tests/auto/cplusplus/preprocessor/tst_preprocessor.cpp

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  32
  33 #include <QtTest>
  34 #include <pp.h>
  35
  36 //TESTED_COMPONENT=src/libs/cplusplus
  37 using namespace CPlusPlus;
  38
  39 class tst_Preprocessor: public QObject
  40 {
  41 Q_OBJECT
  42
  43 private Q_SLOTS:
  44     void unfinished_function_like_macro_call();
  45     void nasty_macro_expansion();
  46 };
  47
  48 void tst_Preprocessor::unfinished_function_like_macro_call()
  49 {
  50     Client *client = 0; // no client.
  51     Environment env;
  52
  53     Preprocessor preprocess(client, &env);
  54     QByteArray preprocessed = preprocess(QLatin1String("<stdin>"),
  55                                          QByteArray("\n#define foo(a,b) a + b"
  56                                          "\nfoo(1, 2\n"));
  57
  58     QCOMPARE(preprocessed.trimmed(), QByteArray("foo"));
  59 }
  60
  61 void tst_Preprocessor::nasty_macro_expansion()
  62 {
  63     QByteArray input("\n"
  64                      "#define BUILD_BUG_ON(condition) ((void)sizeof(char[1 - 2*!!(condition)]))\n"
  65                      "#define is_power_of_two(x)      ( !((x) & ((x)-1)) )\n"
  66                      "#define low_bit_mask(x)         ( ((x)-1) & ~(x) )\n"
  67                      "#define is_valid_mask(x)        is_power_of_two(1LU + (x) + low_bit_mask(x))\n"
  68                      "#define compile_ffs2(__x) \\\n"
  69                      "        __builtin_choose_expr(((__x) & 0x1), 0, 1)\n"
  70                      "#define compile_ffs4(__x) \\\n"
  71                      "        __builtin_choose_expr(((__x) & 0x3), \\\n"
  72                      "                              (compile_ffs2((__x))), \\\n"
  73                      "                              (compile_ffs2((__x) >> 2) + 2))\n"
  74                      "#define compile_ffs8(__x) \\\n"
  75                      "        __builtin_choose_expr(((__x) & 0xf), \\\n"
  76                      "                              (compile_ffs4((__x))), \\\n"
  77                      "                              (compile_ffs4((__x) >> 4) + 4))\n"
  78                      "#define compile_ffs16(__x) \\\n"
  79                      "        __builtin_choose_expr(((__x) & 0xff), \\\n"
  80                      "                              (compile_ffs8((__x))), \\\n"
  81                      "                              (compile_ffs8((__x) >> 8) + 8))\n"
  82                      "#define compile_ffs32(__x) \\\n"
  83                      "        __builtin_choose_expr(((__x) & 0xffff), \\\n"
  84                      "                              (compile_ffs16((__x))), \\\n"
  85                      "                              (compile_ffs16((__x) >> 16) + 16))\n"
  86                      "#define FIELD_CHECK(__mask, __type)                     \\\n"
  87                      "        BUILD_BUG_ON(!(__mask) ||                       \\\n"
  88                      "                     !is_valid_mask(__mask) ||          \\\n"
  89                      "                     (__mask) != (__type)(__mask))      \\\n"
  90                      "\n"
  91                      "#define FIELD32(__mask)                         \\\n"
  92                      "({                                              \\\n"
  93                      "        FIELD_CHECK(__mask, u32);               \\\n"
  94                      "        (struct rt2x00_field32) {               \\\n"
  95                      "                compile_ffs32(__mask), (__mask) \\\n"
  96                      "        };                                      \\\n"
  97                      "})\n"
  98                      "#define BBPCSR                          0x00f0\n"
  99                      "#define BBPCSR_BUSY                     FIELD32(0x00008000)\n"
 100                      "#define WAIT_FOR_BBP(__dev, __reg)  \\\n"
 101                      "        rt2x00pci_regbusy_read((__dev), BBPCSR, BBPCSR_BUSY, (__reg))\n"
 102                      "if (WAIT_FOR_BBP(rt2x00dev, &reg)) {}\n"
 103                      );
 104
 105     Client *client = 0; // no client.
 106     Environment env;
 107
 108     Preprocessor preprocess(client, &env);
 109     QByteArray preprocessed = preprocess(QLatin1String("<stdin>"), input);
 110
 111     QVERIFY(!preprocessed.contains("FIELD32"));
 112 }
 113
 114 QTEST_APPLESS_MAIN(tst_Preprocessor)
 115 #include "tst_preprocessor.moc"