зеркало из https://github.com/mozilla/gecko-dev.git
90 строки
2.3 KiB
C++
90 строки
2.3 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef nsManifestLineReader_h__
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#define nsManifestLineReader_h__
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#include "nspr.h"
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#include "nsDebug.h"
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class nsManifestLineReader
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{
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public:
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nsManifestLineReader() : mBase(nullptr) {}
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~nsManifestLineReader() {}
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void Init(char* base, uint32_t flen)
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{
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mBase = mCur = mNext = base;
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mLength = 0;
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mLimit = base + flen;
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}
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bool NextLine()
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{
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if(mNext >= mLimit)
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return false;
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mCur = mNext;
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mLength = 0;
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while(mNext < mLimit)
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{
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if(IsEOL(*mNext))
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{
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*mNext = '\0';
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for(++mNext; mNext < mLimit; ++mNext)
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if(!IsEOL(*mNext))
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break;
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return true;
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}
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++mNext;
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++mLength;
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}
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return false;
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}
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int ParseLine(char** chunks, int* lengths, int maxChunks)
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{
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NS_ASSERTION(mCur && maxChunks && chunks, "bad call to ParseLine");
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int found = 0;
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chunks[found++] = mCur;
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if(found < maxChunks)
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{
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char *lastchunk = mCur;
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int *lastlength = lengths;
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for(char* cur = mCur; *cur; cur++)
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{
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if(*cur == ',')
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{
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*cur = 0;
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// always fill in the previous chunk's length
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*lastlength++ = cur - lastchunk;
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chunks[found++] = lastchunk = cur+1;
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if(found == maxChunks)
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break;
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}
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}
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// crazy pointer math - calculate the length of the final chunk
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*lastlength = (mCur + mLength) - lastchunk;
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}
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return found;
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}
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char* LinePtr() {return mCur;}
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uint32_t LineLength() {return mLength;}
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bool IsEOL(char c) {return c == '\n' || c == '\r';}
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private:
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char* mCur;
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uint32_t mLength;
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char* mNext;
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char* mBase;
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char* mLimit;
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};
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#endif
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