1 /* Defs for interface to demanglers. 2 Copyright 1992, 1993, 1994, 1995, 1996, 1997, 1998, 2000, 2001, 2002, 3 2003, 2004, 2005, 2007 Free Software Foundation, Inc. 4 5 This program is free software; you can redistribute it and/or 6 modify it under the terms of the GNU Library General Public License 7 as published by the Free Software Foundation; either version 2, or 8 (at your option) any later version. 9 10 In addition to the permissions in the GNU Library General Public 11 License, the Free Software Foundation gives you unlimited 12 permission to link the compiled version of this file into 13 combinations with other programs, and to distribute those 14 combinations without any restriction coming from the use of this 15 file. (The Library Public License restrictions do apply in other 16 respects; for example, they cover modification of the file, and 17 distribution when not linked into a combined executable.) 18 19 This program is distributed in the hope that it will be useful, but 20 WITHOUT ANY WARRANTY; without even the implied warranty of 21 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 22 Library General Public License for more details. 23 24 You should have received a copy of the GNU Library General Public 25 License along with this program; if not, write to the Free Software 26 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 27 02110-1301, USA. */ 28 29 30 #if !defined (DEMANGLE_H) 31 #define DEMANGLE_H 32 33 #if 0 /* in valgrind */ 34 #include "libiberty.h" 35 #endif /* ! in valgrind */ 36 37 #ifdef __cplusplus 38 extern "C" { 39 #endif /* __cplusplus */ 40 41 /* Options passed to cplus_demangle (in 2nd parameter). */ 42 43 #define DMGL_NO_OPTS 0 /* For readability... */ 44 #define DMGL_PARAMS (1 << 0) /* Include function args */ 45 #define DMGL_ANSI (1 << 1) /* Include const, volatile, etc */ 46 #define DMGL_JAVA (1 << 2) /* Demangle as Java rather than C++. */ 47 #define DMGL_VERBOSE (1 << 3) /* Include implementation details. */ 48 #define DMGL_TYPES (1 << 4) /* Also try to demangle type encodings. */ 49 #define DMGL_RET_POSTFIX (1 << 5) /* Print function return types (when 50 present) after function signature */ 51 52 #define DMGL_AUTO (1 << 8) 53 #define DMGL_GNU (1 << 9) 54 #define DMGL_LUCID (1 << 10) 55 #define DMGL_ARM (1 << 11) 56 #define DMGL_HP (1 << 12) /* For the HP aCC compiler; 57 same as ARM except for 58 template arguments, etc. */ 59 #define DMGL_EDG (1 << 13) 60 #define DMGL_GNU_V3 (1 << 14) 61 #define DMGL_GNAT (1 << 15) 62 63 /* If none of these are set, use 'current_demangling_style' as the default. */ 64 #define DMGL_STYLE_MASK (DMGL_AUTO|DMGL_GNU|DMGL_LUCID|DMGL_ARM|DMGL_HP|DMGL_EDG|DMGL_GNU_V3|DMGL_JAVA|DMGL_GNAT) 65 66 /* Enumeration of possible demangling styles. 67 68 Lucid and ARM styles are still kept logically distinct, even though 69 they now both behave identically. The resulting style is actual the 70 union of both. I.E. either style recognizes both "__pt__" and "__rf__" 71 for operator "->", even though the first is lucid style and the second 72 is ARM style. (FIXME?) */ 73 74 extern enum demangling_styles 75 { 76 no_demangling = -1, 77 unknown_demangling = 0, 78 auto_demangling = DMGL_AUTO, 79 gnu_demangling = DMGL_GNU, 80 lucid_demangling = DMGL_LUCID, 81 arm_demangling = DMGL_ARM, 82 hp_demangling = DMGL_HP, 83 edg_demangling = DMGL_EDG, 84 gnu_v3_demangling = DMGL_GNU_V3, 85 java_demangling = DMGL_JAVA, 86 gnat_demangling = DMGL_GNAT 87 } current_demangling_style; 88 89 /* Define string names for the various demangling styles. */ 90 91 #define NO_DEMANGLING_STYLE_STRING "none" 92 #define AUTO_DEMANGLING_STYLE_STRING "auto" 93 #define GNU_DEMANGLING_STYLE_STRING "gnu" 94 #define LUCID_DEMANGLING_STYLE_STRING "lucid" 95 #define