mirror of
https://bitbucket.org/smil3y/kdelibs.git
synced 2025-02-24 19:02:48 +00:00
117 lines
3.7 KiB
C++
117 lines
3.7 KiB
C++
/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* -*- C++ -*-
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* Copyright (C) 1998 <developer@mozilla.org>
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*
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be included
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* in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include "nsCharSetProber.h"
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#include <stdlib.h>
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namespace kencodingprober {
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//This filter applies to all scripts which do not use English characters
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bool nsCharSetProber::FilterWithoutEnglishLetters(const char* aBuf, unsigned int aLen, char** newBuf, unsigned int& newLen)
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{
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char *newptr;
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char *prevPtr, *curPtr;
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bool meetMSB = false;
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newptr = *newBuf = (char*)malloc(aLen);
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if (!newptr)
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return false;
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for (curPtr = prevPtr = (char*)aBuf; curPtr < aBuf+aLen; ++curPtr)
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{
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if (*curPtr & 0x80)
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{
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meetMSB = true;
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}
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else if (*curPtr < 'A' || (*curPtr > 'Z' && *curPtr < 'a') || *curPtr > 'z')
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{
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//current char is a symbol, most likely a punctuation. we treat it as segment delimiter
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if (meetMSB && curPtr > prevPtr)
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//this segment contains more than single symbol, and it has upper ASCII, we need to keep it
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{
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while (prevPtr < curPtr) *newptr++ = *prevPtr++;
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prevPtr++;
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*newptr++ = ' ';
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meetMSB = false;
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}
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else //ignore current segment. (either because it is just a symbol or just an English word)
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prevPtr = curPtr+1;
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}
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}
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if (meetMSB && curPtr > prevPtr)
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while (prevPtr < curPtr) *newptr++ = *prevPtr++;
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newLen = newptr - *newBuf;
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return true;
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}
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//This filter applies to all scripts which contain both English characters and upper ASCII characters.
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bool nsCharSetProber::FilterWithEnglishLetters(const char* aBuf, unsigned int aLen, char** newBuf, unsigned int& newLen)
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{
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//do filtering to reduce load to probers
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char *newptr;
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char *prevPtr, *curPtr;
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bool isInTag = false;
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newptr = *newBuf = (char*)malloc(aLen);
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if (!newptr)
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return false;
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for (curPtr = prevPtr = (char*)aBuf; curPtr < aBuf+aLen; ++curPtr)
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{
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if (*curPtr == '>')
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isInTag = false;
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else if (*curPtr == '<')
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isInTag = true;
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if (!(*curPtr & 0x80) &&
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(*curPtr < 'A' || (*curPtr > 'Z' && *curPtr < 'a') || *curPtr > 'z') )
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{
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if (curPtr > prevPtr && !isInTag) // Current segment contains more than just a symbol
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// and it is not inside a tag, keep it.
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{
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while (prevPtr < curPtr) *newptr++ = *prevPtr++;
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prevPtr++;
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*newptr++ = ' ';
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}
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else
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prevPtr = curPtr+1;
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}
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}
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// If the current segment contains more than just a symbol
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// and it is not inside a tag then keep it.
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if (!isInTag)
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while (prevPtr < curPtr)
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*newptr++ = *prevPtr++;
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newLen = newptr - *newBuf;
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return true;
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}
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}
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