/*
Copyright 2005-2013 Jay Sorg

Permission to use, copy, modify, distribute, and sell this software and its
documentation for any purpose is hereby granted without fee, provided that
the above copyright notice appear in all copies and that both that
copyright notice and this permission notice appear in supporting
documentation.

The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

*/

#if defined(__arm__) && !defined(__arm32__)
#define __arm32__
#endif

#include "xorg-server.h"
#include <stdio.h>
#include <stdarg.h>
#include <stdlib.h>
#include <errno.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/param.h>
#include <sys/stat.h>
#include <netinet/tcp.h>
#include <netinet/in.h>
#include <netdb.h>
#include "X.h"
#define NEED_EVENTS
#include "Xproto.h"
#include "Xos.h"
#include "scrnintstr.h"
#include "servermd.h"
#define PSZ 8

//#include "cfb.h"

#include "mibstore.h"
#include "colormapst.h"
#include "gcstruct.h"
#include "input.h"
#include "mipointer.h"
#include "dixstruct.h"
#include "propertyst.h"
#include "Xatom.h"
#include "dix.h"
#include "X11/keysym.h"
#include "dixfontstr.h"
#include "fontstruct.h"
#include "cursorstr.h"
#include "picturestr.h"
#include "XKBstr.h"
#include "inputstr.h"
#include "randrstr.h"
#include "mi.h"
#include "fb.h"
#include "micmap.h"
#include "events.h"
#include "exevents.h"
#include "xserver-properties.h"
#include "xkbsrv.h"
/* in xrdp/common */
#include "xrdp_client_info.h"
#include "xrdp_constants.h"

//#include "colormapst.h"

/* test to see if this is xorg source or xfree86 */
#ifdef XORGSERVER
#  define RDP_IS_XORG
#else
#  include <xf86Version.h>
#  if (XF86_VERSION_MAJOR == 4 && XF86_VERSION_MINOR > 3)
#    define RDP_IS_XFREE86
#  elif (XF86_VERSION_MAJOR > 4)
#    define RDP_IS_XFREE86
#  else
#    define RDP_IS_XORG
#  endif
#endif

#define X11RDPVER "0.7.0"

#define PixelDPI 100
#define PixelToMM(_size) (((_size) * 254 + (PixelDPI) * 5) / ((PixelDPI) * 10))

#define TAG_COMPOSITE     0
#define TAG_COPYAREA      1
#define TAG_POLYFILLRECT  2
#define TAG_PUTIMAGE      3
#define TAG_POLYRECTANGLE 4
#define TAG_COPYPLANE     5
#define TAG_POLYARC       6
#define TAG_FILLPOLYGON   7
#define TAG_POLYFILLARC   8
#define TAG_IMAGETEXT8    9
#define TAG_POLYTEXT8     10
#define TAG_POLYTEXT16    11
#define TAG_IMAGETEXT16   12
#define TAG_IMAGEGLYPHBLT 13
#define TAG_POLYGLYPHBLT  14
#define TAG_PUSHPIXELS    15

struct image_data
{
  int width;
  int height;
  int bpp;
  int Bpp;
  int lineBytes;
  char* pixels;
  char* shmem_pixels;
  int shmem_id;
  int shmem_offset;
  int shmem_lineBytes;
};

/* Per-screen (framebuffer) structure.  There is only one of these, since we
   don't allow the X server to have multiple screens. */
struct _rdpScreenInfoRec
{
  int width;
  int paddedWidthInBytes;
  int height;
  int depth;
  int bitsPerPixel;
  int sizeInBytes; /* size of current used frame buffer */
  int sizeInBytesAlloc; /* size of current alloc frame buffer,
                           always >= sizeInBytes */
  char* pfbMemory;
  Pixel blackPixel;
  Pixel whitePixel;
  /* wrapped screen functions */
  /* Random screen procedures */
  CloseScreenProcPtr CloseScreen;
  /* GC procedures */
  CreateGCProcPtr CreateGC;
  /* Pixmap procedures */
  CreatePixmapProcPtr CreatePixmap;
  DestroyPixmapProcPtr DestroyPixmap;

