#include <stdio.h>
#include <stdlib.h>
#include <string.h>
+#include <ctype.h>
/* ---------------- // Private Implementation // ---------------- */
typedef struct
{
+ int hash[ 199 ];
char **name;
mlt_property *value;
int count;
int size;
+ mlt_properties mirror;
}
property_list;
+/** Memory leak checks.
+*/
+
+#ifdef _MLT_PROPERTY_CHECKS_
+static int properties_created = 0;
+static int properties_destroyed = 0;
+#endif
+
/** Basic implementation.
*/
int mlt_properties_init( mlt_properties this, void *child )
{
- // NULL all methods
- memset( this, 0, sizeof( struct mlt_properties_s ) );
+ if ( this != NULL )
+ {
+#ifdef _MLT_PROPERTY_CHECKS_
+ // Increment number of properties created
+ properties_created ++;
+#endif
+
+ // NULL all methods
+ memset( this, 0, sizeof( struct mlt_properties_s ) );
- // Assign the child of the object
- this->child = child;
+ // Assign the child of the object
+ this->child = child;
- // Allocate the private structure
- this->private = calloc( sizeof( property_list ), 1 );
+ // Allocate the local structure
+ this->local = calloc( sizeof( property_list ), 1 );
+ }
- return this->private == NULL;
+ // Check that initialisation was successful
+ return this != NULL && this->local == NULL;
}
/** Constructor for stand alone object.
return this;
}
+/** Load properties from a file.
+*/
+
+mlt_properties mlt_properties_load( char *filename )
+{
+ // Construct a standalone properties object
+ mlt_properties this = mlt_properties_new( );
+
+ if ( this != NULL )
+ {
+ // Open the file
+ FILE *file = fopen( filename, "r" );
+
+ // Load contents of file
+ if ( file != NULL )
+ {
+ // Temp string
+ char temp[ 1024 ];
+
+ // Read each string from the file
+ while( fgets( temp, 1024, file ) )
+ {
+ // Chomp the string
+ temp[ strlen( temp ) - 1 ] = '\0';
+
+ // Parse and set the property
+ if ( strcmp( temp, "" ) && temp[ 0 ] != '#' )
+ mlt_properties_parse( this, temp );
+ }
+
+ // Close the file
+ fclose( file );
+ }
+ }
+
+ // Return the pointer
+ return this;
+}
+
+static inline int generate_hash( char *name )
+{
+ int hash = 0;
+ int i = 1;
+ while ( *name )
+ hash = ( hash + ( i ++ * ( *name ++ & 31 ) ) ) % 199;
+ return hash;
+}
+
/** Special case - when a container (such as fezzik) is protecting another
producer, we need to ensure that properties are passed through to the
real producer.
*/
-static void mlt_properties_do_mirror( mlt_properties this, char *name )
+static inline void mlt_properties_do_mirror( mlt_properties this, char *name )
{
- mlt_properties mirror = mlt_properties_get_data( this, "mlt_mirror", NULL );
- if ( mirror != NULL )
+ property_list *list = this->local;
+ if ( list->mirror != NULL )
{
char *value = mlt_properties_get( this, name );
if ( value != NULL )
- mlt_properties_set( mirror, name, value );
+ mlt_properties_set( list->mirror, name, value );
}
}
void mlt_properties_mirror( mlt_properties this, mlt_properties that )
{
- mlt_properties_set_data( this, "mlt_mirror", that, 0, NULL, NULL );
+ property_list *list = this->local;
+ list->mirror = that;
}
/** Inherit all serialisable properties from that into this.
int mlt_properties_inherit( mlt_properties this, mlt_properties that )
{
int count = mlt_properties_count( that );
- while ( count -- )
+ int i = 0;
+ for ( i = 0; i < count; i ++ )
{
- char *value = mlt_properties_get_value( that, count );
+ char *value = mlt_properties_get_value( that, i );
if ( value != NULL )
{
- char *name = mlt_properties_get_name( that, count );
+ char *name = mlt_properties_get_name( that, i );
mlt_properties_set( this, name, value );
}
}
return 0;
}
+/** Pass all properties from 'that' that match the prefix to 'this' (excluding the prefix).
