lex.yy.c

一个编译器修改的例子

/* 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

#include <stdio.h>
#include <errno.h>

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


#ifdef __cplusplus

#include <stdlib.h>
#ifndef _WIN32
#include <unistd.h>
#endif

/* 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;
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_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;


struct yy_buffer_state
	{
	FILE *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
	};

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


/* 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 YY_PROTO(( FILE *input_file ));

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

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

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)

typedef unsigned char YY_CHAR;
FILE *yyin = (FILE *) 0, *yyout = (FILE *) 0;
typedef int yy_state_type;
extern char *yytext;
#define yytext_ptr yytext

static yy_state_type yy_get_previous_state YY_PROTO(( void ));
static yy_state_type yy_try_NUL_trans YY_PROTO(( yy_state_type current_state ));
static int yy_get_next_buffer YY_PROTO(( void ));
static void yy_fatal_error YY_PROTO(( 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; \
	yyleng = (int) (yy_cp - yy_bp); \
	yy_hold_char = *yy_cp; \
	*yy_cp = '\0'; \
	yy_c_buf_p = yy_cp;

#define YY_NUM_RULES 57
#define YY_END_OF_BUFFER 58
static yyconst short int yy_accept[203] =
    {   0,
        0,    0,    0,    0,    0,    0,   58,   56,    1,    2,
       56,   55,   56,   56,   55,   52,   52,   56,   55,   55,
       51,   51,   51,   51,   51,   51,   51,   51,   51,   51,
       51,   51,   51,   51,   51,   51,   51,   51,    7,    6,
        7,    7,   10,    9,   57,    1,    0,   54,    0,    0,
       50,    0,    3,   53,   53,   52,    0,    0,    0,   52,
       11,   14,   13,   12,   51,   51,   51,   51,   51,   19,
       51,   51,   22,   51,   51,   51,   51,   51,   28,   51,
       30,   51,   51,   51,   34,   35,   51,   51,   51,   51,
       51,   43,   51,   51,   51,   51,   51,    4,    5,   10,

        9,    0,    0,    0,   49,    0,    0,    0,    0,    0,
       53,   52,   15,   51,   51,   51,   51,   51,   51,   24,
       51,   26,   51,   29,   31,   32,   51,   51,   51,   51,
       51,   51,   51,   51,   51,   51,   51,   46,   51,   51,
        0,    0,    0,    0,    0,    0,    0,   53,   51,   51,
       18,   20,   51,   23,   51,   51,   33,   51,   37,   51,
       51,   51,   40,   51,   42,   44,   51,   51,   51,    0,
        0,    0,    0,   16,   17,   51,   25,   51,   51,   51,
       51,   51,   51,   45,   47,   51,    0,   21,   51,   51,
       48,   38,   39,   41,   51,   51,   51,    8,   27,   51,

       36,    0
    } ;

static yyconst int yy_ec[256] =
    {   0,
        1,    1,    1,    1,    1,    1,    1,    1,    2,    3,
        1,    1,    4,    1,    1,    1,    1,    1,    1,    1,
        1,    1,    1,    1,    1,    1,    1,    1,    1,    1,
        1,    2,    1,    5,    1,    1,    6,    1,    7,    8,
        9,   10,   11,    1,   11,   12,    6,   13,   14,   14,
       14,   14,   14,   14,   14,   15,   15,   16,    1,   17,
       18,   19,   20,    1,   21,   21,   21,   21,   22,   21,
       23,   23,   23,   23,   23,   23,   23,   23,   23,   23,
       23,   23,   23,   23,   23,   23,   23,   24,   23,   23,
        6,   25,    1,    1,   23,    1,   26,   27,   28,   29,

       30,   31,   32,   33,   34,   23,   23,   35,   23,   36,
       37,   38,   23,   39,   40,   41,   42,   43,   44,   45,
       46,   47,    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[48] =
    {   0,
        1,    2,    3,    2,    4,    1,    4,    1,    1,    1,
        1,    1,    5,    5,    6,    1,    1,    1,    1,    4,
        6,    6,    7,    7,    4,    5,    5,    6,    6,    6,
        5,    7,    7,    7,    7,    8,    7,    7,    8,    7,
        8,    7,    8,    7,    8,    7,    7
    } ;

static yyconst short int yy_base[217] =
    {   0,
        0,  359,   45,   46,   48,   55,  392,  394,   58,  394,
       56,  394,   57,  381,   52,   71,   57,  372,   55,  371,
        0,   39,   59,  355,   60,   41,   62,   67,   72,   61,
      348,  356,   72,   78,  349,  358,  350,   87,  394,  394,
      372,  372,    0,  378,  394,  106,  107,  394,  106,  114,
      394,  111,  394,  115,  120,  128,  140,  133,    0,  151,
      394,  394,  394,  394,    0,  350,  339,  345,  339,    0,
      349,  339,    0,  333,  343,  336,  326,  328,    0,  315,
        0,  311,  306,  308,    0,    0,  305,  131,  287,  294,
      292,    0,  272,  248,  249,  253,  108,  394,  394,    0,

