gitweb.ps.run Git - ps-cgit/blob - parsing.c

   1 /* config.c: parsing of config files
   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 int next_char(FILE *f)
  12 {
  13         int c = fgetc(f);
  14         if (c=='\r') {
  15                 c = fgetc(f);
  16                 if (c!='\n') {
  17                         ungetc(c, f);
  18                         c = '\r';
  19                 }
  20         }
  21         return c;
  22 }
  23
  24 void skip_line(FILE *f)
  25 {
  26         int c;
  27
  28         while((c=next_char(f)) && c!='\n' && c!=EOF)
  29                 ;
  30 }
  31
  32 int read_config_line(FILE *f, char *line, const char **value, int bufsize)
  33 {
  34         int i = 0, isname = 0;
  35
  36         *value = NULL;
  37         while(i<bufsize-1) {
  38                 int c = next_char(f);
  39                 if (!isname && (c=='#' || c==';')) {
  40                         skip_line(f);
  41                         continue;
  42                 }
  43                 if (!isname && isspace(c))
  44                         continue;
  45
  46                 if (c=='=' && !*value) {
  47                         line[i] = 0;
  48                         *value = &line[i+1];
  49                 } else if (c=='\n' && !isname) {
  50                         i = 0;
  51                         continue;
  52                 } else if (c=='\n' || c==EOF) {
  53                         line[i] = 0;
  54                         break;
  55                 } else {
  56                         line[i]=c;
  57                 }
  58                 isname = 1;
  59                 i++;
  60         }
  61         line[i+1] = 0;
  62         return i;
  63 }
  64
  65 int cgit_read_config(const char *filename, configfn fn)
  66 {
  67         static int nesting;
  68         int len;
  69         char line[256];
  70         const char *value;
  71         FILE *f;
  72
  73         /* cancel deeply nested include-commands */
  74         if (nesting > 8)
  75                 return -1;
  76         if (!(f = fopen(filename, "r")))
  77                 return -1;
  78         nesting++;
  79         while((len = read_config_line(f, line, &value, sizeof(line))) > 0)
  80                 (*fn)(line, value);
  81         nesting--;
  82         fclose(f);
  83         return 0;
  84 }
  85
  86 char *convert_query_hexchar(char *txt)
  87 {
  88         int d1, d2;
  89         if (strlen(txt) < 3) {
  90                 *txt = '\0';
  91                 return txt-1;
  92         }
  93         d1 = hextoint(*(txt+1));
  94         d2 = hextoint(*(txt+2));
  95         if (d1<0 || d2<0) {
  96                 strcpy(txt, txt+3);
  97                 return txt-1;
  98         } else {
  99                 *txt = d1 * 16 + d2;
 100                 strcpy(txt+1, txt+3);
 101                 return txt;
 102         }
 103 }
 104
 105 int cgit_parse_query(char *txt, configfn fn)
 106 {
 107         char *t, *value = NULL, c;
 108
 109         if (!txt)
 110                 return 0;
 111
 112         t = txt = xstrdup(txt);
 113
 114         while((c=*t) != '\0') {
 115                 if (c=='=') {
 116                         *t = '\0';
 117                         value = t+1;
 118                 } else if (c=='+') {
 119                         *t = ' ';
 120                 } else if (c=='%') {
 121                         t = convert_query_hexchar(t);
 122                 } else if (c=='&') {
 123                         *t = '\0';
 124                         (*fn)(txt, value);
 125                         txt = t+1;
 126                         value = NULL;
 127                 }
 128                 t++;
 129         }
 130         if (t!=txt)
 131                 (*fn)(txt, value);
 132         return 0;
 133 }
 134
 135 /*
 136  * url syntax: [repo ['/' cmd [ '/' path]]]
 137  *   repo: any valid repo url, may contain '/'
 138  *   cmd:  log | commit | diff | tree | view | blob | snapshot
 139  *   path: any valid path, may contain '/'
 140  *
 141  */
 142 void cgit_parse_url(const char *url)
 143 {
 144         char *cmd, *p;
 145
 146         cgit_repo = NULL;
 147         if (!url || url[0] == '\0')
 148                 return;
 149
 150         cgit_repo = cgit_get_repoinfo(url);
 151         if (cgit_repo) {
 152                 cgit_query_repo = cgit_repo->url;
 153                 return;
 154         }
 155
 156         cmd = strchr(url, '/');
 157         while (!cgit_repo && cmd) {
 158                 cmd[0] = '\0';
 159                 cgit_repo = cgit_get_repoinfo(url);
 160                 if (cgit_repo == NULL) {
 161                         cmd[0] = '/';
 162                         cmd = strchr(cmd + 1, '/');
 163                         continue;
 164                 }
 165
 166                 cgit_query_repo = cgit_repo->url;
 167                 p = strchr(cmd + 1, '/');
 168                 if (p) {
 169                         p[0] = '\0';
 170                         if (p[1])
 171                                 cgit_query_path = trim_end(p + 1, '/');
 172                 }
 173                 cgit_cmd = cgit_get_cmd_index(cmd + 1);
 174                 cgit_query_page = xstrdup(cmd + 1);
