parsing.c

   1 /* parsing.c: parsing of config files
   2  *
   3  * Copyright (C) 2006-2014 cgit Development Team <cgit@lists.zx2c4.com>
   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  */
  18 void cgit_parse_url(const char *url)
  19 {
  20         char *c, *cmd, *p;
  21         struct cgit_repo *repo;
  22
  23         if (!url || url[0] == '\0')
  24                 return;
  25
  26         ctx.qry.page = NULL;
  27         ctx.repo = cgit_get_repoinfo(url);
  28         if (ctx.repo) {
  29                 ctx.qry.repo = ctx.repo->url;
  30                 return;
  31         }
  32
  33         cmd = NULL;
  34         c = strchr(url, '/');
  35         while (c) {
  36                 c[0] = '\0';
  37                 repo = cgit_get_repoinfo(url);
  38                 if (repo) {
  39                         ctx.repo = repo;
  40                         cmd = c;
  41                 }
  42                 c[0] = '/';
  43                 c = strchr(c + 1, '/');
  44         }
  45
  46         if (ctx.repo) {
  47                 ctx.qry.repo = ctx.repo->url;
  48                 p = strchr(cmd + 1, '/');
  49                 if (p) {
  50                         p[0] = '\0';
  51                         if (p[1])
  52                                 ctx.qry.path = trim_end(p + 1, '/');
  53                 }
  54                 if (cmd[1])
  55                         ctx.qry.page = xstrdup(cmd + 1);
  56         }
  57 }
  58
  59 static char *substr(const char *head, const char *tail)
  60 {
  61         char *buf;
  62
  63         if (tail < head)
  64                 return xstrdup("");
  65         buf = xmalloc(tail - head + 1);
  66         strncpy(buf, head, tail - head);
  67         buf[tail - head] = '\0';
  68         return buf;
  69 }
  70
  71 static void parse_user(const char *t, char **name, char **email, unsigned long *date, int *tz)
  72 {
  73         struct ident_split ident;
  74         unsigned email_len;
  75
  76         if (!split_ident_line(&ident, t, strchrnul(t, '\n') - t)) {
  77                 *name = substr(ident.name_begin, ident.name_end);
  78
  79                 email_len = ident.mail_end - ident.mail_begin;
  80                 *email = xmalloc(strlen("<") + email_len + strlen(">") + 1);
  81                 sprintf(*email, "<%.*s>", email_len, ident.mail_begin);
  82
  83                 if (ident.date_begin)
  84                         *date = strtoul(ident.date_begin, NULL, 10);
  85                 if (ident.tz_begin)
  86                         *tz = atoi(ident.tz_begin);
  87         }
  88 }
  89
  90 #ifdef NO_ICONV
  91 #define reencode(a, b, c)
  92 #else
  93 static const char *reencode(char **txt, const char *src_enc, const char *dst_enc)
  94 {
  95         char *tmp;
  96
  97         if (!txt)
  98                 return NULL;
  99
 100         if (!*txt || !src_enc || !dst_enc)
 101                 return *txt;
 102
 103         /* no encoding needed if src_enc equals dst_enc */
 104         if (!strcasecmp(src_enc, dst_enc))
 105                 return *txt;
 106
 107         tmp = reencode_string(*txt, dst_enc, src_enc);
 108         if (tmp) {
 109                 free(*txt);
 110                 *txt = tmp;
 111         }
 112         return *txt;
 113 }
 114 #endif
 115
 116 static const char *next_header_line(const char *p)
 117 {
 118         p = strchr(p, '\n');
 119         if (!p)
 120                 return NULL;
 121         return p + 1;
 122 }
 123
 124 static int end_of_header(const char *p)
 125 {
 126         return !p || (*p == '\n');
 127 }
 128
 129 struct commitinfo *cgit_parse_commit(struct commit *commit)
 130 {
 131         const int sha1hex_len = 40;
 132         struct commitinfo *ret;
 133         const char *p = get_cached_commit_buffer(commit, NULL);
 134         const char *t;
 135
 136         ret = xcalloc(1, sizeof(struct commitinfo));
 137         ret->commit = commit;
 138
 139         if (!p)
 140                 return ret;
 141
 142         if (!skip_prefix(p, "tree ", &p))
 143                 die("Bad commit: %s", oid_to_hex(&commit->object.oid));
 144         p += sha1hex_len + 1;
 145
 146         while (skip_prefix(p, "parent ", &p))
 147                 p += sha1hex_len + 1;
 148
 149         if (p && skip_prefix(p, "author ", &p)) {
 150                 parse_user(p, &ret->author, &ret->author_email,
 151                         &ret->author_date, &ret->author_tz);
 152                 p = next_header_line(p);
 153         }
 154
 155         if (p && skip_prefix(p, "committer ", &p)) {
 156                 parse_user(p, &ret->committer, &ret->committer_email,
 157                         &ret->committer_date, &ret->committer_tz);
 158                 p = next_header_line(p);
 159         }
 160
 161         if (p && skip_prefix(p, "encoding ", &p)) {
 162                 t = strchr(p, '\n');
 163                 if (t) {
 164                         ret->msg_encoding = substr(p, t + 1);
 165                         p = t + 1;
 166                 }
 167         }
 168
 169         if (!ret->msg_encoding)
 170                 ret->msg_encoding = xstrdup("UTF-8");
 171
 172         while (!end_of_header(p))
 173                 p = next_header_line(p);
 174         while (p && *p == '\n')
 175                 p++;
 176         if (!p)
 177                 return ret;
 178
 179         t = strchrnul(p, '\n');
 180         ret->subject = substr(p, t);
 181         while (*t == '\n')
 182                 t++;
 183         ret->msg = xstrdup(t);
 184
 185         reencode(&ret->author, ret->msg_encoding, PAGE_ENCODING);
 186         reencode(&ret->author_email, ret->msg_encoding, PAGE_ENCODING);
 187         reencode(&ret->committer, ret->msg_encoding, PAGE_ENCODING);
 188         reencode(&ret->committer_email, ret->msg_encoding, PAGE_ENCODING);
 189         reencode(&ret->subject, ret->msg_encoding, PAGE_ENCODING);
 190         reencode(&ret->msg, ret->msg_encoding, PAGE_ENCODING);
 191
 192         return ret;
 193 }
 194
 195 struct taginfo *cgit_parse_tag(struct tag *tag)
 196 {
 197         void *data;
 198         enum object_type type;
 199         unsigned long size;
 200         const char *p;
 201         struct taginfo *ret = NULL;
 202
 203         data = read_sha1_file(tag->object.oid.hash, &type, &size);
 204         if (!data || type != OBJ_TAG)
 205                 goto cleanup;
 206
 207         ret = xcalloc(1, sizeof(struct taginfo));
 208
 209         for (p = data; !end_of_header(p); p = next_header_line(p)) {
 210                 if (skip_prefix(p, "tagger ", &p)) {
 211                         parse_user(p, &ret->tagger, &ret->tagger_email,
 212                                 &ret->tagger_date, &ret->tagger_tz);
 213                 }
 214         }
 215
 216         while (p && *p == '\n')
 217                 p++;
 218
 219         if (p && *p)
 220                 ret->msg = xstrdup(p);
 221
 222 cleanup:
 223         free(data);
 224         return ret;
 225 }