ARM_DEMANGLING_STYLE_STRING "arm" 96 #define HP_DEMANGLING_STYLE_STRING "hp" 97 #define EDG_DEMANGLING_STYLE_STRING "edg" 98 #define GNU_V3_DEMANGLING_STYLE_STRING "gnu-v3" 99 #define JAVA_DEMANGLING_STYLE_STRING "java" 100 #define GNAT_DEMANGLING_STYLE_STRING "gnat" 101 102 /* Some macros to test what demangling style is active. */ 103 104 #define CURRENT_DEMANGLING_STYLE current_demangling_style 105 #define AUTO_DEMANGLING (((int) CURRENT_DEMANGLING_STYLE) & DMGL_AUTO) 106 #define GNU_DEMANGLING (((int) CURRENT_DEMANGLING_STYLE) & DMGL_GNU) 107 #define LUCID_DEMANGLING (((int) CURRENT_DEMANGLING_STYLE) & DMGL_LUCID) 108 #define ARM_DEMANGLING (((int) CURRENT_DEMANGLING_STYLE) & DMGL_ARM) 109 #define HP_DEMANGLING (((int) CURRENT_DEMANGLING_STYLE) & DMGL_HP) 110 #define EDG_DEMANGLING (((int) CURRENT_DEMANGLING_STYLE) & DMGL_EDG) 111 #define GNU_V3_DEMANGLING (((int) CURRENT_DEMANGLING_STYLE) & DMGL_GNU_V3) 112 #define JAVA_DEMANGLING (((int) CURRENT_DEMANGLING_STYLE) & DMGL_JAVA) 113 #define GNAT_DEMANGLING (((int) CURRENT_DEMANGLING_STYLE) & DMGL_GNAT) 114 115 /* Provide information about the available demangle styles. This code is 116 pulled from gdb into libiberty because it is useful to binutils also. */ 117 118 extern const struct demangler_engine 119 { 120 const char *const demangling_style_name; 121 const enum demangling_styles demangling_style; 122 const char *const demangling_style_doc; 123 } libiberty_demanglers[]; 124 125 extern char * 126 ML_(cplus_demangle) (const char *mangled, int options); 127 128 extern int 129 cplus_demangle_opname (const char *opname, char *result, int options); 130 131 extern const char * 132 cplus_mangle_opname (const char *opname, int options); 133 134 /* Note: This sets global state. FIXME if you care about multi-threading. */ 135 136 extern void 137 set_cplus_marker_for_demangling (int ch); 138 139 extern enum demangling_styles 140 cplus_demangle_set_style (enum demangling_styles style); 141 142 extern enum demangling_styles 143 cplus_demangle_name_to_style (const char *name); 144 145 /* Callback typedef for allocation-less demangler interfaces. */ 146 typedef void (*demangle_callbackref) (const char *, size_t, void *); 147 148 /* V3 ABI demangling entry points, defined in cp-demangle.c. Callback 149 variants return non-zero on success, zero on error. char* variants 150 return a string allocated by malloc on success, NULL on error. */ 151 extern int 152 cplus_demangle_v3_callback (const char *mangled, int options, 153 demangle_callbackref callback, void *opaque); 154 155 extern char* 156 cplus_demangle_v3 (const char *mangled, int options); 157 158 extern int 159 java_demangle_v3_callback (const char *mangled, 160 demangle_callbackref callback, void *opaque); 161 162 extern char* 163 java_demangle_v3 (const char *mangled); 164 165 enum gnu_v3_ctor_kinds { 166 gnu_v3_complete_object_ctor = 1, 167 gnu_v3_base_object_ctor, 168 gnu_v3_complete_object_allocating_ctor 169 }; 170 171 /* Return non-zero iff NAME is the mangled form of a constructor name 172 in the G++ V3 ABI demangling style. Specifically, return an `enum 173 gnu_v3_ctor_kinds' value indicating what kind of constructor 174 it is. */ 175 extern enum gnu_v3_ctor_kinds 176 is_gnu_v3_mangled_ctor (const char *name); 177 178 179 enum gnu_v3_dtor_kinds { 180 gnu_v3_deleting_dtor = 1, 181 gnu_v3_complete_object_dtor, 182 gnu_v3_base_object_dtor 183 }; 184 185 /* Return non-zero iff NAME is the mangled form of a destructor name 186 in the G++ V3 ABI demangling style. Specifically, return an `enum 187 gnu_v3_dtor_kinds' value, indicating what kind of destructor 188 it is. */ 189 extern enum gnu_v3_dtor_kinds 190 is_gnu_v3_mangled_dtor (const char *name); 191 192 /* The V3 demangler works in two passes. The first