MacWorld 1995 November/Macworld Nov ’95.toast/Developers/Flex 2.5.2/flex-2.5.2/flex.skl

Text File | 1995-06-29 | 28.1 KB | 1,230 lines | [TEXT/MPS ]

/***
 *
 * A lexical scanner generated by flex
 * CEH - flex.skl modified by Christopher E. Hyde, 95-06-29 from v2.85 95/04/24
 *
 ***/

#define FLEX_SCANNER
#define YY_FLEX_MAJOR_VERSION 2
#define YY_FLEX_MINOR_VERSION 5

#ifdef macintosh
#pragma segment FlexScanner
#endif

%-
#include <stdio.h>
%*

// cfront 1.2 defines "c_plusplus" instead of "__cplusplus"
#if defined(c_plusplus) && !defined(__cplusplus)
#define __cplusplus
#endif

%+
#define    YY_C            "C"
#define    YY_DECLARE(t)    t yyFlexLexer::
%-
#define    YY_C
#define    YY_DECLARE(t)    static t
#define    istream            FILE
%*

#define YY_USE_PROTOS    // Use prototypes in function declarations.
#define YY_USE_CONST    // The "const" storage-class-modifier is valid.

#ifdef __cplusplus

#include <stdlib.h>
%+
class istream;
#include <stream.h>    // CEH
%*
//#include <unistd.h>

#else    // ! __cplusplus

#if __STDC__

#endif    // __STDC__
#endif    // ! __cplusplus

#ifdef YY_USE_CONST
#define yyconst const
#else
#define yyconst
#endif


#ifdef YY_USE_PROTOS
#define YY_PROTO(proto) proto
#else
#define YY_PROTO(proto) ()
#endif

// Returned upon end-of-file.
#define YY_NULL    0

/* Promotes a possibly negative, possibly signed char to an unsigned
 * integer for use as an array index.  If the signed char is negative,
 * we want to instead treat it as an 8-bit unsigned char, hence the
 * double cast.
 */
#define YY_SC_TO_UI(c) ((unsigned int) (unsigned char) c)

/* Enter a start condition.  This macro really ought to take a parameter,
 * but we do it the disgusting crufty way forced on us by the ()-less
 * definition of BEGIN.
 */
#define BEGIN yy_start = 1 + 2 *

/* Translate the current start state into a value that can be later handed
 * to BEGIN to return to the state.  The YYSTATE alias is for lex
 * compatibility.
 */
#define YY_START ((yy_start - 1) / 2)
#define YYSTATE YY_START

// Action number for EOF rule of a given start state.
#define YY_STATE_EOF(state) (YY_END_OF_BUFFER + state + 1)

// Special action meaning "start processing a new file".
#define YY_NEW_FILE yyrestart(yyin)

#define YY_END_OF_BUFFER_CHAR 0

// Size of default input buffer.
#define YY_BUF_SIZE 16384

typedef struct yy_buffer_state* YY_BUFFER_STATE;

extern int yyleng;
%-
extern FILE *yyin, *yyout;
%*

#define EOB_ACT_CONTINUE_SCAN    0
#define EOB_ACT_END_OF_FILE        1
#define EOB_ACT_LAST_MATCH        2

/* The funky do-while in the following #define is used to turn the definition
 * int a single C statement (which needs a semi-colon terminator).  This
 * avoids problems with code like:
 *
 *     if (condition_holds)
 *        yyless(5);
 *    else
 *        do_something_else();
 *
 * Prior to using the do-while the compiler would get upset at the
 * "else" because it interpreted the "if" statement as being all
 * done when it reached the ';' after the yyless() call.
 */

/* Return all but the first 'n' matched characters back to the input stream. */

#define yyless(n)    do { \
        /* Undo effects of setting up yytext. */ \
        *yy_cp = yy_hold_char; \
        yy_c_buf_p = yy_cp = yy_bp + n - YY_MORE_ADJ; \
        YY_DO_BEFORE_ACTION; /* set up yytext again */ \
    } while (0)

#define unput(c)    yyunput(c, yytext_ptr)

