* mlt_properties.c -- base properties class
* Copyright (C) 2003-2004 Ushodaya Enterprises Limited
* Author: Charles Yates <charles.yates@pandora.be>
+ * Contributor: Dan Dennedy <dan@dennedy.org>
*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
*
- * This program is distributed in the hope that it will be useful,
+ * This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
*
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software Foundation,
- * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
-#include "config.h"
#include "mlt_properties.h"
#include "mlt_property.h"
+#include "mlt_deque.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
+#include <ctype.h>
+#include <stdarg.h>
+#include <pthread.h>
+#include <sys/types.h>
+#include <dirent.h>
/* ---------------- // Private Implementation // ---------------- */
int count;
int size;
mlt_properties mirror;
+ int ref_count;
+ pthread_mutex_t mutex;
}
property_list;
/** Memory leak checks.
*/
+//#define _MLT_PROPERTY_CHECKS_ 2
+
#ifdef _MLT_PROPERTY_CHECKS_
static int properties_created = 0;
static int properties_destroyed = 0;
// 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 );
+
+ // Increment the ref count
+ ( ( property_list * )this->local )->ref_count = 1;
+ pthread_mutex_init( &( ( property_list * )this->local )->mutex, NULL );;
}
// Check that initialisation was successful
- return this != NULL && this->private == NULL;
+ return this != NULL && this->local == NULL;
}
/** Constructor for stand alone object.
return this;
}
-/** Load properties from a file.
+/** Load properties from a .properties file (DEPRECATED).
*/
-mlt_properties mlt_properties_load( char *filename )
+mlt_properties mlt_properties_load( const char *filename )
{
// Construct a standalone properties object
mlt_properties this = mlt_properties_new( );
{
// Temp string
char temp[ 1024 ];
+ char last[ 1024 ] = "";
// Read each string from the file
while( fgets( temp, 1024, file ) )
// Chomp the string
temp[ strlen( temp ) - 1 ] = '\0';
+ // Check if the line starts with a .
+ if ( temp[ 0 ] == '.' )
+ {
+ char temp2[ 1024 ];
+ sprintf( temp2, "%s%s", last, temp );
+ strcpy( temp, temp2 );
+ }
+ else if ( strchr( temp, '=' ) )
+ {
+ strcpy( last, temp );
+ *( strchr( last, '=' ) ) = '\0';
+ }
+
// Parse and set the property
if ( strcmp( temp, "" ) && temp[ 0 ] != '#' )
mlt_properties_parse( this, temp );
return this;
}
-static inline int generate_hash( char *name )
+static inline int generate_hash( const char *name )
{
int hash = 0;
int i = 1;
real producer.
*/
-static inline void mlt_properties_do_mirror( mlt_properties this, char *name )
+static inline void mlt_properties_do_mirror( mlt_properties this, const char *name )
{
- property_list *list = this->private;
+ property_list *list = this->local;
if ( list->mirror != NULL )
{
char *value = mlt_properties_get( this, name );
}
}
-/** Allow the specification of a mirror.
+/** Maintain ref count to allow multiple uses of an mlt object.
+*/
+
+int mlt_properties_inc_ref( mlt_properties this )
+{
+ int result = 0;
+ if ( this != NULL )
+ {
+ property_list *list = this->local;
+ pthread_mutex_lock( &list->mutex );
+ result = ++ list->ref_count;
+ pthread_mutex_unlock( &list->mutex );
+ }
+ return result;
+}
+
+/** Maintain ref count to allow multiple uses of an mlt object.
+*/
+
+int mlt_properties_dec_ref( mlt_properties this )
+{
+ int result = 0;
+ if ( this != NULL )
+ {
+ property_list *list = this->local;
+ pthread_mutex_lock( &list->mutex );
+ result = -- list->ref_count;
+ pthread_mutex_unlock( &list->mutex );
+ }
+ return result;
+}
+
+/** Return the ref count of this object.
+*/
+
+int mlt_properties_ref_count( mlt_properties this )
+{
+ if ( this != NULL )
+ {
+ property_list *list = this->local;
+ return list->ref_count;
+ }
+ return 0;
+}
+
+/** Mirror properties set on 'this' to 'that'.
