#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <string.h>

/*
 * Return a pointer to the first occurrence of c (converted to char) in s,
 * or NULL when absent. The terminating NUL is part of the string, so
 * strchr(s, '\0') returns a pointer to it.
 */
char *
strchr(const char *s, int c) // NOLINT(bugprone-easily-swappable-parameters)
{
    const char cc = (char)c;

    for (;; s++)
    {
        if (*s == cc)
        {
            return (char *)s;
        }
        if (*s == '\0')
        {
            return NULL;
        }
    }
}

/*
 * Return a pointer to the last occurrence of c (converted to char) in s, or
 * NULL when absent. The terminating NUL is part of the string, so
 * strrchr(s, '\0') returns a pointer to it.
 */
char *
strrchr(const char *s, int c) // NOLINT(bugprone-easily-swappable-parameters)
{
    const char cc = (char)c;
    const char *last = NULL;

    for (;; s++)
    {
        if (*s == cc)
        {
            last = s;
        }
        if (*s == '\0')
        {
            return (char *)last;
        }
    }
}