FSlibos.h revision 00ca1914 
1/*
2 * Copyright 1990 Network Computing Devices;
3 * Portions Copyright 1987 by Digital Equipment Corporation
4 *
5 * Permission to use, copy, modify, distribute, and sell this software
6 * and its documentation for any purpose is hereby granted without fee,
7 * provided that the above copyright notice appear in all copies and
8 * that both that copyright notice and this permission notice appear
9 * in supporting documentation, and that the names of Network Computing
10 * Devices or Digital not be used in advertising or publicity pertaining
11 * to distribution of the software without specific, written prior
12 * permission. Network Computing Devices or Digital make no representations
13 * about the suitability of this software for any purpose.  It is provided
14 * "as is" without express or implied warranty.
15 *
16 * NETWORK COMPUTING DEVICES AND  DIGITAL DISCLAIM ALL WARRANTIES WITH
17 * REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF
18 * MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL NETWORK COMPUTING DEVICES
19 * OR DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES
20 * OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
21 * WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
22 * ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
23 * SOFTWARE.
24 */
25
26/*
27
28Copyright 1987, 1994, 1998  The Open Group
29
30Permission to use, copy, modify, distribute, and sell this software and its
31documentation for any purpose is hereby granted without fee, provided that
32the above copyright notice appear in all copies and that both that
33copyright notice and this permission notice appear in supporting
34documentation.
35
36The above copyright notice and this permission notice shall be included in
37all copies or substantial portions of the Software.
38
39THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
40IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
41FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
42OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
43AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
44CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
45
46Except as contained in this notice, the name of The Open Group shall not be
47used in advertising or otherwise to promote the sale, use or other dealings
48in this Software without prior written authorization from The Open Group.
49
50*/
51
52/*
53 * FSlib networking & os include file
54 */
55
56#include <X11/Xfuncs.h>
57#include <X11/Xfuncproto.h>
58#include <X11/Xosdefs.h>
59
60#ifndef WIN32
61
62# ifdef HAVE_STDINT_H
63#  include <stdint.h>	/* For SIZE_MAX */
64# endif
65
66/*
67 * makedepend screws up on #undef OPEN_MAX, so we define a new symbol
68 */
69
70# ifndef FS_OPEN_MAX
71
72#  ifdef _POSIX_SOURCE
73#   include <limits.h>
74#  else
75#   define _POSIX_SOURCE
76#   include <limits.h>
77#   undef _POSIX_SOURCE
78#  endif
79#  ifndef SIZE_MAX
80#   ifdef ULONG_MAX
81#    define SIZE_MAX ULONG_MAX
82#   else
83#    define SIZE_MAX UINT_MAX
84#   endif
85#  endif
86#  ifndef OPEN_MAX
87#   include <sys/param.h>
88#   ifndef OPEN_MAX
89#    ifdef NOFILE
90#     define OPEN_MAX NOFILE
91#    else
92#     ifdef NOFILES_MAX
93#      define OPEN_MAX NOFILES_MAX
