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Length: 1046 (0x416)
Types: TextFile
Names: »XAppendVertex.c«
└─⟦a0efdde77⟧ Bits:30001252 EUUGD11 Tape, 1987 Spring Conference Helsinki
└─⟦526ad3590⟧ »EUUGD11/gnu-31mar87/X.V10.R4.tar.Z«
└─⟦2109abc41⟧
└─⟦this⟧ »./X.V10R4/Xlib/XAppendVertex.c«
#include <X/mit-copyright.h>
/* $Header: XAppendVertex.c,v 10.6 86/04/22 15:19:07 jg Rel $ */
/* Copyright Massachusetts Institute of Technology 1985 */
#include "XlibInternal.h"
XAppendVertex (vertices, nvert)
Vertex vertices[];
int nvert;
{
register Display *dpy = _XlibCurrentDisplay;
register XReq *lastdraw;
register char *old_bufptr, *new_bufptr;
int nbytes;
if ((lastdraw = (XReq*)(dpy->lastdraw)) == NULL)
return (0); /* no draw command in output buffer */
old_bufptr = dpy->bufptr;
/* subtract off any padding */
if (lastdraw->params0 & 1)
old_bufptr -= 2;
new_bufptr = old_bufptr + (nbytes = nvert*sizeof(Vertex));
if (new_bufptr >= dpy->bufmax)
return (-1); /* vertices don't fit */
/* increment number of vertices in XDraw packet */
lastdraw->params0 += nvert;
PackShorts(vertices, old_bufptr, nbytes);
/* add in padding if needed */
if (lastdraw->params0 & 1)
new_bufptr += 2;
dpy->bufptr = new_bufptr;
return (nvert);
}