/* PSPP - computes sample statistics.
Copyright (C) 2005 Free Software Foundation, Inc.
- Written by Ben Pfaff <blp@gnu.org>.
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License as
#include "missing-values.h"
#include <assert.h>
#include <stdlib.h>
-#include "str.h"
-
+#include <libpspp/assertion.h>
+#include "variable.h"
+#include <libpspp/str.h>
+
+/* Types of user-missing values.
+ Invisible--use access functions defined below instead. */
+enum mv_type
+ {
+ MVT_NONE = 0, /* No user-missing values. */
+ MVT_1 = 1, /* One user-missing value. */
+ MVT_2 = 2, /* Two user-missing values. */
+ MVT_3 = 3, /* Three user-missing values. */
+ MVT_RANGE = 4, /* A range of user-missing values. */
+ MVT_RANGE_1 = 5 /* A range plus an individual value. */
+ };
/* Initializes MV as a set of missing values for a variable of
the given WIDTH. Although only numeric variables and short
mv_init (struct missing_values *mv, int width)
{
assert (width >= 0 && width <= MAX_STRING);
- mv->type = MV_NONE;
+ mv->type = MVT_NONE;
mv->width = width;
}
+/* Removes any missing values from MV. */
void
-mv_set_type(struct missing_values *mv, enum mv_type type)
+mv_clear (struct missing_values *mv)
{
- mv->type = type;
+ mv->type = MVT_NONE;
}
-
/* Copies SRC to MV. */
void
mv_copy (struct missing_values *mv, const struct missing_values *src)
bool
mv_is_empty (const struct missing_values *mv)
{
- return mv->type == MV_NONE;
+ return mv->type == MVT_NONE;
}
/* Returns the width of the missing values that MV may
return false;
switch (mv->type)
{
- case MV_NONE:
- case MV_1:
- case MV_2:
- case MV_RANGE:
+ case MVT_NONE:
+ case MVT_1:
+ case MVT_2:
+ case MVT_RANGE:
mv->values[mv->type & 3] = *v;
mv->type++;
return true;
- case MV_3:
- case MV_RANGE_1:
+ case MVT_3:
+ case MVT_RANGE_1:
return false;
}
- abort ();
+ NOT_REACHED ();
}
/* Attempts to add S to the set of string missing values MV. S
return false;
switch (mv->type)
{
- case MV_NONE:
- case MV_1:
+ case MVT_NONE:
+ case MVT_1:
mv->values[1].f = low;
mv->values[2].f = high;
mv->type |= 4;
return true;
- case MV_2:
- case MV_3:
- case MV_RANGE:
- case MV_RANGE_1:
+ case MVT_2:
+ case MVT_3:
+ case MVT_RANGE:
+ case MVT_RANGE_1:
return false;
}
- abort ();
+ NOT_REACHED ();
}
/* Returns true if MV contains an individual value,
{
switch (mv->type)
{
- case MV_1:
- case MV_2:
- case MV_3:
- case MV_RANGE_1:
+ case MVT_1:
+ case MVT_2:
+ case MVT_3:
+ case MVT_RANGE_1:
return true;
- case MV_NONE:
- case MV_RANGE:
+ case MVT_NONE:
+ case MVT_RANGE:
return false;
}
- abort ();
+ NOT_REACHED ();
}
/* Removes one individual value from MV and stores it in *V.
{
switch (mv->type)
{
- case MV_RANGE:
- case MV_RANGE_1:
+ case MVT_RANGE:
+ case MVT_RANGE_1:
return true;
- case MV_NONE:
- case MV_1:
- case MV_2:
- case MV_3:
+ case MVT_NONE:
+ case MVT_1:
+ case MVT_2:
+ case MVT_3:
return false;
}
- abort ();
+ NOT_REACHED ();
}
/* Removes the numeric range from MV and stores it in *LOW and
switch (type)
{
- case MV_NONE:
+ case MVT_NONE:
return false;
- case MV_1:
+ case MVT_1:
return idx < 1;
- case MV_2:
+ case MVT_2:
return idx < 2;
- case MV_3:
+ case MVT_3:
return true;
- case MV_RANGE:
+ case MVT_RANGE:
return idx > 0;
- case MV_RANGE_1:
+ case MVT_RANGE_1:
return true;
}
- abort ();
+ NOT_REACHED ();
}
/* Returns true if S contains only spaces between indexes
contains only spaces in the characters that will be
trimmed. */
bool
-mv_is_resizable (struct missing_values *mv, int width)
+mv_is_resizable (const struct missing_values *mv, int width)
{
- assert ((width == 0) == (mv->width == 0));
- if (width > MAX_SHORT_STRING && mv->type != MV_NONE)
+ if ( var_type_from_width (width) != var_type_from_width (mv->width) )
+ return false;
+
+ if (width > MAX_SHORT_STRING && mv->type != MVT_NONE)
return false;
- else if (width >= mv->width)
+
+ if (width >= mv->width)
return true;
- else
+ else
{
int i;
-
+
for (i = 0; i < 3; i++)
if (using_element (mv->type, i)
&& !can_resize_string (mv->values[i].s, mv->width, width))
mv_resize (struct missing_values *mv, int width)
{
assert (mv_is_resizable (mv, width));
- if (width > mv->width)
+ if (width > mv->width && mv->type != MVT_NONE)
{
int i;
mv->width = width;
}
-/* Returns true if V is system missing or a missing value in MV,
- false otherwise. */
-bool
-mv_is_value_missing (const struct missing_values *mv, const union value *v)
-{
- return (mv->width == 0
- ? mv_is_num_missing (mv, v->f)
- : mv_is_str_missing (mv, v->s));
-}
-
-/* Returns true if D is system missing or a missing value in MV,
- false otherwise.
