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- #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. */
- /* Copyright (C) Acorn Computers Ltd. 1991, 1992 */
- /* version 2.00 */
-
- #ifndef __errno_h
- #define __errno_h
-
- #ifndef errno
- #ifdef __cplusplus
- extern "C" {
- #define _VOLATILE
- #else
- #define _VOLATILE volatile
- #endif
-
- #ifdef SYSTEM_STATICS
- extern _VOLATILE int *__errno;
- #define errno *__errno
- #elif defined(_DLL)
- extern int *_dll_errno(void);
- #define errno (*_dll_errno())
- #else
- extern _VOLATILE int __errno;
- #define errno __errno
- #endif
-
- #ifdef __cplusplus
- }
- #endif
-
- #undef _VOLATILE
-
- #endif
-
- /*
- * 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.
- */
-
- #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 */
-