  /* Window Procedures */
  CreateWindowProcPtr CreateWindow;
  DestroyWindowProcPtr DestroyWindow;
  PositionWindowProcPtr PositionWindow;
  RealizeWindowProcPtr RealizeWindow;
  UnrealizeWindowProcPtr UnrealizeWindow;
  ChangeWindowAttributesProcPtr ChangeWindowAttributes;
  WindowExposuresProcPtr WindowExposures;

  CreateColormapProcPtr CreateColormap;
  DestroyColormapProcPtr DestroyColormap;

  CopyWindowProcPtr CopyWindow;
  ClearToBackgroundProcPtr ClearToBackground;
  ScreenWakeupHandlerProcPtr WakeupHandler;
  CreatePictureProcPtr CreatePicture;
  DestroyPictureProcPtr DestroyPicture;
  CompositeProcPtr Composite;
  GlyphsProcPtr Glyphs;
  /* Backing store procedures */
  RestoreAreasProcPtr RestoreAreas;

  int rdp_width;
  int rdp_height;
  int rdp_bpp;
  int rdp_Bpp;
  int rdp_Bpp_mask;

  struct xrdp_client_info client_info;
};
typedef struct _rdpScreenInfoRec rdpScreenInfoRec;
typedef rdpScreenInfoRec* rdpScreenInfoPtr;

struct _rdpGCRec
{
  GCFuncs* funcs;
  GCOps* ops;
};
typedef struct _rdpGCRec rdpGCRec;
typedef rdpGCRec* rdpGCPtr;
#define GETGCPRIV(_pGC) \
(rdpGCPtr)dixGetPrivateAddr(&(_pGC->devPrivates), &g_rdpGCIndex)

struct _rdpWindowRec
{
  int status;
};
typedef struct _rdpWindowRec rdpWindowRec;
typedef rdpWindowRec* rdpWindowPtr;
#define GETWINPRIV(_pWindow) \
(rdpWindowPtr)dixGetPrivateAddr(&(_pWindow->devPrivates), &g_rdpWindowIndex)

#define XR_IS_ROOT(_pWindow) ((_pWindow)->drawable.pScreen->root == (_pWindow))

/* for tooltips */
#define XR_STYLE_TOOLTIP (0x80000000)
#define XR_EXT_STYLE_TOOLTIP (0x00000080 | 0x00000008)

/* for normal desktop windows */
/* WS_TILEDWINDOW (WS_OVERLAPPED | WS_CAPTION | WS_SYSMENU | WS_THICKFRAME |
                   WS_MINIMIZEBOX | WS_MAXIMIZEBOX) */
#define XR_STYLE_NORMAL (0x00C00000 | 0x00080000 | 0x00040000 | 0x00010000 | 0x00020000)
#define XR_EXT_STYLE_NORMAL (0x00040000)

/* for dialogs */
#define XR_STYLE_DIALOG (0x80000000)
#define XR_EXT_STYLE_DIALOG (0x00040000)

#define RDI_FILL 1
#define RDI_IMGLL 2 /* lossless */
#define RDI_IMGLY 3 /* lossy */
#define RDI_LINE 4
#define RDI_SCRBLT 5
#define RDI_TEXT 6

struct urdp_draw_item_fill
{
  int opcode;
  int fg_color;
  int bg_color;
  int pad0;
};

struct urdp_draw_item_img
{
  int opcode;
  int pad0;
};

struct urdp_draw_item_line
{
  int opcode;
  int fg_color;
  int bg_color;
  int width;
  xSegment* segs;
  int nseg;
  int flags;
};

struct urdp_draw_item_scrblt
{
  int srcx;
  int srcy;
  int dstx;
  int dsty;
  int cx;
  int cy;
};

struct urdp_draw_item_text
{
  int opcode;
  int fg_color;
  struct rdp_text* rtext; /* in rdpglyph.h */
};

union urdp_draw_item
{
  struct urdp_draw_item_fill fill;
  struct urdp_draw_item_img img;
  struct urdp_draw_item_line line;
  struct urdp_draw_item_scrblt scrblt;
  struct urdp_draw_item_text text;
};

struct rdp_draw_item
{
  int type; /* RDI_FILL, RDI_IMGLL, ... */
  int flags;
  struct rdp_draw_item* prev;
  struct rdp_draw_item* next;
  RegionPtr reg;
  union urdp_draw_item u;
};

