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 const char *cgit_version = CGIT_VERSION;
  16
  17 int chk_zero(int result, char *msg)
  18 {
  19         if (result != 0)
  20                 die("%s: %s", msg, strerror(errno));
  21         return result;
  22 }
  23
  24 int chk_positive(int result, char *msg)
  25 {
  26         if (result <= 0)
  27                 die("%s: %s", msg, strerror(errno));
  28         return result;
  29 }
  30
  31 int chk_non_negative(int result, char *msg)
  32 {
  33         if (result < 0)
  34                 die("%s: %s",msg, strerror(errno));
  35         return result;
  36 }
  37
  38 struct cgit_repo *cgit_add_repo(const char *url)
  39 {
  40         struct cgit_repo *ret;
  41
  42         if (++cgit_repolist.count > cgit_repolist.length) {
  43                 if (cgit_repolist.length == 0)
  44                         cgit_repolist.length = 8;
  45                 else
  46                         cgit_repolist.length *= 2;
  47                 cgit_repolist.repos = xrealloc(cgit_repolist.repos,
  48                                                cgit_repolist.length *
  49                                                sizeof(struct cgit_repo));
  50         }
  51
  52         ret = &cgit_repolist.repos[cgit_repolist.count-1];
  53         ret->url = trim_end(url, '/');
  54         ret->name = ret->url;
  55         ret->path = NULL;
  56         ret->desc = "[no description]";
  57         ret->owner = NULL;
  58         ret->group = ctx.cfg.repo_group;
  59         ret->defbranch = "master";
  60         ret->snapshots = ctx.cfg.snapshots;
  61         ret->enable_log_filecount = ctx.cfg.enable_log_filecount;
  62         ret->enable_log_linecount = ctx.cfg.enable_log_linecount;
  63         ret->module_link = ctx.cfg.module_link;
  64         ret->readme = NULL;
  65         return ret;
  66 }
  67
  68 struct cgit_repo *cgit_get_repoinfo(const char *url)
  69 {
  70         int i;
  71         struct cgit_repo *repo;
  72
  73         for (i=0; i<cgit_repolist.count; i++) {
  74                 repo = &cgit_repolist.repos[i];
  75                 if (!strcmp(repo->url, url))
  76                         return repo;
  77         }
  78         return NULL;
  79 }
  80
  81 void *cgit_free_commitinfo(struct commitinfo *info)
  82 {
  83         free(info->author);
  84         free(info->author_email);
  85         free(info->committer);
  86         free(info->committer_email);
  87         free(info->subject);
  88         free(info->msg);
  89         free(info->msg_encoding);
  90         free(info);
  91         return NULL;
  92 }
  93
  94 int hextoint(char c)
  95 {
  96         if (c >= 'a' && c <= 'f')
  97                 return 10 + c - 'a';
  98         else if (c >= 'A' && c <= 'F')
  99                 return 10 + c - 'A';
 100         else if (c >= '0' && c <= '9')
 101                 return c - '0';
 102         else
 103                 return -1;
 104 }
 105
 106 char *trim_end(const char *str, char c)
 107 {
 108         int len;
 109         char *s, *t;
 110
 111         if (str == NULL)
 112                 return NULL;
 113         t = (char *)str;
 114         len = strlen(t);
 115         while(len > 0 && t[len - 1] == c)
 116                 len--;
 117
 118         if (len == 0)
 119                 return NULL;
 120
 121         c = t[len];
 122         t[len] = '\0';
 123         s = xstrdup(t);
 124         t[len] = c;
