Atmel CAVR-4 Manual De Usuario

CAVR-4

Part 2. Compiler reference

This section lists the header files. Header files may additionally contain target-specific 
definitions.

isxxx

toupper

tolower

ctype.h

The following table shows header files that do not contain any functions, but specify 
various definitions and data types:

This section lists the AVR–specific library functions defined in 

pgmspace.h

 that allow 

access to strings in flash. The 

_P

 functions exist in both the IAR CLIB Library and the 

IAR DLIB Library, but they allow access to strings in flash only. The 

_G

 functions use 

the 

_ _generic

 pointer instead, which means that they allow access to both flash and 

data memory. The 

_G

 functions are only available in the IAR DLIB Library.

assert.h

Assertions

ctype.h*

Character handling

iccbutl.h

Low-level routines

math.h

Mathematics

setjmp.h

Non-local jumps

stdarg.h

Variable arguments

stdio.h

Input/output

stdlib.h

General utilities

string.h

String handling

errno.h

Error return values

float.h

Limits and sizes of floating-point types

limits.h

Limits and sizes of integral types

stdbool.h 

Adds support for the bool data type in C

stddef.h

Common definitions including size_t, NULL, 

ptrdiff_t

, and offsetof