      282,  162,    0,  153,  394,  166,  170,    0,  175,  178,
      183,    0,    0,  257,  248,  246,  241,  246,  245,    0,
      234,    0,  245,    0,    0,    0,  237,  241,  233,  230,
      225,  212,  223,  217,  211,  216,  211,    0,  209,  208,
      189,  210,  192,    0,  194,  235,  207,  213,  188,  197,
        0,    0,  189,    0,  199,  177,    0,  186,    0,  174,
      186,  171,    0,  173,    0,    0,  169,  170,  143,    0,
      245,  264,    0,    0,    0,  152,    0,  140,  142,  139,
      120,  102,   99,    0,    0,   97,    0,    0,   85,   52,
        0,    0,    0,    0,   61,   44,   29,    0,    0,   33,

        0,  394,  295,  303,  311,  319,  323,  331,  336,  344,
      349,  353,  355,  358,  362,  364
    } ;

static yyconst short int yy_def[217] =
    {   0,
      202,    1,  203,  203,  204,  204,  202,  202,  202,  202,
      205,  202,  206,  202,  202,  202,  202,  202,  202,  202,
      207,  207,  207,  207,  207,  207,  207,  207,  207,  207,
      207,  207,  207,  207,  207,  207,  207,  207,  202,  202,
      202,  202,  208,  202,  202,  202,  205,  202,  209,  210,
      202,  211,  202,  202,  202,  202,  202,  202,  212,  202,
      202,  202,  202,  202,  207,  207,  207,  207,  207,  207,
      207,  207,  207,  207,  207,  207,  207,  207,  207,  207,
      207,  207,  207,  207,  207,  207,  207,  207,  207,  207,
      207,  207,  207,  207,  207,  207,  207,  202,  202,  208,

      202,  205,  213,  210,  202,  214,  210,  215,  202,  202,
      202,  212,  207,  207,  207,  207,  207,  207,  207,  207,
      207,  207,  207,  207,  207,  207,  207,  207,  207,  207,
      207,  207,  207,  207,  207,  207,  207,  207,  207,  207,
      205,  205,  210,  216,  210,  210,  202,  202,  207,  207,
      207,  207,  207,  207,  207,  207,  207,  207,  207,  207,
      207,  207,  207,  207,  207,  207,  207,  207,  207,  142,
      210,  146,  146,  207,  207,  207,  207,  207,  207,  207,
      207,  207,  207,  207,  207,  207,  172,  207,  207,  207,
      207,  207,  207,  207,  207,  207,  207,  207,  207,  207,

      207,    0,  202,  202,  202,  202,  202,  202,  202,  202,
      202,  202,  202,  202,  202,  202
    } ;

static yyconst short int yy_nxt[442] =
    {   0,
        8,    9,   10,    9,   11,   12,   13,   14,    8,   12,
       12,   15,   16,   17,   17,   18,   19,   12,   20,    8,
       21,   21,   21,   21,    8,   22,   23,   24,   25,   26,
       27,   21,   21,   28,   21,   29,   30,   31,   32,   33,
       34,   35,   36,   37,   21,   21,   21,   40,   40,   44,
       45,   45,   41,   41,   42,   42,   44,   45,   45,   46,
       48,   46,  201,   51,   54,   54,   54,  200,   55,   60,
       60,   60,   62,   63,   66,   74,   75,   67,   58,  199,
       49,   52,   55,   56,   56,   57,   58,   76,   68,   72,
      198,   85,   58,  197,   59,   69,   73,   79,   77,   86,

       58,   82,   80,   78,   70,   89,   81,   46,   83,   46,
       91,   48,   90,   84,   92,   59,   93,   79,  102,  102,
      105,  196,   97,  107,  107,  195,   81,   54,   54,   54,
      194,   49,   54,   54,   54,  140,  109,  193,  106,   55,
       56,   56,   57,  110,  109,  111,  111,  111,  124,   58,
      103,   55,   57,   57,   57,  108,  129,   58,  130,   51,
      192,   58,   55,   60,   60,   60,   48,  191,  131,   58,
      190,  132,   58,  189,  141,  141,  105,  106,  143,  143,
       58,  188,  145,  145,  186,  147,   49,  148,  148,  148,
      111,  111,  111,   48,  106,  111,  111,  111,   51,  185,

