michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
michael@0:  */
michael@0: 
michael@0: #ifndef _nsStreamFunctions_h_
michael@0: #define _nsStreamFunctions_h_
michael@0: 
michael@0: #include "nscore.h"
michael@0: #include "nsIInputStream.h"
michael@0: #include "nsIOutputStream.h"
michael@0: 
michael@0: /*
michael@0:  * ZIP file data is stored little-endian. These are helper functions to read and
michael@0:  * write little endian data to/from a char buffer.
michael@0:  * The off argument, where present, is incremented according to the number of
michael@0:  * bytes consumed from the buffer.
michael@0:  */
michael@0: inline NS_HIDDEN_(void) WRITE8(uint8_t* buf, uint32_t* off, uint8_t val)
michael@0: {
michael@0:   buf[(*off)++] = val;
michael@0: }
michael@0: 
michael@0: inline NS_HIDDEN_(void) WRITE16(uint8_t* buf, uint32_t* off, uint16_t val)
michael@0: {
michael@0:   WRITE8(buf, off, val & 0xff);
michael@0:   WRITE8(buf, off, (val >> 8) & 0xff);
michael@0: }
michael@0: 
michael@0: inline NS_HIDDEN_(void) WRITE32(uint8_t* buf, uint32_t* off, uint32_t val)
michael@0: {
michael@0:   WRITE16(buf, off, val & 0xffff);
michael@0:   WRITE16(buf, off, (val >> 16) & 0xffff);
michael@0: }
michael@0: 
michael@0: inline NS_HIDDEN_(uint8_t) READ8(const uint8_t* buf, uint32_t* off)
michael@0: {
michael@0:   return buf[(*off)++];
michael@0: }
michael@0: 
michael@0: inline NS_HIDDEN_(uint16_t) READ16(const uint8_t* buf, uint32_t* off)
michael@0: {
michael@0:   uint16_t val = READ8(buf, off);
michael@0:   val |= READ8(buf, off) << 8;
michael@0:   return val;
michael@0: }
michael@0: 
michael@0: inline NS_HIDDEN_(uint32_t) READ32(const uint8_t* buf, uint32_t* off)
michael@0: {
michael@0:   uint32_t val = READ16(buf, off);
michael@0:   val |= READ16(buf, off) << 16;
michael@0:   return val;
michael@0: }
michael@0: 
michael@0: inline NS_HIDDEN_(uint32_t) PEEK32(const uint8_t* buf)
michael@0: {
michael@0:   return (uint32_t)( (buf [0]      ) |
michael@0:                      (buf [1] <<  8) |
michael@0:                      (buf [2] << 16) |
michael@0:                      (buf [3] << 24) );
michael@0: }
michael@0: 
michael@0: NS_HIDDEN_(nsresult) ZW_ReadData(nsIInputStream *aStream, char *aBuffer, uint32_t aCount);
michael@0: 
michael@0: NS_HIDDEN_(nsresult) ZW_WriteData(nsIOutputStream *aStream, const char *aBuffer,
michael@0:                       uint32_t aCount);
michael@0: 
michael@0: #endif