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use std::panic;
use webcore::ffi;
pub fn initialize() {
static mut INITIALIZED: bool = false;
unsafe {
if INITIALIZED {
return;
}
INITIALIZED = true;
}
js! { @(no_return)
Module.STDWEB = {};
Module.STDWEB.to_js = function to_js( address ) {
var kind = HEAPU8[ address + 12 ];
if( kind === 0 ) {
return undefined;
} else if( kind === 1 ) {
return null;
} else if( kind === 2 ) {
return HEAP32[ address / 4 ];
} else if( kind === 3 ) {
return HEAPF64[ address / 8 ];
} else if( kind === 4 ) {
var pointer = HEAPU32[ address / 4 ];
var length = HEAPU32[ (address + 4) / 4 ];
return Module.STDWEB.to_js_string( pointer, length );
} else if( kind === 5 ) {
return false;
} else if( kind === 6 ) {
return true;
} else if( kind === 7 ) {
var pointer = HEAPU32[ address / 4 ];
var length = HEAPU32[ (address + 4) / 4 ];
var output = [];
for( var i = 0; i < length; ++i ) {
output.push( Module.STDWEB.to_js( pointer + i * 16 ) );
}
return output;
} else if( kind === 8 ) {
var value_array_pointer = HEAPU32[ address / 4 ];
var length = HEAPU32[ (address + 4) / 4 ];
var key_array_pointer = HEAPU32[ (address + 8) / 4 ];
var output = {};
for( var i = 0; i < length; ++i ) {
var key_pointer = HEAPU32[ (key_array_pointer + i * 8) / 4 ];
var key_length = HEAPU32[ (key_array_pointer + 4 + i * 8) / 4 ];
var key = Module.STDWEB.to_js_string( key_pointer, key_length );
var value = Module.STDWEB.to_js( value_array_pointer + i * 16 );
output[ key ] = value;
}
return output;
} else if( kind === 9 ) {
return Module.STDWEB.acquire_js_reference( HEAP32[ address / 4 ] );
} else if( kind === 10 ) {
var adapter_pointer = HEAPU32[ address / 4 ];
var pointer = HEAPU32[ (address + 4) / 4 ];
var deallocator_pointer = HEAPU32[ (address + 8) / 4 ];
var output = function() {
var args = _malloc( 16 );
Module.STDWEB.from_js( args, arguments );
Runtime.dynCall( "vii", adapter_pointer, [pointer, args] );
var result = Module.STDWEB.tmp;
Module.STDWEB.tmp = null;
return result;
};
output.drop = function() {
output.drop = null;
Runtime.dynCall( "vi", deallocator_pointer, [pointer] );
};
return output;
}
};
};
js! { @(no_return)
Module.STDWEB.from_js = function from_js( address, value ) {
var kind = Object.prototype.toString.call( value );
if( kind === "[object String]" ) {
var length = lengthBytesUTF8( value );
var pointer = _malloc( length + 1 );
stringToUTF8( value, pointer, length + 1 );
HEAPU8[ address + 12 ] = 4;
HEAPU32[ address / 4 ] = pointer;
HEAPU32[ (address + 4) / 4 ] = length;
} else if( kind === "[object Number]" ) {
if( value === (value|0) ) {
HEAPU8[ address + 12 ] = 2;
HEAP32[ address / 4 ] = value;
} else {
HEAPU8[ address + 12 ] = 3;
HEAPF64[ address / 8 ] = value;
}
} else if( value === null ) {
HEAPU8[ address + 12 ] = 1;
} else if( value === undefined ) {
HEAPU8[ address + 12 ] = 0;
} else if( value === false ) {
HEAPU8[ address + 12 ] = 5;
} else if( value === true ) {
HEAPU8[ address + 12 ] = 6;
} else if( kind === "[object Array]" || kind === "[object Arguments]" ) {
var length = value.length;
var pointer = _malloc( length * 16 );
HEAPU8[ address + 12 ] = 7;
HEAPU32[ address / 4 ] = pointer;
HEAPU32[ (address + 4) / 4 ] = length;
for( var i = 0; i < length; ++i ) {
Module.STDWEB.from_js( pointer + i * 16, value[ i ] );
}
