1 /* 2 * Copyright 2005-2007, Haiku Inc. All Rights Reserved. 3 * Distributed under the terms of the MIT License. 4 * 5 * Authors: 6 * Michael Lotz <mmlr@mlotz.ch> 7 */ 8 #ifndef _MESSAGE_H 9 #define _MESSAGE_H 10 11 12 #include <BeBuild.h> 13 #include <DataIO.h> 14 #include <Flattenable.h> 15 #include <OS.h> 16 #include <Rect.h> 17 18 #include <AppDefs.h> /* For convenience */ 19 #include <TypeConstants.h> /* For convenience */ 20 21 class BBlockCache; 22 class BMessenger; 23 class BHandler; 24 class BString; 25 struct entry_ref; 26 27 28 // Name lengths and Scripting specifiers 29 #define B_FIELD_NAME_LENGTH 255 30 #define B_PROPERTY_NAME_LENGTH 255 31 32 enum { 33 B_NO_SPECIFIER = 0, 34 B_DIRECT_SPECIFIER = 1, 35 B_INDEX_SPECIFIER, 36 B_REVERSE_INDEX_SPECIFIER, 37 B_RANGE_SPECIFIER, 38 B_REVERSE_RANGE_SPECIFIER, 39 B_NAME_SPECIFIER, 40 B_ID_SPECIFIER, 41 42 B_SPECIFIERS_END = 128 43 // app-defined specifiers start at B_SPECIFIERS_END + 1 44 }; 45 46 class BMessage { 47 public: 48 uint32 what; 49 50 BMessage(); 51 BMessage(uint32 what); 52 BMessage(const BMessage &other); 53 virtual ~BMessage(); 54 55 BMessage &operator=(const BMessage &other); 56 57 // Statistics and misc info 58 status_t GetInfo(type_code typeRequested, int32 index, 59 char **nameFound, type_code *typeFound, 60 int32 *countFound = NULL) const; 61 status_t GetInfo(const char *name, type_code *typeFound, 62 int32 *countFound = NULL) const; 63 status_t GetInfo(const char *name, type_code *typeFound, 64 bool *fixedSize) const; 65 66 int32 CountNames(type_code type) const; 67 bool IsEmpty() const; 68 bool IsSystem() const; 69 bool IsReply() const; 70 void PrintToStream() const; 71 72 status_t Rename(const char *oldEntry, const char *newEntry); 73 74 // Delivery info 75 bool WasDelivered() const; 76 bool IsSourceWaiting() const; 77 BMessenger ReturnAddress() const; 78 const BMessage *Previous() const; 79 bool WasDropped() const; 80 BPoint DropPoint(BPoint *offset = NULL) const; 81 82 // Flattening data 83 ssize_t FlattenedSize() const; 84 status_t Flatten(char *buffer, ssize_t size) const; 85 status_t Flatten(BDataIO *stream, ssize_t *size = NULL) const; 86 status_t Unflatten(const char *flatBuffer); 87 status_t Unflatten(BDataIO *stream); 88 89 // Specifiers (scripting) 90 status_t AddSpecifier(const char *property); 91 status_t AddSpecifier(const char *property, int32 index); 92 status_t AddSpecifier(const char *property, int32 index, int32 range); 93 status_t AddSpecifier(const char *property, const char *name); 94 status_t AddSpecifier(const BMessage *specifier); 95 96 status_t SetCurrentSpecifier(int32 index); 97 status_t GetCurrentSpecifier(int32 *index, 98 BMessage *specifier = NULL, int32 *what = NULL, 99 const char **property = NULL) const; 100 bool HasSpecifiers() const; 101 status_t PopSpecifier(); 102 103 // Adding data 104 status_t AddRect(const char *name, BRect aRect); 105 status_t AddPoint(const char *name, BPoint aPoint); 106 status_t AddString(const char *name, const char *aString); 107 status_t AddString(const char *name, const BString &aString); 108 status_t AddInt8(const char *name, int8 value); 109 status_t AddInt16(const char *name, int16 value); 110 status_t AddInt32(const char *name, int32 value); 111 status_t AddInt64(const char *name, int64 value); 112 status_t AddBool(const char *name, bool aBoolean); 113 status_t AddFloat(const char *name, float aFloat); 114 status_t AddDouble(const char *name, double aDouble); 115 status_t AddPointer(const char *name, const void *aPointer); 116 status_t AddMessenger(const char *name, BMessenger messenger); 117 status_t AddRef(const char *name, const entry_ref *ref); 118 status_t AddMessage(const char *name, const BMessage *message); 119 status_t AddFlat(const char *name, BFlattenable *object, 120 int32 count = 1); 121 status_t AddData(const char *name, type_code type, 122 const void *data, ssize_t numBytes, 123 bool isFixedSize = true, int32 count = 1); 124 125 // Removing data 126 status_t