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Port FlatBuffers to Python.

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Implement code generation and self-contained runtime library for Python.

The test suite verifies:
  - Correctness of generated Python code by comparing output to that of
    the other language ports.
  - The exact bytes in the Builder buffer during many scenarios.
  - Vtable deduplication correctness.
  - Edge cases for table construction, via a fuzzer derived from the Go
    implementation.
  - All code is simultaneously valid in Python 2.6, 2.7, and 3.4.

The test suite includes benchmarks for:
  - Building 'gold' data.
  - Parsing 'gold' data.
  - Deduplicating vtables.

All tests pass on this author's system for the following Python
implementations:
  - CPython 2.6.7
  - CPython 2.7.8
  - CPython 3.4.2
  - PyPy 2.5.0 (CPython 2.7.8 compatible)
This commit is contained in:
rw
2014-12-16 00:32:11 -08:00
parent 4d213c2d06
commit 48dfc69ee6
35 changed files with 3608 additions and 35 deletions
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9
src/idl_gen_text.cpp
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@@ -159,7 +159,8 @@ template<> void Print<const void *>(const void *val,
type = type.VectorType();
// Call PrintVector above specifically for each element type:
switch (type.base_type) {
#define FLATBUFFERS_TD(ENUM, IDLTYPE, CTYPE, JTYPE, GTYPE, NTYPE) \
#define FLATBUFFERS_TD(ENUM, IDLTYPE, CTYPE, JTYPE, GTYPE, NTYPE, \
PTYPE) \
case BASE_TYPE_ ## ENUM: \
PrintVector<CTYPE>( \
*reinterpret_cast<const Vector<CTYPE> *>(val), \
@@ -225,7 +226,8 @@ static void GenStruct(const StructDef &struct_def, const Table *table,
OutputIdentifier(fd.name, opts, _text);
text += ": ";
switch (fd.value.type.base_type) {
#define FLATBUFFERS_TD(ENUM, IDLTYPE, CTYPE, JTYPE, GTYPE, NTYPE) \
#define FLATBUFFERS_TD(ENUM, IDLTYPE, CTYPE, JTYPE, GTYPE, NTYPE, \
PTYPE) \
case BASE_TYPE_ ## ENUM: \
GenField<CTYPE>(fd, table, struct_def.fixed, \
opts, indent + Indent(opts), _text); \
@@ -233,7 +235,8 @@ static void GenStruct(const StructDef &struct_def, const Table *table,
FLATBUFFERS_GEN_TYPES_SCALAR(FLATBUFFERS_TD)
#undef FLATBUFFERS_TD
// Generate drop-thru case statements for all pointer types:
#define FLATBUFFERS_TD(ENUM, IDLTYPE, CTYPE, JTYPE, GTYPE, NTYPE) \
#define FLATBUFFERS_TD(ENUM, IDLTYPE, CTYPE, JTYPE, GTYPE, NTYPE, \
PTYPE) \
case BASE_TYPE_ ## ENUM:
FLATBUFFERS_GEN_TYPES_POINTER(FLATBUFFERS_TD)
#undef FLATBUFFERS_TD