Zilog Z80380 - Manual (Page 73)

UM004001-COR1103 4–9
Run Time Environment Library Functions
Function Test Condition
isalnum Alphanumeric (‘A’-‘Z’, ‘a’-‘z’, or ‘0’-‘9’)
isalpha Letter (‘A’-‘Z’ or ‘a’-‘z’)
iscntrl Control character (0x00 - 0x1F or 0x7F)
isdigit Digit (‘0’-‘9’)
isgraph Printable character except space (‘ ‘)
islower Lowercase letter (‘a’-‘z’)
isprint Printable character (0x20 - 0x7E)
ispunct Punctuation character
isspace White-space character (0x09 - 0x0D or 0x20)
isupper Uppercase letter (‘A’-‘Z’)
isxdigit Hexadecimal digit (‘A’-‘F’,’a’-‘f’, or ‘0’-‘9’)
Return Value
These routines return a nonzero value if the integer satisfies the test condition and 0 if it does
not.
labs FUNCTION
Header file statement: #include <stdlib.h>
Syntax: long labs ( long n );
The labs function produces the absolute value of its long-integer argument n.
Return Value
The labs function returns the absolute value of its argument. There is no error returned.
Parameter Description
n Long-integer value