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 = xstrdup(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
 203         if (strncmp(p, "tree ", 5))
 204                 die("Bad commit: %s", sha1_to_hex(commit->object.sha1));
 205         else
 206                 p += 46; // "tree " + hex[40] + "\n"
 207
 208         while (!strncmp(p, "parent ", 7))
 209                 p += 48; // "parent " + hex[40] + "\n"
 210
 211         if (!strncmp(p, "author ", 7)) {
 212                 p += 7;
 213                 t = strchr(p, '<') - 1;
 214                 ret->author = substr(p, t);
 215                 p = t;
 216                 t = strchr(t, '>') + 1;
 217                 ret->author_email = substr(p, t);
 218                 ret->author_date = atol(++t);
 219                 p = strchr(t, '\n') + 1;
 220         }
 221
 222         if (!strncmp(p, "committer ", 9)) {
 223                 p += 9;
 224                 t = strchr(p, '<') - 1;
 225                 ret->committer = substr(p, t);
 226                 p = t;
 227                 t = strchr(t, '>') + 1;
 228                 ret->committer_email = substr(p, t);
 229                 ret->committer_date = atol(++t);
 230                 p = strchr(t, '\n') + 1;
 231         }
 232
 233         while (*p == '\n')
 234                 p = strchr(p, '\n') + 1;
 235
 236         t = strchr(p, '\n');
 237         if (t && *t) {
 238                 ret->subject = substr(p, t);
 239                 p = t + 1;
 240
 241                 while (*p == '\n')
 242                         p = strchr(p, '\n') + 1;
 243                 ret->msg = p;
 244         }
 245         return ret;
 246 }
 247
 248
 249 struct taginfo *cgit_parse_tag(struct tag *tag)
 250 {
 251         void *data;
 252         enum object_type type;
 253         unsigned long size;
 254         char *p, *t;
 255         struct taginfo *ret;
 256
 257         data = read_sha1_file(tag->object.sha1, &type, &size);
 258         if (!data || type != OBJ_TAG) {
 259                 free(data);
 260                 return 0;
 261         }
 262
 263         ret = xmalloc(sizeof(*ret));
 264         ret->tagger = NULL;
 265         ret->tagger_email = NULL;
 266         ret->tagger_date = 0;
 267         ret->msg = NULL;
 268
 269         p = data;
 270
 271         while (p && *p) {
 272                 if (*p == '\n')
 273                         break;
 274
 275                 if (!strncmp(p, "tagger ", 7)) {
 276                         p += 7;
 277                         t = strchr(p, '<') - 1;
 278                         ret->tagger = substr(p, t);
 279                         p = t;
 280                         t = strchr(t, '>') + 1;
 281                         ret->tagger_email = substr(p, t);
 282                         ret->tagger_date = atol(++t);
 283                 }
 284                 p = strchr(p, '\n') + 1;
 285         }
 286
 287         while (p && (*p == '\n'))
 288                 p = strchr(p, '\n') + 1;
 289         if (p && *p)
 290                 ret->msg = xstrdup(p);
 291         free(data);
 292         return ret;
 293 }