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chemlex.cc

#line 2 "chemlex.cc"
/* A lexical scanner generated by flex */

/* Scanner skeleton version:
 * $Header: /home/daffy/u0/vern/flex/RCS/flex.skl,v 2.91 96/09/10 16:58:48 vern Exp $
 */

#define FLEX_SCANNER
#define YY_FLEX_MAJOR_VERSION 2
#define YY_FLEX_MINOR_VERSION 5



/* cfront 1.2 defines "c_plusplus" instead of "__cplusplus" */
#ifdef c_plusplus
#ifndef __cplusplus
#define __cplusplus
#endif
#endif


#ifdef __cplusplus

#include <stdlib.h>
class istream;

/* Use prototypes in function declarations. */
#define YY_USE_PROTOS

/* The "const" storage-class-modifier is valid. */
#define YY_USE_CONST

#else /* ! __cplusplus */

#if __STDC__

#define YY_USE_PROTOS
#define YY_USE_CONST

#endif      /* __STDC__ */
#endif      /* ! __cplusplus */

#ifdef __TURBOC__
 #pragma warn -rch
 #pragma warn -use
#include <io.h>
#include <stdlib.h>
#define YY_USE_CONST
#define YY_USE_PROTOS
#endif

#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;

#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_RESTORE_YY_MORE_OFFSET \
            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;


00143 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
      };


/* 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



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


#define yywrap() 1
#define YY_SKIP_YYWRAP
typedef unsigned char YY_CHAR;
#define yytext_ptr yytext
#define YY_INTERACTIVE

#include <FlexLexer.h>


/* 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; \
      yyleng = (int) (yy_cp - yy_bp); \
      yy_hold_char = *yy_cp; \
      *yy_cp = '\0'; \
      yy_c_buf_p = yy_cp;

#define YY_NUM_RULES 29
#define YY_END_OF_BUFFER 30
static yyconst short int yy_accept[51] =
    {   0,
        0,    0,   30,   28,   21,   27,    3,    4,   19,   18,
        8,   26,    1,    1,    6,    7,   22,   28,   28,    2,
       24,   23,   21,    5,   17,   27,   12,   11,   13,   15,
       20,    0,   14,   16,    0,    0,    8,    0,    1,    1,
        0,   24,   23,   25,    9,    0,   10,    0,    9,    0
    } ;

static yyconst int yy_ec[256] =
    {   0,
        1,    1,    1,    1,    1,    1,    1,    1,    2,    3,
        1,    1,    1,    1,    1,    1,    1,    1,    1,    1,
        1,    1,    1,    1,    1,    1,    1,    1,    1,    1,
        1,    2,    1,    1,    1,    1,    1,    1,    1,    4,
        5,    1,    6,    1,    7,    8,    9,   10,   10,   10,
       10,   10,   10,   10,   10,   10,   10,    1,    1,    1,
       11,   12,    1,    1,   13,   13,   13,   13,   14,   13,
       13,   13,   13,   13,   13,   13,   13,   13,   13,   13,
       13,   13,   13,   13,   15,   13,   13,   13,   13,   13,
       16,    1,   17,   18,   19,    1,   20,   21,   21,   21,

       22,   21,   23,   21,   21,   21,   21,   21,   21,   21,
       21,   21,   24,   21,   25,   21,   26,   21,   21,   21,
       21,   21,    1,    1,    1,    1,    1,    1,    1,    1,
        1,    1,    1,    1,    1,    1,    1,    1,    1,    1,
        1,    1,    1,    1,    1,    1,    1,    1,    1,    1,
        1,    1,    1,    1,    1,    1,    1,    1,    1,    1,
        1,    1,    1,    1,    1,    1,    1,    1,    1,    1,
        1,    1,    1,    1,    1,    1,    1,    1,    1,    1,
        1,    1,    1,    1,    1,    1,    1,    1,    1,    1,
        1,    1,    1,    1,    1,    1,    1,    1,    1,    1,

