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Merge pull request #3498 from ncpenke/gcc-4.4.3-support

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Gcc 4.4.3 support
This commit is contained in:
Wouter van Oortmerssen
2016-01-19 10:27:57 -08:00
parent 63b526db52 b63ebad49d
commit 6136dd490a
12 changed files with 166 additions and 90 deletions
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48
include/flatbuffers/flatbuffers.h
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@@ -33,11 +33,30 @@
#if __cplusplus <= 199711L && \
(!defined(_MSC_VER) || _MSC_VER < 1600) && \
(!defined(__GNUC__) || \
(__GNUC__ * 10000 + __GNUC_MINOR__ * 100 + __GNUC_PATCHLEVEL__ < 40603))
#error A C++11 compatible compiler is required for FlatBuffers.
(__GNUC__ * 10000 + __GNUC_MINOR__ * 100 + __GNUC_PATCHLEVEL__ < 40400))
#error A C++11 compatible compiler with support for the auto typing is required for FlatBuffers.
#error __cplusplus _MSC_VER __GNUC__ __GNUC_MINOR__ __GNUC_PATCHLEVEL__
#endif
#if !defined(__clang__) && \
defined(__GNUC__) && \
(__GNUC__ * 10000 + __GNUC_MINOR__ * 100 + __GNUC_PATCHLEVEL__ < 40600)
// Backwards compatability for g++ 4.4, and 4.5 which don't have the nullptr and constexpr
// keywords. Note the __clang__ check is needed, because clang presents itself as an older GNUC
// compiler.
#ifndef nullptr_t
const class nullptr_t {
public:
template<class T> inline operator T*() const { return 0; }
private:
void operator&() const;
} nullptr = {};
#endif
#ifndef constexpr
#define constexpr const
#endif
#endif
// The wire format uses a little endian encoding (since that's efficient for
// the common platforms).
#if !defined(FLATBUFFERS_LITTLEENDIAN)
@@ -154,7 +173,11 @@ template<typename T> size_t AlignOf() {
#ifdef _MSC_VER
return __alignof(T);
#else
return alignof(T);
#ifndef alignof
return __alignof__(T);
#else
return alignof(T);
#endif
#endif
}
@@ -836,15 +859,20 @@ class FlatBufferBuilder FLATBUFFERS_FINAL_CLASS {
return CreateVectorOfStructs(v.data(), v.size());
}
template<typename T>
struct TableKeyComparator {
TableKeyComparator(vector_downward& buf) : buf_(buf) {}
bool operator()(const Offset<T> &a, const Offset<T> &b) const {
auto table_a = reinterpret_cast<T *>(buf_.data_at(a.o));
auto table_b = reinterpret_cast<T *>(buf_.data_at(b.o));
return table_a->KeyCompareLessThan(table_b);
}
vector_downward& buf_;
};
template<typename T> Offset<Vector<Offset<T>>> CreateVectorOfSortedTables(
Offset<T> *v, size_t len) {
std::sort(v, v + len,
[this](const Offset<T> &a, const Offset<T> &b) -> bool {
auto table_a = reinterpret_cast<T *>(buf_.data_at(a.o));
auto table_b = reinterpret_cast<T *>(buf_.data_at(b.o));
return table_a->KeyCompareLessThan(table_b);
}
);
std::sort(v, v + len, TableKeyComparator<T>(buf_));
return CreateVector(v, len);
}

6
include/flatbuffers/hash.h
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@@ -20,6 +20,8 @@
#include <cstdint>
#include <cstring>
#include "flatbuffers/flatbuffers.h"
namespace flatbuffers {
template <typename T>
@@ -36,8 +38,8 @@ struct FnvTraits<uint32_t> {
template <>
struct FnvTraits<uint64_t> {
static const uint64_t kFnvPrime = 0x00000100000001b3;
static const uint64_t kOffsetBasis = 0xcbf29ce484222645;
static const uint64_t kFnvPrime = 0x00000100000001b3ULL;
static const uint64_t kOffsetBasis = 0xcbf29ce484222645ULL;
};
template <typename T>

4
include/flatbuffers/idl.h
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@@ -491,6 +491,10 @@ private:
FLATBUFFERS_CHECKED_ERROR DoParse(const char *_source,
const char **include_paths,
const char *source_filename);
FLATBUFFERS_CHECKED_ERROR CheckClash(std::vector<FieldDef*> &fields,
StructDef *struct_def,
const char *suffix,
BaseType baseType);
public:
SymbolTable<StructDef> structs_;

8
include/flatbuffers/util.h
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@@ -38,6 +38,8 @@
#include <limits.h>
#endif
#include "flatbuffers/flatbuffers.h"
namespace flatbuffers {
// Convert an integer or floating point value to a string.
@@ -68,7 +70,7 @@ template<> inline std::string NumToString<double>(double t) {
auto p = s.find_last_not_of('0');
if (p != std::string::npos) {
s.resize(p + 1); // Strip trailing zeroes.
if (s.back() == '.')
if (s[s.size() - 1] == '.')
s.erase(s.size() - 1, 1); // Strip '.' if a whole number.
}
return s;
@@ -197,8 +199,8 @@ inline std::string StripFileName(const std::string &filepath) {
inline std::string ConCatPathFileName(const std::string &path,
const std::string &filename) {
std::string filepath = path;
if (path.length() && path.back() != kPathSeparator &&
path.back() != kPosixPathSeparator)
if (path.length() && path[path.size() - 1] != kPathSeparator &&
path[path.size() - 1] != kPosixPathSeparator)
filepath += kPathSeparator;
filepath += filename;
return filepath;