parser-cfg.c

   1
   2 /// \defgroup ConfigParsers Config parsers
   3 ///
   4 /// The \ref ConfigParsers make use of the \ref Config to setup the config variables,
   5 /// the command line parsers also build the playlist.
   6 ///@{
   7
   8 /// \file
   9
  10 #include "config.h"
  11
  12 #include <stdio.h>
  13 #include <stdlib.h>
  14 #include <string.h>
  15 #include <errno.h>
  16 #include <ctype.h>
  17
  18 #ifdef MP_DEBUG
  19 #include <assert.h>
  20 #endif
  21
  22 #include "parser-cfg.h"
  23 #include "mp_msg.h"
  24 #include "m_option.h"
  25 #include "m_config.h"
  26
  27 /// Maximal include depth.
  28 #define MAX_RECURSION_DEPTH     8
  29
  30 /// Current include depth.
  31 static int recursion_depth = 0;
  32
  33 /// Setup the \ref Config from a config file.
  34 /** \param config The config object.
  35  *  \param conffile Path to the config file.
  36  *  \return 1 on sucess, -1 on error.
  37  */
  38 int m_config_parse_config_file(m_config_t* config, char *conffile)
  39 {
  40 #define PRINT_LINENUM   mp_msg(MSGT_CFGPARSER,MSGL_V,"%s(%d): ", conffile, line_num)
  41 #define MAX_LINE_LEN    10000
  42 #define MAX_OPT_LEN     1000
  43 #define MAX_PARAM_LEN   1500
  44         FILE *fp;
  45         char *line;
  46         char opt[MAX_OPT_LEN + 1];
  47         char param[MAX_PARAM_LEN + 1];
  48         char c;         /* for the "" and '' check */
  49         int tmp;
  50         int line_num = 0;
  51         int line_pos;   /* line pos */
  52         int opt_pos;    /* opt pos */
  53         int param_pos;  /* param pos */
  54         int ret = 1;
  55         int errors = 0;
  56         int prev_mode = config->mode;
  57         m_profile_t* profile = NULL;
  58
  59 #ifdef MP_DEBUG
  60         assert(config != NULL);
  61         //      assert(conf_list != NULL);
  62 #endif
  63         mp_msg(MSGT_CFGPARSER,MSGL_V,"Reading config file %s", conffile);
  64
  65         if (recursion_depth > MAX_RECURSION_DEPTH) {
  66                 mp_msg(MSGT_CFGPARSER,MSGL_ERR,": too deep 'include'. check your configfiles\n");
  67                 ret = -1;
  68                 goto out;
  69         } else
  70
  71         config->mode = M_CONFIG_FILE;
  72
  73         if ((line = malloc(MAX_LINE_LEN + 1)) == NULL) {
  74                 mp_msg(MSGT_CFGPARSER,MSGL_FATAL,"\ncan't get memory for 'line': %s", strerror(errno));
  75                 ret = -1;
  76                 goto out;
  77         } else
  78
  79         mp_msg(MSGT_CFGPARSER,MSGL_V,"\n");
  80
  81         if ((fp = fopen(conffile, "r")) == NULL) {
  82           mp_msg(MSGT_CFGPARSER,MSGL_V,": %s\n", strerror(errno));
  83                 free(line);
  84                 ret = 0;
  85                 goto out;
  86         }
  87
  88         while (fgets(line, MAX_LINE_LEN, fp)) {
  89                 if (errors >= 16) {
  90                         mp_msg(MSGT_CFGPARSER,MSGL_FATAL,"too many errors\n");
  91                         goto out;
  92                 }
  93
  94                 line_num++;
  95                 line_pos = 0;
  96
  97                 /* skip whitespaces */
  98                 while (isspace(line[line_pos]))
  99                         ++line_pos;
 100
 101                 /* EOL / comment */
 102                 if (line[line_pos] == '\0' || line[line_pos] == '#')
 103                         continue;
 104
 105                 /* read option. */
 106                 for (opt_pos = 0; isprint(line[line_pos]) &&
 107                                 line[line_pos] != ' ' &&
 108                                 line[line_pos] != '#' &&
 109                                 line[line_pos] != '='; /* NOTHING */) {
 110                         opt[opt_pos++] = line[line_pos++];
 111                         if (opt_pos >= MAX_OPT_LEN) {
 112                                 PRINT_LINENUM;
 113                                 mp_msg(MSGT_CFGPARSER,MSGL_ERR,"too long option at line %d\n",line_num);
 114                                 errors++;
 115                                 ret = -1;
 116                                 goto nextline;
 117                         }
 118                 }
 119                 if (opt_pos == 0) {
 120                         PRINT_LINENUM;
 121                         mp_msg(MSGT_CFGPARSER,MSGL_ERR,"parse error at line %d\n",line_num);
 122                         ret = -1;
 123                         errors++;
 124                         continue;
 125                 }
 126                 opt[opt_pos] = '\0';
 127
 128                 /* Profile declaration */
 129                 if(opt_pos > 2 && opt[0] == '[' && opt[opt_pos-1] == ']') {
 130                         opt[opt_pos-1] = '\0';
 131                         if(strcmp(opt+1,"default"))
 132                                 profile = m_config_add_profile(config,opt+1);
 133                         else
 134                                 profile = NULL;
 135                         continue;
 136                 }
 137
 138 #ifdef MP_DEBUG
 139                 PRINT_LINENUM;
 140                 mp_msg(MSGT_CFGPARSER,MSGL_V,"option: %s\n", opt);
 141 #endif
 142
 143                 /* skip whitespaces */
 144                 while (isspace(line[line_pos]))
 145                         ++line_pos;
 146
 147                 /* check '=' */
 148                 if (line[line_pos++] != '=') {
 149                         PRINT_LINENUM;
 150                         mp_msg(MSGT_CFGPARSER,MSGL_ERR,"Option %s needs a parameter at line %d\n",opt,line_num);
 151                         ret = -1;
 152                         errors++;
 153                         continue;
 154                 }
 155
 156                 /* whitespaces... */