*/
void mlt_properties_mirror( mlt_properties this, mlt_properties that )
{
- property_list *list = this->private;
+ property_list *list = this->local;
list->mirror = that;
}
/** 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 mlt_properties_pass( mlt_properties this, mlt_properties that, const char *prefix )
{
int count = mlt_properties_count( that );
int length = strlen( prefix );
/** Locate a property by name
*/
-static inline mlt_property mlt_properties_find( mlt_properties this, char *name )
+static inline mlt_property mlt_properties_find( mlt_properties this, const char *name )
{
- property_list *list = this->private;
+ property_list *list = this->local;
mlt_property value = NULL;
int key = generate_hash( name );
int i = list->hash[ key ] - 1;
/** Add a new property.
*/
-static mlt_property mlt_properties_add( mlt_properties this, char *name )
+static mlt_property mlt_properties_add( mlt_properties this, const 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 += 50;
- list->name = realloc( list->name, list->size * sizeof( char * ) );
+ list->name = realloc( list->name, list->size * sizeof( const char * ) );
list->value = realloc( list->value, list->size * sizeof( mlt_property ) );
}
/** Fetch a property by name - this includes add if not found.
*/
-static mlt_property mlt_properties_fetch( mlt_properties this, char *name )
+static mlt_property mlt_properties_fetch( mlt_properties this, const char *name )
{
// Try to find an existing property first
mlt_property property = mlt_properties_find( this, name );
return property;
}
+/** Pass property 'name' from 'that' to 'this'
+* Who to blame: Zach <zachary.drew@gmail.com>
+*/
+
+void mlt_properties_pass_property( mlt_properties this, mlt_properties that, const char *name )
+{
+ // Make sure the source property isn't null.
+ mlt_property that_prop = mlt_properties_find( that, name );
+ if( that_prop == NULL )
+ return;
+
+ mlt_property_pass( mlt_properties_fetch( this, name ), that_prop );
+}
+
+/** Pass all properties from 'that' to 'this' as found in comma seperated 'list'.
+* Who to blame: Zach <zachary.drew@gmail.com>
+*/
+
+int mlt_properties_pass_list( mlt_properties this, mlt_properties that, const char *list )
+{
+ char *props = strdup( list );
+ char *ptr = props;
+ char *delim = " ,\t\n"; // Any combination of spaces, commas, tabs, and newlines
+ int count, done = 0;
+
+ while( !done )
+ {
+ count = strcspn( ptr, delim );
+
+ if( ptr[count] == '\0' )
+ done = 1;
+ else
+ ptr[count] = '\0'; // Make it a real string
+
+ mlt_properties_pass_property( this, that, ptr );
+
+ ptr += count + 1;
+ ptr += strspn( ptr, delim );
+ }
+
+ free( props );
+
+ return 0;
+}
+
+
/** Set the property.
*/
-int mlt_properties_set( mlt_properties this, char *name, char *value )
+int mlt_properties_set( mlt_properties this, const char *name, const char *value )
{
int error = 1;
mlt_property property = mlt_properties_fetch( this, name );
// Set it if not NULL
- if ( property != NULL )
+ if ( property == NULL )
+ {
+ fprintf( stderr, "Whoops - %s not found (should never occur)\n", name );
+ }
+ else if ( value == NULL )
+ {
+ error = mlt_property_set_string( property, value );
+ mlt_properties_do_mirror( this, name );
+ }
+ else if ( *value != '@' )
{
error = mlt_property_set_string( property, value );
mlt_properties_do_mirror( this, name );
}
+ else if ( value[ 0 ] == '@' )
+ {
+ double total = 0;
+ double 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_double( this, id );
+
+ // Apply the operation
+ switch( op )
+ {
+ case '+':
+ total += current;
+ break;
+ case '-':
+ total -= current;
+ break;
+ case '*':
+ total *= current;
+ break;
+ case '/':
+ total = total / current;
+ break;
+ }
+
+ // Get the next op
+ op = *value != '\0' ? *value ++ : ' ';
+ }
+
+ error = mlt_property_set_double( property, total );
+ mlt_properties_do_mirror( this, name );
+ }
+
+ mlt_events_fire( this, "property-changed", name, NULL );
return error;
}
/** Set or default the property.
