зеркало из https://github.com/mozilla/gecko-dev.git
148 строки
4.6 KiB
C++
148 строки
4.6 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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*
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* The contents of this file are subject to the Netscape Public
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* License Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.mozilla.org/NPL/
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*
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* Software distributed under the License is distributed on an "AS
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* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express oqr
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* implied. See the License for the specific language governing
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* rights and limitations under the License.
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*
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* The Original Code is the JavaScript 2 Prototype.
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*
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* The Initial Developer of the Original Code is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All
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* Rights Reserved.
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*
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* Contributor(s):
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*
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* Alternatively, the contents of this file may be used under the
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* terms of the GNU Public License (the "GPL"), in which case the
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* provisions of the GPL are applicable instead of those above.
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* If you wish to allow use of your version of this file only
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* under the terms of the GPL and not to allow others to use your
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* version of this file under the NPL, indicate your decision by
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* deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL. If you do not delete
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* the provisions above, a recipient may use your version of this
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* file under either the NPL or the GPL.
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*/
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#include <assert.h>
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#include "world.h"
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#include "parser.h"
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#include "reader.h"
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using namespace JavaScript;
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World world;
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const bool showTokens = false;
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const String consoleName = widenCString("<console>");
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#if defined(XP_MAC) && !defined(XP_MAC_MPW)
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#include <SIOUX.h>
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#include <MacTypes.h>
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static char *mac_argv[] = {"js2", 0};
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static void initConsole(StringPtr consoleName, const char* startupMessage,
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int &argc, char **&argv)
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{
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SIOUXSettings.autocloseonquit = false;
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SIOUXSettings.asktosaveonclose = false;
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SIOUXSetTitle(consoleName);
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// Set up a buffer for stderr (otherwise it's a pig).
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static char buffer[BUFSIZ];
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setvbuf(stderr, buffer, _IOLBF, BUFSIZ);
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JavaScript::stdOut << startupMessage;
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argc = 1;
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argv = mac_argv;
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}
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#endif
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// Interactively read a line from the input stream in and put it into
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// s. Return false if reached the end of input before reading anything.
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static bool promptLine(LineReader &inReader, string &s, const char *prompt)
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{
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#if !defined XP_MAC_MPW
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if (prompt)
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stdOut << prompt;
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#endif
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return inReader.readLine(s) != 0;
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}
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static void readEvalPrint(FILE *in, World &world)
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{
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String buffer;
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string line;
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LineReader inReader(in);
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while (promptLine(inReader, line, buffer.empty() ? "js parser> " : "> ")) {
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appendChars(buffer, line.data(), line.size());
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try {
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Arena a;
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Parser p(world, a, buffer, consoleName);
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if (showTokens) {
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Lexer &l = p.lexer;
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while (true) {
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const Token &t = l.get(true);
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if (t.hasKind(Token::end))
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break;
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stdOut << ' ';
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t.print(stdOut, true);
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}
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stdOut << '\n';
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} else {
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StmtNode *parsedStatements = p.parseProgram();
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ASSERT(p.lexer.peek(true).hasKind(Token::end));
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{
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PrettyPrinter f(stdOut, 30);
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{
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PrettyPrinter::Block b(f, 2);
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f << "Program =";
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f.linearBreak(1);
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StmtNode::printStatements(f, parsedStatements);
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}
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f.end();
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}
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stdOut << '\n';
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}
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clear(buffer);
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} catch (Exception &e) {
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/* If we got a syntax error on the end of input,
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* then wait for a continuation
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* of input rather than printing the error message. */
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if (!(e.hasKind(Exception::syntaxError) &&
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e.lineNum && e.pos == buffer.size() &&
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e.sourceFile == consoleName)) {
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stdOut << '\n' << e.fullMessage();
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clear(buffer);
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}
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}
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}
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stdOut << '\n';
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}
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#if defined(XP_MAC) && !defined(XP_MAC_MPW)
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int main(int argc, char **argv)
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{
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initConsole("\pJavaScript Shell", "Welcome to the js2 shell.\n", argc, argv);
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#else
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int main(int , char **)
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{
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#endif
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readEvalPrint(stdin, world);
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return 0;
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// return ProcessArgs(argv + 1, argc - 1);
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}
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