 175                 return;
 176         }
 177 }
 178
 179 char *substr(const char *head, const char *tail)
 180 {
 181         char *buf;
 182
 183         buf = xmalloc(tail - head + 1);
 184         strncpy(buf, head, tail - head);
 185         buf[tail - head] = '\0';
 186         return buf;
 187 }
 188
 189 struct commitinfo *cgit_parse_commit(struct commit *commit)
 190 {
 191         struct commitinfo *ret;
 192         char *p = commit->buffer, *t = commit->buffer;
 193
 194         ret = xmalloc(sizeof(*ret));
 195         ret->commit = commit;
 196         ret->author = NULL;
 197         ret->author_email = NULL;
 198         ret->committer = NULL;
 199         ret->committer_email = NULL;
 200         ret->subject = NULL;
 201         ret->msg = NULL;
 202         ret->msg_encoding = NULL;
 203
 204         if (p == NULL)
 205                 return ret;
 206
 207         if (strncmp(p, "tree ", 5))
 208                 die("Bad commit: %s", sha1_to_hex(commit->object.sha1));
 209         else
 210                 p += 46; // "tree " + hex[40] + "\n"
 211
 212         while (!strncmp(p, "parent ", 7))
 213                 p += 48; // "parent " + hex[40] + "\n"
 214
 215         if (!strncmp(p, "author ", 7)) {
 216                 p += 7;
 217                 t = strchr(p, '<') - 1;
 218                 ret->author = substr(p, t);
 219                 p = t;
 220                 t = strchr(t, '>') + 1;
 221                 ret->author_email = substr(p, t);
 222                 ret->author_date = atol(++t);
 223                 p = strchr(t, '\n') + 1;
 224         }
 225
 226         if (!strncmp(p, "committer ", 9)) {
 227                 p += 9;
 228                 t = strchr(p, '<') - 1;
 229                 ret->committer = substr(p, t);
 230                 p = t;
 231                 t = strchr(t, '>') + 1;
 232                 ret->committer_email = substr(p, t);
 233                 ret->committer_date = atol(++t);
 234                 p = strchr(t, '\n') + 1;
 235         }
 236
 237         if (!strncmp(p, "encoding ", 9)) {
 238                 p += 9;
 239                 t = strchr(p, '\n') + 1;
 240                 ret->msg_encoding = substr(p, t);
 241                 p = t;
 242         } else
 243                 ret->msg_encoding = xstrdup(PAGE_ENCODING);
 244
 245         while (*p && (*p != '\n'))
 246                 p = strchr(p, '\n') + 1; // skip unknown header fields
 247
 248         while (*p == '\n')
 249                 p = strchr(p, '\n') + 1;
 250
 251         t = strchr(p, '\n');
 252         if (t) {
 253                 if (*t == '\0')
 254                         ret->subject = "** empty **";
 255                 else
 256                         ret->subject = substr(p, t);
 257                 p = t + 1;
 258
 259                 while (*p == '\n')
 260                         p = strchr(p, '\n') + 1;
 261                 ret->msg = xstrdup(p);
 262         } else
 263                 ret->subject = substr(p, p+strlen(p));
 264
 265         if(strcmp(ret->msg_encoding, PAGE_ENCODING)) {
 266                 t = reencode_string(ret->subject, PAGE_ENCODING,
 267                                     ret->msg_encoding);
 268                 if(t) {
 269                         free(ret->subject);
 270                         ret->subject = t;
 271                 }
 272
 273                 t = reencode_string(ret->msg, PAGE_ENCODING,
 274                                     ret->msg_encoding);
 275                 if(t) {
 276                         free(ret->msg);
 277                         ret->msg = t;
 278                 }
 279         }
 280
 281         return ret;
 282 }
 283
 284
 285 struct taginfo *cgit_parse_tag(struct tag *tag)
 286 {
 287         void *data;
 288         enum object_type type;
 289         unsigned long size;
 290         char *p, *t;
 291         struct taginfo *ret;
 292
 293         data = read_sha1_file(tag->object.sha1, &type, &size);
 294         if (!data || type != OBJ_TAG) {
 295                 free(data);
 296                 return 0;
 297         }
 298
 299         ret = xmalloc(sizeof(*ret));
 300         ret->tagger = NULL;
 301         ret->tagger_email = NULL;
 302         ret->tagger_date = 0;
 303         ret->msg = NULL;
 304
 305         p = data;
 306
 307         while (p && *p) {
 308                 if (*p == '\n')
 309                         break;
 310
 311                 if (!strncmp(p, "tagger ", 7)) {
 312                         p += 7;
 313                         t = strchr(p, '<') - 1;
 314                         ret->tagger = substr(p, t);
 315                         p = t;
 316                         t = strchr(t, '>') + 1;
 317                         ret->tagger_email = substr(p, t);
 318                         ret->tagger_date = atol(++t);
 319                 }
 320                 p = strchr(p, '\n') + 1;
 321         }
 322
 323         while (p && *p && (*p != '\n'))
 324                 p = strchr(p, '\n') + 1; // skip unknown tag fields
 325
 326         while (p && (*p == '\n'))
 327                 p = strchr(p, '\n') + 1;
 328         if (p && *p)
 329                 ret->msg = xstrdup(p);
 330         free(data);
 331         return ret;
 332 }