pass builds a tree 193 representation of the mangled name, and the second pass turns the 194 tree representation into a demangled string. Here we define an 195 interface to permit a caller to build their own tree 196 representation, which they can pass to the demangler to get a 197 demangled string. This can be used to canonicalize user input into 198 something which the demangler might output. It could also be used 199 by other demanglers in the future. */ 200 201 /* These are the component types which may be found in the tree. Many 202 component types have one or two subtrees, referred to as left and 203 right (a component type with only one subtree puts it in the left 204 subtree). */ 205 206 enum demangle_component_type 207 { 208 /* A name, with a length and a pointer to a string. */ 209 DEMANGLE_COMPONENT_NAME, 210 /* A qualified name. The left subtree is a class or namespace or 211 some such thing, and the right subtree is a name qualified by 212 that class. */ 213 DEMANGLE_COMPONENT_QUAL_NAME, 214 /* A local name. The left subtree describes a function, and the 215 right subtree is a name which is local to that function. */ 216 DEMANGLE_COMPONENT_LOCAL_NAME, 217 /* A typed name. The left subtree is a name, and the right subtree 218 describes that name as a function. */ 219 DEMANGLE_COMPONENT_TYPED_NAME, 220 /* A template. The left subtree is a template name, and the right 221 subtree is a template argument list. */ 222 DEMANGLE_COMPONENT_TEMPLATE, 223 /* A template parameter. This holds a number, which is the template 224 parameter index. */ 225 DEMANGLE_COMPONENT_TEMPLATE_PARAM, 226 /* A constructor. This holds a name and the kind of 227 constructor. */ 228 DEMANGLE_COMPONENT_CTOR, 229 /* A destructor. This holds a name and the kind of destructor. */ 230 DEMANGLE_COMPONENT_DTOR, 231 /* A vtable. This has one subtree, the type for which this is a 232 vtable. */ 233 DEMANGLE_COMPONENT_VTABLE, 234 /* A VTT structure. This has one subtree, the type for which this 235 is a VTT. */ 236 DEMANGLE_COMPONENT_VTT, 237 /* A construction vtable. The left subtree is the type for which 238 this is a vtable, and the right subtree is the derived type for 239 which this vtable is built. */ 240 DEMANGLE_COMPONENT_CONSTRUCTION_VTABLE, 241 /* A typeinfo structure. This has one subtree, the type for which 242 this is the tpeinfo structure. */ 243 DEMANGLE_COMPONENT_TYPEINFO, 244 /* A typeinfo name. This has one subtree, the type for which this 245 is the typeinfo name. */ 246 DEMANGLE_COMPONENT_TYPEINFO_NAME, 247 /* A typeinfo function. This has one subtree, the type for which 248 this is the tpyeinfo function. */ 249 DEMANGLE_COMPONENT_TYPEINFO_FN, 250 /* A thunk. This has one subtree, the name for which this is a 251 thunk. */ 252 DEMANGLE_COMPONENT_THUNK, 253 /* A virtual thunk. This has one subtree, the name for which this 254 is a virtual thunk. */ 255 DEMANGLE_COMPONENT_VIRTUAL_THUNK, 256 /* A covariant thunk. This has one subtree, the name for which this 257 is a covariant thunk. */ 258 DEMANGLE_COMPONENT_COVARIANT_THUNK, 259 /* A Java class. This has one subtree, the type. */ 260 DEMANGLE_COMPONENT_JAVA_CLASS, 261 /* A guard variable. This has one subtree, the name for which this 262 is a guard variable. */ 263 DEMANGLE_COMPONENT_GUARD, 264 /* A reference temporary. This has one subtree, the name for which 265 this is a temporary. */ 266 DEMANGLE_COMPONENT_REFTEMP, 267 /* A hidden alias. This has one subtree, the encoding for which it 268 is providing alternative linkage. */ 269 DEMANGLE_COMPONENT_HIDDEN_ALIAS, 270 /* A standard substitution. This holds the name of the 271 substitution. */ 272 DEMANGLE_COMPONENT_SUB_STD, 273 /* The restrict qualifier. The one subtree is the type which is 274 being qualified. */ 