getdate.c

unix 下tar 执行程序的源代码

		}
		*yy_ps = yy_state;
		*++yy_pv = yyval;

		/*
		** we have a new state - find out what to do
		*/
	yy_newstate:
		if ( ( yy_n = yypact[ yy_state ] ) <= YYFLAG )
			goto yydefault;		/* simple state */
#if YYDEBUG
		/*
		** if debugging, need to mark whether new token grabbed
		*/
		yytmp = yychar < 0;
#endif
		if ( ( yychar < 0 ) && ( ( yychar = yylex() ) < 0 ) )
			yychar = 0;		/* reached EOF */
#if YYDEBUG
		if ( yydebug && yytmp )
		{
			register int yy_i;

			printf( "Received token " );
			if ( yychar == 0 )
				printf( "end-of-file\n" );
			else if ( yychar < 0 )
				printf( "-none-\n" );
			else
			{
				for ( yy_i = 0; yytoks[yy_i].t_val >= 0;
					yy_i++ )
				{
					if ( yytoks[yy_i].t_val == yychar )
						break;
				}
				printf( "%s\n", yytoks[yy_i].t_name );
			}
		}
#endif /* YYDEBUG */
		if ( ( ( yy_n += yychar ) < 0 ) || ( yy_n >= YYLAST ) )
			goto yydefault;
		if ( yychk[ yy_n = yyact[ yy_n ] ] == yychar )	/*valid shift*/
		{
			yychar = -1;
			yyval = yylval;
			yy_state = yy_n;
			if ( yyerrflag > 0 )
				yyerrflag--;
			goto yy_stack;
		}

	yydefault:
		if ( ( yy_n = yydef[ yy_state ] ) == -2 )
		{
#if YYDEBUG
			yytmp = yychar < 0;
#endif
			if ( ( yychar < 0 ) && ( ( yychar = yylex() ) < 0 ) )
				yychar = 0;		/* reached EOF */
#if YYDEBUG
			if ( yydebug && yytmp )
			{
				register int yy_i;

				printf( "Received token " );
				if ( yychar == 0 )
					printf( "end-of-file\n" );
				else if ( yychar < 0 )
					printf( "-none-\n" );
				else
				{
					for ( yy_i = 0;
						yytoks[yy_i].t_val >= 0;
						yy_i++ )
					{
						if ( yytoks[yy_i].t_val
							== yychar )
						{
							break;
						}
					}
					printf( "%s\n", yytoks[yy_i].t_name );
				}
			}
#endif /* YYDEBUG */
			/*
			** look through exception table
			*/
			{
				register int *yyxi = yyexca;

				while ( ( *yyxi != -1 ) ||
					( yyxi[1] != yy_state ) )
				{
					yyxi += 2;
				}
				while ( ( *(yyxi += 2) >= 0 ) &&
					( *yyxi != yychar ) )
					;
				if ( ( yy_n = yyxi[1] ) < 0 )
					YYACCEPT;
			}
		}

		/*
		** check for syntax error
		*/
		if ( yy_n == 0 )	/* have an error */
		{
			/* no worry about speed here! */
			switch ( yyerrflag )
			{
			case 0:		/* new error */
				yyerror( "syntax error" );
				goto skip_init;
			yyerrlab:
				/*
				** get globals into registers.
				** we have a user generated syntax type error
				*/
				yy_pv = yypv;
				yy_ps = yyps;
				yy_state = yystate;
				yynerrs++;
			skip_init:
			case 1:
			case 2:		/* incompletely recovered error */
					/* try again... */
				yyerrflag = 3;
				/*
				** find state where "error" is a legal
				** shift action
				*/
				while ( yy_ps >= yys )
				{
					yy_n = yypact[ *yy_ps ] + YYERRCODE;
					if ( yy_n >= 0 && yy_n < YYLAST &&
						yychk[yyact[yy_n]] == YYERRCODE)					{
						/*
						** simulate shift of "error"
						*/
						yy_state = yyact[ yy_n ];
						goto yy_stack;
					}
					/*
					** current state has no shift on
					** "error", pop stack
					*/
#if YYDEBUG
#	define _POP_ "Error recovery pops state %d, uncovers state %d\n"
					if ( yydebug )
						printf( _POP_, *yy_ps,
							yy_ps[-1] );
#	undef _POP_
#endif
					yy_ps--;
					yy_pv--;
				}
				/*
				** there is no state on stack with "error" as
				** a valid shift.  give up.
				*/
				YYABORT;
			case 3:		/* no shift yet; eat a token */
#if YYDEBUG
				/*
				** if debugging, look up token in list of
				** pairs.  0 and negative shouldn't occur,
				** but since timing doesn't matter when
				** debugging, it doesn't hurt to leave the
				** tests here.
				*/
				if ( yydebug )
				{
					register int yy_i;