/* The following is because we cannot portably get our hands on size_t
 * (without autoconf's help, which isn't available because we want
 * flex-generated scanners to compile on their own).
 */
typedef unsigned int yy_size_t;


struct yy_buffer_state {
    istream* yy_input_file;
    char*    yy_ch_buf;        // input buffer
    char*    yy_buf_pos;        // current position in input buffer

    // Size of input buffer in bytes, not including room for EOB characters.
    yy_size_t yy_buf_size;

    // Number of characters read into yy_ch_buf, not including EOB characters.
    int yy_n_chars;

    /* Whether we "own" the buffer - i.e., we know we created it, and
     * can realloc() it to grow it, and should free() it to delete it.
     */
    int yy_is_our_buffer;

    /* Whether this is an "interactive" input source; if so, and if we're
     * using stdio for input, then we want to use getc() instead of
     * fread(), to make sure we stop fetching input after each newline.
     */
    int yy_is_interactive;

    /* Whether we're considered to be at the beginning of a line.
     * If so, '^' rules will be active on the next match, otherwise not.
     */
    int yy_at_bol;

    // Whether to try to fill the input buffer when we reach the end of it.
    int yy_fill_buffer;

    int yy_buffer_status;
#define YY_BUFFER_NEW        0
#define YY_BUFFER_NORMAL    1
    /* When an EOF's been seen but there's still some text to process
     * then we mark the buffer as YY_EOF_PENDING, to indicate that we
     * shouldn't try reading from the input source any more.  We might
     * still have a bunch of tokens to match, though, because of
     * possible backing-up.
     *
     * When we actually see the EOF, we change the status to "new"
     * (via yyrestart()), so that the user can continue scanning by
     * just pointing yyin at a new input file.
     */
#define YY_BUFFER_EOF_PENDING 2
};

%- Standard (non-C++) definition
static YY_BUFFER_STATE yy_current_buffer = 0;
%*

/* We provide macros for accessing buffer states in case in the
 * future we want to put the buffer states in a more general
 * "scanner state".
 */
#define YY_CURRENT_BUFFER yy_current_buffer


%- Standard (non-C++) definition
// yy_hold_char holds the character lost when yytext is formed.
static char yy_hold_char;

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


int yyleng;

// Points to current character in buffer.
static char* yy_c_buf_p = (char*) 0;
static int yy_init    = 1;    // whether we need to initialize
static int yy_start    = 0;    // start state number

/* Flag which is used to allow yywrap()'s to do buffer switches
 * instead of setting up a fresh yyin.  A bit of a hack ...
 */
static int yy_did_buffer_switch_on_eof;

void yyrestart                    (istream* input_file);

void yy_switch_to_buffer        (YY_BUFFER_STATE new_buffer);
void yy_load_buffer_state        (void);
YY_BUFFER_STATE yy_create_buffer(istream* file, int size);
void yy_delete_buffer            (YY_BUFFER_STATE b);
void yy_init_buffer                (YY_BUFFER_STATE b, istream* file);
void yy_flush_buffer            (YY_BUFFER_STATE b);
#define YY_FLUSH_BUFFER yy_flush_buffer(yy_current_buffer)

YY_BUFFER_STATE yy_scan_buffer    (char* base, yy_size_t size);
YY_BUFFER_STATE yy_scan_string    (yyconst char* str);
YY_BUFFER_STATE yy_scan_bytes    (yyconst char* bytes, int len);
%*

static void*    yy_flex_alloc    (yy_size_t);
static void*    yy_flex_realloc    (void*, yy_size_t);
static void        yy_flex_free    (void*);

#define yy_new_buffer    yy_create_buffer

#define yy_set_interactive(is_interactive)    { \
    if ( ! yy_current_buffer ) \
        yy_current_buffer = yy_create_buffer( yyin, YY_BUF_SIZE ); \
    yy_current_buffer->yy_is_interactive = is_interactive; \
    }

#define yy_set_bol(at_bol)    { \
    if ( ! yy_current_buffer ) \
        yy_current_buffer = yy_create_buffer( yyin, YY_BUF_SIZE ); \
    yy_current_buffer->yy_at_bol = at_bol; \
    }

