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         int ret = 0, len;
  68         char line[256];
  69         const char *value;
  70         FILE *f = fopen(filename, "r");
  71
  72         if (!f)
  73                 return -1;
  74
  75         while((len = read_config_line(f, line, &value, sizeof(line))) > 0)
  76                 (*fn)(line, value);
  77
  78         fclose(f);
  79         return ret;
  80 }
  81
  82 char *convert_query_hexchar(char *txt)
  83 {
  84         int d1, d2;
  85         if (strlen(txt) < 3) {
  86                 *txt = '\0';
  87                 return txt-1;
  88         }
  89         d1 = hextoint(*(txt+1));
  90         d2 = hextoint(*(txt+2));
  91         if (d1<0 || d2<0) {
  92                 strcpy(txt, txt+3);
  93                 return txt-1;
  94         } else {
  95                 *txt = d1 * 16 + d2;
  96                 strcpy(txt+1, txt+3);
  97                 return txt;
  98         }
  99 }
 100
 101 int cgit_parse_query(char *txt, configfn fn)
 102 {
 103         char *t, *value = NULL, c;
 104
 105         if (!txt)
 106                 return 0;
 107
 108         t = txt = xstrdup(txt);
 109
 110         while((c=*t) != '\0') {
 111                 if (c=='=') {
 112                         *t = '\0';
 113                         value = t+1;
 114                 } else if (c=='+') {
 115                         *t = ' ';
 116                 } else if (c=='%') {
 117                         t = convert_query_hexchar(t);
 118                 } else if (c=='&') {
 119                         *t = '\0';
 120                         (*fn)(txt, value);
 121                         txt = t+1;
 122                         value = NULL;
 123                 }
 124                 t++;
 125         }
 126         if (t!=txt)
 127                 (*fn)(txt, value);
 128         return 0;
 129 }
 130
 131 char *substr(const char *head, const char *tail)
 132 {
 133         char *buf;
 134
 135         buf = xmalloc(tail - head + 1);
 136         strncpy(buf, head, tail - head);
 137         buf[tail - head] = '\0';
 138         return buf;
 139 }
 140
 141 struct commitinfo *cgit_parse_commit(struct commit *commit)
 142 {
 143         struct commitinfo *ret;
 144         char *p = commit->buffer, *t = commit->buffer;
 145
 146         ret = xmalloc(sizeof(*ret));
 147         ret->commit = commit;
 148         ret->author = NULL;
 149         ret->author_email = NULL;
 150         ret->committer = NULL;
 151         ret->committer_email = NULL;
 152         ret->subject = NULL;
 153         ret->msg = NULL;
 154
 155         if (strncmp(p, "tree ", 5))
 156                 die("Bad commit: %s", sha1_to_hex(commit->object.sha1));
 157         else
 158                 p += 46; // "tree " + hex[40] + "\n"
 159
 160         while (!strncmp(p, "parent ", 7))
 161                 p += 48; // "parent " + hex[40] + "\n"
 162
 163         if (!strncmp(p, "author ", 7)) {
 164                 p += 7;
 165                 t = strchr(p, '<') - 1;
 166                 ret->author = substr(p, t);
 167                 p = t;
 168                 t = strchr(t, '>') + 1;
 169                 ret->author_email = substr(p, t);
 170                 ret->author_date = atol(++t);
 171                 p = strchr(t, '\n') + 1;
 172         }
 173
 174         if (!strncmp(p, "committer ", 9)) {
 175                 p += 9;
 176                 t = strchr(p, '<') - 1;
 177                 ret->committer = substr(p, t);
 178                 p = t;
 179                 t = strchr(t, '>') + 1;
 180                 ret->committer_email = substr(p, t);
 181                 ret->committer_date = atol(++t);
 182                 p = strchr(t, '\n') + 1;
 183         }
 184
 185         while (*p == '\n')
 186                 p = strchr(p, '\n') + 1;
 187
 188         t = strchr(p, '\n');
 189         if (t && *t) {
 190                 ret->subject = substr(p, t);
 191                 p = t + 1;
 192
 193                 while (*p == '\n')
 194                         p = strchr(p, '\n') + 1;
 195                 ret->msg = p;
 196         }
 197         return ret;
 198 }
 199
 200
 201 struct taginfo *cgit_parse_tag(struct tag *tag)
 202 {
 203         void *data;
 204         char type[20];
 205         unsigned long size;
 206         char *p, *t;
 207         struct taginfo *ret;
 208
 209         data = read_sha1_file(tag->object.sha1, type, &size);
 210         if (!data || strcmp(type, tag_type)) {
 211                 free(data);
 212                 return 0;
 213         }
 214
 215         ret = xmalloc(sizeof(*ret));
 216         ret->tagger = NULL;
 217         ret->tagger_email = NULL;
 218         ret->tagger_date = 0;
 219         ret->msg = NULL;
 220
 221         p = data;
 222
 223         while (p && *p) {
 224                 if (*p == '\n')
 225                         break;
 226
 227                 if (!strncmp(p, "tagger ", 7)) {
 228                         p += 7;
 229                         t = strchr(p, '<') - 1;
 230                         ret->tagger = substr(p, t);
 231                         p = t;
 232                         t = strchr(t, '>') + 1;
 233                         ret->tagger_email = substr(p, t);
 234                         ret->tagger_date = atol(++t);
 235                 }
 236                 p = strchr(p, '\n') + 1;
 237         }
 238
 239         while (p && (*p == '\n'))
 240                 p = strchr(p, '\n') + 1;
 241         if (p && *p)
 242                 ret->msg = xstrdup(p);
 243         free(data);
 244         return ret;
 245 }