					printf( "Error recovery discards " );
					if ( yychar == 0 )
						printf( "token end-of-file\n" );
					else if ( yychar < 0 )
						printf( "token -none-\n" );
					else
					{
						for ( yy_i = 0;
							yytoks[yy_i].t_val >= 0;
							yy_i++ )
						{
							if ( yytoks[yy_i].t_val
								== yychar )
							{
								break;
							}
						}
						printf( "token %s\n",
							yytoks[yy_i].t_name );
					}
				}
#endif /* YYDEBUG */
				if ( yychar == 0 )	/* reached EOF. quit */
					YYABORT;
				yychar = -1;
				goto yy_newstate;
			}
		}/* end if ( yy_n == 0 ) */
		/*
		** reduction by production yy_n
		** put stack tops, etc. so things right after switch
		*/
#if YYDEBUG
		/*
		** if debugging, print the string that is the user's
		** specification of the reduction which is just about
		** to be done.
		*/
		if ( yydebug )
			printf( "Reduce by (%d) \"%s\"\n",
				yy_n, yyreds[ yy_n ] );
#endif
		yytmp = yy_n;			/* value to switch over */
		yypvt = yy_pv;			/* $vars top of value stack */
		/*
		** Look in goto table for next state
		** Sorry about using yy_state here as temporary
		** register variable, but why not, if it works...
		** If yyr2[ yy_n ] doesn't have the low order bit
		** set, then there is no action to be done for
		** this reduction.  So, no saving & unsaving of
		** registers done.  The only difference between the
		** code just after the if and the body of the if is
		** the goto yy_stack in the body.  This way the test
		** can be made before the choice of what to do is needed.
		*/
		{
			/* length of production doubled with extra bit */
			register int yy_len = yyr2[ yy_n ];

			if ( !( yy_len & 01 ) )
			{
				yy_len >>= 1;
				yyval = ( yy_pv -= yy_len )[1];	/* $$ = $1 */
				yy_state = yypgo[ yy_n = yyr1[ yy_n ] ] +
					*( yy_ps -= yy_len ) + 1;
				if ( yy_state >= YYLAST ||
					yychk[ yy_state =
					yyact[ yy_state ] ] != -yy_n )
				{
					yy_state = yyact[ yypgo[ yy_n ] ];
				}
				goto yy_stack;
			}
			yy_len >>= 1;
			yyval = ( yy_pv -= yy_len )[1];	/* $$ = $1 */
			yy_state = yypgo[ yy_n = yyr1[ yy_n ] ] +
				*( yy_ps -= yy_len ) + 1;
			if ( yy_state >= YYLAST ||
				yychk[ yy_state = yyact[ yy_state ] ] != -yy_n )
			{
				yy_state = yyact[ yypgo[ yy_n ] ];
			}
		}
					/* save until reenter driver code */
		yystate = yy_state;
		yyps = yy_ps;
		yypv = yy_pv;
	}
	/*
	** code supplied by user is placed in this switch
	*/
	switch( yytmp )
	{
		
