Zilog Z80380 Manual de usuario descargar pdf (Pagina 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

Long-integer value

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Zilog Z80380 Manual de usuario Pagina 73