/*
 * DO NOT EDIT.  THIS FILE IS GENERATED FROM /mnt/tinderbox/7.2-sdk/src/libs/xpcom18a4/xpcom/io/nsIInputStream.idl
 */

#ifndef __gen_nsIInputStream_h__
#define __gen_nsIInputStream_h__


#ifndef __gen_nsISupports_h__
#include "nsISupports.h"
#endif

/* For IDL files that don't want to include root IDL files. */
#ifndef NS_NO_VTABLE
#define NS_NO_VTABLE
#endif
class nsIInputStream; /* forward declaration */


/**
 * The signature of the writer function passed to ReadSegments. This
 * is the "consumer" of data that gets read from the stream's buffer.
 *
 * @param aInStream stream being read
 * @param aClosure opaque parameter passed to ReadSegments
 * @param aFromSegment pointer to memory owned by the input stream
 * @param aToOffset amount already read (since ReadSegments was called)
 * @param aCount length of fromSegment
 * @param aWriteCount number of bytes read
 *
 * Implementers should return the following:
 *
 * @return NS_OK and (*aWriteCount > 0) if consumed some data
 * @return <any-error> if not interested in consuming any data
 *
 * Errors are never passed to the caller of ReadSegments.
 *
 * NOTE: returning NS_OK and (*aWriteCount = 0) has undefined behavior.
 *
 * @status FROZEN
 */
typedef NS_CALLBACK(nsWriteSegmentFun)(nsIInputStream *aInStream,
                                       void *aClosure,
                                       const char *aFromSegment,
                                       PRUint32 aToOffset,
                                       PRUint32 aCount,
                                       PRUint32 *aWriteCount);

/* starting interface:    nsIInputStream */
#define NS_IINPUTSTREAM_IID_STR "fa9c7f6c-61b3-11d4-9877-00c04fa0cf4a"

#define NS_IINPUTSTREAM_IID \
  {0xfa9c7f6c, 0x61b3, 0x11d4, \
    { 0x98, 0x77, 0x00, 0xc0, 0x4f, 0xa0, 0xcf, 0x4a }}

class NS_NO_VTABLE nsIInputStream : public nsISupports {
 public: 

  NS_DEFINE_STATIC_IID_ACCESSOR(NS_IINPUTSTREAM_IID)

  /* void close (); */
  NS_IMETHOD Close(void) = 0;

  /* unsigned long available (); */
  NS_IMETHOD Available(PRUint32 *_retval) = 0;

  /* [noscript] unsigned long read (in charPtr aBuf, in unsigned long aCount); */
  NS_IMETHOD Read(char * aBuf, PRUint32 aCount, PRUint32 *_retval) = 0;

  /* [noscript] unsigned long readSegments (in nsWriteSegmentFun aWriter, in voidPtr aClosure, in unsigned long aCount); */
  NS_IMETHOD ReadSegments(nsWriteSegmentFun aWriter, void * aClosure, PRUint32 aCount, PRUint32 *_retval) = 0;

  /* boolean isNonBlocking (); */
  NS_IMETHOD IsNonBlocking(PRBool *_retval) = 0;

};

/* Use this macro when declaring classes that implement this interface. */
#define NS_DECL_NSIINPUTSTREAM \
  NS_IMETHOD Close(void) NS_OVERRIDE; \
  NS_IMETHOD Available(PRUint32 *_retval) NS_OVERRIDE; \
  NS_IMETHOD Read(char * aBuf, PRUint32 aCount, PRUint32 *_retval) NS_OVERRIDE; \
  NS_IMETHOD ReadSegments(nsWriteSegmentFun aWriter, void * aClosure, PRUint32 aCount, PRUint32 *_retval) NS_OVERRIDE; \
  NS_IMETHOD IsNonBlocking(PRBool *_retval) NS_OVERRIDE; 

/* Use this macro to declare functions that forward the behavior of this interface to another object. */
#define NS_FORWARD_NSIINPUTSTREAM(_to) \
  NS_IMETHOD Close(void) { return _to Close(); } \
  NS_IMETHOD Available(PRUint32 *_retval) { return _to Available(PRUint32 *_retval); } \
  NS_IMETHOD Read(char * aBuf, PRUint32 aCount, PRUint32 *_retval) { return _to Read(aBuf, aCount, PRUint32 *_retval); } \
  NS_IMETHOD ReadSegments(nsWriteSegmentFun aWriter, void * aClosure, PRUint32 aCount, PRUint32 *_retval) { return _to ReadSegments(aWriter, aClosure, aCount, PRUint32 *_retval); } \
  NS_IMETHOD IsNonBlocking(PRBool *_retval) { return _to IsNonBlocking(PRBool *_retval); } 

/* Use this macro to declare functions that forward the behavior of this interface to another object in a safe way. */
#define NS_FORWARD_SAFE_NSIINPUTSTREAM(_to) \
  NS_IMETHOD Close(void) { return !_to ? NS_ERROR_NULL_POINTER : _to->Close(); } \
  NS_IMETHOD Available(PRUint32 *_retval) { return !_to ? NS_ERROR_NULL_POINTER : _to->Available(PRUint32 *_retval); } \
  NS_IMETHOD Read(char * aBuf, PRUint32 aCount, PRUint32 *_retval) { return !_to ? NS_ERROR_NULL_POINTER : _to->Read(aBuf, aCount, PRUint32 *_retval); } \
  NS_IMETHOD ReadSegments(nsWriteSegmentFun aWriter, void * aClosure, PRUint32 aCount, PRUint32 *_retval) { return !_to ? NS_ERROR_NULL_POINTER : _to->ReadSegments(aWriter, aClosure, aCount, PRUint32 *_retval); } \
  NS_IMETHOD IsNonBlocking(PRBool *_retval) { return !_to ? NS_ERROR_NULL_POINTER : _to->IsNonBlocking(PRBool *_retval); } 


#endif /* __gen_nsIInputStream_h__ */
