tests/freebsd_open_memstream.c

   1 /*-
   2  * Copyright (c) 2013 Hudson River Trading LLC
   3  * Written by: John H. Baldwin <jhb@FreeBSD.org>
   4  * All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  * 1. Redistributions of source code must retain the above copyright
  10  *    notice, this list of conditions and the following disclaimer.
  11  * 2. Redistributions in binary form must reproduce the above copyright
  12  *    notice, this list of conditions and the following disclaimer in the
  13  *    documentation and/or other materials provided with the distribution.
  14  *
  15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  16  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  17  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  18  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  19  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  20  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  21  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  22  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  23  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  24  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  25  * SUCH DAMAGE.
  26  */
  27
  28 #include <sys/cdefs.h>
  29
  30 #include <err.h>
  31 #include <errno.h>
  32 #include <limits.h>
  33 #include <stdint.h>
  34 #include <stdio.h>
  35 #include <stdlib.h>
  36 #include <string.h>
  37 #include <wchar.h>
  38
  39 #include <darwintest.h>
  40
  41 static char *buf;
  42 static size_t len;
  43
  44 static void
  45 assert_stream(const char *contents)
  46 {
  47         T_EXPECT_EQ(strlen(contents), len,
  48                         "bad length %zd for \"%s\"\n", len, contents);
  49     T_EXPECT_EQ(strncmp(buf, contents, strlen(contents)), 0,
  50                         "bad buffer \"%s\" for \"%s\"\n", buf, contents);
  51 }
  52
  53 T_DECL(freebsd_open_memstream_open_group_test, "")
  54 {
  55         FILE *fp;
  56         off_t eob;
  57
  58         fp = open_memstream(&buf, &len);
  59         T_ASSERT_NOTNULL(fp, "open_memstream failed");
  60
  61         fprintf(fp, "hello my world");
  62         fflush(fp);
  63         assert_stream("hello my world");
  64         eob = ftello(fp);
  65         rewind(fp);
  66         fprintf(fp, "good-bye");
  67         fseeko(fp, eob, SEEK_SET);
  68         fclose(fp);
  69         assert_stream("good-bye world");
  70         free(buf);
  71 }
  72
  73 T_DECL(freebsd_open_memstream_simple_tests, "")
  74 {
  75         static const char zerobuf[] =
  76             { 'f', 'o', 'o', 0, 0, 0, 0, 'b', 'a', 'r', 0 };
  77         char c;
  78         FILE *fp;
  79
  80         fp = open_memstream(&buf, NULL);
  81         T_ASSERT_NULL(fp, "open_memstream did not fail");
  82         T_ASSERT_EQ(errno, EINVAL, "open_memstream didn't fail with EINVAL");
  83         fp = open_memstream(NULL, &len);
  84         T_ASSERT_NULL(fp, "open_memstream did not fail");
  85         T_ASSERT_EQ(errno, EINVAL, "open_memstream didn't fail with EINVAL");
  86         fp = open_memstream(&buf, &len);
  87         T_ASSERT_NOTNULL(fp, "open_memstream failed, errno=%d", errno);
  88         fflush(fp);
  89         assert_stream("");
  90         if (fwide(fp, 0) >= 0)
  91                 printf("stream is not byte-oriented\n");
  92
  93         fprintf(fp, "fo");
  94         fflush(fp);
  95         assert_stream("fo");
  96         fputc('o', fp);
  97         fflush(fp);
  98         assert_stream("foo");
  99         rewind(fp);
 100         fflush(fp);
 101         assert_stream("");
 102         fseek(fp, 0, SEEK_END);
 103         fflush(fp);
 104         assert_stream("foo");
 105
 106         /*
 107          * Test seeking out past the current end.  Should zero-fill the
 108          * intermediate area.
 109          */
 110         fseek(fp, 4, SEEK_END);
 111         fprintf(fp, "bar");
 112         fflush(fp);
 113
 114         /*
 115          * Can't use assert_stream() here since this should contain
 116          * embedded null characters.
 117          */
 118         if (len != 10)
 119                 printf("bad length %zd for zero-fill test\n", len);
 120         else if (memcmp(buf, zerobuf, sizeof(zerobuf)) != 0)
 121                 printf("bad buffer for zero-fill test\n");
 122
 123         fseek(fp, 3, SEEK_SET);
 124         fprintf(fp, " in ");
 125         fflush(fp);
 126         assert_stream("foo in ");
 127         fseek(fp, 0, SEEK_END);
 128         fflush(fp);
 129         assert_stream("foo in bar");
 130
 131         rewind(fp);
 132         if (fread(&c, sizeof(c), 1, fp) != 0)
 133                 printf("fread did not fail\n");
 134         else if (!ferror(fp))
 135                 printf("error indicator not set after fread\n");
 136         else
 137                 clearerr(fp);
 138
 139         fseek(fp, 4, SEEK_SET);
 140         fprintf(fp, "bar baz");
 141         fclose(fp);
 142         assert_stream("foo bar baz");
 143         free(buf);
 144 }
 145
 146 T_DECL(freebsd_open_memstream_seek_tests, "")
 147 {
 148         FILE *fp;
 149
 150         fp = open_memstream(&buf, &len);
 151         T_ASSERT_NOTNULL(fp, "open_memstream failed: %d", errno);
 152
 153 #define SEEK_FAIL(offset, whence, error) do {                   \
 154         errno = 0;                                              \
 155         T_ASSERT_NE(fseeko(fp, (offset), (whence)), 0,  \
 156             "fseeko(%s, %s) did not fail, set pos to %jd",      \
 157             __STRING(offset), __STRING(whence), \
 158             (intmax_t)ftello(fp));                              \
 159         T_ASSERT_EQ(errno, (error),                     \
 160             "fseeko(%s, %s) failed with %d rather than %s",     \
 161             __STRING(offset), __STRING(whence), errno,          \
 162             __STRING(error));                                   \
 163 } while (0)
 164
 165 #define SEEK_OK(offset, whence, result) do {                    \
 166         T_ASSERT_EQ(fseeko(fp, (offset), (whence)), 0,  \
 167             "fseeko(%s, %s) failed: %s",                        \
 168             __STRING(offset), __STRING(whence), strerror(errno)); \
 169         T_ASSERT_EQ(ftello(fp), (off_t)(result),                        \
 170             "fseeko(%s, %s) seeked to %jd rather than %s",      \
 171             __STRING(offset), __STRING(whence),                 \
 172             (intmax_t)ftello(fp), __STRING(result));            \
 173 } while (0)
 174
 175         SEEK_FAIL(-1, SEEK_SET, EINVAL);
 176         SEEK_FAIL(-1, SEEK_CUR, EINVAL);
 177         SEEK_FAIL(-1, SEEK_END, EINVAL);
 178         fprintf(fp, "foo");
 179         SEEK_OK(-1, SEEK_CUR, 2);
 180         SEEK_OK(0, SEEK_SET, 0);
 181         SEEK_OK(-1, SEEK_END, 2);
 182         SEEK_OK(OFF_MAX - 1, SEEK_SET, OFF_MAX - 1);
 183         SEEK_FAIL(2, SEEK_CUR, EOVERFLOW);
 184         fclose(fp);
 185 }