scan-gram.c

bison 2.0 主要可以用来做语法分析用的

#ifndef YY_NO_UNPUT
static void yyunput YY_PROTO(( int c, char *buf_ptr ));
#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
#ifdef __cplusplus
static int yyinput YY_PROTO(( void ));
#else
static int input YY_PROTO(( void ));
#endif
#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
/* This used to be an fputs(), but since the string might contain NUL's,
 * we now use fwrite().
 */
#define ECHO (void) fwrite( yytext, yyleng, 1, yyout )
#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 ( yy_current_buffer->yy_is_interactive ) \
		{ \
		int c = '*', n; \
		for ( n = 0; n < max_size && \
			     (c = getc( yyin )) != EOF && c != '\n'; ++n ) \
			buf[n] = (char) c; \
		if ( c == '\n' ) \
			buf[n++] = (char) c; \
		if ( c == EOF && ferror( yyin ) ) \
			YY_FATAL_ERROR( "input in flex scanner failed" ); \
		result = n; \
		} \
	else \
		{ \
		errno=0; \
		while ( (result = fread(buf, 1, max_size, yyin))==0 && ferror(yyin)) \
			{ \
			if( errno != EINTR) \
				{ \
				YY_FATAL_ERROR( "input in flex scanner failed" ); \
				break; \
				} \
			errno=0; \
			clearerr(yyin); \
			} \
		}
#endif

/* No semi-colon after return; correct usage is to write "yyterminate();" -
 * we don't want an extra ';' after the "return" because that will cause
 * some compilers to complain about unreachable statements.
 */
#ifndef yyterminate
#define yyterminate() return YY_NULL
#endif

/* Number of entries by which start-condition stack grows. */
#ifndef YY_START_STACK_INCR
#define YY_START_STACK_INCR 25
#endif

/* Report a fatal error. */
#ifndef YY_FATAL_ERROR
#define YY_FATAL_ERROR(msg) yy_fatal_error( msg )
#endif

/* Default declaration of generated scanner - a define so the user can
 * easily add parameters.
 */
#ifndef YY_DECL
#define YY_DECL int yylex YY_PROTO(( void ))
#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 \
	if ( yyleng > 0 ) \
		yy_current_buffer->yy_at_bol = \
				(yytext[yyleng - 1] == '\n'); \
	YY_USER_ACTION

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

#line 130 "scan-gram.l"


  /* Nesting level of the current code in braces.  */
  int braces_level IF_LINT (= 0);

  /* Parent context state, when applicable.  */
  int context_state IF_LINT (= 0);

  /* Token type to return, when applicable.  */
  int token_type IF_LINT (= 0);

  /* Location of most recent identifier, when applicable.  */
  location id_loc IF_LINT (= empty_location);

  /* Where containing code started, when applicable.  Its initial
     value is relevant only when yylex is invoked in the SC_EPILOGUE
     start condition.  */
  boundary code_start = scanner_cursor;

  /* Where containing comment or string or character literal started,
     when applicable.  */
  boundary token_start IF_LINT (= scanner_cursor);



  /*-----------------------.
  | Scanning white space.  |
  `-----------------------*/

#line 1064 "scan-gram.c"

	if ( yy_init )
		{
		yy_init = 0;

#ifdef YY_USER_INIT
		YY_USER_INIT;
#endif

		if ( ! yy_start )
			yy_start = 1;	/* first start state */

		if ( ! yyin )
			yyin = stdin;

		if ( ! yyout )
			yyout = stdout;

		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_current_state += YY_AT_BOL();
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 >= 455 )
					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] != 732 );

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. */

		if ( yy_flex_debug )
			{
			if ( yy_act == 0 )
				fprintf( stderr, "--scanner backing up\n" );
			else if ( yy_act < 106 )
				fprintf( stderr, "--accepting rule at line %d (\"%s\")\n",
				         yy_rule_linenum[yy_act], yytext );
			else if ( yy_act == 106 )
				fprintf( stderr, "--accepting default rule (\"%s\")\n",
				         yytext );
			else if ( yy_act == 107 )
				fprintf( stderr, "--(end of buffer or a NUL)\n" );
			else
				fprintf( stderr, "--EOF (start condition %d)\n", YY_START );
			}

		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;



