auronandace
157 lines
6.5 KiB
Rust
157 lines
6.5 KiB
Rust
//! `limits.h` implementation.
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//!
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//! See <https://pubs.opengroup.org/onlinepubs/9799919799/basedefs/limits.h.html>.
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use crate::platform::types::{
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c_char, c_int, c_long, c_longlong, c_schar, c_short, c_uchar, c_uint, c_ulong, c_ulonglong,
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c_ushort, ssize_t,
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};
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pub use crate::header::bits_limits_ptdi::{
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_POSIX_THREAD_DESTRUCTOR_ITERATIONS, PTHREAD_DESTRUCTOR_ITERATIONS,
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};
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/// Maximum number of bytes in a filename (not including the terminating null
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/// of a filename string).
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pub const NAME_MAX: usize = 255;
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pub const PASS_MAX: usize = 128;
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/// Maximum number of bytes the implementation stores as a pathname in a
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/// user-supplied buffer of unspecified size, including the terminating null
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/// character.
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pub const PATH_MAX: usize = 4096;
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/// Maximum number of simultaneous supplementary group IDs per process.
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pub const NGROUPS_MAX: usize = 65536;
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/// Maximum number of `iovec` structures that one process has available for
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/// use with `readv()` or `writev()`.
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pub const IOV_MAX: c_int = 1024;
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/// Minimum required value for `IOV_MAX`.
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pub const _XOPEN_IOV_MAX: c_int = 16;
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/// Minimum required value for `NAME_MAX`.
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pub const _XOPEN_NAME_MAX: c_long = 255;
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/// Minimum required value for `PATH_MAX`.
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pub const _XOPEN_PATH_MAX: c_long = 1024;
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pub const CHAR_BIT: u32 = 8;
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pub const WORD_BIT: u32 = 32;
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#[cfg(target_pointer_width = "32")]
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pub const LONG_BIT: u32 = 32;
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#[cfg(target_pointer_width = "64")]
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pub const LONG_BIT: u32 = 64;
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#[cfg(any(target_arch = "aarch64", target_arch = "riscv64"))]
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pub const CHAR_MAX: c_char = 0xFF;
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#[cfg(not(any(target_arch = "aarch64", target_arch = "riscv64")))]
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pub const CHAR_MAX: c_char = 0x7F;
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pub const SCHAR_MAX: c_schar = 0x7F;
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pub const SHRT_MAX: c_short = 0x7FFF;
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pub const INT_MAX: c_int = 0x7FFF_FFFF;
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#[cfg(target_pointer_width = "32")]
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pub const LONG_MAX: c_long = 0x7FFF_FFFF;
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#[cfg(target_pointer_width = "64")]
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pub const LONG_MAX: c_long = 0x7FFF_FFFF_FFFF_FFFF;
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pub const LLONG_MAX: c_longlong = 0x7FFF_FFFF_FFFF_FFFF;
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#[cfg(target_pointer_width = "32")]
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pub const SSIZE_MAX: ssize_t = 0x7FFF_FFFF;
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#[cfg(target_pointer_width = "64")]
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pub const SSIZE_MAX: ssize_t = 0x7FFF_FFFF_FFFF_FFFF;
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pub const UCHAR_MAX: c_uchar = 0xFF;
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pub const USHRT_MAX: c_ushort = 0xFFFF;
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pub const UINT_MAX: c_uint = 0xFFFFFFFF;
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#[cfg(target_pointer_width = "32")]
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pub const ULONG_MAX: c_ulong = 0xFFFF_FFFF;
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#[cfg(target_pointer_width = "64")]
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pub const ULONG_MAX: c_ulong = 0xFFFF_FFFF_FFFF_FFFF;
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pub const ULLONG_MAX: c_ulonglong = 0xFFFF_FFFF_FFFF_FFFF;
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#[cfg(any(target_arch = "aarch64", target_arch = "riscv64"))]
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pub const CHAR_MIN: c_char = 0;
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#[cfg(not(any(target_arch = "aarch64", target_arch = "riscv64")))]
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pub const CHAR_MIN: c_char = -0x80;
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pub const SCHAR_MIN: c_schar = -SCHAR_MAX - 1;
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pub const SHRT_MIN: c_short = -SHRT_MAX - 1;
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pub const INT_MIN: c_int = -INT_MAX - 1;
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pub const LONG_MIN: c_long = -LONG_MAX - 1;
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pub const LLONG_MIN: c_longlong = -LLONG_MAX - 1;
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// TODO: 4096 for most architectures as determined by a quick grep of musl's source; need a better
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// way to determine it for other archs or to hard code a value.
