| /* |
| * Copyright 2014 Google Inc. All rights reserved. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| // independent from idl_parser, since this code is not needed for most clients |
| |
| #include "flatbuffers/flatbuffers.h" |
| #include "flatbuffers/idl.h" |
| #include "flatbuffers/util.h" |
| #include "flatbuffers/code_generators.h" |
| |
| namespace flatbuffers { |
| |
| static std::string GeneratedFileName(const std::string &path, |
| const std::string &file_name) { |
| return path + file_name + "_generated.js"; |
| } |
| |
| namespace js { |
| // Iterate through all definitions we haven't generate code for (enums, structs, |
| // and tables) and output them to a single file. |
| class JsGenerator : public BaseGenerator { |
| public: |
| JsGenerator(const Parser &parser, const std::string &path, |
| const std::string &file_name) |
| : BaseGenerator(parser, path, file_name, "", "."){}; |
| // Iterate through all definitions we haven't generate code for (enums, |
| // structs, and tables) and output them to a single file. |
| bool generate() { |
| if (IsEverythingGenerated()) return true; |
| |
| std::string enum_code, struct_code, exports_code, code; |
| generateEnums(&enum_code, &exports_code); |
| generateStructs(&struct_code, &exports_code); |
| |
| code = code + "// " + FlatBuffersGeneratedWarning(); |
| |
| // Generate code for all the namespace declarations. |
| GenNamespaces(&code, &exports_code); |
| |
| // Output the main declaration code from above. |
| code += enum_code; |
| code += struct_code; |
| |
| if (!exports_code.empty() && !parser_.opts.skip_js_exports) { |
| code += "// Exports for Node.js and RequireJS\n"; |
| code += exports_code; |
| } |
| |
| return SaveFile(GeneratedFileName(path_, file_name_).c_str(), code, false); |
| } |
| |
| private: |
| // Generate code for all enums. |
| void generateEnums(std::string *enum_code_ptr, |
| std::string *exports_code_ptr) { |
| for (auto it = parser_.enums_.vec.begin(); it != parser_.enums_.vec.end(); |
| ++it) { |
| auto &enum_def = **it; |
| GenEnum(enum_def, enum_code_ptr, exports_code_ptr); |
| } |
| } |
| |
| // Generate code for all structs. |
| void generateStructs(std::string *decl_code_ptr, |
| std::string *exports_code_ptr) { |
| for (auto it = parser_.structs_.vec.begin(); |
| it != parser_.structs_.vec.end(); ++it) { |
| auto &struct_def = **it; |
| GenStruct(parser_, struct_def, decl_code_ptr, exports_code_ptr); |
| } |
| } |
| void GenNamespaces(std::string *code_ptr, std::string *exports_ptr) { |
| std::set<std::string> namespaces; |
| |
| for (auto it = parser_.namespaces_.begin(); |
| it != parser_.namespaces_.end(); ++it) { |
| std::string namespace_so_far; |
| |
| // Gather all parent namespaces for this namespace |
| for (auto component = (*it)->components.begin(); |
| component != (*it)->components.end(); ++component) { |
| if (!namespace_so_far.empty()) { |
| namespace_so_far += '.'; |
| } |
| namespace_so_far += *component; |
| namespaces.insert(namespace_so_far); |
| } |
| } |
| |
| // Make sure parent namespaces come before child namespaces |
| std::vector<std::string> sorted_namespaces( |
| namespaces.begin(), namespaces.end()); |
| std::sort(sorted_namespaces.begin(), sorted_namespaces.end()); |
| |
| // Emit namespaces in a form that Closure Compiler can optimize |
| std::string &code = *code_ptr; |
| std::string &exports = *exports_ptr; |
| for (auto it = sorted_namespaces.begin(); |
| it != sorted_namespaces.end(); it++) { |
| code += "/**\n * @const\n * @namespace\n */\n"; |
| if (it->find('.') == std::string::npos) { |
| code += "var "; |
