src/language/expressions/public.h

   1 /* PSPP - a program for statistical analysis.
   2    Copyright (C) 1997-9, 2000 Free Software Foundation, Inc.
   3
   4    This program is free software: you can redistribute it and/or modify
   5    it under the terms of the GNU General Public License as published by
   6    the Free Software Foundation, either version 3 of the License, or
   7    (at your option) any later version.
   8
   9    This program is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12    GNU General Public License for more details.
  13
  14    You should have received a copy of the GNU General Public License
  15    along with this program.  If not, see <http://www.gnu.org/licenses/>. */
  16
  17 #if !expr_h
  18 #define expr_h 1
  19
  20 #include <stddef.h>
  21
  22 #include "data/val-type.h"
  23
  24 struct ccase;
  25 struct dataset;
  26 struct dictionary;
  27 struct expression;
  28 struct lexer;
  29 struct pool;
  30 union value;
  31
  32 struct expression *expr_parse (struct lexer *lexer, struct pool *,
  33                                struct dataset *, enum val_type);
  34 struct expression *expr_parse_bool (struct lexer *lexer, struct pool *,
  35                                     struct dataset *);
  36 struct expression *expr_parse_new_variable (struct lexer *lexer, struct pool *,
  37                                             struct dataset *,
  38                                             const char *new_var_name);
  39 void expr_free (struct expression *);
  40
  41 struct dataset;
  42 double expr_evaluate_num (struct expression *, const struct ccase *,
  43                           int case_idx);
  44 void expr_evaluate_str (struct expression *, const struct ccase *,
  45                         int case_idx, char *dst, size_t dst_size);
  46
  47 const struct operation *expr_get_function (size_t idx);
  48 size_t expr_get_function_cnt (void);
  49 const char *expr_operation_get_name (const struct operation *);
  50 const char *expr_operation_get_prototype (const struct operation *);
  51 int expr_operation_get_arg_cnt (const struct operation *);
  52
  53 #endif /* expr.h */