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#[cfg(target_os = "linux")]
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pub const PAGE_SIZE: usize = 4096;
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// These POSIX symbols must have these values regardless of OS
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pub const _POSIX_AIO_LISTIO_MAX: c_long = 2;
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pub const _POSIX_AIO_MAX: c_long = 1;
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pub const _POSIX_ARG_MAX: c_long = 4096;
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pub const _POSIX_CHILD_MAX: c_long = 25;
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pub const _POSIX_CLOCKRES_MIN: c_long = 20000000;
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pub const _POSIX_DELAYTIMER_MAX: c_long = 32;
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pub const _POSIX_HOST_NAME_MAX: c_long = 255;
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pub const _POSIX_LINK_MAX: c_long = 8;
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pub const _POSIX_LOGIN_NAME_MAX: c_long = 9;
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pub const _POSIX_MAX_CANON: c_long = 255;
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pub const _POSIX_MAX_INPUT: c_long = 255;
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pub const _POSIX_NAME_MAX: c_long = 14;
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pub const _POSIX_NGROUPS_MAX: c_long = 8;
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pub const _POSIX_OPEN_MAX: c_long = 20;
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pub const _POSIX_PATH_MAX: c_long = 256;
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pub const _POSIX_PIPE_BUF: c_long = 512;
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pub const _POSIX_RE_DUP_MAX: c_long = 255;
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pub const _POSIX_RTSIG_MAX: c_long = 8;
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pub const _POSIX_SEM_NSEMS_MAX: c_long = 256;
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pub const _POSIX_SEM_VALUE_MAX: c_long = 32767;
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pub const _POSIX_SIGQUEUE_MAX: c_long = 32;
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pub const _POSIX_SSIZE_MAX: c_long = 32767;
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pub const _POSIX_STREAM_MAX: c_long = 8;
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pub const _POSIX_SYMLINK_MAX: c_long = 255;
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/// Minimum required value for `SYMLOOP_MAX`.
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pub const _POSIX_SYMLOOP_MAX: c_long = 8;
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// _POSIX_THREAD_DESTRUCTOR_ITERATIONS defined in bits file
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pub const _POSIX_THREAD_KEYS_MAX: c_long = 128;
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pub const _POSIX_THREAD_THREADS_MAX: c_long = 64;
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pub const _POSIX_TIMER_MAX: c_long = 32;
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pub const _POSIX_TTY_NAME_MAX: c_long = 9;
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pub const _POSIX_TZNAME_MAX: c_long = 6;
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pub const _POSIX2_BC_BASE_MAX: c_long = 99;
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pub const _POSIX2_BC_DIM_MAX: c_long = 2048;
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pub const _POSIX2_BC_SCALE_MAX: c_long = 99;
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pub const _POSIX2_BC_STRING_MAX: c_long = 1000;
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pub const _POSIX2_CHARCLASS_NAME_MAX: c_long = 14;
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pub const _POSIX2_COLL_WEIGHTS_MAX: c_long = 2;
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pub const _POSIX2_EXPR_NEST_MAX: c_long = 32;
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pub const _POSIX2_LINE_MAX: c_long = 2048;
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pub const _POSIX2_RE_DUP_MAX: c_long = 255;
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// These symbols must be at least the POSIX values, and sysconf will return the actual value between
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// the posix minimum and this maximum.
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pub const BC_BASE_MAX: c_long = _POSIX2_BC_BASE_MAX;
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pub const BC_DIM_MAX: c_long = _POSIX2_BC_DIM_MAX;
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pub const BC_SCALE_MAX: c_long = _POSIX2_BC_SCALE_MAX;
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pub const BC_STRING_MAX: c_long = _POSIX2_BC_STRING_MAX;
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pub const CHARCLASS_NAME_MAX: c_long = _POSIX2_CHARCLASS_NAME_MAX;
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pub const COLL_WEIGHTS_MAX: c_long = _POSIX2_COLL_WEIGHTS_MAX;
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pub const EXPR_NEST_MAX: c_long = _POSIX2_EXPR_NEST_MAX;
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pub const LINE_MAX: c_long = _POSIX2_LINE_MAX;
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pub const RE_DUP_MAX: c_long = _POSIX2_RE_DUP_MAX;
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pub const HOST_NAME_MAX: c_long = _POSIX_HOST_NAME_MAX;
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pub const LOGIN_NAME_MAX: c_long = 255;
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pub const GETENTROPY_MAX: c_long = 256;
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pub const LINK_MAX: c_long = 127;
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pub const PIPE_BUF: c_long = 4096;
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pub const FILESIZEBITS: c_long = 64;
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pub const MAX_CANON: c_long = _POSIX_MAX_CANON;
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pub const MAX_INPUT: c_long = _POSIX_MAX_INPUT;
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pub const SYMLINK_MAX: c_long = _POSIX_SYMLINK_MAX;
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pub const POSIX_ALLOC_SIZE_MIN: c_long = 4096;
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// PTHREAD_DESTRUCTOR_ITERATIONS defined in bits file
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// TODO: What should this limit be? Both glibc and musl have it as 1024
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pub const PTHREAD_KEYS_MAX: c_long = 4096 * 32;
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pub const PTHREAD_STACK_MIN: c_long = 65536;
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/// Maximum number of symbolic links that can be reliably traversed in the
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/// resolution of a pathname in the absence of a loop.
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pub const SYMLOOP_MAX: c_long = 64;
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pub const TTY_NAME_MAX: c_long = 32; // "/scheme/pty/".len() + size of usize::MAX as string + 1
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