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->max_stats = ctx.cfg.max_stats;
  62         ret->module_link = ctx.cfg.module_link;
  63         ret->readme = NULL;
  64         ret->mtime = -1;
  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 char *trim_end(const char *str, char c)
  95 {
  96         int len;
  97         char *s, *t;
  98
  99         if (str == NULL)
 100                 return NULL;
 101         t = (char *)str;
 102         len = strlen(t);
 103         while(len > 0 && t[len - 1] == c)
 104                 len--;
 105
 106         if (len == 0)
 107                 return NULL;
 108
 109         c = t[len];
 110         t[len] = '\0';
 111         s = xstrdup(t);
 112         t[len] = c;
 113         return s;
 114 }
 115
 116 char *strlpart(char *txt, int maxlen)
 117 {
 118         char *result;
 119
 120         if (!txt)
 121                 return txt;
 122
 123         if (strlen(txt) <= maxlen)
 124                 return txt;
 125         result = xmalloc(maxlen + 1);
 126         memcpy(result, txt, maxlen - 3);
 127         result[maxlen-1] = result[maxlen-2] = result[maxlen-3] = '.';
 128         result[maxlen] = '\0';
 129         return result;
 130 }
 131
 132 char *strrpart(char *txt, int maxlen)
 133 {
 134         char *result;
 135
 136         if (!txt)
 137                 return txt;
 138
 139         if (strlen(txt) <= maxlen)
 140                 return txt;
 141         result = xmalloc(maxlen + 1);
 142         memcpy(result + 3, txt + strlen(txt) - maxlen + 4, maxlen - 3);
 143         result[0] = result[1] = result[2] = '.';
 144         return result;
 145 }
 146
 147 void cgit_add_ref(struct reflist *list, struct refinfo *ref)
 148 {
 149         size_t size;
 150
 151         if (list->count >= list->alloc) {
 152                 list->alloc += (list->alloc ? list->alloc : 4);
 153                 size = list->alloc * sizeof(struct refinfo *);
 154                 list->refs = xrealloc(list->refs, size);
 155         }
 156         list->refs[list->count++] = ref;
 157 }
 158
 159 struct refinfo *cgit_mk_refinfo(const char *refname, const unsigned char *sha1)
 160 {
 161         struct refinfo *ref;
 162
 163         ref = xmalloc(sizeof (struct refinfo));
 164         ref->refname = xstrdup(refname);
 165         ref->object = parse_object(sha1);
 166         switch (ref->object->type) {
 167         case OBJ_TAG:
 168                 ref->tag = cgit_parse_tag((struct tag *)ref->object);
 169                 break;
 170         case OBJ_COMMIT:
 171                 ref->commit = cgit_parse_commit((struct commit *)ref->object);
 172                 break;
 173         }
 174         return ref;
 175 }
 176
 177 int cgit_refs_cb(const char *refname, const unsigned char *sha1, int flags,
 178                   void *cb_data)
 179 {
 180         struct reflist *list = (struct reflist *)cb_data;
 181         struct refinfo *info = cgit_mk_refinfo(refname, sha1);
 182
 183         if (info)
 184                 cgit_add_ref(list, info);
 185         return 0;
 186 }
 187
 188 void cgit_diff_tree_cb(struct diff_queue_struct *q,
 189                        struct diff_options *options, void *data)
 190 {
 191         int i;
 192
 193         for (i = 0; i < q->nr; i++) {
 194                 if (q->queue[i]->status == 'U')
 195                         continue;
 196                 ((filepair_fn)data)(q->queue[i]);
 197         }
 198 }
 199
 200 static int load_mmfile(mmfile_t *file, const unsigned char *sha1)
 201 {
 202         enum object_type type;
 203
 204         if (is_null_sha1(sha1)) {
 205                 file->ptr = (char *)"";
 206                 file->size = 0;
 207         } else {
 208                 file->ptr = read_sha1_file(sha1, &type,
 209                                            (unsigned long *)&file->size);
 210         }
 211         return 1;
 212 }
 213
 214 /*
 215  * Receive diff-buffers from xdiff and concatenate them as
 216  * needed across multiple callbacks.
 217  *
 218  * This is basically a copy of xdiff-interface.c/xdiff_outf(),
 219  * ripped from git and modified to use globals instead of
 220  * a special callback-struct.
