<errno.h>
#define EDOM
<#if expression>
#define EILSEQ
<#if expression>
#define ERANGE
<#if expression>
#define errno
<int modifiable lvalue>
Include the standard header <errno.h>
to test the value stored in
errno
by certain library functions. At program startup, the value stored
is zero. Library functions store only values greater than zero.
Any library function can alter the value stored, but
only those cases where a library function is explicitly
required to store a value are documented here.
To test whether a library function stores a value in
errno,
the program should store the value zero there immediately before
it calls the library function. An implementation can define additional
macros in this standard header that you can test for equality with
the value stored. All these additional macros have
names that begin with E.
EDOM
#define EDOM <#if expression>
The macro yields the value stored in
errno on a domain error.
EILSEQ
#define EILSEQ <#if expression>
The macro yields the value stored in
errno on an invalid
multibyte sequence.
ERANGE
#define ERANGE <#if expression>
The macro yields the value stored in
errno on a range error.
errno
#define errno <int modifiable lvalue>
The macro designates an object that is assigned a value greater than zero on certain library errors.
See also the Table of Contents and the Index.
Copyright © 1989-1996 by P.J. Plauger and Jim Brodie. All rights reserved.