        1,    1,    1,    1,    1,    1,    1,    1,    1,    1,
        1,    1,    1,    1,    1,    1,    1,    1,    1,    1,
        1,    1,    1,    1,    1,    1,    1,    1,    1,    1,
        1,    1,    1,    1,    1,    1,    1,    1,    1,    1,
        1,    1,    1,    1,    1,    1,    1,    1,    1,    1,
        1,    1,    1,    1,    1
    } ;

static yyconst int yy_meta[27] =
    {   0,
        1,    1,    2,    1,    1,    1,    1,    1,    1,    1,
        1,    1,    1,    1,    1,    1,    1,    1,    1,    3,
        3,    3,    3,    3,    3,    3
    } ;

static yyconst short int yy_base[53] =
    {   0,
        0,    0,   76,   77,   25,    0,   77,   77,   22,   23,
       34,   77,    0,   49,   77,   77,   77,   14,   49,   77,
       77,   77,   43,   77,   77,    0,   64,   59,   39,   58,
       77,   48,   77,   77,   57,   50,    0,   48,   77,    0,
       43,   77,   77,   77,   49,   51,   55,   54,   52,   77,
       71,   35
    } ;

static yyconst short int yy_def[53] =
    {   0,
       50,    1,   50,   50,   50,   51,   50,   50,   50,   50,
       50,   50,   52,   52,   50,   50,   50,   50,   50,   50,
       50,   50,   50,   50,   50,   51,   50,   50,   50,   50,
       50,   50,   50,   50,   50,   50,   11,   50,   50,   52,
       50,   50,   50,   50,   50,   50,   50,   50,   50,    0,
       50,   50
    } ;

static yyconst short int yy_nxt[104] =
    {   0,
        4,    5,    6,    7,    8,    9,   10,    4,    4,   11,
       12,    4,   13,   13,   14,   15,   16,   17,   18,   19,
        4,   20,   21,    4,   22,    4,   23,   27,   24,   29,
       25,   28,   30,   41,   31,   32,   42,   39,   43,   33,
       34,   35,   36,   37,   23,   29,   24,   38,   25,   32,
       31,   46,   46,   48,   48,   38,   36,   49,   45,   47,
       47,   49,   38,   49,   47,   44,   45,   30,   28,   27,
       38,   26,   44,   26,   40,   50,    3,   50,   50,   50,
       50,   50,   50,   50,   50,   50,   50,   50,   50,   50,
       50,   50,   50,   50,   50,   50,   50,   50,   50,   50,

       50,   50,   50
    } ;

static yyconst short int yy_chk[104] =
    {   0,
        1,    1,    1,    1,    1,    1,    1,    1,    1,    1,
        1,    1,    1,    1,    1,    1,    1,    1,    1,    1,
        1,    1,    1,    1,    1,    1,    5,    9,    5,   10,
        5,    9,   10,   18,   10,   11,   18,   52,   18,   11,
       11,   11,   11,   11,   23,   29,   23,   11,   23,   32,
       29,   36,   46,   38,   38,   11,   32,   38,   45,   36,
       46,   49,   45,   48,   47,   41,   35,   30,   28,   27,
       45,   51,   19,   51,   14,    3,   50,   50,   50,   50,
       50,   50,   50,   50,   50,   50,   50,   50,   50,   50,
       50,   50,   50,   50,   50,   50,   50,   50,   50,   50,

       50,   50,   50
    } ;

/* The intent behind this definition is that it'll catch
 * any uses of REJECT which flex missed.
 */
#define REJECT reject_used_but_not_detected
#define yymore() yymore_used_but_not_detected
#define YY_MORE_ADJ 0
#define YY_RESTORE_YY_MORE_OFFSET
#line 1 "chemeq.l"
#define INITIAL 0
#include <stdlib.h>
#include "chemeq.h"
char * ind;
int position = 0;
/* les nombres */
/* la flèche */
#line 369 "chemlex.cc"

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

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


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

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

#ifndef YY_NO_INPUT
#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 YY_PROTO(( int new_state ));
#endif
#ifndef YY_NO_POP_STATE
static void yy_pop_state YY_PROTO(( void ));
#endif
#ifndef YY_NO_TOP_STATE
static int yy_top_state YY_PROTO(( 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
#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) \
      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) LexerError( msg )
#endif

