Find non-ascii characters from a UTF-8 string
- by user10607
I need to find the non-ASCII characters from a UTF-8 string.
my understanding:
UTF-8 is a superset of character encoding in which 0-127 are ascii characters.
So if in a UTF-8 string , a characters value is Not between 0-127, then it is not a ascii character , right? Please correct me if i'm wrong here.
On the above understanding i have written following code in C :
Note:
I'm using the Ubuntu gcc compiler to run C code
utf-string is xvab c
long i;
char arr[] = "xvab c";
printf("length : %lu \n", sizeof(arr));
for(i=0; i<sizeof(arr); i++){
char ch = arr[i];
if (isascii(ch))
printf("Ascii character %c\n", ch);
else
printf("Not ascii character %c\n", ch);
}
Which prints the output like:
length : 9
Ascii character x
Not ascii character
Not ascii character ?
Not ascii character ?
Ascii character a
Ascii character b
Ascii character
Ascii character c
Ascii character
To naked eye length of xvab c seems to be 6, but in code it is coming as 9 ?
Correct answer for the xvab c is 1 ...i.e it has only 1 non-ascii character , but in above output it is coming as 3 (times Not ascii character).
How can i find the non-ascii character from UTF-8 string, correctly.
Please guide on the subject.
