Zilog ZUSBOPTS - Manual (Page 429)

UM017105-0511 Standard Header Files
Zilog Developer Studio II – ZNEO™
User Manual
401
The following additional nearest integer functions are provided:
Nonlocal Jumps
The < setjmp.h > header declares two functions and one type for bypassing the normal
function call and return discipline.
Type
Functions
Variable Arguments
The < stdarg.h > header declares a type and a function and defines two macros for
advancing through a list of arguments whose number and types are not known to the called
function when it is translated.
A function can be called with a variable number of arguments of varying types. A Func-
tion Definitions parameter list contains one or more parameters. The rightmost parameter
plays a special role in the access mechanism and is designated parmN in this description.
Type
float ceilf(float x); Finds integer ceiling of x.
float fabsf(float x); Finds absolute value of x.
float floorf(float x); Finds largest integer less than or equal to x.
float fmodf(float x,float y); Finds floating-point remainder of x/y.
jmp_buf An array type suitable for holding the information required to restore a
calling environment.
int setjmp(jmp_buf env); Saves a stack environment.
void longjmp(jmp_buf env, int val); Restores a saved stack environ-
ment.
va_list An array type suitable for holding information required by the macro
va_arg and the function va_end. The called function declares a variable
(referred to as ap in this section) having type va_list. The variable ap can
be passed as an argument to another function.