ref: a920c765f2b4130590fb5971a50690b21664957a
dir: /man/2/math-export/
.TH MATH-EXPORT 2 .SH NAME Math: export_int, export_real, export_real32, import_int, import_real, import_real32 \- conversion to and from external representation .SH SYNOPSIS .EX include "math.m"; math := load Math Math->PATH; export_int: fn(b: array of byte, x: array of int); export_real32: fn(b: array of byte, x: array of real); export_real: fn(b: array of byte, x: array of real); import_int: fn(b: array of byte, x: array of int); import_real32: fn(b: array of byte, x: array of real); import_real: fn(b: array of byte, x: array of real); .EE .SH DESCRIPTION These routines convert between Limbo's internal representation of integer and floating-point values, and equivalent external representations as arrays of bytes, allowing efficient input/output of binary representations. .PP .BI Export_int( b , \ x ) converts each integer element of array .I x into a sequence of 4 bytes in array .IR b . .PP .BI Export_real( b , \ x ) converts each double-precision floating-point element of array .I x into a sequence of 8 bytes in array .IR b . .PP .BI Export_real32( b , \ x ) converts each double-precision floating-point element of array .I x to a single-precision value, then encodes it as a sequence of 4 bytes in array .IR b . .PP Each .BI import_ T operation reverses the transformation of the corresponding .BI export_ T operation, converting an array of bytes containing a sequence of external representations into an array of values of the appropriate internal form. .PP Values are encoded in big-endian order (most significant byte first), with floating-point values represented in IEEE 32-bit or 64-bit form (again, most significant byte first). .SH SOURCE .B /libinterp/math.c .SH SEE ALSO .IR math-intro (2)