arith_lex.c

Android 一些工具

 *	The Regents of the University of California.  All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Kenneth Almquist.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#include <sys/cdefs.h>
#ifndef lint
#if 0
static char sccsid[] = "@(#)arith_lex.l	8.3 (Berkeley) 5/4/95";
#else
__RCSID("$NetBSD: arith_lex.l,v 1.12.6.1 2005/04/07 11:38:58 tron Exp $");
#endif
#endif /* not lint */

#include <unistd.h>
#include "arith.h"
#include "error.h"
#include "expand.h"
#include "var.h"

extern int yylval;
extern char *arith_buf, *arith_startbuf;
#undef YY_INPUT
#define YY_INPUT(buf,result,max) \
	result = (*buf = *arith_buf++) ? 1 : YY_NULL;
#define YY_NO_UNPUT
#line 526 "arith_lex.c"

#define INITIAL 0

#ifndef YY_NO_UNISTD_H
/* Special case for "unistd.h", since it is non-ANSI. We include it way
 * down here because we want the user's section 1 to have been scanned first.
 * The user has a chance to override it with an option.
 */
#include <unistd.h>
#endif

#ifndef YY_EXTRA_TYPE
#define YY_EXTRA_TYPE void *
#endif

/* Macros after this point can all be overridden by user definitions in
 * section 1.
 */

#ifndef YY_SKIP_YYWRAP
#ifdef __cplusplus
extern "C" int yywrap (void );
#else
extern int yywrap (void );
#endif
#endif

    static void yyunput (int c,char *buf_ptr  );
    
#ifndef yytext_ptr
static void yy_flex_strncpy (char *,yyconst char *,int );
#endif

#ifdef YY_NEED_STRLEN
static int yy_flex_strlen (yyconst char * );
#endif

#ifndef YY_NO_INPUT

#ifdef __cplusplus
static int yyinput (void );
#else
static int input (void );
#endif

#endif

/* Amount of stuff to slurp up with each read. */
#ifndef YY_READ_BUF_SIZE
#define YY_READ_BUF_SIZE 8192
#endif

/* Copy whatever the last rule matched to the standard output. */
#ifndef ECHO
/* This used to be an fputs(), but since the string might contain NUL's,
 * we now use fwrite().
 */
#define ECHO (void) fwrite( yytext, yyleng, 1, yyout )
#endif

/* Gets input and stuffs it into "buf".  number of characters read, or YY_NULL,
 * is returned in "result".
 */
#ifndef YY_INPUT
#define YY_INPUT(buf,result,max_size) \
	if ( YY_CURRENT_BUFFER_LVALUE->yy_is_interactive ) \
		{ \
		int c = '*'; \
		size_t n; \
		for ( n = 0; n < max_size && \
			     (c = getc( yyin )) != EOF && c != '\n'; ++n ) \
			buf[n] = (char) c; \
		if ( c == '\n' ) \
			buf[n++] = (char) c; \
		if ( c == EOF && ferror( yyin ) ) \
			YY_FATAL_ERROR( "input in flex scanner failed" ); \
		result = n; \
		} \
	else \
		{ \
		errno=0; \
		while ( (result = fread(buf, 1, max_size, yyin))==0 && ferror(yyin)) \
			{ \
			if( errno != EINTR) \
				{ \
				YY_FATAL_ERROR( "input in flex scanner failed" ); \
				break; \
				} \
			errno=0; \
			clearerr(yyin); \
			} \
		}\
\

#endif

/* No semi-colon after return; correct usage is to write "yyterminate();" -
 * we don't want an extra ';' after the "return" because that will cause
 * some compilers to complain about unreachable statements.
 */
#ifndef yyterminate
#define yyterminate() return YY_NULL
#endif

/* Number of entries by which start-condition stack grows. */
#ifndef YY_START_STACK_INCR
#define YY_START_STACK_INCR 25
#endif

/* Report a fatal error. */
#ifndef YY_FATAL_ERROR
#define YY_FATAL_ERROR(msg) yy_fatal_error( msg )
#endif

/* end tables serialization structures and prototypes */

/* Default declaration of generated scanner - a define so the user can
 * easily add parameters.
 */
#ifndef YY_DECL
#define YY_DECL_IS_OURS 1

extern int yylex (void);

#define YY_DECL int yylex (void)
#endif /* !YY_DECL */

/* Code executed at the beginning of each rule, after yytext and yyleng
 * have been set up.
 */
#ifndef YY_USER_ACTION
#define YY_USER_ACTION
#endif

