44 lines
1.4 KiB
C
44 lines
1.4 KiB
C
/* Functions for mfcalc. -*- C -*-
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Copyright (C) 1988-1993, 1995, 1998-2015, 2018-2021 Free Software
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Foundation, Inc.
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This file is part of Bison, the GNU Compiler Compiler.
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>. */
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/* Function type. */
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typedef double (func_t) (double);
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/* Data type for links in the chain of symbols. */
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struct symrec
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{
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char *name; /* name of symbol */
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int type; /* type of symbol: either VAR or FUN */
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union
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{
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double var; /* value of a VAR */
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func_t *fun; /* value of a FUN */
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} value;
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struct symrec *next; /* link field */
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};
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typedef struct symrec symrec;
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/* The symbol table: a chain of 'struct symrec'. */
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extern symrec *sym_table;
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symrec *putsym (char const *name, int sym_type);
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symrec *getsym (char const *name);
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