#define XRDP_USE_COUNT_THRESHOLD 1

struct _rdpPixmapRec
{
  int status;
  int rdpindex;
  int con_number;
  int is_dirty;
  int is_scratch;
  int is_alpha_dirty_not;
  /* number of times used in a remote operation
     if this gets above XRDP_USE_COUNT_THRESHOLD
     then we force remote the pixmap */
  int use_count;
  int kind_width;
  struct rdp_draw_item* draw_item_head;
  struct rdp_draw_item* draw_item_tail;
};
typedef struct _rdpPixmapRec rdpPixmapRec;
typedef rdpPixmapRec* rdpPixmapPtr;
#define GETPIXPRIV(_pPixmap) \
(rdpPixmapPtr)dixGetPrivateAddr(&(_pPixmap->devPrivates), &g_rdpPixmapIndex)

#define XRDP_IS_OS(_priv) (_priv->status != 0)

/* rdpmisc.c */
void
rdpLog(char *format, ...);
int
rdpBitsPerPixel(int depth);
void
rdpClientStateChange(CallbackListPtr* cbl, pointer myData, pointer clt);
int
g_tcp_recv(int sck, void* ptr, int len, int flags);
void
g_tcp_close(int sck);
int
g_tcp_last_error_would_block(int sck);
void
g_sleep(int msecs);
int
g_tcp_send(int sck, void* ptr, int len, int flags);
void*
g_malloc(int size, int zero);
void
g_free(void* ptr);
void
g_sprintf(char* dest, char* format, ...);
int
g_tcp_socket(void);
int
g_tcp_local_socket_dgram(void);
int
g_tcp_local_socket_stream(void);
void
g_memcpy(void* d_ptr, const void* s_ptr, int size);
int
g_tcp_set_no_delay(int sck);
int
g_tcp_set_non_blocking(int sck);
int
g_tcp_accept(int sck);
int
g_tcp_select(int sck1, int sck2, int sck3);
int
g_tcp_bind(int sck, char* port);
int
g_tcp_local_bind(int sck, char* port);
int
g_tcp_listen(int sck);
int
g_create_dir(const char* dirname);
int
g_directory_exist(const char* dirname);
int
g_chmod_hex(const char* filename, int flags);
void
hexdump(unsigned char *p, unsigned int len);
void
RegionAroundSegs(RegionPtr reg, xSegment* segs, int nseg);
int
get_crc(char* data, int data_bytes);

/* rdpdraw.c */
Bool
rdpCloseScreen(int i, ScreenPtr pScreen);


int
draw_item_add(rdpPixmapRec* priv, struct rdp_draw_item* di);
int
draw_item_remove(rdpPixmapRec* priv, struct rdp_draw_item* di);
int
draw_item_remove_all(rdpPixmapRec* priv);
int
draw_item_pack(PixmapPtr pix, rdpPixmapRec* priv);
int
draw_item_add_img_region(rdpPixmapRec* priv, RegionPtr reg, int opcode,
                         int type, int code);
int
draw_item_add_fill_region(rdpPixmapRec* priv, RegionPtr reg, int color,
                          int opcode);
int
draw_item_add_line_region(rdpPixmapRec* priv, RegionPtr reg, int color,
                          int opcode, int width, xSegment* segs, int nsegs,
                          int is_segment);
int
draw_item_add_srcblt_region(rdpPixmapRec* priv, RegionPtr reg,
                            int srcx, int srcy, int dstx, int dsty,
                            int cx, int cy);
int
draw_item_add_text_region(rdpPixmapRec* priv, RegionPtr reg, int color,
                          int opcode, struct rdp_text* rtext);

PixmapPtr
rdpCreatePixmap(ScreenPtr pScreen, int width, int height, int depth,
                unsigned usage_hint);
Bool
rdpDestroyPixmap(PixmapPtr pPixmap);
int
xrdp_is_os(PixmapPtr pix, rdpPixmapPtr priv);
Bool
rdpCreateWindow(WindowPtr pWindow);
Bool
rdpDestroyWindow(WindowPtr pWindow);
Bool
rdpPositionWindow(WindowPtr pWindow, int x, int y);
Bool
rdpRealizeWindow(WindowPtr pWindow);
Bool
rdpUnrealizeWindow(WindowPtr pWindow);
Bool
rdpChangeWindowAttributes(WindowPtr pWindow, unsigned long mask);
void
rdpWindowExposures(WindowPtr pWindow, RegionPtr pRegion, RegionPtr pBSRegion);