/* Code executed at the end of each rule. */
#ifndef YY_BREAK
#define YY_BREAK break;
#endif

#define YY_RULE_SETUP \
	YY_USER_ACTION

/** The main scanner function which does all the work.
 */
YY_DECL
{
	register yy_state_type yy_current_state;
	register char *yy_cp, *yy_bp;
	register int yy_act;
    
#line 60 "arith_lex.l"

#line 679 "arith_lex.c"

	if ( (yy_init) )
		{
		(yy_init) = 0;

#ifdef YY_USER_INIT
		YY_USER_INIT;
#endif

		if ( ! (yy_start) )
			(yy_start) = 1;	/* first start state */

		if ( ! yyin )
			yyin = stdin;

		if ( ! yyout )
			yyout = stdout;

		if ( ! YY_CURRENT_BUFFER ) {
			yyensure_buffer_stack ();
			YY_CURRENT_BUFFER_LVALUE =
				yy_create_buffer(yyin,YY_BUF_SIZE );
		}

		yy_load_buffer_state( );
		}

	while ( 1 )		/* loops until end-of-file is reached */
		{
		yy_cp = (yy_c_buf_p);

		/* Support of yytext. */
		*yy_cp = (yy_hold_char);

		/* yy_bp points to the position in yy_ch_buf of the start of
		 * the current run.
		 */
		yy_bp = yy_cp;

		yy_current_state = (yy_start);
yy_match:
		do
			{
			register YY_CHAR yy_c = yy_ec[YY_SC_TO_UI(*yy_cp)];
			if ( yy_accept[yy_current_state] )
				{
				(yy_last_accepting_state) = yy_current_state;
				(yy_last_accepting_cpos) = yy_cp;
				}
			while ( yy_chk[yy_base[yy_current_state] + yy_c] != yy_current_state )
				{
				yy_current_state = (int) yy_def[yy_current_state];
				if ( yy_current_state >= 39 )
					yy_c = yy_meta[(unsigned int) yy_c];
				}
			yy_current_state = yy_nxt[yy_base[yy_current_state] + (unsigned int) yy_c];
			++yy_cp;
			}
		while ( yy_base[yy_current_state] != 48 );

yy_find_action:
		yy_act = yy_accept[yy_current_state];
		if ( yy_act == 0 )
			{ /* have to back up */
			yy_cp = (yy_last_accepting_cpos);
			yy_current_state = (yy_last_accepting_state);
			yy_act = yy_accept[yy_current_state];
			}

		YY_DO_BEFORE_ACTION;

do_action:	/* This label is used only to access EOF actions. */

		switch ( yy_act )
	{ /* beginning of action switch */
			case 0: /* must back up */
			/* undo the effects of YY_DO_BEFORE_ACTION */
			*yy_cp = (yy_hold_char);
			yy_cp = (yy_last_accepting_cpos);
			yy_current_state = (yy_last_accepting_state);
			goto yy_find_action;