*/
-int mlt_properties_set_or_default( mlt_properties this, char *name, char *value, char *def )
+int mlt_properties_set_or_default( mlt_properties this, const char *name, const char *value, const char *def )
{
return mlt_properties_set( this, name, value == NULL ? def : value );
}
/** Get a string value by name.
*/
-char *mlt_properties_get( mlt_properties this, char *name )
+char *mlt_properties_get( mlt_properties this, const char *name )
{
mlt_property value = mlt_properties_find( this, name );
return value == NULL ? NULL : mlt_property_get_string( value );
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;
void *mlt_properties_get_data_at( mlt_properties this, int index, int *size )
{
- property_list *list = this->private;
+ property_list *list = this->local;
if ( index >= 0 && index < list->count )
return mlt_property_get_data( list->value[ index ], size );
return NULL;
int mlt_properties_count( mlt_properties this )
{
- property_list *list = this->private;
+ property_list *list = this->local;
return list->count;
}
/** Set a value by parsing a name=value string
*/
-int mlt_properties_parse( mlt_properties this, char *namevalue )
+int mlt_properties_parse( mlt_properties this, const char *namevalue )
{
char *name = strdup( namevalue );
char *value = NULL;
/** Get a value associated to the name.
*/
-int mlt_properties_get_int( mlt_properties this, char *name )
+int mlt_properties_get_int( mlt_properties this, const char *name )
{
mlt_property value = mlt_properties_find( this, name );
return value == NULL ? 0 : mlt_property_get_int( value );
/** Set a value associated to the name.
*/
-int mlt_properties_set_int( mlt_properties this, char *name, int value )
+int mlt_properties_set_int( mlt_properties this, const char *name, int value )
{
int error = 1;
mlt_properties_do_mirror( this, name );
}
+ mlt_events_fire( this, "property-changed", name, NULL );
+
+ return error;
+}
+
+/** Get a value associated to the name.
+*/
+
+int64_t mlt_properties_get_int64( mlt_properties this, const char *name )
+{
+ mlt_property value = mlt_properties_find( this, name );
+ return value == NULL ? 0 : mlt_property_get_int64( value );
+}
+
+/** Set a value associated to the name.
+*/
+
+int mlt_properties_set_int64( mlt_properties this, const char *name, int64_t value )
+{
+ int error = 1;
+
+ // Fetch the property to work with
+ mlt_property property = mlt_properties_fetch( this, name );
+
+ // Set it if not NULL
+ if ( property != NULL )
+ {
+ error = mlt_property_set_int64( property, value );
+ mlt_properties_do_mirror( this, name );
+ }
+
+ mlt_events_fire( this, "property-changed", name, NULL );
+
return error;
}
/** Get a value associated to the name.
*/
-double mlt_properties_get_double( mlt_properties this, char *name )
+double mlt_properties_get_double( mlt_properties this, const char *name )
{
mlt_property value = mlt_properties_find( this, name );
return value == NULL ? 0 : mlt_property_get_double( value );
/** Set a value associated to the name.
*/
-int mlt_properties_set_double( mlt_properties this, char *name, double value )
+int mlt_properties_set_double( mlt_properties this, const char *name, double value )
{
int error = 1;
mlt_properties_do_mirror( this, name );
}
+ mlt_events_fire( this, "property-changed", name, NULL );
+
return error;
}
/** Get a value associated to the name.
*/
-mlt_position mlt_properties_get_position( mlt_properties this, char *name )
+mlt_position mlt_properties_get_position( mlt_properties this, const char *name )
{
mlt_property value = mlt_properties_find( this, name );
return value == NULL ? 0 : mlt_property_get_position( value );
/** Set a value associated to the name.
*/
-int mlt_properties_set_position( mlt_properties this, char *name, mlt_position value )
+int mlt_properties_set_position( mlt_properties this, const char *name, mlt_position value )
{
int error = 1;
mlt_properties_do_mirror( this, name );
}
+ mlt_events_fire( this, "property-changed", name, NULL );
+
return error;
}
/** Get a value associated to the name.