} else if( kind === "[object Object]" ) {
var keys = Object.keys( value );
var length = keys.length;
var key_array_pointer = _malloc( length * 8 );
var value_array_pointer = _malloc( length * 16 );
HEAPU8[ address + 12 ] = 8;
HEAPU32[ address / 4 ] = value_array_pointer;
HEAPU32[ (address + 4) / 4 ] = length;
HEAPU32[ (address + 8) / 4 ] = key_array_pointer;
for( var i = 0; i < length; ++i ) {
var key = keys[ i ];
var key_length = lengthBytesUTF8( key );
var key_pointer = _malloc( key_length + 1 );
stringToUTF8( key, key_pointer, key_length + 1 );
var key_address = key_array_pointer + i * 8;
HEAPU32[ key_address / 4 ] = key_pointer;
HEAPU32[ (key_address + 4) / 4 ] = key_length;
Module.STDWEB.from_js( value_array_pointer + i * 16, value[ key ] );
}
} else {
var refid = Module.STDWEB.acquire_rust_reference( value );
HEAPU8[ address + 12 ] = 9;
HEAP32[ address / 4 ] = refid;
}
};
};
js! { @(no_return)
Module.STDWEB.to_js_string = function to_js_string( index, length ) {
index = index|0;
length = length|0;
var end = (index|0) + (length|0);
var output = "";
while( index < end ) {
var x = HEAPU8[ index++ ];
if( x < 128 ) {
output += String.fromCharCode( x );
continue;
}
var init = (x & (0x7F >> 2));
var y = 0;
if( index < end ) {
y = HEAPU8[ index++ ];
}
var ch = (init << 6) | (y & 63);
if( x >= 0xE0 ) {
let z = 0;
if( index < end ) {
z = HEAPU8[ index++ ];
}
let y_z = ((y & 63) << 6) | (z & 63);
ch = init << 12 | y_z;
if( x >= 0xF0 ) {
let w = 0;
if( index < end ) {
w = HEAPU8[ index++ ];
}
ch = (init & 7) << 18 | ((y_z << 6) | (w & 63));
}
}
output += String.fromCharCode( ch );
continue;
}
return output;
};
};
js! { @(no_return)
var id_to_ref_map = {};
var id_to_refcount_map = {};
var ref_to_id_map = new WeakMap();
var last_refid = 1;
Module.STDWEB.acquire_rust_reference = function( reference ) {
if( reference === undefined || reference === null ) {
return 0;
}
var refid = ref_to_id_map.get( reference );
if( refid === undefined ) {
refid = last_refid++;
ref_to_id_map.set( reference, refid );
id_to_ref_map[ refid ] = reference;
id_to_refcount_map[ refid ] = 1;
} else {
id_to_refcount_map[ refid ]++;
}
return refid;
};
Module.STDWEB.acquire_js_reference = function( refid ) {
return id_to_ref_map[ refid ];
};
Module.STDWEB.increment_refcount = function( refid ) {
id_to_refcount_map[ refid ]++;
};
Module.STDWEB.decrement_refcount = function( refid ) {
id_to_refcount_map[ refid ]--;
if( id_to_refcount_map[ refid ] === 0 ) {
var reference = id_to_ref_map[ refid ];
delete id_to_ref_map[ refid ];
delete id_to_refcount_map[ refid ];
ref_to_id_map.delete( reference );
}
};
}
if cfg!( test ) == false {
panic::set_hook( Box::new( |info| {
em_asm_int!( "console.error( 'Encountered a panic!' );" );
if let Some( value ) = info.payload().downcast_ref::< String >() {
em_asm_int!( "\
console.error( 'Panic error message:', Module.STDWEB.to_js_string( $0, $1 ) );\
", value.as_ptr(), value.len() );
}
if let Some( location ) = info.location() {
let file = location.file();
em_asm_int!( "\
console.error( 'Panic location:', Module.STDWEB.to_js_string( $0, $1 ) + ':' + $2 );\
", file.as_ptr(), file.len(), location.line() );
}
}));
}
}
pub fn event_loop() -> ! {
unsafe {
ffi::emscripten_set_main_loop( Some( ffi::emscripten_pause_main_loop ), 0, 1 );
}
unreachable!();
}