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website/functions/node_modules/protobufjs/src/parse.js

@@ -0,0 +1,758 @@
+"use strict";
+module.exports = parse;
+
+parse.filename = null;
+parse.defaults = { keepCase: false };
+
+var tokenize  = require("./tokenize"),
+    Root      = require("./root"),
+    Type      = require("./type"),
+    Field     = require("./field"),
+    MapField  = require("./mapfield"),
+    OneOf     = require("./oneof"),
+    Enum      = require("./enum"),
+    Service   = require("./service"),
+    Method    = require("./method"),
+    types     = require("./types"),
+    util      = require("./util");
+
+var base10Re    = /^[1-9][0-9]*$/,
+    base10NegRe = /^-?[1-9][0-9]*$/,
+    base16Re    = /^0[x][0-9a-fA-F]+$/,
+    base16NegRe = /^-?0[x][0-9a-fA-F]+$/,
+    base8Re     = /^0[0-7]+$/,
+    base8NegRe  = /^-?0[0-7]+$/,
+    numberRe    = /^(?![eE])[0-9]*(?:\.[0-9]*)?(?:[eE][+-]?[0-9]+)?$/,
+    nameRe      = /^[a-zA-Z_][a-zA-Z_0-9]*$/,
+    typeRefRe   = /^(?:\.?[a-zA-Z_][a-zA-Z_0-9]*)(?:\.[a-zA-Z_][a-zA-Z_0-9]*)*$/,
+    fqTypeRefRe = /^(?:\.[a-zA-Z_][a-zA-Z_0-9]*)+$/;
+
+/**
+ * Result object returned from {@link parse}.
+ * @interface IParserResult
+ * @property {string|undefined} package Package name, if declared
+ * @property {string[]|undefined} imports Imports, if any
+ * @property {string[]|undefined} weakImports Weak imports, if any
+ * @property {string|undefined} syntax Syntax, if specified (either `"proto2"` or `"proto3"`)
+ * @property {Root} root Populated root instance
+ */
+
+/**
+ * Options modifying the behavior of {@link parse}.
+ * @interface IParseOptions
+ * @property {boolean} [keepCase=false] Keeps field casing instead of converting to camel case
+ * @property {boolean} [alternateCommentMode=false] Recognize double-slash comments in addition to doc-block comments.
+ */
+
+/**
+ * Options modifying the behavior of JSON serialization.
+ * @interface IToJSONOptions
+ * @property {boolean} [keepComments=false] Serializes comments.
+ */
+
+/**
+ * Parses the given .proto source and returns an object with the parsed contents.
+ * @param {string} source Source contents
+ * @param {Root} root Root to populate
+ * @param {IParseOptions} [options] Parse options. Defaults to {@link parse.defaults} when omitted.
+ * @returns {IParserResult} Parser result
+ * @property {string} filename=null Currently processing file name for error reporting, if known
+ * @property {IParseOptions} defaults Default {@link IParseOptions}
+ */
+function parse(source, root, options) {
+    /* eslint-disable callback-return */
+    if (!(root instanceof Root)) {
+        options = root;
+        root = new Root();
+    }
+    if (!options)
+        options = parse.defaults;
+
+    var tn = tokenize(source, options.alternateCommentMode || false),
+        next = tn.next,
+        push = tn.push,
+        peek = tn.peek,
+        skip = tn.skip,
+        cmnt = tn.cmnt;
+
+    var head = true,
+        pkg,
+        imports,
+        weakImports,
+        syntax,
+        isProto3 = false;
+
+    var ptr = root;
+
+    var applyCase = options.keepCase ? function(name) { return name; } : util.camelCase;
+
+    /* istanbul ignore next */
+    function illegal(token, name, insideTryCatch) {
+        var filename = parse.filename;
+        if (!insideTryCatch)
+            parse.filename = null;
+        return Error("illegal " + (name || "token") + " '" + token + "' (" + (filename ? filename + ", " : "") + "line " + tn.line + ")");
+    }
+
+    function readString() {
+        var values = [],
+            token;
+        do {
+            /* istanbul ignore if */
+            if ((token = next()) !== "\"" && token !== "'")
+                throw illegal(token);
+
+            values.push(next());
+            skip(token);
+            token = peek();
+        } while (token === "\"" || token === "'");
+        return values.join("");
+    }
+