94#     endif
95#    endif
96#   endif
97#  endif
98
99#  ifndef OPEN_MAX
100#   define FS_OPEN_MAX 256
101#  else /* !OPEN_MAX */
102#   if OPEN_MAX > 256
103#    define FS_OPEN_MAX 256
104#   else
105#    define FS_OPEN_MAX OPEN_MAX
106#   endif
107#  endif /* OPEN_MAX */
108
109# endif /* FS_OPEN_MAX */
110
111# define NMSKBITS 32
112# define MSKCNT ((FS_OPEN_MAX + NMSKBITS - 1) / NMSKBITS)
113
114# ifdef LONG64
115typedef unsigned int FdSet[MSKCNT];
116# else
117typedef unsigned long FdSet[MSKCNT];
118# endif
119
120# if (MSKCNT==1)
121#  define BITMASK(i) (1 << (i))
122#  define MASKIDX(i) 0
123# endif
124
125# if (MSKCNT>1)
126#  define BITMASK(i) (1 << ((i) & (NMSKBITS - 1)))
127#  define MASKIDX(i) ((i) / NMSKBITS)
128# endif
129
130# define MASKWORD(buf, i) buf[MASKIDX(i)]
131# define BITSET(buf, i) MASKWORD(buf, i) |= BITMASK(i)
132# define BITCLEAR(buf, i) MASKWORD(buf, i) &= ~BITMASK(i)
133# define GETBIT(buf, i) (MASKWORD(buf, i) & BITMASK(i))
134
135# if (MSKCNT==1)
136#  define COPYBITS(src, dst) dst[0] = src[0]
137#  define CLEARBITS(buf) buf[0] = 0
138#  define MASKANDSETBITS(dst, b1, b2) dst[0] = (b1[0] & b2[0])
139#  define ORBITS(dst, b1, b2) dst[0] = (b1[0] | b2[0])
140#  define UNSETBITS(dst, b1) (dst[0] &= ~b1[0])
141#  define _FSANYSET(src) (src[0])
142# endif
143
144# if (MSKCNT==2)
145#  define COPYBITS(src, dst) { dst[0] = src[0]; dst[1] = src[1]; }
146#  define CLEARBITS(buf) { buf[0] = 0; buf[1] = 0; }
147#  define MASKANDSETBITS(dst, b1, b2)  {\
148		      dst[0] = (b1[0] & b2[0]);\
149		      dst[1] = (b1[1] & b2[1]); }
150#  define ORBITS(dst, b1, b2)  {\
151		      dst[0] = (b1[0] | b2[0]);\
152		      dst[1] = (b1[1] | b2[1]); }
153#  define UNSETBITS(dst, b1) {\
154                      dst[0] &= ~b1[0]; \
155                      dst[1] &= ~b1[1]; }
156#  define _FSANYSET(src) (src[0] || src[1])
157# endif
158
159# if (MSKCNT==3)
160#  define COPYBITS(src, dst) { dst[0] = src[0]; dst[1] = src[1]; \
161			     dst[2] = src[2]; }
162#  define CLEARBITS(buf) { buf[0] = 0; buf[1] = 0; buf[2] = 0; }
163#  define MASKANDSETBITS(dst, b1, b2)  {\
164		      dst[0] = (b1[0] & b2[0]);\
165		      dst[1] = (b1[1] & b2[1]);\
166		      dst[2] = (b1[2] & b2[2]); }
167#  define ORBITS(dst, b1, b2)  {\
168		      dst[0] = (b1[0] | b2[0]);\
169		      dst[1] = (b1[1] | b2[1]);\
170		      dst[2] = (b1[2] | b2[2]); }
171#  define UNSETBITS(dst, b1) {\
172                      dst[0] &= ~b1[0]; \
173                      dst[1] &= ~b1[1]; \
174                      dst[2] &= ~b1[2]; }
175#  define _FSANYSET(src) (src[0] || src[1] || src[2])
176# endif
177
178# if (MSKCNT==4)
179#  define COPYBITS(src, dst) dst[0] = src[0]; dst[1] = src[1]; \
180			   dst[2] = src[2]; dst[3] = src[3]
181#  define CLEARBITS(buf) buf[0] = 0; buf[1] = 0; buf[2] = 0; buf[3] = 0
182#  define MASKANDSETBITS(dst, b1, b2)  \
183                      dst[0] = (b1[0] & b2[0]);\
184                      dst[1] = (b1[1] & b2[1]);\
185                      dst[2] = (b1[2] & b2[2]);\
186                      dst[3] = (b1[3] & b2[3])
187#  define ORBITS(dst, b1, b2)  \
188                      dst[0] = (b1[0] | b2[0]);\
189                      dst[1] = (b1[1] | b2[1]);\
190                      dst[2] = (b1[2] | b2[2]);\