*/
-void *mlt_properties_get_data( mlt_properties this, char *name, int *length )
+void *mlt_properties_get_data( mlt_properties this, const char *name, int *length )
{
mlt_property value = mlt_properties_find( this, name );
return value == NULL ? NULL : mlt_property_get_data( value, length );
/** Set a value associated to the name.
*/
-int mlt_properties_set_data( mlt_properties this, char *name, void *value, int length, mlt_destructor destroy, mlt_serialiser serialise )
+int mlt_properties_set_data( mlt_properties this, const char *name, void *value, int length, mlt_destructor destroy, mlt_serialiser serialise )
{
int error = 1;
if ( property != NULL )
error = mlt_property_set_data( property, value, length, destroy, serialise );
+ mlt_events_fire( this, "property-changed", name, NULL );
+
return error;
}
/** Rename a property.
*/
-int mlt_properties_rename( mlt_properties this, char *source, char *dest )
+int mlt_properties_rename( mlt_properties this, const char *source, const char *dest )
{
mlt_property value = mlt_properties_find( this, dest );
if ( value == NULL )
{
- property_list *list = this->private;
+ property_list *list = this->local;
int i = 0;
// Locate the item
void mlt_properties_dump( mlt_properties this, FILE *output )
{
- property_list *list = this->private;
+ 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.
+void mlt_properties_debug( mlt_properties this, const char *title, FILE *output )
+{
+ if ( output == NULL ) output = stderr;
+ fprintf( output, "%s: ", title );
+ if ( this != NULL )
+ {
+ property_list *list = this->local;
+ int i = 0;
+ fprintf( output, "[ ref=%d", list->ref_count );
+ for ( i = 0; i < list->count; i ++ )
+ if ( mlt_properties_get( this, list->name[ i ] ) != NULL )
+ fprintf( output, ", %s=%s", list->name[ i ], mlt_properties_get( this, list->name[ i ] ) );
+ else
+ fprintf( output, ", %s=%p", list->name[ i ], mlt_properties_get_data( this, list->name[ i ], NULL ) );
+ fprintf( output, " ]" );
+ }
+ fprintf( output, "\n" );
+}
+
+int mlt_properties_save( mlt_properties this, const char *filename )
+{
+ int error = 1;
+ FILE *f = fopen( filename, "w" );
+ if ( f != NULL )
+ {
+ mlt_properties_dump( this, f );
+ fclose( f );
+ error = 0;
+ }
+ return error;
+}
+
+/* This is a very basic cross platform fnmatch replacement - it will fail in
+** many cases, but for the basic *.XXX and YYY*.XXX, it will work ok.
*/
-void mlt_properties_close( mlt_properties this )
+static int mlt_fnmatch( const char *wild, const char *file )
{
- if ( this != NULL )
+ int f = 0;
+ int w = 0;
+
+ while( f < strlen( file ) && w < strlen( wild ) )
{
- property_list *list = this->private;
- int index = 0;
+ if ( wild[ w ] == '*' )
+ {
+ w ++;
+ if ( w == strlen( wild ) )
+ f = strlen( file );
+ while ( f != strlen( file ) && tolower( file[ f ] ) != tolower( wild[ w ] ) )
+ f ++;
+ }
+ else if ( wild[ w ] == '?' || tolower( file[ f ] ) == tolower( wild[ w ] ) )
+ {
+ f ++;
+ w ++;
+ }
+ else if ( wild[ 0 ] == '*' )
+ {
+ w = 0;
+ }
+ else
+ {
+ return 0;
+ }
+ }
+
+ return strlen( file ) == f && strlen( wild ) == w;
+}
+
+static int mlt_compare( const void *this, const void *that )
+{
+ return strcmp( mlt_property_get_string( *( mlt_property * )this ), mlt_property_get_string( *( mlt_property * )that ) );
+}
+
+/* Obtains an optionally sorted list of the files found in a directory with a specific wild card.
+ * Entries in the list have a numeric name (running from 0 to count - 1). Only values change
+ * position if sort is enabled. Designed to be posix compatible (linux, os/x, mingw etc).