+    function readValue(acceptTypeRef) {
+        var token = next();
+        switch (token) {
+            case "'":
+            case "\"":
+                push(token);
+                return readString();
+            case "true": case "TRUE":
+                return true;
+            case "false": case "FALSE":
+                return false;
+        }
+        try {
+            return parseNumber(token, /* insideTryCatch */ true);
+        } catch (e) {
+
+            /* istanbul ignore else */
+            if (acceptTypeRef && typeRefRe.test(token))
+                return token;
+
+            /* istanbul ignore next */
+            throw illegal(token, "value");
+        }
+    }
+
+    function readRanges(target, acceptStrings) {
+        var token, start;
+        do {
+            if (acceptStrings && ((token = peek()) === "\"" || token === "'"))
+                target.push(readString());
+            else
+                target.push([ start = parseId(next()), skip("to", true) ? parseId(next()) : start ]);
+        } while (skip(",", true));
+        skip(";");
+    }
+
+    function parseNumber(token, insideTryCatch) {
+        var sign = 1;
+        if (token.charAt(0) === "-") {
+            sign = -1;
+            token = token.substring(1);
+        }
+        switch (token) {
+            case "inf": case "INF": case "Inf":
+                return sign * Infinity;
+            case "nan": case "NAN": case "Nan": case "NaN":
+                return NaN;
+            case "0":
+                return 0;
+        }
+        if (base10Re.test(token))
+            return sign * parseInt(token, 10);
+        if (base16Re.test(token))
+            return sign * parseInt(token, 16);
+        if (base8Re.test(token))
+            return sign * parseInt(token, 8);
+
+        /* istanbul ignore else */
+        if (numberRe.test(token))
+            return sign * parseFloat(token);
+
+        /* istanbul ignore next */
+        throw illegal(token, "number", insideTryCatch);
+    }
+
+    function parseId(token, acceptNegative) {
+        switch (token) {
+            case "max": case "MAX": case "Max":
+                return 536870911;
+            case "0":
+                return 0;
+        }
+
+        /* istanbul ignore if */
+        if (!acceptNegative && token.charAt(0) === "-")
+            throw illegal(token, "id");
+
+        if (base10NegRe.test(token))
+            return parseInt(token, 10);
+        if (base16NegRe.test(token))
+            return parseInt(token, 16);
+
+        /* istanbul ignore else */
+        if (base8NegRe.test(token))
+            return parseInt(token, 8);
+
+        /* istanbul ignore next */
+        throw illegal(token, "id");
+    }
+
+    function parsePackage() {
+
+        /* istanbul ignore if */
+        if (pkg !== undefined)
+            throw illegal("package");
+
+        pkg = next();
+
+        /* istanbul ignore if */
+        if (!typeRefRe.test(pkg))
+            throw illegal(pkg, "name");
+
+        ptr = ptr.define(pkg);
+        skip(";");
+    }
+
+    function parseImport() {
+        var token = peek();
+        var whichImports;
+        switch (token) {
+            case "weak":
+                whichImports = weakImports || (weakImports = []);
+                next();
+                break;
+            case "public":
+                next();
+                // eslint-disable-line no-fallthrough
+            default:
+                whichImports = imports || (imports = []);
+                break;
+        }
+        token = readString();
+        skip(";");
+        whichImports.push(token);
+    }
+
+    function parseSyntax() {
+        skip("=");
+        syntax = readString();
+        isProto3 = syntax === "proto3";
+
+        /* istanbul ignore if */
+        if (!isProto3 && syntax !== "proto2")
+            throw illegal(syntax, "syntax");
+
+        skip(";");
+    }
+