Bool
rdpCreateGC(GCPtr pGC);
void
rdpCopyWindow(WindowPtr pWin, DDXPointRec ptOldOrg, RegionPtr pOldRegion);
void
rdpClearToBackground(WindowPtr pWin, int x, int y, int w, int h,
                     Bool generateExposures);
RegionPtr
rdpRestoreAreas(WindowPtr pWin, RegionPtr prgnExposed);
void
rdpInstallColormap(ColormapPtr pmap);
void
rdpUninstallColormap(ColormapPtr pmap);
int
rdpListInstalledColormaps(ScreenPtr pScreen, Colormap* pmaps);
void
rdpStoreColors(ColormapPtr pmap, int ndef, xColorItem* pdefs);
Bool
rdpSaveScreen(ScreenPtr pScreen, int on);
Bool
rdpRealizeCursor(ScreenPtr pScreen, CursorPtr pCursor);
Bool
rdpUnrealizeCursor(ScreenPtr pScreen, CursorPtr pCursor);
void
rdpCursorLimits(ScreenPtr pScreen, CursorPtr pCursor,
                BoxPtr pHotBox, BoxPtr pTopLeftBox);
void
rdpConstrainCursor(ScreenPtr pScreen, BoxPtr pBox);
Bool
rdpSetCursorPosition(ScreenPtr pScreen, int x, int y, Bool generateEvent);
Bool
rdpDisplayCursor(ScreenPtr pScreen, CursorPtr pCursor);
void
rdpRecolorCursor(ScreenPtr pScreen, CursorPtr pCursor,
                 Bool displayed);

/* rdpglyph.c */
/* look in rdpglyph.h */

/* rdpComposite.c */
int
rdpCreatePicture(PicturePtr pPicture);
void
rdpDestroyPicture(PicturePtr pPicture);
void
rdpComposite(CARD8 op, PicturePtr pSrc, PicturePtr pMask, PicturePtr pDst,
             INT16 xSrc, INT16 ySrc, INT16 xMask, INT16 yMask, INT16 xDst,
             INT16 yDst, CARD16 width, CARD16 height);

/* rdpinput.c */
int
rdpKeybdProc(DeviceIntPtr pDevice, int onoff);
int
rdpMouseProc(DeviceIntPtr pDevice, int onoff);
Bool
rdpCursorOffScreen(ScreenPtr* ppScreen, int* x, int* y);
void
rdpCrossScreen(ScreenPtr pScreen, Bool entering);
void
rdpPointerWarpCursor(DeviceIntPtr pDev, ScreenPtr pScr, int x, int y);
void
rdpPointerEnqueueEvent(DeviceIntPtr pDev, InternalEvent* event);
void
rdpPointerNewEventScreen(DeviceIntPtr pDev, ScreenPtr pScr, Bool fromDIX);
Bool
rdpSpriteRealizeCursor(DeviceIntPtr pDev, ScreenPtr pScr, CursorPtr pCurs);
Bool
rdpSpriteUnrealizeCursor(DeviceIntPtr pDev, ScreenPtr pScr, CursorPtr pCurs);
void
rdpSpriteSetCursor(DeviceIntPtr pDev, ScreenPtr pScr, CursorPtr pCurs,
                   int x, int y);
void
rdpSpriteMoveCursor(DeviceIntPtr pDev, ScreenPtr pScr, int x, int y);
Bool
rdpSpriteDeviceCursorInitialize(DeviceIntPtr pDev, ScreenPtr pScr);
void
rdpSpriteDeviceCursorCleanup(DeviceIntPtr pDev, ScreenPtr pScr);
void
PtrAddEvent(int buttonMask, int x, int y);
void
KbdAddEvent(int down, int param1, int param2, int param3, int param4);
void
KbdSync(int param1);

