xref: /onnv-gate/usr/src/cmd/sgs/lex/common/yyless.c (revision 0:68f95e015346)
1*0Sstevel@tonic-gate /*
2*0Sstevel@tonic-gate  * CDDL HEADER START
3*0Sstevel@tonic-gate  *
4*0Sstevel@tonic-gate  * The contents of this file are subject to the terms of the
5*0Sstevel@tonic-gate  * Common Development and Distribution License, Version 1.0 only
6*0Sstevel@tonic-gate  * (the "License").  You may not use this file except in compliance
7*0Sstevel@tonic-gate  * with the License.
8*0Sstevel@tonic-gate  *
9*0Sstevel@tonic-gate  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10*0Sstevel@tonic-gate  * or http://www.opensolaris.org/os/licensing.
11*0Sstevel@tonic-gate  * See the License for the specific language governing permissions
12*0Sstevel@tonic-gate  * and limitations under the License.
13*0Sstevel@tonic-gate  *
14*0Sstevel@tonic-gate  * When distributing Covered Code, include this CDDL HEADER in each
15*0Sstevel@tonic-gate  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16*0Sstevel@tonic-gate  * If applicable, add the following below this CDDL HEADER, with the
17*0Sstevel@tonic-gate  * fields enclosed by brackets "[]" replaced with your own identifying
18*0Sstevel@tonic-gate  * information: Portions Copyright [yyyy] [name of copyright owner]
19*0Sstevel@tonic-gate  *
20*0Sstevel@tonic-gate  * CDDL HEADER END
21*0Sstevel@tonic-gate  */
22*0Sstevel@tonic-gate /*	Copyright (c) 1988 AT&T	*/
23*0Sstevel@tonic-gate /*	  All Rights Reserved  	*/
24*0Sstevel@tonic-gate 
25*0Sstevel@tonic-gate 
26*0Sstevel@tonic-gate /*
27*0Sstevel@tonic-gate  * Copyright 2004 Sun Microsystems, Inc.  All rights reserved.
28*0Sstevel@tonic-gate  * Use is subject to license terms.
29*0Sstevel@tonic-gate  */
30*0Sstevel@tonic-gate 
31*0Sstevel@tonic-gate #pragma ident	"%Z%%M%	%I%	%E% SMI"
32*0Sstevel@tonic-gate 
33*0Sstevel@tonic-gate #include <sys/euc.h>
34*0Sstevel@tonic-gate #include <stdlib.h>
35*0Sstevel@tonic-gate #include <widec.h>
36*0Sstevel@tonic-gate #include <limits.h>
37*0Sstevel@tonic-gate #include <inttypes.h>
38*0Sstevel@tonic-gate #include <unistd.h>
39*0Sstevel@tonic-gate 
40*0Sstevel@tonic-gate #pragma weak yyprevious
41*0Sstevel@tonic-gate extern int yyprevious;
42*0Sstevel@tonic-gate 
43*0Sstevel@tonic-gate #ifndef JLSLEX
44*0Sstevel@tonic-gate #define	CHR    char
45*0Sstevel@tonic-gate 
46*0Sstevel@tonic-gate #pragma weak yyinput
47*0Sstevel@tonic-gate #pragma weak yyleng
48*0Sstevel@tonic-gate #pragma weak yyunput
49*0Sstevel@tonic-gate #pragma weak yytext
50*0Sstevel@tonic-gate extern CHR yytext[];
51*0Sstevel@tonic-gate 
52*0Sstevel@tonic-gate #define	YYTEXT yytext
53*0Sstevel@tonic-gate #define	YYLENG yyleng
54*0Sstevel@tonic-gate #define	YYINPUT yyinput
55*0Sstevel@tonic-gate #define	YYUNPUT yyunput
56*0Sstevel@tonic-gate #define	YYOUTPUT yyoutput
57*0Sstevel@tonic-gate #endif
58*0Sstevel@tonic-gate 
59*0Sstevel@tonic-gate #ifdef WOPTION
60*0Sstevel@tonic-gate #define	CHR    wchar_t
61*0Sstevel@tonic-gate 
62*0Sstevel@tonic-gate #pragma weak yyinput
63*0Sstevel@tonic-gate #pragma weak yyleng
64*0Sstevel@tonic-gate #pragma weak yyunput
65*0Sstevel@tonic-gate #pragma weak yytext
66*0Sstevel@tonic-gate extern CHR yytext[];
67*0Sstevel@tonic-gate 
68*0Sstevel@tonic-gate #define	YYTEXT yytext
