diff options
Diffstat (limited to 'src/google')
-rw-r--r-- | src/google/protobuf/compiler/javanano/javanano_helpers.cc | 77 | ||||
-rw-r--r-- | src/google/protobuf/compiler/javanano/javanano_helpers.h | 25 |
2 files changed, 102 insertions, 0 deletions
diff --git a/src/google/protobuf/compiler/javanano/javanano_helpers.cc b/src/google/protobuf/compiler/javanano/javanano_helpers.cc index 22b4302f..ebc9c635 100644 --- a/src/google/protobuf/compiler/javanano/javanano_helpers.cc +++ b/src/google/protobuf/compiler/javanano/javanano_helpers.cc @@ -407,6 +407,83 @@ string DefaultValue(const Params& params, const FieldDescriptor* field) { return ""; } + +static const char* kBitMasks[] = { + "0x00000001", + "0x00000002", + "0x00000004", + "0x00000008", + "0x00000010", + "0x00000020", + "0x00000040", + "0x00000080", + + "0x00000100", + "0x00000200", + "0x00000400", + "0x00000800", + "0x00001000", + "0x00002000", + "0x00004000", + "0x00008000", + + "0x00010000", + "0x00020000", + "0x00040000", + "0x00080000", + "0x00100000", + "0x00200000", + "0x00400000", + "0x00800000", + + "0x01000000", + "0x02000000", + "0x04000000", + "0x08000000", + "0x10000000", + "0x20000000", + "0x40000000", + "0x80000000", +}; + +string GetBitFieldName(int index) { + string var_name = "bitField"; + var_name += SimpleItoa(index); + var_name += "_"; + return var_name; +} + +string GetBitFieldNameForBit(int bit_index) { + return GetBitFieldName(bit_index / 32); +} + +string GenerateGetBit(int bit_index) { + string var_name = GetBitFieldNameForBit(bit_index); + int bit_in_var_index = bit_index % 32; + + string mask = kBitMasks[bit_in_var_index]; + string result = "((" + var_name + " & " + mask + ") == " + mask + ")"; + return result; +} + +string GenerateSetBit(int bit_index) { + string var_name = GetBitFieldNameForBit(bit_index); + int bit_in_var_index = bit_index % 32; + + string mask = kBitMasks[bit_in_var_index]; + string result = var_name + " |= " + mask; + return result; +} + +string GenerateClearBit(int bit_index) { + string var_name = GetBitFieldNameForBit(bit_index); + int bit_in_var_index = bit_index % 32; + + string mask = kBitMasks[bit_in_var_index]; + string result = var_name + " = (" + var_name + " & ~" + mask + ")"; + return result; +} + } // namespace javanano } // namespace compiler } // namespace protobuf diff --git a/src/google/protobuf/compiler/javanano/javanano_helpers.h b/src/google/protobuf/compiler/javanano/javanano_helpers.h index 430969bf..03fd4347 100644 --- a/src/google/protobuf/compiler/javanano/javanano_helpers.h +++ b/src/google/protobuf/compiler/javanano/javanano_helpers.h @@ -138,6 +138,31 @@ string EmptyArrayName(const Params& params, const FieldDescriptor* field); string DefaultValue(const Params& params, const FieldDescriptor* field); + +// Methods for shared bitfields. + +// Gets the name of the shared bitfield for the given index. +string GetBitFieldName(int index); + +// Gets the name of the shared bitfield for the given bit index. +// Effectively, GetBitFieldName(bit_index / 32) +string GetBitFieldNameForBit(int bit_index); + +// Generates the java code for the expression that returns the boolean value +// of the bit of the shared bitfields for the given bit index. +// Example: "((bitField1_ & 0x04) == 0x04)" +string GenerateGetBit(int bit_index); + +// Generates the java code for the expression that sets the bit of the shared +// bitfields for the given bit index. +// Example: "bitField1_ = (bitField1_ | 0x04)" +string GenerateSetBit(int bit_index); + +// Generates the java code for the expression that clears the bit of the shared +// bitfields for the given bit index. +// Example: "bitField1_ = (bitField1_ & ~0x04)" +string GenerateClearBit(int bit_index); + } // namespace javanano } // namespace compiler } // namespace protobuf |