fatfs/src/ff.c
static int chk_chr (const char* str, int chr)	/* NZ:contained, ZR:not contained */
{
	while (*str && *str != chr) str++;
	return *str;
}
/* Check if chr is contained in the string */
Check if chr is contained in the string
Check if chr is contained in the string
static int chk_chr (const char* str, int chr)	
{
	while (*str && *str != chr) str++;
	return *str;
}
static int chk_chr ( const char * str , int chr ) { while ( * str && * str != chr ) str ++ ; return * str ; }
Check if chr is contained in the string
Check if chr is contained in the string
/* NZ:contained, ZR:not contained */