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 <assert.h>
+#include "error.h"
#include <stdlib.h>
#include "alloc.h"
-#include "approx.h"
+#include "case.h"
#include "command.h"
+#include "dictionary.h"
#include "error.h"
-#include "expr.h"
+#include "expressions/public.h"
#include "lexer.h"
+#include "misc.h"
#include "str.h"
#include "var.h"
+#include "gettext.h"
+#define _(msgid) gettext (msgid)
+
struct compute_trns;
struct lvalue;
struct lvalue *lvalue = NULL;
struct compute_trns *compute = NULL;
- lex_match_id ("COMPUTE");
-
lvalue = lvalue_parse ();
if (lvalue == NULL)
goto fail;
\f
/* Transformation functions. */
+/* Handle COMPUTE or IF with numeric target variable. */
static int
-compute_num (struct trns_header *compute_, struct ccase *c)
+compute_num (struct trns_header *compute_, struct ccase *c,
+ int case_num)
{
struct compute_trns *compute = (struct compute_trns *) compute_;
if (compute->test == NULL
- || expr_evaluate (compute->test, c, NULL) == 1.0)
- {
- expr_evaluate (compute->rvalue, c, &c->data[compute->fv]);
- }
+ || expr_evaluate_num (compute->test, c, case_num) == 1.0)
+ case_data_rw (c, compute->fv)->f = expr_evaluate_num (compute->rvalue, c,
+ case_num);
return -1;
}
+/* Handle COMPUTE or IF with numeric vector element target
+ variable. */
static int
-compute_num_vec (struct trns_header *compute_, struct ccase *c)
+compute_num_vec (struct trns_header *compute_, struct ccase *c,
+ int case_num)
{
struct compute_trns *compute = (struct compute_trns *) compute_;
if (compute->test == NULL
- || expr_evaluate (compute->test, c, NULL) == 1.0)
+ || expr_evaluate_num (compute->test, c, case_num) == 1.0)
{
- /* Index into the vector. */
- union value index;
-
- /* Rounded index value. */
- int rindx;
+ double index; /* Index into the vector. */
+ int rindx; /* Rounded index value. */
- expr_evaluate (compute->element, c, &index);
- rindx = floor (index.f + EPSILON);
- if (index.f == SYSMIS || rindx < 1 || rindx > compute->vector->cnt)
+ index = expr_evaluate_num (compute->element, c, case_num);
+ rindx = floor (index + EPSILON);
+ if (index == SYSMIS || rindx < 1 || rindx > compute->vector->cnt)
{
- if (index.f == SYSMIS)
+ if (index == SYSMIS)
msg (SW, _("When executing COMPUTE: SYSMIS is not a valid value as "
"an index into vector %s."), compute->vector->name);
else
msg (SW, _("When executing COMPUTE: %g is not a valid value as "
"an index into vector %s."),
- index.f, compute->vector->name);
+ index, compute->vector->name);
return -1;
}
- expr_evaluate (compute->rvalue, c,
- &c->data[compute->vector->var[rindx - 1]->fv]);
+ case_data_rw (c, compute->vector->var[rindx - 1]->fv)->f
+ = expr_evaluate_num (compute->rvalue, c, case_num);
}
return -1;
}
+/* Handle COMPUTE or IF with string target variable. */
static int
-compute_str (struct trns_header *compute_, struct ccase *c)
+compute_str (struct trns_header *compute_, struct ccase *c,
+ int case_num)
{
struct compute_trns *compute = (struct compute_trns *) compute_;
if (compute->test == NULL
- || expr_evaluate (compute->test, c, NULL) == 1.0)
- {
- /* Temporary storage for string expression return value. */
- union value v;
-
- expr_evaluate (compute->rvalue, c, &v);
- st_bare_pad_len_copy (c->data[compute->fv].s, &v.c[1], compute->width,
- v.c[0]);
- }
+ || expr_evaluate_num (compute->test, c, case_num) == 1.0)
+ expr_evaluate_str (compute->rvalue, c, case_num,
+ case_data_rw (c, compute->fv)->s, compute->width);
return -1;
}
+/* Handle COMPUTE or IF with string vector element target
+ variable. */
static int
-compute_str_vec (struct trns_header *compute_, struct ccase *c)
+compute_str_vec (struct trns_header *compute_, struct ccase *c,
+ int case_num)
{
struct compute_trns *compute = (struct compute_trns *) compute_;
if (compute->test == NULL
- || expr_evaluate (compute->test, c, NULL) == 1.0)
+ || expr_evaluate_num (compute->test, c, case_num) == 1.0)
{
- /* Temporary storage for string expression return value. */
- union value v;
-
- /* Index into the vector. */
- union value index;
-
- /* Rounded index value. */
- int rindx;
-
- /* Variable reference by indexed vector. */
- struct variable *vr;
+ double index; /* Index into the vector. */
+ int rindx; /* Rounded index value. */
+ struct variable *vr; /* Variable reference by indexed vector. */
- expr_evaluate (compute->element, c, &index);