275 DEMANGLE_COMPONENT_RESTRICT, 276 /* The volatile qualifier. The one subtree is the type which is 277 being qualified. */ 278 DEMANGLE_COMPONENT_VOLATILE, 279 /* The const qualifier. The one subtree is the type which is being 280 qualified. */ 281 DEMANGLE_COMPONENT_CONST, 282 /* The restrict qualifier modifying a member function. The one 283 subtree is the type which is being qualified. */ 284 DEMANGLE_COMPONENT_RESTRICT_THIS, 285 /* The volatile qualifier modifying a member function. The one 286 subtree is the type which is being qualified. */ 287 DEMANGLE_COMPONENT_VOLATILE_THIS, 288 /* The const qualifier modifying a member function. The one subtree 289 is the type which is being qualified. */ 290 DEMANGLE_COMPONENT_CONST_THIS, 291 /* A vendor qualifier. The left subtree is the type which is being 292 qualified, and the right subtree is the name of the 293 qualifier. */ 294 DEMANGLE_COMPONENT_VENDOR_TYPE_QUAL, 295 /* A pointer. The one subtree is the type which is being pointed 296 to. */ 297 DEMANGLE_COMPONENT_POINTER, 298 /* A reference. The one subtree is the type which is being 299 referenced. */ 300 DEMANGLE_COMPONENT_REFERENCE, 301 /* C++0x: An rvalue reference. The one subtree is the type which is 302 being referenced. */ 303 DEMANGLE_COMPONENT_RVALUE_REFERENCE, 304 /* A complex type. The one subtree is the base type. */ 305 DEMANGLE_COMPONENT_COMPLEX, 306 /* An imaginary type. The one subtree is the base type. */ 307 DEMANGLE_COMPONENT_IMAGINARY, 308 /* A builtin type. This holds the builtin type information. */ 309 DEMANGLE_COMPONENT_BUILTIN_TYPE, 310 /* A vendor's builtin type. This holds the name of the type. */ 311 DEMANGLE_COMPONENT_VENDOR_TYPE, 312 /* A function type. The left subtree is the return type. The right 313 subtree is a list of ARGLIST nodes. Either or both may be 314 NULL. */ 315 DEMANGLE_COMPONENT_FUNCTION_TYPE, 316 /* An array type. The left subtree is the dimension, which may be 317 NULL, or a string (represented as DEMANGLE_COMPONENT_NAME), or an 318 expression. The right subtree is the element type. */ 319 DEMANGLE_COMPONENT_ARRAY_TYPE, 320 /* A pointer to member type. The left subtree is the class type, 321 and the right subtree is the member type. CV-qualifiers appear 322 on the latter. */ 323 DEMANGLE_COMPONENT_PTRMEM_TYPE, 324 /* An argument list. The left subtree is the current argument, and 325 the right subtree is either NULL or another ARGLIST node. */ 326 DEMANGLE_COMPONENT_ARGLIST, 327 /* A template argument list. The left subtree is the current 328 template argument, and the right subtree is either NULL or 329 another TEMPLATE_ARGLIST node. */ 330 DEMANGLE_COMPONENT_TEMPLATE_ARGLIST, 331 /* An operator. This holds information about a standard 332 operator. */ 333 DEMANGLE_COMPONENT_OPERATOR, 334 /* An extended operator. This holds the number of arguments, and 335 the name of the extended operator. */ 336 DEMANGLE_COMPONENT_EXTENDED_OPERATOR, 337 /* A typecast, represented as a unary operator. The one subtree is 338 the type to which the argument should be cast. */ 339 DEMANGLE_COMPONENT_CAST, 340 /* A unary expression. The left subtree is the operator, and the 341 right subtree is the single argument. */ 342 DEMANGLE_COMPONENT_UNARY, 343 /* A binary expression. The left subtree is the operator, and the 344 right subtree is a BINARY_ARGS. */ 345 DEMANGLE_COMPONENT_BINARY, 346 /* Arguments to a binary expression. The left subtree is the first 347 argument, and the right subtree is the second argument. */ 348 DEMANGLE_COMPONENT_BINARY_ARGS, 349 /* A trinary expression. The left subtree is the operator, and the 350 right subtree is a TRINARY_ARG1. */ 351 DEMANGLE_COMPONENT_TRINARY, 352 /* Arguments to a trinary expression. The left subtree is the first 353 argument, and the right subtree is a TRINARY_ARG2. */ 354 DEMANGLE_COMPONENT_TRINARY_ARG1, 355 /* More arguments to a trinary expression. The left subtree is the 356 second argument, and the right subtree is the third argument. */ 357 DEMANGLE_COMPONENT_TRINARY_ARG2, 358 /* A literal. The left subtree is the type, and the right subtree 359 is the value, represented as a DEMANGLE_COMPONENT_NAME. */ 360 DEMANGLE_COMPONENT_LITERAL, 361 /* A negative literal. Like LITERAL, but the value is negated. 