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- /*
- * DO NOT EDIT. THIS FILE IS GENERATED FROM nsIStreamBufferAccess.idl
- */
-
- #ifndef __gen_nsIStreamBufferAccess_h__
- #define __gen_nsIStreamBufferAccess_h__
-
-
- #ifndef __gen_nsISupports_h__
- #include "nsISupports.h"
- #endif
-
- #ifndef __gen_nsrootidl_h__
- #include "nsrootidl.h"
- #endif
-
- /* For IDL files that don't want to include root IDL files. */
- #ifndef NS_NO_VTABLE
- #define NS_NO_VTABLE
- #endif
-
- /* starting interface: nsIStreamBufferAccess */
- #define NS_ISTREAMBUFFERACCESS_IID_STR "ac923b72-ac87-4892-ac7a-ca385d429435"
-
- #define NS_ISTREAMBUFFERACCESS_IID \
- {0xac923b72, 0xac87, 0x4892, \
- { 0xac, 0x7a, 0xca, 0x38, 0x5d, 0x42, 0x94, 0x35 }}
-
- /**
- * An interface for access to a buffering stream implementation's underlying
- * memory buffer.
- *
- * Stream implementations that QueryInterface to nsIStreamBufferAccess must
- * ensure that all buffers are aligned on the most restrictive type size for
- * the current architecture (e.g., sizeof(double) for RISCy CPUs). malloc(3)
- * satisfies this requirement.
- */
- class NS_NO_VTABLE nsIStreamBufferAccess : public nsISupports {
- public:
-
- NS_DEFINE_STATIC_IID_ACCESSOR(NS_ISTREAMBUFFERACCESS_IID)
-
- /**
- * Get access to a contiguous, aligned run of bytes in the stream's buffer.
- * Exactly one successful getBuffer call must occur before a putBuffer call
- * taking the non-null pointer returned by the successful getBuffer.
- *
- * The run of bytes are the next bytes (modulo alignment padding) to read
- * for an input stream, and the next bytes (modulo alignment padding) to
- * store before (eventually) writing buffered data to an output stream.
- * There can be space beyond this run of bytes in the buffer for further
- * accesses before the fill or flush point is reached.
- *
- * @param aLength
- * Count of contiguous bytes requested at the address A that satisfies
- * (A & aAlignMask) == 0 in the buffer, starting from the current stream
- * position, mapped to a buffer address B. The stream implementation
- * must pad from B to A by skipping bytes (if input stream) or storing
- * zero bytes (if output stream).
- *
- * @param aAlignMask
- * Bit-mask computed by subtracting 1 from the power-of-two alignment
- * modulus (e.g., 3 or sizeof(PRUint32)-1 for PRUint32 alignment).
- *
- * @return
- * The aligned pointer to aLength bytes in the buffer, or null if the
- * buffer has no room for aLength bytes starting at the next address A
- * after the current position that satisfies (A & aAlignMask) == 0.
- */
- /* [notxpcom] charPtr getBuffer (in PRUint32 aLength, in PRUint32 aAlignMask); */
- NS_IMETHOD_(char *) GetBuffer(PRUint32 aLength, PRUint32 aAlignMask) = 0;
-
- /**
- * Relinquish access to the stream's buffer, filling if at end of an input
- * buffer, flushing if completing an output buffer. After a getBuffer call
- * that returns non-null, putBuffer must be called.
- *
- * @param aBuffer
- * A non-null pointer returned by getBuffer on the same stream buffer
- * access object.
- *
- * @param aLength
- * The same count of contiguous bytes passed to the getBuffer call that
- * returned aBuffer.
- */
- /* [notxpcom] void putBuffer (in charPtr aBuffer, in PRUint32 aLength); */
- NS_IMETHOD_(void) PutBuffer(char * aBuffer, PRUint32 aLength) = 0;
-
- /**
- * Disable and enable buffering on the stream implementing this interface.
- * DisableBuffering flushes an output stream's buffer, and invalidates an
- * input stream's buffer.
- */
- /* void disableBuffering (); */
- NS_IMETHOD DisableBuffering(void) = 0;
-
- /* void enableBuffering (); */
- NS_IMETHOD EnableBuffering(void) = 0;
-
- /**
- * The underlying, unbuffered input or output stream.