+ */
- // Clean up names and values
- for ( index = list->count - 1; index >= 0; index -- )
+int mlt_properties_dir_list( mlt_properties this, const char *dirname, const char *pattern, int sort )
+{
+ DIR *dir = opendir( dirname );
+
+ if ( dir )
+ {
+ char key[ 20 ];
+ struct dirent *de = readdir( dir );
+ char fullname[ 1024 ];
+ while( de != NULL )
{
- free( list->name[ index ] );
- mlt_property_close( list->value[ index ] );
+ sprintf( key, "%d", mlt_properties_count( this ) );
+ snprintf( fullname, 1024, "%s/%s", dirname, de->d_name );
+ if ( pattern == NULL )
+ mlt_properties_set( this, key, fullname );
+ else if ( de->d_name[ 0 ] != '.' && mlt_fnmatch( pattern, de->d_name ) )
+ mlt_properties_set( this, key, fullname );
+ de = readdir( dir );
}
- // Clear up the list
- free( list->name );
- free( list->value );
- free( list );
+ closedir( dir );
+ }
+
+ if ( sort && mlt_properties_count( this ) )
+ {
+ property_list *list = this->local;
+ qsort( list->value, mlt_properties_count( this ), sizeof( mlt_property ), mlt_compare );
+ }
+
+ return mlt_properties_count( this );
+}
+
+/** Close the list.
+*/
+
+void mlt_properties_close( mlt_properties this )
+{
+ if ( this != NULL && mlt_properties_dec_ref( this ) <= 0 )
+ {
+ if ( this->close != NULL )
+ {
+ this->close( this->close_object );
+ }
+ else
+ {
+ property_list *list = this->local;
+ int index = 0;
- // Free this now if this has no child
- if ( this->child == NULL )
- free( this );
+#if _MLT_PROPERTY_CHECKS_ == 1
+ // Show debug info
+ mlt_properties_debug( this, "Closing", stderr );
+#endif
#ifdef _MLT_PROPERTY_CHECKS_
- // Increment destroyed count
- properties_destroyed ++;
+ // 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 );
+ // Show current stats - these should match when the app is closed
+ fprintf( stderr, "Created %d, destroyed %d\n", properties_created, properties_destroyed );
#endif
+
+ // 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
+ pthread_mutex_destroy( &list->mutex );
+ free( list->name );
+ free( list->value );
+ free( list );
+
+ // Free this now if this has no child
+ if ( this->child == NULL )
+ free( this );
+ }
+ }
+}
+
+/** Determine if the properties list is really just a sequence or ordered list.
+ Returns 0 if false or 1 if true.
+*/
+int mlt_properties_is_sequence( mlt_properties properties )
+{
+ int i;
+ int n = mlt_properties_count( properties );
+ for ( i = 0; i < n; i++ )
+ if ( ! isdigit( mlt_properties_get_name( properties, i )[0] ) )
+ return 0;
+ return 1;
+}
+
+/** YAML Tiny Parser
+ * YAML is a nifty text format popular in the Ruby world as a cleaner,
+ * less verbose alternative to XML. See this Wikipedia topic for an overview:
+ * http://en.wikipedia.org/wiki/YAML
+ * The YAML specification is at:
+ * http://yaml.org/
+ * YAML::Tiny is a Perl module that specifies a subset of YAML that we are
+ * using here (for the same reasons):
+ * http://search.cpan.org/~adamk/YAML-Tiny-1.25/lib/YAML/Tiny.pm
+ */
+
+struct yaml_parser_context
+{
+ mlt_deque stack;
+ unsigned int level;
+ unsigned int index;
+ char block;
+ char *block_name;
+ unsigned int block_indent;
+
+};
+typedef struct yaml_parser_context *yaml_parser;
+
+static unsigned int ltrim( char **s )
+{
+ unsigned int i = 0;
+ char *c = *s;
+ int n = strlen( c );
+ for ( i = 0; i < n && *c == ' '; i++, c++ );
+ *s = c;