| exports += "this." + *it + " = " + *it + ";\n"; |
| } |
| code += *it + " = " + *it + " || {};\n\n"; |
| } |
| } |
| |
| // Generate a documentation comment, if available. |
| static void GenDocComment(const std::vector<std::string> &dc, |
| std::string *code_ptr, |
| const std::string &extra_lines, |
| const char *indent = nullptr) { |
| if (dc.empty() && extra_lines.empty()) { |
| // Don't output empty comment blocks with 0 lines of comment content. |
| return; |
| } |
| |
| std::string &code = *code_ptr; |
| if (indent) code += indent; |
| code += "/**\n"; |
| for (auto it = dc.begin(); it != dc.end(); ++it) { |
| if (indent) code += indent; |
| code += " *" + *it + "\n"; |
| } |
| if (!extra_lines.empty()) { |
| if (!dc.empty()) { |
| if (indent) code += indent; |
| code += " *\n"; |
| } |
| if (indent) code += indent; |
| std::string::size_type start = 0; |
| for (;;) { |
| auto end = extra_lines.find('\n', start); |
| if (end != std::string::npos) { |
| code += " * " + extra_lines.substr(start, end - start) + "\n"; |
| start = end + 1; |
| } else { |
| code += " * " + extra_lines.substr(start) + "\n"; |
| break; |
| } |
| } |
| } |
| if (indent) code += indent; |
| code += " */\n"; |
| } |
| |
| static void GenDocComment(std::string *code_ptr, |
| const std::string &extra_lines) { |
| GenDocComment(std::vector<std::string>(), code_ptr, extra_lines); |
| } |
| |
| // Generate an enum declaration and an enum string lookup table. |
| void GenEnum(EnumDef &enum_def, std::string *code_ptr, |
| std::string *exports_ptr) { |
| if (enum_def.generated) return; |
| std::string &code = *code_ptr; |
| std::string &exports = *exports_ptr; |
| GenDocComment(enum_def.doc_comment, code_ptr, "@enum"); |
| if (enum_def.defined_namespace->components.empty()) { |
| code += "var "; |
| exports += "this." + enum_def.name + " = " + enum_def.name + ";\n"; |
| } |
| code += WrapInNameSpace(enum_def) + " = {\n"; |
| for (auto it = enum_def.vals.vec.begin(); |
| it != enum_def.vals.vec.end(); ++it) { |
| auto &ev = **it; |
| if (!ev.doc_comment.empty()) { |
| if (it != enum_def.vals.vec.begin()) { |
| code += '\n'; |
| } |
| GenDocComment(ev.doc_comment, code_ptr, "", " "); |
| } |
| code += " " + ev.name + ": " + NumToString(ev.value); |
| code += (it + 1) != enum_def.vals.vec.end() ? ",\n" : "\n"; |
| } |
| code += "};\n\n"; |
| } |
| |
| static std::string GenType(const Type &type) { |
| switch (type.base_type) { |
| case BASE_TYPE_BOOL: |
| case BASE_TYPE_CHAR: return "Int8"; |
| case BASE_TYPE_UTYPE: |
| case BASE_TYPE_UCHAR: return "Uint8"; |
| case BASE_TYPE_SHORT: return "Int16"; |
| case BASE_TYPE_USHORT: return "Uint16"; |
| case BASE_TYPE_INT: return "Int32"; |
| case BASE_TYPE_UINT: return "Uint32"; |
| case BASE_TYPE_LONG: return "Int64"; |
| case BASE_TYPE_ULONG: return "Uint64"; |
| case BASE_TYPE_FLOAT: return "Float32"; |
| case BASE_TYPE_DOUBLE: return "Float64"; |
| case BASE_TYPE_STRING: return "String"; |
| case BASE_TYPE_VECTOR: return GenType(type.VectorType()); |
| case BASE_TYPE_STRUCT: return type.struct_def->name; |
| default: return "Table"; |
| } |
| } |
| |
| std::string GenGetter(const Type &type, const std::string &arguments) { |
| switch (type.base_type) { |
| case BASE_TYPE_STRING: return "this.bb.__string" + arguments; |
| case BASE_TYPE_STRUCT: return "this.bb.__struct" + arguments; |
| case BASE_TYPE_UNION: return "this.bb.__union" + arguments; |
| case BASE_TYPE_VECTOR: return GenGetter(type.VectorType(), arguments); |
| default: { |
| auto getter = "this.bb.read" + MakeCamel(GenType(type)) + arguments; |
