Datasheet

The C and C++ Libraries
ARM DUI 0067D Copyright © 1999-2001 ARM Limited. All rights reserved. 4-101
The bufsize parameter specifies the number of characters of buffer that the function can
write into, including the terminating null.
<stdio.h> is an ANSI header file, but the function is not allowed by the ANSI C library
standard. It is therefore not available if you use the compilers with the
-strict option.
Syntax
int vsnprintf(char *buffer, size_t bufsize, const char *format, va_list ap)
4.14.6 lldiv()
The
lldiv functiondivides two long long integers and returns both the quotient and the
remainder. It is the
long long equivalent of the ANSI function ldiv . The return type
lldiv_t is a structure containing two long long members, called quot and rem .
<stdlib.h> is an ANSI header file, but the function is not allowed by the ANSI C library
standard. It is therefore not available if you use the compilers with the
-strict option.
Syntax
lldiv_tlldiv(long long num, long long denom)
4.14.7 llabs()
The
llabs() returns the absolute value of its input. It is the long long equivalent of the
ANSI function
labs .
<stdlib.h> is an ANSI header file, but the function is not allowed by the ANSI C library
standard. It is therefore not available if you use the compilers with the
-strict option.
Syntax
longlong llabs(long long num)
4.14.8 alloca()
The
alloca() function allocates local storage in a function. It returns a pointer to size
bytes of memory, or
NULL if not enough memory was available. The default
implementation returns an 8-byte aligned block of memory.
Memory returned from
alloca() must never be passed to free() . Instead, the memory
is deallocated automatically when the function that called
alloca() returns.