#define YY_AT_BOL() (yy_current_buffer->yy_at_bol)

%% yytext/yyin/yyout/yy_state_type/yylineno etc. def's & init go here

%- Standard (non-C++) definition
static yy_state_type    yy_get_previous_state    (void);
static yy_state_type    yy_try_NUL_trans        (yy_state_type current_state);
static int                yy_get_next_buffer        (void);
static void                yy_fatal_error            (yyconst char msg[]);
%*

/* Done after the current pattern has been matched and before the
 * corresponding action - sets up yytext.
 */
#define    YY_DO_BEFORE_ACTION    yytext_ptr = yy_bp; \
%% code to fiddle yytext and yyleng for yymore() goes here
    yy_hold_char = *yy_cp; \
    *yy_cp = '\0'; \
%% code to copy yytext_ptr to yytext[] goes here, if %array
    yy_c_buf_p = yy_cp;

%% data tables for the DFA and the user's section 1 definitions go here

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

#ifndef YY_SKIP_YYWRAP
extern YY_C int yywrap (void);
#endif

%-
#ifndef YY_NO_UNPUT
static void yyunput (int c, char* buf_ptr);
#endif
%*

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

#ifndef YY_NO_INPUT
static int yyinput (void);
#endif

#if YY_STACK_USED
static int yy_start_stack_ptr    = 0;
static int yy_start_stack_depth    = 0;
static int *yy_start_stack        = 0;
#ifndef YY_NO_PUSH_STATE
static void yy_push_state    (int new_state);
#endif
#ifndef YY_NO_POP_STATE
static void yy_pop_state    (void);
#endif
#ifndef YY_NO_TOP_STATE
static int yy_top_state        (void);
#endif

#else
#define YY_NO_PUSH_STATE    1
#define YY_NO_POP_STATE        1
#define YY_NO_TOP_STATE        1
#endif

#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
%- Standard (non-C++) definition
/* 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)
%+ C++ definition
#define ECHO    LexerOutput(yytext, yyleng)
%*
#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) \
%% fread()/read() definition of YY_INPUT goes here unless we're doing C++
%+ C++ definition
    if ( (result = LexerInput( (char *) buf, max_size )) < 0 ) \
        YY_FATAL_ERROR( "input in flex 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)
%+
#define YY_FATAL_ERROR(msg) LexerError(msg)
%*
#endif

/* Default declaration of generated scanner - a define so the user can
 * easily add parameters.
 */
#ifndef YY_DECL
#define YY_DECL    YY_DECLARE(int) yylex()
#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_RULE_SETUP definition goes here

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

%% user's declarations go here

    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;
%+
            yyin = &cin;
%*

        if ( ! yyout )
%-
            yyout = stdout;
%+
            yyout = &cout;
%*

        if ( ! yy_current_buffer )
            yy_current_buffer = yy_create_buffer( yyin, YY_BUF_SIZE );

        yy_load_buffer_state();
    }

    while (1) {        // loops until end-of-file is reached
%% yymore()-related code goes here
        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;

%% code to set up and find next match goes here

yy_find_action:
%% code to find the action number goes here

        YY_DO_BEFORE_ACTION;

%% code for yylineno update goes here

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

%% debug code goes here

        switch (yy_act) { // beginning of action switch
%% actions go here

    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;

        if ( yy_current_buffer->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->yy_n_chars;
            yy_current_buffer->yy_input_file = yyin;
            yy_current_buffer->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
         * end-of-buffer state).  Contrast this with the test
         * in yyinput().
         */
        if ( yy_c_buf_p <= &yy_current_buffer->yy_ch_buf[yy_n_chars] ) {
            // This was really a NUL.
            yy_state_type yy_next_state;

            yy_c_buf_p = yytext_ptr + yy_amount_of_matched_text;

            yy_current_state = yy_get_previous_state();

