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 the reading of yet another configfile after 16 invocations */
  74         if (nesting++ > 16)
  75                 return -1;
  76         if (!(f = fopen(filename, "r")))
  77                 return -1;
  78         while((len = read_config_line(f, line, &value, sizeof(line))) > 0)
  79                 (*fn)(line, value);
  80         fclose(f);
  81         return 0;
  82 }
  83
  84 char *convert_query_hexchar(char *txt)
  85 {
  86         int d1, d2;
  87         if (strlen(txt) < 3) {
  88                 *txt = '\0';
  89                 return txt-1;
  90         }
  91         d1 = hextoint(*(txt+1));
  92         d2 = hextoint(*(txt+2));
  93         if (d1<0 || d2<0) {
  94                 strcpy(txt, txt+3);
  95                 return txt-1;
  96         } else {
  97                 *txt = d1 * 16 + d2;
  98                 strcpy(txt+1, txt+3);
  99                 return txt;
 100         }
 101 }
 102
 103 int cgit_parse_query(char *txt, configfn fn)
 104 {
 105         char *t, *value = NULL, c;
 106
 107         if (!txt)
 108                 return 0;
 109
 110         t = txt = xstrdup(txt);
 111
 112         while((c=*t) != '\0') {
 113                 if (c=='=') {
 114                         *t = '\0';
 115                         value = t+1;
 116                 } else if (c=='+') {
 117                         *t = ' ';
 118                 } else if (c=='%') {
 119                         t = convert_query_hexchar(t);
 120                 } else if (c=='&') {
 121                         *t = '\0';
 122                         (*fn)(txt, value);
 123                         txt = t+1;
 124                         value = NULL;
 125                 }
 126                 t++;
 127         }
 128         if (t!=txt)
 129                 (*fn)(txt, value);
 130         return 0;
 131 }
 132
 133 char *substr(const char *head, const char *tail)
 134 {
 135         char *buf;
 136
 137         buf = xmalloc(tail - head + 1);
 138         strncpy(buf, head, tail - head);
 139         buf[tail - head] = '\0';
 140         return buf;
 141 }
 142
 143 struct commitinfo *cgit_parse_commit(struct commit *commit)
 144 {
 145         struct commitinfo *ret;
 146         char *p = commit->buffer, *t = commit->buffer;
 147
 148         ret = xmalloc(sizeof(*ret));
 149         ret->commit = commit;
 150         ret->author = NULL;
 151         ret->author_email = NULL;
 152         ret->committer = NULL;
 153         ret->committer_email = NULL;
 154         ret->subject = NULL;
 155         ret->msg = NULL;
 156
 157         if (strncmp(p, "tree ", 5))
 158                 die("Bad commit: %s", sha1_to_hex(commit->object.sha1));
 159         else
 160                 p += 46; // "tree " + hex[40] + "\n"
 161
 162         while (!strncmp(p, "parent ", 7))
 163                 p += 48; // "parent " + hex[40] + "\n"
 164
 165         if (!strncmp(p, "author ", 7)) {
 166                 p += 7;
 167                 t = strchr(p, '<') - 1;
 168                 ret->author = substr(p, t);
 169                 p = t;
 170                 t = strchr(t, '>') + 1;
 171                 ret->author_email = substr(p, t);
 172                 ret->author_date = atol(++t);
 173                 p = strchr(t, '\n') + 1;
 174         }
 175
 176         if (!strncmp(p, "committer ", 9)) {
 177                 p += 9;
 178                 t = strchr(p, '<') - 1;
 179                 ret->committer = substr(p, t);
 180                 p = t;
 181                 t = strchr(t, '>') + 1;
 182                 ret->committer_email = substr(p, t);
 183                 ret->committer_date = atol(++t);
 184                 p = strchr(t, '\n') + 1;
 185         }
 186
 187         while (*p == '\n')
 188                 p = strchr(p, '\n') + 1;
 189
 190         t = strchr(p, '\n');
 191         if (t && *t) {
 192                 ret->subject = substr(p, t);
 193                 p = t + 1;
 194
 195                 while (*p == '\n')
 196                         p = strchr(p, '\n') + 1;
 197                 ret->msg = p;
 198         }
 199         return ret;
 200 }
 201
 202
 203 struct taginfo *cgit_parse_tag(struct tag *tag)
 204 {
 205         void *data;
 206         enum object_type type;
 207         unsigned long size;
 208         char *p, *t;
 209         struct taginfo *ret;
 210
 211         data = read_sha1_file(tag->object.sha1, &type, &size);
 212         if (!data || type != OBJ_TAG) {
 213                 free(data);
 214                 return 0;
 215         }
 216
 217         ret = xmalloc(sizeof(*ret));
 218         ret->tagger = NULL;
 219         ret->tagger_email = NULL;
 220         ret->tagger_date = 0;
 221         ret->msg = NULL;
 222
 223         p = data;
 224
 225         while (p && *p) {
 226                 if (*p == '\n')
 227                         break;
 228
 229                 if (!strncmp(p, "tagger ", 7)) {
 230                         p += 7;
 231                         t = strchr(p, '<') - 1;
 232                         ret->tagger = substr(p, t);
 233                         p = t;
 234                         t = strchr(t, '>') + 1;
 235                         ret->tagger_email = substr(p, t);
 236                         ret->tagger_date = atol(++t);
 237                 }
 238                 p = strchr(p, '\n') + 1;
 239         }
 240
 241         while (p && (*p == '\n'))
 242                 p = strchr(p, '\n') + 1;
 243         if (p && *p)
 244                 ret->msg = xstrdup(p);
 245         free(data);
 246         return ret;
 247 }