kernel32/tests: Add UTF-7 stray + sign removal tests.

dlls/kernel32/tests/codepage.c

@@ -527,6 +527,73 @@ static void test_utf7_encoding(void)
     }
 }
 
+static void test_utf7_decoding(void)
+{
+    char input[32];
+    WCHAR output[32], expected[32];
+    int i, len, expected_len;
+
+    static const signed char base64_decoding_table[] =
+    {
+        -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 0x00-0x0F */
+        -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 0x10-0x1F */
+        -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 62, -1, -1, -1, 63, /* 0x20-0x2F */
+        52, 53, 54, 55, 56, 57, 58, 59, 60, 61, -1, -1, -1, -1, -1, -1, /* 0x30-0x3F */
+        -1,  0,  1,  2,  3,  4,  5,  6,  7,  8,  9, 10, 11, 12, 13, 14, /* 0x40-0x4F */
+        15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, -1, -1, -1, -1, -1, /* 0x50-0x5F */
+        -1, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, /* 0x60-0x6F */
+        41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, -1, -1, -1, -1, -1  /* 0x70-0x7F */
+    };
+
+    if (MultiByteToWideChar(CP_UTF7, 0, "foobar", -1, NULL, 0) == 0 &&
+        GetLastError() == ERROR_CALL_NOT_IMPLEMENTED)
+    {
+        skip("UTF-7 decoding not implemented\n");
+        return;
+    }
+
+    /* test which one-byte characters remove stray + signs */
+    for (i = 0; i < 256; i++)
+    {
+        sprintf(input, "+%c+AAA", i);
+
+        memset(output, 0x23, sizeof(output) - sizeof(WCHAR));
+        output[sizeof(output) / sizeof(WCHAR) - 1] = 0;
+
+        len = MultiByteToWideChar(CP_UTF7, 0, input, 7, output, sizeof(output) / sizeof(WCHAR) - 1);
+
+        if (i == '-')
+        {
+            /* removes the - sign */
+            expected_len = 3;
+            expected[0] = 0x002B;
+            expected[1] = 0;
+            expected[2] = 0;
+        }
+        else if (i <= 0x7F && base64_decoding_table[i] != -1)
+        {
+            /* absorbs the character into the base64 sequence */
+            expected_len = 2;
+            expected[0] = (base64_decoding_table[i] << 10) | 0x03E0;
+            expected[1] = 0;
+        }
+        else
+        {
+            /* removes the + sign */
+            expected_len = 3;
+            expected[0] = i;
+            expected[1] = 0;
+            expected[2] = 0;
+        }
+        expected[expected_len] = 0x2323;
+
+        ok(len == expected_len, "i=0x%02x: expected len=%i, got len=%i\n", i, expected_len, len);
+        ok(memcmp(output, expected, (expected_len + 1) * sizeof(WCHAR)) == 0,
+           "i=0x%02x: expected output=%s, got output=%s\n",
+           i, wine_dbgstr_wn(expected, expected_len + 1), wine_dbgstr_wn(output, expected_len + 1));
+    }
+}
+
 static void test_undefined_byte_char(void)
 {
     static const struct tag_testset {
@@ -734,6 +801,7 @@ START_TEST(codepage)
     test_string_conversion(&bUsedDefaultChar);
 
     test_utf7_encoding();
+    test_utf7_decoding();
 
     test_undefined_byte_char();
     test_threadcp();