The following function I have designed to read a value from a specified
position in a file, convert it from little endian to big endian, and then
return. It uses Host Control APIs.
Here are the first 16 bytes in the file: 6F 00 00 00 00 02 00 00 08 00
00 00 09 02 00 00
Very interestingly, position = 8, the HostFRead() function reads:
00 02 00 00 (Palm OS Simulator /ROM 5.3)
08 00 00 00 (Plam OS Emulator/ ROM 4.2)
Ques: Any idea why?
UInt32 Converter: ReadLongValue (HostFILE *hFile, Int32 position)
{
UInt32 value;
UInt32 numItems;
if (HostFSetPos(hFile, &position) != 0) {
ErrDisplay ("Converter::ReadLongValue(): HostFSetPos() failed!");
return 0;
}
if ((numItems = HostFRead (&value, sizeof (UInt32), 1, hFile)) != 1) {
ErrDisplay ("Converter::ReadLongValue(): HostFRead() failed!");
return 0;
}
return (value << 24) | ((value & 0x0000FF00) << 8) |
((value & 0x00FF0000) >> 8) | (value >> 24);
}
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