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msvcirt: Correct the behavior of filebuf::setbuf().

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While implementing ifstream::setbuf() it turned out that filebuf::setbuf(),
behaves a bit different on Windows than our implementation.

It seems to reimplement streambuf::setbuf() with a very minor difference - it
doesn't ever set unbuffered to 0 and allows to change the underlying buffer as
long as the file is not opened.

Signed-off-by: Arkadiusz Hiler <ahiler@codeweavers.com>
Signed-off-by: Piotr Caban <piotr@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
This commit is contained in:
Arkadiusz Hiler 2020-09-04 12:42:39 +03:00 committed by Alexandre Julliard
parent 314368e6c4
commit f4bb6abebc
2 changed files with 77 additions and 5 deletions
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22
dlls/msvcirt/msvcirt.c
View file

@ -1175,16 +1175,28 @@ streampos __thiscall filebuf_seekoff(filebuf *this, streamoff offset, ios_seek_d
DEFINE_THISCALL_WRAPPER(filebuf_setbuf, 12)
streambuf* __thiscall filebuf_setbuf(filebuf *this, char *buffer, int length)
{
streambuf *ret;
TRACE("(%p %p %d)\n", this, buffer, length);
if (this->base.base != NULL)
if (filebuf_is_open(this) && this->base.base != NULL)
return NULL;
streambuf_lock(&this->base);
ret = streambuf_setbuf(&this->base, buffer, length);
if (buffer == NULL || !length) {
this->base.unbuffered = 1;
} else {
if (this->base.allocated) {
MSVCRT_operator_delete(this->base.base);
this->base.allocated = 0;
}
this->base.base = buffer;
this->base.ebuf = buffer + length;
}
streambuf_unlock(&this->base);
return ret;
return &this->base;
}
/* ?setmode@filebuf@@QAEHH@Z */

