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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 2 | pj | 1 | /* Project: OSLib |
| 2 | * Description: The OS Construction Kit |
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| 3 | * Date: 1.6.2000 |
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| 4 | * Idea by: Luca Abeni & Gerardo Lamastra |
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| 5 | * |
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| 6 | * OSLib is an SO project aimed at developing a common, easy-to-use |
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| 7 | * low-level infrastructure for developing OS kernels and Embedded |
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| 8 | * Applications; it partially derives from the HARTIK project but it |
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| 9 | * currently is independently developed. |
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| 10 | * |
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| 11 | * OSLib is distributed under GPL License, and some of its code has |
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| 12 | * been derived from the Linux kernel source; also some important |
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| 13 | * ideas come from studying the DJGPP go32 extender. |
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| 14 | * |
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| 15 | * We acknowledge the Linux Community, Free Software Foundation, |
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| 16 | * D.J. Delorie and all the other developers who believe in the |
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| 17 | * freedom of software and ideas. |
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| 18 | * |
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| 19 | * For legalese, check out the included GPL license. |
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| 20 | */ |
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| 21 | |||
| 22 | |||
| 23 | #include <ll/i386/cons.h> |
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| 24 | #include <ll/stdlib.h> |
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| 25 | #include <ll/sys/types.h> |
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| 26 | |||
| 27 | /* bytes for +Infinity on a 387 */ |
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| 28 | char __infinity[] = { 0, 0, 0, 0, 0, 0, 0xf0, 0x7f }; |
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| 29 | |||
| 30 | static int (*__errnumber)(void) = NULL; |
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| 31 | static int errno; |
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| 32 | int *__errnumber1() |
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| 33 | { |
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| 34 | if (__errnumber == NULL) { |
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| 35 | return &errno; |
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| 36 | } |
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| 37 | |||
| 38 | return (void *)__errnumber(); |
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| 39 | } |
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| 40 | |||
| 41 | void seterrnumber(int (*e)(void)) |
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| 42 | { |
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| 43 | __errnumber = e; |
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| 44 | } |
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| 45 | |||
| 46 | int isnan(double d) |
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| 47 | { |
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| 48 | register struct IEEEdp { |
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| 49 | u_int manl : 32; |
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| 50 | u_int manh : 20; |
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| 51 | u_int exp : 11; |
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| 52 | u_int sign : 1; |
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| 53 | } *p = (struct IEEEdp *)&d; |
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| 54 | |||
| 55 | return(p->exp == 2047 && (p->manh || p->manl)); |
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| 56 | } |
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| 57 | |||
| 58 | /* By Luca.... The write stub */ |
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| 59 | int write(int a, char *b, int c) |
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| 60 | { |
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| 61 | b[c] = 0; |
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| 62 | cputs(b); |
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| 63 | return c; |
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| 64 | } |