1 /* PSPP - computes sample statistics.
2 Copyright (C) 1997-9, 2000 Free Software Foundation, Inc.
3 Written by Ben Pfaff <blp@gnu.org>.
5 This program is free software; you can redistribute it and/or
6 modify it under the terms of the GNU General Public License as
7 published by the Free Software Foundation; either version 2 of the
8 License, or (at your option) any later version.
10 This program is distributed in the hope that it will be useful, but
11 WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, write to the Free Software
17 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
31 expr_evaluate (struct expression *e, const struct ccase *c, int case_idx,
34 union operation_data *op = e->ops;
36 double *ns = e->number_stack;
37 struct fixed_string *ss = e->string_stack;
39 assert ((c != NULL) == (e->dict != NULL));
40 pool_clear (e->eval_pool);
44 assert (op < e->ops + e->op_cnt);
45 switch (op++->operation)
54 const struct fixed_string *s = &op++->string;
55 *ss++ = copy_string (e, s->string, s->length);
59 case OP_return_number:
60 *(double *) result = finite (ns[-1]) ? ns[-1] : SYSMIS;
63 case OP_return_string:
64 *(struct fixed_string *) result = ss[-1];
67 #include "evaluate.inc"
76 expr_evaluate_num (struct expression *e, const struct ccase *c, int case_idx)
80 assert (e->type == OP_number || e->type == OP_boolean);
81 expr_evaluate (e, c, case_idx, &d);
86 expr_evaluate_str (struct expression *e, const struct ccase *c, int case_idx,
87 char *dst, size_t dst_size)
89 struct fixed_string s;
91 assert (e->type == OP_string);
92 assert ((dst == NULL) == (dst_size == 0));
93 expr_evaluate (e, c, case_idx, &s);
94 buf_copy_rpad (dst, dst_size, s.string, s.length);
101 cmd_debug_evaluate (void)
103 bool optimize = true;
104 int retval = CMD_FAILURE;
105 bool dump_postfix = false;
106 struct dictionary *d = NULL;
107 struct ccase *c = NULL;
109 struct expression *expr;
113 if (lex_match_id ("NOOPTIMIZE"))
115 else if (lex_match_id ("POSTFIX"))
117 else if (lex_match ('('))
119 char name[LONG_NAME_LEN + 1];
121 size_t old_value_cnt;
124 if (!lex_force_id ())
126 strcpy (name, tokid);
129 if (!lex_force_match ('='))
132 if (lex_is_number ())
135 fprintf (stderr, "(%s = %.2f)", name, tokval);
137 else if (token == T_STRING)
139 width = ds_length (&tokstr);
140 fprintf (stderr, "(%s = \"%.2s\")", name, ds_c_str (&tokstr));
144 lex_error (_("expecting number or string"));
151 old_value_cnt = dict_get_next_value_idx (d);
152 v = dict_create_var (d, name, width);
155 msg (SE, _("Duplicate variable name %s."), name);
161 c = xmalloc (sizeof *c);
164 case_resize (c, old_value_cnt, dict_get_next_value_idx (d));
166 if (lex_is_number ())
167 case_data_rw (c, v->fv)->f = tokval;
169 memcpy (case_data_rw (c, v->fv)->s, ds_data (&tokstr),
173 if (!lex_force_match (')'))
181 lex_force_match ('/');
185 fprintf (stderr, "; ");
186 fprintf (stderr, "%s => ", lex_rest_of_line (NULL));
189 expr = expr_parse_any (d, optimize);
190 if (!expr || lex_end_of_command () != CMD_SUCCESS)
194 fprintf (stderr, "error\n");
199 expr_debug_print_postfix (expr);
205 double d = expr_evaluate_num (expr, c, 0);
207 fprintf (stderr, "sysmis\n");
209 fprintf (stderr, "%.2f\n", d);
215 double b = expr_evaluate_num (expr, c, 0);
216 fprintf (stderr, "%s\n",
217 b == SYSMIS ? "sysmis" : b == 0.0 ? "false" : "true");
223 struct fixed_string s;
224 expr_evaluate (expr, c, 0, &s);
227 fwrite (s.string, s.length, 1, stderr);
228 fputs ("\"\n", stderr);
237 retval = CMD_SUCCESS;
250 expr_debug_print_postfix (const struct expression *e)
254 for (i = 0; i < e->op_cnt; i++)
256 union operation_data *op = &e->ops[i];
259 switch (e->op_types[i])
262 if (op->operation == OP_return_number)
263 fprintf (stderr, "return_number");
264 else if (op->operation == OP_return_string)
265 fprintf (stderr, "return_string");
266 else if (is_function (op->operation))
267 fprintf (stderr, "%s", operations[op->operation].prototype);
268 else if (is_composite (op->operation))
269 fprintf (stderr, "%s", operations[op->operation].name);
271 fprintf (stderr, "%s:", operations[op->operation].name);
274 if (op->number != SYSMIS)
275 fprintf (stderr, "n<%g>", op->number);
277 fprintf (stderr, "n<SYSMIS>");
280 fprintf (stderr, "s<%.*s>",
281 (int) op->string.length,
282 op->string.string != NULL ? op->string.string : "");
285 fprintf (stderr, "f<%s%d.%d>",
286 formats[op->format->type].name,
287 op->format->w, op->format->d);
290 fprintf (stderr, "v<%s>", op->variable->name);
293 fprintf (stderr, "vec<%s>", op->vector->name);
296 fprintf (stderr, "i<%d>", op->integer);
302 fprintf (stderr, "\n");