BytesInputStream.cpp

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#include <string.h>     // memcpy
#include <dcl/BytesInputStream.h>
#include <dcl/size_t.h>
 
#if __DCL_HAVE_ALLOC_DEBUG
#undef __DCL_ALLOC_LEVEL
#define __DCL_ALLOC_LEVEL   __DCL_ALLOC_INTERNAL
#endif
 
#if __DCL_HAVE_THIS_FILE__
#undef __THIS_FILE__
static const char_t __THIS_FILE__[] = __T("dcl/BytesInputStream.cpp");
#endif
 
__DCL_BEGIN_NAMESPACE
 
IMPLEMENT_CLASSINFO(BytesInputStream, InputStream)
 
String BytesInputStream::toString() const
{
    StringBuilder r = className();
    r.format(__T("(%ubytes)"), __str.length());
    return r;
}
 
BytesInputStream::BytesInputStream(const ByteString& _str)
{
    __str = _str;
    __begin = _str;
    __end = __begin + _str.length();
}
 
size_t BytesInputStream::available() const
    __DCL_THROWS1(IOException*)
{
    return __end - __begin;
}
 
size_t BytesInputStream::read(void* _buf, size_t _n) 
    __DCL_THROWS1(IOException*)
{
    __DCL_ASSERT_PARAM(_buf != NULL);
 
    size_t n = __MIN(__end - __begin, _n);
    memcpy(_buf, __begin, n);
    __begin += n;
 
    return n;
}
 
__DCL_END_NAMESPACE