3 * $Id: mptypes.c,v 1.2 1999/11/13 01:54:32 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 /*----- Revision history --------------------------------------------------*
33 * Revision 1.2 1999/11/13 01:54:32 mdw
34 * Format source code properly ;-). Attach suffixes to the `max'
39 /*----- Header files ------------------------------------------------------*/
44 #if __STDC_VERSION__ >= 199900l
48 /*----- Data types --------------------------------------------------------*/
50 /* --- Hack for GCC --- *
52 * WG14 in their infinite wisdom decided not to use the GCC constant name.
55 #if defined(ULONG_LONG_MAX) && !defined(ULLONG_MAX)
56 # define ULLONG_MAX ULONG_LONG_MAX
59 /* --- Choose the largest integer type --- */
61 #if defined(UINTMAX_MAX)
62 typedef uintmax_t umax;
63 # define P_UMAX PRIuMAX
64 #elif defined(ULLONG_MAX)
65 typedef unsigned long long umax;
66 # define P_UMAX "%llu"
68 typedef unsigned long umax;
72 /* --- Table of interesting types --- *
74 * These are in preference order.
88 { "unsigned int", "u", UINT_MAX, 0 },
89 { "unsigned short", "u", USHRT_MAX, 0 },
90 { "unsigned long", "ul", ULONG_MAX, 0 },
92 { "unsigned long long", "ull", ULLONG_MAX, 0 },
95 { "uintmax_t", "u", UINTMAX_MAX, f_stdint },
100 typedef struct itype itype;
102 /*----- Main code ---------------------------------------------------------*/
104 int main(int argc, char *argv[])
107 itype *largest, *mpw, *mpd;
109 /* --- Find the bitcounts --- */
111 for (i = tytab; i->name; i++) {
114 for (bits = 0; u; bits++)
119 /* --- Now try to find the interesting types --- *
121 * The first thing to do is to find the largest type. Then I find the
122 * `best' type which is less than half that size, and then the `best' type
123 * which is twice as big as that one.
127 for (i = tytab; i->name; i++) {
128 if (i->bits > largest->bits)
131 for (mpw = 0, i = tytab; i->name; i++) {
132 if (i->bits * 2 <= largest->bits && (!mpw || i->bits > mpw->bits))
137 for (mpd = 0, i = tytab; i->name; i++) {
138 if (i->bits >= mpw->bits * 2 && (!mpd || i->bits < mpd->bits))
144 w.bits /= 2; w.max = ~(~((umax)0) << w.bits);
145 d.bits = w.bits * 2; d.max = ~(~((umax)0) << d.bits);
149 /* --- Output time --- */
154 * mptypes.h [generated]\n\
160 if ((mpd->flags | mpw->flags) & f_stdint) {
162 #if __STDC_VERSION__ >= 199900l\n\
163 # include <stdint.h>\n\
169 #define MPW_BITS %u\n\
170 #define MPW_MAX " P_UMAX "%s\n\
173 #define MPD_BITS %u\n\
174 #define MPD_MAX " P_UMAX "%s\n\
178 mpw->name, mpw->bits, mpw->max, mpw->suff,
179 mpd->name, mpd->bits, mpd->max, mpd->suff);
183 /*----- That's all, folks -------------------------------------------------*/