+    function parseCommon(parent, token) {
+        switch (token) {
+
+            case "option":
+                parseOption(parent, token);
+                skip(";");
+                return true;
+
+            case "message":
+                parseType(parent, token);
+                return true;
+
+            case "enum":
+                parseEnum(parent, token);
+                return true;
+
+            case "service":
+                parseService(parent, token);
+                return true;
+
+            case "extend":
+                parseExtension(parent, token);
+                return true;
+        }
+        return false;
+    }
+
+    function ifBlock(obj, fnIf, fnElse) {
+        var trailingLine = tn.line;
+        if (obj) {
+            obj.comment = cmnt(); // try block-type comment
+            obj.filename = parse.filename;
+        }
+        if (skip("{", true)) {
+            var token;
+            while ((token = next()) !== "}")
+                fnIf(token);
+            skip(";", true);
+        } else {
+            if (fnElse)
+                fnElse();
+            skip(";");
+            if (obj && typeof obj.comment !== "string")
+                obj.comment = cmnt(trailingLine); // try line-type comment if no block
+        }
+    }
+
+    function parseType(parent, token) {
+
+        /* istanbul ignore if */
+        if (!nameRe.test(token = next()))
+            throw illegal(token, "type name");
+
+        var type = new Type(token);
+        ifBlock(type, function parseType_block(token) {
+            if (parseCommon(type, token))
+                return;
+
+            switch (token) {
+
+                case "map":
+                    parseMapField(type, token);
+                    break;
+
+                case "required":
+                case "optional":
+                case "repeated":
+                    parseField(type, token);
+                    break;
+
+                case "oneof":
+                    parseOneOf(type, token);
+                    break;
+
+                case "extensions":
+                    readRanges(type.extensions || (type.extensions = []));
+                    break;
+
+                case "reserved":
+                    readRanges(type.reserved || (type.reserved = []), true);
+                    break;
+
+                default:
+                    /* istanbul ignore if */
+                    if (!isProto3 || !typeRefRe.test(token))
+                        throw illegal(token);
+
+                    push(token);
+                    parseField(type, "optional");
+                    break;
+            }
+        });
+        parent.add(type);
+    }
+
+    function parseField(parent, rule, extend) {
+        var type = next();
+        if (type === "group") {
+            parseGroup(parent, rule);
+            return;
+        }
+
+        /* istanbul ignore if */
+        if (!typeRefRe.test(type))
+            throw illegal(type, "type");
+
+        var name = next();
+
+        /* istanbul ignore if */
+        if (!nameRe.test(name))
+            throw illegal(name, "name");
+
+        name = applyCase(name);
+        skip("=");
+
+        var field = new Field(name, parseId(next()), type, rule, extend);
+        ifBlock(field, function parseField_block(token) {
+
+            /* istanbul ignore else */
+            if (token === "option") {
+                parseOption(field, token);
+                skip(";");
+            } else
+                throw illegal(token);
+
+        }, function parseField_line() {
+            parseInlineOptions(field);
+        });
+        parent.add(field);
+
+        // JSON defaults to packed=true if not set so we have to set packed=false explicity when
+        // parsing proto2 descriptors without the option, where applicable. This must be done for
+        // all known packable types and anything that could be an enum (= is not a basic type).
