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
47 * $Log: fmltoken.c,v $
48 * Revision 1.7 1995/05/16 09:39:35 adam
51 * Revision 1.6 1995/02/23 08:32:07 adam
54 * Revision 1.4 1995/02/10 18:15:53 adam
55 * FML function 'strcmp' implemented. This function can be used to
56 * test for existence of MARC fields.
58 * Revision 1.3 1995/02/10 15:50:57 adam
59 * MARC interface implemented. Minor bugs fixed. fmltest can
60 * be used to format single MARC records. New function '\list'
63 * Revision 1.2 1995/02/07 16:09:24 adam
64 * The \ character is no longer INCLUDED when terminating a token.
65 * Major changes in tokenization routines. Bug fixes in expressions
66 * with lists (fml_sub0).
68 * Revision 1.1.1.1 1995/02/06 13:48:10 adam
69 * First version of the FML interpreter. It's slow and memory isn't
70 * freed properly. In particular, the FML nodes aren't released yet.
81 static char lex_buf[FML_MAX_TOKEN];
83 static void lexer (Fml fml);
85 struct fml_node *fml_group (Fml fml);
87 struct fml_node *fml_tokenize (Fml fml)
91 look_char = (*fml->read_func)();
98 if (look_char != fml->eof_mark)
100 fprintf (stderr, "Ill formed parantheses");
106 void fml_pr_list (struct fml_node *p)
115 fml_atom_str (p->p[0], buf);
121 fml_pr_list (p->p[0]);
128 struct fml_node *fml_group (Fml fml)
130 struct fml_node *ptr0 = NULL, *ptr1, *ptr2;
137 if (look_type == 'a')
139 ptr2 = fml_node_alloc (fml);
144 ptr2->p[0] = fml_atom_alloc (fml, lex_buf);
147 else if (look_type == '{')
149 struct fml_node *sptr = fml_group (fml);
152 ptr2 = fml_node_alloc (fml);
162 ptr2 = fml_node_alloc (fml);
178 static void lexer (Fml fml)
183 if (look_char == fml->eof_mark)
188 else if (look_char == fml->comment_char)
191 look_char = (*fml->read_func)();
192 while (look_char != '\n' && look_char != fml->eof_mark);
196 if (!strchr (fml->white_chars, look_char))
198 look_char = (*fml->read_func)();
201 if (look_char == '{')
204 look_char = (*fml->read_func)();
206 else if (look_char == '}')
209 look_char = (*fml->read_func)();
211 else if (look_char == '\'')
214 look_char = (*fml->read_func)();
215 while (look_char != fml->eof_mark && look_char != '\'')
217 lex_buf[off++] = look_char;
218 if (look_char == '\\')
220 look_char = (*fml->read_func)();
224 lex_buf[off-1] = '\n';
227 lex_buf[off-1] = '\n';
230 lex_buf[off-1] = '\'';
233 lex_buf[off-1] = look_char;
236 look_char = (*fml->read_func)();
240 if (look_char == '\'')
241 look_char = (*fml->read_func)();
248 lex_buf[off++] = look_char;
249 look_char = (*fml->read_func)();
250 } while (look_char != fml->eof_mark
251 && !strchr (fml->white_chars, look_char)
252 && look_char != '{' && look_char != '}');
259 if (look_type == 'a')
260 printf ("[%s]", lex_buf);
262 printf ("[%c]", look_type);