| if (type.base_type == BASE_TYPE_BOOL) { |
| getter = "!!" + getter; |
| } |
| if (type.enum_def) { |
| getter = "/** @type {" + WrapInNameSpace(*type.enum_def) + "} */ (" + |
| getter + ")"; |
| } |
| return getter; |
| } |
| } |
| } |
| |
| std::string GenDefaultValue(const Value &value, const std::string &context) { |
| if (value.type.enum_def) { |
| if (auto val = value.type.enum_def->ReverseLookup( |
| atoi(value.constant.c_str()), false)) { |
| return WrapInNameSpace(*value.type.enum_def) + "." + val->name; |
| } |
| } |
| |
| switch (value.type.base_type) { |
| case BASE_TYPE_BOOL: |
| return value.constant == "0" ? "false" : "true"; |
| |
| case BASE_TYPE_STRING: |
| return "null"; |
| |
| case BASE_TYPE_LONG: |
| case BASE_TYPE_ULONG: { |
| int64_t constant = StringToInt(value.constant.c_str()); |
| return context + ".createLong(" + NumToString((int32_t)constant) + |
| ", " + NumToString((int32_t)(constant >> 32)) + ")"; |
| } |
| |
| default: |
| return value.constant; |
| } |
| } |
| |
| std::string GenTypeName(const Type &type, bool input) { |
| if (!input) { |
| if (type.base_type == BASE_TYPE_STRING) { |
| return "string|Uint8Array"; |
| } |
| if (type.base_type == BASE_TYPE_STRUCT) { |
| return WrapInNameSpace(*type.struct_def); |
| } |
| } |
| |
| switch (type.base_type) { |
| case BASE_TYPE_BOOL: return "boolean"; |
| case BASE_TYPE_LONG: |
| case BASE_TYPE_ULONG: return "flatbuffers.Long"; |
| default: |
| if (IsScalar(type.base_type)) { |
| if (type.enum_def) { |
| return WrapInNameSpace(*type.enum_def); |
| } |
| return "number"; |
| } |
| return "flatbuffers.Offset"; |
| } |
| } |
| |
| // Returns the method name for use with add/put calls. |
| static std::string GenWriteMethod(const Type &type) { |
| // Forward to signed versions since unsigned versions don't exist |
| switch (type.base_type) { |
| case BASE_TYPE_UTYPE: |
| case BASE_TYPE_UCHAR: return GenWriteMethod(Type(BASE_TYPE_CHAR)); |
| case BASE_TYPE_USHORT: return GenWriteMethod(Type(BASE_TYPE_SHORT)); |
| case BASE_TYPE_UINT: return GenWriteMethod(Type(BASE_TYPE_INT)); |
| case BASE_TYPE_ULONG: return GenWriteMethod(Type(BASE_TYPE_LONG)); |
| default: break; |
| } |
| |
| return IsScalar(type.base_type) |
| ? MakeCamel(GenType(type)) |
| : (IsStruct(type) ? "Struct" : "Offset"); |
| } |
| |
| template <typename T> |
| static std::string MaybeAdd(T value) { |
| return value != 0 ? " + " + NumToString(value) : ""; |
| } |
| |
| template <typename T> |
| static std::string MaybeScale(T value) { |
| return value != 1 ? " * " + NumToString(value) : ""; |
| } |
| |
| void GenStructArgs(const StructDef &struct_def, |
| std::string *annotations, |
| std::string *arguments, |
| const std::string &nameprefix) { |
| for (auto it = struct_def.fields.vec.begin(); |
| it != struct_def.fields.vec.end(); ++it) { |
| auto &field = **it; |
| if (IsStruct(field.value.type)) { |
| // Generate arguments for a struct inside a struct. To ensure names |
| // don't clash, and to make it obvious these arguments are constructing |
| // a nested struct, prefix the name with the field name. |
| GenStructArgs(*field.value.type.struct_def, annotations, arguments, |
| nameprefix + field.name + "_"); |
| } else { |
| *annotations += "@param {" + GenTypeName(field.value.type, true); |
| *annotations += "} " + nameprefix + field.name + "\n"; |
| *arguments += ", " + nameprefix + field.name; |
| } |
| } |
| } |
| |
| static void GenStructBody(const StructDef &struct_def, |
| std::string *body, |
| const std::string &nameprefix) { |
| *body += " builder.prep("; |
| *body += NumToString(struct_def.minalign) + ", "; |
