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., 59 Temple Place - Suite 330, Boston, MA
- 02111-1307, USA. */
+ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ 02110-1301, USA. */
#include <config.h>
#include "var.h"
#include "error.h"
#include <stdlib.h>
#include "alloc.h"
-#include "command.h"
-#include "do-ifP.h"
-#include "expr.h"
-#include "file-handle.h"
+#include "dictionary.h"
#include "hash.h"
+#include "lex-def.h"
#include "misc.h"
#include "str.h"
#include "value-labels.h"
-#include "vfm.h"
-#include "debug-print.h"
+#include "gettext.h"
+#define _(msgid) gettext (msgid)
+
+/* Returns an adjective describing the given variable TYPE,
+ suitable for use in phrases like "numeric variable". */
+const char *
+var_type_adj (enum var_type type)
+{
+ return type == NUMERIC ? _("numeric") : _("string");
+}
+
+/* Returns a noun describing a value of the given variable TYPE,
+ suitable for use in phrases like "a number". */
+const char *
+var_type_noun (enum var_type type)
+{
+ return type == NUMERIC ? _("number") : _("string");
+}
+
+/* Assign auxiliary data AUX to variable V, which must not
+ already have auxiliary data. Before V's auxiliary data is
+ cleared, AUX_DTOR(V) will be called. */
+void *
+var_attach_aux (struct variable *v,
+ void *aux, void (*aux_dtor) (struct variable *))
+{
+ assert (v->aux == NULL);
+ assert (aux != NULL);
+ v->aux = aux;
+ v->aux_dtor = aux_dtor;
+ return aux;
+}
+
+/* Remove auxiliary data, if any, from V, and returns it, without
+ calling any associated destructor. */
+void *
+var_detach_aux (struct variable *v)
+{
+ void *aux = v->aux;
+ assert (aux != NULL);
+ v->aux = NULL;
+ return aux;
+}
+
+/* Clears auxiliary data, if any, from V, and calls any
+ associated destructor. */
+void
+var_clear_aux (struct variable *v)
+{
+ assert (v != NULL);
+ if (v->aux != NULL)
+ {
+ if (v->aux_dtor != NULL)
+ v->aux_dtor (v);
+ v->aux = NULL;
+ }
+}
+
+/* This function is appropriate for use an auxiliary data
+ destructor (passed as AUX_DTOR to var_attach_aux()) for the
+ case where the auxiliary data should be passed to free(). */
+void
+var_dtor_free (struct variable *v)
+{
+ free (v->aux);
+}
/* Compares A and B, which both have the given WIDTH, and returns
a strcmp()-type result. */
if (width == 0)
return a->f < b->f ? -1 : a->f > b->f;
else
- return memcmp (a->s, b->s, width);
+ return memcmp (a->s, b->s, min(MAX_SHORT_STRING, width));
}
/* Create a hash of v */
if ( 0 == width )
id_hash = hsh_hash_double (v->f);
else
- id_hash = hsh_hash_bytes (v->s, width);
+ id_hash = hsh_hash_bytes (v->s, min(MAX_SHORT_STRING, width));
return id_hash;
}
-/* Discards all the current state in preparation for a data-input
- command like DATA LIST or GET. */
-void
-discard_variables (void)
+\f
+/* Returns true if NAME is an acceptable name for a variable,
+ false otherwise. If ISSUE_ERROR is true, issues an
+ explanatory error message on failure. */
+bool
+var_is_valid_name (const char *name, bool issue_error)
{
- dict_clear (default_dict);
- default_handle = inline_file;
-
- n_lag = 0;
+ size_t length, i;
- if (vfm_source != NULL)
+ assert (name != NULL);
+
+ length = strlen (name);
+ if (length < 1)
+ {
+ if (issue_error)
+ msg (SE, _("Variable name cannot be empty string."));
+ return false;
+ }
+ else if (length > LONG_NAME_LEN)
{
- free_case_source (vfm_source);
- vfm_source = NULL;
+ if (issue_error)
+ msg (SE, _("Variable name %s exceeds %d-character limit."),
