windows-nt-4.0/private/rpc/midlnew/tools/flex/fastflex.skl

/* A lexical scanner generated by flex */

#define FLEX_FAST_SKEL

#include "fastskeldef.h"

%% section 1 code and the definition of YY_TRANS_OFFSET_TYPE, if needed, go here

#ifndef FLEX_FULL_TABLE
    /* struct for yy_transition */
    struct yy_trans_info
	{
	/* v is a verify for a transition. */
	short v;

	/* In cases where its sister v *is* a "yes, there is a transition",
         * n is* the offset (in records) to the next state.  In most cases
         * where there is no transition, the value of n is irrelevant.  If n
         * is the -1th  record of a state, though, then n is the action
	 * number for that state
	 */
	YY_TRANS_OFFSET_TYPE n;
	};
#endif

%% data tables for DFA go here

/* these declarations have to come after the section 1 code or lint gets
 * confused about whether the variables are used
 */
FILE *yyin = stdin, *yyout = stdout;

/* these variables are all declared out here so that section 3 code can
 * manipulate them
 */
static char *yy_c_buf_p;	/* points to current character in buffer */
static char *yy_b_buf_p;	/* points to start of current scan */
static int yy_init = 1;	/* whether we need to initialize */
static int yy_start;	/* start state number */

/* true when we've seen an EOF for the current input file */
static int yy_eof_has_been_seen;

static int yy_n_chars;		/* number of characters read into yy_ch_buf */

/* yy_ch_buf has to be 2 characters longer than YY_BUF_SIZE because we need
 * to put in 2 end-of-buffer characters (this is explained where it is
 * done) at the end of yy_ch_buf
 */
static char yy_ch_buf[YY_BUF_SIZE + 2];

/* yy_hold_char holds the character lost when yytext is formed */
static char yy_hold_char;
char *yytext;
static int yyleng;	/* length of yytext */

static YY_CS_TYPE yy_last_accepting_state;
static char *yy_last_accepting_cpos;

static YY_CS_TYPE yy_get_previous_state();
static int yy_get_next_buffer();

#define FLEX_USES_BACKTRACKING

#ifdef FLEX_USES_BACKTRACKING
#    ifdef FLEX_FULL_TABLE
#	define YY_BACKTRACKING_ACTION(cur_state,cur_buf_p) \
		if ( l[cur_state] ) \
			{ \
			yy_last_accepting_state = cur_state; \
			yy_last_accepting_cpos = cur_buf_p; \
			}
#    else
#	define YY_BACKTRACKING_ACTION(cur_state,cur_buf_p) \
		if ( cur_state[-1].n ) \
			{ \
			yy_last_accepting_state = cur_state; \
			yy_last_accepting_cpos = cur_buf_p; \
			}
#    endif
#else
#    define YY_BACKTRACKING_ACTION(cur_state,cur_buf_p)
#endif

YY_DECL
    {
    register YY_CS_TYPE yy_current_state;
    register int yy_c;
    register struct yy_trans_info *yy_trans_info;
    register int yy_act;

%% user's declarations go here

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

new_file:
	/* this is where we enter upon encountering and end-of-file and
	 * yywrap() indicating that we should continue processing
	 */

	/* we put in the '\n' and start reading from [1] so that an
	 * initial match-at-newline will be true.
	 */

	yy_ch_buf[0] = '\n';
	yy_n_chars = 1;

	/* we always need two end-of-buffer characters.  The first causes
	 * a transition to the end-of-buffer state.  The second causes
	 * a jam in that state.
	 */
	yy_ch_buf[yy_n_chars] = YY_END_OF_BUFFER_CHAR;
	yy_ch_buf[yy_n_chars + 1] = YY_END_OF_BUFFER_CHAR;

	yy_eof_has_been_seen = 0;

	YY_FAST_INIT;
	yy_init = 0;
	}

    while ( 1 )		/* loops until end-of-file is reached */
	{
	/* support of yytext and yyleng */
	YY_DO_BEFORE_SCAN;

