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Add helper for javascript typed arrays

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For scalar vector fields, emit an Array helper that
returns a typed array view of the underlying bytes buffer.
This commit is contained in:
Robert Nix
2016-02-12 12:27:28 -06:00
parent 2f5d7ae645
commit 9d92aeb182
3 changed files with 44 additions and 1 deletions
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14
src/idl_gen_js.cpp
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@@ -511,12 +511,24 @@ static void GenStruct(const Parser &parser, StructDef &struct_def,
}
code += "};\n\n";
// Emit a length helper
// Emit vector helpers
if (field.value.type.base_type == BASE_TYPE_VECTOR) {
// Emit a length helper
GenDocComment(code_ptr, "@returns {number}");
code += object_name + ".prototype." + MakeCamel(field.name, false);
code += "Length = function() {\n" + offset_prefix;
code += "this.bb.__vector_len(this.bb_pos + offset) : 0;\n};\n\n";
// For scalar types, emit a typed array helper
auto vectorType = field.value.type.VectorType();
if (IsScalar(vectorType.base_type)) {
GenDocComment(code_ptr, "@returns {" + GenType(vectorType) + "Array}");
code += object_name + ".prototype." + MakeCamel(field.name, false);
code += "Array = function() {\n" + offset_prefix;
code += "new " + GenType(vectorType) + "Array(this.bb.bytes().buffer, "
"this.bb.__vector(this.bb_pos + offset), "
"this.bb.__vector_len(this.bb_pos + offset)) : null;\n};\n\n";
}
}
}