133 lines
2.8 KiB
C++
133 lines
2.8 KiB
C++
/* Conformance Test 17.5.0.2: Verification of fseek, rewind, and ftell */
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/* functions for text files */
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#include <stdio.h>
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main ()
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{
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FILE *f1; /* file pointer */
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int i, j, m;
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long L1;
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char s [254], ch1;
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char ch [254] = "a.b.c.d.e.f.g.h.i.j.k.l.m.n.o.p.q.r.s.t.u.v.w.x.y.z."
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"a.b.c.d.e.f.g.h.i.j.k.l.m.n.o.p.q.r.s.t.u.v.w.x.y.z."
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"a.b.c.d.e.f.g.h.i.j.k.l.m.n.o.p.q.r.s.t.u.v.w.x.y.z."
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"a.b.c.d.e.f.g.h.i.j.k.l.m.n.o.p.q.r.s.t.u.v.w.x.y.z."
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"A.B.C.D.E.F.G.H.I.J.K.L.M.N.O.P.Q.R.S.T.U.V.";
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f1 = fopen ("14:tmp", "w+"); /* create temporary file to work on */
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if (f1 == NULL)
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goto Fail1;
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for (i = 0; i < 100; i++) /* write 100 lines to the file */
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{
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j = fprintf (f1, "%s\n", ch);
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if (j == EOF)
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goto Fail2;
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}
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/* Test seek from beginning of file. */
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j = fseek (f1, 0L, SEEK_SET);
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if (j)
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goto Fail;
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for (i = 0; i < 100; i++) {
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j = fscanf (f1, "%s", s);
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if (j == EOF)
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goto Fail3;
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if (strcmp (s, ch))
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goto Fail;
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}
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/* Test seek from end of file. */
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j = fseek (f1, 0L, SEEK_END);
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if (j)
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goto Fail;
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j = fscanf (f1, "%c", &m);
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if (j != EOF)
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goto Fail3;
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/* Test ftell function. */
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L1 = ftell (f1);
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if (L1 != 25300)
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goto Fail;
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rewind (f1);
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L1 = ftell (f1);
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if (L1 != 0)
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goto Fail;
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ch1 = fgetc (f1);
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if (ch1 == EOF)
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goto Fail3;
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if (ch1 != 'a')
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goto Fail;
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ch1 = fgetc (f1);
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if (ch1 == EOF)
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goto Fail3;
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if (ch1 != '.')
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goto Fail;
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L1 = ftell (f1);
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if (L1 != 2)
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goto Fail;
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ch1 = fgetc (f1);
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if (ch1 == EOF)
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goto Fail3;
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if (ch1 != 'b')
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goto Fail;
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ch1 = fgetc (f1);
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if (ch1 == EOF)
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goto Fail3;
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if (ch1 != '.')
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goto Fail;
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ch1 = fgetc (f1);
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if (ch1 == EOF)
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goto Fail3;
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if (ch1 != 'c')
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goto Fail;
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j = fseek (f1, L1, SEEK_SET); /* verify that ftell-position works */
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if (j)
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goto Fail;
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ch1 = fgetc (f1);
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if (ch1 == EOF)
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goto Fail3;
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if (ch1 != 'b')
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goto Fail;
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/* Close the file and quit. */
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j = fclose (f1);
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if (j == EOF)
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goto Fail4;
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printf ("Passed Conformance Test 17.5.0.2\n");
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return;
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Fail:
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printf ("Failed Conformance Test 17.5.0.2\n");
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return;
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Fail1:
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printf ("Could not open tmp file for Conformance Test 17.5.0.2\n");
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return;
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Fail2:
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printf ("Could not write to file for Conformance Test 17.5.0.2\n");
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return;
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Fail3:
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printf ("Error while reading file for Conformance Test 17.5.0.2\n");
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return;
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Fail4:
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printf ("Could not close file for Conformance Test 17.5.0.2\n");
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return;
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}
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