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Diffstat (limited to 'src/google/protobuf/stubs/stringprintf.cc')
| -rw-r--r-- | src/google/protobuf/stubs/stringprintf.cc | 175 |
1 files changed, 0 insertions, 175 deletions
diff --git a/src/google/protobuf/stubs/stringprintf.cc b/src/google/protobuf/stubs/stringprintf.cc deleted file mode 100644 index 3272d8e..0000000 --- a/src/google/protobuf/stubs/stringprintf.cc +++ /dev/null @@ -1,175 +0,0 @@ -// Protocol Buffers - Google's data interchange format -// Copyright 2012 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. - -// from google3/base/stringprintf.cc - -#include <google/protobuf/stubs/stringprintf.h> - -#include <errno.h> -#include <stdarg.h> // For va_list and related operations -#include <stdio.h> // MSVC requires this for _vsnprintf -#include <vector> -#include <google/protobuf/stubs/common.h> -#include <google/protobuf/testing/googletest.h> - -namespace google { -namespace protobuf { - -#ifdef _MSC_VER -enum { IS_COMPILER_MSVC = 1 }; -#ifndef va_copy -// Define va_copy for MSVC. This is a hack, assuming va_list is simply a -// pointer into the stack and is safe to copy. -#define va_copy(dest, src) ((dest) = (src)) -#endif -#else -enum { IS_COMPILER_MSVC = 0 }; -#endif - -void StringAppendV(string* dst, const char* format, va_list ap) { - // First try with a small fixed size buffer - static const int kSpaceLength = 1024; - char space[kSpaceLength]; - - // It's possible for methods that use a va_list to invalidate - // the data in it upon use. The fix is to make a copy - // of the structure before using it and use that copy instead. - va_list backup_ap; - va_copy(backup_ap, ap); - int result = vsnprintf(space, kSpaceLength, format, backup_ap); - va_end(backup_ap); - - if (result < kSpaceLength) { - if (result >= 0) { - // Normal case -- everything fit. - dst->append(space, result); - return; - } - - if (IS_COMPILER_MSVC) { - // Error or MSVC running out of space. MSVC 8.0 and higher - // can be asked about space needed with the special idiom below: - va_copy(backup_ap, ap); - result = vsnprintf(NULL, 0, format, backup_ap); - va_end(backup_ap); - } - - if (result < 0) { - // Just an error. - return; - } - } - - // Increase the buffer size to the size requested by vsnprintf, - // plus one for the closing \0. - int length = result+1; - char* buf = new char[length]; - - // Restore the va_list before we use it again - va_copy(backup_ap, ap); - result = vsnprintf(buf, length, format, backup_ap); - va_end(backup_ap); - - if (result >= 0 && result < length) { - // It fit - dst->append(buf, result); - } - delete[] buf; -} - - -string StringPrintf(const char* format, ...) { - va_list ap; - va_start(ap, format); - string result; - StringAppendV(&result, format, ap); - va_end(ap); - return result; -} - -const string& SStringPrintf(string* dst, const char* format, ...) { - va_list ap; - va_start(ap, format); - dst->clear(); - StringAppendV(dst, format, ap); - va_end(ap); - return *dst; -} - -void StringAppendF(string* dst, const char* format, ...) { - va_list ap; - va_start(ap, format); - StringAppendV(dst, format, ap); - va_end(ap); -} - -// Max arguments supported by StringPrintVector -const int kStringPrintfVectorMaxArgs = 32; - -// An empty block of zero for filler arguments. This is const so that if -// printf tries to write to it (via %n) then the program gets a SIGSEGV -// and we can fix the problem or protect against an attack. -static const char string_printf_empty_block[256] = { '\0' }; - -string StringPrintfVector(const char* format, const vector<string>& v) { - GOOGLE_CHECK_LE(v.size(), kStringPrintfVectorMaxArgs) - << "StringPrintfVector currently only supports up to " - << kStringPrintfVectorMaxArgs << " arguments. " - << "Feel free to add support for more if you need it."; - - // Add filler arguments so that bogus format+args have a harder time - // crashing the program, corrupting the program (%n), - // or displaying random chunks of memory to users. - - const char* cstr[kStringPrintfVectorMaxArgs]; - for (int i = 0; i < v.size(); ++i) { - cstr[i] = v[i].c_str(); - } - for (int i = v.size(); i < GOOGLE_ARRAYSIZE(cstr); ++i) { - cstr[i] = &string_printf_empty_block[0]; - } - - // I do not know any way to pass kStringPrintfVectorMaxArgs arguments, - // or any way to build a va_list by hand, or any API for printf - // that accepts an array of arguments. The best I can do is stick - // this COMPILE_ASSERT right next to the actual statement. - - GOOGLE_COMPILE_ASSERT(kStringPrintfVectorMaxArgs == 32, arg_count_mismatch); - return StringPrintf(format, - cstr[0], cstr[1], cstr[2], cstr[3], cstr[4], - cstr[5], cstr[6], cstr[7], cstr[8], cstr[9], - cstr[10], cstr[11], cstr[12], cstr[13], cstr[14], - cstr[15], cstr[16], cstr[17], cstr[18], cstr[19], - cstr[20], cstr[21], cstr[22], cstr[23], cstr[24], - cstr[25], cstr[26], cstr[27], cstr[28], cstr[29], - cstr[30], cstr[31]); -} -} // namespace protobuf -} // namespace google |