/*
* Copyright (c) 1994 Powerdog Industries. All rights reserved.
*
* Redistribution and use in source and binary forms, without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* 3. All advertising materials mentioning features or use of this
* software must display the following acknowledgement:
* This product includes software developed by Powerdog Industries.
* 4. The name of Powerdog Industries may not be used to endorse or
* promote products derived from this software without specific prior
* written permission.
*
* THIS SOFTWARE IS PROVIDED BY POWERDOG INDUSTRIES ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE POWERDOG INDUSTRIES BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef lint
/*
static char copyright[] =
"@(#) Copyright (c) 1994 Powerdog Industries. All rights reserved.";
static char sccsid[] = "@(#)strptime.c 1.0 (Powerdog) 94/03/27";
*/
#endif /* not lint */
#include <time.h>
#include <ctype.h>
#include <locale.h>
#include <string.h>
#ifndef strncasecmp
#include "strncasecmp.h"
#endif
#define asizeof(a) ((int)(sizeof (a) / sizeof ((a)[0])))
struct dtconv {
char *abbrev_month_names[12];
char *month_names[12];
char *abbrev_weekday_names[7];
char *weekday_names[7];
char *time_format;
char *sdate_format;
char *dtime_format;
char *am_string;
char *pm_string;
char *ldate_format;
};
static struct dtconv En_US = {
{ "Jan", "Feb", "Mar", "Apr", "May", "Jun",
"Jul", "Aug", "Sep", "Oct", "Nov", "Dec" },
{ "January", "February", "March", "April",
"May", "June", "July", "August",
"September", "October", "November", "December" },
{ "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat" },
{ "Sunday", "Monday", "Tuesday", "Wednesday",
"Thursday", "Friday", "Saturday" },
"%H:%M:%S",
"%m/%d/%y",
"%a %b %e %T %Z %Y",
"AM",
"PM",
"%A, %B, %e, %Y"
};
char *
strptime(const char *buf, const char *fmt, struct tm *tm)
{
char c;
const char *ptr;
int i, len = 0;
ptr = fmt;
while (*ptr != 0)
{
if (*buf == 0)
break;
c = *ptr++;
if (c != '%')
{
if (isspace(c))
while (*buf != 0 && isspace(*buf))
buf++;
else if (c != *buf++)
return 0;
continue;
}
c = *ptr++;
switch (c)
{
case 0:
case '%':
if (*buf++ != '%')
return 0;
break;
case 'C':
buf = strptime(buf, En_US.ldate_format, tm);
if (buf == 0)
return 0;
break;
case 'c':
buf = strptime(buf, "%x %X", tm);
if (buf == 0)
return 0;
break;
case 'D':
buf = strptime(buf, "%m/%d/%y", tm);
if (buf == 0)
return 0;
break;
case 'R':
buf = strptime(buf, "%H:%M", tm);
if (buf == 0)
return 0;
break;
case 'r':
buf = strptime(buf, "%I:%M:%S %p", tm);
if (buf == 0)
return 0;
break;
case 'T':
buf = strptime(buf, "%H:%M:%S", tm);
if (buf == 0)
return 0;
break;
case 'X':
buf = strptime(buf, En_US.time_format, tm);
if (buf == 0)
return 0;
break;
case 'x':
buf = strptime(buf, En_US.sdate_format, tm);
if (buf == 0)
return 0;
break;
case 'j':
if (!isdigit(*buf))
return 0;
for (i = 0; *buf != 0 && isdigit(*buf); buf++)
{
i *= 10;
i += *buf - '0';
}
if (i > 365)
return 0;
tm->tm_yday = i;
break;
case 'M':
case 'S':
if (*buf == 0 || isspace(*buf))
break;
if (!isdigit(*buf))
return 0;
for (i = 0; *buf != 0 && isdigit(*buf); buf++)
{
i *= 10;
i += *buf - '0';
}
if (i > 59)
return 0;
if (c == 'M')
tm->tm_min = i;
else
tm->tm_sec = i;
if (*buf != 0 && isspace(*buf))
while (*ptr != 0 && !isspace(*ptr))
ptr++;
break;
case 'H':
case 'I':
case 'k':
case 'l':
if (!isdigit(*buf))
return 0;
for (i = 0; *buf != 0 && isdigit(*buf); buf++)
{
i *= 10;
i += *buf - '0';
}
if (c == 'H' || c == 'k') {
if (i > 23)
return 0;
} else if (i > 11)
return 0;
tm->tm_hour = i;
if (*buf != 0 && isspace(*buf))
while (*ptr != 0 && !isspace(*ptr))
ptr++;
break;
case 'p':
len = strlen(En_US.am_string);
if (strncasecmp(buf, En_US.am_string, len) == 0)
{
if (tm->tm_hour > 12)
return 0;
if (tm->tm_hour == 12)
tm->tm_hour = 0;
buf += len;
break;
}
len = strlen(En_US.pm_string);
if (strncasecmp(buf, En_US.pm_string, len) == 0)
{
if (tm->tm_hour > 12)
return 0;
if (tm->tm_hour != 12)
tm->tm_hour += 12;
buf += len;
break;
}
return 0;
case 'A':
case 'a':
for (i = 0; i < asizeof(En_US.weekday_names); i++)
{
len = strlen(En_US.weekday_names[i]);
if (strncasecmp(buf,
En_US.weekday_names[i],
len) == 0)
break;
len = strlen(En_US.abbrev_weekday_names[i]);
if (strncasecmp(buf,
En_US.abbrev_weekday_names[i],
len) == 0)
break;
}
if (i == asizeof(En_US.weekday_names))
return 0;
tm->tm_wday = i;
buf += len;
break;
case 'd':
case 'e':
if (!isdigit(*buf))
return 0;
for (i = 0; *buf != 0 && isdigit(*buf); buf++)
{
i *= 10;
i += *buf - '0';
}
if (i > 31)
return 0;
tm->tm_mday = i;
if (*buf != 0 && isspace(*buf))
while (*ptr != 0 && !isspace(*ptr))
ptr++;
break;
case 'B':
case 'b':
case 'h':
for (i = 0; i < asizeof(En_US.month_names); i++)
{
len = strlen(En_US.month_names[i]);
if (strncasecmp(buf,
En_US.month_names[i],
len) == 0)
break;
len = strlen(En_US.abbrev_month_names[i]);
if (strncasecmp(buf,
En_US.abbrev_month_names[i],
len) == 0)
break;
}
if (i == asizeof(En_US.month_names))
return 0;
tm->tm_mon = i;
buf += len;
break;
case 'm':
if (!isdigit(*buf))
return 0;
for (i = 0; *buf != 0 && isdigit(*buf); buf++)
{
i *= 10;
i += *buf - '0';
}
if (i < 1 || i > 12)
return 0;
tm->tm_mon = i - 1;
if (*buf != 0 && isspace(*buf))
while (*ptr != 0 && !isspace(*ptr))
ptr++;
break;
case 'Y':
case 'y':
if (*buf == 0 || isspace(*buf))
break;
if (!isdigit(*buf))
return 0;
for (i = 0; *buf != 0 && isdigit(*buf); buf++)
{
i *= 10;
i += *buf - '0';
}
if (c == 'y' && i < 69) /* Unix Epoch pivot year */
i += 100;
if (c == 'Y')
i -= 1900;
if (i < 0)
return 0;
tm->tm_year = i;
if (*buf != 0 && isspace(*buf))
while (*ptr != 0 && !isspace(*ptr))
ptr++;
break;
}
}
return (char *) buf;
}