1// Custom options for defining: 2// - Maximum size of string/bytes 3// - Maximum number of elements in array 4// 5// These are used by nanopb to generate statically allocable structures 6// for memory-limited environments. 7 8syntax = "proto2"; 9import "google/protobuf/descriptor.proto"; 10 11option java_package = "fi.kapsi.koti.jpa.nanopb"; 12 13enum FieldType { 14 FT_DEFAULT = 0; // Automatically decide field type, generate static field if possible. 15 FT_CALLBACK = 1; // Always generate a callback field. 16 FT_POINTER = 4; // Always generate a dynamically allocated field. 17 FT_STATIC = 2; // Generate a static field or raise an exception if not possible. 18 FT_IGNORE = 3; // Ignore the field completely. 19 FT_INLINE = 5; // Always generate an inline array of fixed size. 20} 21 22enum IntSize { 23 IS_DEFAULT = 0; // Default, 32/64bit based on type in .proto 24 IS_8 = 8; 25 IS_16 = 16; 26 IS_32 = 32; 27 IS_64 = 64; 28} 29 30// This is the inner options message, which basically defines options for 31// a field. When it is used in message or file scope, it applies to all 32// fields. 33message NanoPBOptions { 34 // Allocated size for 'bytes' and 'string' fields. 35 optional int32 max_size = 1; 36 37 // Allocated number of entries in arrays ('repeated' fields) 38 optional int32 max_count = 2; 39 40 // Size of integer fields. Can save some memory if you don't need 41 // full 32 bits for the value. 42 optional IntSize int_size = 7 [default = IS_DEFAULT]; 43 44 // Force type of field (callback or static allocation) 45 optional FieldType type = 3 [default = FT_DEFAULT]; 46 47 // Use long names for enums, i.e. EnumName_EnumValue. 48 optional bool long_names = 4 [default = true]; 49 50 // Add 'packed' attribute to generated structs. 51 // Note: this cannot be used on CPUs that break on unaligned 52 // accesses to variables. 53 optional bool packed_struct = 5 [default = false]; 54 55 // Add 'packed' attribute to generated enums. 56 optional bool packed_enum = 10 [default = false]; 57 58 // Skip this message 59 optional bool skip_message = 6 [default = false]; 60 61 // Generate oneof fields as normal optional fields instead of union. 62 optional bool no_unions = 8 [default = false]; 63 64 // integer type tag for a message 65 optional uint32 msgid = 9; 66 67 // decode oneof as anonymous union 68 optional bool anonymous_oneof = 11 [default = false]; 69} 70 71// Extensions to protoc 'Descriptor' type in order to define options 72// inside a .proto file. 73// 74// Protocol Buffers extension number registry 75// -------------------------------- 76// Project: Nanopb 77// Contact: Petteri Aimonen <jpa@kapsi.fi> 78// Web site: http://kapsi.fi/~jpa/nanopb 79// Extensions: 1010 (all types) 80// -------------------------------- 81 82extend google.protobuf.FileOptions { 83 optional NanoPBOptions nanopb_fileopt = 1010; 84} 85 86extend google.protobuf.MessageOptions { 87 optional NanoPBOptions nanopb_msgopt = 1010; 88} 89 90extend google.protobuf.EnumOptions { 91 optional NanoPBOptions nanopb_enumopt = 1010; 92} 93 94extend google.protobuf.FieldOptions { 95 optional NanoPBOptions nanopb = 1010; 96} 97 98 99