scan.c

早期freebsd实现

static yy_state_type yy_last_accepting_state;
static char *yy_last_accepting_cpos;

/* The intent behind this definition is that it'll catch
 * any uses of REJECT which lex missed.
 */
#define REJECT reject_used_but_not_detected
#define yymore() yymore_used_but_not_detected
#define YY_MORE_ADJ 0
char *yytext;
# line 1 "scan.l"
/* scan.l - scanner for flex input */
# line 4 "scan.l"
/*-
 * Copyright (c) 1990 The Regents of the University of California.
 * All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Vern Paxson.
 * 
 * The United States Government has rights in this work pursuant
 * to contract no. DE-AC03-76SF00098 between the United States
 * Department of Energy and the University of California.
 *
 * Redistribution and use in source and binary forms are permitted provided
 * that: (1) source distributions retain this entire copyright notice and
 * comment, and (2) distributions including binaries display the following
 * acknowledgement:  ``This product includes software developed by the
 * University of California, Berkeley and its contributors'' in the
 * documentation or other materials provided with the distribution and in
 * all advertising materials mentioning features or use of this software.
 * 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 ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
 * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 */

/* $Header: scan.l,v 1.2 94/01/04 14:33:09 vern Exp $ */

#include "flexdef.h"
#include "parse.h"

#define ACTION_ECHO add_action( yytext )
#define MARK_END_OF_PROLOG mark_prolog();

#define YY_DECL \
	int flexscan()

#define RETURNCHAR \
	yylval = (unsigned char) yytext[0]; \
	return CHAR;

#define RETURNNAME \
	strcpy( nmstr, yytext ); \
	return NAME;

#define PUT_BACK_STRING(str, start) \
	for ( i = strlen( str ) - 1; i >= start; --i ) \
		unput((str)[i])

#define CHECK_REJECT(str) \
	if ( all_upper( str ) ) \
		reject = true;

#define CHECK_YYMORE(str) \
	if ( all_lower( str ) ) \
		yymore_used = true;

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

#ifdef YY_MALLOC_DECL
YY_MALLOC_DECL
#else
#if __STDC__
#ifndef __cplusplus
#include <stdlib.h>
#endif
#else
/* Just try to get by without declaring the routines.  This will fail
 * miserably on non-ANSI systems for which sizeof(size_t) != sizeof(int)
 * or sizeof(void*) != sizeof(int).
 */
#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->yy_is_interactive ) \
		{ \
		int c = getc( yyin ); \
		result = c == EOF ? 0 : 1; \
		buf[0] = (char) c; \
		} \
	else if ( ((result = fread( buf, 1, max_size, yyin )) == 0) \
		  && ferror( yyin ) ) \
		YY_FATAL_ERROR( "input in lex scanner failed" );
#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

/* Default declaration of generated scanner - a define so the user can
 * easily add parameters.
 */
#ifndef YY_DECL
#define YY_DECL int yylex YY_PROTO(( void ))
#endif

/* 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

YY_DECL
	{
	register yy_state_type yy_current_state;
	register char *yy_cp, *yy_bp;
	register int yy_act;

# line 82 "scan.l"

	static int bracelevel, didadef, indented_code, checking_used;

	int doing_codeblock = false;
	int i;
	Char nmdef[MAXLINE], myesc();



	if ( yy_init )
		{
#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 )
			yy_init_buffer( yy_current_buffer, yyin );
		else
			yy_current_buffer =
				yy_create_buffer( yyin, YY_BUF_SIZE );

		yy_load_buffer_state();

		yy_init = 0;
		}

	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;
		if ( yy_bp[-1] == '\n' )
			++yy_current_state;
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 >= 408 )
					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] != 1615 );