/* Comments and white space.  */
case 1:
YY_RULE_SETUP
#line 162 "scan-gram.l"
warn_at (*loc, _("stray `,' treated as white space"));
	YY_BREAK
case 2:
#line 164 "scan-gram.l"
case 3:
YY_RULE_SETUP
#line 164 "scan-gram.l"
;
	YY_BREAK
case 4:
YY_RULE_SETUP
#line 165 "scan-gram.l"
{
    token_start = loc->start;
    context_state = YY_START;
    BEGIN SC_YACC_COMMENT;
  }
	YY_BREAK
/* #line directives are not documented, and may be withdrawn or
     modified in future versions of Bison.  */
case 5:
YY_RULE_SETUP
#line 173 "scan-gram.l"
{
    handle_syncline (yytext + sizeof "#line " - 1);
  }
	YY_BREAK

/*----------------------------.
  | Scanning Bison directives.  |
  `----------------------------*/


case 6:
YY_RULE_SETUP
#line 184 "scan-gram.l"
return PERCENT_NONASSOC;
	YY_BREAK
case 7:
YY_RULE_SETUP
#line 185 "scan-gram.l"
return PERCENT_DEBUG;
	YY_BREAK
case 8:
YY_RULE_SETUP
#line 186 "scan-gram.l"
return PERCENT_DEFAULT_PREC;
	YY_BREAK
case 9:
YY_RULE_SETUP
#line 187 "scan-gram.l"
return PERCENT_DEFINE;
	YY_BREAK
case 10:
YY_RULE_SETUP
#line 188 "scan-gram.l"
return PERCENT_DEFINES;
	YY_BREAK
case 11:
YY_RULE_SETUP
#line 189 "scan-gram.l"
token_type = PERCENT_DESTRUCTOR; BEGIN SC_PRE_CODE;
	YY_BREAK
case 12:
YY_RULE_SETUP
#line 190 "scan-gram.l"
return PERCENT_DPREC;
	YY_BREAK
case 13:
YY_RULE_SETUP
#line 191 "scan-gram.l"
return PERCENT_ERROR_VERBOSE;
	YY_BREAK
case 14:
YY_RULE_SETUP
#line 192 "scan-gram.l"
return PERCENT_EXPECT;
	YY_BREAK
case 15:
YY_RULE_SETUP
#line 193 "scan-gram.l"
return PERCENT_EXPECT_RR;
	YY_BREAK
case 16:
YY_RULE_SETUP
#line 194 "scan-gram.l"
return PERCENT_FILE_PREFIX;
	YY_BREAK
case 17:
YY_RULE_SETUP
#line 195 "scan-gram.l"
return PERCENT_YACC;
	YY_BREAK
case 18:
YY_RULE_SETUP
#line 196 "scan-gram.l"
token_type = PERCENT_INITIAL_ACTION; BEGIN SC_PRE_CODE;
	YY_BREAK
case 19:
YY_RULE_SETUP
#line 197 "scan-gram.l"
return PERCENT_GLR_PARSER;
	YY_BREAK
case 20:
YY_RULE_SETUP
#line 198 "scan-gram.l"
return PERCENT_LEFT;
	YY_BREAK
case 21:
YY_RULE_SETUP
#line 199 "scan-gram.l"
token_type = PERCENT_LEX_PARAM; BEGIN SC_PRE_CODE;
	YY_BREAK
case 22:
YY_RULE_SETUP
#line 200 "scan-gram.l"
return PERCENT_LOCATIONS;
	YY_BREAK
case 23:
YY_RULE_SETUP
#line 201 "scan-gram.l"
return PERCENT_MERGE;
	YY_BREAK
case 24:
YY_RULE_SETUP
#line 202 "scan-gram.l"
return PERCENT_NAME_PREFIX;
	YY_BREAK
case 25:
YY_RULE_SETUP
#line 203 "scan-gram.l"
return PERCENT_NO_DEFAULT_PREC;
	YY_BREAK
case 26:
YY_RULE_SETUP
#line 204 "scan-gram.l"
return PERCENT_NO_LINES;
	YY_BREAK
case 27:
YY_RULE_SETUP
#line 205 "scan-gram.l"
return PERCENT_NONASSOC;
	YY_BREAK
case 28:
YY_RULE_SETUP
#line 206 "scan-gram.l"
return PERCENT_NONDETERMINISTIC_PARSER;
	YY_BREAK
case 29:
YY_RULE_SETUP
#line 207 "scan-gram.l"
return PERCENT_NTERM;
	YY_BREAK