+ name, (int) LONG_NAME_LEN);
+ return false;
}
- cancel_transformations ();
+ for (i = 0; i < length; i++)
+ if (!CHAR_IS_IDN (name[i]))
+ {
+ if (issue_error)
+ msg (SE, _("Character `%c' (in %s) may not appear in "
+ "a variable name."),
+ name[i], name);
+ return false;
+ }
+
+ if (!CHAR_IS_ID1 (name[0]))
+ {
+ if (issue_error)
+ msg (SE, _("Character `%c' (in %s), may not appear "
+ "as the first character in a variable name."),
+ name[0], name);
+ return false;
+ }
- ctl_stack = NULL;
+ if (lex_id_to_token (name, strlen (name)) != T_ID)
+ {
+ if (issue_error)
+ msg (SE, _("`%s' may not be used as a variable name because it "
+ "is a reserved word."), name);
+ return false;
+ }
- expr_free (process_if_expr);
- process_if_expr = NULL;
+ return true;
+}
- cancel_temporary ();
+/* A hsh_compare_func that orders variables A and B by their
+ names. */
+int
+compare_var_names (const void *a_, const void *b_, void *foo UNUSED)
+{
+ const struct variable *a = a_;
+ const struct variable *b = b_;
- pgm_state = STATE_INIT;
+ return strcasecmp (a->name, b->name);
}
-/* Return nonzero only if X is a user-missing value for numeric
- variable V. */
-inline int
-is_num_user_missing (double x, const struct variable *v)
+/* A hsh_hash_func that hashes variable V based on its name. */
+unsigned
+hash_var_name (const void *v_, void *foo UNUSED)
{
- switch (v->miss_type)
- {
- case MISSING_NONE:
- return 0;
- case MISSING_1:
- return x == v->missing[0].f;
- case MISSING_2:
- return x == v->missing[0].f || x == v->missing[1].f;
- case MISSING_3:
- return (x == v->missing[0].f || x == v->missing[1].f
- || x == v->missing[2].f);
- case MISSING_RANGE:
- return x >= v->missing[0].f && x <= v->missing[1].f;
- case MISSING_LOW:
- return x <= v->missing[0].f;
- case MISSING_HIGH:
- return x >= v->missing[0].f;
- case MISSING_RANGE_1:
- return ((x >= v->missing[0].f && x <= v->missing[1].f)
- || x == v->missing[2].f);
- case MISSING_LOW_1:
- return x <= v->missing[0].f || x == v->missing[1].f;
- case MISSING_HIGH_1:
- return x >= v->missing[0].f || x == v->missing[1].f;
- default:
- assert (0);
- }
- abort ();
+ const struct variable *v = v_;
+
+ return hsh_hash_case_string (v->name);
+}
+
+/* A hsh_compare_func that orders pointers to variables A and B
+ by their names. */
+int
+compare_var_ptr_names (const void *a_, const void *b_, void *foo UNUSED)
+{
+ struct variable *const *a = a_;
+ struct variable *const *b = b_;
+
+ return strcasecmp ((*a)->name, (*b)->name);
}
-/* Return nonzero only if string S is a user-missing variable for
- string variable V. */
-inline int
-is_str_user_missing (const unsigned char s[], const struct variable *v)
+/* A hsh_hash_func that hashes pointer to variable V based on its
+ name. */
+unsigned
+hash_var_ptr_name (const void *v_, void *foo UNUSED)
{
- switch (v->miss_type)
- {
- case MISSING_NONE:
- return 0;
- case MISSING_1:
- return !strncmp (s, v->missing[0].s, v->width);
- case MISSING_2:
- return (!strncmp (s, v->missing[0].s, v->width)
- || !strncmp (s, v->missing[1].s, v->width));
- case MISSING_3:
- return (!strncmp (s, v->missing[0].s, v->width)
- || !strncmp (s, v->missing[1].s, v->width)
- || !strncmp (s, v->missing[2].s, v->width));
- default:
- assert (0);
- }
- abort ();
+ struct variable *const *v = v_;
+
+ return hsh_hash_case_string ((*v)->name);
+}
+\f
+/* Sets V's short_name to SHORT_NAME, truncating it to
+ SHORT_NAME_LEN characters and converting it to uppercase in
