calc_flex.c

来自「利用flex和bison做的简易C语言编译器核心 支持C语言的大部分运算操作」· C语言 代码 · 共 2,297 行 · 第 1/4 页

#line 2 "calc_flex.c"

#line 4 "calc_flex.c"

#define  YY_INT_ALIGNED short int

/* A lexical scanner generated by flex */

#define FLEX_SCANNER
#define YY_FLEX_MAJOR_VERSION 2
#define YY_FLEX_MINOR_VERSION 5
#define YY_FLEX_SUBMINOR_VERSION 33
#if YY_FLEX_SUBMINOR_VERSION > 0
#define FLEX_BETA
#endif

/* First, we deal with  platform-specific or compiler-specific issues. */

/* begin standard C headers. */
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <stdlib.h>

/* end standard C headers. */

/* flex integer type definitions */

#ifndef FLEXINT_H
#define FLEXINT_H

/* C99 systems have <inttypes.h>. Non-C99 systems may or may not. */

#if __STDC_VERSION__ >= 199901L

/* C99 says to define __STDC_LIMIT_MACROS before including stdint.h,
 * if you want the limit (max/min) macros for int types. 
 */
#ifndef __STDC_LIMIT_MACROS
#define __STDC_LIMIT_MACROS 1
#endif

#include <inttypes.h>
typedef int8_t flex_int8_t;
typedef uint8_t flex_uint8_t;
typedef int16_t flex_int16_t;
typedef uint16_t flex_uint16_t;
typedef int32_t flex_int32_t;
typedef uint32_t flex_uint32_t;
#else
typedef signed char flex_int8_t;
typedef short int flex_int16_t;
typedef int flex_int32_t;
typedef unsigned char flex_uint8_t; 
typedef unsigned short int flex_uint16_t;
typedef unsigned int flex_uint32_t;
#endif /* ! C99 */

/* Limits of integral types. */
#ifndef INT8_MIN
#define INT8_MIN               (-128)
#endif
#ifndef INT16_MIN
#define INT16_MIN              (-32767-1)
#endif
#ifndef INT32_MIN
#define INT32_MIN              (-2147483647-1)
#endif
#ifndef INT8_MAX
#define INT8_MAX               (127)
#endif
#ifndef INT16_MAX
#define INT16_MAX              (32767)
#endif
#ifndef INT32_MAX
#define INT32_MAX              (2147483647)
#endif
#ifndef UINT8_MAX
#define UINT8_MAX              (255U)
#endif
#ifndef UINT16_MAX
#define UINT16_MAX             (65535U)
#endif
#ifndef UINT32_MAX
#define UINT32_MAX             (4294967295U)
#endif

#endif /* ! FLEXINT_H */

#ifdef __cplusplus

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

#else	/* ! __cplusplus */

#if __STDC__

#define YY_USE_CONST

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

#ifdef YY_USE_CONST
#define yyconst const
#else
#define yyconst
#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. */
#ifndef YY_BUF_SIZE
#define YY_BUF_SIZE 16384
#endif

/* The state buf must be large enough to hold one state per character in the main buffer.
 */
#define YY_STATE_BUF_SIZE   ((YY_BUF_SIZE + 2) * sizeof(yy_state_type))

#ifndef YY_TYPEDEF_YY_BUFFER_STATE
#define YY_TYPEDEF_YY_BUFFER_STATE
typedef struct yy_buffer_state *YY_BUFFER_STATE;
#endif

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

    #define YY_LESS_LINENO(n)
    
/* Return all but the first "n" matched characters back to the input stream. */
#define yyless(n) \
	do \
		{ \
		/* Undo effects of setting up yytext. */ \
        int yyless_macro_arg = (n); \
        YY_LESS_LINENO(yyless_macro_arg);\
		*yy_cp = (yy_hold_char); \
		YY_RESTORE_YY_MORE_OFFSET \
		(yy_c_buf_p) = yy_cp = yy_bp + yyless_macro_arg - 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).
 */

#ifndef YY_TYPEDEF_YY_SIZE_T
#define YY_TYPEDEF_YY_SIZE_T
typedef unsigned int yy_size_t;
#endif

#ifndef YY_STRUCT_YY_BUFFER_STATE
#define YY_STRUCT_YY_BUFFER_STATE
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;

    int yy_bs_lineno; /**< The line count. */
    int yy_bs_column; /**< The column count. */
    
	/* 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

	};
#endif /* !YY_STRUCT_YY_BUFFER_STATE */

/* Stack of input buffers. */
static size_t yy_buffer_stack_top = 0; /**< index of top of stack. */
static size_t yy_buffer_stack_max = 0; /**< capacity of stack. */
static YY_BUFFER_STATE * yy_buffer_stack = 0; /**< Stack as an array. */

/* 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".
 *
 * Returns the top of the stack, or NULL.
 */
#define YY_CURRENT_BUFFER ( (yy_buffer_stack) \
                          ? (yy_buffer_stack)[(yy_buffer_stack_top)] \
                          : NULL)