+*/
+
+int mlt_properties_pass( mlt_properties this, mlt_properties that, char *prefix )
+{
+ int count = mlt_properties_count( that );
+ int length = strlen( prefix );
+ int i = 0;
+ for ( i = 0; i < count; i ++ )
+ {
+ char *name = mlt_properties_get_name( that, i );
+ if ( !strncmp( name, prefix, length ) )
+ {
+ char *value = mlt_properties_get_value( that, i );
+ if ( value != NULL )
+ mlt_properties_set( this, name + length, value );
+ }
+ }
+ return 0;
+}
+
/** Locate a property by name
*/
-static mlt_property mlt_properties_find( mlt_properties this, char *name )
+static inline mlt_property mlt_properties_find( mlt_properties this, char *name )
{
+ property_list *list = this->local;
mlt_property value = NULL;
- property_list *list = this->private;
- int i = 0;
+ int key = generate_hash( name );
+ int i = list->hash[ key ] - 1;
- // Locate the item
- for ( i = 0; value == NULL && i < list->count; i ++ )
- if ( !strcmp( list->name[ i ], name ) )
+ if ( i >= 0 )
+ {
+ // Check if we're hashed
+ if ( list->count > 0 &&
+ name[ 0 ] == list->name[ i ][ 0 ] &&
+ !strcmp( list->name[ i ], name ) )
value = list->value[ i ];
+ // Locate the item
+ for ( i = list->count - 1; value == NULL && i >= 0; i -- )
+ if ( name[ 0 ] == list->name[ i ][ 0 ] && !strcmp( list->name[ i ], name ) )
+ value = list->value[ i ];
+ }
+
return value;
}
static mlt_property mlt_properties_add( mlt_properties this, char *name )
{
- property_list *list = this->private;
+ property_list *list = this->local;
+ int key = generate_hash( name );
// Check that we have space and resize if necessary
if ( list->count == list->size )
{
- list->size += 10;
+ list->size += 50;
list->name = realloc( list->name, list->size * sizeof( char * ) );
list->value = realloc( list->value, list->size * sizeof( mlt_property ) );
}
list->name[ list->count ] = strdup( name );
list->value[ list->count ] = mlt_property_init( );
+ // Assign to hash table
+ if ( list->hash[ key ] == 0 )
+ list->hash[ key ] = list->count + 1;
+
// Return and increment count accordingly
return list->value[ list->count ++ ];
}
mlt_property property = mlt_properties_fetch( this, name );
// Set it if not NULL
- if ( property != NULL )
+ if ( property != NULL && ( value == NULL || value[ 0 ] != '@' ) )
{
error = mlt_property_set_string( property, value );
mlt_properties_do_mirror( this, name );
}
+ else if ( property != NULL && value[ 0 ] == '@' )
+ {
+ int total = 0;
+ int current = 0;
+ char id[ 255 ];
+ char op = '+';
+
+ value ++;
+
+ while ( *value != '\0' )
+ {
+ int length = strcspn( value, "+-*/" );
+
+ // Get the identifier
+ strncpy( id, value, length );
+ id[ length ] = '\0';
+ value += length;
+
+ // Determine the value
+ if ( isdigit( id[ 0 ] ) )
+ current = atof( id );
+ else
+ current = mlt_properties_get_int( this, id );
+
+ // Apply the operation
+ switch( op )
+ {
+ case '+':
+ total += current;
+ break;
+ case '-':
+ total -= current;
+ break;
+ case '*':
+ total *= current;
+ break;
+ case '/':
+ total /= current;
+ break;
+ }
+
+ // Get the next op
+ op = *value != '\0' ? *value ++ : ' ';
+ }
+
+ error = mlt_property_set_int( property, total );
+ mlt_properties_do_mirror( this, name );
+ }
return error;
}
+/** Set or default the property.
+*/
+
+int mlt_properties_set_or_default( mlt_properties this, char *name, char *value, char *def )
+{
+ return mlt_properties_set( this, name, value == NULL ? def : value );
+}
+
/** Get a string value by name.