+ return i;
+}
+
+static unsigned int rtrim( char *s )
+{
+ int n = strlen( s );
+ int i;
+ for ( i = n; i > 0 && s[i - 1] == ' '; --i )
+ s[i - 1] = 0;
+ return n - i;
+}
+
+static int parse_yaml( yaml_parser context, const char *namevalue )
+{
+ char *name_ = strdup( namevalue );
+ char *name = name_;
+ char *value = NULL;
+ int error = 0;
+ char *ptr = strchr( name, ':' );
+ unsigned int indent = ltrim( &name );
+ mlt_properties properties = mlt_deque_peek_front( context->stack );
+
+ // Ascending one more levels in the tree
+ if ( indent < context->level )
+ {
+ unsigned int i;
+ unsigned int n = ( context->level - indent ) / 2;
+ for ( i = 0; i < n; i++ )
+ mlt_deque_pop_front( context->stack );
+ properties = mlt_deque_peek_front( context->stack );
+ context->level = indent;
+ }
+
+ // Descending a level in the tree
+ else if ( indent > context->level && context->block == 0 )
+ {
+ context->level = indent;
+ }
+
+ // If there is a colon that is not part of a block
+ if ( ptr && ( indent == context->level ) )
+ {
+ // Reset block processing
+ if ( context->block_name )
+ {
+ free( context->block_name );
+ context->block_name = NULL;
+ context->block = 0;
+ }
+
+ // Terminate the name and setup the value pointer
+ *( ptr ++ ) = 0;
+
+ // Trim comment
+ char *comment = strchr( ptr, '#' );
+ if ( comment )
+ {
+ *comment = 0;
+ }
+
+ // Trim leading and trailing spaces from bare value
+ ltrim( &ptr );
+ rtrim( ptr );
+
+ // No value means a child
+ if ( strcmp( ptr, "" ) == 0 )
+ {
+ mlt_properties child = mlt_properties_new();
+ mlt_properties_set_data( properties, name, child, 0,
+ ( mlt_destructor )mlt_properties_close, NULL );
+ mlt_deque_push_front( context->stack, child );
+ context->index = 0;
+ free( name_ );
+ return error;
+ }
+
+ // A dash indicates a sequence item
+ if ( name[0] == '-' )
+ {
+ mlt_properties child = mlt_properties_new();
+ char key[20];
+
+ snprintf( key, sizeof(key), "%d", context->index++ );
+ mlt_properties_set_data( properties, key, child, 0,
+ ( mlt_destructor )mlt_properties_close, NULL );
+ mlt_deque_push_front( context->stack, child );
+
+ name ++;
+ context->level += ltrim( &name ) + 1;
+ properties = child;
+ }
+
+ // Value is quoted
+ if ( *ptr == '\"' )
+ {
+ ptr ++;
+ value = strdup( ptr );
+ if ( value && value[ strlen( value ) - 1 ] == '\"' )
+ value[ strlen( value ) - 1 ] = 0;
+ }
+
+ // Value is folded or unfolded block
+ else if ( *ptr == '|' || *ptr == '>' )
+ {
+ context->block = *ptr;
+ context->block_name = strdup( name );
+ context->block_indent = 0;
+ value = strdup( "" );
+ }
+
+ // Bare value
+ else
+ {
+ value = strdup( ptr );
+ }
+ }
+
+ // A list of scalars
+ else if ( name[0] == '-' )
+ {
+ // Reset block processing
+ if ( context->block_name )
+ {
+ free( context->block_name );
+ context->block_name = NULL;
+ context->block = 0;
+ }
+
+ char key[20];
+
+ snprintf( key, sizeof(key), "%d", context->index++ );
+ ptr = name + 1;
+
+ // Trim comment
+ char *comment = strchr( ptr, '#' );
+ if ( comment )
+ *comment = 0;
+
+ // Trim leading and trailing spaces from bare value
+ ltrim( &ptr );
+ rtrim( ptr );
+
+ // Value is quoted
+ if ( *ptr == '\"' )
+ {
+ ptr ++;
+ value = strdup( ptr );
+ if ( value && value[ strlen( value ) - 1 ] == '\"' )
+ value[ strlen( value ) - 1 ] = 0;
+ }
+
+ // Value is folded or unfolded block
