freebsd_open_memstream.c [plain text]
#include <sys/cdefs.h>
#include <err.h>
#include <errno.h>
#include <limits.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <wchar.h>
#include <darwintest.h>
static char *buf;
static size_t len;
static void
assert_stream(const char *contents)
{
T_EXPECT_EQ(strlen(contents), len,
"bad length %zd for \"%s\"\n", len, contents);
T_EXPECT_EQ(strncmp(buf, contents, strlen(contents)), 0,
"bad buffer \"%s\" for \"%s\"\n", buf, contents);
}
T_DECL(freebsd_open_memstream_open_group_test, "")
{
FILE *fp;
off_t eob;
fp = open_memstream(&buf, &len);
T_ASSERT_NOTNULL(fp, "open_memstream failed");
fprintf(fp, "hello my world");
fflush(fp);
assert_stream("hello my world");
eob = ftello(fp);
rewind(fp);
fprintf(fp, "good-bye");
fseeko(fp, eob, SEEK_SET);
fclose(fp);
assert_stream("good-bye world");
free(buf);
}
T_DECL(freebsd_open_memstream_simple_tests, "")
{
static const char zerobuf[] =
{ 'f', 'o', 'o', 0, 0, 0, 0, 'b', 'a', 'r', 0 };
char c;
FILE *fp;
fp = open_memstream(&buf, NULL);
T_ASSERT_NULL(fp, "open_memstream did not fail");
T_ASSERT_EQ(errno, EINVAL, "open_memstream didn't fail with EINVAL");
fp = open_memstream(NULL, &len);
T_ASSERT_NULL(fp, "open_memstream did not fail");
T_ASSERT_EQ(errno, EINVAL, "open_memstream didn't fail with EINVAL");
fp = open_memstream(&buf, &len);
T_ASSERT_NOTNULL(fp, "open_memstream failed, errno=%d", errno);
fflush(fp);
assert_stream("");
if (fwide(fp, 0) >= 0)
printf("stream is not byte-oriented\n");
fprintf(fp, "fo");
fflush(fp);
assert_stream("fo");
fputc('o', fp);
fflush(fp);
assert_stream("foo");
rewind(fp);
fflush(fp);
assert_stream("");
fseek(fp, 0, SEEK_END);
fflush(fp);
assert_stream("foo");
fseek(fp, 4, SEEK_END);
fprintf(fp, "bar");
fflush(fp);
if (len != 10)
printf("bad length %zd for zero-fill test\n", len);
else if (memcmp(buf, zerobuf, sizeof(zerobuf)) != 0)
printf("bad buffer for zero-fill test\n");
fseek(fp, 3, SEEK_SET);
fprintf(fp, " in ");
fflush(fp);
assert_stream("foo in ");
fseek(fp, 0, SEEK_END);
fflush(fp);
assert_stream("foo in bar");
rewind(fp);
if (fread(&c, sizeof(c), 1, fp) != 0)
printf("fread did not fail\n");
else if (!ferror(fp))
printf("error indicator not set after fread\n");
else
clearerr(fp);
fseek(fp, 4, SEEK_SET);
fprintf(fp, "bar baz");
fclose(fp);
assert_stream("foo bar baz");
free(buf);
}
T_DECL(freebsd_open_memstream_seek_tests, "")
{
FILE *fp;
fp = open_memstream(&buf, &len);
T_ASSERT_NOTNULL(fp, "open_memstream failed: %d", errno);
#define SEEK_FAIL(offset, whence, error) do { \
errno = 0; \
T_ASSERT_NE(fseeko(fp, (offset), (whence)), 0, \
"fseeko(%s, %s) did not fail, set pos to %jd", \
__STRING(offset), __STRING(whence), \
(intmax_t)ftello(fp)); \
T_ASSERT_EQ(errno, (error), \
"fseeko(%s, %s) failed with %d rather than %s", \
__STRING(offset), __STRING(whence), errno, \
__STRING(error)); \
} while (0)
#define SEEK_OK(offset, whence, result) do { \
T_ASSERT_EQ(fseeko(fp, (offset), (whence)), 0, \
"fseeko(%s, %s) failed: %s", \
__STRING(offset), __STRING(whence), strerror(errno)); \
T_ASSERT_EQ(ftello(fp), (off_t)(result), \
"fseeko(%s, %s) seeked to %jd rather than %s", \
__STRING(offset), __STRING(whence), \
(intmax_t)ftello(fp), __STRING(result)); \
} while (0)
SEEK_FAIL(-1, SEEK_SET, EINVAL);
SEEK_FAIL(-1, SEEK_CUR, EINVAL);
SEEK_FAIL(-1, SEEK_END, EINVAL);
fprintf(fp, "foo");
SEEK_OK(-1, SEEK_CUR, 2);
SEEK_OK(0, SEEK_SET, 0);
SEEK_OK(-1, SEEK_END, 2);
SEEK_OK(OFF_MAX - 1, SEEK_SET, OFF_MAX - 1);
SEEK_FAIL(2, SEEK_CUR, EOVERFLOW);
fclose(fp);
}