+/* PSPP - a program for statistical analysis.
+ Copyright (C) 2006, 2007, 2008, 2010, 2011 Free Software Foundation, Inc.
+
+ 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 3 of the License, 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, see <http://www.gnu.org/licenses/>. */
+
#include <config.h>
-#include "calendar.h"
+
+#include "data/calendar.h"
+
#include <assert.h>
#include <stdbool.h>
-#include "settings.h"
-#include "value.h"
+
+#include "data/settings.h"
+#include "data/val-type.h"
#include "gettext.h"
#define _(msgid) gettext (msgid)
/* Calculates and returns floor(a/b) for integer b > 0. */
static int
-floor_div (int a, int b)
+floor_div (int a, int b)
{
assert (b > 0);
return (a >= 0 ? a : a - b + 1) / b;
/* Calculates floor(a/b) and the corresponding remainder and
stores them into *Q and *R. */
static void
-floor_divmod (int a, int b, int *q, int *r)
+floor_divmod (int a, int b, int *q, int *r)
{
*q = floor_div (a, b);
*r = a - b * *q;
/* Returns true if Y is a leap year, false otherwise. */
static bool
-is_leap_year (int y)
+is_leap_year (int y)
{
return y % 4 == 0 && (y % 100 != 0 || y % 400 == 0);
}
static int
-raw_gregorian_to_offset (int y, int m, int d)
+raw_gregorian_to_offset (int y, int m, int d)
{
return (EPOCH - 1
+ 365 * (y - 1)
Gregorian calendar. Returns SYSMIS for dates before 14 Oct
1582. */
double
-calendar_gregorian_to_offset (int y, int m, int d,
- calendar_error_func *error, void *aux)
+calendar_gregorian_to_offset (int y, int m, int d, char **errorp)
{
/* Normalize year. */
- if (y >= 0 && y < 100)
+ if (y >= 0 && y < 100)
{
- int epoch = get_epoch ();
+ int epoch = settings_get_epoch ();
int century = epoch / 100 + (y < epoch % 100);
y += century * 100;
}
/* Normalize month. */
- if (m < 1 || m > 12)
+ if (m < 1 || m > 12)
{
- if (m == 0)
+ if (m == 0)
{
y--;
m = 12;
}
- else if (m == 13)
+ else if (m == 13)
{
y++;
m = 1;
}
else
{
- error (aux, _("Month %d is not in acceptable range of 0 to 13."), m);
+ if (errorp != NULL)
+ *errorp = xasprintf (_("Month %d is not in acceptable range of "
+ "0 to 13."), m);
return SYSMIS;
}
}
/* Normalize day. */
- if (d < 0 || d > 31)
+ if (d < 0 || d > 31)
{
- error (aux, _("Day %d is not in acceptable range of 0 to 31."), d);
+ if (errorp != NULL)
+ *errorp = xasprintf (_("Day %d is not in acceptable range of "
+ "0 to 31."), d);
return SYSMIS;
}
/* Validate date. */
- if (y < 1582 || (y == 1582 && (m < 10 || (m == 10 && d < 15))))
+ if (y < 1582 || (y == 1582 && (m < 10 || (m == 10 && d < 15))))
{
- error (aux, _("Date %04d-%d-%d is before the earliest acceptable "
- "date of 1582-10-15."), y, m, d);
+ if (errorp != NULL)
+ *errorp = xasprintf (_("Date %04d-%d-%d is before the earliest "
+ "acceptable date of 1582-10-15."), y, m, d);
return SYSMIS;
}
/* Calculate offset. */
+ if (errorp != NULL)
+ *errorp = NULL;
return raw_gregorian_to_offset (y, m, d);
}
/* Returns the number of days in the given YEAR from January 1 up
to (but not including) the first day of MONTH. */
static int
-cum_month_days (int year, int month)
+cum_month_days (int year, int month)
{
- static const int cum_month_days[12] =
+ static const int cum_month_days[12] =
{
0,
31, /* Jan */
Gregorian calendar year it is in. Dates both before and after
the epoch are supported. */
int
-calendar_offset_to_year (int ofs)
+calendar_offset_to_year (int ofs)
{
int d0;
int n400, d1;
/* Takes a count of days from 14 Oct 1582 and returns the month
it is in. */
int
-calendar_offset_to_month (int ofs)
+calendar_offset_to_month (int ofs)
{
int y, m, d, yd;
calendar_offset_to_gregorian (ofs, &y, &m, &d, &yd);
/* Takes a count of days from 14 Oct 1582 and returns the
corresponding day of the month. */
int
-calendar_offset_to_mday (int ofs)
+calendar_offset_to_mday (int ofs)
{
int y, m, d, yd;
calendar_offset_to_gregorian (ofs, &y, &m, &d, &yd);
return d;
}
+
+/* Returns the number of days in the specified month. */
+int
+calendar_days_in_month (int y, int m)
+{
+ static const int days_per_month[12]
+ = {31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
+
+ assert (m >= 1 && m <= 12);
+ return m == 2 && is_leap_year (y) ? 29 : days_per_month[m - 1];
+}
projects / pspp-builds.git / blobdiff