- */
- /* readonly attribute nsISupports unbufferedStream; */
- NS_IMETHOD GetUnbufferedStream(nsISupports * *aUnbufferedStream) = 0;
-
- };
-
- /* Use this macro when declaring classes that implement this interface. */
- #define NS_DECL_NSISTREAMBUFFERACCESS \
- NS_IMETHOD_(char *) GetBuffer(PRUint32 aLength, PRUint32 aAlignMask); \
- NS_IMETHOD_(void) PutBuffer(char * aBuffer, PRUint32 aLength); \
- NS_IMETHOD DisableBuffering(void); \
- NS_IMETHOD EnableBuffering(void); \
- NS_IMETHOD GetUnbufferedStream(nsISupports * *aUnbufferedStream);
-
- /* Use this macro to declare functions that forward the behavior of this interface to another object. */
- #define NS_FORWARD_NSISTREAMBUFFERACCESS(_to) \
- NS_IMETHOD_(char *) GetBuffer(PRUint32 aLength, PRUint32 aAlignMask) { return _to GetBuffer(aLength, aAlignMask); } \
- NS_IMETHOD_(void) PutBuffer(char * aBuffer, PRUint32 aLength) { return _to PutBuffer(aBuffer, aLength); } \
- NS_IMETHOD DisableBuffering(void) { return _to DisableBuffering(); } \
- NS_IMETHOD EnableBuffering(void) { return _to EnableBuffering(); } \
- NS_IMETHOD GetUnbufferedStream(nsISupports * *aUnbufferedStream) { return _to GetUnbufferedStream(aUnbufferedStream); }
-
- /* Use this macro to declare functions that forward the behavior of this interface to another object in a safe way. */
- #define NS_FORWARD_SAFE_NSISTREAMBUFFERACCESS(_to) \
- NS_IMETHOD_(char *) GetBuffer(PRUint32 aLength, PRUint32 aAlignMask) { return !_to ? NS_ERROR_NULL_POINTER : _to->GetBuffer(aLength, aAlignMask); } \
- NS_IMETHOD_(void) PutBuffer(char * aBuffer, PRUint32 aLength) { return !_to ? NS_ERROR_NULL_POINTER : _to->PutBuffer(aBuffer, aLength); } \
- NS_IMETHOD DisableBuffering(void) { return !_to ? NS_ERROR_NULL_POINTER : _to->DisableBuffering(); } \
- NS_IMETHOD EnableBuffering(void) { return !_to ? NS_ERROR_NULL_POINTER : _to->EnableBuffering(); } \
- NS_IMETHOD GetUnbufferedStream(nsISupports * *aUnbufferedStream) { return !_to ? NS_ERROR_NULL_POINTER : _to->GetUnbufferedStream(aUnbufferedStream); }
-
- #if 0
- /* Use the code below as a template for the implementation class for this interface. */
-
- /* Header file */
- class nsStreamBufferAccess : public nsIStreamBufferAccess
- {
- public:
- NS_DECL_ISUPPORTS
- NS_DECL_NSISTREAMBUFFERACCESS
-
- nsStreamBufferAccess();
-
- private:
- ~nsStreamBufferAccess();
-
- protected:
- /* additional members */
- };
-
- /* Implementation file */
- NS_IMPL_ISUPPORTS1(nsStreamBufferAccess, nsIStreamBufferAccess)
-
- nsStreamBufferAccess::nsStreamBufferAccess()
- {
- /* member initializers and constructor code */
- }
-
- nsStreamBufferAccess::~nsStreamBufferAccess()
- {
- /* destructor code */
- }
-
- /* [notxpcom] charPtr getBuffer (in PRUint32 aLength, in PRUint32 aAlignMask); */
- NS_IMETHODIMP_(char *) nsStreamBufferAccess::GetBuffer(PRUint32 aLength, PRUint32 aAlignMask)
- {
- return NS_ERROR_NOT_IMPLEMENTED;
- }
-
- /* [notxpcom] void putBuffer (in charPtr aBuffer, in PRUint32 aLength); */
- NS_IMETHODIMP_(void) nsStreamBufferAccess::PutBuffer(char * aBuffer, PRUint32 aLength)
- {
- return NS_ERROR_NOT_IMPLEMENTED;
- }
-
- /* void disableBuffering (); */
- NS_IMETHODIMP nsStreamBufferAccess::DisableBuffering()
- {
- return NS_ERROR_NOT_IMPLEMENTED;
- }
-
- /* void enableBuffering (); */
- NS_IMETHODIMP nsStreamBufferAccess::EnableBuffering()
- {
- return NS_ERROR_NOT_IMPLEMENTED;
- }
-
- /* readonly attribute nsISupports unbufferedStream; */
- NS_IMETHODIMP nsStreamBufferAccess::GetUnbufferedStream(nsISupports * *aUnbufferedStream)
- {
- return NS_ERROR_NOT_IMPLEMENTED;
- }
-
- /* End of implementation class template. */
- #endif
-
- // Swap macros, used to convert to/from canonical (big-endian) format
- #if defined IS_LITTLE_ENDIAN
- # define NS_SWAP16(x) ((((x) & 0xff) << 8) | (((x) >> 8) & 0xff))
- # define NS_SWAP32(x) ((NS_SWAP16((x) & 0xffff) << 16) | (NS_SWAP16((x) >> 16)))
- // We want to avoid casting to 32-bit types if possible, since that violates
- // aliasing rules (a standard compiler may assume that pointers of two types
- // do not address overlapping storage).