yy_find_action:
		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:
YY_USER_ACTION
# line 90 "scan.l"
indented_code = true; BEGIN(CODEBLOCK);
	YY_BREAK
case 2:
YY_USER_ACTION
# line 91 "scan.l"
ACTION_ECHO; BEGIN(C_COMMENT);
	YY_BREAK
case 3:
YY_USER_ACTION
# line 92 "scan.l"
return SCDECL;
	YY_BREAK
case 4:
YY_USER_ACTION
# line 93 "scan.l"
return XSCDECL;
	YY_BREAK
case 5:
YY_USER_ACTION
# line 94 "scan.l"
{
			++linenum;
			line_directive_out( (FILE *) 0 );
			indented_code = false;
			BEGIN(CODEBLOCK);
			}
	YY_BREAK
case 6:
YY_USER_ACTION
# line 101 "scan.l"
return WHITESPACE;
	YY_BREAK
case 7:
YY_USER_ACTION
# line 103 "scan.l"
{
			sectnum = 2;
			bracelevel = 0;
			mark_defs1();
			line_directive_out( (FILE *) 0 );
			BEGIN(SECT2PROLOG);
			return SECTEND;
			}
	YY_BREAK
case 8:
YY_USER_ACTION
# line 112 "scan.l"
{
			if ( lex_compat )
				warn( "%pointer incompatible with -l option" );
			else
				yytext_is_array = false;
			++linenum;
			}
	YY_BREAK
case 9:
YY_USER_ACTION
# line 119 "scan.l"
{
			if ( C_plus_plus )
				warn( "%array incompatible with -+ option" );
			else
				yytext_is_array = true;
			++linenum;
			}
	YY_BREAK
case 10:
YY_USER_ACTION
# line 127 "scan.l"
{
			warn( "%used/%unused have been deprecated" );
			checking_used = REALLY_USED; BEGIN(USED_LIST);
			}
	YY_BREAK
case 11:
YY_USER_ACTION
# line 131 "scan.l"
{
			warn( "%used/%unused have been deprecated" );
			checking_used = REALLY_NOT_USED; BEGIN(USED_LIST);
			}
	YY_BREAK
case 12:
YY_USER_ACTION
# line 137 "scan.l"
++linenum;	/* ignore */
	YY_BREAK
case 13:
YY_USER_ACTION
# line 139 "scan.l"
synerr( "unrecognized '%' directive" );
	YY_BREAK
case 14:
YY_USER_ACTION
# line 141 "scan.l"
{
			strcpy( nmstr, yytext );
			didadef = false;
			BEGIN(PICKUPDEF);
			}
	YY_BREAK
case 15:
YY_USER_ACTION
# line 147 "scan.l"
RETURNNAME;
	YY_BREAK
case 16:
YY_USER_ACTION
# line 148 "scan.l"
++linenum; /* allows blank lines in section 1 */
	YY_BREAK
case 17:
YY_USER_ACTION
# line 149 "scan.l"
++linenum; return '\n';
	YY_BREAK
case 18:
YY_USER_ACTION
# line 152 "scan.l"
ACTION_ECHO; BEGIN(INITIAL);
	YY_BREAK
case 19:
YY_USER_ACTION
# line 153 "scan.l"
++linenum; ACTION_ECHO; BEGIN(INITIAL);
	YY_BREAK
case 20:
YY_USER_ACTION
# line 154 "scan.l"
ACTION_ECHO;
	YY_BREAK
case 21:
YY_USER_ACTION
# line 155 "scan.l"
ACTION_ECHO;
	YY_BREAK
case 22:
YY_USER_ACTION
# line 156 "scan.l"
++linenum; ACTION_ECHO;
	YY_BREAK
case 23:
YY_USER_ACTION
# line 159 "scan.l"
++linenum; BEGIN(INITIAL);
	YY_BREAK
case 24:
YY_USER_ACTION
# line 160 "scan.l"
ACTION_ECHO; CHECK_REJECT(yytext);
	YY_BREAK
case 25:
YY_USER_ACTION
# line 161 "scan.l"
ACTION_ECHO; CHECK_YYMORE(yytext);
	YY_BREAK
case 26:
YY_USER_ACTION
# line 162 "scan.l"
ACTION_ECHO;
	YY_BREAK
case 27:
YY_USER_ACTION
# line 163 "scan.l"
{
			++linenum;
			ACTION_ECHO;
			if ( indented_code )
				BEGIN(INITIAL);
			}
	YY_BREAK