| *body += NumToString(struct_def.bytesize) + ");\n"; |
| |
| for (auto it = struct_def.fields.vec.rbegin(); |
| it != struct_def.fields.vec.rend(); ++it) { |
| auto &field = **it; |
| if (field.padding) { |
| *body += " builder.pad(" + NumToString(field.padding) + ");\n"; |
| } |
| if (IsStruct(field.value.type)) { |
| // Generate arguments for a struct inside a struct. To ensure names |
| // don't clash, and to make it obvious these arguments are constructing |
| // a nested struct, prefix the name with the field name. |
| GenStructBody(*field.value.type.struct_def, body, |
| nameprefix + field.name + "_"); |
| } else { |
| *body += " builder.write" + GenWriteMethod(field.value.type) + "("; |
| if (field.value.type.base_type == BASE_TYPE_BOOL) { |
| *body += "+"; |
| } |
| *body += nameprefix + field.name + ");\n"; |
| } |
| } |
| } |
| |
| // Generate an accessor struct with constructor for a flatbuffers struct. |
| void GenStruct(const Parser &parser, StructDef &struct_def, std::string *code_ptr, std::string *exports_ptr) { |
| if (struct_def.generated) return; |
| std::string &code = *code_ptr; |
| std::string &exports = *exports_ptr; |
| |
| // Emit constructor |
| bool isStatement = struct_def.defined_namespace->components.empty(); |
| std::string object_name = WrapInNameSpace(struct_def); |
| GenDocComment(struct_def.doc_comment, code_ptr, "@constructor"); |
| if (isStatement) { |
| exports += "this." + struct_def.name + " = " + struct_def.name + ";\n"; |
| code += "function " + object_name; |
| } else { |
| code += object_name + " = function"; |
| } |
| code += "() {\n"; |
| code += " /**\n"; |
| code += " * @type {flatbuffers.ByteBuffer}\n"; |
| code += " */\n"; |
| code += " this.bb = null;\n"; |
| code += "\n"; |
| code += " /**\n"; |
| code += " * @type {number}\n"; |
| code += " */\n"; |
| code += " this.bb_pos = 0;\n"; |
| code += isStatement ? "}\n\n" : "};\n\n"; |
| |
| // Generate the __init method that sets the field in a pre-existing |
| // accessor object. This is to allow object reuse. |
| code += "/**\n"; |
| code += " * @param {number} i\n"; |
| code += " * @param {flatbuffers.ByteBuffer} bb\n"; |
| code += " * @returns {" + object_name + "}\n"; |
| code += " */\n"; |
| code += object_name + ".prototype.__init = function(i, bb) {\n"; |
| code += " this.bb_pos = i;\n"; |
| code += " this.bb = bb;\n"; |
| code += " return this;\n"; |
| code += "};\n\n"; |
| |
| // Generate a special accessor for the table that when used as the root of a |
| // FlatBuffer |
| if (!struct_def.fixed) { |
| GenDocComment(code_ptr, |
| "@param {flatbuffers.ByteBuffer} bb\n" |
| "@param {" + object_name + "=} obj\n" |
| "@returns {" + object_name + "}"); |
| code += object_name + ".getRootAs" + struct_def.name; |
| code += " = function(bb, obj) {\n"; |
| code += " return (obj || new " + object_name; |
| code += ").__init(bb.readInt32(bb.position()) + bb.position(), bb);\n"; |
| code += "};\n\n"; |
| |
| // Generate the identifier check method |
| if (parser_.root_struct_def_ == &struct_def && |
| !parser_.file_identifier_.empty()) { |
| GenDocComment(code_ptr, |
| "@param {flatbuffers.ByteBuffer} bb\n" |
| "@returns {boolean}"); |
| code += object_name + ".bufferHasIdentifier = function(bb) {\n"; |
| code += " return bb.__has_identifier('" + parser_.file_identifier_; |
| code += "');\n};\n\n"; |
| } |
| } |
| |
| // Emit field accessors |
| for (auto it = struct_def.fields.vec.begin(); |
| it != struct_def.fields.vec.end(); ++it) { |
| auto &field = **it; |
| if (field.deprecated) continue; |
