/* Fetch a token. If it's a string token terminated by a '[', fetch up to the
* matching ']' as well, for example ".jpg[Q=90]".
*
* Return NULL for end of tokens.
*/
const char *
vips__token_segment( const char *p, VipsToken *token,
char *string, int size )
{
const char *q;
if( !(q = vips__token_must( p, token, string, size )) )
return( NULL );
/* If we stopped on [, read up to the matching ].
*/
if( *token == VIPS_TOKEN_STRING &&
q[0] == '[' ) {
VipsToken sub_token;
char sub_string[VIPS_PATH_MAX];
int depth;
int i;
depth = 0;
do {
if( !(q = vips__token_must( q, &sub_token,
sub_string, VIPS_PATH_MAX )) )
return( NULL );
switch( sub_token ) {
case VIPS_TOKEN_LEFT:
depth += 1;
break;
case VIPS_TOKEN_RIGHT:
depth -= 1;
break;
default:
break;
}
} while( !(sub_token == VIPS_TOKEN_RIGHT && depth == 0) );
i = VIPS_MIN( q - p, size );
vips_strncpy( string, p, i + 1 );
}
return( q );
}
/* We expect a certain token.
*/
const char *
vips__token_need( const char *p, VipsToken need_token,
char *string, int size )
{
VipsToken token;
if( !(p = vips__token_must( p, &token, string, size )) )
return( NULL );
if( token != need_token ) {
vips_error( "get_token", _( "expected %s, saw %s" ),
vips_enum_nick( VIPS_TYPE_TOKEN, need_token ),
vips_enum_nick( VIPS_TYPE_TOKEN, token ) );
return( NULL );
}
return( p );
}
