9f35376d3a04071353aac4572d81a312229b7a67
2 * \file mlt_tokeniser.c
3 * \brief string tokeniser
6 * Copyright (C) 2002-2009 Ushodaya Enterprises Limited
7 * \author Charles Yates <charles.yates@pandora.be>
9 * This library is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU Lesser General Public
11 * License as published by the Free Software Foundation; either
12 * version 2.1 of the License, or (at your option) any later version.
14 * This library is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * Lesser General Public License for more details.
19 * You should have received a copy of the GNU Lesser General Public
20 * License along with this library; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24 /* System header files */
28 /* Application header files */
29 #include "mlt_tokeniser.h"
31 /** Initialise a tokeniser.
34 mlt_tokeniser
mlt_tokeniser_init( )
36 return calloc( 1, sizeof( mlt_tokeniser_t
) );
39 /** Clear the tokeniser.
42 static void mlt_tokeniser_clear( mlt_tokeniser tokeniser
)
45 for ( index
= 0; index
< tokeniser
->count
; index
++ )
46 free( tokeniser
->tokens
[ index
] );
48 free( tokeniser
->input
);
49 tokeniser
->input
= NULL
;
52 /** Append a string to the tokeniser.
55 static int mlt_tokeniser_append( mlt_tokeniser tokeniser
, char *token
)
59 if ( tokeniser
->count
== tokeniser
->size
)
61 tokeniser
->size
+= 20;
62 tokeniser
->tokens
= realloc( tokeniser
->tokens
, tokeniser
->size
* sizeof( char * ) );
65 if ( tokeniser
->tokens
!= NULL
)
67 tokeniser
->tokens
[ tokeniser
->count
++ ] = strdup( token
);
77 /** Parse a string by splitting on the delimiter provided.
80 int mlt_tokeniser_parse_new( mlt_tokeniser tokeniser
, char *string
, char *delimiter
)
83 int length
= strlen( string
);
84 int delimiter_size
= strlen( delimiter
);
86 char *token
= strdup( string
);
88 mlt_tokeniser_clear( tokeniser
);
89 tokeniser
->input
= strdup( string
);
92 for ( index
= 0; index
< length
; )
94 char *start
= string
+ index
;
95 char *end
= strstr( start
, delimiter
);
99 strcat( token
, start
);
100 mlt_tokeniser_append( tokeniser
, token
);
104 else if ( start
!= end
)
106 strncat( token
, start
, end
- start
);
107 index
+= end
- start
;
108 if ( strchr( token
, '\"' ) == NULL
|| token
[ strlen( token
) - 1 ] == '\"' )
110 mlt_tokeniser_append( tokeniser
, token
);
114 else while ( strncmp( string
+ index
, delimiter
, delimiter_size
) == 0 )
116 strncat( token
, delimiter
, delimiter_size
);
117 index
+= delimiter_size
;
122 index
+= strlen( delimiter
);
126 /* Special case - malformed string condition */
127 if ( !strcmp( token
, "" ) )
129 count
= 0 - ( count
- 1 );
130 mlt_tokeniser_append( tokeniser
, token
);
137 /** Get the original input.
140 char *mlt_tokeniser_get_input( mlt_tokeniser tokeniser
)
142 return tokeniser
->input
;
145 /** Get the number of tokens.
148 int mlt_tokeniser_count( mlt_tokeniser tokeniser
)
150 return tokeniser
->count
;
153 /** Get a token as a string.
156 char *mlt_tokeniser_get_string( mlt_tokeniser tokeniser
, int index
)
158 if ( index
< tokeniser
->count
)
159 return tokeniser
->tokens
[ index
];
164 /** Close the tokeniser.
167 void mlt_tokeniser_close( mlt_tokeniser tokeniser
)
169 mlt_tokeniser_clear( tokeniser
);
170 free( tokeniser
->tokens
);