1 /* PSPP - a program for statistical analysis. 2 Copyright (C) 2010, 2011 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 18 #ifndef AGGREGATE_H 19 #define AGGREGATE_H 20 21 #include <stddef.h> 22 23 #include "data/format.h" 24 #include "data/val-type.h" 25 26 enum agr_src_vars 27 { 28 AGR_SV_NO, 29 AGR_SV_YES, 30 AGR_SV_OPT 31 }; 32 33 /* Aggregation functions. */ 34 enum 35 { 36 SUM, MEAN, MEDIAN, SD, MAX, MIN, PGT, PLT, PIN, POUT, FGT, FLT, FIN, 37 FOUT, N, NU, NMISS, NUMISS, FIRST, LAST, 38 39 FUNC = 0x1f, /* Function mask. */ 40 FSTRING = 1<<5, /* String function bit. */ 41 }; 42 43 /* Attributes of an aggregation function. */ 44 struct agr_func 45 { 46 const char *name; /* Aggregation function name. */ 47 const char *description; /* Translatable string describing the function. */ 48 enum agr_src_vars src_vars; /* Whether source variables are a parameter of the function */ 49 size_t n_args; /* Number of arguments (not including src vars). */ 50 enum val_type alpha_type; /* When given ALPHA arguments, output type. */ 51 struct fmt_spec format; /* Format spec if alpha_type != ALPHA. */ 52 }; 53 54 extern const struct agr_func agr_func_tab[]; 55 56 57 #endif 58