*/
char *mlt_properties_get_name( mlt_properties this, int index )
{
- property_list *list = this->private;
+ property_list *list = this->local;
if ( index >= 0 && index < list->count )
return list->name[ index ];
return NULL;
char *mlt_properties_get_value( mlt_properties this, int index )
{
- property_list *list = this->private;
+ property_list *list = this->local;
if ( index >= 0 && index < list->count )
return mlt_property_get_string( list->value[ index ] );
return NULL;
}
+/** Get a data value by index.
+*/
+
+void *mlt_properties_get_data_at( mlt_properties this, int index, int *size )
+{
+ property_list *list = this->local;
+ if ( index >= 0 && index < list->count )
+ return mlt_property_get_data( list->value[ index ], size );
+ return NULL;
+}
+
/** Return the number of items in the list.
*/
int mlt_properties_count( mlt_properties this )
{
- property_list *list = this->private;
+ property_list *list = this->local;
return list->count;
}
int mlt_properties_parse( mlt_properties this, char *namevalue )
{
char *name = strdup( namevalue );
- char *value = strdup( namevalue );
+ char *value = NULL;
int error = 0;
+ char *ptr = strchr( name, '=' );
- if ( strchr( name, '=' ) )
+ if ( ptr )
{
- *( strchr( name, '=' ) ) = '\0';
- strcpy( value, strchr( value, '=' ) + 1 );
+ *( ptr ++ ) = '\0';
+
+ if ( *ptr != '\"' )
+ {
+ value = strdup( ptr );
+ }
+ else
+ {
+ ptr ++;
+ value = strdup( ptr );
+ if ( value != NULL && value[ strlen( value ) - 1 ] == '\"' )
+ value[ strlen( value ) - 1 ] = '\0';
+ }
}
else
{
- strcpy( value, "" );
+ value = strdup( "" );
}
error = mlt_properties_set( this, name, value );
return error;
}
-/** Close the list.
+/** Rename a property.
*/
-void mlt_properties_close( mlt_properties this )
+int mlt_properties_rename( mlt_properties this, char *source, char *dest )
{
- property_list *list = this->private;
- int index = 0;
+ mlt_property value = mlt_properties_find( this, dest );
- // Clean up names and values
- for ( index = list->count - 1; index >= 0; index -- )
+ if ( value == NULL )
{
- free( list->name[ index ] );
- mlt_property_close( list->value[ index ] );
+ property_list *list = this->local;
+ int i = 0;
+
+ // Locate the item
+ for ( i = 0; i < list->count; i ++ )
+ {
+ if ( !strcmp( list->name[ i ], source ) )
+ {
+ free( list->name[ i ] );
+ list->name[ i ] = strdup( dest );
+ list->hash[ generate_hash( dest ) ] = i + 1;
+ break;
+ }
+ }
}
- // Clear up the list
- free( list->name );
- free( list->value );
- free( list );
+ return value != NULL;
+}
+
+/** Dump the properties.
+*/
+
+void mlt_properties_dump( mlt_properties this, FILE *output )
+{
+ property_list *list = this->local;
+ int i = 0;
+ for ( i = 0; i < list->count; i ++ )
+ if ( mlt_properties_get( this, list->name[ i ] ) != NULL )
+ fprintf( output, "%s=%s\n", list->name[ i ], mlt_properties_get( this, list->name[ i ] ) );
+}
+
+/** Close the list.
+*/
- // Free this now if this has no child
- if ( this->child == NULL )
- free( this );
+void mlt_properties_close( mlt_properties this )
+{
+ if ( this != NULL )
+ {
+ property_list *list = this->local;
+ int index = 0;
+
+ // Clean up names and values
+ for ( index = list->count - 1; index >= 0; index -- )
+ {
+ free( list->name[ index ] );
+ mlt_property_close( list->value[ index ] );
+ }
+
+ // Clear up the list
+ free( list->name );
+ free( list->value );
+ free( list );
+
+ // Free this now if this has no child
+ if ( this->child == NULL )
+ free( this );
+
+#ifdef _MLT_PROPERTY_CHECKS_
+ // Increment destroyed count
+ properties_destroyed ++;
+
+ // Show current stats - these should match when the app is closed
+ fprintf( stderr, "Created %d, destroyed %d\n", properties_created, properties_destroyed );
+#endif
+ }
}
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