69*0Sstevel@tonic-gate #define	YYLENG yyleng
70*0Sstevel@tonic-gate #define	YYINPUT yyinput
71*0Sstevel@tonic-gate #define	YYUNPUT yyunput
72*0Sstevel@tonic-gate #define	YYOUTPUT yyoutput
73*0Sstevel@tonic-gate #endif
74*0Sstevel@tonic-gate 
75*0Sstevel@tonic-gate #ifdef EOPTION
76*0Sstevel@tonic-gate #define	CHR    wchar_t
77*0Sstevel@tonic-gate 
78*0Sstevel@tonic-gate #pragma weak yyleng
79*0Sstevel@tonic-gate extern int yyleng;
80*0Sstevel@tonic-gate #pragma weak yytext
81*0Sstevel@tonic-gate extern CHR yytext[];
82*0Sstevel@tonic-gate #pragma weak yywinput
83*0Sstevel@tonic-gate #pragma weak yywleng
84*0Sstevel@tonic-gate #pragma weak yywunput
85*0Sstevel@tonic-gate #pragma weak yywtext
86*0Sstevel@tonic-gate extern CHR yywtext[];
87*0Sstevel@tonic-gate 
88*0Sstevel@tonic-gate #define	YYTEXT yywtext
89*0Sstevel@tonic-gate #define	YYLENG yywleng
90*0Sstevel@tonic-gate #define	YYINPUT yywinput
91*0Sstevel@tonic-gate #define	YYUNPUT yywunput
92*0Sstevel@tonic-gate #define	YYOUTPUT yywoutput
93*0Sstevel@tonic-gate #endif
94*0Sstevel@tonic-gate 
95*0Sstevel@tonic-gate extern int YYLENG;
96*0Sstevel@tonic-gate #if defined(__STDC__)
97*0Sstevel@tonic-gate     extern void YYUNPUT(int);
98*0Sstevel@tonic-gate #endif
99*0Sstevel@tonic-gate 
100*0Sstevel@tonic-gate #if defined(__cplusplus) || defined(__STDC__)
101*0Sstevel@tonic-gate /* XCU4: type of yyless() changes to int */
102*0Sstevel@tonic-gate int
yyless(int x)103*0Sstevel@tonic-gate yyless(int x)
104*0Sstevel@tonic-gate #else
105*0Sstevel@tonic-gate yyless(x)
106*0Sstevel@tonic-gate int x;
107*0Sstevel@tonic-gate #endif
108*0Sstevel@tonic-gate {
109*0Sstevel@tonic-gate 	register CHR *lastch, *ptr;
110*0Sstevel@tonic-gate 
111*0Sstevel@tonic-gate 	lastch = YYTEXT+YYLENG;
112*0Sstevel@tonic-gate 	if (x >= 0 && x <= YYLENG)
113*0Sstevel@tonic-gate 		ptr = x + YYTEXT;
114*0Sstevel@tonic-gate 	else {
115*0Sstevel@tonic-gate #ifdef	_LP64
116*0Sstevel@tonic-gate 		static int seen = 0;
117*0Sstevel@tonic-gate 
118*0Sstevel@tonic-gate 		if (!seen) {
119*0Sstevel@tonic-gate 			(void) write(2,
120*0Sstevel@tonic-gate 				    "warning: yyless pointer arg truncated\n",
121*0Sstevel@tonic-gate 				    39);
122*0Sstevel@tonic-gate 			seen = 1;
123*0Sstevel@tonic-gate 		}
124*0Sstevel@tonic-gate #endif	/* _LP64 */
125*0Sstevel@tonic-gate 	/*
126*0Sstevel@tonic-gate 	 * The cast on the next line papers over an unconscionable nonportable
127*0Sstevel@tonic-gate 	 * glitch to allow the caller to hand the function a pointer instead of
128*0Sstevel@tonic-gate 	 * an integer and hope that it gets figured out properly.  But it's
129*0Sstevel@tonic-gate 	 * that way on all systems.
130*0Sstevel@tonic-gate 	 */
131*0Sstevel@tonic-gate 		ptr = (CHR *)(intptr_t)x;
132*0Sstevel@tonic-gate 	}
133*0Sstevel@tonic-gate 	while (lastch > ptr)
134*0Sstevel@tonic-gate 		YYUNPUT(*--lastch);
135*0Sstevel@tonic-gate 	*lastch = 0;
136*0Sstevel@tonic-gate 	if (ptr > YYTEXT)
137*0Sstevel@tonic-gate 		yyprevious = *--lastch;
138*0Sstevel@tonic-gate 	YYLENG = ptr-YYTEXT;
139*0Sstevel@tonic-gate #ifdef EOPTION
140*0Sstevel@tonic-gate 	yyleng = wcstombs((char *)yytext, YYTEXT, YYLENG*MB_LEN_MAX);
141*0Sstevel@tonic-gate #endif
142*0Sstevel@tonic-gate 	return (0);
143*0Sstevel@tonic-gate }
144