// Copyright 2006-2008 the V8 project authors. All rights reserved.
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
//     * Redistributions of source code must retain the above copyright
//       notice, this list of conditions and the following disclaimer.
//     * Redistributions in binary form must reproduce the above
//       copyright notice, this list of conditions and the following
//       disclaimer in the documentation and/or other materials provided
//       with the distribution.
//     * Neither the name of Google Inc. nor the names of its
//       contributors may be used to endorse or promote products derived
//       from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

#ifndef V8_CHECKS_H_
#define V8_CHECKS_H_

#include <string.h>

extern "C" void V8_Fatal(const char* file, int line, const char* format, ...);

// The FATAL, UNREACHABLE and UNIMPLEMENTED macros are useful during
// development, but they should not be relied on in the final product.

#ifdef DEBUG
#define FATAL(msg)                              \
  V8_Fatal(__FILE__, __LINE__, "%s", (msg))
#define UNIMPLEMENTED()                         \
  V8_Fatal(__FILE__, __LINE__, "unimplemented code")
#define UNREACHABLE()                           \
  V8_Fatal(__FILE__, __LINE__, "unreachable code")
#else
#define FATAL(msg)                              \
  V8_Fatal("", 0, "%s", (msg))
#define UNIMPLEMENTED()                         \
  V8_Fatal("", 0, "unimplemented code")
#define UNREACHABLE() ((void) 0)
#endif

// Used by the CHECK macro -- should not be called directly.
static inline void CheckHelper(const char* file,
                               int line,
                               const char* source,
                               bool condition) {
  if (!condition)
    V8_Fatal(file, line, source);
}


// The CHECK macro checks that the given condition is true; if not, it
// prints a message to stderr and aborts.
#define CHECK(condition) ::CheckHelper(__FILE__, __LINE__, #condition, condition)


// Helper function used by the CHECK_EQ function when given int
// arguments.  Should not be called directly.
static inline void CheckEqualsHelper(const char* file, int line,
                                     const char* expected_source, int expected,
                                     const char* value_source, int value) {
  if (expected != value) {
    V8_Fatal(file, line,
             "CHECK_EQ(%s, %s) failed\n#   Expected: %i\n#   Found: %i",
             expected_source, value_source, expected, value);
  }
}


#define CHECK_EQ(expected, value) CheckEqualsHelper(__FILE__, __LINE__, \
  #expected, expected, #value, value)


// The ASSERT macro is equivalent to CHECK except that it only
// generates code in debug builds.
#ifdef DEBUG
#define ASSERT(condition)    CHECK(condition)
#else
#define ASSERT(condition)      ((void) 0)
#endif

#endif  // V8_CHECKS_H_
