relibc/include/limits.h

#define MB_LEN_MAX 4 // unicode

#define CHAR_BIT __CHAR_BIT__
#define CHAR_MAX __CHAR_MAX__
#define CHAR_MIN 0
#define INT_MAX __INT_MAX__
#define INT_MIN (-INT_MAX - 1)
#define LLONG_MAX __LONG_LONG_MAX__
#define LLONG_MIN (-LLONG_MAX - 1)
#define LONG_BIT __LONG_BIT__
#define LONG_MAX __LONG_MAX__
#define LONG_MIN (-LONG_MAX - 1)
#define SCHAR_MAX __SCHAR_MAX__
#define SCHAR_MIN (-SCHAR_MAX - 1)
#define SHRT_MAX __SHRT_MAX__
#define SHRT_MIN (-SHRT_MAX - 1)

// TODO: These might not be accurate on all platforms
#define SSIZE_MAX ((1 << 64 - 1) - 1)
#define UCHAR_MAX 255
#define UINT_MAX ((1 << 32) - 1)
#define ULLONG_MAX ((1 << 64) - 1)
#define ULONG_MAX ((1 << 64) - 1)
#define USHRT_MAX ((1 << 16) - 1)
#define WORD_BIT 32

#define PATH_MAX 4096