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/******************************************************************************
*
* utf8html.cpp - SWFilter descendant to convert a UTF-8 stream to
* HTML escapes
*
* $Id: utf8html.cpp 2980 2013-09-14 21:51:47Z scribe $
*
* Copyright 2001-2013 CrossWire Bible Society (http://www.crosswire.org)
* CrossWire Bible Society
* P. O. Box 2528
* Tempe, AZ 85280-2528
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation version 2.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
*/
#include <stdlib.h>
#include <stdio.h>
#include <utf8html.h>
#include <swbuf.h>
SWORD_NAMESPACE_START
UTF8HTML::UTF8HTML() {
}
char UTF8HTML::processText(SWBuf &text, const SWKey *key, const SWModule *module)
{
unsigned char *from;
char digit[10];
unsigned long ch;
if ((unsigned long)key < 2) // hack, we're en(1)/de(0)ciphering
return (char)-1;
SWBuf orig = text;
from = (unsigned char *)orig.c_str();
// -------------------------------
for (text = ""; *from; from++) {
ch = 0;
if ((*from & 128) != 128) {
// if (*from != ' ')
text += *from;
continue;
}
if ((*from & 128) && ((*from & 64) != 64)) {
// error
*from = 'x';
continue;
}
*from <<= 1;
int subsequent;
for (subsequent = 1; (*from & 128); subsequent++) {
*from <<= 1;
from[subsequent] &= 63;
ch <<= 6;
ch |= from[subsequent];
}
subsequent--;
*from <<=1;
char significantFirstBits = 8 - (2+subsequent);
ch |= (((short)*from) << (((6*subsequent)+significantFirstBits)-8));
from += subsequent;
text += '&';
text += '#';
sprintf(digit, "%ld", ch);
for (char *dig = digit; *dig; dig++)
text += *dig;
text += ';';
}
return 0;
}
SWORD_NAMESPACE_END
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