| auto offset_prefix = " var offset = this.bb.__offset(this.bb_pos, " + |
| NumToString(field.value.offset) + ");\n return offset ? "; |
| |
| // Emit a scalar field |
| if (IsScalar(field.value.type.base_type) || |
| field.value.type.base_type == BASE_TYPE_STRING) { |
| GenDocComment(field.doc_comment, code_ptr, |
| std::string(field.value.type.base_type == BASE_TYPE_STRING ? |
| "@param {flatbuffers.Encoding=} optionalEncoding\n" : "") + |
| "@returns {" + GenTypeName(field.value.type, false) + "}"); |
| code += object_name + ".prototype." + MakeCamel(field.name, false); |
| code += " = function("; |
| if (field.value.type.base_type == BASE_TYPE_STRING) { |
| code += "optionalEncoding"; |
| } |
| code += ") {\n"; |
| if (struct_def.fixed) { |
| code += " return " + GenGetter(field.value.type, "(this.bb_pos" + |
| MaybeAdd(field.value.offset) + ")") + ";\n"; |
| } else { |
| std::string index = "this.bb_pos + offset"; |
| if (field.value.type.base_type == BASE_TYPE_STRING) { |
| index += ", optionalEncoding"; |
| } |
| code += offset_prefix + GenGetter(field.value.type, |
| "(" + index + ")") + " : " + GenDefaultValue(field.value, "this.bb"); |
| code += ";\n"; |
| } |
| } |
| |
| // Emit an object field |
| else { |
| switch (field.value.type.base_type) { |
| case BASE_TYPE_STRUCT: { |
| auto type = WrapInNameSpace(*field.value.type.struct_def); |
| GenDocComment(field.doc_comment, code_ptr, |
| "@param {" + type + "=} obj\n@returns {" + type + "}"); |
| code += object_name + ".prototype." + MakeCamel(field.name, false); |
| code += " = function(obj) {\n"; |
| if (struct_def.fixed) { |
| code += " return (obj || new " + type; |
| code += ").__init(this.bb_pos"; |
| code += MaybeAdd(field.value.offset) + ", this.bb);\n"; |
| } else { |
| code += offset_prefix + "(obj || new " + type + ").__init("; |
| code += field.value.type.struct_def->fixed |
| ? "this.bb_pos + offset" |
| : "this.bb.__indirect(this.bb_pos + offset)"; |
| code += ", this.bb) : null;\n"; |
| } |
| break; |
| } |
| |
| case BASE_TYPE_VECTOR: { |
| auto vectortype = field.value.type.VectorType(); |
| auto vectortypename = GenTypeName(vectortype, false); |
| auto inline_size = InlineSize(vectortype); |
| auto index = "this.bb.__vector(this.bb_pos + offset) + index" + |
| MaybeScale(inline_size); |
| std::string args = "@param {number} index\n"; |
| if (vectortype.base_type == BASE_TYPE_STRUCT) { |
| args += "@param {" + vectortypename + "=} obj\n"; |
| } else if (vectortype.base_type == BASE_TYPE_STRING) { |
| args += "@param {flatbuffers.Encoding=} optionalEncoding\n"; |
| } |
| GenDocComment(field.doc_comment, code_ptr, args + |
| "@returns {" + vectortypename + "}"); |
| code += object_name + ".prototype." + MakeCamel(field.name, false); |
| code += " = function(index"; |
| if (vectortype.base_type == BASE_TYPE_STRUCT) { |
| code += ", obj"; |
| } else if (vectortype.base_type == BASE_TYPE_STRING) { |
| code += ", optionalEncoding"; |
| } |
| code += ") {\n"; |
| if (vectortype.base_type == BASE_TYPE_STRUCT) { |
| code += offset_prefix + "(obj || new " + vectortypename; |
| code += ").__init("; |
| code += vectortype.struct_def->fixed |
| ? index |
| : "this.bb.__indirect(" + index + ")"; |
| code += ", this.bb)"; |
| } else { |
| if (vectortype.base_type == BASE_TYPE_STRING) { |
| index += ", optionalEncoding"; |
| } |
| code += offset_prefix + GenGetter(vectortype, "(" + index + ")"); |
| } |
| code += " : "; |
| if (field.value.type.element == BASE_TYPE_BOOL) { |
| code += "false"; |
| } else if (field.value.type.element == BASE_TYPE_LONG || |
| field.value.type.element == BASE_TYPE_ULONG) { |
