Zilog Z80380 - Manual (Page 72)

Library Functions Run Time Environment
4–8 UM004001-COR1103
int isspace ( int c );
int isupper ( int c );
int isxdigit ( int c );
Each function in the is family tests a given integer value, returning a nonzero value if the
integer satisfies the test condition and 0 if it does not. The ASCII character set is assumed.
The is functions and their test conditions are listed below:
Parameter Description
c Interger to be tested