/* * limits.h Machine and OS limits * * Copyright by WATCOM International Corp. 1988-1996. All rights reserved. * Copyright by QNX Software Systems Limited 1990-1996. All rights reserved. */ #ifndef _LIMITS_H_INCLUDED #define _LIMITS_H_INCLUDED #ifndef MB_CUR_MAX #define MB_CUR_MAX 6 #endif #ifndef MB_LEN_MAX #define MB_LEN_MAX 6 #endif /* * ANSI required limits */ #define CHAR_BIT 8 /* number of bits in a byte */ #ifdef __CHAR_SIGNED__ #define CHAR_MIN (-128) /* minimum value of a char */ #define CHAR_MAX 127 /* maximum value of a char */ #else #define CHAR_MIN 0 /* minimum value of a char */ #define CHAR_MAX 255 /* maximum value of a char */ #endif #define SCHAR_MIN (-128) /* minimum value of a signed char */ #define SCHAR_MAX 127 /* maximum value of a signed char */ #define UCHAR_MAX 255U /* maximum value of an unsigned char */ #define SHRT_MIN (-32767-1) /* minimum value of a short int */ #define SHRT_MAX 32767 /* maximum value of a short int */ #define USHRT_MAX 65535U /* maximum value of an unsigned short */ #define LONG_MAX 2147483647L /* maximum value of a long int */ #define LONG_MIN (-2147483647L-1) /* minimum value of a long int */ #define ULONG_MAX 4294967295UL /* maximum value of an unsigned long*/ #if defined(__386__) #define INT_MIN (-2147483647-1) /* minimum value of an int */ #define INT_MAX 2147483647 /* maximum value of an int */ #define UINT_MAX 4294967295U /* maximum value of an unsigned int*/ #else #define INT_MIN (-32767-1) /* minimum value of an int */ #define INT_MAX 32767 /* maximum value of an int */ #define UINT_MAX 65535U /* maximum value of an unsigned int*/ #endif #ifdef __WATCOM_INT64__ #define LONGLONG_MIN (-9223372036854775807I64-1) /* minimum value of an __int64 */ #define LONGLONG_MAX 9223372036854775807I64 /* maximum value of an __int64 */ #define ULONGLONG_MAX 18446744073709551615UI64 /* maximum value of an unsigned __int64*/ #endif #define _I8_MIN SCHAR_MIN /* minimum value of a signed 8 bit type */ #define _I8_MAX SCHAR_MAX /* maximum value of a signed 8 bit type */ #define _UI8_MAX UCHAR_MAX /* maximum value of an unsigned 8 bit type*/ #define _I16_MIN SHRT_MIN /* minimum value of a signed 16 bit type */ #define _I16_MAX SHRT_MAX /* maximum value of a signed 16 bit type */ #define _UI16_MAX USHRT_MAX /* maximum value of an unsigned 16 bit type*/ #define _I32_MIN LONG_MIN /* minimum value of a signed 32 bit type */ #define _I32_MAX LONG_MAX /* maximum value of a signed 32 bit type */ #define _UI32_MAX ULONG_MAX /* maximum value of an unsigned 32 bit type*/ #ifdef __WATCOM_INT64__ #define _I64_MIN LONGLONG_MIN /* minimum value of a signed 64 bit type */ #define _I64_MAX LONGLONG_MAX /* maximum value of a signed 64 bit type */ #define _UI64_MAX ULONGLONG_MAX /* maximum value of an unsigned 64 bit type*/ #endif #if defined(_POSIX_SOURCE) || defined(_QNX_SOURCE) || !defined(NO_EXT_KEYS) /* * POSIX required limits. * These are minimums values, not absolute limits, * and the real value may be greater. */ #define _POSIX_ARG_MAX 