3 * $Id: field-parse.c,v 1.3 2004/04/03 03:32:05 mdw Exp $
5 * Parse field descriptions
7 * (c) 2004 Straylight/Edgeware
10 /*----- Licensing notice --------------------------------------------------*
12 * This file is part of Catacomb.
14 * Catacomb is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU Library General Public License as
16 * published by the Free Software Foundation; either version 2 of the
17 * License, or (at your option) any later version.
19 * Catacomb is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU Library General Public License for more details.
24 * You should have received a copy of the GNU Library General Public
25 * License along with Catacomb; if not, write to the Free
26 * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
30 /*----- Revision history --------------------------------------------------*
32 * $Log: field-parse.c,v $
33 * Revision 1.3 2004/04/03 03:32:05 mdw
34 * General robustification.
36 * Revision 1.2 2004/04/01 21:28:41 mdw
37 * Normal basis support (translates to poly basis internally). Rewrite
38 * EC and prime group table generators in awk, so that they can reuse data
39 * for repeated constants.
41 * Revision 1.1 2004/03/27 17:54:11 mdw
42 * Standard curves and curve checking.
46 /*----- Header files ------------------------------------------------------*/
50 /*----- Main code ---------------------------------------------------------*/
52 /* --- @field_parse@ --- *
54 * Arguments: @qd_parse *qd@ = parser context
56 * Returns: Field pointer if OK, or null.
58 * Use: Parses a field description, which has the form
60 * * `prime', `niceprime' or `binpoly'
65 field
*field_parse(qd_parse
*qd
)
68 mp
*m
= MP_NEW
, *b
= MP_NEW
;
70 switch (qd_enum(qd
, "prime,niceprime,binpoly,binnorm")) {
73 if ((m
= qd_getmp(qd
)) == 0) goto done
;
78 if ((m
= qd_getmp(qd
)) == 0) goto done
;
79 f
= field_niceprime(m
);
83 if ((m
= qd_getmp(qd
)) == 0) goto done
;
88 if ((m
= qd_getmp(qd
)) == 0) goto done
;
90 if ((b
= qd_getmp(qd
)) == 0) goto done
;
91 f
= field_binnorm(m
, b
);
96 if (!f
) qd
->e
= "bad field parameters";
103 /*----- That's all, folks -------------------------------------------------*/