Brl cad format 64 Bit#
Brl cad format serial#
Brl cad format 64 bits#
Brl cad format portable#

Used to determine how many bits of a bit-vector subscript are index-of-bit in bitv_t word, and how many bits of the subscript are for word index. On most machines, this is 'long', but on some machines a vendor-specific type such as 'long long' can give access to wider integers.Д«ITV_SHIFT - log2( bits_wide(bitv_t) ). Any number smaller than this, when squared, can be expected to produce a zero result.Д«zero(ptr,n) - Defined to be the fasted system-specific method for zeroing a block of 'n' bytes, where the pointer has arbitrary byte alignment.Д«copy(from,to,n) - Defined to be the fastest system-specific method for copying a block of 'n' bytes, where both the 'from' and 'to' pointers have arbitrary byte alignment.Д«itv_t - The widest fast integer type available, used to implement bit vectors. The value of this is quite a lot larger than that of SMALL_FASTF. SQRT_SMALL_FASTF - sqrt(SMALL_FASTF), or slightly larger. All divisors should be checked against this value before actual division is performed. Any number smaller than this (and non-negative) can be considered to be zero dividing by such a number can be expected to produce a divide-by-zero error. SMALL_FASTF - Very close to the smallest value that can be represented while still being greater than zero. Any number larger than this, if squared, can be expected to produce an overflow. SQRT_MAX_FASTF - sqrt(MAX_FASTF), or slightly smaller. Typically specified as an integer power of ten, to make the value easy to spot when printed. MAX_FASTF - Very close to the largest value that can be held by a fastf_t without overflow. For production use, and lint, it will be defined as 'static', but for debugging it can be defined as NIL, so that the routine names can be made available to the debugger. HIDDEN - Functions intended to be local to one module should be declared HIDDEN. Thus, declaring a fast temporary fastf_t variable is done like: FAST fastf_t var On most machines with abundant registers, this is 'register', but on machines like the VAX with only 3 'register double's available to C programmers, it is set to LOCAL.

Brl cad format serial#

On parallel machines, this needs to be 'auto', but on serial machines there can sometimes be a performance advantage to using 'static'.ДЇAST - The fastest storage class for fastf_t variables. LOCAL - The fastest storage class for local variables within a subroutine.

The one exception is when a subroutine return is a floating point value that is always declared as 'double'. Virtually all floating point variables (and more complicated data types, like vect_t and mat_t) are defined as fastf_t.

Brl cad format 64 Bit#

On 16 and 32 bit machine, this is typically 'double', but on 64 bit machines, it is often 'float'.

Brl cad format 64 bits#

On some machines, pointers to functions can be wider than pointers to data bytes, so a declaration of 'char *' isn't generic enough.ДЇastf_t - Intended to be the fastest floating point data type on the current machine, with at least 64 bits of precision.

Brl cad format portable#

Genptr_t - A portable way of declaring a 'generic' pointer that is wide enough to point to anything, which can be used on both ANSI C and K&R C environments. Some may assume different values on the same machine, depending on which version of the compiler is being used.ДЄdditions will need to be made here when porting BRL-CAD to a new machine which is anything but a 32-bit big-endian uniprocessor. Many of these fundamental data types are machine (vendor) dependent. Virtually all other BRL-CAD header files depend on this header file being included first. This header file defines all the fundamental data types (lower case names, created with 'typedef') and fundamental manifest constants (upper case, created with '#define') used throughout the BRL-CAD Package. This graph shows which files directly or indirectly include this file:Д«copy(from, to, count) memcpy( to, from, count ) Include machine.h File ReferenceThis header file defines all the fundamental data types (lower case names, created with 'typedef') and fundamental manifest constants (upper case, created with '#define') used throughout the BRL-CAD Package.