libc/test/UnitTest/ScanfMatcher.cpp

   1 //===-- ScanfMatcher.cpp ----------------------------------------*- C++ -*-===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 #include "ScanfMatcher.h"
  10
  11 #include "src/__support/FPUtil/FPBits.h"
  12 #include "src/stdio/scanf_core/core_structs.h"
  13
  14 #include "test/UnitTest/StringUtils.h"
  15 #include "test/UnitTest/Test.h"
  16
  17 #include <stdint.h>
  18
  19 namespace LIBC_NAMESPACE {
  20 namespace testing {
  21
  22 using scanf_core::FormatFlags;
  23 using scanf_core::FormatSection;
  24 using scanf_core::LengthModifier;
  25
  26 bool FormatSectionMatcher::match(FormatSection actualValue) {
  27   actual = actualValue;
  28   return expected == actual;
  29 }
  30
  31 namespace {
  32
  33 #define IF_FLAG_SHOW_FLAG(flag_name)                                           \
  34   do {                                                                         \
  35     if ((form.flags & FormatFlags::flag_name) == FormatFlags::flag_name)       \
  36       tlog << "\n\t\t" << #flag_name;                                          \
  37   } while (false)
  38 #define CASE_LM(lm)                                                            \
  39   case (LengthModifier::lm):                                                   \
  40     tlog << #lm;                                                               \
  41     break
  42
  43 void display(FormatSection form) {
  44   tlog << "Raw String (len " << form.raw_string.size() << "): \"";
  45   for (size_t i = 0; i < form.raw_string.size(); ++i) {
  46     tlog << form.raw_string[i];
  47   }
  48   tlog << "\"";
  49   if (form.has_conv) {
  50     tlog << "\n\tHas Conv\n\tFlags:";
  51     IF_FLAG_SHOW_FLAG(NO_WRITE);
  52     IF_FLAG_SHOW_FLAG(ALLOCATE);
  53     tlog << "\n";
  54     tlog << "\tmax width: " << form.max_width << "\n";
  55     tlog << "\tlength modifier: ";
  56     switch (form.length_modifier) {
  57       CASE_LM(NONE);
  58       CASE_LM(l);
  59       CASE_LM(ll);
  60       CASE_LM(h);
  61       CASE_LM(hh);
  62       CASE_LM(j);
  63       CASE_LM(z);
  64       CASE_LM(t);
  65       CASE_LM(L);
  66     }
  67     tlog << "\n";
  68     // If the pointer is used (NO_WRITE is not set and the conversion isn't %).
  69     if (((form.flags & FormatFlags::NO_WRITE) == 0) &&
  70         (form.conv_name != '%')) {
  71       tlog << "\tpointer value: "
  72            << int_to_hex<uintptr_t>(
  73                   reinterpret_cast<uintptr_t>(form.output_ptr))
  74            << "\n";
  75     }
  76
  77     tlog << "\tconversion name: " << form.conv_name << "\n";
  78
  79     if (form.conv_name == '[') {
  80       tlog << "\t\t";
  81       for (size_t i = 0; i < 256 /* char max */; ++i) {
  82         if (form.scan_set.test(i)) {
  83           tlog << static_cast<char>(i);
  84         }
  85       }
  86       tlog << "\n\t]\n";
  87     }
  88   }
  89 }
  90 } // anonymous namespace
  91
  92 void FormatSectionMatcher::explainError() {
  93   tlog << "expected format section: ";
  94   display(expected);
  95   tlog << '\n';
  96   tlog << "actual format section  : ";
  97   display(actual);
  98   tlog << '\n';
  99 }
 100
 101 } // namespace testing
 102 } // namespace LIBC_NAMESPACE