1*4882a593Smuzhiyun /***********************************************************
2*4882a593Smuzhiyun
3*4882a593Smuzhiyun Copyright 1987, 1998 The Open Group
4*4882a593Smuzhiyun
5*4882a593Smuzhiyun Permission to use, copy, modify, distribute, and sell this software and its
6*4882a593Smuzhiyun documentation for any purpose is hereby granted without fee, provided that
7*4882a593Smuzhiyun the above copyright notice appear in all copies and that both that
8*4882a593Smuzhiyun copyright notice and this permission notice appear in supporting
9*4882a593Smuzhiyun documentation.
10*4882a593Smuzhiyun
11*4882a593Smuzhiyun The above copyright notice and this permission notice shall be included in
12*4882a593Smuzhiyun all copies or substantial portions of the Software.
13*4882a593Smuzhiyun
14*4882a593Smuzhiyun THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15*4882a593Smuzhiyun IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16*4882a593Smuzhiyun FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
17*4882a593Smuzhiyun OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
18*4882a593Smuzhiyun AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
19*4882a593Smuzhiyun CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
20*4882a593Smuzhiyun
21*4882a593Smuzhiyun Except as contained in this notice, the name of The Open Group shall not be
22*4882a593Smuzhiyun used in advertising or otherwise to promote the sale, use or other dealings
23*4882a593Smuzhiyun in this Software without prior written authorization from The Open Group.
24*4882a593Smuzhiyun
25*4882a593Smuzhiyun Copyright 1987 by Digital Equipment Corporation, Maynard, Massachusetts.
26*4882a593Smuzhiyun
27*4882a593Smuzhiyun All Rights Reserved
28*4882a593Smuzhiyun
29*4882a593Smuzhiyun Permission to use, copy, modify, and distribute this software and its
30*4882a593Smuzhiyun documentation for any purpose and without fee is hereby granted,
31*4882a593Smuzhiyun provided that the above copyright notice appear in all copies and that
32*4882a593Smuzhiyun both that copyright notice and this permission notice appear in
33*4882a593Smuzhiyun supporting documentation, and that the name of Digital not be
34*4882a593Smuzhiyun used in advertising or publicity pertaining to distribution of the
35*4882a593Smuzhiyun software without specific, written prior permission.
36*4882a593Smuzhiyun
37*4882a593Smuzhiyun DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
38*4882a593Smuzhiyun ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
39*4882a593Smuzhiyun DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
40*4882a593Smuzhiyun ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
41*4882a593Smuzhiyun WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
42*4882a593Smuzhiyun ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
43*4882a593Smuzhiyun SOFTWARE.
44*4882a593Smuzhiyun
45*4882a593Smuzhiyun ******************************************************************/
46*4882a593Smuzhiyun #ifdef HAVE_DIX_CONFIG_H
47*4882a593Smuzhiyun #include <dix-config.h>
48*4882a593Smuzhiyun #endif
49*4882a593Smuzhiyun
50*4882a593Smuzhiyun #include "regionstr.h"
51*4882a593Smuzhiyun #include "mistruct.h"
52*4882a593Smuzhiyun
53*4882a593Smuzhiyun void
miStepDash(int dist,int * pDashIndex,unsigned char * pDash,int numInDashList,int * pDashOffset)54*4882a593Smuzhiyun miStepDash(int dist, /* distance to step */
55*4882a593Smuzhiyun int *pDashIndex, /* current dash */
56*4882a593Smuzhiyun unsigned char *pDash, /* dash list */
57*4882a593Smuzhiyun int numInDashList, /* total length of dash list */
58*4882a593Smuzhiyun int *pDashOffset /* offset into current dash */
59*4882a593Smuzhiyun )
60*4882a593Smuzhiyun {
61*4882a593Smuzhiyun int dashIndex, dashOffset;
62*4882a593Smuzhiyun int totallen;
63*4882a593Smuzhiyun int i;
64*4882a593Smuzhiyun
65*4882a593Smuzhiyun dashIndex = *pDashIndex;
66*4882a593Smuzhiyun dashOffset = *pDashOffset;
67*4882a593Smuzhiyun if (dist < pDash[dashIndex] - dashOffset) {
68*4882a593Smuzhiyun *pDashOffset = dashOffset + dist;
69*4882a593Smuzhiyun return;
70*4882a593Smuzhiyun }
71*4882a593Smuzhiyun dist -= pDash[dashIndex] - dashOffset;
72*4882a593Smuzhiyun if (++dashIndex == numInDashList)
73*4882a593Smuzhiyun dashIndex = 0;
74*4882a593Smuzhiyun totallen = 0;
75*4882a593Smuzhiyun for (i = 0; i < numInDashList; i++)
76*4882a593Smuzhiyun totallen += pDash[i];
77*4882a593Smuzhiyun if (totallen <= dist)
78*4882a593Smuzhiyun dist = dist % totallen;
79*4882a593Smuzhiyun while (dist >= pDash[dashIndex]) {
80*4882a593Smuzhiyun dist -= pDash[dashIndex];
81*4882a593Smuzhiyun if (++dashIndex == numInDashList)
82*4882a593Smuzhiyun dashIndex = 0;
83*4882a593Smuzhiyun }
84*4882a593Smuzhiyun *pDashIndex = dashIndex;
85*4882a593Smuzhiyun *pDashOffset = dist;
86*4882a593Smuzhiyun }
87