60
dlls/msvcirt/tests/msvcirt.c
View file

@ -1168,16 +1168,22 @@ static void test_streambuf(void)
sb.do_lock = -1;
/* setb */
sb.unbuffered = 1;
call_func4(p_streambuf_setb, &sb, reserve, reserve+16, 0);
ok(sb.unbuffered == 1, "wrong unbuffered value, expected 1 got %d\n", sb.unbuffered);
ok(sb.base == reserve, "wrong base pointer, expected %p got %p\n", reserve, sb.base);
ok(sb.ebuf == reserve+16, "wrong ebuf pointer, expected %p got %p\n", reserve+16, sb.ebuf);
call_func4(p_streambuf_setb, &sb, reserve, reserve+16, 4);
ok(sb.unbuffered == 1, "wrong unbuffered value, expected 1 got %d\n", sb.unbuffered);
ok(sb.allocated == 4, "wrong allocate value, expected 4 got %d\n", sb.allocated);
sb.allocated = 0;
sb.unbuffered = 0;
call_func4(p_streambuf_setb, &sb, NULL, NULL, 3);
ok(sb.unbuffered == 0, "wrong unbuffered value, expected 0 got %d\n", sb.unbuffered);
ok(sb.allocated == 3, "wrong allocate value, expected 3 got %d\n", sb.allocated);
/* setbuf */
sb.unbuffered = 0;
psb = call_func3(p_streambuf_setbuf, &sb, NULL, 5);
ok(psb == &sb, "wrong return value, expected %p got %p\n", &sb, psb);
ok(sb.allocated == 3, "wrong allocate value, expected 3 got %d\n", sb.allocated);
@ -1659,21 +1665,75 @@ static void test_filebuf(void)
/* setbuf */
fb1.base.do_lock = 0;
fb1.fd = -1; /* closed */
ok(fb1.base.allocated == 0, "wrong allocate value, expected 0 got %d\n", fb1.base.allocated);
ok(fb1.base.unbuffered == 0, "wrong unbuffered value, expected 0 got %d\n", fb1.base.unbuffered);
ok(fb1.fd == -1, "wrong fd, expected -1 got %d\n", fb1.fd);
fb1.base.unbuffered = 1;
pret = (filebuf*) call_func3(p_filebuf_setbuf, &fb1, read_buffer, 16);
ok(pret == &fb1, "wrong return, expected %p got %p\n", &fb1, pret);
ok(fb1.base.allocated == 0, "wrong allocate value, expected 0 got %d\n", fb1.base.allocated);
ok(fb1.base.unbuffered == 1, "wrong unbuffered value, expected 1 got %d\n", fb1.base.unbuffered);
ok(fb1.base.base == read_buffer, "wrong buffer, expected %p got %p\n", read_buffer, fb1.base.base);
ok(fb1.base.pbase == NULL, "wrong put area, expected %p got %p\n", NULL, fb1.base.pbase);
ok(fb1.base.allocated == 0, "wrong allocate value, expected 0 got %d\n", fb1.base.allocated);
pret = (filebuf*) call_func3(p_filebuf_setbuf, &fb1, read_buffer + 8, 8);
ok(pret == &fb1, "wrong return, expected %p got %p\n", NULL, pret);
ok(fb1.base.allocated == 0, "wrong allocate value, expected 0 got %d\n", fb1.base.allocated);
ok(fb1.base.unbuffered == 1, "wrong unbuffered value, expected 1 got %d\n", fb1.base.unbuffered);
ok(fb1.base.base == read_buffer + 8, "wrong buffer, expected %p got %p\n", read_buffer + 8, fb1.base.base);
ok(fb1.base.pbase == NULL, "wrong put area, expected %p got %p\n", NULL, fb1.base.pbase);
fb1.base.unbuffered = 0;
pret = (filebuf*) call_func3(p_filebuf_setbuf, &fb1, NULL, 0);
ok(fb1.base.allocated == 0, "wrong allocate value, expected 0 got %d\n", fb1.base.allocated);
ok(fb1.base.unbuffered == 1, "wrong unbuffered value, expected 1 got %d\n", fb1.base.unbuffered);
ok(fb1.base.base == read_buffer + 8, "wrong buffer, expected %p got %p\n", read_buffer + 8, fb1.base.base);
ok(fb1.base.pbase == NULL, "wrong put area, expected %p got %p\n", NULL, fb1.base.pbase);
ok((int) call_func1(p_streambuf_doallocate, &fb1.base) == 1, "failed to allocate buffer\n");
ok(fb1.base.allocated == 1, "wrong allocate value, expected 1 got %d\n", fb1.base.allocated);
ok(fb1.base.unbuffered == 1, "wrong unbuffered value, expected 1 got %d\n", fb1.base.unbuffered);
ok(fb1.base.base != NULL, "wrong buffer, expected not NULL got %p\n", fb1.base.base);
pret = (filebuf*) call_func3(p_filebuf_setbuf, &fb1, read_buffer + 2, 14);
ok(pret == &fb1, "wrong return, expected %p got %p\n", &fb1, pret);
ok(fb1.base.allocated == 0, "wrong allocate value, expected 0 got %d\n", fb1.base.allocated);
ok(fb1.base.unbuffered == 1, "wrong unbuffered value, expected 1 got %d\n", fb1.base.unbuffered);
ok(fb1.base.base == read_buffer + 2, "wrong buffer, expected %p got %p\n", read_buffer + 2, fb1.base.base);
ok(fb1.base.pbase == NULL, "wrong put area, expected %p got %p\n", NULL, fb1.base.pbase);
ok(fb1.base.allocated == 0, "wrong allocate value, expected 0 got %d\n", fb1.base.allocated);
fb1.fd = 1; /* opened */
fb1.base.unbuffered = 1;
fb1.base.base = fb1.base.ebuf = NULL;
pret = (filebuf*) call_func3(p_filebuf_setbuf, &fb1, read_buffer, 16);
ok(pret == &fb1, "wrong return, expected %p got %p\n", &fb1, pret);
ok(fb1.base.allocated == 0, "wrong allocate value, expected 0 got %d\n", fb1.base.allocated);
ok(fb1.base.unbuffered == 1, "wrong unbuffered value, expected 1 got %d\n", fb1.base.unbuffered);
ok(fb1.base.base == read_buffer, "wrong buffer, expected %p got %p\n", read_buffer, fb1.base.base);
ok(fb1.base.pbase == NULL, "wrong put area, expected %p got %p\n", NULL, fb1.base.pbase);
pret = (filebuf*) call_func3(p_filebuf_setbuf, &fb1, read_buffer + 8, 8);
ok(pret == NULL, "wrong return, expected %p got %p\n", NULL, pret);
ok(fb1.base.allocated == 0, "wrong allocate value, expected 0 got %d\n", fb1.base.allocated);
ok(fb1.base.unbuffered == 1, "wrong unbuffered value, expected 1 got %d\n", fb1.base.unbuffered);
ok(fb1.base.base == read_buffer, "wrong buffer, expected %p got %p\n", read_buffer, fb1.base.base);
ok(fb1.base.pbase == NULL, "wrong put area, expected %p got %p\n", NULL, fb1.base.pbase);
fb1.base.unbuffered = 0;
pret = (filebuf*) call_func3(p_filebuf_setbuf, &fb1, NULL, 0);
ok(fb1.base.allocated == 0, "wrong allocate value, expected 0 got %d\n", fb1.base.allocated);
ok(fb1.base.unbuffered == 0, "wrong unbuffered value, expected 0 got %d\n", fb1.base.unbuffered);
ok(fb1.base.base == read_buffer, "wrong buffer, expected %p got %p\n", read_buffer, fb1.base.base);
ok(fb1.base.pbase == NULL, "wrong put area, expected %p got %p\n", NULL, fb1.base.pbase);
fb1.base.unbuffered = 1;
fb1.base.pbase = fb1.base.pptr = fb1.base.base;
fb1.base.epptr = fb1.base.ebuf;
fb1.base.do_lock = -1;
pret = (filebuf*) call_func3(p_filebuf_setbuf, &fb1, read_buffer, 16);
ok(pret == NULL, "wrong return, expected %p got %p\n", NULL, pret);
ok(fb1.base.allocated == 0, "wrong allocate value, expected 0 got %d\n", fb1.base.allocated);
ok(fb1.base.unbuffered == 1, "wrong unbuffered value, expected 1 got %d\n", fb1.base.unbuffered);
ok(fb1.base.base == read_buffer, "wrong buffer, expected %p got %p\n", read_buffer, fb1.base.base);
ok(fb1.base.pbase == read_buffer, "wrong put area, expected %p got %p\n", read_buffer, fb1.base.pbase);
fb1.base.base = fb1.base.ebuf = NULL;
fb1.base.do_lock = 0;
fb1.base.unbuffered = 0;
pret = (filebuf*) call_func3(p_filebuf_setbuf, &fb1, read_buffer, 0);
ok(pret == &fb1, "wrong return, expected %p got %p\n", &fb1, pret);
ok(fb1.base.allocated == 0, "wrong allocate value, expected 0 got %d\n", fb1.base.allocated);