patch-2.3.14 linux/net/khttpd/rfc_time.c

• Lines: 228
• Date: Wed Aug 18 09:51:31 1999
• Orig file: v2.3.13/linux/net/khttpd/rfc_time.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.3.13/linux/net/khttpd/rfc_time.c linux/net/khttpd/rfc_time.c
@@ -0,0 +1,227 @@
+/*
+
+Functions related to time:
+
+1) rfc (string) time to unix-time
+2) unix-time to rfc (string) time
+3) current time to rfc (string) time for the "Date:" header
+
+*/
+
+/****************************************************************
+ *	This program is free software; you can redistribute it and/or modify
+ *	it under the terms of the GNU General Public License as published by
+ *	the Free Software Foundation; either version 2, or (at your option)
+ *	any later version.
+ *
+ *	This program is distributed in the hope that it will be useful,
+ *	but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *	GNU General Public License for more details.
+ *
+ *	You should have received a copy of the GNU General Public License
+ *	along with this program; if not, write to the Free Software
+ *	Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ ****************************************************************/
+
+#include <linux/time.h>
+#include <linux/kernel.h>
+#include <linux/malloc.h>
+#include <linux/ctype.h>
+
+
+#include "times.h"
+#include "prototypes.h"
+static char *dayName[7] = {
+	"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"
+};
+
+static char *monthName[12] = {
+	"Jan", "Feb", "Mar", "Apr", "May", "Jun",
+	"Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
+};
+
+
+char CurrentTime[64];
+int  CurrentTime_i;
+
+
+static char itoa_h[60]={'0','0','0','0','0','0','0','0','0','0',
+		 '1','1','1','1','1','1','1','1','1','1',
+		 '2','2','2','2','2','2','2','2','2','2',
+		 '3','3','3','3','3','3','3','3','3','3',
+		 '4','4','4','4','4','4','4','4','4','4',
+		 '5','5','5','5','5','5','5','5','5','5'};
+		
+static char itoa_l[60]={'0','1','2','3','4','5','6','7','8','9',
+		 '0','1','2','3','4','5','6','7','8','9',
+		 '0','1','2','3','4','5','6','7','8','9',
+		 '0','1','2','3','4','5','6','7','8','9',
+		 '0','1','2','3','4','5','6','7','8','9',
+		 '0','1','2','3','4','5','6','7','8','9'};
+void time_Unix2RFC(const time_t Zulu,char *Buffer)
+{
+	int Y=0,M=0,D=0;
+	int H=0,Min=0,S=0,WD=0;
+	int I,I2;
+	time_t rest;
+	
+	
+		
+	I=0;
+	while (I<KHTTPD_NUMYEARS)
+	{
+		if (TimeDays[I][0]>Zulu) 
+		   break;
+		I++;
+	}
+	
+	Y=--I;
+	if (I<0) 
+	{
+		Y=0;
+		goto BuildYear;
+	}
+	I2=0;
+	while (I2<=12)
+	{
+		if (TimeDays[I][I2]>Zulu) 
+		   break;
+		I2++;
+	}			   
+	
+	M=I2-1;
+	
+	rest=Zulu - TimeDays[Y][M];
+	WD=WeekDays[Y][M];
+	D=rest/86400;
+	rest=rest%86400;
+	WD+=D;
+	WD=WD%7;
+	H=rest/3600;
+	rest=rest%3600;
+	Min=rest/60;
+	rest=rest%60;
+	S=rest;
+	
+BuildYear:
+	Y+=KHTTPD_YEAROFFSET;
+	
+	
+	/* Format:  Day, 01 Mon 1999 01:01:01 GMT */
+	
+/*	
+	We want to do 
+	
+	sprintf( Buffer, "%s, %02i %s %04i %02i:%02i:%02i GMT",
+		dayName[ WD ], D+1, monthName[ M ], Y,
+		H, Min, S
+	);
+	
+	but this is very expensive. Since the string is fixed length,
+	it is filled manually.
