/* Test of ftello() function. Copyright (C) 2007-2013 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 . */ /* Written by Bruno Haible , 2007. */ #include /* None of the files accessed by this test are large, so disable the fseek link warning if we are not using the gnulib fseek module. */ #define _GL_NO_LARGE_FILES #include #include "signature.h" SIGNATURE_CHECK (ftello, off_t, (FILE *)); #include "binary-io.h" #include "macros.h" #ifndef FUNC_UNGETC_BROKEN # define FUNC_UNGETC_BROKEN 0 #endif int main (int argc, char **argv _GL_UNUSED) { int ch; /* Assume stdin is seekable iff argc > 1. */ if (argc == 1) { ASSERT (ftell (stdin) == -1); ASSERT (ftello (stdin) == -1); return 0; } /* mingw ftell is unreliable on text mode input. */ SET_BINARY (0); /* Simple tests. For each test, make sure ftell and ftello agree. */ ASSERT (ftell (stdin) == 0); ASSERT (ftello (stdin) == 0); ch = fgetc (stdin); ASSERT (ch == '#'); ASSERT (ftell (stdin) == 1); ASSERT (ftello (stdin) == 1); /* Test ftell after ungetc of read input. */ ch = ungetc ('#', stdin); ASSERT (ch == '#'); ASSERT (ftell (stdin) == 0); ASSERT (ftello (stdin) == 0); ch = fgetc (stdin); ASSERT (ch == '#'); ASSERT (ftell (stdin) == 1); ASSERT (ftello (stdin) == 1); /* Test ftell after fseek. */ ASSERT (fseek (stdin, 2, SEEK_SET) == 0); ASSERT (ftell (stdin) == 2); ASSERT (ftello (stdin) == 2); /* Test ftell after random ungetc. */ ch = fgetc (stdin); ASSERT (ch == '/'); ch = ungetc ('@', stdin); ASSERT (ch == '@'); ASSERT (ftell (stdin) == 2); ASSERT (ftello (stdin) == 2); ch = fgetc (stdin); ASSERT (ch == '@'); ASSERT (ftell (stdin) == 3); ASSERT (ftello (stdin) == 3); if (2 < argc) { if (FUNC_UNGETC_BROKEN) { fputs ("Skipping test: ungetc cannot handle arbitrary bytes\n", stderr); return 77; } /* Test ftell after ungetc without read. */ ASSERT (fseek (stdin, 0, SEEK_CUR) == 0); ASSERT (ftell (stdin) == 3); ASSERT (ftello (stdin) == 3); ch = ungetc ('~', stdin); ASSERT (ch == '~'); ASSERT (ftell (stdin) == 2); ASSERT (ftello (stdin) == 2); } #if !defined __MINT__ /* FreeMiNT has problems seeking past end of file */ /* Test ftell beyond end of file. */ ASSERT (fseek (stdin, 0, SEEK_END) == 0); ch = ftello (stdin); ASSERT (fseek (stdin, 10, SEEK_END) == 0); ASSERT (ftell (stdin) == ch + 10); ASSERT (ftello (stdin) == ch + 10); #endif return 0; }