Index: third_party/protobuf/src/google/protobuf/io/strtod.cc |
diff --git a/third_party/protobuf/src/google/protobuf/io/strtod.cc b/third_party/protobuf/src/google/protobuf/io/strtod.cc |
new file mode 100644 |
index 0000000000000000000000000000000000000000..a90bb9a31eff3581eb1470255b272708f74ca889 |
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+++ b/third_party/protobuf/src/google/protobuf/io/strtod.cc |
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+// Protocol Buffers - Google's data interchange format |
+// Copyright 2008 Google Inc. All rights reserved. |
+// https://developers.google.com/protocol-buffers/ |
+// |
+// 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. |
+ |
+#include <google/protobuf/io/strtod.h> |
+ |
+#include <cstdio> |
+#include <cstring> |
+#include <limits> |
+#include <string> |
+ |
+#include <google/protobuf/stubs/logging.h> |
+#include <google/protobuf/stubs/common.h> |
+ |
+namespace google { |
+namespace protobuf { |
+namespace io { |
+ |
+// ---------------------------------------------------------------------- |
+// NoLocaleStrtod() |
+// This code will make you cry. |
+// ---------------------------------------------------------------------- |
+ |
+namespace { |
+ |
+// Returns a string identical to *input except that the character pointed to |
+// by radix_pos (which should be '.') is replaced with the locale-specific |
+// radix character. |
+string LocalizeRadix(const char* input, const char* radix_pos) { |
+ // Determine the locale-specific radix character by calling sprintf() to |
+ // print the number 1.5, then stripping off the digits. As far as I can |
+ // tell, this is the only portable, thread-safe way to get the C library |
+ // to divuldge the locale's radix character. No, localeconv() is NOT |
+ // thread-safe. |
+ char temp[16]; |
+ int size = sprintf(temp, "%.1f", 1.5); |
+ GOOGLE_CHECK_EQ(temp[0], '1'); |
+ GOOGLE_CHECK_EQ(temp[size-1], '5'); |
+ GOOGLE_CHECK_LE(size, 6); |
+ |
+ // Now replace the '.' in the input with it. |
+ string result; |
+ result.reserve(strlen(input) + size - 3); |
+ result.append(input, radix_pos); |
+ result.append(temp + 1, size - 2); |
+ result.append(radix_pos + 1); |
+ return result; |
+} |
+ |
+} // namespace |
+ |
+double NoLocaleStrtod(const char* text, char** original_endptr) { |
+ // We cannot simply set the locale to "C" temporarily with setlocale() |
+ // as this is not thread-safe. Instead, we try to parse in the current |
+ // locale first. If parsing stops at a '.' character, then this is a |
+ // pretty good hint that we're actually in some other locale in which |
+ // '.' is not the radix character. |
+ |
+ char* temp_endptr; |
+ double result = strtod(text, &temp_endptr); |
+ if (original_endptr != NULL) *original_endptr = temp_endptr; |
+ if (*temp_endptr != '.') return result; |
+ |
+ // Parsing halted on a '.'. Perhaps we're in a different locale? Let's |
+ // try to replace the '.' with a locale-specific radix character and |
+ // try again. |
+ string localized = LocalizeRadix(text, temp_endptr); |
+ const char* localized_cstr = localized.c_str(); |
+ char* localized_endptr; |
+ result = strtod(localized_cstr, &localized_endptr); |
+ if ((localized_endptr - localized_cstr) > |
+ (temp_endptr - text)) { |
+ // This attempt got further, so replacing the decimal must have helped. |
+ // Update original_endptr to point at the right location. |
+ if (original_endptr != NULL) { |
+ // size_diff is non-zero if the localized radix has multiple bytes. |
+ int size_diff = localized.size() - strlen(text); |
+ // const_cast is necessary to match the strtod() interface. |
+ *original_endptr = const_cast<char*>( |
+ text + (localized_endptr - localized_cstr - size_diff)); |
+ } |
+ } |
+ |
+ return result; |
+} |
+ |
+float SafeDoubleToFloat(double value) { |
+ if (value > std::numeric_limits<float>::max()) { |
+ return std::numeric_limits<float>::infinity(); |
+ } else if (value < -std::numeric_limits<float>::max()) { |
+ return -std::numeric_limits<float>::infinity(); |
+ } else { |
+ return static_cast<float>(value); |
+ } |
+} |
+ |
+} // namespace io |
+} // namespace protobuf |
+} // namespace google |