@teradataprebuilt/fastcall-linux-node-v59/lib/rex.js

fastcall - Very fast, asynchronous, dyncall based foreign function interface library for Node.js

/*
Copyright 2016 Gábor Mező (gabor.mezo@outlook.com)

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.
*/

'use strict';
const verify = require('./verify');
const a = verify.a;
const ert = verify.ert;
const _ = require('lodash');

const TYPE_AND_LEN = /^\s*([\w_][\w\d_]*)\s*(?:\[\s*(\d+)\s*\])?\s*$/;

exports.matchType = function (str) {
    a&&ert(_.isString(str));

    const match = TYPE_AND_LEN.exec(str);
    if (!match) {
        return null;
    }
    return {
        name: match[1],
        length: match[2] || null
    };
};

const FUNC = /^\s*([\w_][\w\d_]*\s*\**)\s*((?:\s*\(\s*\*\s*)?([\w_][\w\d_]*)(?:\s*\)\s*)?)\s*\((.*)\)\s*$/;

exports.matchFunction = function (str) {
    a&&ert(_.isString(str));

    const match = FUNC.exec(str);
    if (match && match.length === 5) {
        const resultType = match[1];
        const isCallback = match[2].indexOf('*') >= 0;
        const name = match[3].trim();
        let args = match[4].trim();
        args = args ? args.split(',') : [];
        return {
            name,
            isCallback,
            args,
            resultType
        };
    }
    return null;
};

const BEGIN_FIELDS = '^\\s*';
const END_FIELDS = '\\s*([\\w_][\\w\\d_]*)\\s*{(.*)}\s*$';

exports.matchFields = function (keyword, str) {
    a&&ert(_.isString(keyword));
    a&&ert(_.isString(str));

    const regExp = new RegExp(BEGIN_FIELDS + keyword + END_FIELDS);
    const match = regExp.exec(str);
    if (match && match.length === 3) {
        const name = match[1];
        const content = match[2];
        const parts = content.split(';');
        return { name, parts };
    }
    return null;
};

const ARRAY_DECL = /^\s*([\w_][\w\d_]*[\s\*]*)\s*\[\s*(\d*)\s*\]\s*([\w_][\w\d_]*)\s*$/;

exports.matchArrayDeclaration = function (str) {
    a&&ert(_.isString(str));

    const match = ARRAY_DECL.exec(str);
    if (match && match.length === 4) {
        return {
            name: match[3],
            length: Number(match[2]),
            defBody: match[1]
        };
    }
    return null;
};

const TYPE = /(([\w_][\w\d_]*)\s*(?:\[\s*(\d+)\s*\])?)([\s\*]*)/;

exports.matchType = function (str) {
    a&&ert(_.isString(str));

    const match = TYPE.exec(str);
    if (match && match.length === 5) {
        return {
            name: match[2],
            length: match[3],
            stars: match[4]
        };
    }
    return null;
};