case 1:
/* rule 1 can match eol */
YY_RULE_SETUP
#line 61 "arith_lex.l"
{ ; }
	YY_BREAK
case 2:
YY_RULE_SETUP
#line 62 "arith_lex.l"
{ yylval = strtol(yytext, 0, 0); return(ARITH_NUM); }
	YY_BREAK
case 3:
YY_RULE_SETUP
#line 63 "arith_lex.l"
{ yylval = strtol(yytext, 0, 0); return(ARITH_NUM); }
	YY_BREAK
case 4:
YY_RULE_SETUP
#line 64 "arith_lex.l"
{ yylval = strtol(yytext, 0, 0); return(ARITH_NUM); }
	YY_BREAK
case 5:
YY_RULE_SETUP
#line 65 "arith_lex.l"
{ char *v = lookupvar(yytext);
			if (v) {
				yylval = strtol(v, &v, 0);
				if (*v == 0)
					return ARITH_NUM;
			}
			error("arith: syntax error: \"%s\"", arith_startbuf);
		}
	YY_BREAK
case 6:
YY_RULE_SETUP
#line 73 "arith_lex.l"
{ return(ARITH_LPAREN); }
	YY_BREAK
case 7:
YY_RULE_SETUP
#line 74 "arith_lex.l"
{ return(ARITH_RPAREN); }
	YY_BREAK
case 8:
YY_RULE_SETUP
#line 75 "arith_lex.l"
{ return(ARITH_OR); }
	YY_BREAK
case 9:
YY_RULE_SETUP
#line 76 "arith_lex.l"
{ return(ARITH_AND); }
	YY_BREAK
case 10:
YY_RULE_SETUP
#line 77 "arith_lex.l"
{ return(ARITH_BOR); }
	YY_BREAK
case 11:
YY_RULE_SETUP
#line 78 "arith_lex.l"
{ return(ARITH_BXOR); }
	YY_BREAK
case 12:
YY_RULE_SETUP
#line 79 "arith_lex.l"
{ return(ARITH_BAND); }
	YY_BREAK
case 13:
YY_RULE_SETUP
#line 80 "arith_lex.l"
{ return(ARITH_EQ); }
	YY_BREAK
case 14:
YY_RULE_SETUP
#line 81 "arith_lex.l"
{ return(ARITH_NE); }
	YY_BREAK
case 15:
YY_RULE_SETUP
#line 82 "arith_lex.l"
{ return(ARITH_GT); }
	YY_BREAK
case 16:
YY_RULE_SETUP
#line 83 "arith_lex.l"
{ return(ARITH_GE); }
	YY_BREAK
case 17:
YY_RULE_SETUP
#line 84 "arith_lex.l"
{ return(ARITH_LT); }
	YY_BREAK
case 18:
YY_RULE_SETUP
#line 85 "arith_lex.l"
{ return(ARITH_LE); }
	YY_BREAK
case 19:
YY_RULE_SETUP
#line 86 "arith_lex.l"
{ return(ARITH_LSHIFT); }
	YY_BREAK
case 20:
YY_RULE_SETUP
#line 87 "arith_lex.l"
{ return(ARITH_RSHIFT); }
	YY_BREAK
case 21:
YY_RULE_SETUP
#line 88 "arith_lex.l"
{ return(ARITH_MUL); }
	YY_BREAK
case 22:
YY_RULE_SETUP
#line 89 "arith_lex.l"
{ return(ARITH_DIV); }
	YY_BREAK
case 23:
YY_RULE_SETUP
#line 90 "arith_lex.l"
{ return(ARITH_REM); }
	YY_BREAK
case 24:
YY_RULE_SETUP
#line 91 "arith_lex.l"
{ return(ARITH_ADD); }
	YY_BREAK
case 25:
YY_RULE_SETUP
#line 92 "arith_lex.l"
{ return(ARITH_SUB); }
	YY_BREAK
case 26:
YY_RULE_SETUP
#line 93 "arith_lex.l"
{ return(ARITH_BNOT); }
	YY_BREAK
case 27:
YY_RULE_SETUP
#line 94 "arith_lex.l"
{ return(ARITH_NOT); }
	YY_BREAK
case 28:
YY_RULE_SETUP
#line 95 "arith_lex.l"
{ error("arith: syntax error: \"%s\"", arith_startbuf); }
	YY_BREAK
case 29:
YY_RULE_SETUP
#line 96 "arith_lex.l"
ECHO;
	YY_BREAK
#line 915 "arith_lex.c"
case YY_STATE_EOF(INITIAL):
	yyterminate();

	case YY_END_OF_BUFFER:
		{
		/* Amount of text matched not including the EOB char. */
		int yy_amount_of_matched_text = (int) (yy_cp - (yytext_ptr)) - 1;

		/* Undo the effects of YY_DO_BEFORE_ACTION. */
		*yy_cp = (yy_hold_char);
		YY_RESTORE_YY_MORE_OFFSET

		if ( YY_CURRENT_BUFFER_LVALUE->yy_buffer_status == YY_BUFFER_NEW )
			{
			/* We're scanning a new file or input source.  It's
			 * possible that this happened because the user
			 * just pointed yyin at a new source and called
			 * yylex().  If so, then we have to assure
			 * consistency between YY_CURRENT_BUFFER and our
			 * globals.  Here is the right place to do so, because
			 * this is the first action (other than possibly a
			 * back-up) that will match for the new input source.
			 */
			(yy_n_chars) = YY_CURRENT_BUFFER_LVALUE->yy_n_chars;
			YY_CURRENT_BUFFER_LVALUE->yy_input_file = yyin;
			YY_CURRENT_BUFFER_LVALUE->yy_buffer_status = YY_BUFFER_NORMAL;
			}

		/* Note that here we test for yy_c_buf_p "<=" to the position
		 * of the first EOB in the buffer, since yy_c_buf_p will
		 * already have been incremented past the NUL character
		 * (since all states make transitions on EOB to the