362 This is a minor hack: the NAME used for LITERAL points directly 363 to the mangled string, but since negative numbers are mangled 364 using 'n' instead of '-', we want a way to indicate a negative 365 number which involves neither modifying the mangled string nor 366 allocating a new copy of the literal in memory. */ 367 DEMANGLE_COMPONENT_LITERAL_NEG, 368 /* A libgcj compiled resource. The left subtree is the name of the 369 resource. */ 370 DEMANGLE_COMPONENT_JAVA_RESOURCE, 371 /* A name formed by the concatenation of two parts. The left 372 subtree is the first part and the right subtree the second. */ 373 DEMANGLE_COMPONENT_COMPOUND_NAME, 374 /* A name formed by a single character. */ 375 DEMANGLE_COMPONENT_CHARACTER, 376 /* A decltype type. */ 377 DEMANGLE_COMPONENT_DECLTYPE, 378 /* A pack expansion. */ 379 DEMANGLE_COMPONENT_PACK_EXPANSION 380 }; 381 382 /* Types which are only used internally. */ 383 384 struct demangle_operator_info; 385 struct demangle_builtin_type_info; 386 387 /* A node in the tree representation is an instance of a struct 388 demangle_component. Note that the field names of the struct are 389 not well protected against macros defined by the file including 390 this one. We can fix this if it ever becomes a problem. */ 391 392 struct demangle_component 393 { 394 /* The type of this component. */ 395 enum demangle_component_type type; 396 397 union 398 { 399 /* For DEMANGLE_COMPONENT_NAME. */ 400 struct 401 { 402 /* A pointer to the name (which need not NULL terminated) and 403 its length. */ 404 const char *s; 405 int len; 406 } s_name; 407 408 /* For DEMANGLE_COMPONENT_OPERATOR. */ 409 struct 410 { 411 /* Operator. */ 412 const struct demangle_operator_info *op; 413 } s_operator; 414 415 /* For DEMANGLE_COMPONENT_EXTENDED_OPERATOR. */ 416 struct 417 { 418 /* Number of arguments. */ 419 int args; 420 /* Name. */ 421 struct demangle_component *name; 422 } s_extended_operator; 423 424 /* For DEMANGLE_COMPONENT_CTOR. */ 425 struct 426 { 427 /* Kind of constructor. */ 428 enum gnu_v3_ctor_kinds kind; 429 /* Name. */ 430 struct demangle_component *name; 431 } s_ctor; 432 433 /* For DEMANGLE_COMPONENT_DTOR. */ 434 struct 435 { 436 /* Kind of destructor. */ 437 enum gnu_v3_dtor_kinds kind; 438 /* Name. */ 439 struct demangle_component *name; 440 } s_dtor; 441 442 /* For DEMANGLE_COMPONENT_BUILTIN_TYPE. */ 443 struct 444 { 445 /* Builtin type. */ 446 const struct demangle_builtin_type_info *type; 447 } s_builtin; 448 449 /* For DEMANGLE_COMPONENT_SUB_STD. */ 450 struct 451 { 452 /* Standard substitution string. */ 453 const char* string; 454 /* Length of string. */ 455 int len; 456 } s_string; 457 458 /* For DEMANGLE_COMPONENT_TEMPLATE_PARAM. */ 459 struct 460 { 461 /* Template parameter index. */ 462 long number; 463 } s_number; 464 465 /* For DEMANGLE_COMPONENT_CHARACTER. */ 466 struct 467 { 468 int character; 469 } s_character; 470 471 /* For other types. */ 472 struct 473 { 474 /* Left (or only) subtree. */ 475 struct demangle_component *left; 476 /* Right subtree. */ 477 struct demangle_component *right; 478 } s_binary; 479 480 } u; 481 }; 482 483 /* People building mangled trees are expected to allocate instances of 484 struct demangle_component themselves. They can then call