vmware_common.c revision 3bfa90b6 
1/*
2 * Copyright 2011 VMWare, Inc.
3 * All Rights Reserved.
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the
7 * "Software"), to deal in the Software without restriction, including
8 * without limitation the rights to use, copy, modify, merge, publish,
9 * distribute, sub license, and/or sell copies of the Software, and to
10 * permit persons to whom the Software is furnished to do so, subject to
11 * the following conditions:
12 *
13 * The above copyright notice and this permission notice (including the
14 * next paragraph) shall be included in all copies or substantial portions
15 * of the Software.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
18 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
19 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
20 * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
21 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
22 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
23 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
24 *
25 * Author: Unknown at vmware
26 */
27#ifdef HAVE_CONFIG_H
28#include "config.h"
29#endif
30
31#include <xf86.h>
32#include "vmware_common.h"
33
34#ifndef HAVE_XORG_SERVER_1_5_0
35#include <xf86_ansic.h>
36#include <xf86_libc.h>
37#endif
38
39static int
40VMWAREParseTopologyElement(ScrnInfoPtr pScrn,
41                           unsigned int output,
42                           const char *elementName,
43                           const char *element,
44                           const char *expectedTerminators,
45                           Bool needTerminator,
46                           unsigned int *outValue)
47{
48   char buf[10] = {0, };
49   size_t i = 0;
50   int retVal = -1;
51   const char *str = element;
52
53   for (i = 0; str[i] >= '0' && str[i] <= '9'; i++);
54   if (i == 0) {
55      xf86DrvMsg(pScrn->scrnIndex, X_INFO, "Output %u: unable to parse %s.\n",
56                 output, elementName);
57      goto exit;
58   }
59
60   strncpy(buf, str, i);
61   *outValue = atoi(buf);
62
63   if (*outValue > (unsigned short)-1) {
64      xf86DrvMsg(pScrn->scrnIndex, X_INFO, "Output %u: %s must be less than %hu.\n",
65                 output, elementName, (unsigned short)-1);
66      goto exit;
67   }
68
69   str += i;
70
71   if (needTerminator || str[0] != '\0') {
72      Bool unexpected = TRUE;
73
74      for (i = 0; i < strlen(expectedTerminators); i++) {
75         if (str[0] == expectedTerminators[i]) {
76            unexpected = FALSE;
77         }
78      }
79
80      if (unexpected) {
81         xf86DrvMsg(pScrn->scrnIndex, X_INFO,
82                    "Output %u: unexpected character '%c' after %s.\n",
83                    output, str[0], elementName);
84         goto exit;
85      } else {
86         str++;
87      }
88   }
89
90   retVal = str - element;
91
92 exit:
93   return retVal;
94}
95
96xXineramaScreenInfo *
97VMWAREParseTopologyString(ScrnInfoPtr pScrn,
98                          const char *topology,
99                          unsigned int *retNumOutputs,
100			  const char info[])
101{
102   xXineramaScreenInfo *extents = NULL;
103   unsigned int numOutputs = 0;
104   const char *str = topology;
105
106   xf86DrvMsg(pScrn->scrnIndex, X_INFO, "Parsing %s topology: Starting...\n",
107	      info);
108
109   do {
110      unsigned int x, y, width, height;
111      int i;
112
113      i = VMWAREParseTopologyElement(pScrn, numOutputs, "width", str, "xX", TRUE, &width);
114      if (i == -1) {
115         goto error;
116      }
117      str += i;
118
119      i = VMWAREParseTopologyElement(pScrn, numOutputs, "height", str, "+", TRUE, &height);
120      if (i == -1) {
121         goto error;
122      }
123      str += i;
124
125      i= VMWAREParseTopologyElement(pScrn, numOutputs, "X offset", str, "+", TRUE, &x);
126      if (i == -1) {
127         goto error;
128      }
129      str += i;
130
131      i = VMWAREParseTopologyElement(pScrn, numOutputs, "Y offset", str, ";", FALSE, &y);
132      if (i == -1) {
133         goto error;
134      }
135      str += i;
136
137      xf86DrvMsg(pScrn->scrnIndex, X_INFO, "Output %u: %ux%u+%u+%u\n",
138                 numOutputs, width, height, x, y);
139
140      numOutputs++;
141      extents = realloc(extents, numOutputs * sizeof (xXineramaScreenInfo));
142      extents[numOutputs - 1].x_org = x;
143      extents[numOutputs - 1].y_org = y;
144      extents[numOutputs - 1].width = width;
145      extents[numOutputs - 1].height = height;
146   } while (*str != 0);
147
148   xf86DrvMsg(pScrn->scrnIndex, X_INFO, "Parsing %s topology: Succeeded.\n",
149	      info);
150   goto exit;
151
152 error:
153   xf86DrvMsg(pScrn->scrnIndex, X_INFO, "Parsing %s topology: Failed.\n",
154	      info);
155
156   free(extents);
157   extents = NULL;
158   numOutputs = 0;
159
160 exit:
161   *retNumOutputs = numOutputs;
162   return extents;
163}
164