3 * $Id: mptypes.c,v 1.5 2004/04/08 01:36:15 mdw Exp $
5 * Generate `mptypes.h' header file for current architecture
7 * (c) 1999 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 /*----- Header files ------------------------------------------------------*/
35 #if __STDC_VERSION__ >= 199900l
39 /*----- Data types --------------------------------------------------------*/
41 /* --- Hack for GCC --- *
43 * WG14 in their infinite wisdom decided not to use the GCC constant name.
46 #if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 91)
47 # define EXT __extension__
52 #if defined(ULONG_LONG_MAX) && !defined(ULLONG_MAX)
53 # define ULLONG_MAX ULONG_LONG_MAX
56 /* --- Choose the largest integer type --- */
58 #if defined(UINTMAX_MAX)
59 typedef uintmax_t umax;
60 # define P_UMAX PRIuMAX
61 #elif defined(ULLONG_MAX)
62 __extension__ typedef unsigned long long umax;
63 # define P_UMAX "%llu"
65 typedef unsigned long umax;
69 /* --- Table of interesting types --- *
71 * These are in preference order.
86 { "unsigned int", "u", UINT_MAX, 0 },
87 { "unsigned short", "u", USHRT_MAX, 0 },
88 { "unsigned long", "ul", ULONG_MAX, 0 },
90 { "unsigned long long", "ull", EXT ULLONG_MAX, f_ext },
93 { "uintmax_t", "u", UINTMAX_MAX, f_stdint },
98 typedef struct itype itype;
100 /*----- Main code ---------------------------------------------------------*/
102 int main(int argc, char *argv[])
105 itype *largest, *mpw, *mpd;
106 const static char *extstr = "CATACOMB_MPTYPES_EXTENSION ";
108 /* --- Find the bitcounts --- */
110 for (i = tytab; i->name; i++) {
113 for (bits = 0; u; bits++)
118 /* --- Now try to find the interesting types --- *
120 * The first thing to do is to find the largest type. Then I find the
121 * `best' type which is less than half that size, and then the `best' type
122 * which is twice as big as that one.
126 for (i = tytab; i->name; i++) {
127 if (i->bits > largest->bits)
130 for (mpw = 0, i = tytab; i->name; i++) {
131 if (i->bits * 2 <= largest->bits && (!mpw || i->bits > mpw->bits))
136 for (mpd = 0, i = tytab; i->name; i++) {
137 if (i->bits >= mpw->bits * 2 && (!mpd || i->bits < mpd->bits))
143 w.bits /= 2; w.max = ~(~((umax)0) << w.bits);
144 d.bits = w.bits * 2; d.max = ~(~((umax)0) << d.bits);
148 /* --- Output time --- */
153 * mptypes.h [generated]\n\
156 #ifndef CATACOMB_MPTYPES_H\n\
157 #define CATACOMB_MPTYPES_H\n\
159 if ((mpd->flags | mpw->flags) & f_stdint) {
161 #if __STDC_VERSION__ >= 199900l\n\
162 # include <stdint.h>\n\
166 if ((mpd->flags | mpw->flags) & f_ext) {
168 #if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 91)\n\
169 # define %s __extension__\n\
177 #define MPW_BITS %u\n\
178 #define MPW_MAX %s" P_UMAX "%s\n\
181 #define MPD_BITS %u\n\
182 #define MPD_MAX %s" P_UMAX "%s\n\
186 mpw->flags & f_ext ? extstr : "", mpw->name,
188 mpw->flags & f_ext ? extstr : "", mpw->max, mpw->suff,
189 mpd->flags & f_ext ? extstr : "", mpd->name,
191 mpd->flags & f_ext ? extstr : "", mpd->max, mpd->suff);
196 /*----- That's all, folks -------------------------------------------------*/