3 * $Id: mptypes.c,v 1.4 2000/10/08 12:05:24 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 1.4 2000/10/08 12:05:24 mdw
34 * Make later versions of GCC shut up about @long long@.
36 * Revision 1.3 1999/12/10 23:29:48 mdw
37 * Change header file guard names.
39 * Revision 1.2 1999/11/13 01:54:32 mdw
40 * Format source code properly ;-). Attach suffixes to the `max'
45 /*----- Header files ------------------------------------------------------*/
50 #if __STDC_VERSION__ >= 199900l
54 /*----- Data types --------------------------------------------------------*/
56 /* --- Hack for GCC --- *
58 * WG14 in their infinite wisdom decided not to use the GCC constant name.
61 #if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 91)
62 # define EXT __extension__
67 #if defined(ULONG_LONG_MAX) && !defined(ULLONG_MAX)
68 # define ULLONG_MAX ULONG_LONG_MAX
71 /* --- Choose the largest integer type --- */
73 #if defined(UINTMAX_MAX)
74 typedef uintmax_t umax
;
75 # define P_UMAX PRIuMAX
76 #elif defined(ULLONG_MAX)
77 __extension__
typedef unsigned long long umax
;
78 # define P_UMAX "%llu"
80 typedef unsigned long umax
;
84 /* --- Table of interesting types --- *
86 * These are in preference order.
101 { "unsigned int", "u", UINT_MAX
, 0 },
102 { "unsigned short", "u", USHRT_MAX
, 0 },
103 { "unsigned long", "ul", ULONG_MAX
, 0 },
105 { "unsigned long long", "ull", EXT ULLONG_MAX
, f_ext
},
108 { "uintmax_t", "u", UINTMAX_MAX
, f_stdint
},
113 typedef struct itype itype
;
115 /*----- Main code ---------------------------------------------------------*/
117 int main(int argc
, char *argv
[])
120 itype
*largest
, *mpw
, *mpd
;
121 const static char *extstr
= "CATACOMB_MPTYPES_EXTENSION ";
123 /* --- Find the bitcounts --- */
125 for (i
= tytab
; i
->name
; i
++) {
128 for (bits
= 0; u
; bits
++)
133 /* --- Now try to find the interesting types --- *
135 * The first thing to do is to find the largest type. Then I find the
136 * `best' type which is less than half that size, and then the `best' type
137 * which is twice as big as that one.
141 for (i
= tytab
; i
->name
; i
++) {
142 if (i
->bits
> largest
->bits
)
145 for (mpw
= 0, i
= tytab
; i
->name
; i
++) {
146 if (i
->bits
* 2 <= largest
->bits
&& (!mpw
|| i
->bits
> mpw
->bits
))
151 for (mpd
= 0, i
= tytab
; i
->name
; i
++) {
152 if (i
->bits
>= mpw
->bits
* 2 && (!mpd
|| i
->bits
< mpd
->bits
))
158 w
.bits
/= 2; w
.max
= ~(~((umax
)0) << w
.bits
);
159 d
.bits
= w
.bits
* 2; d
.max
= ~(~((umax
)0) << d
.bits
);
163 /* --- Output time --- */
168 * mptypes.h [generated]\n\
171 #ifndef CATACOMB_MPTYPES_H\n\
172 #define CATACOMB_MPTYPES_H\n\
174 if ((mpd
->flags
| mpw
->flags
) & f_stdint
) {
176 #if __STDC_VERSION__ >= 199900l\n\
177 # include <stdint.h>\n\
181 if ((mpd
->flags
| mpw
->flags
) & f_ext
) {
183 #if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 91)\n\
184 # define %s __extension__\n\
192 #define MPW_BITS %u\n\
193 #define MPW_MAX %s" P_UMAX
"%s\n\
196 #define MPD_BITS %u\n\
197 #define MPD_MAX %s" P_UMAX
"%s\n\
201 mpw
->flags
& f_ext ? extstr
: "", mpw
->name
,
203 mpw
->flags
& f_ext ? extstr
: "", mpw
->max
, mpw
->suff
,
204 mpd
->flags
& f_ext ? extstr
: "", mpd
->name
,
206 mpd
->flags
& f_ext ? extstr
: "", mpd
->max
, mpd
->suff
);
211 /*----- That's all, folks -------------------------------------------------*/