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/*
* parsedate.c
* author: Heiko Stoermer, innominate AG, stoermer@innominate.de
* 20000316
*
* 23 Aug 2000, modified by Kir <kir@sever.net>
*/
#include "udm_config.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include "udm_common.h"
#include "udm_parsedate.h"
#include "udm_xmalloc.h"
#include "udm_utils.h"
#include "udm_sdp.h"
#define BUFF 20
static int get_month(char * month)
{
if(strcmp(month,"Jan") == 0)
return 1;
else if(strcmp(month,"Feb") == 0)
return 2;
else if(strcmp(month,"Mar") == 0)
return 3;
else if(strcmp(month,"Apr") == 0)
return 4;
else if(strcmp(month,"May") == 0)
return 5;
else if(strcmp(month,"Jun") == 0)
return 6;
else if(strcmp(month,"Jul") == 0)
return 7;
else if(strcmp(month,"Aug") == 0)
return 8;
else if(strcmp(month,"Sep") == 0)
return 9;
else if(strcmp(month,"Oct") == 0)
return 10;
else if(strcmp(month,"Nov") == 0)
return 11;
else if(strcmp(month,"Dec") == 0)
return 12;
else
return 0;
}
/* Returns allocated pointer to string
* containing the sql-conformant datetime type.
*
* Processes nntp datestrings of the following types:
* 1: 17 Jun 1999 11:05:42 GMT
* 2: Wed, 08 Mar 2000 13:52:43 +0100
* 3: Tuesday, 28-Nov-95 9:15:26 GMT
*
* 23 Aug 2000, modified by Kir <kir@sever.net>
* to support the (3) date format
* Bug report was submitted by Nagy Erno <ned@elte.hu>
*/
char * UdmDateParse(const char * datestring)
{
/* buffers */
char year [BUFF] = "";
char month [BUFF] = "";
char date [BUFF] = "";
char timebuf[BUFF] = "";
char * tokens[4];
/* result */
char * res = NULL;
/* some ints for substring indices */
SDPALIGN pos = 0;
size_t allocsize = 0;
/* pointers for parsing */
char * next = NULL;
char * prev = NULL;
size_t len = 0;
/* working copy and copy-copy */
char * copy = NULL;
char * copyref = NULL;
/* we need this for the different types */
int offset = 0;
/* initialize everythign nicely */
tokens[0] = date;
tokens[1] = month;
tokens[2] = year;
tokens[3] = timebuf;
if(strlen(datestring))
{
/* select string type */
if((pos = (SDPALIGN)strchr(datestring,',')))
{
/* simply skip the first characters containing the weekday string */
offset = (int) ( (SDPALIGN)pos - (SDPALIGN)datestring);
offset += 2; /* skip comma and whitespace */
}
copy = UdmMalloc(strlen(datestring+offset)+1);
strcpy(copy,datestring+offset);
copyref = copy; /* save the pointer for deallocation later */
/* now we can start.*/
/* split up the string*/
pos = 0;
prev = copy;
next = strtok(copy," -");
while(pos < 4)
{
if((next = strtok(NULL," -")) == NULL) /* last element */
len = strlen(prev);
else
len = (size_t) (next-prev);
if(len > BUFF) /* unexpected token length*/
return NULL;
strncpy(tokens[pos],prev,len);
/* preparations for the next run*/
prev = next;
++pos;
/*next = strtok(NULL," ");*/
}
/* o.k., this type of parsing is no fexible enough... :(*/
/*
strncpy(date,datestring+offset,2);
date[2] = 0;
strncpy(month,datestring+offset+3,3);
month[3] = 0;
strncpy(year,datestring+offset+7,4);
year[4] = 0;
strncpy(timebuf,datestring+offset+12,8);
timebuf[8] = 0;
*/
if (strlen(year)==2){
/* We have two-digit year, need to convert to four-digit */
year[2]=year[0];
year[3]=year[1];
/* Here we assume that 70 and up are 19xx,
* and 00-69 are 20xx years. --kir.
*/
if (year[0]>'6'){
year[0]='1';
year[1]='9';
}
else{
year[0]='2';
year[1]='0';
}
}
/* we allocate 4 extra characters for separators and \0 */
allocsize = strlen(date)+strlen(month)+strlen(year)+strlen(timebuf)+ 4;
res = UdmMalloc(allocsize);
udm_snprintf(res,allocsize,"%s-%02i-%02i %s",year,get_month(month),atoi(date),timebuf);
res[allocsize-1] = '\0';
/* clean up nicely. we dont want memory leaks within 100 lines...*/
UDM_FREE(copyref);
} else {
if ((res = UdmMalloc(20)))
sprintf(res, "1970-01-01 00:01");
}
return res;
}
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