| 1 | /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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| 2 | /* ***** BEGIN LICENSE BLOCK *****
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| 3 | * Version: MPL 1.1/GPL 2.0/LGPL 2.1
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| 4 | *
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| 5 | * The contents of this file are subject to the Mozilla Public License Version
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| 6 | * 1.1 (the "License"); you may not use this file except in compliance with
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| 7 | * the License. You may obtain a copy of the License at
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| 8 | * http://www.mozilla.org/MPL/
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| 9 | *
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| 10 | * Software distributed under the License is distributed on an "AS IS" basis,
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| 11 | * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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| 12 | * for the specific language governing rights and limitations under the
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| 13 | * License.
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| 14 | *
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| 15 | * The Original Code is mozilla.org code.
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| 16 | *
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| 17 | * The Initial Developer of the Original Code is
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| 18 | * Netscape Communications Corporation.
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| 19 | * Portions created by the Initial Developer are Copyright (C) 1998
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| 20 | * the Initial Developer. All Rights Reserved.
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| 21 | *
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| 22 | * Contributor(s):
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| 23 | *
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| 24 | * Alternatively, the contents of this file may be used under the terms of
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| 25 | * either of the GNU General Public License Version 2 or later (the "GPL"),
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| 26 | * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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| 27 | * in which case the provisions of the GPL or the LGPL are applicable instead
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| 28 | * of those above. If you wish to allow use of your version of this file only
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| 29 | * under the terms of either the GPL or the LGPL, and not to allow others to
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| 30 | * use your version of this file under the terms of the MPL, indicate your
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| 31 | * decision by deleting the provisions above and replace them with the notice
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| 32 | * and other provisions required by the GPL or the LGPL. If you do not delete
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| 33 | * the provisions above, a recipient may use your version of this file under
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| 34 | * the terms of any one of the MPL, the GPL or the LGPL.
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| 35 | *
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| 36 | * ***** END LICENSE BLOCK ***** */
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| 37 |
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| 38 | #ifndef nsManifestLineReader_h__
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| 39 | #define nsManifestLineReader_h__
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| 40 |
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| 41 | #include "nspr.h"
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| 42 | #include "nsDebug.h"
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| 43 |
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| 44 | class nsManifestLineReader
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| 45 | {
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| 46 | public:
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| 47 | nsManifestLineReader()
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| 48 | : mCur(nsnull)
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| 49 | , mLength(0)
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| 50 | , mNext(nsnull)
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| 51 | , mBase(nsnull)
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| 52 | , mLimit(nsnull) {}
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| 53 | ~nsManifestLineReader() {}
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| 54 |
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| 55 | void Init(char* base, PRUint32 flen)
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| 56 | {
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| 57 | mBase = mCur = mNext = base;
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| 58 | mLength = 0;
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| 59 | mLimit = base + flen;
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| 60 | }
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| 61 |
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| 62 | PRBool NextLine()
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| 63 | {
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| 64 | if(mNext >= mLimit)
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| 65 | return PR_FALSE;
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| 66 |
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| 67 | mCur = mNext;
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| 68 | mLength = 0;
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| 69 |
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| 70 | while(mNext < mLimit)
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| 71 | {
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| 72 | if(IsEOL(*mNext))
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| 73 | {
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| 74 | *mNext = '\0';
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| 75 | for(++mNext; mNext < mLimit; ++mNext)
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| 76 | if(!IsEOL(*mNext))
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| 77 | break;
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| 78 | return PR_TRUE;
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| 79 | }
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| 80 | ++mNext;
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| 81 | ++mLength;
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| 82 | }
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| 83 | return PR_FALSE;
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| 84 | }
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| 85 |
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| 86 | int ParseLine(char** chunks, int* lengths, int maxChunks)
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| 87 | {
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| 88 | NS_ASSERTION(mCur && maxChunks && chunks, "bad call to ParseLine");
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| 89 | int found = 0;
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| 90 | chunks[found++] = mCur;
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| 91 |
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| 92 | if(found < maxChunks)
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| 93 | {
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| 94 | char *lastchunk = mCur;
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| 95 | int *lastlength = lengths;
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| 96 | for(char* cur = mCur; *cur; cur++)
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| 97 | {
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| 98 | if(*cur == ',')
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| 99 | {
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| 100 | *cur = 0;
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| 101 | // always fill in the previous chunk's length
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| 102 | *lastlength++ = cur - lastchunk;
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| 103 | chunks[found++] = lastchunk = cur+1;
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| 104 | if(found == maxChunks)
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| 105 | break;
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| 106 | }
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| 107 | }
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| 108 | // crazy pointer math - calculate the length of the final chunk
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| 109 | *lastlength = (mCur + mLength) - lastchunk;
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| 110 | }
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| 111 | return found;
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| 112 | }
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| 113 |
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| 114 | char* LinePtr() {return mCur;}
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| 115 | PRUint32 LineLength() {return mLength;}
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| 116 |
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| 117 | PRBool IsEOL(char c) {return c == '\n' || c == '\r';}
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| 118 | private:
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| 119 | char* mCur;
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| 120 | PRUint32 mLength;
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| 121 | char* mNext;
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| 122 | char* mBase;
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| 123 | char* mLimit;
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| 124 | };
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| 125 |
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| 126 | #endif
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