/*! \reimp */
QString QTsciiCodec::toUnicode(const char* chars, int len) const
{
QString result;
for (int i = 0; i < len; i++) {
uchar ch = chars[i];
if ( ch < 0x80 ) {
// ASCII
result += QChar(ch);
} else if ( IsTSCIIChar(ch) ) {
// TSCII
uint s[3];
uint u = qt_TSCIIToUnicode(ch, s);
uint *p = s;
while ( u-- ) {
uint c = *p++;
result += QValidChar(c);
}
} else {
// Invalid
result += QChar::replacement;
}
}
return result;
}
/*!
Converts the first \a len characters in \a chars from this encoding
to Unicode, and returns the result in a QString. The \a state contains
some conversion flags, and is used by the codec to maintain state
information.
*/
QString QTsciiCodec::convertToUnicode(const char* chars, int len, ConverterState *state)
{
ushort replacement = QChar::ReplacementCharacter;
if (state) {
if (state->flags & ConvertInvalidToNull)
replacement = QChar::Null;
}
int invalid = 0;
QString result;
result.resize((len<<1)+len+1);
ushort* cursor = result.data();
for (int i = 0; i < len; i++) {
uchar ch = chars[i];
if (ch < 0x80) {
// ASCII
*cursor++ = ushort(ch);
} else if (IsTSCIIChar(ch)) {
// TSCII
uint s[3];
uint u = qt_TSCIIToUnicode(ch, s);
uint *p = s;
while (u--) {
uint c = *p++;
if (c)
*cursor++ = ushort(c);
else {
*cursor++ = replacement;
++invalid;
}
}
} else {
// Invalid
*cursor++ = replacement;
++invalid;
}
}
result.resize(cursor - result.constData());
if (state) {
state->invalidChars += invalid;
}
return result;
}
/*!
Converts the first \a len characters in \a chars from this encoding
to Unicode, and returns the result in a QString. The \a state contains
some conversion flags, and is used by the codec to maintain state
information.
*/
QString QTsciiCodec::convertToUnicode(const char* chars, int len, ConverterState *state) const
{
QChar replacement = QChar::ReplacementCharacter;
if (state) {
if (state->flags & ConvertInvalidToNull)
replacement = QChar::Null;
}
int invalid = 0;
QString result;
for (int i = 0; i < len; i++) {
uchar ch = chars[i];
if (ch < 0x80) {
// ASCII
result += QLatin1Char(ch);
} else if (IsTSCIIChar(ch)) {
// TSCII
uint s[3];
uint u = qt_TSCIIToUnicode(ch, s);
uint *p = s;
while (u--) {
uint c = *p++;
if (c)
result += QChar(c);
else {
result += replacement;
++invalid;
}
}
} else {
// Invalid
result += replacement;
++invalid;
}
}
if (state) {
state->invalidChars += invalid;
}
return result;
}
/*! \reimp */
int QTsciiCodec::heuristicContentMatch(const char* chars, int len) const
{
int score = 0;
for (int i=0; i<len; i++) {
uchar ch = chars[i];
// No nulls allowed.
if ( !ch )
return -1;
if ( ch < 32 && ch != '\t' && ch != '\n' && ch != '\r' ) {
// Suspicious
if ( score )
score--;
} else if ( ch < 0x80 ) {
// Inconclusive
} else if ( IsTSCIIChar(ch) ) {
score++;
} else {
// Invalid
return -1;
}
}
return score;
}
