Mercurial > gnulib
view tests/test-fseek.c @ 40196:e63f5d3edab5
relocatable-prog: Update documentation.
* doc/relocatable-maint.texi (Supporting Relocation): Update to match
the recent changes.
author | Bruno Haible <bruno@clisp.org> |
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date | Sun, 24 Feb 2019 01:49:15 +0100 |
parents | b06060465f09 |
children |
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/* Test of fseek() function. Copyright (C) 2007-2019 Free Software Foundation, Inc. This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see <https://www.gnu.org/licenses/>. */ /* Written by Bruno Haible <bruno@clisp.org>, 2007. */ #include <config.h> /* None of the files accessed by this test are large, so disable the fseek link warning if the user requested GNULIB_POSIXCHECK. */ #define _GL_NO_LARGE_FILES #include <stdio.h> #include "signature.h" SIGNATURE_CHECK (fseek, int, (FILE *, long, int)); #include "macros.h" #ifndef FUNC_UNGETC_BROKEN # define FUNC_UNGETC_BROKEN 0 #endif int main (int argc, char **argv) { /* Assume stdin is non-empty, seekable, and starts with '#!/bin/sh' iff argc > 1. */ int expected = argc > 1 ? 0 : -1; ASSERT (fseek (stdin, 0, SEEK_CUR) == expected); if (argc > 1) { /* Test that fseek discards previously read ungetc data. */ int ch = fgetc (stdin); ASSERT (ch == '#'); ASSERT (ungetc (ch, stdin) == ch); ASSERT (fseek (stdin, 2, SEEK_SET) == 0); ch = fgetc (stdin); ASSERT (ch == '/'); if (2 < argc) { if (FUNC_UNGETC_BROKEN) { fputs ("Skipping test: ungetc cannot handle arbitrary bytes\n", stderr); return 77; } /* Test that fseek discards random ungetc data. */ ASSERT (ungetc (ch ^ 0xff, stdin) == (ch ^ 0xff)); } ASSERT (fseek (stdin, 0, SEEK_END) == 0); ASSERT (fgetc (stdin) == EOF); /* Test that fseek resets end-of-file marker. */ ASSERT (feof (stdin)); ASSERT (fseek (stdin, 0, SEEK_END) == 0); ASSERT (!feof (stdin)); } return 0; }