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// Copyright (c) 2017, Patrick Quist
// 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.
"use strict";
const SymbolStore = require("./symbol-store").SymbolStore;
class PascalDemangler {
constructor() {
this.symbolStore = new SymbolStore();
this.fixedsymbols = {};
this.ignoredsymbols = [];
this.initBasicSymbols();
}
initBasicSymbols() {
this.fixedsymbols.OUTPUT_$$_init = 'unit_initialization';
this.fixedsymbols.OUTPUT_$$_finalize = 'unit_finalization';
this.fixedsymbols.OUTPUT_$$_init_implicit = 'unit_initialization_implicit';
this.fixedsymbols.OUTPUT_$$_finalize_implicit = 'unit_finalization_implicit';
this.fixedsymbols.OUTPUT_init = 'unit_initialization';
this.fixedsymbols.OUTPUT_finalize = 'unit_finalization';
this.fixedsymbols.OUTPUT_init_implicit = 'unit_initialization_implicit';
this.fixedsymbols.OUTPUT_finalize_implicit = 'unit_finalization_implicit';
this.ignoredsymbols = [
".L",
"VMT_$", "INIT_$", "INIT$_$", "FINALIZE$_$", "RTTI_$",
"VMT_OUTPUT_", "INIT$_OUTPUT", "RTTI_OUTPUT_", "FINALIZE$_OUTPUT",
"_$",
"DEBUGSTART_$", "DEBUGEND_$", "DBG_$", "DBG2_$", "DBGREF_$",
"DEBUGSTART_OUTPUT", "DEBUGEND_OUTPUT", "DBG_OUTPUT_", "DBG2_OUTPUT_", "DBGREF_OUTPUT_"
];
}
shouldIgnoreSymbol(text) {
for (let k in this.ignoredsymbols) {
if (text.startsWith(this.ignoredsymbols[k])) {
return true;
}
}
return false;
}
composeReadableMethodSignature(unitname, classname, methodname, params) {
let signature = "";
if (classname !== "") signature = classname.toLowerCase() + ".";
signature = signature + methodname.toLowerCase();
signature = signature + "(" + params.toLowerCase() + ")";
return signature;
}
demangle(text) {
if (!text.endsWith(':')) return false;
if (this.shouldIgnoreSymbol(text)) {
return false;
}
text = text.substr(0, text.length - 1);
for (let k in this.fixedsymbols) {
if (text === k) {
text = text.replace(k, this.fixedsymbols[k]);
this.symbolStore.Add(k, this.fixedsymbols[k]);
return this.fixedsymbols[k];
}
}
let unmangledGlobalVar;
if (text.startsWith("U_$OUTPUT_$$_")) {
unmangledGlobalVar = text.substr(13).toLowerCase();
this.symbolStore.Add(text, unmangledGlobalVar);
return unmangledGlobalVar;
} else if (text.startsWith("U_OUTPUT_")) {
unmangledGlobalVar = text.substr(9).toLowerCase();
this.symbolStore.Add(text, unmangledGlobalVar);
return unmangledGlobalVar;
}
let idx, paramtype = "", signature = "", phase = 0;
let unitname = "", classname = "", methodname = "", params = "", resulttype = "";
idx = text.indexOf("$_$");
if (idx !== -1) {
unitname = text.substr(0, idx - 1);
classname = text.substr(idx + 3, text.indexOf("_$_", idx + 2) - idx - 3);
}
signature = "";
idx = text.indexOf("_$$_");
if (idx !== -1) {
if (unitname === "") unitname = text.substr(0, idx - 1);
signature = text.substr(idx + 3);
}
if (unitname === "") {
idx = text.indexOf("OUTPUT_");
if (idx !== -1) {
unitname = "OUTPUT";
idx = text.indexOf("_$__");
if (idx !== -1) {
classname = text.substr(7, idx - 7);
signature = text.substr(idx + 3);
} else {
signature = text.substr(6);
}
}
}
if (signature !== "") {
for (idx = 1; idx < signature.length; idx++) {
if (signature[idx] === '$') {
if (phase === 0) phase = 1;
else if (phase === 1) {
if (paramtype === "") phase = 2;
else if (params !== "") {
params = params + "," + paramtype;
paramtype = "";
} else if (params === "") {
params = paramtype;
paramtype = "";
}
}
} else {
if (phase === 0) methodname = methodname + signature[idx];
else if (phase === 1) paramtype = paramtype + signature[idx];
else if (phase === 2) resulttype = resulttype + signature[idx];
}
}
if (paramtype !== "") {
if (params !== "") params = params + "," + paramtype;
else params = paramtype;
}
}
const unmangled = this.composeReadableMethodSignature(unitname, classname, methodname, params);
this.symbolStore.Add(text, unmangled);
return unmangled;
}
addDemangleToCache(text) {
this.demangle(text);
}
demangleIfNeeded(text) {
if (text.includes('$')) {
if (this.shouldIgnoreSymbol(text)) {
return text;
}
const translations = this.symbolStore.ListTranslations();
for (let idx in translations) {
text = text.replace(translations[idx][0], translations[idx][1]);
}
return text;
} else {
return text;
}
}
}
exports.demangler = PascalDemangler;