source: trunk/minix/commands/autil/asize.c@ 15

/* @(#)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;
        }
}