- 114 名前：デフォルトの名無しさん mailto:sage [2008/11/03(月) 12:40:22 ]
- >>112
#include <stdio.h>
#include <limits.h>
int is_little_endian(){
int x = 1;
return *(char*)&x;
}
typedef unsigned char byte_t;
void print_bytebits_(byte_t value){
byte_t mask = 1 << (sizeof(byte_t) * CHAR_BIT - 1);
for(;mask; mask >>=1) putchar(mask & value ? '1' : '0');
}
void print_bits(void *p, int bytesize){
byte_t *p_byte = (byte_t*)p;
int i;
if(is_little_endian()){
for(i=bytesize-1; i>=0; i--) print_bytebits_(p_byte[i]);
}else{
for(i=0; i<bytesize; i++) print_bytebits_(p_byte[i]);
}
}
int main(){
double values[] = {1.0, 0.1, 0.0/0.0, -1.0/0.0, 1.0/0.0, -3.14};
int i;
for(i=0; i<sizeof(values)/sizeof(*values); i++){
print_bits(&values[i], sizeof(double));
printf("(%.02f)\n", values[i]);
}
return 0;
}
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