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constants.c
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104 lines (85 loc) · 3 KB
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#include <stdio.h>
#include <stdlib.h>
#include <limits.h>
#include <getopt.h>
#include <inttypes.h>
#define TMIN INT_MIN
#define TMIN_DEC -2147483648
#define TMIN_HEX 0x80000000
#define STMIN_DEC "-2147483648"
#define STMIN_HEX "0x80000000"
/* Different C dialects */
typedef enum { GCC, C89, C99, C11 } lang_t;
char *langs[4] = {"GCC", "C89", "C99", "C11"};
/* This can be overridden by command line flag */
#ifndef LANG
#define LANG GCC
#endif
#define COMP_ZERO(x) ((x) < 0 ? "<" : (x) > 0 ? ">" : "=")
#define COMP_TMIN(x) ((x) < TMIN ? "<" : (x) > TMIN ? ">" : "=")
#define TWICE(x) (2*(x))
char *comp_zero(int x)
{
return COMP_ZERO(x);
}
char *comp_tmin(int x)
{
return COMP_TMIN(x);
}
int main(int argc, char *argv[])
{
int terse_mode = 0;
int print_header = 0;
int word_size = 8*sizeof(long);
char *dialect = langs[LANG];
int64_t tmin_dec_val = (int64_t) TMIN_DEC;
int64_t tmin_hex_val = (int64_t) TMIN_HEX;
char * CZd = COMP_ZERO(TMIN_DEC);
char * CZh = COMP_ZERO(TMIN_HEX);
char * czd = comp_zero(TMIN_DEC);
char * czh = comp_zero(TMIN_HEX);
int64_t TWICEd = TWICE(TMIN_DEC);
int64_t TWICEh = TWICE(TMIN_HEX);
int c;
while ((c = getopt(argc, argv, "th")) != -1) {
switch (c) {
case 't':
terse_mode = 1;
break;
case 'h':
print_header = 1;
break;
default:
break;
}
}
if (terse_mode) {
if (print_header) {
printf("word size:dialect:decimal:hex:CZ decimal: CZ hex:cz decimal:cz hex:2x decimal:2x hex\n");
}
printf("%d:%s:%lld:%lld:%s:%s:%s:%s:%lld:%lld\n",
word_size, dialect, tmin_dec_val, tmin_hex_val,
CZd, CZh, czd, czh,
TWICEd, TWICEh);
} else {
printf("Long word size = %d\n", (int) (8*sizeof(long)));
printf("Dialect = %s\n", langs[LANG]);
printf(" COMP_ZERO\n");
printf("\t%s\t(0x%" PRIx64 ") %s 0\n", STMIN_DEC, (int64_t) TMIN_DEC, COMP_ZERO(TMIN_DEC));
printf("\t%s\t(0x%" PRIx64 ") %s 0\n", STMIN_HEX, (int64_t) TMIN_HEX, COMP_ZERO(TMIN_HEX));
printf(" COMP_TMIN\n");
printf("\t%s\t(0x%" PRIx64 ") %s %s\n", STMIN_DEC, (int64_t) TMIN_DEC, COMP_TMIN(TMIN_DEC), STMIN_DEC);
printf("\t%s\t(0x%" PRIx64 ") %s %s\n", STMIN_HEX, (int64_t) TMIN_HEX, COMP_TMIN(TMIN_HEX), STMIN_DEC);
printf(" comp_zero\n");
printf("\t%s\t(0x%" PRIx64 ") %s 0\n", STMIN_DEC, (int64_t) TMIN_DEC, comp_zero(TMIN_DEC));
printf("\t%s\t(0x%" PRIx64 ") %s 0\n", STMIN_HEX, (int64_t) TMIN_HEX, comp_zero(TMIN_HEX));
printf(" comp_tmin\n");
printf("\t%s\t(0x%" PRIx64 ") %s %s\n", STMIN_DEC, (int64_t) TMIN_DEC, comp_tmin(TMIN_DEC), STMIN_DEC);
printf("\t%s\t(0x%" PRIx64 ") %s %s\n", STMIN_HEX, (int64_t) TMIN_HEX, comp_tmin(TMIN_HEX), STMIN_DEC);
printf(" TWICE\n");
printf("\t2*%s\t(2*0x%" PRIx64 ") = %lld (0x%" PRIx64 ")\n", STMIN_DEC, (int64_t) TMIN_DEC, (int64_t) TWICE(TMIN_DEC), (int64_t) TWICE(TMIN_DEC));
printf("\t2*%s\t(2*0x%" PRIx64 ") = %lld (0x%" PRIx64 ")\n", STMIN_HEX, (int64_t) TMIN_HEX, (int64_t) TWICE(TMIN_HEX), (int64_t) TWICE(TMIN_HEX));
printf("\n");
}
return 0;
}