RemoveData(const char *name, int32 index = 0); 127 status_t RemoveName(const char *name); 128 status_t MakeEmpty(); 129 130 // Finding data 131 status_t FindRect(const char *name, BRect *rect) const; 132 status_t FindRect(const char *name, int32 index, BRect *rect) const; 133 status_t FindPoint(const char *name, BPoint *point) const; 134 status_t FindPoint(const char *name, int32 index, BPoint *point) const; 135 status_t FindString(const char *name, const char **string) const; 136 status_t FindString(const char *name, int32 index, const char **string) const; 137 status_t FindString(const char *name, BString *string) const; 138 status_t FindString(const char *name, int32 index, BString *string) const; 139 status_t FindInt8(const char *name, int8 *value) const; 140 status_t FindInt8(const char *name, int32 index, int8 *value) const; 141 status_t FindInt16(const char *name, int16 *value) const; 142 status_t FindInt16(const char *name, int32 index, int16 *value) const; 143 status_t FindInt32(const char *name, int32 *value) const; 144 status_t FindInt32(const char *name, int32 index, int32 *value) const; 145 status_t FindInt64(const char *name, int64 *value) const; 146 status_t FindInt64(const char *name, int32 index, int64 *value) const; 147 status_t FindBool(const char *name, bool *value) const; 148 status_t FindBool(const char *name, int32 index, bool *value) const; 149 status_t FindFloat(const char *name, float *value) const; 150 status_t FindFloat(const char *name, int32 index, float *value) const; 151 status_t FindDouble(const char *name, double *value) const; 152 status_t FindDouble(const char *name, int32 index, double *value) const; 153 status_t FindPointer(const char *name, void **pointer) const; 154 status_t FindPointer(const char *name, int32 index, void **pointer) const; 155 status_t FindMessenger(const char *name, BMessenger *messenger) const; 156 status_t FindMessenger(const char *name, int32 index, BMessenger *messenger) const; 157 status_t FindRef(const char *name, entry_ref *ref) const; 158 status_t FindRef(const char *name, int32 index, entry_ref *ref) const; 159 status_t FindMessage(const char *name, BMessage *message) const; 160 status_t FindMessage(const char *name, int32 index, BMessage *message) const; 161 status_t FindFlat(const char *name, BFlattenable *object) const; 162 status_t FindFlat(const char *name, int32 index, BFlattenable *object) const; 163 status_t FindData(const char *name, type_code type, 164 const void **data, ssize_t *numBytes) const; 165 status_t FindData(const char *name, type_code type, int32 index, 166 const void **data, ssize_t *numBytes) const; 167 168 // Replacing data 169 status_t ReplaceRect(const char *name, BRect aRect); 170 status_t ReplaceRect(const char *name, int32 index, BRect aRect); 171 status_t ReplacePoint(const char *name, BPoint aPoint); 172 status_t ReplacePoint(const char *name, int32 index, BPoint aPoint); 173 status_t ReplaceString(const char *name, const char *aString); 174 status_t ReplaceString(const char *name, int32 index, const char *aString); 175 status_t ReplaceString(const char *name, const BString &aString); 176 status_t ReplaceString(const char *name, int32 index, const BString &aString); 177 status_t ReplaceInt8(const char *name, int8 value); 178 status_t ReplaceInt8(const char *name, int32 index, int8 value); 179 status_t ReplaceInt16(const char *name, int16 value); 180 status_t ReplaceInt16(const char *name, int32 index, int16 value); 181 status_t ReplaceInt32(const char *name, int32 value); 182 status_t ReplaceInt32(const char *name, int32 index, int32 value); 183 status_t ReplaceInt64(const char *name, int64 value); 184 status_t ReplaceInt64(const char *name, int32 index, int64 value); 185 status_t ReplaceBool(const char *name, bool aBoolean); 186 status_t ReplaceBool(const char *name, int32 index, bool aBoolean); 187 status_t ReplaceFloat(const char *name, float aFloat); 188 status_t ReplaceFloat(const char *name, int32 index, float aFloat); 189 