| code += "this.bb.createLong(0, 0)"; |
| } else if (IsScalar(field.value.type.element)) { |
| code += "0"; |
| } else { |
| code += "null"; |
| } |
| code += ";\n"; |
| break; |
| } |
| |
| case BASE_TYPE_UNION: |
| GenDocComment(field.doc_comment, code_ptr, |
| "@param {flatbuffers.Table} obj\n" |
| "@returns {?flatbuffers.Table}"); |
| code += object_name + ".prototype." + MakeCamel(field.name, false); |
| code += " = function(obj) {\n"; |
| code += offset_prefix + GenGetter(field.value.type, |
| "(obj, this.bb_pos + offset)") + " : null;\n"; |
| break; |
| |
| default: |
| assert(0); |
| } |
| } |
| code += "};\n\n"; |
| |
| // Adds the mutable scalar value to the output |
| if (IsScalar(field.value.type.base_type) && parser.opts.mutable_buffer) { |
| std::string annotations = "@param {" + GenTypeName(field.value.type, true) + "} value\n"; |
| GenDocComment(code_ptr, annotations + |
| "@returns {boolean}"); |
| |
| code += object_name + ".prototype.mutate_" + field.name + " = function(value) {\n"; |
| code += " var offset = this.bb.__offset(this.bb_pos, " + NumToString(field.value.offset) + ");\n\n"; |
| code += " if (offset === 0) {\n"; |
| code += " return false;\n"; |
| code += " }\n\n"; |
| code += " this.bb.write" + MakeCamel(GenType(field.value.type)) + "(this.bb_pos + offset, value);\n"; |
| code += " return true;\n"; |
| code += "};\n\n"; |
| } |
| |
| // 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) && !IsLong(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.bytes().byteOffset + this.bb.__vector(this.bb_pos + offset), " |
| "this.bb.__vector_len(this.bb_pos + offset)) : null;\n};\n\n"; |
| } |
| } |
| } |
| |
| // Emit a factory constructor |
| if (struct_def.fixed) { |
| std::string annotations = "@param {flatbuffers.Builder} builder\n"; |
| std::string arguments; |
| GenStructArgs(struct_def, &annotations, &arguments, ""); |
| GenDocComment(code_ptr, annotations + |
| "@returns {flatbuffers.Offset}"); |
| code += object_name + ".create" + struct_def.name + " = function(builder"; |
| code += arguments + ") {\n"; |
| GenStructBody(struct_def, &code, ""); |
| code += " return builder.offset();\n};\n\n"; |
| } else { |
| // Generate a method to start building a new object |
| GenDocComment(code_ptr, |
| "@param {flatbuffers.Builder} builder"); |
| code += object_name + ".start" + struct_def.name; |
| code += " = function(builder) {\n"; |
| code += " builder.startObject(" + NumToString( |
| struct_def.fields.vec.size()) + ");\n"; |
| code += "};\n\n"; |
| |
| // Generate a set of static methods that allow table construction |
| for (auto it = struct_def.fields.vec.begin(); |
| it != struct_def.fields.vec.end(); ++it) { |
| auto &field = **it; |
| if (field.deprecated) continue; |
| auto argname = MakeCamel(field.name, false); |
| if (!IsScalar(field.value.type.base_type)) { |
| argname += "Offset"; |
| } |
| |
| // Generate the field insertion method |
| GenDocComment(code_ptr, |
| "@param {flatbuffers.Builder} builder\n" |
| "@param {" + GenTypeName(field.value.type, true) + "} " + |
| argname); |
| code += object_name + ".add" + MakeCamel(field.name); |
| code += " = function(builder, " + argname + ") {\n"; |
| code += " builder.addField" + GenWriteMethod(field.value.type) + "("; |
| code += NumToString(it - struct_def.fields.vec.begin()) + ", "; |
| if (field.value.type.base_type == BASE_TYPE_BOOL) { |
| code += "+"; |
| } |
| code += argname + ", "; |
| if (!IsScalar(field.value.type.base_type)) { |
| code += "0"; |
| } else { |
| if (field.value.type.base_type == BASE_TYPE_BOOL) { |
| code += "+"; |
| } |