/* Same as previous macro, but useful when we know that the buffer stack is not
 * NULL or when we need an lvalue. For internal use only.
 */
#define YY_CURRENT_BUFFER_LVALUE (yy_buffer_stack)[(yy_buffer_stack_top)]

/* 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 = 0;		/* 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 (FILE *input_file  );
void yy_switch_to_buffer (YY_BUFFER_STATE new_buffer  );
YY_BUFFER_STATE yy_create_buffer (FILE *file,int size  );
void yy_delete_buffer (YY_BUFFER_STATE b  );
void yy_flush_buffer (YY_BUFFER_STATE b  );
void yypush_buffer_state (YY_BUFFER_STATE new_buffer  );
void yypop_buffer_state (void );

static void yyensure_buffer_stack (void );
static void yy_load_buffer_state (void );
static void yy_init_buffer (YY_BUFFER_STATE b,FILE *file  );

#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 *yy_str  );
YY_BUFFER_STATE yy_scan_bytes (yyconst char *bytes,int len  );

void *yyalloc (yy_size_t  );
void *yyrealloc (void *,yy_size_t  );
void yyfree (void *  );

#define yy_new_buffer yy_create_buffer

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

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

#define YY_AT_BOL() (YY_CURRENT_BUFFER_LVALUE->yy_at_bol)

/* Begin user sect3 */

typedef unsigned char YY_CHAR;

FILE *yyin = (FILE *) 0, *yyout = (FILE *) 0;

typedef int yy_state_type;

extern int yylineno;

int yylineno = 1;

extern char *yytext;
#define yytext_ptr yytext

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; \
	yyleng = (size_t) (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
/* This struct is not used in this scanner,
   but its presence is necessary. */
struct yy_trans_info
	{
	flex_int32_t yy_verify;
	flex_int32_t yy_nxt;
	};
static yyconst flex_int16_t yy_accept[96] =
    {   0,
        0,    0,   58,   57,   56,   41,   57,   37,   38,   57,
       43,   44,   35,   33,   51,   34,   53,   36,   11,   11,
       55,   52,   50,   54,   49,    7,   45,   46,   39,    7,
        7,    7,    7,    7,   47,   40,   48,   42,   28,    0,
        8,    0,   19,   25,   20,    0,    0,   17,   15,   16,
       13,    1,   18,   14,   11,    0,    0,   31,   30,   27,
       29,   32,    7,   21,    5,    7,    7,    2,    7,   22,
       26,    9,    0,   13,    0,    0,   12,   10,   23,   24,
        7,    7,    7,    0,   13,    0,    0,   14,    3,    4,
        7,    0,   13,    6,    0

    } ;

static yyconst flex_int32_t yy_ec[256] =
    {   0,
        1,    1,    1,    1,    1,    1,    1,    1,    2,    3,
        2,    2,    1,    1,    1,    1,    1,    1,    1,    1,
        1,    1,    1,    1,    1,    1,    1,    1,    1,    1,
        1,    2,    4,    5,    1,    1,    6,    7,    8,    9,
       10,   11,   12,   13,   14,   15,   16,   17,   18,   18,
       18,   18,   18,   18,   18,   18,   18,   19,   20,   21,
       22,   23,    1,    1,   24,   24,   24,   24,   25,   24,
       26,   26,   26,   26,   26,   26,   26,   26,   26,   26,
       26,   26,   26,   26,   26,   26,   26,   27,   26,   26,
       28,   29,   30,   31,   26,    1,   24,   24,   24,   32,

       33,   34,   35,   36,   37,   26,   26,   38,   26,   26,
       39,   26,   26,   26,   40,   41,   26,   26,   42,   27,
       26,   26,   43,   44,   45,   46,    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 flex_int32_t yy_meta[47] =
    {   0,
        1,    1,    1,    1,    1,    1,    1,    2,    1,    1,
        1,    1,    1,    1,    1,    1,    3,    3,    1,    1,
        1,    1,    1,    3,    3,    4,    4,    1,    1,    1,
        1,    3,    3,    3,    4,    4,    4,    4,    4,    4,
        4,    4,    1,    1,    1,    1
    } ;

static yyconst flex_int16_t yy_base[100] =
    {   0,
        0,    0,  160,  161,  161,  137,   42,  136,   41,  128,
      161,  161,  134,  133,  161,  132,   32,   40,   39,   43,
      161,  161,   31,  131,   47,    0,  161,  161,  130,  112,
      112,  110,  114,  107,  161,   33,  161,  161,  161,   54,
      161,  124,  161,  161,  161,   57,   70,  161,  161,  161,
       57,  161,  161,   62,   74,   84,    0,  102,  161,  161,
      161,   95,    0,  161,    0,   75,   65,    0,   67,  161,
      161,  161,   91,   93,  102,   67,   76,    0,  161,  161,
       67,   58,   50,   95,  104,  111,  113,  115,    0,    0,
       48,  117,  119,    0,  161,  137,  141,  143,   64