	/* yy_b_buf_p points to the position in yy_ch_buf of the start of the
	 * current run.
	 */
	yy_b_buf_p = yy_c_buf_p;

        YY_FIND_START_STATE( yy_current_state );

        YY_FIND_NEXT_MATCH;

	YY_DO_BEFORE_ACTION;

/* we need this label to process the very last action (right before the end of
 * the file)
 */
do_action:
	YY_FIND_ACTION( yy_act );

#ifdef FLEX_DEBUG
	fprintf( stderr, "--accepting rule #%d\n", yy_act );
#endif
	switch ( yy_act )
	    {
%% actions go here

	    case YY_BACK_TRACK:
		YY_DO_BEFORE_SCAN; /* undo the effects of YY_DO_BEFORE_ACTION */
		yy_c_buf_p = yy_last_accepting_cpos + 1;
		yy_current_state = yy_last_accepting_state;
		YY_DO_BEFORE_ACTION;
		goto do_action;

	    case YY_NEW_FILE:
		break; /* begin reading from new file */

	    case YY_DO_DEFAULT:
		/* we have to eat up one character and recompute yytext and
		 * yyleng
		 */
		YY_DO_BEFORE_SCAN; /* undo the effects of YY_DO_BEFORE_ACTION */
		++yy_c_buf_p;
		YY_DO_BEFORE_ACTION;
		YY_DEFAULT_ACTION;
		break;

	    case YY_END_OF_BUFFER:
		YY_DO_BEFORE_SCAN; /* undo the effects of YY_DO_BEFORE_ACTION */

		switch ( yy_get_next_buffer() )
		    {
		    case EOB_ACT_END_OF_FILE:
			{
			if ( yywrap() )
			    {
			    /* note: because we've taken care in
			     * yy_get_next_buffer() to have set up yy_b_buf_p,
			     * we can now set up yy_c_buf_p so that if some
			     * total hoser (like flex itself) wants
			     * to call the scanner after we return the
			     * YY_NULL, it'll still work - another YY_NULL
 			     * will get returned.
			     */
			    yy_c_buf_p = yy_b_buf_p;
			    return ( YY_NULL );
			    }

			else
			    goto new_file;
			}
			break;

		    case EOB_ACT_RESTART_SCAN:
			yy_c_buf_p = yy_b_buf_p;

			YY_DO_BEFORE_RESTART;
			break;

		    case EOB_ACT_LAST_MATCH:
			yy_c_buf_p = &yy_ch_buf[yy_n_chars];

			yy_current_state = yy_get_previous_state();

			YY_DO_BEFORE_ACTION;

			goto do_action;
		    }
		break;

	    default:
		printf( "action # %d\n", yy_act );
		YY_FATAL_ERROR( "fatal flex scanner internal error" );
	    }
	}
    }


/* yy_get_next_buffer - try to read in new buffer
 *
 * synopsis
 *     int yy_get_next_buffer();
 *     
 * returns a code representing an action
 *     EOB_ACT_LAST_MATCH - 
 *     EOB_ACT_RESTART_SCAN - restart the scanner
 *     EOB_ACT_END_OF_FILE - end of file
 */

static int yy_get_next_buffer()

    {
    if ( yy_c_buf_p != &yy_ch_buf[yy_n_chars + 1] )
	{
	YY_FATAL_ERROR( "NULL in input" );
	/*NOTREACHED*/
	}

    else
	{ /* try to read more data */
	register char *dest = yy_ch_buf;
	register char *source = yy_b_buf_p - 1; /* copy prev. char, too */
	register int number_to_move, i;
	int ret_val;
	
