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         ctx.repo = NULL;
  24         if (!url || url[0] == '\0')
  25                 return;
  26
  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                 return;
  57         }
  58 }
  59
  60 static char *substr(const char *head, const char *tail)
  61 {
  62         char *buf;
  63
  64         if (tail < head)
  65                 return xstrdup("");
  66         buf = xmalloc(tail - head + 1);
  67         strncpy(buf, head, tail - head);
  68         buf[tail - head] = '\0';
  69         return buf;
  70 }
  71
  72 static void parse_user(const char *t, char **name, char **email, unsigned long *date, int *tz)
  73 {
  74         struct ident_split ident;
  75         unsigned email_len;
  76
  77         if (!split_ident_line(&ident, t, strchrnul(t, '\n') - t)) {
  78                 *name = substr(ident.name_begin, ident.name_end);
  79
  80                 email_len = ident.mail_end - ident.mail_begin;
  81                 *email = xmalloc(strlen("<") + email_len + strlen(">") + 1);
  82                 sprintf(*email, "<%.*s>", email_len, ident.mail_begin);
  83
  84                 if (ident.date_begin)
  85                         *date = strtoul(ident.date_begin, NULL, 10);
  86                 if (ident.tz_begin)
  87                         *tz = atoi(ident.tz_begin);
  88         }
  89 }
  90
  91 #ifdef NO_ICONV
  92 #define reencode(a, b, c)
  93 #else
  94 static const char *reencode(char **txt, const char *src_enc, const char *dst_enc)
  95 {
  96         char *tmp;
  97
  98         if (!txt)
  99                 return NULL;
 100
 101         if (!*txt || !src_enc || !dst_enc)
 102                 return *txt;
 103
 104         /* no encoding needed if src_enc equals dst_enc */
 105         if (!strcasecmp(src_enc, dst_enc))
 106                 return *txt;
 107
 108         tmp = reencode_string(*txt, dst_enc, src_enc);
 109         if (tmp) {
 110                 free(*txt);
 111                 *txt = tmp;
 112         }
 113         return *txt;
 114 }
 115 #endif
 116
 117 static const char *next_header_line(const char *p)
 118 {
 119         p = strchr(p, '\n');
 120         if (!p)
 121                 return NULL;
 122         return p + 1;
 123 }
 124
 125 static int end_of_header(const char *p)
 126 {
 127         return !p || (*p == '\n');
 128 }
 129
 130 struct commitinfo *cgit_parse_commit(struct commit *commit)
 131 {
 132         const int sha1hex_len = 40;
 133         struct commitinfo *ret;
 134         const char *p = get_cached_commit_buffer(commit, NULL);
 135         const char *t;
 136
 137         ret = xcalloc(1, sizeof(struct commitinfo));
 138         ret->commit = commit;
 139
 140         if (!p)
 141                 return ret;
 142
 143         if (!skip_prefix(p, "tree ", &p))
 144                 die("Bad commit: %s", oid_to_hex(&commit->object.oid));
 145         p += sha1hex_len + 1;
 146
 147         while (skip_prefix(p, "parent ", &p))
 148                 p += sha1hex_len + 1;
 149
 150         if (p && skip_prefix(p, "author ", &p)) {
 151                 parse_user(p, &ret->author, &ret->author_email,
 152                         &ret->author_date, &ret->author_tz);
 153                 p = next_header_line(p);
 154         }
 155
 156         if (p && skip_prefix(p, "committer ", &p)) {
 157                 parse_user(p, &ret->committer, &ret->committer_email,
 158                         &ret->committer_date, &ret->committer_tz);
 159                 p = next_header_line(p);
 160         }
 161
 162         if (p && skip_prefix(p, "encoding ", &p)) {
 163                 t = strchr(p, '\n');
 164                 if (t) {
 165                         ret->msg_encoding = substr(p, t + 1);
 166                         p = t + 1;
 167                 }
 168         }
 169
 170         if (!ret->msg_encoding)
 171                 ret->msg_encoding = xstrdup("UTF-8");
 172
 173         while (!end_of_header(p))
 174                 p = next_header_line(p);
 175         while (p && *p == '\n')
 176                 p++;
 177         if (!p)
 178                 return ret;
 179
 180         t = strchrnul(p, '\n');
 181         ret->subject = substr(p, t);
 182         while (*t == '\n')
 183                 t++;
 184         ret->msg = xstrdup(t);
 185
 186         reencode(&ret->author, ret->msg_encoding, PAGE_ENCODING);
 187         reencode(&ret->author_email, ret->msg_encoding, PAGE_ENCODING);
 188         reencode(&ret->committer, ret->msg_encoding, PAGE_ENCODING);
 189         reencode(&ret->committer_email, ret->msg_encoding, PAGE_ENCODING);
 190         reencode(&ret->subject, ret->msg_encoding, PAGE_ENCODING);
 191         reencode(&ret->msg, ret->msg_encoding, PAGE_ENCODING);
 192
 193         return ret;
 194 }
 195
 196 struct taginfo *cgit_parse_tag(struct tag *tag)
 197 {
 198         void *data;
 199         enum object_type type;
 200         unsigned long size;
 201         const char *p;
 202         struct taginfo *ret = NULL;
 203
 204         data = read_sha1_file(tag->object.oid.hash, &type, &size);
 205         if (!data || type != OBJ_TAG)
 206                 goto cleanup;
 207
 208         ret = xcalloc(1, sizeof(struct taginfo));
 209
 210         for (p = data; !end_of_header(p); p = next_header_line(p)) {
 211                 if (skip_prefix(p, "tagger ", &p)) {
 212                         parse_user(p, &ret->tagger, &ret->tagger_email,
 213                                 &ret->tagger_date, &ret->tagger_tz);
 214                 }
 215         }
 216
 217         while (p && *p == '\n')
 218                 p++;
 219
 220         if (p && *p)
 221                 ret->msg = xstrdup(p);
 222
 223 cleanup:
 224         free(data);
 225         return ret;
 226 }