4096 /* Length of args for exec */ /* functions including environment data*/ #define _POSIX_CHILD_MAX 6 /* Number of simultaneous */ /* processes per real user ID. */ #define _POSIX_LINK_MAX 8 /* Max. links per file */ #define _POSIX_MAX_CANON 255 /* No. bytes in terminal */ /* cannonical input queue. */ #define _POSIX_MAX_INPUT 255 /* Size of terminal input queue buffer */ #define _POSIX_NAME_MAX 14 /* Max bytes in a filename */ #define _POSIX_NGROUPS_MAX 0 /* Num. simultaneous supplementary */ /* group IDs per process */ #define _POSIX_OPEN_MAX 16 /* Min num. files open per process. */ #define _POSIX_PATH_MAX 255 /* Num. bytes in pathname (excl. NULL) */ #define _POSIX_PIPE_BUF 512 /* Num. bytes written atomically to a */ /* pipe. */ #define _POSIX_SSIZE_MAX 32767 /* The value that can be stored in an */ /* object of type ssize_t. */ #define _POSIX_STREAM_MAX 8 /* The number of streams that one */ /* process can have open at one time. */ #define _POSIX_SYMLOOP_MAX 8 /* The number of loops to traverse */ /* while resolving symbolic links */ /* or prefix aliases. */ #define _POSIX_TZNAME_MAX 3 /* The maximum number of bytes */ /* supported for the name of a time */ /* zone (not of the TZ variable). */ /* * Run-time increasable values * */ #define NGROUPS_MAX 1 /* Num. simultaneous supplementary */ /* group IDs per process */ /* * Run-time invariant values (possible indeterminate) * * CHILD_MAX and OPEN_MAX are indeterminate. */ #define ARG_MAX 61440 #undef CHILD_MAX /* no child max */ #undef OPEN_MAX /* no open max */ #undef STREAM_MAX /* no stream max */ #define TZNAME_MAX 128 /* QNX implementation maximum */ /* * Pathname variable values (may vary by pathname) */ #define LINK_MAX 65535u #define MAX_CANON _POSIX_MAX_CANON #define MAX_INPUT _POSIX_MAX_INPUT #define NAME_MAX 48 #define PATH_MAX _POSIX_PATH_MAX #define PIPE_BUF 5120 /* * Invariant values */ #define SSIZE_MAX _POSIX_SSIZE_MAX #define SYMLOOP_MAX 32 /* This is bigger than _POSIX_SYMLOOP_MAX */ /* * Posix .2/9 limits. */ #define BC_BASE_MAX 99 #define BC_DIM_MAX 2048 #define BC_SCALE_MAX 99 #define COLL_ELEM_MAX 4 #define EXPR_NEST_MAX 32 #define LINE_MAX 2048 #define PASTE_FILES_MAX 12 #define RE_DUP_MAX 255 #define SED_PATTERN_MAX 20480 #define SENDTO_MAX 90000L #define SORT_LINE_MAX 20480 #endif /* _POSIX_SOURCE || _QNX_SOURCE || !NO_EXT_KEYS */ #if defined(_QNX_SOURCE) || !defined(NO_EXT_KEYS) #define _QNX_ROOT_PREFIX_MAX 128 #define _QNX_PROXY_SIZE_MAX 100 #define _QNX_MXTAB_LEN 255 #define _QNX_MSGLEN 65500U #define _QNX_ATTACHEDNAME_MAX 64 #define _QNX_PREFIX_MAX 48 #define _QNX_ERRNOSTR_MAX 64 #endif #if defined(_QNX_C_SOURCE) && (_QNX_C_SOURCE >= 425) #define PTHREAD_STACK_MIN 0x1000 #define _POSIX_THREAD_DESTRUCTOR_ITERATIONS 4 #define _POSIX_THREAD_KEYS_MAX 128 #define _POSIX_THREAD_THREADS_MAX 500 #define PTHREAD_DESTRUCTOR_ITERATIONS _POSIX_THREAD_DESTRUCTOR_ITERATIONS #define PTHREAD_KEYS_MAX _POSIX_THREAD_KEYS_MAX #define PTHREAD_THREADS_MAX _POSIX_THREAD_THREADS_MAX #endif #endif