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

#define YY_RULE_SETUP \
      YY_USER_ACTION

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

#line 23 "chemeq.l"

 /* les règles */

 /* pour les atomes */
#line 501 "chemlex.cc"

      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 = &cin;

            if ( ! yyout )
                  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 */
            {
            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 >= 51 )
                              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] != 77 );

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:
YY_RULE_SETUP
#line 27 "chemeq.l"
{ /* éléments Uux : transuraniens après le N° 109
                           les autres sont les éléments ordinaires */
    int i = 0;
    position += strlen(yytext);
    while (lesatomes[i].Zed != 0 && strcmp(yytext, lesatomes[i].symb)) i++;
    if (lesatomes[i].Zed == 0){
      yylval.i=-2;      /* -2 est le n° pour les éléments non définis */
      strncpy(yylval.symb, yytext,3);
    }
    else {
      yylval.i=i;
      strcpy(yylval.symb, lesatomes[i].symb);
    }
    yylval.s = yytext;
    return Atome;
  }
      YY_BREAK
case 2:
YY_RULE_SETUP
#line 44 "chemeq.l"
{position++; yylval.i=-1; strcpy(yylval.symb, "e");return Atome;}
      YY_BREAK
case 3:
YY_RULE_SETUP
#line 47 "chemeq.l"
{ position++; return Lpar;}
      YY_BREAK
case 4:
YY_RULE_SETUP
#line 48 "chemeq.l"
{ position++; return Rpar;}
      YY_BREAK
case 5:
YY_RULE_SETUP
#line 50 "chemeq.l"
{ position += strlen(yytext); return SpcLpar;}
      YY_BREAK
case 6:
YY_RULE_SETUP
#line 51 "chemeq.l"
{ position ++; return Lsq;}
      YY_BREAK
case 7:
YY_RULE_SETUP
#line 52 "chemeq.l"
{ position ++; return Rsq;}
      YY_BREAK
case 8:
YY_RULE_SETUP
#line 53 "chemeq.l"
{ position += strlen(yytext); yylval.i = atoi(yytext); return Int; }
      YY_BREAK
case 9:
YY_RULE_SETUP
#line 54 "chemeq.l"
{ position += strlen(yytext); yylval.r = atof(yytext); return Real;}
      YY_BREAK
case 10:
YY_RULE_SETUP
#line 55 "chemeq.l"
{ position += strlen(yytext); ind = index(yytext,'/'); *ind=0; 
         yylval.i = atoi(yytext); yylval.d = atoi(ind+1); 
         return Frac;
       }
      YY_BREAK
case 11:
YY_RULE_SETUP
#line 59 "chemeq.l"
{ position += strlen(yytext); yylval.i = atoi(yytext+1); 
           return Charge;
         }
      YY_BREAK
case 12:
YY_RULE_SETUP
#line 62 "chemeq.l"
{ position += strlen(yytext); 
           yylval.i = strlen(yytext); return Charge;
         }
      YY_BREAK
case 13:
YY_RULE_SETUP
#line 65 "chemeq.l"
{ position += strlen(yytext); yylval.i = -strlen(yytext); 
           return Charge;
         }
      YY_BREAK
case 14:
YY_RULE_SETUP
#line 68 "chemeq.l"
{ position += strlen(yytext); yytext[strlen(yytext)]=0; 
           yylval.i = atoi(yytext); return Charge;
         }
      YY_BREAK
case 15:
YY_RULE_SETUP
#line 71 "chemeq.l"
{ position += strlen(yytext); yylval.i = -atoi(yytext+1); 
           return Charge;
         }
      YY_BREAK
case 16:
YY_RULE_SETUP
#line 74 "chemeq.l"
{ position += strlen(yytext); yytext[strlen(yytext)]=0; 
           yylval.i = -atoi(yytext); return Charge;
         }
      YY_BREAK
case 17:
YY_RULE_SETUP
#line 77 "chemeq.l"
{position += strlen(yytext); return SpcPlus;}
      YY_BREAK
case 18:
YY_RULE_SETUP
#line 78 "chemeq.l"
{position += strlen(yytext); return Moins;}
      YY_BREAK
case 19:
YY_RULE_SETUP
#line 79 "chemeq.l"
{ position ++; return Plus;} 
      YY_BREAK
case 20:
YY_RULE_SETUP
#line 80 "chemeq.l"
{position += strlen(yytext); return Fleche;}
      YY_BREAK
case 21:
YY_RULE_SETUP
#line 81 "chemeq.l"
{position += strlen(yytext); return Spc;}
      YY_BREAK
case 22:
YY_RULE_SETUP
#line 82 "chemeq.l"
{position ++; return Haut;}
      YY_BREAK
case 23:
YY_RULE_SETUP
#line 83 "chemeq.l"
{position += strlen(yytext); return Sol;}
      YY_BREAK
case 24:
YY_RULE_SETUP
#line 84 "chemeq.l"
{position += strlen(yytext); return Gas;}
      YY_BREAK
case 25:
YY_RULE_SETUP
#line 85 "chemeq.l"
{position += strlen(yytext); return Aqueous;}
      YY_BREAK
case 26:
YY_RULE_SETUP
#line 86 "chemeq.l"
{position ++; return Egal;}
      YY_BREAK
case 27:
YY_RULE_SETUP
#line 87 "chemeq.l"
{/* rien c'est la fin des entrées */}
      YY_BREAK
case 28:
YY_RULE_SETUP
#line 88 "chemeq.l"
{position += strlen(yytext); /* rien */}
      YY_BREAK
case 29:
YY_RULE_SETUP
#line 89 "chemeq.l"
ECHO;
      YY_BREAK
#line 759 "chemlex.cc"
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->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 input().
             */
            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
                        {
                        yy_cp = yy_c_buf_p;
                        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 */

