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Diffstat (limited to 'xC-gen-proto-js.awk')
| -rw-r--r-- | xC-gen-proto-js.awk | 225 |
1 files changed, 0 insertions, 225 deletions
diff --git a/xC-gen-proto-js.awk b/xC-gen-proto-js.awk deleted file mode 100644 index 40b99ee..0000000 --- a/xC-gen-proto-js.awk +++ /dev/null @@ -1,225 +0,0 @@ -# xC-gen-proto-js.awk: Javascript backend for xC-gen-proto.awk. -# -# Copyright (c) 2022, Přemysl Eric Janouch <p@janouch.name> -# SPDX-License-Identifier: 0BSD -# -# This backend is currently for decoding the binary format only. -# (JSON is way too expensive to process and transfer.) -# -# Import the resulting script as a Javascript module. - -function define_internal(name) { - Types[name] = "internal" -} - -function define_sint(size, shortname) { - shortname = "i" size - define_internal(shortname) - CodegenDeserialize[shortname] = "\t%s = r." shortname "()\n" - - print "" - print "\t" shortname "() {" - if (size == "64") { - # XXX: 2^53 - 1 must be enough for anyone. BigInts are a PITA. - print "\t\tconst " shortname \ - " = Number(this.getBigInt" size "(this.offset))" - } else { - print "\t\tconst " shortname " = this.getInt" size "(this.offset)" - } - print "\t\tthis.offset += " (size / 8) - print "\t\treturn " shortname - print "\t}" -} - -function define_uint(size, shortname) { - shortname = "u" size - define_internal(shortname) - CodegenDeserialize[shortname] = "\t%s = r." shortname "()\n" - - print "" - print "\t" shortname "() {" - if (size == "64") { - # XXX: 2^53 - 1 must be enough for anyone. BigInts are a PITA. - print "\t\tconst " shortname \ - " = Number(this.getBigUint" size "(this.offset))" - } else { - print "\t\tconst " shortname " = this.getUint" size "(this.offset)" - } - print "\t\tthis.offset += " (size / 8) - print "\t\treturn " shortname - print "\t}" -} - -function codegen_begin() { - print "// Code generated from " FILENAME ". DO NOT EDIT." - print "" - print "export class Reader extends DataView {" - print "\tconstructor() {" - print "\t\tsuper(...arguments)" - print "\t\tthis.offset = 0" - print "\t\tthis.decoder = new TextDecoder('utf-8', {fatal: true})" - print "\t}" - print "" - print "\tget empty() {" - print "\t\treturn this.byteLength <= this.offset" - print "\t}" - print "" - print "\trequire(len) {" - print "\t\tif (this.byteLength - this.offset < len)" - print "\t\t\tthrow `Premature end of data`" - print "\t\treturn this.byteOffset + this.offset" - print "\t}" - - define_internal("string") - CodegenDeserialize["string"] = "\t%s = r.string()\n" - - print "" - print "\tstring() {" - print "\t\tconst len = this.getUint32(this.offset)" - print "\t\tthis.offset += 4" - print "\t\tconst array = new Uint8Array(" - print "\t\t\tthis.buffer, this.require(len), len)" - print "\t\tthis.offset += len" - print "\t\treturn this.decoder.decode(array)" - print "\t}" - - define_internal("bool") - CodegenDeserialize["bool"] = "\t%s = r.bool()\n" - - print "" - print "\tbool() {" - print "\t\tconst u8 = this.getUint8(this.offset)" - print "\t\tthis.offset += 1" - print "\t\treturn u8 != 0" - print "\t}" - - define_sint("8") - define_sint("16") - define_sint("32") - define_sint("64") - define_uint("8") - define_uint("16") - define_uint("32") - define_uint("64") - - print "}" -} - -function codegen_constant(name, value) { - print "" - print "export const " decapitalize(snaketocamel(name)) " = " value -} - -function codegen_enum_value(name, subname, value, cg) { - append(cg, "fields", "\t" snaketocamel(subname) ": " value ",\n") -} - -function codegen_enum(name, cg) { - print "" - print "export const " name " = Object.freeze({" - print cg["fields"] "})" - - CodegenDeserialize[name] = "\t%s = r.i8()\n" - for (i in cg) - delete cg[i] -} - -function codegen_struct_field(d, cg, camel, f, deserialize) { - camel = decapitalize(snaketocamel(d["name"])) - f = "s." camel - append(cg, "fields", "\t" camel "\n") - - deserialize = CodegenDeserialize[d["type"]] - if (!d["isarray"]) { - append(cg, "deserialize", sprintf(deserialize, f)) - return - } - - append(cg, "deserialize", - "\t{\n" \ - indent(sprintf(CodegenDeserialize["u32"], "const len"))) - if (d["type"] == "u8") { - append(cg, "deserialize", - "\t\t" f " = new Uint8Array(\n" \ - "\t\t\tr.buffer, r.require(len), len)\n" \ - "\t\tr.offset += len\n" \ - "\t}\n") - return - } - if (d["type"] == "i8") { - append(cg, "deserialize", - "\t\t" f " = new Int8Array(\n" \ - "\t\t\tr.buffer, r.require(len), len)\n" \ - "\t\tr.offset += len\n" \ - "\t}\n") - return - } - - append(cg, "deserialize", - "\t\t" f " = new Array(len)\n" \ - "\t}\n" \ - "\tfor (let i = 0; i < " f ".length; i++)\n" \ - indent(sprintf(deserialize, f "[i]"))) -} - -function codegen_struct_tag(d, cg) { - append(cg, "fields", "\t" decapitalize(snaketocamel(d["name"])) "\n") - # Do not deserialize here, that is already done by the containing union. -} - -function codegen_struct(name, cg) { - print "" - print "export class " name " {" - print cg["fields"] cg["methods"] - print "\tstatic deserialize(r) {" - print "\t\tconst s = new " name "()" - print indent(cg["deserialize"]) "\t\treturn s" - print "\t}" - print "}" - - CodegenDeserialize[name] = "\t%s = " name ".deserialize(r)\n" - for (i in cg) - delete cg[i] -} - -function codegen_union_tag(d, cg) { - cg["tagtype"] = d["type"] - cg["tagname"] = d["name"] -} - -function codegen_union_struct(name, casename, cg, scg, structname) { - append(scg, "methods", - "\n" \ - "\tconstructor() {\n" \ - "\t\tthis." decapitalize(snaketocamel(cg["tagname"])) \ - " = " cg["tagtype"] "." snaketocamel(casename) "\n" \ - "\t}\n") - - # And thus not all generated structs are present in Types. - structname = name snaketocamel(casename) - codegen_struct(structname, scg) - - append(cg, "deserialize", - "\tcase " cg["tagtype"] "." snaketocamel(casename) ":\n" \ - "\t{\n" \ - indent(sprintf(CodegenDeserialize[structname], "const s")) \ - "\t\treturn s\n" \ - "\t}\n") -} - -function codegen_union(name, cg, tagvar) { - tagvar = decapitalize(snaketocamel(cg["tagname"])) - - print "" - print "export function deserialize" name "(r) {" - print sprintf(CodegenDeserialize[cg["tagtype"]], "const " tagvar) \ - "\tswitch (" tagvar ") {" - print cg["deserialize"] "\tdefault:" - print "\t\tthrow `Unknown " cg["tagtype"] " (${tagvar})`" - print "\t}" - print "}" - - CodegenDeserialize[name] = "\t%s = deserialize" name "(r)\n" - for (i in cg) - delete cg[i] -} |