97 lines
2.6 KiB
C#
97 lines
2.6 KiB
C#
/*
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* Copyright (c) 2016 Thomas Pornin <pornin@bolet.org>
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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using System;
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using System.Collections.Generic;
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class WordData : Word {
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ConstData blob;
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string baseBlobName;
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int offset;
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bool ongoingResolution;
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internal WordData(T0Comp owner, string name,
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ConstData blob, int offset)
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: base(owner, name)
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{
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this.blob = blob;
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this.offset = offset;
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StackEffect = new SType(0, 1);
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}
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internal WordData(T0Comp owner, string name,
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string baseBlobName, int offset)
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: base(owner, name)
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{
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this.baseBlobName = baseBlobName;
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this.offset = offset;
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StackEffect = new SType(0, 1);
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}
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internal override void Resolve()
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{
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if (blob != null) {
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return;
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}
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if (ongoingResolution) {
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throw new Exception(String.Format(
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"circular reference in blobs ({0})", Name));
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}
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ongoingResolution = true;
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WordData wd = TC.Lookup(baseBlobName) as WordData;
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if (wd == null) {
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throw new Exception(String.Format(
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"data word '{0}' based on non-data word '{1}'",
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Name, baseBlobName));
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}
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wd.Resolve();
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blob = wd.blob;
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offset += wd.offset;
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ongoingResolution = false;
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}
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internal override void Run(CPU cpu)
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{
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Resolve();
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cpu.Push(new TValue(offset, new TPointerBlob(blob)));
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}
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internal override List<ConstData> GetDataBlocks()
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{
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Resolve();
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List<ConstData> r = new List<ConstData>();
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r.Add(blob);
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return r;
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}
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internal override void GenerateCodeElements(List<CodeElement> dst)
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{
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Resolve();
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dst.Add(new CodeElementUInt(0));
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dst.Add(new CodeElementUIntInt(1, blob.Address + offset));
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dst.Add(new CodeElementUInt(0));
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}
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}
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