- MV must be a set of numeric missing values. */
-bool
-mv_is_num_missing (const struct missing_values *mv, double d)
-{
- assert (mv->width == 0);
- return d == SYSMIS || mv_is_num_user_missing (mv, d);
-}
-
-/* Returns true if S[] is a missing value in MV, false otherwise.
- MV must be a set of string missing values.
- S[] must contain exactly as many characters as MV's width. */
-bool
-mv_is_str_missing (const struct missing_values *mv, const char s[])
-{
- return mv_is_str_user_missing (mv, s);
-}
-
-/* Returns true if V is a missing value in MV, false otherwise. */
-bool
-mv_is_value_user_missing (const struct missing_values *mv,
- const union value *v)
-{
- return (mv->width == 0
- ? mv_is_num_user_missing (mv, v->f)
- : mv_is_str_user_missing (mv, v->s));
-}
-
/* Returns true if D is a missing value in MV, false otherwise.
MV must be a set of numeric missing values. */
-bool
-mv_is_num_user_missing (const struct missing_values *mv, double d)
+static bool
+is_num_user_missing (const struct missing_values *mv, double d)
{
const union value *v = mv->values;
assert (mv->width == 0);
switch (mv->type)
{
- case MV_NONE:
+ case MVT_NONE:
return false;
- case MV_1:
+ case MVT_1:
return v[0].f == d;
- case MV_2:
+ case MVT_2:
return v[0].f == d || v[1].f == d;
- case MV_3:
+ case MVT_3:
return v[0].f == d || v[1].f == d || v[2].f == d;
- case MV_RANGE:
+ case MVT_RANGE:
return v[1].f <= d && d <= v[2].f;
- case MV_RANGE_1:
+ case MVT_RANGE_1:
return v[0].f == d || (v[1].f <= d && d <= v[2].f);
}
- abort ();
+ NOT_REACHED ();
}
/* Returns true if S[] is a missing value in MV, false otherwise.
MV must be a set of string missing values.
S[] must contain exactly as many characters as MV's width. */
-bool
-mv_is_str_user_missing (const struct missing_values *mv,
+static bool
+is_str_user_missing (const struct missing_values *mv,
const char s[])
{
const union value *v = mv->values;
assert (mv->width > 0);
switch (mv->type)
{
- case MV_NONE:
+ case MVT_NONE:
return false;
- case MV_1:
+ case MVT_1:
return !memcmp (v[0].s, s, mv->width);
- case MV_2:
+ case MVT_2:
return (!memcmp (v[0].s, s, mv->width)
|| !memcmp (v[1].s, s, mv->width));
- case MV_3:
+ case MVT_3:
return (!memcmp (v[0].s, s, mv->width)
|| !memcmp (v[1].s, s, mv->width)
|| !memcmp (v[2].s, s, mv->width));
- case MV_RANGE:
- case MV_RANGE_1:
- abort ();
+ case MVT_RANGE:
+ case MVT_RANGE_1:
+ NOT_REACHED ();
}
- abort ();
+ NOT_REACHED ();
+}
+
+/* Returns true if V is a missing value in the given CLASS in MV,
+ false otherwise. */
+bool
+mv_is_value_missing (const struct missing_values *mv, const union value *v,
+ enum mv_class class)
+{
+ return (mv->width == 0
+ ? mv_is_num_missing (mv, v->f, class)
+ : mv_is_str_missing (mv, v->s, class));
}
-/* Returns true if MV is a set of numeric missing values and V is
- the system missing value. */
+/* Returns true if D is a missing value in the given CLASS in MV,
+ false otherwise.
+ MV must be a set of numeric missing values. */
bool
-mv_is_value_system_missing (const struct missing_values *mv,
- const union value *v)
+mv_is_num_missing (const struct missing_values *mv, double d,
+ enum mv_class class)
{
- return mv->width == 0 ? v->f == SYSMIS : false;
+ assert (mv->width == 0);
+ return ((class & MV_SYSTEM && d == SYSMIS)
+ || (class & MV_USER && is_num_user_missing (mv, d)));
+}
+
+/* Returns true if S[] is a missing value in the given CLASS in
+ MV, false otherwise.
+ MV must be a set of string missing values.
+ S[] must contain exactly as many characters as MV's width. */
+bool
+mv_is_str_missing (const struct missing_values *mv, const char s[],
+ enum mv_class class)
+{
+ assert (mv->width > 0);
+ return class & MV_USER && is_str_user_missing (mv, s);
}
projects / pspp-builds.git / blobdiff