static int ReadFromFile(FILE *fd, String buffer,
String *startPos, String *endPos)
{
int num_read=0;
int chars_to_read;
long available=0;
available = numChars(fileno(fd));
chars_to_read = MIN(MAX_LONG_MESSAGE - (*endPos - *startPos),
available);
if (chars_to_read > 0) {
num_read = read(fileno(fd), *endPos, chars_to_read);
*endPos += num_read;
}
return(num_read);
}
void CMTPTypeString::ConstructL(const TDesC& aString)
{
if (aString.Length() > KMTPMaxStringCharactersLength)
{
User::Leave(KErrArgument);
}
// Allocate string storage.
TUint numChars(aString.Length());
if (numChars)
{
numChars += KMTPNullCharLen;
}
ReAllocBufferL(numChars);
// Append the String Characters.
if (numChars > 0)
{
iStringChars.Copy(aString);
}
}
void CMTPTypeString::ReAllocBufferL(TUint aNumNullTerminatedChars)
{
if (aNumNullTerminatedChars > KMTPMaxStringLength)
{
User::Leave(KErrOverflow);
}
// Delete the current buffer
iBuffer.Close();
iStringChars.Set(NULL, 0, 0);
// Allocate a new buffer.
if (aNumNullTerminatedChars > 0)
{
/*
Allocate storage for both the NumChars and String Characters fields. A single
alignment byte is pre-pended to force String Characters to be 16-bit aligned.
*/
iBuffer.CreateMaxL(KMTPAlignmentSize + KMTPNumCharsSize + (aNumNullTerminatedChars * KMTPCharSize));
// Insert the terminating NULL character.
TUint numChars(aNumNullTerminatedChars - KMTPNullCharLen);
memcpy(&iBuffer[KMTPStringCharactersOffset + (numChars * KMTPCharSize)], &KMTPNullChar, KMTPCharSize);
// Set the String Characters pointer.
iStringChars.Set(reinterpret_cast<TUint16*>(&iBuffer[KMTPStringCharactersOffset]), numChars, numChars);
}
else
{
/*
Allocate storage for the NumChars field only. A single alignment byte
is pre-pended to force String Characters to be 16-bit aligned.
*/
iBuffer.CreateMaxL(KMTPNumCharsSize + KMTPAlignmentSize);
}
// Insert the NumChars value
iBuffer[KMTPNumCharsOffset] = aNumNullTerminatedChars;
}
