winmm/tests: Add EOF and buffer pointer tests for mmio.

dlls/winmm/tests/mmio.c

@@ -787,6 +787,110 @@ static void test_mmioSeek(void)
     DeleteFileA(test_file);
 }
 
+static void test_mmio_end_of_file(void)
+{
+    char test_file[MAX_PATH], buffer[128], data[16];
+    MMIOINFO mmio;
+    HMMIO hmmio;
+    LONG ret;
+    MMRESULT res;
+
+    if (!create_test_file(test_file)) return;
+
+    memset(&mmio, 0, sizeof(mmio));
+    mmio.fccIOProc = FOURCC_DOS;
+    mmio.pchBuffer = buffer;
+    mmio.cchBuffer = sizeof(buffer);
+    hmmio = mmioOpen(test_file, &mmio, MMIO_READ);
+    ok(hmmio != NULL, "mmioOpen error %u\n", mmio.wErrorRet);
+    if (hmmio == NULL) {
+        DeleteFileA(test_file);
+        return;
+    }
+
+    ret = mmioSeek(hmmio, 0, SEEK_END);
+    ok(sizeof(RIFF_buf) == ret, "got %d\n", ret);
+
+    ret = mmioRead(hmmio, data, sizeof(data));
+    todo_wine ok(ret == 0, "expected %d, got %d\n", 0, ret);
+
+    res = mmioGetInfo(hmmio, &mmio, 0);
+    ok(res == MMSYSERR_NOERROR, "expected 0, got %d\n", res);
+
+    res = mmioAdvance(hmmio, &mmio, MMIO_READ);
+    ok(res == MMSYSERR_NOERROR, "expected 0, got %d\n", res);
+    todo_wine ok(mmio.pchNext == mmio.pchEndRead, "expected %p, got %p\n", mmio.pchEndRead, mmio.pchNext);
+
+    mmioClose(hmmio, 0);
+    DeleteFileA(test_file);
+}
+
+static void test_mmio_buffer_pointer(void)
+{
+    char test_file[MAX_PATH];
+    char buffer[5], data[16];
+    MMIOINFO mmio;
+    HMMIO hmmio;
+    LONG size, pos;
+    MMRESULT res;
+
+    if (!create_test_file(test_file)) return;
+
+    memset(&mmio, 0, sizeof(mmio));
+    mmio.fccIOProc = FOURCC_DOS;
+    mmio.pchBuffer = buffer;
+    mmio.cchBuffer = sizeof(buffer);
+    hmmio = mmioOpen(test_file, &mmio, MMIO_READ);
+    ok(hmmio != NULL, "mmioOpen error %u\n", mmio.wErrorRet);
+    if (hmmio == NULL) {
+        DeleteFileA(test_file);
+        return;
+    }
+
+    /* the buffer is empty */
+    size = mmioRead(hmmio, data, 0);
+    ok(size == 0, "expected 0, got %d\n", size);
+    res = mmioGetInfo(hmmio, &mmio, 0);
+    ok(res == MMSYSERR_NOERROR, "expected 0, got %d\n", res);
+    ok(mmio.pchEndRead == mmio.pchBuffer, "expected %p, got %p\n", mmio.pchBuffer, mmio.pchEndRead);
+
+    /* fill the buffer */
+    size = mmioAdvance(hmmio, &mmio, MMIO_READ);
+    ok(mmio.pchEndRead-mmio.pchBuffer == sizeof(buffer), "got %d\n", (int)(mmio.pchEndRead-mmio.pchBuffer));
+
+    /* seeking to the same buffer chunk, the buffer is kept */
+    size = sizeof(buffer)/2;
+    pos = mmioSeek(hmmio, size, SEEK_SET);
+    ok(pos == size, "failed to seek, expected %d, got %d\n", size, pos);
+    res = mmioGetInfo(hmmio, &mmio, 0);
+    ok(res == MMSYSERR_NOERROR, "expected 0, got %d\n", res);
+    ok(mmio.lBufOffset == 0, "expected 0, got %d\n", mmio.lBufOffset);
+    ok(mmio.pchNext-mmio.pchBuffer == size, "expected %d, got %d\n", size, (int)(mmio.pchNext-mmio.pchBuffer));
+    ok(mmio.pchEndRead-mmio.pchBuffer == sizeof(buffer), "got %d\n", (int)(mmio.pchEndRead-mmio.pchBuffer));
+
+    /* seeking to another buffer chunk, the buffer is empty */
+    size = sizeof(buffer) * 3 + sizeof(buffer) / 2;
+    pos = mmioSeek(hmmio, size, SEEK_SET);
+    ok(pos == size, "failed to seek, got %d\n", pos);
+    res = mmioGetInfo(hmmio, &mmio, 0);
+    ok(res == MMSYSERR_NOERROR, "expected 0, got %d\n", res);
+    todo_wine ok(mmio.lBufOffset == size, "expected %d, got %d\n", size, mmio.lBufOffset);
+    todo_wine ok(mmio.pchNext == mmio.pchBuffer, "expected %p, got %p\n", mmio.pchBuffer, mmio.pchNext);
+    todo_wine ok(mmio.pchEndRead == mmio.pchBuffer, "expected %p, got %p\n", mmio.pchBuffer, mmio.pchEndRead);
+
+    /* reading a lot (as sizeof(data) > mmio.cchBuffer), the buffer is empty */
+    size = mmioRead(hmmio, data, sizeof(data));
+    ok(size == sizeof(data), "failed to read, got %d\n", size);
+    res = mmioGetInfo(hmmio, &mmio, 0);
+    ok(res == MMSYSERR_NOERROR, "expected 0, got %d\n", res);
+    todo_wine ok(mmio.lBufOffset == pos+size, "expected %d, got %d\n", pos+size, mmio.lBufOffset);
+    todo_wine ok(mmio.pchNext == mmio.pchBuffer, "expected %p, got %p\n", mmio.pchBuffer, mmio.pchNext);
+    todo_wine ok(mmio.pchEndRead == mmio.pchBuffer, "expected %p, got %p\n", mmio.pchBuffer, mmio.pchEndRead);
+
+    mmioClose(hmmio, 0);
+    DeleteFileA(test_file);
+}
+
 START_TEST(mmio)
 {
     /* Make it possible to run the tests against a specific AVI file in
@@ -803,4 +907,6 @@ START_TEST(mmio)
     test_mmioSetBuffer(fname);
     test_mmioOpen_fourcc();
     test_mmioSeek();
+    test_mmio_end_of_file();
+    test_mmio_buffer_pointer();
 }