            /* Okay, we're now positioned to make the NUL
             * transition.  We couldn't have
             * yy_get_previous_state() go ahead and do it
             * for us because it doesn't know how to deal
             * with the possibility of jamming (and we don't
             * want to build jamming into it because then it
             * will run more slowly).
             */

            yy_next_state = yy_try_NUL_trans( yy_current_state );

            yy_bp = yytext_ptr + YY_MORE_ADJ;

            if ( yy_next_state ) {
                /* Consume the NUL. */
                yy_cp = ++yy_c_buf_p;
                yy_current_state = yy_next_state;
                goto yy_match;
            } else {
%% code to do back-up for compressed tables and set up yy_cp goes here
                goto yy_find_action;
            }
        } else
            switch ( yy_get_next_buffer() ) {
            case EOB_ACT_END_OF_FILE: {
                yy_did_buffer_switch_on_eof = 0;

                if ( yywrap() ) {
                    /* Note: because we've taken care in
                     * yy_get_next_buffer() to have set up
                     * yytext, 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 = yytext_ptr + YY_MORE_ADJ;

                    yy_act = YY_STATE_EOF(YY_START);
                    goto do_action;
                } else {
                    if ( ! yy_did_buffer_switch_on_eof )
                        YY_NEW_FILE;
                }
                break;
            }

            case EOB_ACT_CONTINUE_SCAN:
                yy_c_buf_p =
                    yytext_ptr + yy_amount_of_matched_text;

                yy_current_state = yy_get_previous_state();

                yy_cp = yy_c_buf_p;
                yy_bp = yytext_ptr + YY_MORE_ADJ;
                goto yy_match;

            case EOB_ACT_LAST_MATCH:
                yy_c_buf_p =
                &yy_current_buffer->yy_ch_buf[yy_n_chars];

                yy_current_state = yy_get_previous_state();

                yy_cp = yy_c_buf_p;
                yy_bp = yytext_ptr + YY_MORE_ADJ;
                goto yy_find_action;
            }
        break;
    }

        default:
            YY_FATAL_ERROR(    "fatal flex scanner internal error--no action found" );
        } // end of action switch
    } // end of scanning one token
} // end of yylex


%+
YY_DECLARE(;) yyFlexLexer (istream* arg_yyin, ostream* arg_yyout)
{
    yyin = arg_yyin;
    yyout = arg_yyout;
    yy_c_buf_p = 0;
    yy_init = 1;
    yy_start = 0;
    yy_flex_debug = 0;
    yylineno = 1;    // this will only get updated if %option yylineno

    yy_did_buffer_switch_on_eof = 0;

    yy_looking_for_trail_begin = 0;
    yy_more_flag = 0;
    yy_more_len = 0;

    yy_start_stack_ptr = yy_start_stack_depth = 0;
    yy_start_stack = 0;

    yy_current_buffer = 0;

#ifdef YY_USES_REJECT
    yy_state_buf = new yy_state_type[YY_BUF_SIZE + 2];
#else
    yy_state_buf = 0;
#endif
}


YY_DECLARE(;) ~yyFlexLexer (void)
{
    delete yy_state_buf;
    yy_delete_buffer( yy_current_buffer );
}


YY_DECLARE(void) switch_streams (istream* new_in, ostream* new_out)
{
    if (new_in) {
        yy_delete_buffer(yy_current_buffer);
        yy_switch_to_buffer(yy_create_buffer(new_in, YY_BUF_SIZE));
    }

    if (new_out)
        yyout = new_out;
}


YY_DECLARE(int) LexerInput (char* buf, int
#ifndef YY_INTERACTIVE
    max_size
#endif
)
{
    if (yyin->eof() || yyin->fail())
        return 0;

#ifdef YY_INTERACTIVE
    yyin->get(buf[0]);

    if (yyin->eof())
        return 0;

    if (yyin->bad())
        return -1;

    return 1;
#else
    (void) yyin->read(buf, max_size);

    return yyin->bad() ? -1 : yyin->gcount();
#endif
}


YY_DECLARE(void) LexerOutput (const char* buf, int size)
{
    (void) yyout->write(buf, size);
}
%*