+*/
+	Buffer[0]=dayName[WD][0];
+	Buffer[1]=dayName[WD][1];
+	Buffer[2]=dayName[WD][2];
+	Buffer[3]=',';
+	Buffer[4]=' ';
+	Buffer[5]=itoa_h[D+1];
+	Buffer[6]=itoa_l[D+1];
+	Buffer[7]=' ';
+	Buffer[8]=monthName[M][0];
+	Buffer[9]=monthName[M][1];
+	Buffer[10]=monthName[M][2];
+	Buffer[11]=' ';
+	Buffer[12]=itoa_l[Y/1000];
+	Buffer[13]=itoa_l[(Y/100)%10];
+	Buffer[14]=itoa_l[(Y/10)%10];
+	Buffer[15]=itoa_l[Y%10];
+	Buffer[16]=' ';
+	Buffer[17]=itoa_h[H];
+	Buffer[18]=itoa_l[H];
+	Buffer[19]=':';
+	Buffer[20]=itoa_h[Min];
+	Buffer[21]=itoa_l[Min];
+	Buffer[22]=':';
+	Buffer[23]=itoa_h[S];
+	Buffer[24]=itoa_l[S];
+	Buffer[25]=' ';
+	Buffer[26]='G';
+	Buffer[27]='M';
+	Buffer[28]='T';
+	Buffer[29]=0;
+	
+	
+		
+	
+}
+
+void UpdateCurrentDate(void)
+{
+   struct timeval tv;
+   
+   do_gettimeofday(&tv);
+   if (CurrentTime_i!=tv.tv_sec)
+	   time_Unix2RFC(tv.tv_sec,CurrentTime);
+   
+   CurrentTime_i = tv.tv_sec;
+}
+
+static int MonthHash[32] = {0,0,7,0,0,0,0,0,0,0,0,3,0,0,0,2,6,0,5,0,9,8,4,0,0,11,1,10,0,0,0,0};
+
+#define is_digit(c)	((c) >= '0' && (c) <= '9')
+
+__inline static int skip_atoi(char **s)
+{
+	int i=0;
+
+	while (is_digit(**s))
+		i = i*10 + *((*s)++) - '0';
+	return i;
+}
+
+time_t mimeTime_to_UnixTime(char *Q)
+{
+	int Y,M,D,H,Min,S;
+	unsigned int Hash;
+	time_t Temp;
+	char *s,**s2;
+	
+	s=Q;
+	s2=&s;
+	
+	if (strlen(s)<30) return 0;
+	if (s[3]!=',') return 0;
+	if (s[19]!=':') return 0;
+	
+	s+=5; /* Skip day of week */
+	D = skip_atoi(s2);  /*  Day of month */
+	s++;
+	Hash = (unsigned char)s[0]+(unsigned char)s[2];
+	Hash = (Hash<<1) + (unsigned char)s[1];
+	Hash = (Hash&63)>>1;
+	M = MonthHash[Hash];
+	s+=4;
+	Y = skip_atoi(s2); /* Year */
+	s++;
+	H = skip_atoi(s2); /* Hour */
+	s++;
+	Min = skip_atoi(s2); /* Minutes */
+	s++;
+	S = skip_atoi(s2); /* Seconds */
+	s++;
+	if ((s[0]!='G')||(s[1]!='M')||(s[2]!='T')) 
+	{	
+  		return 0; /* No GMT */
+  	}
+
+	if (Y<KHTTPD_YEAROFFSET) Y = KHTTPD_YEAROFFSET;
+	if (Y>KHTTPD_YEAROFFSET+9) Y = KHTTPD_YEAROFFSET+9;
+	
+	Temp = 	TimeDays[Y-KHTTPD_YEAROFFSET][M];
+	Temp += D*86400+H*3600+Min*60+S;
+	
+	return Temp;  
+}