status_t ReplaceDouble(const char *name, double aDouble); 190 status_t ReplaceDouble(const char *name, int32 index, double aDouble); 191 status_t ReplacePointer(const char *name, const void *pointer); 192 status_t ReplacePointer(const char *name,int32 index,const void *pointer); 193 status_t ReplaceMessenger(const char *name, BMessenger messenger); 194 status_t ReplaceMessenger(const char *name, int32 index, BMessenger messenger); 195 status_t ReplaceRef( const char *name,const entry_ref *ref); 196 status_t ReplaceRef( const char *name, int32 index, const entry_ref *ref); 197 status_t ReplaceMessage(const char *name, const BMessage *message); 198 status_t ReplaceMessage(const char *name, int32 index, const BMessage *message); 199 status_t ReplaceFlat(const char *name, BFlattenable *object); 200 status_t ReplaceFlat(const char *name, int32 index, BFlattenable *object); 201 status_t ReplaceData(const char *name, type_code type, 202 const void *data, ssize_t numBytes); 203 status_t ReplaceData(const char *name, type_code type, int32 index, 204 const void *data, ssize_t numBytes); 205 206 void *operator new(size_t size); 207 void *operator new(size_t, void *pointer); 208 void operator delete(void *pointer, size_t size); 209 210 // Private, reserved, or obsolete 211 bool HasRect(const char *, int32 n = 0) const; 212 bool HasPoint(const char *, int32 n = 0) const; 213 bool HasString(const char *, int32 n = 0) const; 214 bool HasInt8(const char *, int32 n = 0) const; 215 bool HasInt16(const char *, int32 n = 0) const; 216 bool HasInt32(const char *, int32 n = 0) const; 217 bool HasInt64(const char *, int32 n = 0) const; 218 bool HasBool(const char *, int32 n = 0) const; 219 bool HasFloat(const char *, int32 n = 0) const; 220 bool HasDouble(const char *, int32 n = 0) const; 221 bool HasPointer(const char *, int32 n = 0) const; 222 bool HasMessenger(const char *, int32 n = 0) const; 223 bool HasRef(const char *, int32 n = 0) const; 224 bool HasMessage(const char *, int32 n = 0) const; 225 bool HasFlat(const char *, const BFlattenable *) const; 226 bool HasFlat(const char *, int32 n, const BFlattenable *) const; 227 bool HasData(const char *, type_code , int32 n = 0) const; 228 BRect FindRect(const char *, int32 n = 0) const; 229 BPoint FindPoint(const char *, int32 n = 0) const; 230 const char *FindString(const char *, int32 n = 0) const; 231 int8 FindInt8(const char *, int32 n = 0) const; 232 int16 FindInt16(const char *, int32 n = 0) const; 233 int32 FindInt32(const char *, int32 n = 0) const; 234 int64 FindInt64(const char *, int32 n = 0) const; 235 bool FindBool(const char *, int32 n = 0) const; 236 float FindFloat(const char *, int32 n = 0) const; 237 double FindDouble(const char *, int32 n = 0) const; 238 239 class Private; 240 struct message_header; 241 struct field_header; 242 243 private: 244 friend class Private; 245 friend class BMessageQueue; 246 247 status_t _InitCommon(); 248 status_t _InitHeader(); 249 status_t _Clear(); 250 251 status_t _ResizeData(int32 offset, int32 change); 252 253 uint32 _HashName(const char* name) const; 254 status_t _FindField(const char* name, type_code type, 255 field_header** _result) const; 256 status_t _AddField(const char* name, type_code type, 257 bool isFixedSize, field_header** _result); 258 status_t _RemoveField(field_header* field); 259 260 ssize_t _NativeFlattenedSize() const; 261 status_t _NativeFlatten(char *buffer, ssize_t size) const; 262 status_t _NativeFlatten(BDataIO *stream, ssize_t *size = NULL) const; 263 void _PrintToStream(const char* indent) const; 264 265 private: 266 message_header* fHeader; 267 field_header* fFields; 268 uint8* fData; 269 area_id fClonedArea; 270 271 mutable BMessage* fOriginal; 272 273 BMessage* fQueueLink; 274 // fQueueLink is used by BMessageQueue to build a linked list 275 276 // deprecated 277 BMessage(BMessage *message); 278 279 static void _StaticCacheCleanup(); 280 281 static BBlockCache* sMsgCache; 282 }; 283 284 #endif // _MESSAGE_H 285