vle binary write (Big Endian)

binary file write functions (Big Endian)

These functions allow to write data to binary files, using the direct Lisp data.
Lisp applications can use these functions to write data to application-specific (binary) data files.

This function set using "-be" suffix is intended to write the data, when stored in "Big Endian" byte sequence on the file.

This implies that the logical and physical structure of a "binary file" is known from their documentations.

signed integer 8 bit	signed integer 16 bit	signed integer 32 bit	signed integer 64 bit
unsigned integer 8 bit	unsigned integer 16 bit	unsigned integer 32 bit	unsigned integer 64 bit
float (4 bytes)	double (8 bytes)

Remarks

the file must have been opened by (open <filename> "wb") : the "wb" mode means "write binary" and is undocumented but supported by AutoLISP as well
these functions are already provided by emulation (vle-extension.lsp), but not fully functional under non-BricsCAD systems due to limitations of AutoLISP (work-in-progress), please use with care !
using these functions only with BricsCAD is suggested
"Little Endian" is the default byte-sequence for x86 + x64 processors, "lowest byte on lowest address";
"Big Endian" byte-sequence originates from Motorola and other processors (Mac), "highest byte on lowest address