- rindx = floor (index.f + EPSILON);
- if (index.f == SYSMIS || rindx < 1 || rindx > compute->vector->cnt)
+ index = expr_evaluate_num (compute->element, c, case_num);
+ rindx = floor (index + EPSILON);
+ if (index == SYSMIS)
{
- if (index.f == SYSMIS)
- msg (SW, _("When executing COMPUTE: SYSMIS is not a valid "
- "value as an index into vector %s."),
- compute->vector->name);
- else
- msg (SW, _("When executing COMPUTE: %g is not a valid value as "
- "an index into vector %s."),
- index.f, compute->vector->name);
+ msg (SW, _("When executing COMPUTE: SYSMIS is not a valid "
+ "value as an index into vector %s."),
+ compute->vector->name);
+ return -1;
+ }
+ else if (rindx < 1 || rindx > compute->vector->cnt)
+ {
+ msg (SW, _("When executing COMPUTE: %g is not a valid value as "
+ "an index into vector %s."),
+ index, compute->vector->name);
return -1;
}
- expr_evaluate (compute->rvalue, c, &v);
vr = compute->vector->var[rindx - 1];
- st_bare_pad_len_copy (c->data[vr->fv].s, &v.c[1], vr->width, v.c[0]);
+ expr_evaluate_str (compute->rvalue, c, case_num,
+ case_data_rw (c, vr->fv)->s, vr->width);
}
return -1;
struct compute_trns *compute = NULL;
struct lvalue *lvalue = NULL;
- lex_match_id ("IF");
compute = compute_trns_create ();
/* Test expression. */
- compute->test = expr_parse (PXP_BOOLEAN);
+ compute->test = expr_parse (default_dict, EXPR_BOOLEAN);
if (compute->test == NULL)
goto fail;
assert (type == NUMERIC || type == ALPHA);
- compute->rvalue = expr_parse (type == ALPHA ? PXP_STRING : PXP_NUMERIC);
+ compute->rvalue = expr_parse (default_dict,
+ type == ALPHA ? EXPR_STRING : EXPR_NUMBER);
if (compute->rvalue == NULL)
return 0;
expr_free (compute->rvalue);
}
\f
+/* COMPUTE or IF target variable or vector element. */
struct lvalue
{
- char var_name[9]; /* Destination variable name, or "". */
+ char var_name[LONG_NAME_LEN + 1]; /* Destination variable name, or "". */
const struct vector *vector; /* Destination vector, if any, or NULL. */
struct expression *element; /* Destination vector element, or NULL. */
};
+/* Parses the target variable or vector element into a new
+ `struct lvalue', which is returned. */
static struct lvalue *
lvalue_parse (void)
{
lex_get ();
if (!lex_force_match ('('))
goto lossage;
- lvalue->element = expr_parse (PXP_NUMERIC);
+ lvalue->element = expr_parse (default_dict, EXPR_NUMBER);
if (lvalue->element == NULL)
goto lossage;
if (!lex_force_match (')'))
else
{
/* Variable name. */
- strncpy (lvalue->var_name, tokid, 8);
- lvalue->var_name[8] = '\0';
+ str_copy_trunc (lvalue->var_name, sizeof lvalue->var_name, tokid);
lex_get ();
}
return lvalue;
return NULL;
}
+/* Returns the type (NUMERIC or ALPHA) of the target variable or
+ vector in LVALUE. */
static int
lvalue_get_type (const struct lvalue *lvalue)
{
if (lvalue->vector == NULL)
{
- struct variable *var
- = dict_lookup_var (default_dict, lvalue->var_name);
+ struct variable *var = dict_lookup_var (default_dict, lvalue->var_name);
if (var == NULL)
return NUMERIC;
else
return lvalue->vector->var[0]->type;
}
+/* Returns nonzero if LVALUE has a vector as its target. */
static int
lvalue_is_vector (const struct lvalue *lvalue)
{
return lvalue->vector != NULL;
}
+/* Finalizes making LVALUE the target of COMPUTE, by creating the
+ target variable if necessary and setting fields in COMPUTE. */
static void
lvalue_finalize (struct lvalue *lvalue,
struct compute_trns *compute)
{
compute->variable = dict_lookup_var (default_dict, lvalue->var_name);
if (compute->variable == NULL)
- compute->variable = dict_create_var_assert (default_dict,
- lvalue->var_name, 0);
+ compute->variable = dict_create_var_assert (default_dict,
+ lvalue->var_name, 0);
+
compute->fv = compute->variable->fv;
compute->width = compute->variable->width;
lvalue_destroy (lvalue);
}
+/* Destroys LVALUE. */
static void
lvalue_destroy (struct lvalue *lvalue)
{
+ if ( ! lvalue )
+ return ;
+
expr_free (lvalue->element);
free (lvalue);
}
-\f
-/* EVALUATE. */
-
-int
-cmd_evaluate (void)
-{
- struct expression *expr;
-
- lex_match_id ("EVALUATE");
- expr = expr_parse (PXP_DUMP);
- if (!expr)
- return CMD_FAILURE;
-
- expr_free (expr);
- if (token != '.')
- {
- msg (SE, _("Extra characters after expression."));
- return CMD_FAILURE;
- }
-
- return CMD_SUCCESS;
-}
projects / pspp-builds.git / blobdiff