mirror of
https://github.com/fluencelabs/wasm-utils
synced 2025-03-27 16:31:05 +00:00
74 lines
2.9 KiB
HTML
74 lines
2.9 KiB
HTML
<html>
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<head>
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<script>
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// Check for wasm support.
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if (!('WebAssembly' in window)) {
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alert('you need a browser with wasm support enabled :(');
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}
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function loadWebAssembly(filename, imports) {
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return fetch(filename)
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.then(response => response.arrayBuffer())
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.then(buffer => WebAssembly.compile(buffer))
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.then(module => {
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imports = imports || {};
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imports.env = imports.env || {};
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var env = imports.env;
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imports.env.memoryBase = imports.env.memoryBase || 0;
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imports.env.tableBase = imports.env.tableBase || 0;
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/* rust/emscripten imports
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(import "env" "DYNAMICTOP_PTR" (global (;0;) i32))
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(import "env" "STACKTOP" (global (;1;) i32))
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(import "env" "STACK_MAX" (global (;2;) i32))
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(import "env" "enlargeMemory" (func (;0;) (type 0)))
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(import "env" "getTotalMemory" (func (;1;) (type 0)))
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(import "env" "abortOnCannotGrowMemory" (func (;2;) (type 0)))
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(import "env" "_abort" (func (;3;) (type 1)))
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(import "env" "___setErrNo" (func (;4;) (type 2)))
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(import "env" "memory" (memory (;0;) 256 256))
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(import "env" "table" (table (;0;) 0 0 anyfunc))
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(import "env" "memoryBase" (global (;3;) i32))
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(import "env" "tableBase" (global (;4;) i32))
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*/
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env.DYNAMICTOP_PTR = env.DYNAMICTOP_PTR || 0;
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env.STACKTOP = env.STACKTOP || 0;
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env.STACK_MAX = env.STACK_MAX || 5*1024*1024;
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env.enlargeMemory = env.enlargeMemory || function() { throw "error enlarging memory"; };
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env.getTotalMemory = env.getTotalMemory || function() { return 65536 * 256; };
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env.abortOnCannotGrowMemory = env.abortOnCannotGrowMemory || function() { throw "abort growing memory"; };
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env._abort = env.abortOnCannotGrowMemory || function() { throw "abort"; };
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env.___setErrNo = env.abortOnCannotGrowMemory || function() { throw "setting error no"; };
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env.memoryBase = env.memoryBase || 0;
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env.tableBase = env.tableBase || 0;
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if (!imports.env.memory) {
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imports.env.memory = new WebAssembly.Memory({ initial: 256, maximum: 256 });
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}
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if (!imports.env.table) {
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imports.env.table = new WebAssembly.Table({ initial: 0, maximum: 0, element: 'anyfunc' });
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}
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return new WebAssembly.Instance(module, imports);
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});
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}
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loadWebAssembly('out/contract.wasm')
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.then(instance => {
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var exports = instance.exports;
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var call = exports._call;
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var button = document.getElementById('do-call');
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button.value = 'Execute call';
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button.addEventListener('click', function() {
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call();
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}, false);
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}
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);
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</script>
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</head>
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<body>
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<input type="button" id="do-call" value="(waiting for WebAssembly)"/>
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</body>
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</html> |