 /* we have a complete line */
249                 if (!diffbuf) {
250                         ((linediff_fn)priv)(mb[i].ptr, mb[i].size);
251                         continue;
252                 }
253                 diffbuf = xrealloc(diffbuf, buflen + mb[i].size);
254                 memcpy(diffbuf + buflen, mb[i].ptr, mb[i].size);
255                 ((linediff_fn)priv)(diffbuf, buflen + mb[i].size);
256                 free(diffbuf);
257                 diffbuf = NULL;
258                 buflen = 0;
259         }
260         if (diffbuf) {
261                 ((linediff_fn)priv)(diffbuf, buflen);
262                 free(diffbuf);
263                 diffbuf = NULL;
264                 buflen = 0;
265         }
266         return 0;
267 }
268
269 int cgit_diff_files(const unsigned char *old_sha1,
270                      const unsigned char *new_sha1,
271                      linediff_fn fn)
272 {
273         mmfile_t file1, file2;
274         xpparam_t diff_params;
275         xdemitconf_t emit_params;
276         xdemitcb_t emit_cb;
277
278         if (!load_mmfile(&file1, old_sha1) || !load_mmfile(&file2, new_sha1))
279                 return 1;
280
281         diff_params.flags = XDF_NEED_MINIMAL;
282         emit_params.ctxlen = 3;
283         emit_params.flags = XDL_EMIT_FUNCNAMES;
284         emit_params.find_func = NULL;
285         emit_cb.outf = filediff_cb;
286         emit_cb.priv = fn;
287         xdl_diff(&file1, &file2, &diff_params, &emit_params, &emit_cb);
288         return 0;
289 }
290
291 void cgit_diff_tree(const unsigned char *old_sha1,
292                     const unsigned char *new_sha1,
293                     filepair_fn fn, const char *prefix)
294 {
295         struct diff_options opt;
296         int ret;
297         int prefixlen;
298
299         diff_setup(&opt);
300         opt.output_format = DIFF_FORMAT_CALLBACK;
301         opt.detect_rename = 1;
302         opt.rename_limit = ctx.cfg.renamelimit;
303         DIFF_OPT_SET(&opt, RECURSIVE);
304         opt.format_callback = cgit_diff_tree_cb;
305         opt.format_callback_data = fn;
306         if (prefix) {
307                 opt.nr_paths = 1;
308                 opt.paths = &prefix;
309                 prefixlen = strlen(prefix);
310                 opt.pathlens = &prefixlen;
311         }
312         diff_setup_done(&opt);
313
314         if (old_sha1 && !is_null_sha1(old_sha1))
315                 ret = diff_tree_sha1(old_sha1, new_sha1, "", &opt);
316         else
317                 ret = diff_root_tree_sha1(new_sha1, "", &opt);
318         diffcore_std(&opt);
319         diff_flush(&opt);
320 }
321
322 void cgit_diff_commit(struct commit *commit, filepair_fn fn)
323 {
324         unsigned char *old_sha1 = NULL;
325
326         if (commit->parents)
327                 old_sha1 = commit->parents->item->object.sha1;
328         cgit_diff_tree(old_sha1, commit->object.sha1, fn, NULL);
329 }
330
331 int cgit_parse_snapshots_mask(const char *str)
332 {
333         const struct cgit_snapshot_format *f;
334         static const char *delim = " \t,:/|;";
335         int tl, sl, rv = 0;
336
337         /* favor legacy setting */
338         if(atoi(str))
339                 return 1;
340         for(;;) {
341                 str += strspn(str,delim);
342                 tl = strcspn(str,delim);
343                 if (!tl)
344                         break;
345                 for (f = cgit_snapshot_formats; f->suffix; f++) {
346                         sl = strlen(f->suffix);
347                         if((tl == sl && !strncmp(f->suffix, str, tl)) ||
348                            (tl == sl-1 && !strncmp(f->suffix+1, str, tl-1))) {
349                                 rv |= f->bit;
350                                 break;
351                         }
352                 }
353                 str += tl;
354         }
355         return rv;
356 }