isascii()
Test a character to see if it's a 7-bit ASCII character
Synopsis:
#include <ctype.h>
int isascii( int c );
Arguments:
- c
- The character you want to test.
Library:
libc
Use the -l c option to qcc to link against this library. This library is usually included automatically.
Description:
The isascii() function tests for an ASCII character (in the range 0 to 127).
Returns:
Nonzero if c is an ASCII character; otherwise, zero.
Examples:
#include <stdio.h> #include <stdlib.h> #include <ctype.h> char the_chars[] = { 'A', 0x80, 'Z' }; #define SIZE sizeof( the_chars ) / sizeof( char ) int main( void ) { int i; for( i = 0; i < SIZE; i++ ) { if( isascii( the_chars[i] ) ) { printf( "Char %c is an ASCII character\n", the_chars[i] ); } else { printf( "Char %c is not an ASCII character\n", the_chars[i] ); } } return EXIT_SUCCESS; }
produces the output:
Char A is an ASCII character Char is not an ASCII character Char Z is an ASCII character
Classification:
Safety: | |
---|---|
Cancellation point | No |
Interrupt handler | Yes |
Signal handler | Yes |
Thread | Yes |