 221  */
 222 char *diffbuf = NULL;
 223 int buflen = 0;
 224
 225 int filediff_cb(void *priv, mmbuffer_t *mb, int nbuf)
 226 {
 227         int i;
 228
 229         for (i = 0; i < nbuf; i++) {
 230                 if (mb[i].ptr[mb[i].size-1] != '\n') {
 231                         /* Incomplete line */
 232                         diffbuf = xrealloc(diffbuf, buflen + mb[i].size);
 233                         memcpy(diffbuf + buflen, mb[i].ptr, mb[i].size);
 234                         buflen += mb[i].size;
 235                         continue;
 236                 }
 237
 238                 /* we have a complete line */
 239                 if (!diffbuf) {
 240                         ((linediff_fn)priv)(mb[i].ptr, mb[i].size);
 241                         continue;
 242                 }
 243                 diffbuf = xrealloc(diffbuf, buflen + mb[i].size);
 244                 memcpy(diffbuf + buflen, mb[i].ptr, mb[i].size);
 245                 ((linediff_fn)priv)(diffbuf, buflen + mb[i].size);
 246                 free(diffbuf);
 247                 diffbuf = NULL;
 248                 buflen = 0;
 249         }
 250         if (diffbuf) {
 251                 ((linediff_fn)priv)(diffbuf, buflen);
 252                 free(diffbuf);
 253                 diffbuf = NULL;
 254                 buflen = 0;
 255         }
 256         return 0;
 257 }
 258
 259 int cgit_diff_files(const unsigned char *old_sha1,
 260                     const unsigned char *new_sha1, unsigned long *old_size,
 261                     unsigned long *new_size, int *binary, linediff_fn fn)
 262 {
 263         mmfile_t file1, file2;
 264         xpparam_t diff_params;
 265         xdemitconf_t emit_params;
 266         xdemitcb_t emit_cb;
 267
 268         if (!load_mmfile(&file1, old_sha1) || !load_mmfile(&file2, new_sha1))
 269                 return 1;
 270
 271         *old_size = file1.size;
 272         *new_size = file2.size;
 273
 274         if ((file1.ptr && buffer_is_binary(file1.ptr, file1.size)) ||
 275             (file2.ptr && buffer_is_binary(file2.ptr, file2.size))) {
 276                 *binary = 1;
 277                 return 0;
 278         }
 279
 280         memset(&diff_params, 0, sizeof(diff_params));
 281         memset(&emit_params, 0, sizeof(emit_params));
 282         memset(&emit_cb, 0, sizeof(emit_cb));
 283         diff_params.flags = XDF_NEED_MINIMAL;
 284         emit_params.ctxlen = 3;
 285         emit_params.flags = XDL_EMIT_FUNCNAMES;
 286         emit_cb.outf = filediff_cb;
 287         emit_cb.priv = fn;
 288         xdl_diff(&file1, &file2, &diff_params, &emit_params, &emit_cb);
 289         return 0;
 290 }
 291
 292 void cgit_diff_tree(const unsigned char *old_sha1,
 293                     const unsigned char *new_sha1,
 294                     filepair_fn fn, const char *prefix)
 295 {
 296         struct diff_options opt;
 297         int ret;
 298         int prefixlen;
 299
 300         diff_setup(&opt);
 301         opt.output_format = DIFF_FORMAT_CALLBACK;
 302         opt.detect_rename = 1;
 303         opt.rename_limit = ctx.cfg.renamelimit;
 304         DIFF_OPT_SET(&opt, RECURSIVE);
 305         opt.format_callback = cgit_diff_tree_cb;
 306         opt.format_callback_data = fn;
 307         if (prefix) {
 308                 opt.nr_paths = 1;
 309                 opt.paths = &prefix;
 310                 prefixlen = strlen(prefix);
 311                 opt.pathlens = &prefixlen;
 312         }
 313         diff_setup_done(&opt);
 314
 315         if (old_sha1 && !is_null_sha1(old_sha1))
 316                 ret = diff_tree_sha1(old_sha1, new_sha1, "", &opt);
 317         else
 318                 ret = diff_root_tree_sha1(new_sha1, "", &opt);
 319         diffcore_std(&opt);
 320         diff_flush(&opt);
 321 }
 322
 323 void cgit_diff_commit(struct commit *commit, filepair_fn fn)
 324 {
 325         unsigned char *old_sha1 = NULL;
 326
 327         if (commit->parents)
 328                 old_sha1 = commit->parents->item->object.sha1;
 329         cgit_diff_tree(old_sha1, commit->object.sha1, fn, NULL);
 330 }
 331
 332 int cgit_parse_snapshots_mask(const char *str)
 333 {
 334         const struct cgit_snapshot_format *f;
 335         static const char *delim = " \t,:/|;";
 336         int tl, sl, rv = 0;
 337
 338         /* favor legacy setting */
 339         if(atoi(str))
 340                 return 1;
 341         for(;;) {
 342                 str += strspn(str,delim);
 343                 tl = strcspn(str,delim);
 344                 if (!tl)
 345                         break;
 346                 for (f = cgit_snapshot_formats; f->suffix; f++) {
 347                         sl = strlen(f->suffix);
 348                         if((tl == sl && !strncmp(f->suffix, str, tl)) ||
 349                            (tl == sl-1 && !strncmp(f->suffix+1, str, tl-1))) {
 350                                 rv |= f->bit;
 351                                 break;
 352                         }
 353                 }
 354                 str += tl;
 355         }
 356         return rv;
 357 }