	/* first move last chars to start of buffer */
	number_to_move = yy_c_buf_p - yy_b_buf_p;

	for ( i = 0; i < number_to_move; ++i )
	    *(dest++) = *(source++);

	if ( yy_eof_has_been_seen )
	    /* don't do the read, it's not guaranteed to return an EOF,
	     * just force an EOF
	     */
	    yy_n_chars = 0;

	else
	    /* read in more data */
	    YY_INPUT( (&yy_ch_buf[number_to_move]), yy_n_chars,
		      YY_BUF_SIZE - number_to_move - 1 );

	if ( yy_n_chars == 0 )
	    {
	    if ( number_to_move == 1 )
		ret_val = EOB_ACT_END_OF_FILE;
	    else
		ret_val = EOB_ACT_LAST_MATCH;

	    yy_eof_has_been_seen = 1;
	    }

	else
	    ret_val = EOB_ACT_RESTART_SCAN;

	yy_n_chars += number_to_move;
	yy_ch_buf[yy_n_chars] = YY_END_OF_BUFFER_CHAR;
	yy_ch_buf[yy_n_chars + 1] = YY_END_OF_BUFFER_CHAR;

	/* yy_b_buf_p begins at the second character in
	 * yy_ch_buf; the first character is the one which
	 * preceded it before reading in the latest buffer;
	 * it needs to be kept around in case it's a
	 * newline, so yy_get_previous_state() will have
	 * with '^' rules active
	 */

	yy_b_buf_p = &yy_ch_buf[1];

	return ( ret_val );
	}
    }


/* yy_get_previous_state - get the state just before the eob char was reached
 *
 * synopsis
 *     YY_CS_TYPE yy_get_previous_state();
 */

static YY_CS_TYPE yy_get_previous_state()

    {
    register YY_CS_TYPE yy_cur_state;
    register char *yy_temp_char_ptr;

    YY_FIND_START_STATE( yy_cur_state );

    for ( yy_temp_char_ptr = yy_b_buf_p; yy_temp_char_ptr < yy_c_buf_p; )
	YY_GET_NEXT_STATE;

    return ( yy_cur_state );
    }


static unput( c )
int c;

    {
    YY_DO_BEFORE_SCAN; /* undo effects of setting up yytext */

    if ( yy_c_buf_p < yy_ch_buf + 2 )
	{ /* need to shift things up to make room */
	register int number_to_move = yy_n_chars + 2; /* +2 for EOB chars */
	register char *dest = &yy_ch_buf[YY_BUF_SIZE + 2];
	register char *source = &yy_ch_buf[number_to_move];

	while ( source > yy_ch_buf )
	    *--dest = *--source;

	yy_c_buf_p += dest - source;
	yy_b_buf_p += dest - source;

	if ( yy_c_buf_p < yy_ch_buf + 2 )
	    YY_FATAL_ERROR( "flex scanner push-back overflow" );
	}

    if ( yy_c_buf_p > yy_b_buf_p && yy_c_buf_p[-1] == '\n' )
	yy_c_buf_p[-2] = '\n';

    *--yy_c_buf_p = c;

    YY_DO_BEFORE_ACTION; /* set up yytext again */
    }


static int input()

    {
    int c;

    YY_DO_BEFORE_SCAN;

    if ( *yy_c_buf_p == YY_END_OF_BUFFER_CHAR )
	{ /* need more input */
	yy_b_buf_p = yy_c_buf_p;
	++yy_c_buf_p;

	switch ( yy_get_next_buffer() )
	    {
	    /* this code, unfortunately, is somewhat redundant with
	     * that above
	     */
	    case EOB_ACT_END_OF_FILE:
		{
		if ( yywrap() )
		    {
		    yy_c_buf_p = yy_b_buf_p;
		    return ( EOF );
		    }

		yy_ch_buf[0] = '\n';
		yy_n_chars = 1;
		yy_ch_buf[yy_n_chars] = YY_END_OF_BUFFER_CHAR;
		yy_ch_buf[yy_n_chars + 1] = YY_END_OF_BUFFER_CHAR;
		yy_eof_has_been_seen = 0;

		YY_FAST_INIT;

		return ( input() );
		}
		break;

	    case EOB_ACT_RESTART_SCAN:
		yy_c_buf_p = yy_b_buf_p;
		break;

	    case EOB_ACT_LAST_MATCH:
		YY_FATAL_ERROR( "unexpected last match in input()" );
	    }
	}

    c = *yy_c_buf_p++;

    YY_DO_BEFORE_RESTART;

    return ( c );
    }