parser-cfg.c

   1 /*
   2  * This file is part of MPlayer.
   3  *
   4  * MPlayer is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * MPlayer is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License along
  15  * with MPlayer; if not, write to the Free Software Foundation, Inc.,
  16  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  17  */
  18
  19 #include "config.h"
  20
  21 #include <stdio.h>
  22 #include <stdlib.h>
  23 #include <string.h>
  24 #include <errno.h>
  25 #include <ctype.h>
  26 #include <assert.h>
  27
  28 #include "parser-cfg.h"
  29 #include "mp_msg.h"
  30 #include "m_option.h"
  31 #include "m_config.h"
  32
  33 /// Maximal include depth.
  34 #define MAX_RECURSION_DEPTH 8
  35
  36 /// Current include depth.
  37 static int recursion_depth = 0;
  38
  39 /// Setup the \ref Config from a config file.
  40 /** \param config The config object.
  41  *  \param conffile Path to the config file.
  42  *  \return 1 on sucess, -1 on error.
  43  */
  44 int m_config_parse_config_file(m_config_t *config, const char *conffile)
  45 {
  46 #define PRINT_LINENUM   mp_msg(MSGT_CFGPARSER, MSGL_V, "%s(%d): ", conffile, line_num)
  47 #define MAX_LINE_LEN    10000
  48 #define MAX_OPT_LEN     1000
  49 #define MAX_PARAM_LEN   1500
  50     FILE *fp;
  51     char *line;
  52     char opt[MAX_OPT_LEN + 1];
  53     char param[MAX_PARAM_LEN + 1];
  54     char c;             /* for the "" and '' check */
  55     int tmp;
  56     int line_num = 0;
  57     int line_pos;       /* line pos */
  58     int opt_pos;        /* opt pos */
  59     int param_pos;      /* param pos */
  60     int ret = 1;
  61     int errors = 0;
  62     int prev_mode = config->mode;
  63     m_profile_t *profile = NULL;
  64
  65     mp_msg(MSGT_CFGPARSER, MSGL_V, "Reading config file %s", conffile);
  66
  67     if (recursion_depth > MAX_RECURSION_DEPTH) {
  68         mp_msg(MSGT_CFGPARSER, MSGL_ERR,
  69                ": too deep 'include'. check your configfiles\n");
  70         ret = -1;
  71         goto out;
  72     } else
  73
  74         config->mode = M_CONFIG_FILE;
  75
  76     if ((line = malloc(MAX_LINE_LEN + 1)) == NULL) {
  77         mp_msg(MSGT_CFGPARSER, MSGL_FATAL,
  78                "\ncan't get memory for 'line': %s", strerror(errno));
  79         ret = -1;
  80         goto out;
  81     } else
  82
  83         mp_msg(MSGT_CFGPARSER, MSGL_V, "\n");
  84
  85     if ((fp = fopen(conffile, "r")) == NULL) {
  86         mp_msg(MSGT_CFGPARSER, MSGL_V, ": %s\n", strerror(errno));
  87         free(line);
  88         ret = 0;
  89         goto out;
  90     }
  91
  92     while (fgets(line, MAX_LINE_LEN, fp)) {
  93         if (errors >= 16) {
  94             mp_msg(MSGT_CFGPARSER, MSGL_FATAL, "too many errors\n");
  95             goto out;
  96         }
  97
  98         line_num++;
  99         line_pos = 0;
 100
 101         /* skip whitespaces */
 102         while (isspace(line[line_pos]))
 103             ++line_pos;
 104
 105         /* EOL / comment */
 106         if (line[line_pos] == '\0' || line[line_pos] == '#')
 107             continue;
 108
 109         /* read option. */
 110         for (opt_pos = 0; isprint(line[line_pos]) &&
 111              line[line_pos] != ' ' &&
 112              line[line_pos] != '#' &&
 113              line[line_pos] != '='; /* NOTHING */) {
 114             opt[opt_pos++] = line[line_pos++];
 115             if (opt_pos >= MAX_OPT_LEN) {
 116                 PRINT_LINENUM;
 117                 mp_msg(MSGT_CFGPARSER, MSGL_ERR,
 118                        "too long option at line %d\n", line_num);
 119                 errors++;
 120                 ret = -1;
 121                 goto nextline;
 122             }
 123         }
 124         if (opt_pos == 0) {
 125             PRINT_LINENUM;
 126             mp_msg(MSGT_CFGPARSER, MSGL_ERR, "parse error at line %d\n",
 127                    line_num);
 128             ret = -1;
 129             errors++;
 130             continue;
 131         }
 132         opt[opt_pos] = '\0';
 133
 134         /* Profile declaration */
 135         if (opt_pos > 2 && opt[0] == '[' && opt[opt_pos - 1] == ']') {
 136             opt[opt_pos - 1] = '\0';
 137             if (strcmp(opt + 1, "default"))
