strlwr.c

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#include <precomp.h>

/*
 * @implemented
 */
char * CDECL _strlwr(char *x)
{
    char  *y=x;
    char ch, lower;

    while (*y) {
        ch = *y;
        lower = tolower(ch);
        if (ch != lower)
            *y = lower;
        y++;
    }
    return x;
}