yyFlexLexer::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_more_offset = yy_prev_more_offset = 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
      }

yyFlexLexer::~yyFlexLexer()
      {
      delete yy_state_buf;
      yy_delete_buffer( yy_current_buffer );
      }

void yyFlexLexer::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;
      }

#ifdef YY_INTERACTIVE
int yyFlexLexer::LexerInput( char* buf, int /* max_size */ )
#else
int yyFlexLexer::LexerInput( char* buf, int 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 );

      if ( yyin->bad() )
            return -1;
      else
            return yyin->gcount();
#endif
      }

void yyFlexLexer::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
 */

int yyFlexLexer::yy_get_next_buffer()
      {
      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 single character, 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_current_buffer->yy_n_chars = 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 );

            yy_current_buffer->yy_n_chars = yy_n_chars;
            }

      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_state_type yyFlexLexer::yy_get_previous_state()
      {
      register yy_state_type yy_current_state;
      register char *yy_cp;

      yy_current_state = yy_start;

      for ( yy_cp = yytext_ptr + YY_MORE_ADJ; yy_cp < yy_c_buf_p; ++yy_cp )
            {
            register YY_CHAR yy_c = (*yy_cp ? yy_ec[YY_SC_TO_UI(*yy_cp)] : 1);
            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 >= 51 )
                        yy_c = yy_meta[(unsigned int) yy_c];
                  }
            yy_current_state = yy_nxt[yy_base[yy_current_state] + (unsigned int) yy_c];
            }

      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_state_type yyFlexLexer::yy_try_NUL_trans( yy_state_type yy_current_state )
      {
      register int yy_is_jam;
      register char *yy_cp = yy_c_buf_p;

      register YY_CHAR yy_c = 1;
      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 >= 51 )
                  yy_c = yy_meta[(unsigned int) yy_c];
            }
      yy_current_state = yy_nxt[yy_base[yy_current_state] + (unsigned int) yy_c];
      yy_is_jam = (yy_current_state == 50);

      return yy_is_jam ? 0 : yy_current_state;
      }


void yyFlexLexer::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_current_buffer->yy_n_chars =
                  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;


      yytext_ptr = yy_bp;
      yy_hold_char = *yy_cp;
      yy_c_buf_p = yy_cp;
      }


int yyFlexLexer::yyinput()
      {
      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] )
                  /* This was really a NUL. */
                  *yy_c_buf_p = '\0';

