78 lines
2.2 KiB
C++
78 lines
2.2 KiB
C++
/* Conformance Test 17.6.0.2: Verification of fgetc, getc, and ungetc with */
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/* a binary stream */
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#include <stdio.h>
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main ()
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{
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FILE *f1;
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int i, j;
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char ch;
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f1 = fopen ("3/tmp", "w+b"); /* create binary file to work on */
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if (f1 == NULL)
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goto Fail1;
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for (ch = 'a', i = 0; i < 26; i++)
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{
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j = fputc (ch, f1);
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if ((char) j != ch)
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goto Fail2;
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ch++;
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}
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rewind (f1); /* check file contents with fgetc */
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ch = 'a';
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while ((i = fgetc (f1)) != EOF)
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if ( (char) i != ch++ )
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goto Fail;
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if (! (feof (f1)) ) /* ensure end-of-file reached */
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goto Fail;
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j = ungetc (i, f1); /* not an error to try to push */
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if (j != EOF) /* back EOF */
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goto Fail;
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j = fseek (f1, 0L, SEEK_SET); /* test getc with temp file */
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if (j)
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goto Fail3;
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j = ungetc (i, f1); /* ungetc should return an error */
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if (j != EOF) /* after seeking on the file */
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goto Fail; /* before reading */
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ch = 'a';
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while ((i = getc (f1)) != EOF)
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if ( (char) i != ch++ )
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goto Fail;
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if (! (feof (f1)) ) /* ensure end-of-file reached */
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goto Fail;
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j = ungetc (i, f1); /* not an error to try to push */
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if (j != EOF) /* back EOF */
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goto Fail;
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i = fclose (f1); /* close the file and quit */
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if (i == EOF)
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goto Fail4;
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printf ("Passed Conformance Test 17.6.0.2\n");
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return;
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Fail:
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printf ("Failed Conformance Test 17.6.0.2\n");
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return;
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Fail1:
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printf ("Unable to open temp file for Conformance Test 17.6.0.2\n");
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return;
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Fail2:
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printf ("Unable to write to temp file for Conformance Test 17.6.0.2\n");
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return;
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Fail3:
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printf ("Unable to seek to temp file for Conformance Test 17.6.0.2\n");
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return;
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Fail4:
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printf ("Unable to close temp file for Conformance Test 17.6.0.2\n");
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return;
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}
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