/* yy_get_next_buffer - try to read in a new buffer
 *
 * Returns a code representing an action:
 *    EOB_ACT_LAST_MATCH -
 *    EOB_ACT_CONTINUE_SCAN - continue scanning from current position
 *    EOB_ACT_END_OF_FILE - end of file
 */

YY_DECLARE(int) yy_get_next_buffer (void)
{
    register char* dest = yy_current_buffer->yy_ch_buf;
    register char* source = yytext_ptr;
    register int number_to_move, i;
    int ret_val;

    if (yy_c_buf_p > &yy_current_buffer->yy_ch_buf[yy_n_chars + 1])
        YY_FATAL_ERROR("fatal flex scanner internal error--end of buffer missed");

    if (yy_current_buffer->yy_fill_buffer == 0) {
        // Don't try to fill the buffer, so this is an EOF.
        if (yy_c_buf_p - yytext_ptr - YY_MORE_ADJ == 1) {
            /* We matched a singled characater, the EOB, so
             * treat this as a final EOF.
             */
            return EOB_ACT_END_OF_FILE;
        }

        else {
            // We matched some text prior to the EOB, first process it.
            return EOB_ACT_LAST_MATCH;
        }
    }

    // Try to read more data.

    // First move last chars to start of buffer.
    number_to_move = (int) (yy_c_buf_p - yytext_ptr) - 1;

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

    if (yy_current_buffer->yy_buffer_status == YY_BUFFER_EOF_PENDING)
        /* don't do the read, it's not guaranteed to return an EOF,
         * just force an EOF
         */
        yy_n_chars = 0;
    else {
        int num_to_read = yy_current_buffer->yy_buf_size - number_to_move - 1;

        while (num_to_read <= 0) {
            // Not enough room in the buffer - grow it.
#ifdef YY_USES_REJECT
            YY_FATAL_ERROR(
            "input buffer overflow, can't enlarge buffer because scanner uses REJECT");
#else

            // just a shorter name for the current buffer
            YY_BUFFER_STATE b = yy_current_buffer;

            int yy_c_buf_p_offset = (int) (yy_c_buf_p - b->yy_ch_buf);

            if (b->yy_is_our_buffer) {
                int new_size = b->yy_buf_size * 2;

                if (new_size <= 0)
                    b->yy_buf_size += b->yy_buf_size / 8;
                else
                    b->yy_buf_size *= 2;

                b->yy_ch_buf = (char*)
                    // Include room in for 2 EOB chars.
                    yy_flex_realloc((void*) b->yy_ch_buf, b->yy_buf_size + 2);
            } else
                // Can't grow it, we don't own it.
                b->yy_ch_buf = 0;

            if (!b->yy_ch_buf)
                YY_FATAL_ERROR("fatal error - scanner input buffer overflow");

            yy_c_buf_p = &b->yy_ch_buf[yy_c_buf_p_offset];

            num_to_read = yy_current_buffer->yy_buf_size - number_to_move - 1;
#endif
        }

        if (num_to_read > YY_READ_BUF_SIZE)
            num_to_read = YY_READ_BUF_SIZE;

        // Read in more data.
        YY_INPUT((&yy_current_buffer->yy_ch_buf[number_to_move]),
                    yy_n_chars, num_to_read);
    }

    if (yy_n_chars == 0) {
        if (number_to_move == YY_MORE_ADJ) {
            ret_val = EOB_ACT_END_OF_FILE;
            yyrestart(yyin);
        } else {
            ret_val = EOB_ACT_LAST_MATCH;
            yy_current_buffer->yy_buffer_status = YY_BUFFER_EOF_PENDING;
        }
    } else
        ret_val = EOB_ACT_CONTINUE_SCAN;

    yy_n_chars += number_to_move;
    yy_current_buffer->yy_ch_buf[yy_n_chars] = YY_END_OF_BUFFER_CHAR;
    yy_current_buffer->yy_ch_buf[yy_n_chars + 1] = YY_END_OF_BUFFER_CHAR;

    yytext_ptr = &yy_current_buffer->yy_ch_buf[0];

    return ret_val;
}


// yy_get_previous_state - get the state just before the EOB char was reached

YY_DECLARE(yy_state_type) yy_get_previous_state (void)
{
    register yy_state_type yy_current_state;
    register char* yy_cp;