            else
                  { /* need more input */
                  int offset = yy_c_buf_p - yytext_ptr;
                  ++yy_c_buf_p;

                  switch ( yy_get_next_buffer() )
                        {
                        case EOB_ACT_LAST_MATCH:
                              /* This happens because yy_g_n_b()
                               * sees that we've accumulated a
                               * token and flags that we need to
                               * try matching the token before
                               * proceeding.  But for input(),
                               * there's no matching to consider.
                               * So convert the EOB_ACT_LAST_MATCH
                               * to EOB_ACT_END_OF_FILE.
                               */

                              /* Reset buffer status. */
                              yyrestart( yyin );

                              /* fall through */

                        case EOB_ACT_END_OF_FILE:
                              {
                              if ( yywrap() )
                                    return EOF;

                              if ( ! yy_did_buffer_switch_on_eof )
                                    YY_NEW_FILE;
#ifdef __cplusplus
                              return yyinput();
#else
                              return input();
#endif
                              }

                        case EOB_ACT_CONTINUE_SCAN:
                              yy_c_buf_p = yytext_ptr + offset;
                              break;
                        }
                  }
            }

      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;


      return c;
      }


void yyFlexLexer::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();
      }


void yyFlexLexer::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;
      }


void yyFlexLexer::yy_load_buffer_state()
      {
      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_BUFFER_STATE yyFlexLexer::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;
      }


void yyFlexLexer::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 );
      }


void yyFlexLexer::yy_init_buffer( YY_BUFFER_STATE b, istream* file )

      {
      yy_flush_buffer( b );

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

      b->yy_is_interactive = 0;
      }


void yyFlexLexer::yy_flush_buffer( YY_BUFFER_STATE b )
      {
      if ( ! b )
            return;

      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();
      }


#ifndef YY_NO_SCAN_BUFFER
#endif


#ifndef YY_NO_SCAN_STRING
#endif


#ifndef YY_NO_SCAN_BYTES
#endif


#ifndef YY_NO_PUSH_STATE
void yyFlexLexer::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
void yyFlexLexer::yy_pop_state()
      {
      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
int yyFlexLexer::yy_top_state()
      {
      return yy_start_stack[yy_start_stack_ptr - 1];
      }
#endif

#ifndef YY_EXIT_FAILURE
#define YY_EXIT_FAILURE 2
#endif


void yyFlexLexer::LexerError( yyconst char 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_hold_char = *yy_c_buf_p; \
            *yy_c_buf_p = '\0'; \
            yyleng = n; \
            } \
      while ( 0 )


/* Internal utility routines. */

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

#ifdef YY_NEED_STRLEN
#ifdef YY_USE_PROTOS
static int yy_flex_strlen( yyconst char *s )
#else
static int yy_flex_strlen( s )
yyconst char *s;
#endif
      {
      register int n;
      for ( n = 0; s[n]; ++n )
            ;

      return n;
      }
#endif


#ifdef YY_USE_PROTOS
static void *yy_flex_alloc( yy_size_t size )
#else
static void *yy_flex_alloc( size )
yy_size_t size;
#endif
      {
      return (void *) malloc( size );
      }

#ifdef YY_USE_PROTOS
static void *yy_flex_realloc( void *ptr, yy_size_t size )
#else
static void *yy_flex_realloc( ptr, size )
void *ptr;
yy_size_t size;
#endif
      {
      /* The cast to (char *) in the following accommodates both
       * implementations that use char* generic pointers, and those
       * that use void* generic pointers.  It works with the latter
       * because both ANSI C and C++ allow castless assignment from
       * any pointer type to void*, and deal with argument conversions
       * as though doing an assignment.
       */
      return (void *) realloc( (char *) ptr, size );
      }

#ifdef YY_USE_PROTOS
static void yy_flex_free( void *ptr )
#else
static void yy_flex_free( ptr )
void *ptr;
#endif
      {
      free( ptr );
      }

#if YY_MAIN
int main()
      {
      yylex();
      return 0;
      }
#endif
#line 89 "chemeq.l"

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