ORCA-C/Tests/Conformance/C17.6.0.1.CC

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/* Conformance Test 17.6.0.1: Verification of fgetc, getc, and ungetc with */
/* a text stream */
#include <stdio.h>
main ()
{
FILE *f1;
int i, j;
char ch;
f1 = fopen ("3/tmp", "w+"); /* create text file to work on */
if (f1 == NULL)
goto Fail1;
for (ch = 'a', i = 0; i < 26; i++)
{
j = fputc (ch, f1);
if ((char) j != ch)
goto Fail2;
ch++;
}
j = fputc ('\r', f1); /* text files end with return */
if (j != '\r')
goto Fail2;
rewind (f1); /* check file contents with fgetc */
for (ch = 'a', i = 0; i < 26; i++)
{
j = fgetc (f1);
if ( (char) j != ch++ )
goto Fail;
}
i = ungetc ('F', f1); /* test ungetc */
if (i != 'F')
goto Fail;
i = fgetc (f1);
if (i != 'F')
goto Fail;
i = fgetc (f1);
if (i != '\n')
goto Fail;
i = fgetc (f1);
if (! (feof (f1)) ) /* ensure end-of-file reached */
goto Fail;
j = ungetc (i, f1); /* not an error to try to push */
if (j != EOF) /* back EOF */
goto Fail;
j = fseek (f1, 0L, SEEK_SET); /* test getc with temp file */
if (j)
goto Fail3;
j = ungetc (i, f1); /* ungetc should return an error */
if (j != EOF) /* after seeking on the file */
goto Fail; /* before reading */
for (ch = 'a', i = 0; i < 26; i++)
{
j = getc (f1);
if ( (char) j != ch++ )
goto Fail;
}
i = ungetc ('L', f1); /* test ungetc */
if (i != 'L')
goto Fail;
i = fgetc (f1);
if (i != 'L')
goto Fail;
i = getc (f1);
if (i != '\n')
goto Fail;
i = getc (f1);
if (! (feof (f1)) ) /* ensure end-of-file reached */
goto Fail;
j = ungetc (i, f1); /* not an error to try to push */
if (j != EOF) /* back EOF */
goto Fail;
i = fclose (f1); /* close the file and quit */
if (i == EOF)
goto Fail4;
printf ("Passed Conformance Test 17.6.0.1\n");
return;
Fail:
printf ("Failed Conformance Test 17.6.0.1\n");
return;
Fail1:
printf ("Unable to open temp file for Conformance Test 17.6.0.1\n");
return;
Fail2:
printf ("Unable to write to temp file for Conformance Test 17.6.0.1\n");
return;
Fail3:
printf ("Unable to seek to temp file for Conformance Test 17.6.0.1\n");
return;
Fail4:
printf ("Unable to close temp file for Conformance Test 17.6.0.1\n");
return;
}