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      1 /*
      2  * Copyright 2011 Google Inc.
      3  *
      4  * Use of this source code is governed by a BSD-style license that can be
      5  * found in the LICENSE file.
      6  */
      7 
      8 #include "SkReader32.h"
      9 #include "Test.h"
     10 
     11 static void assert_eof(skiatest::Reporter* reporter, const SkReader32& reader) {
     12     REPORTER_ASSERT(reporter, reader.eof());
     13     REPORTER_ASSERT(reporter, reader.size() == reader.offset());
     14     REPORTER_ASSERT(reporter, (const char*)reader.peek() ==
     15                     (const char*)reader.base() + reader.size());
     16 }
     17 
     18 static void assert_start(skiatest::Reporter* reporter, const SkReader32& reader) {
     19     REPORTER_ASSERT(reporter, 0 == reader.offset());
     20     REPORTER_ASSERT(reporter, reader.size() == reader.available());
     21     REPORTER_ASSERT(reporter, reader.isAvailable(reader.size()));
     22     REPORTER_ASSERT(reporter, !reader.isAvailable(reader.size() + 1));
     23     REPORTER_ASSERT(reporter, reader.peek() == reader.base());
     24 }
     25 
     26 static void assert_empty(skiatest::Reporter* reporter, const SkReader32& reader) {
     27     REPORTER_ASSERT(reporter, 0 == reader.size());
     28     REPORTER_ASSERT(reporter, 0 == reader.offset());
     29     REPORTER_ASSERT(reporter, 0 == reader.available());
     30     REPORTER_ASSERT(reporter, !reader.isAvailable(1));
     31     assert_eof(reporter, reader);
     32     assert_start(reporter, reader);
     33 }
     34 
     35 DEF_TEST(Reader32, reporter) {
     36     SkReader32 reader;
     37     assert_empty(reporter, reader);
     38     REPORTER_ASSERT(reporter, nullptr == reader.base());
     39     REPORTER_ASSERT(reporter, nullptr == reader.peek());
     40 
     41     size_t i;
     42 
     43     const int32_t data[] = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 };
     44     const SkScalar data2[] = { 0, SK_Scalar1, -SK_Scalar1, SK_Scalar1/2 };
     45     const size_t bufsize = sizeof(data) > sizeof(data2) ?
     46       sizeof(data) : sizeof(data2);
     47     char buffer[bufsize];
     48 
     49     reader.setMemory(data, sizeof(data));
     50     for (i = 0; i < SK_ARRAY_COUNT(data); ++i) {
     51         REPORTER_ASSERT(reporter, sizeof(data) == reader.size());
     52         REPORTER_ASSERT(reporter, i*4 == reader.offset());
     53         REPORTER_ASSERT(reporter, (const void*)data == reader.base());
     54         REPORTER_ASSERT(reporter, (const void*)&data[i] == reader.peek());
     55         REPORTER_ASSERT(reporter, data[i] == reader.readInt());
     56     }
     57     assert_eof(reporter, reader);
     58     reader.rewind();
     59     assert_start(reporter, reader);
     60     reader.read(buffer, sizeof(data));
     61     REPORTER_ASSERT(reporter, !memcmp(data, buffer, sizeof(data)));
     62 
     63     reader.setMemory(data2, sizeof(data2));
     64     for (i = 0; i < SK_ARRAY_COUNT(data2); ++i) {
     65         REPORTER_ASSERT(reporter, sizeof(data2) == reader.size());
     66         REPORTER_ASSERT(reporter, i*4 == reader.offset());
     67         REPORTER_ASSERT(reporter, (const void*)data2 == reader.base());
     68         REPORTER_ASSERT(reporter, (const void*)&data2[i] == reader.peek());
     69         REPORTER_ASSERT(reporter, data2[i] == reader.readScalar());
     70     }
     71     assert_eof(reporter, reader);
     72     reader.rewind();
     73     assert_start(reporter, reader);
     74     reader.read(buffer, sizeof(data2));
     75     REPORTER_ASSERT(reporter, !memcmp(data2, buffer, sizeof(data2)));
     76 
     77     reader.setMemory(nullptr, 0);
     78     assert_empty(reporter, reader);
     79     REPORTER_ASSERT(reporter, nullptr == reader.base());
     80     REPORTER_ASSERT(reporter, nullptr == reader.peek());
     81 }
     82