191                      dst[3] = (b1[3] | b2[3])
192#  define UNSETBITS(dst, b1) \
193                      dst[0] &= ~b1[0]; \
194                      dst[1] &= ~b1[1]; \
195                      dst[2] &= ~b1[2]; \
196                      dst[3] &= ~b1[3]
197#  define _FSANYSET(src) (src[0] || src[1] || src[2] || src[3])
198# endif
199
200# if (MSKCNT>4)
201#  define COPYBITS(src, dst) memmove((caddr_t) dst, (caddr_t) src, sizeof(FdSet))
202#  define CLEARBITS(buf) bzero((caddr_t) buf, sizeof(FdSet))
203#  define MASKANDSETBITS(dst, b1, b2)  \
204		      { int cri;			\
205			for (cri=0; cri<MSKCNT; cri++)	\
206		          dst[cri] = (b1[cri] & b2[cri]) }
207#  define ORBITS(dst, b1, b2)  \
208		      { int cri;			\
209		      for (cri=0; cri<MSKCNT; cri++)	\
210		          dst[cri] = (b1[cri] | b2[cri]) }
211#  define UNSETBITS(dst, b1) \
212		      { int cri;			\
213		      for (cri=0; cri<MSKCNT; cri++)	\
214		          dst[cri] &= ~b1[cri];  }
215#  if (MSKCNT==8)
216#   define _FSANYSET(src) (src[0] || src[1] || src[2] || src[3] || \
217			src[4] || src[5] || src[6] || src[7])
218#  endif
219/*
220 * If MSKCNT>4 and not 8, then _FSANYSET is a routine defined in FSlibInt.c.
221 *
222 * #define _FSANYSET(src) (src[0] || src[1] || src[2] || src[3] || src[4] ...)
223 */
224# endif
225
226
227#else
228
229# include <X11/Xwinsock.h>
230# include <X11/Xw32defs.h>
231
232typedef fd_set FdSet;
233
234# define CLEARBITS(set) FD_ZERO(&set)
235# define BITSET(set,s) FD_SET(s,&set)
236# define _FSANYSET(set) set.fd_count
237
238#endif
239
240#include <X11/Xtrans/Xtrans.h>
241#include <stdlib.h>
242#include <string.h>
243
244/*
245 * The following definitions can be used for locking requests in multi-threaded
246 * address spaces.
247 */
248#define LockDisplay(dis)
249#define LockMutex(mutex)
250#define UnlockMutex(mutex)
251#define UnlockDisplay(dis)
252#define FSfree(ptr) free((ptr))
253
254#ifndef HAVE_REALLOCARRAY
255extern _X_HIDDEN void *fsreallocarray(void *optr, size_t nmemb, size_t size);
256# define reallocarray(ptr, n, size) \
257    fsreallocarray((ptr), (size_t)(n), (size_t)(size))
258#endif
259
260/*
261 * Note that some machines do not return a valid pointer for malloc(0), in
262 * which case we provide an alternate under the control of the
263 * define MALLOC_0_RETURNS_NULL.  This is necessary because some
264 * FSlib code expects malloc(0) to return a valid pointer to storage.
265 */
266
267#if defined(MALLOC_0_RETURNS_NULL) || defined(__clang_analyzer__)
268# define FSmalloc(size) malloc(((size) > 0 ? (size) : 1))
269# define FSrealloc(ptr, size) realloc((ptr), ((size) > 0 ? (size) : 1))
270# define FScalloc(nelem, elsize) calloc(((nelem) > 0 ? (nelem) : 1), (elsize))
271# define FSreallocarray(ptr, n, size) \
272    reallocarray((ptr), ((n) == 0 ? 1 : (n)), size)
273
274#else
275
276# define FSmalloc(size) malloc((size))
277# define FSrealloc(ptr, size) realloc((ptr), (size))
278# define FScalloc(nelem, elsize) calloc((nelem), (elsize))
279# define FSreallocarray(ptr, n, size) reallocarray((ptr), (n), (size))
280
281#endif
282
283#define FSmallocarray(n, size) FSreallocarray(NULL, (n), (size))
284
285#define SearchString(string, char) index((string), (char))
286