/* rdpup.c */
int
rdpup_add_os_bitmap(PixmapPtr pixmap, rdpPixmapPtr priv);
int
rdpup_remove_os_bitmap(int rdpindex);
int
rdpup_update_os_use(int rdpindex);
void
rdpup_get_screen_image_rect(struct image_data* id);
void
rdpup_get_pixmap_image_rect(PixmapPtr pPixmap, struct image_data* id);
int
rdpup_init(void);
int
rdpup_check(void);
int
rdpup_begin_update(void);
int
rdpup_end_update(void);
int
rdpup_fill_rect(short x, short y, int cx, int cy);
int
rdpup_screen_blt(short x, short y, int cx, int cy, short srcx, short srcy);
int
rdpup_set_clip(short x, short y, int cx, int cy);
int
rdpup_reset_clip(void);
int
rdpup_set_fgcolor(int fgcolor);
int
rdpup_set_bgcolor(int bgcolor);
int
rdpup_set_opcode(int opcode);
int
rdpup_paint_rect(short x, short y, int cx, int cy,
                 char* bmpdata, int width, int height,
                 short srcx, short srcy);
int
rdpup_set_pen(int style, int width);
int
rdpup_draw_line(short x1, short y1, short x2, short y2);
void
rdpup_send_area(struct image_data* id, int x, int y, int w, int h);
int
rdpup_set_cursor(short x, short y, char* cur_data, char* cur_mask);
int
rdpup_set_cursor_ex(short x, short y, char *cur_data, char *cur_mask, int bpp);
int
rdpup_create_os_surface(int rdpindexd, int width, int height);
int
rdpup_create_os_surface_bpp(int rdpindexd, int width, int height, int bpp);
int
rdpup_switch_os_surface(int rdpindex);
int
rdpup_delete_os_surface(int rdpindex);

void
rdpup_paint_rect_os(int x, int y, int cx, int cy,
                    int rdpindex, int srcx, int srcy);
void
rdpup_set_hints(int hints, int mask);
void
rdpup_create_window(WindowPtr pWindow, rdpWindowRec* priv);
void
rdpup_delete_window(WindowPtr pWindow, rdpWindowRec* priv);
int
rdpup_check_dirty(PixmapPtr pDirtyPixmap, rdpPixmapRec* pDirtyPriv);
int
rdpup_check_alpha_dirty(PixmapPtr pDirtyPixmap, rdpPixmapRec* pDirtyPriv);
int
rdpup_check_dirty_screen(rdpPixmapRec* pDirtyPriv);
int
rdpup_add_char(int font, int charactor, short x, short y, int cx, int cy,
               char* bmpdata, int bmpdata_bytes);
int
rdpup_add_char_alpha(int font, int charactor, short x, short y, int cx, int cy,
                     char* bmpdata, int bmpdata_bytes);
int
rdpup_draw_text(int font, int flags, int mixmode,
                short clip_left, short clip_top,
                short clip_right, short clip_bottom,
                short box_left, short box_top,
                short box_right, short box_bottom, short x, short y,
                char* data, int data_bytes);
int
rdpup_composite(short srcidx, int srcformat, short srcwidth, CARD8 srcrepeat,
                PictTransform* srctransform, CARD8 mskflags,
                short mskidx, int mskformat, short mskwidth, CARD8 mskrepeat,
                CARD8 op, short srcx, short srcy, short mskx, short msky,
                short dstx, short dsty, short width, short height,
                int dstformat);

void
rdpScheduleDeferredUpdate(void);

int
rdpXvInit(ScreenPtr pScreen);

#if defined(X_BYTE_ORDER)
#  if X_BYTE_ORDER == X_LITTLE_ENDIAN
#    define L_ENDIAN
#  else
#    define B_ENDIAN
#  endif
#else
#  error Unknown endianness in rdp.h
#endif
/* check if we need to align data */
/* check if we need to align data */
#if defined(__sparc__) || defined(__alpha__) || defined(__hppa__) || \
    defined(__AIX__) || defined(__PPC__) || defined(__mips__) || \
    defined(__ia64__) || defined(__ppc__) || defined(__arm__)
#define NEED_ALIGN
#endif

/* parser state */
struct stream
{
  char* p;
  char* end;
  char* data;
  int size;
  /* offsets of various headers */
  char* iso_hdr;
  char* mcs_hdr;
  char* sec_hdr;
  char* rdp_hdr;
  char* channel_hdr;
  char* next_packet;
};