+ else if ( *ptr == '|' || *ptr == '>' )
+ {
+ context->block = *ptr;
+ context->block_name = strdup( key );
+ context->block_indent = 0;
+ value = strdup( "" );
+ }
+
+ // Bare value
+ else
+ {
+ value = strdup( ptr );
+ }
+
+ free( name_ );
+ name = name_ = strdup( key );
+ }
+
+ // Non-folded block
+ else if ( context->block == '|' )
+ {
+ if ( context->block_indent == 0 )
+ context->block_indent = indent;
+ if ( indent > context->block_indent )
+ name = &name_[ context->block_indent ];
+ rtrim( name );
+ char *old_value = mlt_properties_get( properties, context->block_name );
+ value = calloc( 1, strlen( old_value ) + strlen( name ) + 2 );
+ strcpy( value, old_value );
+ if ( strcmp( old_value, "" ) )
+ strcat( value, "\n" );
+ strcat( value, name );
+ name = context->block_name;
+ }
+
+ // Folded block
+ else if ( context->block == '>' )
+ {
+ ltrim( &name );
+ rtrim( name );
+ char *old_value = mlt_properties_get( properties, context->block_name );
+
+ // Blank line (prepended with spaces) is new line
+ if ( strcmp( name, "" ) == 0 )
+ {
+ value = calloc( 1, strlen( old_value ) + 2 );
+ strcat( value, old_value );
+ strcat( value, "\n" );
+ }
+ // Concatenate with space
+ else
+ {
+ value = calloc( 1, strlen( old_value ) + strlen( name ) + 2 );
+ strcat( value, old_value );
+ if ( strcmp( old_value, "" ) && old_value[ strlen( old_value ) - 1 ] != '\n' )
+ strcat( value, " " );
+ strcat( value, name );
+ }
+ name = context->block_name;
+ }
+
+ else
+ {
+ value = strdup( "" );
+ }
+
+ error = mlt_properties_set( properties, name, value );
+
+ free( name_ );
+ free( value );
+
+ return error;
+}
+
+mlt_properties mlt_properties_parse_yaml( const char *filename )
+{
+ // Construct a standalone properties object
+ mlt_properties this = mlt_properties_new( );
+
+ if ( this )
+ {
+ // Open the file
+ FILE *file = fopen( filename, "r" );
+
+ // Load contents of file
+ if ( file )
+ {
+ // Temp string
+ char temp[ 1024 ];
+ char *ptemp = &temp[ 0 ];
+
+ // Parser context
+ yaml_parser context = calloc( 1, sizeof( struct yaml_parser_context ) );
+ context->stack = mlt_deque_init();
+ mlt_deque_push_front( context->stack, this );
+
+ // Read each string from the file
+ while( fgets( temp, 1024, file ) )
+ {
+ // Check for end-of-stream
+ if ( strncmp( ptemp, "...", 3 ) == 0 )
+ break;
+
+ // Chomp the string
+ temp[ strlen( temp ) - 1 ] = '\0';
+
+ // Skip blank lines, comment lines, and document separator
+ if ( strcmp( ptemp, "" ) && ptemp[ 0 ] != '#' && strncmp( ptemp, "---", 3 )
+ && strncmp( ptemp, "%YAML", 5 ) && strncmp( ptemp, "% YAML", 6 ) )
+ parse_yaml( context, temp );
+ }
+
+ // Close the file
+ fclose( file );
+ mlt_deque_close( context->stack );
+ if ( context->block_name )
+ free( context->block_name );
+ free( context );
+ }
}
+
+ // Return the pointer
+ return this;
}
+/** YAML Tiny Serialiser
+*/
+
+/* strbuf is a self-growing string buffer */
+
+#define STRBUF_GROWTH (1024)
+
+struct strbuf_s
+{
+ size_t size;
+ char *string;
+};
+
+typedef struct strbuf_s *strbuf;
+
+static strbuf strbuf_new( )
+{
+ strbuf buffer = calloc( 1, sizeof( struct strbuf_s ) );
+ buffer->size = STRBUF_GROWTH;
+ buffer->string = calloc( 1, buffer->size );
+ return buffer;
+}
+
+static void strbuf_close( strbuf buffer )
+{
+ // We do not free buffer->string; strbuf user must save that pointer
+ // and free it.
