1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/xpcom/ds/nsManifestLineReader.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,89 @@
1.4 +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
1.5 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.6 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.7 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.8 +
1.9 +#ifndef nsManifestLineReader_h__
1.10 +#define nsManifestLineReader_h__
1.11 +
1.12 +#include "nspr.h"
1.13 +#include "nsDebug.h"
1.14 +
1.15 +class nsManifestLineReader
1.16 +{
1.17 +public:
1.18 + nsManifestLineReader() : mBase(nullptr) {}
1.19 + ~nsManifestLineReader() {}
1.20 +
1.21 + void Init(char* base, uint32_t flen)
1.22 + {
1.23 + mBase = mCur = mNext = base;
1.24 + mLength = 0;
1.25 + mLimit = base + flen;
1.26 + }
1.27 +
1.28 + bool NextLine()
1.29 + {
1.30 + if(mNext >= mLimit)
1.31 + return false;
1.32 +
1.33 + mCur = mNext;
1.34 + mLength = 0;
1.35 +
1.36 + while(mNext < mLimit)
1.37 + {
1.38 + if(IsEOL(*mNext))
1.39 + {
1.40 + *mNext = '\0';
1.41 + for(++mNext; mNext < mLimit; ++mNext)
1.42 + if(!IsEOL(*mNext))
1.43 + break;
1.44 + return true;
1.45 + }
1.46 + ++mNext;
1.47 + ++mLength;
1.48 + }
1.49 + return false;
1.50 + }
1.51 +
1.52 + int ParseLine(char** chunks, int* lengths, int maxChunks)
1.53 + {
1.54 + NS_ASSERTION(mCur && maxChunks && chunks, "bad call to ParseLine");
1.55 + int found = 0;
1.56 + chunks[found++] = mCur;
1.57 +
1.58 + if(found < maxChunks)
1.59 + {
1.60 + char *lastchunk = mCur;
1.61 + int *lastlength = lengths;
1.62 + for(char* cur = mCur; *cur; cur++)
1.63 + {
1.64 + if(*cur == ',')
1.65 + {
1.66 + *cur = 0;
1.67 + // always fill in the previous chunk's length
1.68 + *lastlength++ = cur - lastchunk;
1.69 + chunks[found++] = lastchunk = cur+1;
1.70 + if(found == maxChunks)
1.71 + break;
1.72 + }
1.73 + }
1.74 + // crazy pointer math - calculate the length of the final chunk
1.75 + *lastlength = (mCur + mLength) - lastchunk;
1.76 + }
1.77 + return found;
1.78 + }
1.79 +
1.80 + char* LinePtr() {return mCur;}
1.81 + uint32_t LineLength() {return mLength;}
1.82 +
1.83 + bool IsEOL(char c) {return c == '\n' || c == '\r';}
1.84 +private:
1.85 + char* mCur;
1.86 + uint32_t mLength;
1.87 + char* mNext;
1.88 + char* mBase;
1.89 + char* mLimit;
1.90 +};
1.91 +
1.92 +#endif
