02111-1307, USA. */
#include <config.h>
-#include <assert.h>
+#include "error.h"
#include <stdlib.h>
#include "alloc.h"
+#include "case.h"
#include "command.h"
#include "error.h"
#include "expr.h"
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->test, c, case_num, NULL) == 1.0)
{
- expr_evaluate (compute->rvalue, c, &c->data[compute->fv]);
+ expr_evaluate (compute->rvalue, c, case_num,
+ case_data_rw (c, compute->fv));
}
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 (compute->test, c, case_num, NULL) == 1.0)
{
/* Index into the vector. */
union value index;
/* Rounded index value. */
int rindx;
- expr_evaluate (compute->element, c, &index);
+ expr_evaluate (compute->element, c, case_num, &index);
rindx = floor (index.f + EPSILON);
if (index.f == SYSMIS || rindx < 1 || rindx > compute->vector->cnt)
{
index.f, compute->vector->name);
return -1;
}
- expr_evaluate (compute->rvalue, c,
- &c->data[compute->vector->var[rindx - 1]->fv]);
+ expr_evaluate (compute->rvalue, c, case_num,
+ case_data_rw (c, compute->vector->var[rindx - 1]->fv));
}
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)
+ || expr_evaluate (compute->test, c, case_num, 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 (compute->rvalue, c, case_num, &v);
+ st_bare_pad_len_copy (case_data_rw (c, compute->fv)->s,
+ &v.c[1], compute->width, v.c[0]);
}
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 (compute->test, c, case_num, NULL) == 1.0)
{
/* Temporary storage for string expression return value. */
union value v;
/* Variable reference by indexed vector. */
struct variable *vr;
- expr_evaluate (compute->element, c, &index);
+ expr_evaluate (compute->element, c, case_num, &index);
rindx = floor (index.f + EPSILON);
if (index.f == SYSMIS || rindx < 1 || rindx > compute->vector->cnt)
{
return -1;
}
- expr_evaluate (compute->rvalue, c, &v);
+ expr_evaluate (compute->rvalue, c, case_num, &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]);
+ st_bare_pad_len_copy (case_data_rw (c, vr->fv)->s,
+ &v.c[1], vr->width, v.c[0]);
}
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 (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 (type == ALPHA ? EXPR_STRING : EXPR_NUMERIC);
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 "". */
struct expression *element; /* Destination vector element, or NULL. */
};
+/* Parses the target variable or vector elector 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 (EXPR_NUMERIC);
if (lvalue->element == NULL)
goto lossage;
if (!lex_force_match (')'))
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)
{
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)
{
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