+ if ( buffer )
+ free( buffer );
+}
+
+static char *strbuf_printf( strbuf buffer, const char *format, ... )
+{
+ while ( buffer->string )
+ {
+ va_list ap;
+ va_start( ap, format );
+ size_t len = strlen( buffer->string );
+ size_t remain = buffer->size - len - 1;
+ int need = vsnprintf( buffer->string + len, remain, format, ap );
+ va_end( ap );
+ if ( need > -1 && need < remain )
+ break;
+ buffer->string[ len ] = 0;
+ buffer->size += need + STRBUF_GROWTH;
+ buffer->string = realloc( buffer->string, buffer->size );
+ }
+ return buffer->string;
+}
+
+static inline void indent_yaml( strbuf output, int indent )
+{
+ int j;
+ for ( j = 0; j < indent; j++ )
+ strbuf_printf( output, " " );
+}
+
+static void output_yaml_block_literal( strbuf output, const char *value, int indent )
+{
+ char *v = strdup( value );
+ char *sol = v;
+ char *eol = strchr( sol, '\n' );
+
+ while ( eol )
+ {
+ indent_yaml( output, indent );
+ *eol = '\0';
+ strbuf_printf( output, "%s\n", sol );
+ sol = eol + 1;
+ eol = strchr( sol, '\n' );
+ }
+ indent_yaml( output, indent );
+ strbuf_printf( output, "%s\n", sol );
+}
+
+static void serialise_yaml( mlt_properties this, strbuf output, int indent, int is_parent_sequence )
+{
+ property_list *list = this->local;
+ int i = 0;
+
+ for ( i = 0; i < list->count; i ++ )
+ {
+ // This implementation assumes that all data elements are property lists.
+ // Unfortunately, we do not have run time type identification.
+ mlt_properties child = mlt_property_get_data( list->value[ i ], NULL );
+
+ if ( mlt_properties_is_sequence( this ) )
+ {
+ // Ignore hidden/non-serialisable items
+ if ( list->name[ i ][ 0 ] != '_' )
+ {
+ // Indicate a sequence item
+ indent_yaml( output, indent );
+ strbuf_printf( output, "- " );
+
+ // If the value can be represented as a string
+ const char *value = mlt_properties_get( this, list->name[ i ] );
+ if ( value && strcmp( value, "" ) )
+ {
+ // Determine if this is an unfolded block literal
+ if ( strchr( value, '\n' ) )
+ {
+ strbuf_printf( output, "|\n" );
+ output_yaml_block_literal( output, value, indent + strlen( list->name[ i ] ) + strlen( "|" ) );
+ }
+ else
+ {
+ strbuf_printf( output, "%s\n", value );
+ }
+ }
+ }
+ // Recurse on child
+ if ( child )
+ serialise_yaml( child, output, indent + 2, 1 );
+ }
+ else
+ {
+ // Assume this is a normal map-oriented properties list
+ const char *value = mlt_properties_get( this, list->name[ i ] );
+
+ // Ignore hidden/non-serialisable items
+ // If the value can be represented as a string
+ if ( list->name[ i ][ 0 ] != '_' && value && strcmp( value, "" ) )
+ {
+ if ( is_parent_sequence == 0 )
+ indent_yaml( output, indent );
+ else
+ is_parent_sequence = 0;
+
+ // Determine if this is an unfolded block literal
+ if ( strchr( value, '\n' ) )
+ {
+ strbuf_printf( output, "%s: |\n", list->name[ i ] );
+ output_yaml_block_literal( output, value, indent + strlen( list->name[ i ] ) + strlen( ": " ) );
+ }
+ else
+ {
+ strbuf_printf( output, "%s: %s\n", list->name[ i ], value );
+ }
+ }
+
+ // Output a child as a map item
+ if ( child )
+ {
+ indent_yaml( output, indent );
+ strbuf_printf( output, "%s:\n", list->name[ i ] );
+
+ // Recurse on child
+ serialise_yaml( child, output, indent + 2, 0 );
+ }
+ }
+ }
+}
+
+/** Serialise the properties as a string of YAML Tiny.
+ The caller must free the returned string.
+*/
+
+char *mlt_properties_serialise_yaml( mlt_properties this )
+{
+ strbuf b = strbuf_new();
+ strbuf_printf( b, "---\n" );
+ serialise_yaml( this, b, 0, 0 );
+ strbuf_printf( b, "...\n" );
+ char *ret = b->string;
+ strbuf_close( b );
+ return ret;
+}
projects / melted / blobdiff