Guardian C Library Calls Reference Manual

Summary of Library Header Files

Guardian TNS C Library Calls Reference Manual—128833 2-9

<mathh>

Here are the macros that describe the integral types short and unsigned short. Each

macro name is followed by its value and its meaning.

Here are the macros that describe the integral type long long. Each macro name is

followed by its value and its meaning.

The header localeh declares the functions setlocale and localeconv. In addition, the

header contains the locale category macro and the lconv structure.

At any time, a C program has a current “locale” that is a collection of information that

describes the conventions appropriate to some environment, or to some nationality,

culture and language. The setlocale function is the interface to the program’s locale. The

setlocale function causes the program’s current locale to change to another specified

locale. The standard C locale is the only supported locale in the Guardian environment.

The locale category macro defines the standard locale categories that can be changed in

any given locale. The locale categories are described under the setlocale function in

Section 3, “Reference to Library Calls.”

The localeconv function returns a pointer to a structure of type lconv that contains

information useful for formatting numeric and monetary information. The lconv

structure is described under the localeconv function in Section 3, “Reference to Library

Calls.”

<mathh>

The header mathh declares several mathematical functions and defines one object-like

macro.

The mathematical functions are:

acos asin atan atan2 ceil cos

cosh exp fabs floor fmod frexp

ldexp log log10 modf pow sin

sinh sqrt tan tanh

The macro is HUGE_VAL. The mathematical functions return HUGE_VAL when an

overflow occurs.

SHRT_MIN

-32768 Minimum value for a short variable

SHRT_MAX

32767 Maximum short value

USHRT_MAX

65535 Maximum unsigned short value

LLONG_BIT

64 Number of bits in a long long variable

LLONG_MIN

-9223372036854775807 Minimum long long value

LLONG_MAX

9223372036854775807 Maximum long long value