%% code to get the start state into yy_current_state goes here

    for (yy_cp = yytext_ptr + YY_MORE_ADJ; yy_cp < yy_c_buf_p; ++yy_cp) {
%% code to find the next state goes here
    }

    return yy_current_state;
}


/* yy_try_NUL_trans - try to make a transition on the NUL character
 *
 * synopsis
 *    next_state = yy_try_NUL_trans(current_state);
 */

YY_DECLARE(yy_state_type) yy_try_NUL_trans(yy_state_type yy_current_state)
{
    register int yy_is_jam;
%% code to find the next state, and perhaps do backing up, goes here

    return yy_is_jam ? 0 : yy_current_state;
}


%-
#ifndef YY_NO_UNPUT
%*
YY_DECLARE(void) yyunput (int c, register char* yy_bp)
{
    register char* yy_cp = yy_c_buf_p;

    // undo effects of setting up yytext
    *yy_cp = yy_hold_char;

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

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

        yy_cp += (int) (dest - source);
        yy_bp += (int) (dest - source);
        yy_n_chars = yy_current_buffer->yy_buf_size;

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

    *--yy_cp = (char) c;

%% update yylineno here

    yytext_ptr = yy_bp;
    yy_hold_char = *yy_cp;
    yy_c_buf_p = yy_cp;
}
%-
#endif    // ifndef YY_NO_UNPUT
%*


YY_DECLARE(int) yyinput (void)
{
    int c;

    *yy_c_buf_p = yy_hold_char;

    if (*yy_c_buf_p == YY_END_OF_BUFFER_CHAR) {
        /* yy_c_buf_p now points to the character we want to return.
         * If this occurs *before* the EOB characters, then it's a
         * valid NUL; if not, then we've hit the end of the buffer.
         */
        if (yy_c_buf_p < &yy_current_buffer->yy_ch_buf[yy_n_chars])
            *yy_c_buf_p = '\0';            // This was really a NUL.
        else { // need more input
            yytext_ptr = yy_c_buf_p;
            ++yy_c_buf_p;

            switch (yy_get_next_buffer()) {
                case EOB_ACT_END_OF_FILE: {
                    if (yywrap()) {
                        yy_c_buf_p =
                        yytext_ptr + YY_MORE_ADJ;
                        return EOF;
                    }

                    if (!yy_did_buffer_switch_on_eof)
                        YY_NEW_FILE;
                    return yyinput();
                }

                case EOB_ACT_CONTINUE_SCAN:
                    yy_c_buf_p = yytext_ptr + YY_MORE_ADJ;
                    break;

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

    c = *(unsigned char*) yy_c_buf_p;    // cast for 8-bit char's
    *yy_c_buf_p = '\0';                    // preserve yytext
    yy_hold_char = *++yy_c_buf_p;

%% update BOL and yylineno

    return c;
}


YY_DECLARE(void) yyrestart (istream* input_file)
{
    if ( ! yy_current_buffer )
        yy_current_buffer = yy_create_buffer( yyin, YY_BUF_SIZE );

    yy_init_buffer( yy_current_buffer, input_file );
    yy_load_buffer_state();
}


YY_DECLARE(void) yy_switch_to_buffer (YY_BUFFER_STATE new_buffer)
{
    if (yy_current_buffer == new_buffer)
        return;

    if (yy_current_buffer) {    // Flush out information for old buffer.
        *yy_c_buf_p = yy_hold_char;
        yy_current_buffer->yy_buf_pos = yy_c_buf_p;
        yy_current_buffer->yy_n_chars = yy_n_chars;
    }

    yy_current_buffer = new_buffer;
    yy_load_buffer_state();

    /* We don't actually know whether we did this switch during
     * EOF (yywrap()) processing, but the only time this flag
     * is looked at is after yywrap() is called, so it's safe
     * to go ahead and always set it.
     */
    yy_did_buffer_switch_on_eof = 1;
}