case 3:
# line 153 "getdate.y"
{
	    yyHaveTime++;
	} break;
case 4:
# line 156 "getdate.y"
{
	    yyHaveZone++;
	} break;
case 5:
# line 159 "getdate.y"
{
	    yyHaveDate++;
	} break;
case 6:
# line 162 "getdate.y"
{
	    yyHaveDay++;
	} break;
case 7:
# line 165 "getdate.y"
{
	    yyHaveRel++;
	} break;
case 9:
# line 171 "getdate.y"
{
	    yyHour = yypvt[-1].Number;
	    yyMinutes = 0;
	    yySeconds = 0;
	    yyMeridian = yypvt[-0].Meridian;
	} break;
case 10:
# line 177 "getdate.y"
{
	    yyHour = yypvt[-3].Number;
	    yyMinutes = yypvt[-1].Number;
	    yySeconds = 0;
	    yyMeridian = yypvt[-0].Meridian;
	} break;
case 11:
# line 183 "getdate.y"
{
	    yyHour = yypvt[-3].Number;
	    yyMinutes = yypvt[-1].Number;
	    yyMeridian = MER24;
	    yyDSTmode = DSToff;
	    yyTimezone = - (yypvt[-0].Number % 100 + (yypvt[-0].Number / 100) * 60);
	} break;
case 12:
# line 190 "getdate.y"
{
	    yyHour = yypvt[-5].Number;
	    yyMinutes = yypvt[-3].Number;
	    yySeconds = yypvt[-1].Number;
	    yyMeridian = yypvt[-0].Meridian;
	} break;
case 13:
# line 196 "getdate.y"
{
	    yyHour = yypvt[-5].Number;
	    yyMinutes = yypvt[-3].Number;
	    yySeconds = yypvt[-1].Number;
	    yyMeridian = MER24;
	    yyDSTmode = DSToff;
	    yyTimezone = - (yypvt[-0].Number % 100 + (yypvt[-0].Number / 100) * 60);
	} break;
case 14:
# line 206 "getdate.y"
{
	    yyTimezone = yypvt[-0].Number;
	    yyDSTmode = DSToff;
	} break;
case 15:
# line 210 "getdate.y"
{
	    yyTimezone = yypvt[-0].Number;
	    yyDSTmode = DSTon;
	} break;
case 16:
# line 216 "getdate.y"
{
	    yyDayOrdinal = 1;
	    yyDayNumber = yypvt[-0].Number;
	} break;
case 17:
# line 220 "getdate.y"
{
	    yyDayOrdinal = 1;
	    yyDayNumber = yypvt[-1].Number;
	} break;
case 18:
# line 224 "getdate.y"
{
	    yyDayOrdinal = yypvt[-1].Number;
	    yyDayNumber = yypvt[-0].Number;
	} break;
case 19:
# line 230 "getdate.y"
{
	    yyMonth = yypvt[-2].Number;
	    yyDay = yypvt[-0].Number;
	} break;
case 20:
# line 234 "getdate.y"
{
	    yyMonth = yypvt[-4].Number;
	    yyDay = yypvt[-2].Number;
	    yyYear = yypvt[-0].Number;
	} break;
case 21:
# line 239 "getdate.y"
{
	    yyMonth = yypvt[-1].Number;
	    yyDay = yypvt[-0].Number;
	} break;
case 22:
# line 243 "getdate.y"
{
	    yyMonth = yypvt[-3].Number;
	    yyDay = yypvt[-2].Number;
	    yyYear = yypvt[-0].Number;
	} break;
case 23:
# line 248 "getdate.y"
{
	    yyMonth = yypvt[-0].Number;
	    yyDay = yypvt[-1].Number;
	} break;
case 24:
# line 252 "getdate.y"
{
	    yyMonth = yypvt[-1].Number;
	    yyDay = yypvt[-2].Number;
	    yyYear = yypvt[-0].Number;
	} break;
case 25:
# line 259 "getdate.y"
{
	    yyRelSeconds = -yyRelSeconds;
	    yyRelMonth = -yyRelMonth;
	} break;
case 27:
# line 266 "getdate.y"
{
	    yyRelSeconds += yypvt[-1].Number * yypvt[-0].Number * 60L;
	} break;
case 28:
# line 269 "getdate.y"
{
	    yyRelSeconds += yypvt[-1].Number * yypvt[-0].Number * 60L;
	} break;
case 29:
# line 272 "getdate.y"
{
	    yyRelSeconds += yypvt[-0].Number * 60L;
	} break;
case 30:
# line 275 "getdate.y"
{
	    yyRelSeconds += yypvt[-1].Number;
	} break;
case 31:
# line 278 "getdate.y"
{
	    yyRelSeconds += yypvt[-1].Number;
	} break;
case 32:
# line 281 "getdate.y"
{
	    yyRelSeconds++;
	} break;
case 33:
# line 284 "getdate.y"
{
	    yyRelMonth += yypvt[-1].Number * yypvt[-0].Number;
	} break;
case 34:
# line 287 "getdate.y"
{
	    yyRelMonth += yypvt[-1].Number * yypvt[-0].Number;
	} break;
case 35:
# line 290 "getdate.y"
{
	    yyRelMonth += yypvt[-0].Number;
	} break;
case 36:
# line 295 "getdate.y"
{
	    if (yyHaveTime && yyHaveDate && !yyHaveRel)
		yyYear = yypvt[-0].Number;
	    else {
		if(yypvt[-0].Number>10000) {
		    time_t date_part;

		    date_part= yypvt[-0].Number/10000;
		    yyHaveDate++;
		    yyDay= (date_part)%100;
		    yyMonth= (date_part/100)%100;
		    yyYear = date_part/10000;
		} 
	        yyHaveTime++;
		if (yypvt[-0].Number < 100) {
		    yyHour = yypvt[-0].Number;
		    yyMinutes = 0;
		}
		else {
		    yyHour = yypvt[-0].Number / 100;
		    yyMinutes = yypvt[-0].Number % 100;
		}
		yySeconds = 0;
		yyMeridian = MER24;
	    }
	} break;
case 37:
# line 323 "getdate.y"
{
	    yyval.Meridian = MER24;
	} break;
case 38:
# line 326 "getdate.y"
{
	    yyval.Meridian = yypvt[-0].Meridian;
	} break;
	}
	goto yystack;		/* reset registers in driver code */
}