1 /************************************************************
2 Copyright (c) 1993 by Silicon Graphics Computer Systems, Inc.
3
4 Permission to use, copy, modify, and distribute this
5 software and its documentation for any purpose and without
6 fee is hereby granted, provided that the above copyright
7 notice appear in all copies and that both that copyright
8 notice and this permission notice appear in supporting
9 documentation, and that the name of Silicon Graphics not be
10 used in advertising or publicity pertaining to distribution
11 of the software without specific prior written permission.
12 Silicon Graphics makes no representation about the suitability
13 of this software for any purpose. It is provided "as is"
14 without any express or implied warranty.
15
16 SILICON GRAPHICS DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS
17 SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
18 AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL SILICON
19 GRAPHICS BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL
20 DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
21 DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
22 OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH
23 THE USE OR PERFORMANCE OF THIS SOFTWARE.
24
25 ********************************************************/
26
27 #ifdef HAVE_CONFIG_H
28 #include <config.h>
29 #endif
30 #include <stdio.h>
31 #include "Xlibint.h"
32 #include "XKBlibint.h"
33 #include <X11/extensions/XKBproto.h>
34
35 /***====================================================================***/
36
37 int
_XkbInitReadBuffer(Display * dpy,XkbReadBufferPtr buf,int size)38 _XkbInitReadBuffer(Display *dpy, XkbReadBufferPtr buf, int size)
39 {
40 if ((dpy != NULL) && (buf != NULL) && (size > 0)) {
41 buf->error = 0;
42 buf->size = size;
43 buf->start = buf->data = _XkbAlloc(size);
44 if (buf->start) {
45 _XRead(dpy, buf->start, size);
46 return 1;
47 }
48 }
49 return 0;
50 }
51
52 #define _XkbReadBufferDataLeft(b) (((b)->size)-((b)->data-(b)->start))
53
54 int
_XkbSkipReadBufferData(XkbReadBufferPtr from,int size)55 _XkbSkipReadBufferData(XkbReadBufferPtr from, int size)
56 {
57 if (size == 0)
58 return 1;
59 if ((from == NULL) || (from->error) || (size < 1) ||
60 (_XkbReadBufferDataLeft(from) < size))
61 return 0;
62 from->data += size;
63 return 1;
64 }
65
66 int
_XkbCopyFromReadBuffer(XkbReadBufferPtr from,char * to,int size)67 _XkbCopyFromReadBuffer(XkbReadBufferPtr from, char *to, int size)
68 {
69 if (size == 0)
70 return 1;
71 if ((from == NULL) || (from->error) || (to == NULL) || (size < 1) ||
72 (_XkbReadBufferDataLeft(from) < size))
73 return 0;
74 memcpy(to, from->data, (size_t)size);
75 from->data += size;
76 return 1;
77 }
78
79 #ifdef XKB_FORCE_INT_KEYSYM
80 int
_XkbReadCopyKeySyms(int * wire,KeySym * to,int num_words)81 _XkbReadCopyKeySyms(int *wire, KeySym * to, int num_words)
82 {
83 while (num_words-- > 0) {
84 *to++ = *wire++;
85 }
86 return 1;
87 }
88
89 int
_XkbReadBufferCopyKeySyms(XkbReadBufferPtr from,KeySym * to,int num_words)90 _XkbReadBufferCopyKeySyms(XkbReadBufferPtr from, KeySym * to, int num_words)
91 {
92 if ((unsigned) (num_words * 4) > _XkbReadBufferDataLeft(from))
93 return 0;
94 _XkbReadCopyKeySyms((int *) from->data, to, num_words);
95 from->data += (4 * num_words);
96 return True;
97 }
98
99 int
_XkbWriteCopyKeySyms(register KeySym * from,CARD32 * to,int len)100 _XkbWriteCopyKeySyms(register KeySym * from, CARD32 *to, int len)
101 {
102 while (len-- > 0) {
103 *to++ = (CARD32) *from++;
104 }
105 return True;
106 }
107 #endif
108
109 #ifdef LONG64
110 int
_XkbReadCopyData32(int * wire,long * to,int num_words)111 _XkbReadCopyData32(int *wire, long *to, int num_words)
112 {
113 while (num_words-- > 0) {
114 *to++ = *wire++;
115 }
116 return 1;
117 }
118
119 int
_XkbReadBufferCopy32(XkbReadBufferPtr from,long * to,int num_words)120 _XkbReadBufferCopy32(XkbReadBufferPtr from, long *to, int num_words)
121 {
122 if ((unsigned) (num_words * 4) > _XkbReadBufferDataLeft(from))
123 return 0;
124 _XkbReadCopyData32((int *) from->data, to, num_words);
125 from->data += (4 * num_words);
126 return True;
127 }
128
129 int
_XkbWriteCopyData32(register unsigned long * from,CARD32 * to,int len)130 _XkbWriteCopyData32(register unsigned long *from, CARD32 *to, int len)
131 {
132 while (len-- > 0) {
133 *to++ = (CARD32) *from++;
134 }
135 return True;
136 }
137 #endif /* LONG64 */
138
139
140 char *
_XkbPeekAtReadBuffer(XkbReadBufferPtr from,int size)141 _XkbPeekAtReadBuffer(XkbReadBufferPtr from, int size)
142 {
143 if ((from == NULL) || (from->error) || (size < 1) ||
144 (_XkbReadBufferDataLeft(from) < size))
145 return NULL;
146 return from->data;
147 }
148
149 char *
_XkbGetReadBufferPtr(XkbReadBufferPtr from,int size)150 _XkbGetReadBufferPtr(XkbReadBufferPtr from, int size)
151 {
152 char *ptr;
153
154 if ((from == NULL) || (from->error) || (size < 1) ||
155 (_XkbReadBufferDataLeft(from) < size))
156 return NULL;
157 ptr = from->data;
158 from->data += size;
159 return ptr;
160 }
161
162
163 int
_XkbFreeReadBuffer(XkbReadBufferPtr buf)164 _XkbFreeReadBuffer(XkbReadBufferPtr buf)
165 {
166 if ((buf != NULL) && (buf->start != NULL)) {
167 int left;
168
169 left = (int) _XkbReadBufferDataLeft(buf);
170
171 Xfree(buf->start);
172 buf->size = 0;
173 buf->start = buf->data = NULL;
174 return left;
175 }
176 return 0;
177 }
178
179 Bool
_XkbGetReadBufferCountedString(XkbReadBufferPtr buf,char ** rtrn)180 _XkbGetReadBufferCountedString(XkbReadBufferPtr buf, char **rtrn)
181 {
182 CARD16 len, *pLen;
183 int left;
184 char *str = NULL;
185
186 if ((buf == NULL) || (buf->error) ||
187 ((left = (int) _XkbReadBufferDataLeft(buf)) < 4))
188 return False;
189 pLen = (CARD16 *) buf->data;
190 len = *pLen;
191 if (len > 0) {
192 if (XkbPaddedSize(len + 2) > left)
193 return False;
194 str = _XkbAlloc(len + 1);
195 if (str) {
196 memcpy(str, &buf->data[2], len);
197 str[len] = '\0';
198 }
199 }
200 buf->data += XkbPaddedSize(len + 2);
201 *rtrn = str;
202 return True;
203 }
204