YY_DECLARE(void) yy_load_buffer_state (void)
{
    yy_n_chars = yy_current_buffer->yy_n_chars;
    yytext_ptr = yy_c_buf_p = yy_current_buffer->yy_buf_pos;
    yyin = yy_current_buffer->yy_input_file;
    yy_hold_char = *yy_c_buf_p;
}


YY_DECLARE(YY_BUFFER_STATE) yy_create_buffer (istream* file, int size)
{
    YY_BUFFER_STATE b;

    b = (YY_BUFFER_STATE) yy_flex_alloc(sizeof(struct yy_buffer_state));
    if (!b)
        YY_FATAL_ERROR("out of dynamic memory in yy_create_buffer()");

    b->yy_buf_size = size;

    /* yy_ch_buf has to be 2 characters longer than the size given because
     * we need to put in 2 end-of-buffer characters.
     */
    b->yy_ch_buf = (char*) yy_flex_alloc(b->yy_buf_size + 2);
    if (!b->yy_ch_buf)
        YY_FATAL_ERROR("out of dynamic memory in yy_create_buffer()");

    b->yy_is_our_buffer = 1;

    yy_init_buffer(b, file);

    return b;
}


YY_DECLARE(void) yy_delete_buffer (YY_BUFFER_STATE b)
{
    if (!b)
        return;

    if (b == yy_current_buffer)
        yy_current_buffer = (YY_BUFFER_STATE) 0;

    if (b->yy_is_our_buffer)
        yy_flex_free((void*) b->yy_ch_buf);

    yy_flex_free((void*) b);
}


#if !defined(YY_ALWAYS_INTERACTIVE) && !defined(YY_NEVER_INTERACTIVE)
extern YY_C int isatty (int);
#endif


YY_DECLARE(void) yy_init_buffer (YY_BUFFER_STATE b, istream* file)
{
    yy_flush_buffer(b);

    b->yy_input_file  = file;
    b->yy_fill_buffer = 1;

%-
#if YY_ALWAYS_INTERACTIVE
    b->yy_is_interactive = 1;
#elif YY_NEVER_INTERACTIVE
    b->yy_is_interactive = 0;
#else
    b->yy_is_interactive = file ? (isatty(fileno(file)) > 0) : 0;
#endif
%+
    b->yy_is_interactive = 0;
%*
}


YY_DECLARE(void) yy_flush_buffer (YY_BUFFER_STATE b)
{
    b->yy_n_chars = 0;

    /* 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.
     */
    b->yy_ch_buf[0] = YY_END_OF_BUFFER_CHAR;
    b->yy_ch_buf[1] = YY_END_OF_BUFFER_CHAR;

    b->yy_buf_pos = &b->yy_ch_buf[0];

    b->yy_at_bol = 1;
    b->yy_buffer_status = YY_BUFFER_NEW;

    if (b == yy_current_buffer)
        yy_load_buffer_state();
}
%* IS THIS NEEDED ???    CEH


#ifndef YY_NO_SCAN_BUFFER
%-
YY_BUFFER_STATE yy_scan_buffer (char* base, yy_size_t size)
{
    YY_BUFFER_STATE b;

    if (size < 2 || base[size-2] != YY_END_OF_BUFFER_CHAR ||
                    base[size-1] != YY_END_OF_BUFFER_CHAR)
        return 0;        // They forgot to leave room for the EOB's.

    b = (YY_BUFFER_STATE) yy_flex_alloc(sizeof(struct yy_buffer_state));
    if (!b)
        YY_FATAL_ERROR("out of dynamic memory in yy_scan_buffer()");

    b->yy_buf_size       = size - 2;    // "- 2" to take care of EOB's
    b->yy_buf_pos        = b->yy_ch_buf = base;
    b->yy_is_our_buffer  = 0;
    b->yy_input_file     = 0;
    b->yy_n_chars        = b->yy_buf_size;
    b->yy_is_interactive = 0;
    b->yy_at_bol         = 1;
    b->yy_fill_buffer    = 0;
    b->yy_buffer_status  = YY_BUFFER_NEW;