- //
- // XXX What if we have a compiler that follows aliasing rules strictly but
- // doesn't have a 64-bit int type?
- //
- // XXXbe shouldn't NSPR's LL_INIT work for non-constant arguments in all cases?
- # if defined HAVE_LONG_LONG
- # if PR_BYTES_PER_LONG == 8
- # define ULL_(x) x ## UL
- # elif (defined WIN32 || defined WIN16) && !defined __GNUC__
- # define ULL_(x) ((uint64) x ## i64)
- # else
- # define ULL_(x) x ## ULL
- # endif
- # define NS_SWAP64(x) ((((x) & ULL_(0xff00000000000000)) >> 56) | \
- (((x) & ULL_(0x00ff000000000000)) >> 40) | \
- (((x) & ULL_(0x0000ff0000000000)) >> 24) | \
- (((x) & ULL_(0x000000ff00000000)) >> 8) | \
- (((x) & ULL_(0x00000000ff000000)) << 8) | \
- (((x) & ULL_(0x0000000000ff0000)) << 24) | \
- (((x) & ULL_(0x000000000000ff00)) << 40) | \
- (((x) /* & ULL_(0x00000000000000ff) */) << 56))
- # else
- # define NS_SWAP64(x) LL_INIT((((x).lo /* & 0xff000000ul */) >> 24) | \
- (((x).lo & 0x00ff0000ul) >> 8) | \
- (((x).lo & 0x0000ff00ul) << 8) | \
- (((x).lo /* & 0x000000fful */) << 24), \
- (((x).hi /* & 0xff000000ul */) >> 24) | \
- (((x).hi & 0x00ff0000ul) >> 8) | \
- (((x).hi & 0x0000ff00ul) << 8) | \
- (((x).hi /* & 0x000000fful */) << 24))
- # endif
- #elif defined IS_BIG_ENDIAN
- # define NS_SWAP16(x) (x)
- # define NS_SWAP32(x) (x)
- # define NS_SWAP64(x) (x)
- #else
- # error "Unknown byte order"
- #endif
- /**
- * These macros get and put a buffer given either an sba parameter that may
- * point to an object implementing nsIStreamBufferAccess, nsIObjectInputStream,
- * or nsIObjectOutputStream.
- */
- #define NS_GET_BUFFER(sba,n,a) ((sba)->GetBuffer(n, a))
- #define NS_PUT_BUFFER(sba,p,n) ((sba)->PutBuffer(p, n))
- #define NS_GET8(p) (*(PRUint8*)(p))
- #define NS_GET16(p) NS_SWAP16(*(PRUint16*)(p))
- #define NS_GET32(p) NS_SWAP32(*(PRUint32*)(p))
- #define NS_GET64(p) NS_SWAP64(*(PRUint64*)(p))
- #define NS_GET_FLOAT(p) ((float)NS_SWAP32(*(PRUint32*)(p)))
- #define NS_GET_DOUBLE(p) ((double)NS_SWAP64(*(PRUint64*)(p)))
- #define NS_PUT8(p,x) (*(PRUint8*)(p) = (x))
- #define NS_PUT16(p,x) (*(PRUint16*)(p) = NS_SWAP16(x))
- #define NS_PUT32(p,x) (*(PRUint32*)(p) = NS_SWAP32(x))
- #define NS_PUT64(p,x) (*(PRUint64*)(p) = NS_SWAP64(x))
- #define NS_PUT_FLOAT(p,x) (*(PRUint32*)(p) = NS_SWAP32(*(PRUint32*)&(x)))
- #define NS_PUT_DOUBLE(p,x) (*(PRUint64*)(p) = NS_SWAP64(*(PRUint64*)&(x)))
-
- #endif /* __gen_nsIStreamBufferAccess_h__ */
-