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

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

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

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

#ifndef nsPluginManifestLineReader_h_

#define nsPluginManifestLineReader_h_

#include "nspr.h"

#include "nsDebug.h"

#ifdef XP_WIN

#define PLUGIN_REGISTRY_FIELD_DELIMITER '|'

#else

#define PLUGIN_REGISTRY_FIELD_DELIMITER ':'

#endif

#define PLUGIN_REGISTRY_END_OF_LINE_MARKER '$'

class nsPluginManifestLineReader

{

  public:

    nsPluginManifestLineReader()

      : mLength(0)

    {

      mBase = mCur = mNext = mLimit = 0;

    }

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

    char* Init(uint32_t flen)

    {

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

      if (mBase) {

        mLimit = mBase + flen;

        *mLimit = 0;

      }

      mLength = 0;

      return mBase;

    }

    bool NextLine()

    {

      if (mNext >= mLimit)

        return false;

      mCur = mNext;

      mLength = 0;

      char *lastDelimiter = 0;

      while(mNext < mLimit) {

        if (IsEOL(*mNext)) {

          if (lastDelimiter) {

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

              return false;

            *lastDelimiter = '\0';

          } else {

            *mNext = '\0';

          }

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

            if (!IsEOL(*mNext))

              break;

          }

          return true;

        }

        if (*mNext == PLUGIN_REGISTRY_FIELD_DELIMITER)

          lastDelimiter = mNext;

        ++mNext;

        ++mLength;

      }

      return false;

    }

    int ParseLine(char** chunks, int maxChunks)

    {

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

      int found = 0;

      chunks[found++] = mCur;

      if (found < maxChunks) {

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

          if (*cur == PLUGIN_REGISTRY_FIELD_DELIMITER) {

            *cur = 0;

            chunks[found++] = cur + 1;

            if (found == maxChunks)

              break;

          }

        }

      }

      return found;

    }

    char*       LinePtr() { return mCur; }

    uint32_t    LineLength() { return mLength; }

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

    char*       mBase;

  private:

    char*       mCur;

    uint32_t    mLength;

    char*       mNext;

    char*       mLimit;

};

#endif