minix/commands/autil/asize.c

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2005-04-21 16:53:53 +02:00
/* @(#)asize.c 1.4 */
#define ushort unsigned short
#include <stdio.h>
#include "out.h"
/*
asize -- determine object size
*/
main(argc, argv)
char **argv;
{
struct outhead buf;
struct outsect sbuf;
ushort nrsect;
long sum;
int gorp;
FILE *f;
if (--argc == 0) {
argc = 1;
argv[1] = "a.out";
}
gorp = argc;
while(argc--) {
if ((f = fopen(*++argv, "r"))==NULL) {
fprintf(stderr, "asize: cannot open %s\n", *argv);
continue;
}
getofmt ((char *)&buf, SF_HEAD , f);
if(BADMAGIC(buf)) {
fprintf(stderr, "asize: %s-- bad format\n", *argv);
fclose(f);
continue;
}
nrsect = buf.oh_nsect;
if (nrsect == 0) {
fprintf(stderr, "asize: %s-- no sections\n", *argv);
fclose(f);
continue;
}
if (gorp > 1)
printf("%s: ", *argv);
sum = 0;
while (nrsect-- > 0) {
getofmt ((char *)&sbuf, SF_SECT , f);
printf("%ld", sbuf.os_size);
sum += sbuf.os_size;
if (nrsect > 0)
putchar('+');
}
printf(" = %ld = 0x%lx\n", sum, sum);
fclose(f);
}
}
getofmt(p, s, f)
register char *p;
register char *s;
register FILE *f;
{
register i;
register long l;
for (;;) {
switch (*s++) {
/* case '0': p++; continue; */
case '1':
*p++ = getc(f);
continue;
case '2':
i = getc(f);
i |= (getc(f) << 8);
*((short *)p) = i; p += sizeof(short);
continue;
case '4':
l = (long)getc(f);
l |= ((long)getc(f) << 8);
l |= ((long)getc(f) << 16);
l |= ((long)getc(f) << 24);
*((long *)p) = l; p += sizeof(long);
continue;
default:
case '\0':
break;
}
break;
}
}