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Annotation of 43BSD/contrib/mh/sbr/fdcompare.c, revision 1.1.1.1

1.1       root        1: /* fdcompare.c - are two files identical? */
                      2: 
                      3: #include "../h/mh.h"
                      4: #include <stdio.h>
                      5: 
                      6: long lseek();
                      7: 
                      8: 
                      9: fdcompare (fd1, fd2)
                     10: register int fd1,
                     11:             fd2;
                     12: {
                     13:     register int    i,
                     14:                    n1,
                     15:                     n2,
                     16:                     resp;
                     17:     register char  *c1,
                     18:                    *c2;
                     19:     char    b1[BUFSIZ],
                     20:             b2[BUFSIZ];
                     21: 
                     22:     resp = 1;
                     23:     while ((n1 = read (fd1, b1, sizeof b1)) >= 0
                     24:            && (n2 = read (fd2, b2, sizeof b2)) >= 0
                     25:            && n1 == n2) {
                     26:        c1 = b1;
                     27:        c2 = b2;
                     28:        for (i = n1 < sizeof b1 ? n1 : sizeof b1; i--;)
                     29:            if (*c1++ != *c2++) {
                     30:                resp = 0;
                     31:                goto leave;
                     32:            }
                     33:        if (n1 < sizeof b1)
                     34:            goto leave;
                     35:     }
                     36:     resp = 0;
                     37: 
                     38: leave: ;
                     39:     (void) lseek (fd1, 0L, 0);
                     40:     (void) lseek (fd2, 0L, 0);
                     41:     return resp;
                     42: }

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