2 * Copyright (c) 1995, the EUROPAGATE consortium (see below).
4 * The EUROPAGATE consortium members are:
6 * University College Dublin
7 * Danmarks Teknologiske Videnscenter
8 * An Chomhairle Leabharlanna
9 * Consejo Superior de Investigaciones Cientificas
11 * Permission to use, copy, modify, distribute, and sell this software and
12 * its documentation, in whole or in part, for any purpose, is hereby granted,
15 * 1. This copyright and permission notice appear in all copies of the
16 * software and its documentation. Notices of copyright or attribution
17 * which appear at the beginning of any file must remain unchanged.
19 * 2. The names of EUROPAGATE or the project partners may not be used to
20 * endorse or promote products derived from this software without specific
21 * prior written permission.
23 * 3. Users of this software (implementors and gateway operators) agree to
24 * inform the EUROPAGATE consortium of their use of the software. This
25 * information will be used to evaluate the EUROPAGATE project and the
26 * software, and to plan further developments. The consortium may use
27 * the information in later publications.
29 * 4. Users of this software agree to make their best efforts, when
30 * documenting their use of the software, to acknowledge the EUROPAGATE
31 * consortium, and the role played by the software in their work.
33 * THIS SOFTWARE IS PROVIDED "AS IS" AND WITHOUT WARRANTY OF ANY KIND,
34 * EXPRESS, IMPLIED, OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY
35 * WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
36 * IN NO EVENT SHALL THE EUROPAGATE CONSORTIUM OR ITS MEMBERS BE LIABLE
37 * FOR ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF
38 * ANY KIND, OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA
39 * OR PROFITS, WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND
40 * ON ANY THEORY OF LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE
41 * USE OR PERFORMANCE OF THIS SOFTWARE.
45 * FML interpreter. Europagate, 1995
48 * Revision 1.4 1995/05/16 09:39:32 adam
51 * Revision 1.3 1995/02/23 08:32:04 adam
54 * Revision 1.1 1995/02/09 14:33:36 adam
55 * Split source fml.c and define relevant build-in functions in separate
56 * files. New operators mult, div, not, llen implemented.
66 static struct fml_node *fml_exec_plus (Fml fml, struct fml_node *l,
69 int left_val, right_val;
71 fml_lr_values (fml, l, &left_val, r, &right_val);
72 return fml_mk_node_val (fml, left_val + right_val);
75 static struct fml_node *fml_exec_minus (Fml fml, struct fml_node *l,
78 int left_val, right_val;
80 fml_lr_values (fml, l, &left_val, r, &right_val);
81 return fml_mk_node_val (fml, left_val - right_val);
84 static struct fml_node *fml_exec_mult (Fml fml, struct fml_node *l,
87 int left_val, right_val;
89 fml_lr_values (fml, l, &left_val, r, &right_val);
90 return fml_mk_node_val (fml, left_val * right_val);
93 static struct fml_node *fml_exec_div (Fml fml, struct fml_node *l,
96 int left_val, right_val;
98 fml_lr_values (fml, l, &left_val, r, &right_val);
99 return fml_mk_node_val (fml, left_val / right_val);
102 static struct fml_node *fml_exec_incr (Fml fml, struct fml_node **lp,
105 struct fml_node *fn = NULL;
106 struct fml_sym_info *info;
107 fml_cmd_lex (lp, tp);
110 info = fml_sym_lookup (fml->sym_tab, tp->tokenbuf);
112 if (info->kind == FML_VAR && info->body && info->body->is_atom)
117 val = fml_atom_val (info->body->p[0]);
118 fml_node_delete (fml, info->body);
119 sprintf (arg, "%d", val+1);
120 info->body = fn = fml_node_alloc (fml);
122 fn->p[0] = fml_atom_alloc (fml, arg);
125 fml_cmd_lex (lp, tp);
129 static struct fml_node *fml_exec_decr (Fml fml, struct fml_node **lp,
132 struct fml_node *fn = NULL;
133 struct fml_sym_info *info;
134 fml_cmd_lex (lp, tp);
137 info = fml_sym_lookup (fml->sym_tab, tp->tokenbuf);
139 if (info->kind == FML_VAR && info->body && info->body->is_atom)
144 val = fml_atom_val (info->body->p[0]);
145 sprintf (arg, "%d", val-1);
146 info->body = fn = fml_node_alloc (fml);
148 fn->p[0] = fml_atom_alloc (fml, arg);
151 fml_cmd_lex (lp, tp);
155 void fml_arit_init (Fml fml)
157 struct fml_sym_info *sym_info;
159 sym_info = fml_sym_add (fml->sym_tab, "plus");
160 sym_info->kind = FML_CBINARY;
161 sym_info->binary = fml_exec_plus;
162 sym_info = fml_sym_add (fml->sym_tab, "minus");
163 sym_info->kind = FML_CBINARY;
164 sym_info->binary = fml_exec_minus;
166 sym_info = fml_sym_add (fml->sym_tab, "mult");
167 sym_info->kind = FML_CBINARY;
168 sym_info->binary = fml_exec_mult;
169 sym_info = fml_sym_add (fml->sym_tab, "div");
170 sym_info->kind = FML_CBINARY;
171 sym_info->binary = fml_exec_div;
173 sym_info = fml_sym_add (fml->sym_tab, "incr");
174 sym_info->kind = FML_CPREFIX;
175 sym_info->prefix = fml_exec_incr;
176 sym_info = fml_sym_add (fml->sym_tab, "decr");
177 sym_info->kind = FML_CPREFIX;
178 sym_info->prefix = fml_exec_decr;