research.m1stereo.tv/gitweb/ - melted/blob - src/mvcp/mvcp_parser.c

   1 /*
   2  * mvcp_parser.c -- MVCP Parser for Melted
   3  * Copyright (C) 2002-2009 Ushodaya Enterprises Limited
   4  * Author: Charles Yates <charles.yates@pandora.be>
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  */
  20
  21 /* System header files */
  22 #include <stdio.h>
  23 #include <stdarg.h>
  24 #include <stdlib.h>
  25 #include <string.h>
  26
  27 /* Application header files */
  28 #include "mvcp_parser.h"
  29 #include "mvcp_util.h"
  30
  31 /** Connect to the parser.
  32 */
  33
  34 mvcp_response mvcp_parser_connect( mvcp_parser parser )
  35 {
  36         return parser->connect( parser->real );
  37 }
  38
  39 /** Execute a command via the parser.
  40 */
  41
  42 mvcp_response mvcp_parser_execute( mvcp_parser parser, char *command )
  43 {
  44         return parser->execute( parser->real, command );
  45 }
  46
  47 /** Push a service via the parser.
  48 */
  49
  50 mvcp_response mvcp_parser_received( mvcp_parser parser, char *command, char *doc )
  51 {
  52         return parser->received != NULL ? parser->received( parser->real, command, doc ) : NULL;
  53 }
  54
  55 /** Push a service via the parser.
  56 */
  57
  58 mvcp_response mvcp_parser_push( mvcp_parser parser, char *command, mlt_service service )
  59 {
  60         return parser->push( parser->real, command, service );
  61 }
  62
  63 /** Execute a formatted command via the parser.
  64 */
  65
  66 mvcp_response mvcp_parser_executef( mvcp_parser parser, const char *format, ... )
  67 {
  68         char *command = malloc( 10240 );
  69         mvcp_response response = NULL;
  70         if ( command != NULL )
  71         {
  72                 va_list list;
  73                 va_start( list, format );
  74                 if ( vsnprintf( command, 10240, format, list ) != 0 )
  75                         response = mvcp_parser_execute( parser, command );
  76                 va_end( list );
  77                 free( command );
  78         }
  79         return response;
  80 }
  81
  82 /** Execute the contents of a file descriptor.
  83 */
  84
  85 mvcp_response mvcp_parser_run_file( mvcp_parser parser, FILE *file )
  86 {
  87         mvcp_response response = mvcp_response_init( );
  88         if ( response != NULL )
  89         {
  90                 char command[ 1024 ];
  91                 mvcp_response_set_error( response, 201, "OK" );
  92                 while ( mvcp_response_get_error_code( response ) == 201 && fgets( command, 1024, file ) )
  93                 {
  94                         mvcp_util_trim( mvcp_util_chomp( command ) );
  95                         if ( strcmp( command, "" ) && command[ 0 ] != '#' )
  96                         {
  97                                 mvcp_response temp = NULL;
  98                                 mvcp_response_printf( response, 1024, "%s\n", command );
  99                                 temp = mvcp_parser_execute( parser, command );
 100                                 if ( temp != NULL )
 101                                 {
 102                                         int index = 0;
 103                                         for ( index = 0; index < mvcp_response_count( temp ); index ++ )
 104                                                 mvcp_response_printf( response, 10240, "%s\n", mvcp_response_get_line( temp, index ) );
 105                                         mvcp_response_close( temp );
 106                                 }
 107                                 else
 108                                 {
 109                                         mvcp_response_set_error( response, 500, "Batch execution failed" );
 110                                 }
 111                         }
 112                 }
 113         }
 114         return response;
 115 }
 116
 117 /** Execute the contents of a file. Note the special case mvcp_response returned.
 118 */
 119
 120 mvcp_response mvcp_parser_run( mvcp_parser parser, char *filename )
 121 {
 122         mvcp_response response;
 123         FILE *file = fopen( filename, "r" );
 124         if ( file != NULL )
 125         {
 126                 response = mvcp_parser_run_file( parser, file );
 127                 fclose( file );
 128         }
 129         else
 130         {
 131                 response = mvcp_response_init( );
 132                 mvcp_response_set_error( response, 404, "File not found." );
 133         }
 134         return response;
 135 }
 136
 137 /** Get the notifier associated to the parser.
 138 */
 139
 140 mvcp_notifier mvcp_parser_get_notifier( mvcp_parser parser )
 141 {
 142         if ( parser->notifier == NULL )
 143                 parser->notifier = mvcp_notifier_init( );
 144         return parser->notifier;
 145 }
 146
 147 /** Close the parser.
 148 */
 149
 150 void mvcp_parser_close( mvcp_parser parser )
 151 {
 152         if ( parser != NULL )
 153         {
 154                 parser->close( parser->real );
 155                 mvcp_notifier_close( parser->notifier );
 156                 free( parser );
 157         }
 158 }