      105,  141,  141,  184,  171,  171,  145,  145,  183,  182,
      144,  181,  180,   49,   48,  179,  106,  178,  106,  148,
      148,  148,  170,  170,  170,  148,  148,  148,  177,  176,
      170,  170,  175,  174,   49,  170,  170,  170,  170,  170,
      170,  105,  169,  168,  167,  166,  165,  173,  173,  173,
      164,   51,  163,  162,  161,  173,  173,  171,  171,  106,
      173,  173,  173,  173,  173,  173,  160,  159,  158,  106,
       51,  157,  156,  155,  154,  153,  187,  187,  187,  152,
      151,  150,  149,  101,  187,  187,  139,  138,  137,  187,
      187,  187,  187,  187,  187,   39,   39,   39,   39,   39,

       39,   39,   39,   43,   43,   43,   43,   43,   43,   43,
       43,   47,   47,  136,   47,   47,   47,   47,   47,   50,
       50,  135,   50,   50,   50,   50,   50,   65,   65,   65,
       65,  100,  134,  133,  100,  100,  100,  100,  100,   47,
       47,  128,  127,   47,  104,  104,  126,  104,  104,  104,
      104,  104,   50,   50,  125,  124,   50,  112,  112,  142,
      142,  104,  104,  123,  122,  104,  146,  146,  172,  172,
      121,  120,  119,  118,  117,  116,  115,  114,  113,  101,
       99,   98,   96,   95,   94,   88,   87,   71,   64,   61,
       53,  202,   38,    7,  202,  202,  202,  202,  202,  202,

      202,  202,  202,  202,  202,  202,  202,  202,  202,  202,
      202,  202,  202,  202,  202,  202,  202,  202,  202,  202,
      202,  202,  202,  202,  202,  202,  202,  202,  202,  202,
      202,  202,  202,  202,  202,  202,  202,  202,  202,  202,
      202
    } ;

static yyconst short int yy_chk[442] =
    {   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,    1,    1,    1,    1,
        1,    1,    1,    1,    1,    1,    1,    1,    1,    1,
        1,    1,    1,    1,    1,    1,    1,    3,    4,    5,
        5,    5,    3,    4,    3,    4,    6,    6,    6,    9,
       11,    9,  200,   13,   15,   15,   15,  197,   17,   17,
       17,   17,   19,   19,   22,   26,   26,   22,   17,  196,
       11,   13,   16,   16,   16,   16,   17,   27,   23,   25,
      195,   30,   16,  190,   16,   23,   25,   28,   27,   30,

       16,   29,   28,   27,   23,   33,   28,   46,   29,   46,
       34,   47,   33,   29,   34,   16,   34,   38,   49,   49,
       50,  189,   38,   52,   52,  186,   38,   54,   54,   54,
      183,   47,   55,   55,   55,   97,   54,  182,   50,   56,
       56,   56,   56,   58,   54,   58,   58,   58,   97,   56,
       49,   57,   57,   57,   57,   52,   88,   56,   88,  104,
      181,   57,   60,   60,   60,   60,  102,  180,   88,   57,
      179,   88,   60,  178,  102,  102,  107,  104,  106,  106,
       60,  176,  107,  107,  169,  109,  102,  109,  109,  109,
      110,  110,  110,  141,  107,  111,  111,  111,  143,  168,

      145,  141,  141,  167,  143,  143,  145,  145,  164,  162,
      106,  161,  160,  141,  142,  158,  143,  156,  145,  147,
      147,  147,  142,  142,  142,  148,  148,  148,  155,  153,
      142,  142,  150,  149,  142,  142,  142,  142,  142,  142,
      142,  146,  140,  139,  137,  136,  135,  146,  146,  146,
      134,  171,  133,  132,  131,  146,  146,  171,  171,  146,
      146,  146,  146,  146,  146,  146,  130,  129,  128,  171,
      172,  127,  123,  121,  119,  118,  172,  172,  172,  117,
      116,  115,  114,  101,  172,  172,   96,   95,   94,  172,
      172,  172,  172,  172,  172,  203,  203,  203,  203,  203,

      203,  203,  203,  204,  204,  204,  204,  204,  204,  204,
      204,  205,  205,   93,  205,  205,  205,  205,  205,  206,
      206,   91,  206,  206,  206,  206,  206,  207,  207,  207,
      207,  208,   90,   89,  208,  208,  208,  208,  208,  209,
      209,   87,   84,  209,  210,  210,   83,  210,  210,  210,
      210,  210,  211,  211,   82,   80,  211,  212,  212,  213,
      213,  214,  214,   78,   77,  214,  215,  215,  216,  216,
       76,   75,   74,   72,   71,   69,   68,   67,   66,   44,
       42,   41,   37,   36,   35,   32,   31,   24,   20,   18,
       14,    7,    2,  202,  202,  202,  202,  202,  202,  202,

      202,  202,  202,  202,  202,  202,  202,  202,  202,  202,
      202,  202,  202,  202,  202,  202,  202,  202,  202,  202,
      202,  202,  202,  202,  202,  202,  202,  202,  202,  202,
      202,  202,  202,  202,  202,  202,  202,  202,  202,  202,