awk: simplify tests for operation class

Usually, an operation class has only one possible value of "info" word.
In this case, just compare the entire info word, do not bother
to mask OPCLSMASK bits.

(Example where this is not the case: OC_REPLACE for "<op>=")

function                                             old     new   delta
mk_splitter                                          106     100      -6
chain_group                                          616     610      -6
nextarg                                               40      32      -8
exec_builtin                                        1157    1149      -8
as_regex                                             111     103      -8
awk_split                                            553     543     -10
parse_expr                                           948     936     -12
awk_getline                                          656     642     -14
evaluate                                            3387    3343     -44
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/9 up/down: 0/-116)           Total: -116 bytes
Signed-off-by: NDenys Vlasenko <vda.linux@googlemail.com>

editors/awk.c

@@ -432,7 +432,8 @@ static const char tokenlist[] ALIGN1 =
 static const uint32_t tokeninfo[] ALIGN4 = {
 	0,
 	0,
-	OC_REGEXP,
+#define TI_REGEXP OC_REGEXP
+	TI_REGEXP,
 	xS|'a',                  xS|'w',                  xS|'|',
 	OC_UNARY|xV|P(9)|'p',    OC_UNARY|xV|P(9)|'m',
 #define TI_PREINC (OC_UNARY|xV|P(9)|'P')
@@ -443,12 +444,17 @@ static const uint32_t tokeninfo[] ALIGN4 = {
 	OC_BINARY|NV|P(29)|'+',  OC_BINARY|NV|P(29)|'-',  OC_REPLACE|NV|P(74)|'&', OC_BINARY|NV|P(15)|'&',
 	OC_BINARY|NV|P(25)|'/',  OC_BINARY|NV|P(25)|'%',  OC_BINARY|NV|P(15)|'&',  OC_BINARY|NV|P(25)|'*',
 	OC_COMPARE|VV|P(39)|4,   OC_COMPARE|VV|P(39)|3,   OC_COMPARE|VV|P(39)|0,   OC_COMPARE|VV|P(39)|1,
-#define TI_LESS (OC_COMPARE|VV|P(39)|2)
+#define TI_LESS     (OC_COMPARE|VV|P(39)|2)
 	TI_LESS,                 OC_MATCH|Sx|P(45)|'!',   OC_MATCH|Sx|P(45)|'~',   OC_LAND|Vx|P(55),
-	OC_LOR|Vx|P(59),         OC_TERNARY|Vx|P(64)|'?', OC_COLON|xx|P(67)|':',
-	OC_IN|SV|P(49), /* TC_IN */
-	OC_COMMA|SS|P(80),
-	OC_PGETLINE|SV|P(37),
+#define TI_TERNARY  (OC_TERNARY|Vx|P(64)|'?')
+#define TI_COLON    (OC_COLON|xx|P(67)|':')
+	OC_LOR|Vx|P(59),         TI_TERNARY,              TI_COLON,
+#define TI_IN       (OC_IN|SV|P(49))
+	TI_IN,
+#define TI_COMMA    (OC_COMMA|SS|P(80))
+	TI_COMMA,
+#define TI_PGETLINE (OC_PGETLINE|SV|P(37))
+	TI_PGETLINE,
 	OC_UNARY|xV|P(19)|'+',   OC_UNARY|xV|P(19)|'-',   OC_UNARY|xV|P(19)|'!',
 	0, /* ] */
 	0,
@@ -456,7 +462,8 @@ static const uint32_t tokeninfo[] ALIGN4 = {
 	0,
 	0, /* \n */
 	ST_IF,        ST_DO,        ST_FOR,      OC_BREAK,
-	OC_CONTINUE,  OC_DELETE|Rx, OC_PRINT,
+#define TI_PRINT OC_PRINT
+	OC_CONTINUE,  OC_DELETE|Rx, TI_PRINT,
 	OC_PRINTF,    OC_NEXT,      OC_NEXTFILE,
 	OC_RETURN|Vx, OC_EXIT|Nx,
 	ST_WHILE,
@@ -465,8 +472,8 @@ static const uint32_t tokeninfo[] ALIGN4 = {
 //  Highest byte bit pattern: nn s3s2s1 v3v2v1
 //  nn - min. number of args, sN - resolve Nth arg to string, vN - resolve to var
 // OC_F's are builtins with zero or one argument.
-//  |Rx| enforces that arg is present for: system, close, cos, sin, exp, int, log, sqrt.
-//  Check for no args is present in builtins' code (not in this table): rand, systime.
+//  |Rx| enforces that arg is present for: system, close, cos, sin, exp, int, log, sqrt
+//  Check for no args is present in builtins' code (not in this table): rand, systime
 //  Have one _optional_ arg: fflush, srand, length
 #define OC_B   OC_BUILTIN
 #define OC_F   OC_FBLTIN
@@ -1310,7 +1317,7 @@ static node *new_node(uint32_t info)
 
