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File identifier feature.

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Allows you to add, and test for the presence of a magic 4-char
string in a FlatBuffer.

Tested: on OS X.

Change-Id: I090692a9e4fb53bed3543279a28563e67132cba0
This commit is contained in:
Wouter van Oortmerssen
2014-07-31 15:11:03 -07:00
parent be3c874258
commit 5da7bda826
13 changed files with 128 additions and 10 deletions
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20
src/idl_gen_cpp.cpp
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@@ -466,18 +466,36 @@ std::string GenerateCPP(const Parser &parser, const std::string &include_guard_i
code += decl_code;
code += enum_code_post;
// Generate convenient root datatype accessor, and root verifier.
// Generate convenient global helper functions:
if (parser.root_struct_def) {
// The root datatype accessor:
code += "inline const " + parser.root_struct_def->name + " *Get";
code += parser.root_struct_def->name;
code += "(const void *buf) { return flatbuffers::GetRoot<";
code += parser.root_struct_def->name + ">(buf); }\n\n";
// The root verifier:
code += "inline bool Verify";
code += parser.root_struct_def->name;
code += "Buffer(const flatbuffers::Verifier &verifier) { "
"return verifier.VerifyBuffer<";
code += parser.root_struct_def->name + ">(); }\n\n";
// Finish a buffer with a given root object:
code += "inline void Finish" + parser.root_struct_def->name;
code += "Buffer(flatbuffers::FlatBufferBuilder &fbb, flatbuffers::Offset<";
code += parser.root_struct_def->name + "> root) { fbb.Finish(root";
if (parser.file_identifier_.length())
code += ", \"" + parser.file_identifier_ + "\"";
code += "); }\n\n";
if (parser.file_identifier_.length()) {
// Check if a buffer has the identifier.
code += "inline bool " + parser.root_struct_def->name;
code += "BufferHasIdentifier(const void *buf) { return flatbuffers::";
code += "BufferHasIdentifier(buf, \"" + parser.file_identifier_;
code += "\"); }\n\n";
}
}
// Close the namespaces.