~mdw / mLib / blame
| Commit | Line | Data |
|---|---|---|
| adec5584 MW |
1 | .\" -*-nroff-*- |
| 2 | .TH linreg 3 "9 March 2024" "Straylight/Edgeware" "mLib utilities library" | |
| 3 | .\" @NANPN | |
| 4 | .\" @INFP | |
| 5 | .\" @NEGP | |
| 6 | . | |
| 7 | .SH SYNOPSIS | |
| 8 | .nf | |
| 9 | .B "#include <mLib/maths.h>" | |
| 10 | ||
| 11 | .BI "int NANP(" floatish " " x ); | |
| 12 | .BI "int INFP(" floatish " " x ); | |
| 13 | .BI "int NEGP(" floatish " " x ); | |
| 14 | .fi | |
| 15 | . | |
| 16 | .SH DESCRIPTION | |
| 17 | The | |
| 18 | .B <mLib/maths.h> | |
| 19 | header declares some minor low-level floating-point utilities. | |
| 20 | These are mostly redundant with C99, | |
| 21 | but provided for portability to older platforms. | |
| 22 | .PP | |
| 23 | The | |
| 24 | .B NANP | |
| 25 | macro returns nonzero if its argument is not-a-number. | |
| 26 | The | |
| 27 | .B INFP | |
| 28 | macro returns nonzero if its argument is infinite. | |
| 29 | The | |
| 30 | .B NEGP | |
| 31 | macro returns nonzero if its argument is negative; | |
| 32 | on IEEE\ 754 platforms with sufficient support, | |
| 33 | it will correctly detect negative zero. | |
| 34 | . | |
| 35 | .SH AUTHOR | |
| 36 | Mark Wooding, <mdw@distorted.org.uk> |