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xopen_lim.h
/* Copyright (C) 1996-2021 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. The GNU C Library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with the GNU C Library; if not, see <https://www.gnu.org/licenses/>. */ /* * Never include this file directly; use <limits.h> instead. */ /* Additional definitions from X/Open Portability Guide, Issue 4, Version 2 System Interfaces and Headers, 4.16 <limits.h> Please note only the values which are not greater than the minimum stated in the standard document are listed. The `sysconf' functions should be used to obtain the actual value. */ #ifndef _XOPEN_LIM_H #define _XOPEN_LIM_H 1 /* We do not provide fixed values for ARG_MAX Maximum length of argument to the `exec' function including environment data. ATEXIT_MAX Maximum number of functions that may be registered with `atexit'. CHILD_MAX Maximum number of simultaneous processes per real user ID. OPEN_MAX Maximum number of files that one process can have open at anyone time. PAGESIZE PAGE_SIZE Size of bytes of a page. PASS_MAX Maximum number of significant bytes in a password. We only provide a fixed limit for IOV_MAX Maximum number of `iovec' structures that one process has available for use with `readv' or writev'. if this is indeed fixed by the underlying system. */ /* Maximum number of `iovec' structures that may be used in a single call to `readv', `writev', etc. */ #define _XOPEN_IOV_MAX _POSIX_UIO_MAXIOV #include <bits/uio_lim.h> #ifdef __IOV_MAX # define IOV_MAX __IOV_MAX #else # undef IOV_MAX #endif /* Maximum value of `digit' in calls to the `printf' and `scanf' functions. We have no limit, so return a reasonable value. */ #define NL_ARGMAX _POSIX_ARG_MAX /* Maximum number of bytes in a `LANG' name. We have no limit. */ #define NL_LANGMAX _POSIX2_LINE_MAX /* Maximum message number. We have no limit. */ #define NL_MSGMAX INT_MAX /* Maximum number of bytes in N-to-1 collation mapping. We have no limit. */ #if defined __USE_GNU || !defined __USE_XOPEN2K8 # define NL_NMAX INT_MAX #endif /* Maximum set number. We have no limit. */ #define NL_SETMAX INT_MAX /* Maximum number of bytes in a message. We have no limit. */ #define NL_TEXTMAX INT_MAX /* Default process priority. */ #define NZERO 20 /* Number of bits in a word of type `int'. */ #ifdef INT_MAX # if INT_MAX == 32767 # define WORD_BIT 16 # else # if INT_MAX == 2147483647 # define WORD_BIT 32 # else /* Safe assumption. */ # define WORD_BIT 64 # endif # endif #elif defined __INT_MAX__ # if __INT_MAX__ == 32767 # define WORD_BIT 16 # else # if __INT_MAX__ == 2147483647 # define WORD_BIT 32 # else /* Safe assumption. */ # define WORD_BIT 64 # endif # endif #else # define WORD_BIT 32 #endif /* Number of bits in a word of type `long int'. */ #ifdef LONG_MAX # if LONG_MAX == 2147483647 # define LONG_BIT 32 # else /* Safe assumption. */ # define LONG_BIT 64 # endif #elif defined __LONG_MAX__ # if __LONG_MAX__ == 2147483647 # define LONG_BIT 32 # else /* Safe assumption. */ # define LONG_BIT 64 # endif #else # include <bits/wordsize.h> # if __WORDSIZE == 64 # define LONG_BIT 64 # else # define LONG_BIT 32 # endif #endif #endif /* bits/xopen_lim.h */
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