c.c

代码检索工具GLOBAL源码。可用来浏览分析LINUX源码。

 */

/*
 * scanner for C and yacc source code.
 */
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <stdio.h>
#ifdef STDC_HEADERS
#include <stdlib.h>
#endif
#include "global.h"
#include "anchor.h"
#include "incop.h"
#include "path2url.h"
#include "common.h"
#include "htags.h"
#include "../gtags-parser/c_res.h"

#define lex_symbol_generation_rule(x) c_ ## x
#include "lexcommon.h"

#ifdef ECHO
#undef ECHO
#endif
#define ECHO	echos(LEXTEXT)

#define YY_USER_ACTION DEFAULT_YY_USER_ACTION

static int last_directive;
static int brace_level;
/* Definitions */
#define C 1
#define C_COMMENT 2
#define CPP_COMMENT 3
#define SHELL_COMMENT 4
#define STRING 5
#define LITERAL 6
#define PREPROCESSOR_LINE 7

#define YACC_DECLARATIONS 8
#define YACC_RULES 9
#define YACC_PROLOGUE 10
#define BRACED_CODE 11

#define YY_NO_TOP_STATE 1
#define YY_STACK_USED 1
#line 545 "c.c"

/* 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 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 if ( ((result = fread( buf, 1, max_size, yyin )) == 0) \
		  && ferror( yyin ) ) \
		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) 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 69 "c.l"

 /* Backslash-newline */
#line 702 "c.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 >= 106 )
					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] != 232 );

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 71 "c.l"
DEFAULT_BACKSLASH_NEWLINE_ACTION
	YY_BREAK
/* Comment */

case 2:
YY_RULE_SETUP
#line 75 "c.l"
{ echos(comment_begin); ECHO; yy_push_state(C_COMMENT); }
	YY_BREAK

case 3:
YY_RULE_SETUP
#line 77 "c.l"
{ ECHO; echos(comment_end); yy_pop_state(); }
	YY_BREAK
case 4:
YY_RULE_SETUP
#line 78 "c.l"
{ put_char(LEXTEXT[0]); }
	YY_BREAK
case YY_STATE_EOF(C_COMMENT):
#line 79 "c.l"
{
		if (wflag)
			unexpected_eof(LINENO);
		yyterminate();
	}
	YY_BREAK

case 5:
YY_RULE_SETUP
#line 85 "c.l"
{ echos(comment_begin); ECHO; yy_push_state(CPP_COMMENT); }
	YY_BREAK

/* String */

case 6:
YY_RULE_SETUP
#line 90 "c.l"
{ ECHO; yy_push_state(STRING); }
	YY_BREAK

case 7:
YY_RULE_SETUP
#line 92 "c.l"
{ ECHO; yy_pop_state(); }
	YY_BREAK
case 8:
YY_RULE_SETUP
#line 93 "c.l"
{ put_char(LEXTEXT[0]); put_char(LEXTEXT[1]); }
	YY_BREAK
/* Literal */

case 9:
YY_RULE_SETUP
#line 97 "c.l"
{ ECHO; yy_push_state(LITERAL); }
	YY_BREAK

case 10:
YY_RULE_SETUP
#line 99 "c.l"
{ ECHO; yy_pop_state(); }
	YY_BREAK
case 11:
YY_RULE_SETUP
#line 100 "c.l"
{ put_char(LEXTEXT[0]); put_char(LEXTEXT[1]); }
	YY_BREAK
/* Preprocessing directive */

case 12:
YY_RULE_SETUP
#line 104 "c.l"
{
		int c;

		put_macro(LEXTEXT);
		/*
		 * #include|   <aaa/bbb.h>|
		 *         ~~~~~~~~~~~~~~~~
		 */
		while ((c = input()) && c != '\n' && isspace(c))
			echoc(c);
		if (c == '\n') {
			unput(c);
		} else if (c) {
			char path[MAXPATHLEN+1], *p = path;
			int sep = 0;

			if (c == '"')
				sep = c;
			else if (c == '<')
				sep = '>';
			put_char(c);

			/* pick up path name */
			while ((c = input()) && c != '\n' && c != sep)
				*p++ = c;
			*p = '\0';
			if (c == sep) {
				struct data *inc;
				const char *basename = locatestring(path, "/", MATCH_LAST);

				if (basename)
					basename++;
				else
					basename = path;
				inc = get_inc(basename);
				if (inc)
					put_include_anchor(inc, path);
				else
					echos(path);
				put_char(sep);
			} else {
				echos(path);
				if (c)
					unput(c);
			}
		}
	}
	YY_BREAK
case 13:
YY_RULE_SETUP
#line 151 "c.l"
{
		if ((last_directive = c_reserved_sharp(LEXTEXT, LEXLENG)) != 0)
			put_macro(LEXTEXT);
		else {
			ECHO;
			if (wflag)
				unknown_preprocessing_directive(LEXTEXT, LINENO);
		}
		yy_push_state(PREPROCESSOR_LINE);
	}
	YY_BREAK
/* Null directive */
case 14:
YY_RULE_SETUP
#line 162 "c.l"
{ put_macro(LEXTEXT); }
	YY_BREAK

/* Yacc directive */

case 15:
YY_RULE_SETUP
#line 167 "c.l"
{
		if (c_reserved_yacc(LEXTEXT, LEXLENG))
			put_reserved_word(LEXTEXT);
		else {
			ECHO;
			if (wflag)
				unknown_yacc_directive(LEXTEXT, LINENO);
		}
	}
	YY_BREAK
case 16:
YY_RULE_SETUP
#line 176 "c.l"
{
		struct anchor *a = anchor_get(LEXTEXT, LEXLENG, 0, LINENO);

		if (a) {
			put_anchor(gettag(a), a->type, LINENO);
			a->done = 1;
		} else {
			ECHO;
		}
	}
	YY_BREAK
case 17:
YY_RULE_SETUP
#line 186 "c.l"
{ put_brace(LEXTEXT); brace_level = 1; yy_push_state(BRACED_CODE); }
	YY_BREAK
case 18:
YY_RULE_SETUP
#line 187 "c.l"
{ put_brace(LEXTEXT); if (wflag) missing_left("{", LINENO); }
	YY_BREAK

case 19:
YY_RULE_SETUP
#line 189 "c.l"
{ put_brace(LEXTEXT); brace_level++; }
	YY_BREAK
case 20:
YY_RULE_SETUP
#line 190 "c.l"
{ put_brace(LEXTEXT); if (--brace_level == 0) yy_pop_state(); }
	YY_BREAK
case 21:
YY_RULE_SETUP
#line 191 "c.l"
{ put_reserved_word(LEXTEXT); yy_push_state(YACC_PROLOGUE); }
	YY_BREAK
case 22:
YY_RULE_SETUP
#line 192 "c.l"