Make some foo.h headers usable without foo-inl.h header.

src/conversions-inl.h

 // Copyright 2011 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_CONVERSIONS_INL_H_
 #define V8_CONVERSIONS_INL_H_
 
 #include <float.h>         // Required for DBL_MAX and on Win32 for finite()
 #include <limits.h>        // Required for INT_MAX etc.
 #include <stdarg.h>
 #include <cmath>
 #include "src/globals.h"       // Required for V8_INFINITY
 
 // ----------------------------------------------------------------------------
 // Extra POSIX/ANSI functions for Win32/MSVC.
 
 #include "src/base/bits.h"
 #include "src/base/platform/platform.h"
 #include "src/conversions.h"
 #include "src/double.h"
+#include "src/objects-inl.h"
 #include "src/scanner.h"
 #include "src/strtod.h"
 
 namespace v8 {
 namespace internal {
 
 inline double JunkStringValue() {
   return bit_cast<double, uint64_t>(kQuietNaNMask);
 }
 
@@ skipping 59 matching lines @@
   if (exponent < 0) {
     if (exponent <= -Double::kSignificandSize) return 0;
     return d.Sign() * static_cast<int32_t>(d.Significand() >> -exponent);
   } else {
     if (exponent > 31) return 0;
     return d.Sign() * static_cast<int32_t>(d.Significand() << exponent);
   }
 }
 
 
+bool IsSmiDouble(double value) {
+  return !IsMinusZero(value) && value >= Smi::kMinValue &&
+         value <= Smi::kMaxValue && value == FastI2D(FastD2I(value));
+}
+
+
+bool IsInt32Double(double value) {
+  return !IsMinusZero(value) && value >= kMinInt && value <= kMaxInt &&
+         value == FastI2D(FastD2I(value));
+}
+
+
+bool IsUint32Double(double value) {
+  return !IsMinusZero(value) && value >= 0 && value <= kMaxUInt32 &&
+         value == FastUI2D(FastD2UI(value));
+}
+
+
+int32_t NumberToInt32(Object* number) {
+  if (number->IsSmi()) return Smi::cast(number)->value();
+  return DoubleToInt32(number->Number());
+}
+
+
+uint32_t NumberToUint32(Object* number) {
+  if (number->IsSmi()) return Smi::cast(number)->value();
+  return DoubleToUint32(number->Number());
+}
+
+
+bool TryNumberToSize(Isolate* isolate, Object* number, size_t* result) {
+  SealHandleScope shs(isolate);
+  if (number->IsSmi()) {
+    int value = Smi::cast(number)->value();
+    DCHECK(static_cast<unsigned>(Smi::kMaxValue) <=
+           std::numeric_limits<size_t>::max());
+    if (value >= 0) {
+      *result = static_cast<size_t>(value);
+      return true;
+    }
+    return false;
+  } else {
+    DCHECK(number->IsHeapNumber());
+    double value = HeapNumber::cast(number)->value();
+    if (value >= 0 && value <= std::numeric_limits<size_t>::max()) {
+      *result = static_cast<size_t>(value);
+      return true;
+    } else {
+      return false;
+    }
+  }
+}
+
+
+size_t NumberToSize(Isolate* isolate, Object* number) {
+  size_t result = 0;
+  bool is_valid = TryNumberToSize(isolate, number, &result);
+  CHECK(is_valid);
+  return result;
+}
+
+
 template <class Iterator, class EndMark>
 bool SubStringEquals(Iterator* current,
                      EndMark end,
                      const char* substring) {
   DCHECK(**current == *substring);
   for (substring++; *substring != '\0'; substring++) {
     ++*current;
     if (*current == end || **current != *substring) return false;
   }
   ++*current;
@@ skipping 575 matching lines @@
   SLOW_DCHECK(buffer_pos < kBufferSize);
   buffer[buffer_pos] = '\0';
 
   double converted = Strtod(Vector<const char>(buffer, buffer_pos), exponent);
   return (sign == NEGATIVE) ? -converted : converted;
 }
 
 } }  // namespace v8::internal
 
 #endif  // V8_CONVERSIONS_INL_H_