+        if (!isProto3 && field.repeated && (types.packed[type] !== undefined || types.basic[type] === undefined))
+            field.setOption("packed", false, /* ifNotSet */ true);
+    }
+
+    function parseGroup(parent, rule) {
+        var name = next();
+
+        /* istanbul ignore if */
+        if (!nameRe.test(name))
+            throw illegal(name, "name");
+
+        var fieldName = util.lcFirst(name);
+        if (name === fieldName)
+            name = util.ucFirst(name);
+        skip("=");
+        var id = parseId(next());
+        var type = new Type(name);
+        type.group = true;
+        var field = new Field(fieldName, id, name, rule);
+        field.filename = parse.filename;
+        ifBlock(type, function parseGroup_block(token) {
+            switch (token) {
+
+                case "option":
+                    parseOption(type, token);
+                    skip(";");
+                    break;
+
+                case "required":
+                case "optional":
+                case "repeated":
+                    parseField(type, token);
+                    break;
+
+                /* istanbul ignore next */
+                default:
+                    throw illegal(token); // there are no groups with proto3 semantics
+            }
+        });
+        parent.add(type)
+              .add(field);
+    }
+
+    function parseMapField(parent) {
+        skip("<");
+        var keyType = next();
+
+        /* istanbul ignore if */
+        if (types.mapKey[keyType] === undefined)
+            throw illegal(keyType, "type");
+
+        skip(",");
+        var valueType = next();
+
+        /* istanbul ignore if */
+        if (!typeRefRe.test(valueType))
+            throw illegal(valueType, "type");
+
+        skip(">");
+        var name = next();
+
+        /* istanbul ignore if */
+        if (!nameRe.test(name))
+            throw illegal(name, "name");
+
+        skip("=");
+        var field = new MapField(applyCase(name), parseId(next()), keyType, valueType);
+        ifBlock(field, function parseMapField_block(token) {
+
+            /* istanbul ignore else */
+            if (token === "option") {
+                parseOption(field, token);
+                skip(";");
+            } else
+                throw illegal(token);
+
+        }, function parseMapField_line() {
+            parseInlineOptions(field);
+        });
+        parent.add(field);
+    }
+
+    function parseOneOf(parent, token) {
+
+        /* istanbul ignore if */
+        if (!nameRe.test(token = next()))
+            throw illegal(token, "name");
+
+        var oneof = new OneOf(applyCase(token));
+        ifBlock(oneof, function parseOneOf_block(token) {
+            if (token === "option") {
+                parseOption(oneof, token);
+                skip(";");
+            } else {
+                push(token);
+                parseField(oneof, "optional");
+            }
+        });
+        parent.add(oneof);
+    }
+
+    function parseEnum(parent, token) {
+
+        /* istanbul ignore if */
+        if (!nameRe.test(token = next()))
+            throw illegal(token, "name");
+
+        var enm = new Enum(token);
+        ifBlock(enm, function parseEnum_block(token) {
+          switch(token) {
+            case "option":
+              parseOption(enm, token);
+              skip(";");
+              break;
+
+            case "reserved":
+              readRanges(enm.reserved || (enm.reserved = []), true);
+              break;
+
+            default:
+              parseEnumValue(enm, token);
+          }
+        });
+        parent.add(enm);
+    }
+
+    function parseEnumValue(parent, token) {
+
+        /* istanbul ignore if */
+        if (!nameRe.test(token))
+            throw illegal(token, "name");
+
+        skip("=");
+        var value = parseId(next(), true),
+            dummy = {};
+        ifBlock(dummy, function parseEnumValue_block(token) {
+
+            /* istanbul ignore else */
+            if (token === "option") {
+                parseOption(dummy, token); // skip
+                skip(";");
+            } else
+                throw illegal(token);
+
+        }, function parseEnumValue_line() {
+            parseInlineOptions(dummy); // skip
+        });
+        parent.add(token, value, dummy.comment);
+    }
+
+    function parseOption(parent, token) {
+        var isCustom = skip("(", true);
+
+        /* istanbul ignore if */
+        if (!typeRefRe.test(token = next()))
+            throw illegal(token, "name");
+
+        var name = token;
+        if (isCustom) {
+            skip(")");
+            name = "(" + name + ")";
+            token = peek();
+            if (fqTypeRefRe.test(token)) {
+                name += token;
+                next();
+            }
+        }
+        skip("=");
+        parseOptionValue(parent, name);
+    }
+
+    function parseOptionValue(parent, name) {
+        if (skip("{", true)) { // { a: "foo" b { c: "bar" } }
+            do {
+                /* istanbul ignore if */
+                if (!nameRe.test(token = next()))
+                    throw illegal(token, "name");
+
+                if (peek() === "{")
+                    parseOptionValue(parent, name + "." + token);
+                else {
+                    skip(":");
+                    if (peek() === "{")
