[4/4] msvcrt: Implement bufsiz block flushing behavior.

[Grazvydas Ignotas]

---
 dlls/msvcrt/file.c       |   15 +++++++++++++++
 dlls/msvcrt/tests/file.c |    2 +-
 2 files changed, 16 insertions(+), 1 deletion(-)

diff --git a/dlls/msvcrt/file.c b/dlls/msvcrt/file.c
index 7dee5d6..00f214d 100644
--- a/dlls/msvcrt/file.c
+++ b/dlls/msvcrt/file.c
@@ -3720,6 +3720,21 @@ MSVCRT_size_t CDECL MSVCRT_fwrite(const void *ptr, MSVCRT_size_t size, MSVCRT_si
             }
             written += wrcnt;
             wrcnt = 0;
+        } else if(file->_bufsiz && wrcnt >= file->_bufsiz) {
+            int pcnt=(wrcnt / file->_bufsiz) * file->_bufsiz;
+            if(msvcrt_set_write_direction(file) != 0)
+                break;
+
+            if(msvcrt_flush_buffer(file) == MSVCRT_EOF)
+                break;
+
+            if(MSVCRT__write(file->_file, ptr, pcnt) <= 0) {
+                file->_flag |= MSVCRT__IOERR;
+                break;
+            }
+            written += pcnt;
+            wrcnt -= pcnt;
+            ptr = (const char*)ptr + pcnt;
         } else {
             if(MSVCRT__flsbuf(*(const char*)ptr, file) == MSVCRT_EOF)
                 break;
diff --git a/dlls/msvcrt/tests/file.c b/dlls/msvcrt/tests/file.c
index 1ca9efb..2de07fc 100644
--- a/dlls/msvcrt/tests/file.c
+++ b/dlls/msvcrt/tests/file.c
@@ -2246,7 +2246,7 @@ static void test_write_flush_size(FILE *file, size_t size)
     fflush(file);
     fseek(file, 0, SEEK_SET);
     ok(fread(inbuffer, 1, size, file) == size, "read failed\n");
-    todo_wine ok(memcmp(outbuffer, inbuffer, size) == 0, "missing flush by %d byte write\n", size);
+    ok(memcmp(outbuffer, inbuffer, size) == 0, "missing flush by %d byte write\n", size);
     rewind(file);
     fwrite(outbuffer, 1, size - 1, file);
     lseek(fd, 1, SEEK_SET);
-- 
1.7.9.5