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
37 # include <inttypes.h>
40 /*----- Data types --------------------------------------------------------*/
42 /* --- Hack for GCC --- *
44 * WG14 in their infinite wisdom decided not to use the GCC constant name.
47 #if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 91)
48 # define EXT __extension__
53 #if defined(ULONG_LONG_MAX) && !defined(ULLONG_MAX)
54 # define ULLONG_MAX ULONG_LONG_MAX
57 /* --- Choose the largest integer type --- */
59 #if defined(UINTMAX_MAX)
60 typedef uintmax_t umax
;
61 # define P_UMAX PRIuMAX
62 #elif defined(ULLONG_MAX)
63 __extension__
typedef unsigned long long umax
;
66 typedef unsigned long umax
;
70 /* --- Table of interesting types --- *
72 * These are in preference order.
87 { "unsigned int", "u", UINT_MAX
, 0 },
88 { "unsigned short", "u", USHRT_MAX
, 0 },
89 { "unsigned long", "ul", ULONG_MAX
, 0 },
91 { "unsigned long long", "ull", EXT ULLONG_MAX
, f_ext
},
94 { "uintmax_t", "u", UINTMAX_MAX
, f_stdint
},
99 typedef struct itype itype
;
101 /*----- Main code ---------------------------------------------------------*/
103 int main(int argc
, char *argv
[])
106 itype
*largest
, *mpw
, *mpd
;
107 const static char *extstr
= "CATACOMB_MPTYPES_EXTENSION ";
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\
157 #ifndef CATACOMB_MPTYPES_H\n\
158 #define CATACOMB_MPTYPES_H\n\
160 if ((mpd
->flags
| mpw
->flags
) & f_stdint
) {
162 #if __STDC_VERSION__ >= 199900l\n\
163 # include <stdint.h>\n\
167 if ((mpd
->flags
| mpw
->flags
) & f_ext
) {
169 #if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 91)\n\
170 # define %s __extension__\n\
178 #define MPW_BITS %u\n\
179 #define MPW_MAX %s%" P_UMAX
"%s\n\
182 #define MPD_BITS %u\n\
183 #define MPD_MAX %s%" P_UMAX
"%s\n\
187 mpw
->flags
& f_ext ? extstr
: "", mpw
->name
,
189 mpw
->flags
& f_ext ? extstr
: "", mpw
->max
, mpw
->suff
,
190 mpd
->flags
& f_ext ? extstr
: "", mpd
->name
,
192 mpd
->flags
& f_ext ? extstr
: "", mpd
->max
, mpd
->suff
);
197 /*----- That's all, folks -------------------------------------------------*/