 static void mk_re_node(const char *s, node *n, regex_t *re)
 {
-	n->info = OC_REGEXP;
+	n->info = TI_REGEXP;
 	n->l.re = re;
 	n->r.ire = re + 1;
 	xregcomp(re, s, REG_EXTENDED);
@@ -1360,12 +1367,13 @@ static node *parse_expr(uint32_t term_tc)
 			 * previous operators with higher priority */
 			vn = cn;
 			while (((t_info & PRIMASK) > (vn->a.n->info & PRIMASK2))
-			    || ((t_info == vn->info) && ((t_info & OPCLSMASK) == OC_COLON))
+			    || ((t_info == vn->info) && t_info == TI_COLON)
 			) {
 				vn = vn->a.n;
 				if (!vn->a.n) syntax_error(EMSG_UNEXP_TOKEN);
 			}
-			if ((t_info & OPCLSMASK) == OC_TERNARY)
+			if (t_info == TI_TERNARY)
+//TODO: why?
 				t_info += P(6);
 			cn = vn->a.n->r.n = new_node(t_info);
 			cn->a.n = vn->a.n;
@@ -1378,7 +1386,7 @@ static node *parse_expr(uint32_t term_tc)
 // awk 'BEGIN { length("qwe") = 1 }'
 // awk 'BEGIN { (1+1) += 3 }'
 				expected_tc = TS_OPERAND | TS_UOPPRE | TC_REGEXP;
-				if ((t_info & OPCLSMASK) == OC_PGETLINE) {
+				if (t_info == TI_PGETLINE) {
 					/* it's a pipe */
 					next_token(TC_GETLINE);
 					/* give maximum priority to this pipe */
@@ -1630,7 +1638,7 @@ static void chain_group(void)
 		next_token(TC_LPAREN);
 		n2 = parse_expr(TC_SEMICOL | TC_RPAREN);
 		if (t_tclass & TC_RPAREN) {	/* for-in */
-			if (!n2 || (n2->info & OPCLSMASK) != OC_IN)
+			if (!n2 || n2->info != TI_IN)
 				syntax_error(EMSG_UNEXP_TOKEN);
 			n = chain_node(OC_WALKINIT | VV);
 			n->l.n = n2->l.n;
@@ -1834,7 +1842,7 @@ static node *mk_splitter(const char *s, tsplitter *spl)
 	re = &spl->re[0];
 	ire = &spl->re[1];
 	n = &spl->n;
-	if ((n->info & OPCLSMASK) == OC_REGEXP) {
+	if (n->info == TI_REGEXP) {
 		regfree(re);
 		regfree(ire); // TODO: nuke ire, use re+1?
 	}
@@ -1858,7 +1866,7 @@ static regex_t *as_regex(node *op, regex_t *preg)
 	int cflags;
 	const char *s;
 
-	if ((op->info & OPCLSMASK) == OC_REGEXP) {
+	if (op->info == TI_REGEXP) {
 		return icase ? op->r.ire : op->l.re;
 	}
 
@@ -1968,7 +1976,7 @@ static int awk_split(const char *s, node *spl, char **slist)
 		c[2] = '\n';
 
 	n = 0;
-	if ((spl->info & OPCLSMASK) == OC_REGEXP) {  /* regex split */
+	if (spl->info == TI_REGEXP) {  /* regex split */
 		if (!*s)
 			return n; /* "": zero fields */
 		n++; /* at least one field will be there */
@@ -2135,7 +2143,7 @@ static node *nextarg(node **pn)
 	node *n;
 
