blob: 1fdfbecf982619b84ca08cd9c0701674227a6f4c (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
|
#pragma force_top_level
#pragma include_only_once
/* errno.h: ANSI 'C' (X3J11 Oct 88) library header, section 4.1.3 */
/* Copyright (C) Codemist Ltd., 1988 */
/* Copyright (C) Advanced Risc Machines Ltd., 1991 */
/* version 1 */
#ifndef __errno_h
#define __errno_h
#ifndef errno
# define errno __errno
extern volatile int errno;
/*
* expands to a modifiable lvalue that has type volatile int, the value of
* which is set to a positive error code by several library functions. It is
* initialised to zero at program startup, but is never set to zero by any
* library function. The value of errno may be set to nonzero by a library
* function call whether or not there is an error, provided the use of errno
* is not documented in the description of the function in the Standard.
*/
#endif
#define EDOM 1
/*
* if a domain error occurs (an input argument is outside the domain over
* which the mathematical function is defined) the integer expression errno
* acquires the value of the macro EDOM and HUGE_VAL is returned. EDOM may
* be used by non-mathematical functions.
*/
#define ERANGE 2
/*
* a range error occurs if the result of a function can not be represented
* as a double value. If the result overflows (the magnitude of the result
* is so large that it cannot be represented in an object of the specified
* type), the function returns the value of the macro HUGE_VAL, with the
* same sign as the correct value of the function; the integer expression
* errno acquires the value of the macro ERANGE. If the result underflows
* (the magnitude of the result is so small that it cannot be represented
* in an object of the specified type), the function returns zero; the
* integer expression errno acquires the value of the macro ERANGE. ERANGE
* may be used by non-mathematical functions.
*/
#define ESIGNUM 3
#endif
/* end of errno.h */
|