    } ;

static yyconst flex_int16_t yy_def[100] =
    {   0,
       95,    1,   95,   95,   95,   95,   96,   95,   95,   97,
       95,   95,   95,   95,   95,   95,   95,   95,   95,   95,
       95,   95,   95,   95,   95,   98,   95,   95,   95,   98,
       98,   98,   98,   98,   95,   95,   95,   95,   95,   96,
       95,   96,   95,   95,   95,   97,   97,   95,   95,   95,
       95,   95,   95,   95,   95,   95,   99,   95,   95,   95,
       95,   95,   98,   95,   98,   98,   98,   98,   98,   95,
       95,   95,   95,   95,   95,   95,   95,   99,   95,   95,
       98,   98,   98,   95,   95,   95,   95,   95,   98,   98,
       98,   95,   95,   98,    0,   95,   95,   95,   95

    } ;

static yyconst flex_int16_t yy_nxt[208] =
    {   0,
        4,    5,    5,    6,    7,    8,    9,   10,   11,   12,
       13,   14,   15,   16,   17,   18,   19,   20,   21,   22,
       23,   24,   25,   26,   26,   26,   26,   27,    4,   28,
       29,   30,   31,   26,   32,   26,   33,   26,   26,   26,
       26,   34,   35,   36,   37,   38,   41,   44,   51,   51,
       52,   58,   59,   54,   70,   55,   55,   54,   41,   55,
       55,   53,   45,   56,   72,   57,   78,   56,   61,   62,
       42,   56,   95,   51,   51,   56,   71,   46,   74,   74,
       94,   73,   42,   77,   77,   47,   75,   91,   54,   73,
       55,   55,   77,   77,   75,   76,   90,   76,   56,   89,

       77,   77,   84,   83,   84,   82,   56,   85,   85,   74,
       74,   85,   85,   87,   81,   87,   80,   86,   88,   88,
       85,   85,   92,   79,   92,   86,   95,   93,   93,   88,
       88,   88,   88,   93,   93,   93,   93,   40,   40,   40,
       40,   46,   69,   46,   46,   63,   63,   68,   67,   66,
       65,   64,   60,   50,   49,   48,   47,   43,   39,   95,
        3,   95,   95,   95,   95,   95,   95,   95,   95,   95,
       95,   95,   95,   95,   95,   95,   95,   95,   95,   95,
       95,   95,   95,   95,   95,   95,   95,   95,   95,   95,
       95,   95,   95,   95,   95,   95,   95,   95,   95,   95,

       95,   95,   95,   95,   95,   95,   95
    } ;

static yyconst flex_int16_t yy_chk[208] =
    {   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,    7,    9,   17,   17,
       18,   23,   23,   19,   36,   19,   19,   20,   40,   20,
       20,   18,    9,   19,   46,   19,   99,   20,   25,   25,
        7,   19,   47,   51,   51,   20,   36,   47,   54,   54,
       91,   51,   40,   76,   76,   46,   54,   83,   55,   51,
       55,   55,   77,   77,   54,   56,   82,   56,   55,   81,

       56,   56,   73,   69,   73,   67,   55,   73,   73,   74,
       74,   84,   84,   75,   66,   75,   62,   74,   75,   75,
       85,   85,   86,   58,   86,   74,   42,   86,   86,   87,
       87,   88,   88,   92,   92,   93,   93,   96,   96,   96,
       96,   97,   34,   97,   97,   98,   98,   33,   32,   31,
       30,   29,   24,   16,   14,   13,   10,    8,    6,    3,
       95,   95,   95,   95,   95,   95,   95,   95,   95,   95,
       95,   95,   95,   95,   95,   95,   95,   95,   95,   95,
       95,   95,   95,   95,   95,   95,   95,   95,   95,   95,
       95,   95,   95,   95,   95,   95,   95,   95,   95,   95,

       95,   95,   95,   95,   95,   95,   95
    } ;

static yy_state_type yy_last_accepting_state;
static char *yy_last_accepting_cpos;

extern int yy_flex_debug;
int yy_flex_debug = 0;

/* 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
char *yytext;
#line 1 "calc_flex.l"
#line 3 "calc_flex.l"

#ifndef YY_NO_UNISTD_H
#define YY_NO_UNISTD_H
#endif/*YY_NO_UNISTD_H*/

#include "ucvm_type.h"
#include "calc_yacc.h"

void skip_comment(void);
void skip_spaceSS(void);

void save_tokenID(const char *);

void save_tokenCS(const char *);
void save_tokenCC(const char *);

void save_tokenCI(const char *);
void save_tokenCH(const char *);
void save_tokenCF(const char *);

void save_tokenOP(const char *);

void save_tokenAS(short);

long my_strTOint(const char *);
long my_hexTOint(const char *);
Real my_strTOdbl(const char *);

#line 561 "calc_flex.c"

#define INITIAL 0

#ifndef YY_NO_UNISTD_H
/* Special case for "unistd.h", since it is non-ANSI. We include it way
 * down here because we want the user's section 1 to have been scanned first.
 * The user has a chance to override it with an option.
 */
#include <unistd.h>
#endif

#ifndef YY_EXTRA_TYPE
#define YY_EXTRA_TYPE void *
#endif