How to make my strchr work with unicode ?

[deep stag]

I'm trying to reproduce the strchr function, but it doesn't work with unicode.

{
    char    *ptr;

    ptr = (char *) s;
    if (c > 255)
        return (ptr);
    while (*ptr != c)
    {
        if (*ptr == '\0')
            return (NULL);
        ptr++;
    }
    return (ptr);
}


#include <stdio.h>
#include <string.h>

int main()
{
  const char s[] = "īœ˙ˀ˘¯ˇ¸¯.œ«‘––™ª•¡¶¢˜ˀ";
  printf("%s\n", strchr(s, 171));
  printf("%s\n", ft_strchr(s, 171));
  return (0);
}```

[sterile frigate]

When your question is answered use !solved to mark the question as resolved.

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[quartz ice]

;compile -Wall -Wextra ```c
#include <stddef.h>
char *ft_strchr(const char *s, int c)
{
char *ptr;

ptr = (char *) s;
if (c > 255)
    return (ptr);
while (*ptr != c)
{
    if (*ptr == '\0')
        return (NULL);
    ptr++;
}
return (ptr);

}

#include <stdio.h>
#include <string.h>

int main()
{
const char s[] = "īœ˙ˀ˘¯ˇ¸¯.œ«‘––™ª•¡¶¢˜ˀ";
printf("%s\n", strchr(s, 171));
printf("%s\n", ft_strchr(s, 171));
return (0);
}

[tulip ember]

Compilation successful

No output.

atzur#3938 | 230ms | c | x86-64 gcc 12.2 | godbolt.org

[quartz ice]

there's no unicode warnings?

well anyway, c chars are defined to be 1 byte

they can't fit a unicode character

[deep stag]

these are the outputs when i'm running the code

first one is the strchr function in the libc, second one is mine

[deep stag]

thats what i thought but i dont understand why the strchr function of the libc works with unicode 🥲

[stray shuttle]

https://en.cppreference.com/w/c/string/byte/strchr

first you need convert int c to char

[deep stag]

ok... that was it 💀

thank you really much aha

[stray shuttle]

😉

[deep stag]

!solved