49051f8ea4
This patch fixes a warning "variable 'wc' set but not used" in libio/bug-ungetwc1.c. The test didn't verify much about the results of the functions it called. This patch makes it check the result of getwc (thereby fixing the warning), check end of file does not arrive too late in the getwc loop, and check EOF is no longer set after ungetwc. Tested for x86_64. * libio/bug-ungetwc1.c (do_test): Verify results of getwc and feof.
92 lines
1.8 KiB
C
92 lines
1.8 KiB
C
#define _XOPEN_SOURCE 500
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#include <stdio.h>
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#include <stdlib.h>
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#include <locale.h>
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#include <wchar.h>
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const char write_chars[] = "ABC"; /* Characters on testfile. */
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const wint_t unget_wchar = L'A'; /* Ungotten wide character. */
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char *fname;
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static int do_test (void);
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#define TEST_FUNCTION do_test ()
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#include "../test-skeleton.c"
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static int
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do_test (void)
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{
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wint_t wc;
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FILE *fp;
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int fd;
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fname = (char *) malloc (strlen (test_dir) + sizeof "/bug-ungetwc1.XXXXXX");
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if (fname == NULL)
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{
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puts ("no memory");
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return 1;
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}
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strcpy (stpcpy (fname, test_dir), "/bug-ungetwc1.XXXXXX");
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fd = mkstemp (fname);
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if (fd == -1)
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{
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printf ("cannot open temporary file: %m\n");
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return 1;
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}
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add_temp_file (fname);
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setlocale(LC_ALL, "");
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/* Output to the file. */
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if ((fp = fdopen (fd, "w")) == NULL)
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{
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fprintf (stderr, "Cannot make `%s' file\n", fname);
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exit (EXIT_FAILURE);
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}
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fprintf (fp, "%s", write_chars);
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fclose (fp);
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/* Read from the file. */
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fp = fopen (fname, "r");
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size_t i = 0;
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while (!feof (fp))
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{
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wc = getwc (fp);
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if (i >= sizeof (write_chars))
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{
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printf ("Did not get end-of-file when expected.\n");
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return 1;
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}
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else if (wc != (write_chars[i] ? write_chars[i] : WEOF))
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{
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printf ("Unexpected %lu from getwc.\n", (unsigned long int) wc);
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return 1;
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}
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i++;
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}
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printf ("\nThe end-of-file indicator is set.\n");
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/* Unget a wide character. */
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ungetwc (unget_wchar, fp);
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printf ("< `%lc' is ungotten.\n", unget_wchar);
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/* Check the end-of-file indicator. */
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if (feof (fp))
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{
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printf ("The end-of-file indicator is still set.\n");
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return 1;
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}
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else
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printf ("The end-of-file flag is cleared.\n");
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fflush (stdout);
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fclose (fp);
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return 0;
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}
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