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Refactored the Java and C# code generators into one.

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Also made the C# implementation support unsigned types, and
made it more like the Java version.

Bug: 17359988
Change-Id: If5305c08cd5c97f35426639516ce05e53bbec36c
Tested: on Linux and Windows.
This commit is contained in:
Wouter van Oortmerssen
2014-09-16 17:37:17 -07:00
parent d01b30cdd6
commit 557c88c039
23 changed files with 516 additions and 722 deletions
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81
include/flatbuffers/idl.h
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@@ -32,31 +32,38 @@ namespace flatbuffers {
// Additionally, Parser::ParseType assumes bool..string is a contiguous range
// of type tokens.
#define FLATBUFFERS_GEN_TYPES_SCALAR(TD) \
TD(NONE, "", uint8_t, byte, byte) \
TD(UTYPE, "", uint8_t, byte, byte) /* begin scalars, ints */ \
TD(BOOL, "bool", uint8_t, byte, byte) \
TD(CHAR, "byte", int8_t, byte, int8) \
TD(UCHAR, "ubyte", uint8_t, byte, byte) \
TD(SHORT, "short", int16_t, short, int16) \
TD(USHORT, "ushort", uint16_t, short, uint16) \
TD(INT, "int", int32_t, int, int32) \
TD(UINT, "uint", uint32_t, int, uint32) \
TD(LONG, "long", int64_t, long, int64) \
TD(ULONG, "ulong", uint64_t, long, uint64) /* end ints */ \
TD(FLOAT, "float", float, float, float32) /* begin floats */ \
TD(DOUBLE, "double", double, double, float64) /* end floats, scalars */
TD(NONE, "", uint8_t, byte, byte, byte) \
TD(UTYPE, "", uint8_t, byte, byte, byte) /* begin scalar/int */ \
TD(BOOL, "bool", uint8_t, byte, byte, byte) \
TD(CHAR, "byte", int8_t, byte, int8, sbyte) \
TD(UCHAR, "ubyte", uint8_t, byte, byte, byte) \
TD(SHORT, "short", int16_t, short, int16, short) \
TD(USHORT, "ushort", uint16_t, short, uint16, ushort) \
TD(INT, "int", int32_t, int, int32, int) \
TD(UINT, "uint", uint32_t, int, uint32, uint) \
TD(LONG, "long", int64_t, long, int64, long) \
TD(ULONG, "ulong", uint64_t, long, uint64, ulong) /* end int */ \
TD(FLOAT, "float", float, float, float32, float) /* begin float */ \
TD(DOUBLE, "double", double, double, float64, double) /* end float/scalar */
#define FLATBUFFERS_GEN_TYPES_POINTER(TD) \
TD(STRING, "string", Offset<void>, int, int) \
TD(VECTOR, "", Offset<void>, int, int) \
TD(STRUCT, "", Offset<void>, int, int) \
TD(UNION, "", Offset<void>, int, int)
TD(STRING, "string", Offset<void>, int, int, int) \
TD(VECTOR, "", Offset<void>, int, int, int) \
TD(STRUCT, "", Offset<void>, int, int, int) \
TD(UNION, "", Offset<void>, int, int, int)
// The fields are:
// - enum
// - FlatBuffers schema type.
// - C++ type.
// - Java type.
// - Go type.
// - C# / .Net type.
// using these macros, we can now write code dealing with types just once, e.g.
/*
switch (type) {
#define FLATBUFFERS_TD(ENUM, IDLTYPE, CTYPE, JTYPE, GTYPE) \
#define FLATBUFFERS_TD(ENUM, IDLTYPE, CTYPE, JTYPE, GTYPE, NTYPE) \
case BASE_TYPE_ ## ENUM: \
// do something specific to CTYPE here
FLATBUFFERS_GEN_TYPES(FLATBUFFERS_TD)
@@ -73,12 +80,13 @@ switch (type) {
__extension__ // Stop GCC complaining about trailing comma with -Wpendantic.
#endif
enum BaseType {
#define FLATBUFFERS_TD(ENUM, IDLTYPE, CTYPE, JTYPE, GTYPE) BASE_TYPE_ ## ENUM,
#define FLATBUFFERS_TD(ENUM, IDLTYPE, CTYPE, JTYPE, GTYPE, NTYPE) \
BASE_TYPE_ ## ENUM,
FLATBUFFERS_GEN_TYPES(FLATBUFFERS_TD)
#undef FLATBUFFERS_TD
};
#define FLATBUFFERS_TD(ENUM, IDLTYPE, CTYPE, JTYPE, GTYPE) \
#define FLATBUFFERS_TD(ENUM, IDLTYPE, CTYPE, JTYPE, GTYPE, NTYPE) \
static_assert(sizeof(CTYPE) <= sizeof(largest_scalar_t), \
"define largest_scalar_t as " #CTYPE);
FLATBUFFERS_GEN_TYPES(FLATBUFFERS_TD)
@@ -327,22 +335,11 @@ class Parser {
std::map<std::string, bool> included_files_;
};
// Utility functions for generators:
// Utility functions for multiple generators:
// Convert an underscore_based_indentifier in to camelCase.
// Also uppercases the first character if first is true.
inline std::string MakeCamel(const std::string &in, bool first = true) {
std::string s;
for (size_t i = 0; i < in.length(); i++) {
if (!i && first)
s += static_cast<char>(toupper(in[0]));
else if (in[i] == '_' && i + 1 < in.length())
s += static_cast<char>(toupper(in[++i]));
else
s += in[i];
}
return s;
}
extern std::string MakeCamel(const std::string &in, bool first = true);
extern void GenComment(const std::string &dc, std::string *code_ptr,
const char *prefix = "");
// Container of options that may apply to any of the source/text generators.
struct GeneratorOptions {
@@ -351,8 +348,14 @@ struct GeneratorOptions {
bool output_enum_identifiers;
bool prefixed_enums;
// Possible options for the more general generator below.
enum Language { kJava, kCSharp, kMAX };
Language lang;
GeneratorOptions() : strict_json(false), indent_step(2),
output_enum_identifiers(true), prefixed_enums(true) {}
output_enum_identifiers(true), prefixed_enums(true),
lang(GeneratorOptions::kJava) {}
};
// Generate text (JSON) from a given FlatBuffer, and a given Parser
@@ -397,6 +400,12 @@ extern bool GenerateCSharp(const Parser &parser,
const std::string &file_name,
const GeneratorOptions &opts);
// Generate Java/C#/.. files from the definitions in the Parser object.
// See idl_gen_general.cpp.
extern bool GenerateGeneral(const Parser &parser,
const std::string &path,
const std::string &file_name,
const GeneratorOptions &opts);
} // namespace flatbuffers