+                        parseOptionValue(parent, name + "." + token);
+                    else
+                        setOption(parent, name + "." + token, readValue(true));
+                }
+                skip(",", true);
+            } while (!skip("}", true));
+        } else
+            setOption(parent, name, readValue(true));
+        // Does not enforce a delimiter to be universal
+    }
+
+    function setOption(parent, name, value) {
+        if (parent.setOption)
+            parent.setOption(name, value);
+    }
+
+    function parseInlineOptions(parent) {
+        if (skip("[", true)) {
+            do {
+                parseOption(parent, "option");
+            } while (skip(",", true));
+            skip("]");
+        }
+        return parent;
+    }
+
+    function parseService(parent, token) {
+
+        /* istanbul ignore if */
+        if (!nameRe.test(token = next()))
+            throw illegal(token, "service name");
+
+        var service = new Service(token);
+        ifBlock(service, function parseService_block(token) {
+            if (parseCommon(service, token))
+                return;
+
+            /* istanbul ignore else */
+            if (token === "rpc")
+                parseMethod(service, token);
+            else
+                throw illegal(token);
+        });
+        parent.add(service);
+    }
+
+    function parseMethod(parent, token) {
+        var type = token;
+
+        /* istanbul ignore if */
+        if (!nameRe.test(token = next()))
+            throw illegal(token, "name");
+
+        var name = token,
+            requestType, requestStream,
+            responseType, responseStream;
+
+        skip("(");
+        if (skip("stream", true))
+            requestStream = true;
+
+        /* istanbul ignore if */
+        if (!typeRefRe.test(token = next()))
+            throw illegal(token);
+
+        requestType = token;
+        skip(")"); skip("returns"); skip("(");
+        if (skip("stream", true))
+            responseStream = true;
+
+        /* istanbul ignore if */
+        if (!typeRefRe.test(token = next()))
+            throw illegal(token);
+
+        responseType = token;
+        skip(")");
+
+        var method = new Method(name, type, requestType, responseType, requestStream, responseStream);
+        ifBlock(method, function parseMethod_block(token) {
+
+            /* istanbul ignore else */
+            if (token === "option") {
+                parseOption(method, token);
+                skip(";");
+            } else
+                throw illegal(token);
+
+        });
+        parent.add(method);
+    }
+
+    function parseExtension(parent, token) {
+
+        /* istanbul ignore if */
+        if (!typeRefRe.test(token = next()))
+            throw illegal(token, "reference");
+
+        var reference = token;
+        ifBlock(null, function parseExtension_block(token) {
+            switch (token) {
+
+                case "required":
+                case "repeated":
+                case "optional":
+                    parseField(parent, token, reference);
+                    break;
+
+                default:
+                    /* istanbul ignore if */
+                    if (!isProto3 || !typeRefRe.test(token))
+                        throw illegal(token);
+                    push(token);
+                    parseField(parent, "optional", reference);
+                    break;
+            }
+        });
+    }
+
+    var token;
+    while ((token = next()) !== null) {
+        switch (token) {
+
+            case "package":
+
+                /* istanbul ignore if */
+                if (!head)
+                    throw illegal(token);
+
+                parsePackage();
+                break;
+
+            case "import":
+
+                /* istanbul ignore if */
+                if (!head)
+                    throw illegal(token);
+
+                parseImport();
+                break;
+
+            case "syntax":
+
+                /* istanbul ignore if */
+                if (!head)
+                    throw illegal(token);
+
+                parseSyntax();
+                break;
+
+            case "option":
+
+                /* istanbul ignore if */
+                if (!head)
+                    throw illegal(token);
+
+                parseOption(ptr, token);
+                skip(";");
+                break;
+
+            default:
+
+                /* istanbul ignore else */
+                if (parseCommon(ptr, token)) {
+                    head = false;
+                    continue;
+                }
+
+                /* istanbul ignore next */
+                throw illegal(token);
+        }
+    }
+
+    parse.filename = null;
+    return {
+        "package"     : pkg,
+        "imports"     : imports,
+         weakImports  : weakImports,
+         syntax       : syntax,
+         root         : root
+    };
+}
+
+/**
+ * Parses the given .proto source and returns an object with the parsed contents.
+ * @name parse
+ * @function
+ * @param {string} source Source contents
+ * @param {IParseOptions} [options] Parse options. Defaults to {@link parse.defaults} when omitted.
+ * @returns {IParserResult} Parser result
+ * @property {string} filename=null Currently processing file name for error reporting, if known
+ * @property {IParseOptions} defaults Default {@link IParseOptions}
+ * @variation 2
+ */