| code += GenDefaultValue(field.value, "builder"); |
| } |
| code += ");\n};\n\n"; |
| |
| if (field.value.type.base_type == BASE_TYPE_VECTOR) { |
| auto vector_type = field.value.type.VectorType(); |
| auto alignment = InlineAlignment(vector_type); |
| auto elem_size = InlineSize(vector_type); |
| |
| // Generate a method to create a vector from a JavaScript array |
| if (!IsStruct(vector_type)) { |
| GenDocComment(code_ptr, |
| "@param {flatbuffers.Builder} builder\n" |
| "@param {Array.<" + GenTypeName(vector_type, true) + |
| ">} data\n" |
| "@returns {flatbuffers.Offset}"); |
| code += object_name + ".create" + MakeCamel(field.name); |
| code += "Vector = function(builder, data) {\n"; |
| code += " builder.startVector(" + NumToString(elem_size); |
| code += ", data.length, " + NumToString(alignment) + ");\n"; |
| code += " for (var i = data.length - 1; i >= 0; i--) {\n"; |
| code += " builder.add" + GenWriteMethod(vector_type) + "("; |
| if (vector_type.base_type == BASE_TYPE_BOOL) { |
| code += "+"; |
| } |
| code += "data[i]);\n"; |
| code += " }\n"; |
| code += " return builder.endVector();\n"; |
| code += "};\n\n"; |
| } |
| |
| // Generate a method to start a vector, data to be added manually after |
| GenDocComment(code_ptr, |
| "@param {flatbuffers.Builder} builder\n" |
| "@param {number} numElems"); |
| code += object_name + ".start" + MakeCamel(field.name); |
| code += "Vector = function(builder, numElems) {\n"; |
| code += " builder.startVector(" + NumToString(elem_size); |
| code += ", numElems, " + NumToString(alignment) + ");\n"; |
| code += "};\n\n"; |
| } |
| } |
| |
| // Generate a method to stop building a new object |
| GenDocComment(code_ptr, |
| "@param {flatbuffers.Builder} builder\n" |
| "@returns {flatbuffers.Offset}"); |
| code += object_name + ".end" + struct_def.name; |
| code += " = function(builder) {\n"; |
| code += " var offset = builder.endObject();\n"; |
| for (auto it = struct_def.fields.vec.begin(); |
| it != struct_def.fields.vec.end(); ++it) { |
| auto &field = **it; |
| if (!field.deprecated && field.required) { |
| code += " builder.requiredField(offset, "; |
| code += NumToString(field.value.offset); |
| code += "); // " + field.name + "\n"; |
| } |
| } |
| code += " return offset;\n"; |
| code += "};\n\n"; |
| |
| // Generate the method to complete buffer construction |
| if (parser_.root_struct_def_ == &struct_def) { |
| GenDocComment(code_ptr, |
| "@param {flatbuffers.Builder} builder\n" |
| "@param {flatbuffers.Offset} offset"); |
| code += object_name + ".finish" + struct_def.name + "Buffer"; |
| code += " = function(builder, offset) {\n"; |
| code += " builder.finish(offset"; |
| if (!parser_.file_identifier_.empty()) { |
| code += ", '" + parser_.file_identifier_ + "'"; |
| } |
| code += ");\n"; |
| code += "};\n\n"; |
| } |
| } |
| } |
| }; |
| } // namespace js |
| |
| bool GenerateJS(const Parser &parser, const std::string &path, |
| const std::string &file_name) { |
| js::JsGenerator generator(parser, path, file_name); |
| return generator.generate(); |
| } |
| |
| std::string JSMakeRule(const Parser &parser, |
| const std::string &path, |
| const std::string &file_name) { |
| std::string filebase = flatbuffers::StripPath( |
| flatbuffers::StripExtension(file_name)); |
| std::string make_rule = GeneratedFileName(path, filebase) + ": "; |
| auto included_files = parser.GetIncludedFilesRecursive(file_name); |
| for (auto it = included_files.begin(); |
| it != included_files.end(); ++it) { |
| make_rule += " " + *it; |
| } |
| return make_rule; |
| } |
| |
| } // namespace flatbuffers |