+ the process. */
+void
+var_set_short_name (struct variable *v, const char *short_name)
+{
+ assert (v != NULL);
+ assert (short_name[0] == '\0' || var_is_valid_name (short_name, false));
+
+ str_copy_trunc (v->short_name, sizeof v->short_name, short_name);
+ str_uppercase (v->short_name);
}
-/* Return nonzero only if value VAL is system-missing for variable
- V. */
-int
-is_system_missing (const union value *val, const struct variable *v)
+/* Clears V's short name. */
+void
+var_clear_short_name (struct variable *v)
{
- return v->type == NUMERIC && val->f == SYSMIS;
+ assert (v != NULL);
+
+ v->short_name[0] = '\0';
}
-/* Return nonzero only if value VAL is system- or user-missing for
- variable V. */
-int
-is_missing (const union value *val, const struct variable *v)
+/* Sets V's short name to BASE, followed by a suffix of the form
+ _A, _B, _C, ..., _AA, _AB, etc. according to the value of
+ SUFFIX. Truncates BASE as necessary to fit. */
+void
+var_set_short_name_suffix (struct variable *v, const char *base, int suffix)
{
- switch (v->type)
+ char string[SHORT_NAME_LEN + 1];
+ char *start, *end;
+ int len, ofs;
+
+ assert (v != NULL);
+ assert (suffix >= 0);
+ assert (strlen (v->short_name) > 0);
+
+ /* Set base name. */
+ var_set_short_name (v, base);
+
+ /* Compose suffix_string. */
+ start = end = string + sizeof string - 1;
+ *end = '\0';
+ do
{
- case NUMERIC:
- if (val->f == SYSMIS)
- return 1;
- return is_num_user_missing (val->f, v);
- case ALPHA:
- return is_str_user_missing (val->s, v);
- default:
- assert (0);
+ *--start = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"[suffix % 26];
+ if (start <= string + 1)
+ msg (SE, _("Variable suffix too large."));
+ suffix /= 26;
}
- abort ();
+ while (suffix > 0);
+ *--start = '_';
+
+ /* Append suffix_string to V's short name. */
+ len = end - start;
+ if (len + strlen (v->short_name) > SHORT_NAME_LEN)
+ ofs = SHORT_NAME_LEN - len;
+ else
+ ofs = strlen (v->short_name);
+ strcpy (v->short_name + ofs, start);
}
-/* Return nonzero only if value VAL is user-missing for variable V. */
-int
-is_user_missing (const union value *val, const struct variable *v)
+
+/* Returns the dictionary class corresponding to a variable named
+ NAME. */
+enum dict_class
+dict_class_from_id (const char *name)
{
- switch (v->type)
+ assert (name != NULL);
+
+ switch (name[0])
{
- case NUMERIC:
- return is_num_user_missing (val->f, v);
- case ALPHA:
- return is_str_user_missing (val->s, v);
default:
- assert (0);
+ return DC_ORDINARY;
+ case '$':
+ return DC_SYSTEM;
+ case '#':
+ return DC_SCRATCH;
}
- abort ();
-}
-\f
-/* A hsh_compare_func that orders variables A and B by their
- names. */
-int
-compare_variables (const void *a_, const void *b_, void *foo UNUSED)
-{
- const struct variable *a = a_;
- const struct variable *b = b_;
-
- return strcmp (a->name, b->name);
}
-/* A hsh_hash_func that hashes variable V based on its name. */
-unsigned
-hash_variable (const void *v_, void *foo UNUSED)
+/* Returns the name of dictionary class DICT_CLASS. */
+const char *
+dict_class_to_name (enum dict_class dict_class)
{
- const struct variable *v = v_;
-
- return hsh_hash_string (v->name);
+ switch (dict_class)
+ {
+ case DC_ORDINARY:
+ return _("ordinary");
+ case DC_SYSTEM:
+ return _("system");
+ case DC_SCRATCH:
+ return _("scratch");
+ default:
+ assert (0);
+ abort ();
+ }
}
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