// Copyright 2022 The Abseil Authors.

//

// Licensed under the Apache License, Version 2.0 (the "License");

// you may not use this file except in compliance with the License.

// You may obtain a copy of the License at

//

//      https://www.apache.org/licenses/LICENSE-2.0

//

// Unless required by applicable law or agreed to in writing, software

// distributed under the License is distributed on an "AS IS" BASIS,

// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

// See the License for the specific language governing permissions and

// limitations under the License.

#include "absl/log/internal/check_op.h"

#include <cstring>

#include <ostream>

#include <string>

#include <utility>

#include "absl/base/config.h"

#include "absl/base/nullability.h"

#include "absl/debugging/leak_check.h"

#include "absl/strings/str_cat.h"

#include "absl/strings/string_view.h"

#ifdef _MSC_VER

#define strcasecmp _stricmp

#else

#include <strings.h>  // for strcasecmp, but msvc does not have this header

#endif

namespace absl {

ABSL_NAMESPACE_BEGIN

namespace log_internal {

#define ABSL_LOG_INTERNAL_DEFINE_MAKE_CHECK_OP_STRING(x) \

  template const char* absl_nonnull MakeCheckOpString(   \

      x, x, const char* absl_nonnull)

ABSL_LOG_INTERNAL_DEFINE_MAKE_CHECK_OP_STRING(bool);

ABSL_LOG_INTERNAL_DEFINE_MAKE_CHECK_OP_STRING(int64_t);

ABSL_LOG_INTERNAL_DEFINE_MAKE_CHECK_OP_STRING(uint64_t);

ABSL_LOG_INTERNAL_DEFINE_MAKE_CHECK_OP_STRING(float);

ABSL_LOG_INTERNAL_DEFINE_MAKE_CHECK_OP_STRING(double);

ABSL_LOG_INTERNAL_DEFINE_MAKE_CHECK_OP_STRING(char);

ABSL_LOG_INTERNAL_DEFINE_MAKE_CHECK_OP_STRING(unsigned char);

ABSL_LOG_INTERNAL_DEFINE_MAKE_CHECK_OP_STRING(const std::string&);

ABSL_LOG_INTERNAL_DEFINE_MAKE_CHECK_OP_STRING(const absl::string_view&);

ABSL_LOG_INTERNAL_DEFINE_MAKE_CHECK_OP_STRING(const char*);

ABSL_LOG_INTERNAL_DEFINE_MAKE_CHECK_OP_STRING(const signed char*);

ABSL_LOG_INTERNAL_DEFINE_MAKE_CHECK_OP_STRING(const unsigned char*);

ABSL_LOG_INTERNAL_DEFINE_MAKE_CHECK_OP_STRING(const void*);

#undef ABSL_LOG_INTERNAL_DEFINE_MAKE_CHECK_OP_STRING

CheckOpMessageBuilder::CheckOpMessageBuilder(

    const char* absl_nonnull exprtext) {

  stream_ << exprtext << " (";

}

std::ostream& CheckOpMessageBuilder::ForVar2() {

  stream_ << " vs. ";

  return stream_;

}

const char* absl_nonnull CheckOpMessageBuilder::NewString() {

  stream_ << ")";

  // There's no need to free this string since the process is crashing.

  return absl::IgnoreLeak(new std::string(std::move(stream_).str()))->c_str();

}

void MakeCheckOpValueString(std::ostream& os, const char v) {

  if (v >= 32 && v <= 126) {

    os << "'" << v << "'";

  } else {

    os << "char value " << int{v};

  }

}

void MakeCheckOpValueString(std::ostream& os, const signed char v) {

  if (v >= 32 && v <= 126) {

    os << "'" << v << "'";

  } else {

    os << "signed char value " << int{v};

  }

}

void MakeCheckOpValueString(std::ostream& os, const unsigned char v) {

  if (v >= 32 && v <= 126) {

    os << "'" << v << "'";

  } else {

    os << "unsigned char value " << int{v};

  }

}

void MakeCheckOpValueString(std::ostream& os, const void* p) {

  if (p == nullptr) {

    os << "(null)";

  } else {

    os << p;

  }

}

std::ostream& operator<<(std::ostream& os, UnprintableWrapper) {

  return os << "UNPRINTABLE";

}

// Helper functions for string comparisons.

#define DEFINE_CHECK_STROP_IMPL(name, func, expected)                          \

  const char* absl_nullable Check##func##expected##Impl(                       \

      const char* absl_nullable s1, const char* absl_nullable s2,              \

      const char* absl_nonnull exprtext) {                                     \

    bool equal = s1 == s2 || (s1 && s2 && !func(s1, s2));                      \

    if (equal == expected) {                                                   \

      return nullptr;                                                          \

    } else {                                                                   \

      /* There's no need to free this string since the process is crashing. */ \

      return absl::IgnoreLeak(new std::string(absl::StrCat(exprtext, " (", s1, \

                                                           " vs. ", s2, ")"))) \

          ->c_str();                                                           \

    }                                                                          \

  }

Unexecuted instantiation: absl::log_internal::CheckstrcmptrueImpl(char const*, char const*, char const*)

Unexecuted instantiation: absl::log_internal::CheckstrcmpfalseImpl(char const*, char const*, char const*)

Unexecuted instantiation: absl::log_internal::CheckstrcasecmptrueImpl(char const*, char const*, char const*)

Unexecuted instantiation: absl::log_internal::CheckstrcasecmpfalseImpl(char const*, char const*, char const*)

DEFINE_CHECK_STROP_IMPL(CHECK_STREQ, strcmp, true)

DEFINE_CHECK_STROP_IMPL(CHECK_STRNE, strcmp, false)

DEFINE_CHECK_STROP_IMPL(CHECK_STRCASEEQ, strcasecmp, true)

DEFINE_CHECK_STROP_IMPL(CHECK_STRCASENE, strcasecmp, false)

#undef DEFINE_CHECK_STROP_IMPL

namespace detect_specialization {

StringifySink::StringifySink(std::ostream& os) : os_(os) {}

void StringifySink::Append(absl::string_view text) { os_ << text; }

void StringifySink::Append(size_t length, char ch) {

  for (size_t i = 0; i < length; ++i) os_.put(ch);

}

void AbslFormatFlush(StringifySink* sink, absl::string_view text) {

  sink->Append(text);

}

}  // namespace detect_specialization

}  // namespace log_internal

ABSL_NAMESPACE_END

}  // namespace absl