 125         return s;
 126 }
 127
 128 char *strlpart(char *txt, int maxlen)
 129 {
 130         char *result;
 131
 132         if (!txt)
 133                 return txt;
 134
 135         if (strlen(txt) <= maxlen)
 136                 return txt;
 137         result = xmalloc(maxlen + 1);
 138         memcpy(result, txt, maxlen - 3);
 139         result[maxlen-1] = result[maxlen-2] = result[maxlen-3] = '.';
 140         result[maxlen] = '\0';
 141         return result;
 142 }
 143
 144 char *strrpart(char *txt, int maxlen)
 145 {
 146         char *result;
 147
 148         if (!txt)
 149                 return txt;
 150
 151         if (strlen(txt) <= maxlen)
 152                 return txt;
 153         result = xmalloc(maxlen + 1);
 154         memcpy(result + 3, txt + strlen(txt) - maxlen + 4, maxlen - 3);
 155         result[0] = result[1] = result[2] = '.';
 156         return result;
 157 }
 158
 159 void cgit_add_ref(struct reflist *list, struct refinfo *ref)
 160 {
 161         size_t size;
 162
 163         if (list->count >= list->alloc) {
 164                 list->alloc += (list->alloc ? list->alloc : 4);
 165                 size = list->alloc * sizeof(struct refinfo *);
 166                 list->refs = xrealloc(list->refs, size);
 167         }
 168         list->refs[list->count++] = ref;
 169 }
 170
 171 struct refinfo *cgit_mk_refinfo(const char *refname, const unsigned char *sha1)
 172 {
 173         struct refinfo *ref;
 174
 175         ref = xmalloc(sizeof (struct refinfo));
 176         ref->refname = xstrdup(refname);
 177         ref->object = parse_object(sha1);
 178         switch (ref->object->type) {
 179         case OBJ_TAG:
 180                 ref->tag = cgit_parse_tag((struct tag *)ref->object);
 181                 break;
 182         case OBJ_COMMIT:
 183                 ref->commit = cgit_parse_commit((struct commit *)ref->object);
 184                 break;
 185         }
 186         return ref;
 187 }
 188
 189 int cgit_refs_cb(const char *refname, const unsigned char *sha1, int flags,
 190                   void *cb_data)
 191 {
 192         struct reflist *list = (struct reflist *)cb_data;
 193         struct refinfo *info = cgit_mk_refinfo(refname, sha1);
 194
 195         if (info)
 196                 cgit_add_ref(list, info);
 197         return 0;
 198 }
 199
 200 void cgit_diff_tree_cb(struct diff_queue_struct *q,
 201                        struct diff_options *options, void *data)
 202 {
 203         int i;
 204
 205         for (i = 0; i < q->nr; i++) {
 206                 if (q->queue[i]->status == 'U')
 207                         continue;
 208                 ((filepair_fn)data)(q->queue[i]);
 209         }
 210 }
 211
 212 static int load_mmfile(mmfile_t *file, const unsigned char *sha1)
 213 {
 214         enum object_type type;
 215
 216         if (is_null_sha1(sha1)) {
 217                 file->ptr = (char *)"";
 218                 file->size = 0;
 219         } else {
 220                 file->ptr = read_sha1_file(sha1, &type,
 221                                            (unsigned long *)&file->size);
 222         }
 223         return 1;
 224 }
 225
 226 /*
 227  * Receive diff-buffers from xdiff and concatenate them as
 228  * needed across multiple callbacks.
 229  *
 230  * This is basically a copy of xdiff-interface.c/xdiff_outf(),
 231  * ripped from git and modified to use globals instead of
 232  * a special callback-struct.