 138                 profile = m_config_add_profile(config, opt + 1);
 139             else
 140                 profile = NULL;
 141             continue;
 142         }
 143
 144         /* skip whitespaces */
 145         while (isspace(line[line_pos]))
 146             ++line_pos;
 147
 148         /* check '=' */
 149         if (line[line_pos++] != '=') {
 150             PRINT_LINENUM;
 151             mp_msg(MSGT_CFGPARSER, MSGL_ERR,
 152                    "Option %s needs a parameter at line %d\n", opt, line_num);
 153             ret = -1;
 154             errors++;
 155             continue;
 156         }
 157
 158         /* whitespaces... */
 159         while (isspace(line[line_pos]))
 160             ++line_pos;
 161
 162         /* read the parameter */
 163         if (line[line_pos] == '"' || line[line_pos] == '\'') {
 164             c = line[line_pos];
 165             ++line_pos;
 166             for (param_pos = 0; line[line_pos] != c; /* NOTHING */) {
 167                 param[param_pos++] = line[line_pos++];
 168                 if (param_pos >= MAX_PARAM_LEN) {
 169                     PRINT_LINENUM;
 170                     mp_msg(MSGT_CFGPARSER, MSGL_ERR,
 171                            "Option %s has a too long parameter at line %d\n",
 172                            opt, line_num);
 173                     ret = -1;
 174                     errors++;
 175                     goto nextline;
 176                 }
 177             }
 178             line_pos++;                 /* skip the closing " or ' */
 179         } else {
 180             for (param_pos = 0; isprint(line[line_pos])
 181                      && !isspace(line[line_pos])
 182                      && line[line_pos] != '#'; /* NOTHING */) {
 183                 param[param_pos++] = line[line_pos++];
 184                 if (param_pos >= MAX_PARAM_LEN) {
 185                     PRINT_LINENUM;
 186                     mp_msg(MSGT_CFGPARSER, MSGL_ERR, "too long parameter\n");
 187                     ret = -1;
 188                     errors++;
 189                     goto nextline;
 190                 }
 191             }
 192         }
 193         param[param_pos] = '\0';
 194
 195         /* did we read a parameter? */
 196         if (param_pos == 0) {
 197             PRINT_LINENUM;
 198             mp_msg(MSGT_CFGPARSER, MSGL_ERR,
 199                    "Option %s needs a parameter at line %d\n", opt, line_num);
 200             ret = -1;
 201             errors++;
 202             continue;
 203         }
 204
 205         /* now, check if we have some more chars on the line */
 206         /* whitespace... */
 207         while (isspace(line[line_pos]))
 208             ++line_pos;
 209
 210         /* EOL / comment */
 211         if (line[line_pos] != '\0' && line[line_pos] != '#') {
 212             PRINT_LINENUM;
 213             mp_msg(MSGT_CFGPARSER, MSGL_WARN,
 214                    "extra characters on line %d: %s\n",
 215                    line_num, line + line_pos);
 216             ret = -1;
 217         }
 218
 219         if (profile) {
 220             if (!strcmp(opt, "profile-desc"))
 221                 m_profile_set_desc(profile, param), tmp = 1;
 222             else
 223                 tmp = m_config_set_profile_option(config, profile,
 224                                                   opt, param);
 225         } else
 226             tmp = m_config_set_option0(config, opt, param, false);
 227         if (tmp < 0) {
 228             PRINT_LINENUM;
 229             if (tmp == M_OPT_UNKNOWN) {
 230                 mp_msg(MSGT_CFGPARSER, MSGL_WARN,
 231                        "Warning unknown option %s at line %d\n",
 232                        opt, line_num);
 233                 continue;
 234             }
 235             mp_msg(MSGT_CFGPARSER, MSGL_ERR,
 236                    "Error parsing option %s=%s at line %d\n",
 237                    opt, param, line_num);
 238             ret = -1;
 239             errors++;
 240             continue;
 241             /* break */
 242         }
 243 nextline:
 244         ;
 245     }
 246
 247     free(line);
 248     fclose(fp);
 249 out:
 250     config->mode = prev_mode;
 251     --recursion_depth;
 252     return ret;
 253 }