1 files changed, 118 insertions, 0 deletions
diff --git a/absl/log/internal/check_op.cc b/absl/log/internal/check_op.cc
new file mode 100644
index 00000000..f4b67647
--- /dev/null
+++ b/absl/log/internal/check_op.cc
@@ -0,0 +1,118 @@
+// 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 <string.h>
+
+#ifdef _MSC_VER
+#define strcasecmp _stricmp
+#else
+#include <strings.h>  // for strcasecmp, but msvc does not have this header
+#endif
+
+#include <sstream>
+#include <string>
+
+#include "absl/base/config.h"
+#include "absl/strings/str_cat.h"
+
+namespace absl {
+ABSL_NAMESPACE_BEGIN
+namespace log_internal {
+
+#define ABSL_LOGGING_INTERNAL_DEFINE_MAKE_CHECK_OP_STRING(x) \
+  template std::string* MakeCheckOpString(x, x, const char*)
+ABSL_LOGGING_INTERNAL_DEFINE_MAKE_CHECK_OP_STRING(bool);
+ABSL_LOGGING_INTERNAL_DEFINE_MAKE_CHECK_OP_STRING(int64_t);
+ABSL_LOGGING_INTERNAL_DEFINE_MAKE_CHECK_OP_STRING(uint64_t);
+ABSL_LOGGING_INTERNAL_DEFINE_MAKE_CHECK_OP_STRING(float);
+ABSL_LOGGING_INTERNAL_DEFINE_MAKE_CHECK_OP_STRING(double);
+ABSL_LOGGING_INTERNAL_DEFINE_MAKE_CHECK_OP_STRING(char);
+ABSL_LOGGING_INTERNAL_DEFINE_MAKE_CHECK_OP_STRING(unsigned char);
+ABSL_LOGGING_INTERNAL_DEFINE_MAKE_CHECK_OP_STRING(const std::string&);
+ABSL_LOGGING_INTERNAL_DEFINE_MAKE_CHECK_OP_STRING(const absl::string_view&);
+ABSL_LOGGING_INTERNAL_DEFINE_MAKE_CHECK_OP_STRING(const char*);
+ABSL_LOGGING_INTERNAL_DEFINE_MAKE_CHECK_OP_STRING(const signed char*);
+ABSL_LOGGING_INTERNAL_DEFINE_MAKE_CHECK_OP_STRING(const unsigned char*);
+ABSL_LOGGING_INTERNAL_DEFINE_MAKE_CHECK_OP_STRING(const void*);
+#undef ABSL_LOGGING_INTERNAL_DEFINE_MAKE_CHECK_OP_STRING
+
+CheckOpMessageBuilder::CheckOpMessageBuilder(const char* exprtext) {
+  stream_ << exprtext << " (";
+}
+
+std::ostream& CheckOpMessageBuilder::ForVar2() {
+  stream_ << " vs. ";
+  return stream_;
+}
+
+std::string* CheckOpMessageBuilder::NewString() {
+  stream_ << ")";
+  return new std::string(stream_.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;
+  }
+}
+
+// Helper functions for string comparisons.
+#define DEFINE_CHECK_STROP_IMPL(name, func, expected)                      \
+  std::string* Check##func##expected##Impl(const char* s1, const char* s2, \
+                                           const char* exprtext) {         \
+    bool equal = s1 == s2 || (s1 && s2 && !func(s1, s2));                  \
+    if (equal == expected) {                                               \
+      return nullptr;                                                      \
+    } else {                                                               \
+      return new std::string(                                              \
+          absl::StrCat(exprtext, " (", s1, " vs. ", s2, ")"));             \
+    }                                                                      \
+  }
+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 log_internal
+ABSL_NAMESPACE_END
+}  // namespace absl