/******************************************************************************/
#define s_push_layer(s, h, n) \
{ \
  (s)->h = (s)->p; \
  (s)->p += (n); \
}

/******************************************************************************/
#define s_pop_layer(s, h) \
{ \
  (s)->p = (s)->h; \
}

/******************************************************************************/
#if defined(B_ENDIAN) || defined(NEED_ALIGN)
#define out_uint16_le(s, v) \
{ \
  *((s)->p) = (unsigned char)((v) >> 0); \
  (s)->p++; \
  *((s)->p) = (unsigned char)((v) >> 8); \
  (s)->p++; \
}
#else
#define out_uint16_le(s, v) \
{ \
  *((unsigned short*)((s)->p)) = (unsigned short)(v); \
  (s)->p += 2; \
}
#endif

/******************************************************************************/
#define out_uint8(s, v) \
{ \
  *((s)->p) = (unsigned char)((v) >> 0); \
  (s)->p++; \
}

/******************************************************************************/
#define init_stream(s, v) \
{ \
  if ((v) > (s)->size) \
  { \
    g_free((s)->data); \
    (s)->data = (char*)g_malloc((v), 0); \
    (s)->size = (v); \
  } \
  (s)->p = (s)->data; \
  (s)->end = (s)->data; \
  (s)->next_packet = 0; \
}

/******************************************************************************/
#define out_uint8p(s, v, n) \
{ \
  g_memcpy((s)->p, (v), (n)); \
  (s)->p += (n); \
}

/******************************************************************************/
#define out_uint8a(s, v, n) \
{ \
  out_uint8p((s), (v), (n)); \
}

/******************************************************************************/
#define out_uint8s(s, n) do \
{ \
  memset((s)->p, 0, (n)); \
  (s)->p += (n); \
} while (0)

/******************************************************************************/
#if defined(B_ENDIAN) || defined(NEED_ALIGN)
#define out_uint32_le(s, v) \
{ \
  *((s)->p) = (unsigned char)((v) >> 0); \
  (s)->p++; \
  *((s)->p) = (unsigned char)((v) >> 8); \
  (s)->p++; \
  *((s)->p) = (unsigned char)((v) >> 16); \
  (s)->p++; \
  *((s)->p) = (unsigned char)((v) >> 24); \
  (s)->p++; \
}
#else
#define out_uint32_le(s, v) \
{ \
  *((unsigned int*)((s)->p)) = (v); \
  (s)->p += 4; \
}
#endif

/******************************************************************************/
#if defined(B_ENDIAN) || defined(NEED_ALIGN)
#define in_uint32_le(s, v) \
{ \
  (v) = (unsigned int) \
    ( \
      (*((unsigned char*)((s)->p + 0)) << 0) | \
      (*((unsigned char*)((s)->p + 1)) << 8) | \
      (*((unsigned char*)((s)->p + 2)) << 16) | \
      (*((unsigned char*)((s)->p + 3)) << 24) \
    ); \
  (s)->p += 4; \
}
#else
#define in_uint32_le(s, v) \
{ \
  (v) = *((unsigned int*)((s)->p)); \
  (s)->p += 4; \
}
#endif

/******************************************************************************/
#if defined(B_ENDIAN) || defined(NEED_ALIGN)
#define in_uint16_le(s, v) \
{ \
  (v) = (unsigned short) \
    ( \
      (*((unsigned char*)((s)->p + 0)) << 0) | \
      (*((unsigned char*)((s)->p + 1)) << 8) \
    ); \
  (s)->p += 2; \
}
#else
#define in_uint16_le(s, v) \
{ \
  (v) = *((unsigned short*)((s)->p)); \
  (s)->p += 2; \
}
#endif

/******************************************************************************/
#define s_mark_end(s) \
{ \
  (s)->end = (s)->p; \
}

/******************************************************************************/
#define make_stream(s) \
{ \
  (s) = (struct stream*)g_malloc(sizeof(struct stream), 1); \
}

/******************************************************************************/
#define free_stream(s) do \
{ \
  if ((s) != 0) \
  { \
    g_free((s)->data); \
  } \
  g_free((s)); \
} while (0)
