The Tor Browser: dom/plugins/base/nsPluginManifestLineReader.h@b8a032363ba2

Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6

     1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

     2 /* This Source Code Form is subject to the terms of the Mozilla Public

     3  * License, v. 2.0. If a copy of the MPL was not distributed with this

     4  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

     6 #ifndef nsPluginManifestLineReader_h_

     7 #define nsPluginManifestLineReader_h_

     9 #include "nspr.h"

    10 #include "nsDebug.h"

    12 #ifdef XP_WIN

    13 #define PLUGIN_REGISTRY_FIELD_DELIMITER '|'

    14 #else

    15 #define PLUGIN_REGISTRY_FIELD_DELIMITER ':'

    16 #endif

    18 #define PLUGIN_REGISTRY_END_OF_LINE_MARKER '$'

    20 class nsPluginManifestLineReader

    21 {

    22   public:

    23     nsPluginManifestLineReader() {mBase = mCur = mNext = mLimit = 0;}

    24     ~nsPluginManifestLineReader() { if (mBase) delete[] mBase; mBase=0;}

    26     char* Init(uint32_t flen)

    27     {

    28       mBase = mCur = mNext = new char[flen + 1];

    29       if (mBase) {

    30         mLimit = mBase + flen;

    31         *mLimit = 0;

    32       }

    33       mLength = 0;

    34       return mBase;

    35     }

    37     bool NextLine()

    38     {

    39       if (mNext >= mLimit)

    40         return false;

    42       mCur = mNext;

    43       mLength = 0;

    45       char *lastDelimiter = 0;

    46       while(mNext < mLimit) {

    47         if (IsEOL(*mNext)) {

    48           if (lastDelimiter) {

    49             if (lastDelimiter && *(mNext - 1) != PLUGIN_REGISTRY_END_OF_LINE_MARKER)

    50               return false;

    51             *lastDelimiter = '\0';

    52           } else {

    53             *mNext = '\0';

    54           }

    56           for (++mNext; mNext < mLimit; ++mNext) {

    57             if (!IsEOL(*mNext))

    58               break;

    59           }

    60           return true;

    61         }

    62         if (*mNext == PLUGIN_REGISTRY_FIELD_DELIMITER)

    63           lastDelimiter = mNext;

    64         ++mNext;

    65         ++mLength;

    66       }

    67       return false;

    68     }

    70     int ParseLine(char** chunks, int maxChunks)

    71     {

    72       NS_ASSERTION(mCur && maxChunks && chunks, "bad call to ParseLine");

    73       int found = 0;

    74       chunks[found++] = mCur;

    76       if (found < maxChunks) {

    77         for (char* cur = mCur; *cur; cur++) {

    78           if (*cur == PLUGIN_REGISTRY_FIELD_DELIMITER) {

    79             *cur = 0;

    80             chunks[found++] = cur + 1;

    81             if (found == maxChunks)

    82               break;

    83           }

    84         }

    85       }

    86       return found;

    87     }

    89     char*       LinePtr() { return mCur; }

    90     uint32_t    LineLength() { return mLength; }

    92     bool        IsEOL(char c) {return c == '\n' || c == '\r';}

    94     char*       mBase;

    95   private:

    96     char*       mCur;

    97     uint32_t    mLength;

    98     char*       mNext;

    99     char*       mLimit;

   100 };

   102 #endif

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