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//
// TextConverter.cpp
//
// Library: Foundation
// Package: Text
// Module: TextConverter
//
// Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH.
// and Contributors.
//
// SPDX-License-Identifier: BSL-1.0
//
#include "Poco/TextConverter.h"
#include "Poco/TextIterator.h"
#include "Poco/TextEncoding.h"
namespace {
int nullTransform(int ch)
{
return ch;
}
}
namespace Poco {
TextConverter::TextConverter(const TextEncoding& inEncoding, const TextEncoding& outEncoding, int defaultChar):
_inEncoding(inEncoding),
_outEncoding(outEncoding),
_defaultChar(defaultChar)
{
}
TextConverter::~TextConverter()
{
}
int TextConverter::convert(const std::string& source, std::string& destination, Transform trans)
{
int errors = 0;
TextIterator it(source, _inEncoding);
TextIterator end(source);
unsigned char buffer[TextEncoding::MAX_SEQUENCE_LENGTH];
while (it != end)
{
int c = *it;
if (c == -1) { ++errors; c = _defaultChar; }
c = trans(c);
int n = _outEncoding.convert(c, buffer, sizeof(buffer));
if (n == 0) n = _outEncoding.convert(_defaultChar, buffer, sizeof(buffer));
poco_assert (n <= sizeof(buffer));
destination.append((const char*) buffer, n);
++it;
}
return errors;
}
int TextConverter::convert(const void* source, int length, std::string& destination, Transform trans)
{
poco_check_ptr (source);
int errors = 0;
const unsigned char* it = (const unsigned char*) source;
const unsigned char* end = (const unsigned char*) source + length;
unsigned char buffer[TextEncoding::MAX_SEQUENCE_LENGTH];
while (it < end)
{
int n = _inEncoding.queryConvert(it, 1);
int uc;
int read = 1;
while (-1 > n && (end - it) >= -n)
{
read = -n;
n = _inEncoding.queryConvert(it, read);
}
if (-1 > n)
{
it = end;
}
else
{
it += read;
}
if (-1 >= n)
{
uc = _defaultChar;
++errors;
}
else
{
uc = n;
}
uc = trans(uc);
n = _outEncoding.convert(uc, buffer, sizeof(buffer));
if (n == 0) n = _outEncoding.convert(_defaultChar, buffer, sizeof(buffer));
poco_assert (n <= sizeof(buffer));
destination.append((const char*) buffer, n);
}
return errors;
}
int TextConverter::convert(const std::string& source, std::string& destination)
{
return convert(source, destination, nullTransform);
}
int TextConverter::convert(const void* source, int length, std::string& destination)
{
return convert(source, length, destination, nullTransform);
}
} // namespace Poco
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