 	n = *pn;
-	if (n && (n->info & OPCLSMASK) == OC_COMMA) {
+	if (n && n->info == TI_COMMA) {
 		*pn = n->r.n;
 		n = n->l.n;
 	} else {
@@ -2229,7 +2237,7 @@ static int awk_getline(rstream *rsm, var *v)
 		so = eo = p;
 		r = 1;
 		if (p > 0) {
-			if ((rsplitter.n.info & OPCLSMASK) == OC_REGEXP) {
+			if (rsplitter.n.info == TI_REGEXP) {
 				if (regexec(icase ? rsplitter.n.r.ire : rsplitter.n.l.re,
 							b, 1, pmatch, 0) == 0) {
 					so = pmatch[0].rm_so;
@@ -2575,8 +2583,8 @@ static NOINLINE var *exec_builtin(node *op, var *res)
 		char *s, *s1;
 
 		if (nargs > 2) {
-			spl = (an[2]->info & OPCLSMASK) == OC_REGEXP ?
-				an[2] : mk_splitter(getvar_s(evaluate(an[2], TMPVAR2)), &tspl);
+			spl = (an[2]->info == TI_REGEXP) ? an[2]
+				: mk_splitter(getvar_s(evaluate(an[2], TMPVAR2)), &tspl);
 		} else {
 			spl = &fsplitter.n;
 		}
@@ -2860,7 +2868,7 @@ static var *evaluate(node *op, var *res)
 		/* test pattern */
 		case XC( OC_TEST ):
 			debug_printf_eval("TEST\n");
-			if ((op1->info & OPCLSMASK) == OC_COMMA) {
+			if (op1->info == TI_COMMA) {
 				/* it's range pattern */
 				if ((opinfo & OF_CHECKED) || ptest(op1->l.n)) {
 					op->info |= OF_CHECKED;
@@ -2921,7 +2929,7 @@ static var *evaluate(node *op, var *res)
 				F = rsm->F;
 			}
 
-			if ((opinfo & OPCLSMASK) == OC_PRINT) {
+			if (opinfo == TI_PRINT) {
 				if (!op1) {
 					fputs(getvar_s(intvar[F0]), F);
 				} else {
@@ -2940,7 +2948,7 @@ static var *evaluate(node *op, var *res)
 					}
 				}
 				fputs(getvar_s(intvar[ORS]), F);
-			} else {	/* OC_PRINTF */
+			} else {	/* PRINTF */
 				char *s = awk_printf(op1, &len);
 #if ENABLE_FEATURE_AWK_GNU_EXTENSIONS
 				fwrite(s, len, 1, F);
@@ -3064,7 +3072,7 @@ static var *evaluate(node *op, var *res)
 
 		case XC( OC_TERNARY ):
 			debug_printf_eval("TERNARY\n");
-			if ((op->r.n->info & OPCLSMASK) != OC_COLON)
+			if (op->r.n->info != TI_COLON)
 				syntax_error(EMSG_POSSIBLE_ERROR);
 			res = evaluate(istrue(L.v) ? op->r.n->l.n : op->r.n->r.n, res);
 			break;
@@ -3122,7 +3130,7 @@ static var *evaluate(node *op, var *res)
 			if (op1) {
 				rsm = newfile(L.s);
 				if (!rsm->F) {
-					if ((opinfo & OPCLSMASK) == OC_PGETLINE) {
+					if (opinfo == TI_PGETLINE) {
 						rsm->F = popen(L.s, "r");
 						rsm->is_pipe = TRUE;
 					} else {
@@ -3158,7 +3166,7 @@ static var *evaluate(node *op, var *res)
 			double R_d = R_d; /* for compiler */
 			debug_printf_eval("FBLTIN\n");
 
-			if (op1 && (op1->info & OPCLSMASK) == OC_COMMA)
+			if (op1 && op1->info == TI_COMMA)
 				/* Simple builtins take one arg maximum */
 				syntax_error("Too many arguments");
 
@@ -3358,7 +3366,7 @@ static var *evaluate(node *op, var *res)
 		case XC( OC_COMMA ): {
 			const char *sep = "";
 			debug_printf_eval("COMMA\n");
-			if ((opinfo & OPCLSMASK) == OC_COMMA)
+			if (opinfo == TI_COMMA)
 				sep = getvar_s(intvar[SUBSEP]);
 			setvar_p(res, xasprintf("%s%s%s", L.s, sep, R.s));
 			break;