diff options
Diffstat (limited to 'gnulib/tests/test-fwriting.c')
| m--------- | gnulib | 0 | ||||
| -rw-r--r-- | gnulib/tests/test-fwriting.c | 164 |
2 files changed, 164 insertions, 0 deletions
diff --git a/gnulib b/gnulib deleted file mode 160000 -Subproject 443bc5ffcf7429e557f4a371b0661abe98ddbc1 diff --git a/gnulib/tests/test-fwriting.c b/gnulib/tests/test-fwriting.c new file mode 100644 index 0000000..aa45d55 --- /dev/null +++ b/gnulib/tests/test-fwriting.c @@ -0,0 +1,164 @@ +/* Test of fwriting() function. + Copyright (C) 2007-2011 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 <http://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 we are not using the gnulib fseek module. */ +#define _GL_NO_LARGE_FILES +#include "fwriting.h" + +#include <stdio.h> + +#include "macros.h" + +#define TESTFILE "t-fwriting.tmp" + +int +main () +{ + FILE *fp; + + /* Create a file with some contents. Write-only file is always writing. */ + fp = fopen (TESTFILE, "w"); + if (fp == NULL) + goto skip; + ASSERT (fwriting (fp)); + if (fwrite ("foobarsh", 1, 8, fp) < 8) + goto skip; + ASSERT (fwriting (fp)); + if (fclose (fp)) + goto skip; + + /* Open it in read-only mode. Read-only file is never writing. */ + fp = fopen (TESTFILE, "r"); + if (fp == NULL) + goto skip; + ASSERT (!fwriting (fp)); + if (fgetc (fp) != 'f') + goto skip; + ASSERT (!fwriting (fp)); + if (fseek (fp, 2, SEEK_CUR)) + goto skip; + ASSERT (!fwriting (fp)); + if (fgetc (fp) != 'b') + goto skip; + ASSERT (!fwriting (fp)); + fflush (fp); + ASSERT (!fwriting (fp)); + if (fgetc (fp) != 'a') + goto skip; + ASSERT (!fwriting (fp)); + if (fseek (fp, 0, SEEK_END)) + goto skip; + ASSERT (!fwriting (fp)); + if (fclose (fp)) + goto skip; + + /* Open it in read-write mode. POSIX requires a reposition (fseek, + fsetpos, rewind) or fflush when transitioning from write to read, + fwriting is only deterministic after input or output, but this + test case should be portable even on open, after reposition, and + after fflush. */ + /* First a scenario with only fgetc, fseek, fputc. */ + fp = fopen (TESTFILE, "r+"); + if (fp == NULL) + goto skip; + ASSERT (!fwriting (fp)); + if (fgetc (fp) != 'f') + goto skip; + ASSERT (!fwriting (fp)); + if (fseek (fp, 2, SEEK_CUR)) + goto skip; + ASSERT (!fwriting (fp)); + if (fgetc (fp) != 'b') + goto skip; + ASSERT (!fwriting (fp)); + /* This fseek call is necessary when switching from reading to writing. + See the description of fopen(), ISO C 99 7.19.5.3.(6). */ + if (fseek (fp, 0, SEEK_CUR) != 0) + goto skip; + ASSERT (!fwriting (fp)); + if (fputc ('x', fp) != 'x') + goto skip; + ASSERT (fwriting (fp)); + if (fseek (fp, 0, SEEK_END)) + goto skip; + /* freading (fp) is undefined here, because on some implementations (e.g. + glibc) fseek causes a buffer to be read. + fwriting (fp) is undefined as well. */ + if (fclose (fp)) + goto skip; + + /* Open it in read-write mode. POSIX requires a reposition (fseek, + fsetpos, rewind) or fflush when transitioning from write to read, + fwriting is only deterministic after input or output, but this + test case should be portable even on open, after reposition, and + after fflush. */ + /* Here a scenario that includes fflush. */ + fp = fopen (TESTFILE, "r+"); + if (fp == NULL) + goto skip; + ASSERT (!fwriting (fp)); + if (fgetc (fp) != 'f') + goto skip; + ASSERT (!fwriting (fp)); + if (fseek (fp, 2, SEEK_CUR)) + goto skip; + ASSERT (!fwriting (fp)); + if (fgetc (fp) != 'b') + goto skip; + ASSERT (!fwriting (fp)); + fflush (fp); + ASSERT (!fwriting (fp)); + if (fgetc (fp) != 'x') + goto skip; + ASSERT (!fwriting (fp)); + /* This fseek call is necessary when switching from reading to writing. + See the description of fopen(), ISO C 99 7.19.5.3.(6). */ + if (fseek (fp, 0, SEEK_CUR) != 0) + goto skip; + ASSERT (!fwriting (fp)); + if (fputc ('z', fp) != 'z') + goto skip; + ASSERT (fwriting (fp)); + if (fseek (fp, 0, SEEK_END)) + goto skip; + /* freading (fp) is undefined here, because on some implementations (e.g. + glibc) fseek causes a buffer to be read. + fwriting (fp) is undefined as well. */ + if (fclose (fp)) + goto skip; + + /* Open it in append mode. */ + fp = fopen (TESTFILE, "a"); + if (fp == NULL) + goto skip; + ASSERT (fwriting (fp)); + if (fwrite ("bla", 1, 3, fp) < 3) + goto skip; + ASSERT (fwriting (fp)); + if (fclose (fp)) + goto skip; + + return 0; + + skip: + fprintf (stderr, "Skipping test: file operations failed.\n"); + return 77; +} |