 233  */
 234 char *diffbuf = NULL;
 235 int buflen = 0;
 236
 237 int filediff_cb(void *priv, mmbuffer_t *mb, int nbuf)
 238 {
 239         int i;
 240
 241         for (i = 0; i < nbuf; i++) {
 242                 if (mb[i].ptr[mb[i].size-1] != '\n') {
 243                         /* Incomplete line */
 244                         diffbuf = xrealloc(diffbuf, buflen + mb[i].size);
 245                         memcpy(diffbuf + buflen, mb[i].ptr, mb[i].size);
 246                         buflen += mb[i].size;
 247                         continue;
 248                 }
 249
 250                 /* we have a complete line */
 251                 if (!diffbuf) {
 252                         ((linediff_fn)priv)(mb[i].ptr, mb[i].size);
 253                         continue;
 254                 }
 255                 diffbuf = xrealloc(diffbuf, buflen + mb[i].size);
 256                 memcpy(diffbuf + buflen, mb[i].ptr, mb[i].size);
 257                 ((linediff_fn)priv)(diffbuf, buflen + mb[i].size);
 258                 free(diffbuf);
 259                 diffbuf = NULL;
 260                 buflen = 0;
 261         }
 262         if (diffbuf) {
 263                 ((linediff_fn)priv)(diffbuf, buflen);
 264                 free(diffbuf);
 265                 diffbuf = NULL;
 266                 buflen = 0;
 267         }
 268         return 0;
 269 }
 270
 271 int cgit_diff_files(const unsigned char *old_sha1,
 272                      const unsigned char *new_sha1,
 273                      linediff_fn fn)
 274 {
 275         mmfile_t file1, file2;
 276         xpparam_t diff_params;
 277         xdemitconf_t emit_params;
 278         xdemitcb_t emit_cb;
 279
 280         if (!load_mmfile(&file1, old_sha1) || !load_mmfile(&file2, new_sha1))
 281                 return 1;
 282
 283         diff_params.flags = XDF_NEED_MINIMAL;
 284         emit_params.ctxlen = 3;
 285         emit_params.flags = XDL_EMIT_FUNCNAMES;
 286         emit_params.find_func = NULL;
 287         emit_cb.outf = filediff_cb;
 288         emit_cb.priv = fn;
 289         xdl_diff(&file1, &file2, &diff_params, &emit_params, &emit_cb);
 290         return 0;
 291 }
 292
 293 void cgit_diff_tree(const unsigned char *old_sha1,
 294                     const unsigned char *new_sha1,
 295                     filepair_fn fn, const char *prefix)
 296 {
 297         struct diff_options opt;
 298         int ret;
 299         int prefixlen;
 300
 301         diff_setup(&opt);
 302         opt.output_format = DIFF_FORMAT_CALLBACK;
 303         opt.detect_rename = 1;
 304         opt.rename_limit = ctx.cfg.renamelimit;
 305         DIFF_OPT_SET(&opt, RECURSIVE);
 306         opt.format_callback = cgit_diff_tree_cb;
 307         opt.format_callback_data = fn;
 308         if (prefix) {
 309                 opt.nr_paths = 1;
 310                 opt.paths = &prefix;
 311                 prefixlen = strlen(prefix);
 312                 opt.pathlens = &prefixlen;
 313         }
 314         diff_setup_done(&opt);
 315
 316         if (old_sha1 && !is_null_sha1(old_sha1))
 317                 ret = diff_tree_sha1(old_sha1, new_sha1, "", &opt);
 318         else
 319                 ret = diff_root_tree_sha1(new_sha1, "", &opt);
 320         diffcore_std(&opt);
 321         diff_flush(&opt);
 322 }
 323
 324 void cgit_diff_commit(struct commit *commit, filepair_fn fn)
 325 {
 326         unsigned char *old_sha1 = NULL;
 327
 328         if (commit->parents)
 329                 old_sha1 = commit->parents->item->object.sha1;
 330         cgit_diff_tree(old_sha1, commit->object.sha1, fn, NULL);
 331 }
 332
 333 int cgit_parse_snapshots_mask(const char *str)
 334 {
 335         const struct cgit_snapshot_format *f;
 336         static const char *delim = " \t,:/|;";
 337         int tl, sl, rv = 0;
 338
 339         /* favor legacy setting */
 340         if(atoi(str))
 341                 return 1;
 342         for(;;) {
 343                 str += strspn(str,delim);
 344                 tl = strcspn(str,delim);
 345                 if (!tl)
 346                         break;
 347                 for (f = cgit_snapshot_formats; f->suffix; f++) {
 348                         sl = strlen(f->suffix);
 349                         if((tl == sl && !strncmp(f->suffix, str, tl)) ||
 350                            (tl == sl-1 && !strncmp(f->suffix+1, str, tl-1))) {
 351                                 rv |= f->bit;
 352                                 break;
 353                         }
 354                 }
 355                 str += tl;
 356         }
 357         return rv;
 358 }