 157                 while (isspace(line[line_pos]))
 158                         ++line_pos;
 159
 160                 /* read the parameter */
 161                 if (line[line_pos] == '"' || line[line_pos] == '\'') {
 162                         c = line[line_pos];
 163                         ++line_pos;
 164                         for (param_pos = 0; line[line_pos] != c; /* NOTHING */) {
 165                                 param[param_pos++] = line[line_pos++];
 166                                 if (param_pos >= MAX_PARAM_LEN) {
 167                                         PRINT_LINENUM;
 168                                         mp_msg(MSGT_CFGPARSER,MSGL_ERR,"Option %s has a too long parameter at line %d\n",opt,line_num);
 169                                         ret = -1;
 170                                         errors++;
 171                                         goto nextline;
 172                                 }
 173                         }
 174                         line_pos++;     /* skip the closing " or ' */
 175                 } else {
 176                         for (param_pos = 0; isprint(line[line_pos]) && !isspace(line[line_pos])
 177                                         && line[line_pos] != '#'; /* NOTHING */) {
 178                                 param[param_pos++] = line[line_pos++];
 179                                 if (param_pos >= MAX_PARAM_LEN) {
 180                                         PRINT_LINENUM;
 181                                         mp_msg(MSGT_CFGPARSER,MSGL_ERR,"too long parameter\n");
 182                                         ret = -1;
 183                                         errors++;
 184                                         goto nextline;
 185                                 }
 186                         }
 187                 }
 188                 param[param_pos] = '\0';
 189
 190                 /* did we read a parameter? */
 191                 if (param_pos == 0) {
 192                         PRINT_LINENUM;
 193                         mp_msg(MSGT_CFGPARSER,MSGL_ERR,"Option %s needs a parameter at line %d\n",opt,line_num);
 194                         ret = -1;
 195                         errors++;
 196                         continue;
 197                 }
 198
 199 #ifdef MP_DEBUG
 200                 PRINT_LINENUM;
 201                 mp_msg(MSGT_CFGPARSER,MSGL_V,"parameter: %s\n", param);
 202 #endif
 203
 204                 /* now, check if we have some more chars on the line */
 205                 /* whitespace... */
 206                 while (isspace(line[line_pos]))
 207                         ++line_pos;
 208
 209                 /* EOL / comment */
 210                 if (line[line_pos] != '\0' && line[line_pos] != '#') {
 211                         PRINT_LINENUM;
 212                         mp_msg(MSGT_CFGPARSER,MSGL_WARN,"extra characters on line %d: %s\n",line_num, line+line_pos);
 213                         ret = -1;
 214                 }
 215
 216                 if(profile) {
 217                         if(!strcmp(opt,"profile-desc"))
 218                                 m_profile_set_desc(profile,param), tmp = 1;
 219                         else
 220                                 tmp = m_config_set_profile_option(config,profile,
 221                                                                   opt,param);
 222                 } else
 223                         tmp = m_config_set_option(config, opt, param);
 224                 if (tmp < 0) {
 225                         PRINT_LINENUM;
 226                         if(tmp == M_OPT_UNKNOWN) {
 227                                 mp_msg(MSGT_CFGPARSER,MSGL_WARN,"Warning unknown option %s at line %d\n", opt,line_num);
 228                                 continue;
 229                         }
 230                         mp_msg(MSGT_CFGPARSER,MSGL_ERR,"Error parsing option %s=%s at line %d\n",opt,param,line_num);
 231                         ret = -1;
 232                         errors++;
 233                         continue;
 234                         /* break */
 235                 }
 236 nextline:
 237                 ;
 238         }
 239
 240         free(line);
 241         fclose(fp);
 242 out:
 243         config->mode = prev_mode;
 244         --recursion_depth;
 245         return ret;
 246 }
 247
 248 extern int mp_msg_levels[];
 249
 250 /// Parse the command line option that must be handled at startup.
 251 int m_config_preparse_command_line(m_config_t *config, int argc, char **argv)
 252 {
 253         int msg_lvl, i, r, ret = 0;
 254         char* arg;
 255         m_option_t* opt;
 256
 257         // Hack to shutup the parser error messages.
 258         msg_lvl = mp_msg_levels[MSGT_CFGPARSER];
 259         mp_msg_levels[MSGT_CFGPARSER] = -11;
 260
 261         config->mode = M_COMMAND_LINE_PRE_PARSE;
 262
 263         for(i = 1 ; i < argc ; i++) {
 264                 arg = argv[i];
 265                 // Ignore non option
 266                 if(arg[0] != '-' || arg[1] == 0) continue;
 267                 arg++;
 268                 // No more options after --
 269                 if(arg[0] == '-' && arg[1] == 0) break;
 270
 271                 opt = m_config_get_option(config,arg);
 272                 // Ignore invalid option
 273                 if(!opt) continue;
 274                 // Set, non-pre-parse options will be ignored
 275                 r = m_config_set_option(config,arg,
 276                                         i+1 < argc ? argv[i+1] : NULL);
 277                 if(r < 0) ret = r;
 278                 else i += r;
 279         }
 280
 281         mp_msg_levels[MSGT_CFGPARSER] = msg_lvl;
 282
 283         return ret;
 284 }
 285
 286 ///@}