    yy_switch_to_buffer(b);

    return b;
}
%*
#endif


#ifndef YY_NO_SCAN_STRING
%-
YY_BUFFER_STATE yy_scan_string (yyconst char* str)
{
    int len;
    for (len = 0; str[len]; ++len)
        ;

    return yy_scan_bytes(str, len);
}
%*
#endif


#ifndef YY_NO_SCAN_BYTES
%-
YY_BUFFER_STATE yy_scan_bytes (yyconst char* bytes, int len)
{
    YY_BUFFER_STATE b;
    char* buf;
    yy_size_t n;
    int i;

    // Get memory for full buffer, including space for trailing EOB's.
    n = len + 2;
    buf = (char*) yy_flex_alloc(n);
    if (!buf)
        YY_FATAL_ERROR("out of dynamic memory in yy_scan_bytes()");

    for (i = 0; i < len; ++i)
        buf[i] = bytes[i];

    buf[len] = buf[len+1] = YY_END_OF_BUFFER_CHAR;

    b = yy_scan_buffer(buf, n);
    if (!b)
        YY_FATAL_ERROR("bad buffer in yy_scan_bytes()");

    /* It's okay to grow etc. this buffer, and we should throw it
     * away when we're done.
     */
    b->yy_is_our_buffer = 1;

    return b;
}
%*
#endif


#ifndef YY_NO_PUSH_STATE
YY_DECLARE(void) yy_push_state (int new_state)
{
    if (yy_start_stack_ptr >= yy_start_stack_depth) {
        yy_size_t new_size;

        yy_start_stack_depth += YY_START_STACK_INCR;
        new_size = yy_start_stack_depth * sizeof(int);

        if (!yy_start_stack)
            yy_start_stack = (int*) yy_flex_alloc(new_size);

        else
            yy_start_stack = (int*) yy_flex_realloc((void*) yy_start_stack, new_size);

        if (!yy_start_stack)
            YY_FATAL_ERROR("out of memory expanding start-condition stack");
    }

    yy_start_stack[yy_start_stack_ptr++] = YY_START;

    BEGIN(new_state);
}
#endif


#ifndef YY_NO_POP_STATE
YY_DECLARE(void) yy_pop_state (void)
{
    if (--yy_start_stack_ptr < 0)
        YY_FATAL_ERROR("start-condition stack underflow");

    BEGIN(yy_start_stack[yy_start_stack_ptr]);
}
#endif


#ifndef YY_NO_TOP_STATE
YY_DECLARE(int) yy_top_state (void)
{
    return yy_start_stack[yy_start_stack_ptr - 1];
}
#endif

#ifndef YY_EXIT_FAILURE
#define YY_EXIT_FAILURE 2
#endif


YY_DECLARE(void) YY_FATAL_ERROR (yyconst char msg[])
{
%-
    (void) fprintf(stderr, "%s\n", msg);
%+
    cerr << msg << '\n';
%*
    exit(YY_EXIT_FAILURE);
}


// Redefine yyless() so it works in section 3 code.

#undef yyless
#define yyless(n)    do { \
        /* Undo effects of setting up yytext. */ \
        yytext[yyleng] = yy_hold_char; \
        yy_c_buf_p = yytext + n - YY_MORE_ADJ; \
        yy_hold_char = *yy_c_buf_p; \
        *yy_c_buf_p = '\0'; \
        yyleng = n; \
    } while (0)


// Internal utility routines.

#ifndef yytext_ptr
static void
yy_flex_strncpy (char* s1, yyconst char* s2, int n)
{
    register int i;
    for (i = 0; i < n; ++i)
        s1[i] = s2[i];
}
#endif


static void*
yy_flex_alloc (yy_size_t size)
{
    return (void*) malloc(size);
}

static void*
yy_flex_realloc (void* ptr, yy_size_t size)
{
    return (void*) realloc(ptr, size);
}

static void
yy_flex_free (void* ptr)
{
    free(ptr);
}

#if YY_MAIN
int
main (void)
{
    yylex();
    return 0;
}
#endif