24 #define uchar(c)        ((unsigned char)(c))  macro
75     luaL_addchar(&b, tolower(uchar(s[i])));  in str_lower()
88     luaL_addchar(&b, toupper(uchar(s[i])));  in str_upper()
120     lua_pushinteger(L, uchar(s[posi+i-1]));  in str_byte()
132     luaL_argcheck(L, uchar(c) == c, i, "invalid value");  in str_char()
133     luaL_addchar(&b, uchar(c));  in str_char()
254       if (match_class(c, uchar(*p)))  in matchbracketclass()
259       if (uchar(*(p-2)) <= c && c <= uchar(*p))  in matchbracketclass()
262     else if (uchar(*p) == c) return sig;  in matchbracketclass()
271     case L_ESC: return match_class(c, uchar(*(p+1)));  in singlematch()
273     default:  return (uchar(*p) == c);  in singlematch()
304   while ((s+i)<ms->src_end && singlematch(uchar(*(s+i)), p, ep))  in max_expand()
322     else if (s<ms->src_end && singlematch(uchar(*s), p, ep))  in min_expand()
392           if (matchbracketclass(uchar(previous), p, ep-1) ||  in match()
393              !matchbracketclass(uchar(*s), p, ep-1)) return NULL;  in match()
397           if (isdigit(uchar(*(p+1)))) {  /* capture results (%0-%9)? */  in match()
398             s = match_capture(ms, s, uchar(*(p+1)));  in match()
416       int m = s<ms->src_end && singlematch(uchar(*s), p, ep);  in match()
599       if (!isdigit(uchar(news[i])))  in add_s()
730   if (isdigit(uchar(*p))) p++;  /* skip width */  in scanformat()
731   if (isdigit(uchar(*p))) p++;  /* (2 digits at most) */  in scanformat()
734     if (isdigit(uchar(*p))) p++;  /* skip precision */  in scanformat()
735     if (isdigit(uchar(*p))) p++;  /* (2 digits at most) */  in scanformat()
737   if (isdigit(uchar(*p)))  in scanformat()