css_lex.c

著名的标准C＋＋的html解析器

/* A lexical scanner generated by flex */

/* Scanner skeleton version:
 * $Header: /cvsroot/htmlcxx/htmlcxx/css/css_lex.c,v 1.4 2006/06/16 15:23:16 davi Exp $
 */

#define FLEX_SCANNER
#define YY_FLEX_MAJOR_VERSION 2
#define YY_FLEX_MINOR_VERSION 5

#include <stdio.h>
#include <unistd.h>


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


#ifdef __cplusplus

#include <stdlib.h>

/* 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)


#define YY_USES_REJECT

#define yywrap() 1
#define YY_SKIP_YYWRAP
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 43
#define YY_END_OF_BUFFER 44
static yyconst short int yy_acclist[271] =
    {   0,
        2,    2,   44,   42,   43,   37,   42,   43,   38,   43,
       42,   43,   42,   43,   36,   42,   43,   42,   43,   36,
       42,   43,   36,   42,   43,   42,   43,   36,   42,   43,
        9,   42,   43,   36,   42,   43,   42,   43,   42,   43,
       42,   43,    7,   42,   43,    7,   42,   43,    7,   42,
       43,    2,   43,    3,   43,   36,   42,   43,   42,   43,
       36,   42,   43,   37,    8,   31,   32,    9,   32,    1,
       41,   10,    9,    7,    7,    7,    7,    7,    2,    3,
        3,    4,   24,   31,   25,   32,    9,   25,   32,    8,
       31,   31,    8,   40,   32,   32,   32,   32,   32,   32,

       32,    9,16397,16401,16402,16399,16396,16398,16395,16400,
        7,    7,    7,    7,    7,   24,   31,   24,   31,   25,
       32,   25,   32,   25,   32,   25,   32,   25,   32,   25,
       32,   25,   32,   31,   32,16397,   32,16401,   32,16402,
       32,16399,   32,16396,   32,16398,   32,16395,   32,16400,
       32, 8205, 8205, 8209, 8209, 8210, 8210, 8207, 8207, 8204,
     8204, 8206, 8206, 8203, 8203, 8208, 8208,   39,    7,    7,
       24,   31,   25,   32,16397,   25,   32,16401,   25,   32,
    16402,   25,   32,16399,   25,   32,16396,   25,   32,16398,
       25,   32,16395,   25,   32,16400,   25,   32,   31, 8205,

       32, 8209,   32, 8210,   32, 8207,   32, 8204,   32, 8206,
       32, 8203,   32, 8208,   32,   32,   26,    7,    7,   24,
       31, 8205,   25,   32, 8209,   25,   32, 8210,   25,   32,
     8207,   25,   32, 8204,   25,   32, 8206,   25,   32, 8203,
       25,   32, 8208,   25,   32,   25,   32,   19,   26,    7,
       34,   34,   28,    5,   33,   21,   28,   27,   33,   33,
       20,   27,    6,   35,   29,   22,   29,   30,   23,   30
    } ;

static yyconst short int yy_accept[318] =
    {   0,
        1,    1,    1,    2,    3,    3,    3,    4,    6,    9,
       11,   13,   15,   18,   20,   23,   26,   28,   31,   34,
       37,   39,   41,   43,   46,   49,   52,   54,   56,   59,
       61,   64,   65,   65,   65,   65,   66,   66,   67,   67,
       67,   67,   67,   68,   70,   70,   71,   72,   73,   73,
       74,   74,   74,   74,   74,   74,   74,   74,   74,   74,
       74,   74,   75,   76,   77,   77,   78,   79,   80,   81,
       82,   83,   85,   85,   87,   90,   90,   90,   90,   90,
       90,   90,   90,   91,   91,   91,   92,   93,   93,   94,
       94,   94,   95,   96,   97,   98,   99,  100,  101,  102,

      103,  104,  105,  106,  107,  108,  109,  110,  111,  111,
      111,  111,  111,  111,  111,  112,  113,  114,  115,  116,
      118,  120,  122,  124,  126,  128,  130,  132,  134,  134,
      134,  134,  134,  134,  134,  135,  135,  137,  139,  141,
      143,  145,  147,  149,  151,  152,  153,  154,  155,  156,
      157,  158,  159,  160,  161,  162,  163,  164,  165,  166,
      167,  168,  168,  168,  168,  168,  169,  169,  170,  171,
      171,  171,  173,  176,  179,  182,  185,  188,  191,  194,
      197,  199,  199,  199,  199,  199,  199,  199,  200,  200,
      202,  204,  206,  208,  210,  212,  214,  216,  217,  217,

      217,  218,  218,  218,  219,  220,  220,  220,  220,  220,
      220,  220,  220,  220,  220,  222,  225,  228,  231,  234,
      237,  240,  243,  246,  248,  248,  248,  250,  250,  250,
      250,  250,  250,  250,  251,  251,  251,  251,  251,  251,
      251,  252,  252,  252,  252,  252,  252,  252,  252,  253,
      253,  253,  253,  253,  254,  254,  254,  255,  255,  255,
      255,  255,  256,  256,  256,  256,  256,  256,  256,  256,
      256,  258,  258,  258,  258,  258,  259,  259,  259,  259,
      259,  259,  260,  260,  260,  261,  261,  261,  263,  263,
      263,  263,  263,  263,  263,  263,  263,  263,  263,  264,

      264,  264,  264,  264,  264,  265,  265,  265,  265,  266,
      266,  268,  268,  268,  269,  271,  271
    } ;

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,    5,    6,    7,    8,    9,   10,    9,   11,   12,
       13,   14,   15,   16,   17,   18,   19,   20,   20,   20,
       20,   20,   20,   20,   20,   20,   20,   21,   15,   22,
        9,   23,    9,   24,   26,   27,   28,   29,   30,   31,
       32,   33,   34,   33,   35,   36,   37,   38,   39,   40,
       33,   41,   42,   43,   44,   45,   33,   46,   33,   33,
        9,   25,    9,    9,    9,    9,   26,   27,   28,   29,

       30,   31,   32,   33,   34,   33,   35,   36,   37,   38,
       39,   40,   33,   41,   42,   43,   44,   45,   33,   46,
       33,   33,   15,    9,   15,    9,    1,    1,    1,    1,
        1,    1,    1,    1,    1,    1,    1,    1,    1,    1,
        1,    1,    1,    1,    1,    1,    1,    1,    1,    1,
        1,    1,    1,    1,    1,    1,    1,    1,    1,    1,
       47,   47,   47,   47,   47,   47,   47,   47,   47,   47,
       47,   47,   47,   47,   47,   47,   47,   47,   47,   47,
       47,   47,   47,   47,   47,   47,   47,   47,   47,   47,
       47,   47,   47,   47,   47,   47,   47,   47,   47,   47,

       47,   47,   47,   47,   47,   47,   47,   47,   47,   47,
       47,   47,   47,   47,   47,   47,   47,   47,   47,   47,
       47,   47,   47,   47,   47,   47,   47,   47,   47,   47,
       47,   47,   47,   47,   47,   47,   47,   47,   47,   47,
       47,   47,   47,   47,   47,   47,   47,   47,   47,   47,