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/*
* getsizes.c -- get sizeof() various data types and print it.
*
* Copyright (C) 1999-2000 by Massimiliano Ghilardi
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
*/
#include <stdio.h>
#include <time.h>
#include <sys/types.h>
#include <sys/mman.h>
#include "autoconf.h"
#ifdef HAVE_FCNTL_H
# include <fcntl.h>
#endif
/* This mess was adapted from the GNU getpagesize.h. */
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif
#ifndef HAVE_GETPAGESIZE
# ifdef _SC_PAGESIZE
# define getpagesize() sysconf(_SC_PAGESIZE)
# else /* no _SC_PAGESIZE */
# ifdef HAVE_ASM_PAGE_H
# include <asm/page.h>
# endif
# ifdef HAVE_SYS_PARAM_H
# include <sys/param.h>
# endif
# ifdef EXEC_PAGESIZE
# define getpagesize() EXEC_PAGESIZE
# else /* no EXEC_PAGESIZE */
# ifdef NBPG
# define getpagesize() NBPG * CLSIZE
# ifndef CLSIZE
# define CLSIZE 1
# endif /* no CLSIZE */
# else /* no NBPG */
# ifdef NBPC
# define getpagesize() NBPC
# else /* no NBPC */
# ifdef PAGE_SIZE
# define getpagesize() PAGE_SIZE
# else /* no PAGE_SIZE */
# ifdef PAGESIZE
# define getpagesize() PAGESIZE
# endif /* no PAGESIZE */
# endif /* no PAGE_SIZE */
# endif /* no NBPC */
# endif /* no NBPG */
# endif /* no EXEC_PAGESIZE */
# endif /* no _SC_PAGESIZE */
#endif /* no HAVE_GETPAGESIZE */
#include "Tw/datatypes.h"
char endian_str[sizeof(uldat)] = "\1\2\3\4";
typedef unsigned long ul;
#define UL "ul"
#define LX "%lX"
int main(void) {
char *byte_order, *str_byte16, *str_byte32;
if (*(uldat *)endian_str == (uldat)0x04030201)
byte_order = "1234"; /* little endian */
else if (*(uldat *)endian_str == ((uldat)0x01020304 << ((sizeof(uldat)-4) * 8) ))
byte_order = "4321"; /* big endian */
else {
fprintf(stderr, "Fatal: cannot determine byte order: not little endian, not big endian!\n"
" endianity test on string \"\\1\\2\\3\\4\" returned 0x" LX "!\n",
(ul)*(uldat *)endian_str);
return 1;
}
if (sizeof(byte) != 1 || sizeof(udat) < 2 || sizeof(uldat) < 4 ||
sizeof(hwcol) != 1 || sizeof(time_t) < 4 || sizeof(frac_t) < 4) {
fprintf(stderr, "Fatal: minimum requirements on data sizes not satisfied.\nSee scripts/getsizes.c\n");
return 1;
}
if (sizeof(udat) == 2)
str_byte16 = "udat";
else if (sizeof(unsigned short) == 2)
str_byte16 = "unsigned short";
else {
fprintf(stderr, "Fatal: could not find a 16-bit type to use as byte16.\nSee scripts/getsizes.c\n");
return 1;
}
if (sizeof(udat) == 4)
str_byte32 = "udat";
else if (sizeof(uldat) == 4)
str_byte32 = "uldat";
else if (sizeof(unsigned int) == 4)
str_byte32 = "unsigned int";
else if (sizeof(unsigned long) == 4)
str_byte32 = "unsigned long";
else {
fprintf(stderr, "Fatal: could not find a 32-bit type to use as byte32.\nSee scripts/getsizes.c\n");
return 1;
}
if (sizeof(time_t) > sizeof(tlargest)) {
fprintf(stderr, "Fatal: `time_t' is %d bytes, which is bigger than `tlargest' (%d bytes).\n"
"Please edit include/Tw/datatypes.h and use a wider type for `tlargest'.\n", sizeof(time_t), sizeof(tlargest));
return 1;
}
/*
* note about MINDAT, MINLDAT, MINTIME_T:
* if the type is unsigned, -(ul)0 == 0;
* if the type is signed, extending to (ul) will fill higher bytes with 0xFF.
* For example doing (ul)0x80000000 when (ul) is 8 bytes will give
* 0xFFFFFFFF80000000, and -(ul)0x80000000 will give back the correct 0x80000000.
*/
printf("\n"
"/*\n"
" * This file was automatically generated by 'scripts/Getsizes'. Do no edit!\n"
" */\n"
"\n"
"#ifndef _TW_DATASIZES_H\n"
"#define _TW_DATASIZES_H\n"
"\n"
"#define TW_SIZEOFBYTE %d\n"
"#define TW_SIZEOFUDAT %d\n"
"#define TW_SIZEOFULDAT %d\n"
"#define TW_SIZEOFTIME_T %d\n"
"#define TW_SIZEOFFRAC_T %d\n"
"#define TW_SIZEOFTLARGEST %d\n"
"#define TW_SIZEOFVOIDP %d\n"
"\n"
"#define TW_MAXNUM 0x" LX "\n"
"#define TW_MAXBYTE 0x" LX "\n"
"#define TW_MAXDAT 0x" LX "\n"
"#define TW_MAXUDAT 0x" LX "\n"
"#define TW_MAXLDAT 0x" LX "\n"
"#define TW_MAXULDAT 0x" LX "\n"
"#define TW_MAXTIME_T 0x" LX "\n"
"#define TW_MAXFRAC_T 0x" LX "\n"
"#define TW_MAXTLARGEST 0x" LX "\n"
"\n"
"#define TW_MINNUM 0x" LX "\n"
"#define TW_MINDAT 0x" LX "\n"
"#define TW_MINLDAT 0x" LX "\n"
"#define TW_MINTIME_T 0x" LX "\n"
"#define TW_MINFRAC_T 0x" LX "\n"
"\n"
"#define TW_BYTE16 %s\n"
"#define TW_BYTE32 %s\n"
"\n"
"#define TW_PAGE_SIZE %d\n"
"\n"
"#define TW_BYTE_ORDER %s\n"
"#define TW_LITTLE_ENDIAN 1234\n"
"#define TW_BIG_ENDIAN 4321\n"
"\n"
"#endif /* _TW_DATASIZES_H */\n",
sizeof(byte), sizeof(udat), sizeof(uldat),
sizeof(time_t), sizeof(frac_t), sizeof(tlargest),
sizeof(void *),
(ul)MAXNUM, (ul)MAXBYTE,
(ul)MAXDAT, (ul)MAXUDAT,
(ul)MAXLDAT, (ul)MAXULDAT,
(ul)MAXTIME_T, (ul)MAXFRAC_T,
(ul)MAXTLARGEST,
-(ul)MINNUM, -(ul)MINDAT, -(ul)MINLDAT,
-(ul)MINTIME_T, -(ul)MINFRAC_T,
str_byte16,
str_byte32,
(int)getpagesize(),
byte_order
);
return 0;
}
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