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// Copyright (c) 2012-2018, Matt Godbolt
//
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// * Redistributions of source code must retain the above copyright notice,
// this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
// POSSIBILITY OF SUCH DAMAGE.
const asmDocs = require('./asm-docs'),
props = require('../properties');
class Handler {
constructor() {
const asmProps = props.propsFor("asm-docs");
this.staticMaxAgeSecs = asmProps('staticMaxAgeSecs', 10);
this.atAndTSuffixRemover = /^([A-Z]+)[BWLQ]$/i;
}
handle(req, res, next) {
let info = asmDocs.getAsmOpcode(req.params.opcode);
if (!info) {
// If the opcode ends with an AT&T suffix, try removing that and giving it another go.
// Ideally, we'd be smarter here, but this is a quick win.
const suffixRemoved = this.atAndTSuffixRemover.exec(req.params.opcode);
if (suffixRemoved) {
info = asmDocs.getAsmOpcode(suffixRemoved[1]);
}
}
if (this.staticMaxAgeSecs) {
res.setHeader('Cache-Control', 'public, max-age=' + this.staticMaxAgeSecs);
}
if (req.accepts(['text', 'json']) == 'json') {
res.set('Content-Type', 'application/json');
res.end(JSON.stringify({found: !!info, result: info}));
} else {
res.set('Content-Type', 'text/html');
if (info)
res.end(info.html);
else
res.end("Unknown opcode");
}
}
}
module.exports.Handler = Handler;