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 -------------------------------------------------*/