Nevar pievienot vairāk kā 25 tēmas
Tēmai ir jāsākas ar burtu vai ciparu, tā var saturēt domu zīmes ('-') un var būt līdz 35 simboliem gara.
75 rindas
1.5 KiB
75 rindas
1.5 KiB
/* Display value of fixed point numbers */
|
|
#include <stdlib.h>
|
|
#include <stdio.h>
|
|
|
|
/* Extract hex/decimal/or float value from string */
|
|
static int get_num_val(char *sval, unsigned *valp) {
|
|
char *endp;
|
|
/* See if it's an integer or floating point */
|
|
int ishex = 0;
|
|
int isfloat = 0;
|
|
int i;
|
|
for (i = 0; sval[i]; i++) {
|
|
switch (sval[i]) {
|
|
case 'x':
|
|
case 'X':
|
|
ishex = 1;
|
|
break;
|
|
case 'e':
|
|
case 'E':
|
|
if (!ishex)
|
|
isfloat = 1;
|
|
break;
|
|
case '.':
|
|
isfloat = 1;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
if (isfloat) {
|
|
return 0; /* Not supposed to have a float here */
|
|
} else {
|
|
long long int llval = strtoll(sval, &endp, 0);
|
|
long long int upperbits = llval >> 31;
|
|
/* will give -1 for negative, 0 or 1 for positive */
|
|
if (valp && (upperbits == 0 || upperbits == -1 || upperbits == 1)) {
|
|
*valp = (unsigned) llval;
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
void show_int(unsigned uf)
|
|
{
|
|
printf("Hex = 0x%.8x,\tSigned = %d,\tUnsigned = %u\n",
|
|
uf, (int) uf, uf);
|
|
}
|
|
|
|
|
|
void usage(char *fname) {
|
|
printf("Usage: %s val1 val2 ...\n", fname);
|
|
printf("Values may be given in hex or decimal\n");
|
|
exit(0);
|
|
}
|
|
|
|
int main(int argc, char *argv[])
|
|
{
|
|
int i;
|
|
unsigned uf;
|
|
if (argc < 2)
|
|
usage(argv[0]);
|
|
for (i = 1; i < argc; i++) {
|
|
char *sval = argv[i];
|
|
if (get_num_val(sval, &uf)) {
|
|
show_int(uf);
|
|
} else {
|
|
printf("Cannot convert '%s' to 32-bit number\n", sval);
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
|
|
|