one of 485 the following functions to fill them in. */ 486 487 /* Fill in most component types with a left subtree and a right 488 subtree. Returns non-zero on success, zero on failure, such as an 489 unrecognized or inappropriate component type. */ 490 491 extern int 492 cplus_demangle_fill_component (struct demangle_component *fill, 493 enum demangle_component_type, 494 struct demangle_component *left, 495 struct demangle_component *right); 496 497 /* Fill in a DEMANGLE_COMPONENT_NAME. Returns non-zero on success, 498 zero for bad arguments. */ 499 500 extern int 501 cplus_demangle_fill_name (struct demangle_component *fill, 502 const char *, int); 503 504 /* Fill in a DEMANGLE_COMPONENT_BUILTIN_TYPE, using the name of the 505 builtin type (e.g., "int", etc.). Returns non-zero on success, 506 zero if the type is not recognized. */ 507 508 extern int 509 cplus_demangle_fill_builtin_type (struct demangle_component *fill, 510 const char *type_name); 511 512 /* Fill in a DEMANGLE_COMPONENT_OPERATOR, using the name of the 513 operator and the number of arguments which it takes (the latter is 514 used to disambiguate operators which can be both binary and unary, 515 such as '-'). Returns non-zero on success, zero if the operator is 516 not recognized. */ 517 518 extern int 519 cplus_demangle_fill_operator (struct demangle_component *fill, 520 const char *opname, int args); 521 522 /* Fill in a DEMANGLE_COMPONENT_EXTENDED_OPERATOR, providing the 523 number of arguments and the name. Returns non-zero on success, 524 zero for bad arguments. */ 525 526 extern int 527 cplus_demangle_fill_extended_operator (struct demangle_component *fill, 528 int numargs, 529 struct demangle_component *nm); 530 531 /* Fill in a DEMANGLE_COMPONENT_CTOR. Returns non-zero on success, 532 zero for bad arguments. */ 533 534 extern int 535 cplus_demangle_fill_ctor (struct demangle_component *fill, 536 enum gnu_v3_ctor_kinds kind, 537 struct demangle_component *name); 538 539 /* Fill in a DEMANGLE_COMPONENT_DTOR. Returns non-zero on success, 540 zero for bad arguments. */ 541 542 extern int 543 cplus_demangle_fill_dtor (struct demangle_component *fill, 544 enum gnu_v3_dtor_kinds kind, 545 struct demangle_component *name); 546 547 /* This function translates a mangled name into a struct 548 demangle_component tree. The first argument is the mangled name. 549 The second argument is DMGL_* options. This returns a pointer to a 550 tree on success, or NULL on failure. On success, the third 551 argument is set to a block of memory allocated by malloc. This 552 block should be passed to free when the tree is no longer 553 needed. */ 554 555 extern struct demangle_component * 556 cplus_demangle_v3_components (const char *mangled, int options, void **mem); 557 558 /* This function takes a struct demangle_component tree and returns 559 the corresponding demangled string. The first argument is DMGL_* 560 options. The second is the tree to demangle. The third is a guess 561 at the length of the demangled string, used to initially allocate 562 the return buffer. The fourth is a pointer to a size_t. On 563 success, this function returns a buffer allocated by malloc(), and 564 sets the size_t pointed to by the fourth argument to the size of 565 the allocated buffer (not the length of the returned string). On 566 failure, this function returns NULL, and sets the size_t pointed to 567 by the fourth argument to 0 for an invalid tree, or to 1 for a 568 memory allocation error. */ 569 570 extern char * 571 cplus_demangle_print (int options, 572 const struct demangle_component *tree, 573 int estimated_length, 574 size_t *p_allocated_size); 575 576 /* This function takes a struct demangle_component tree and passes back 577 a demangled string in one or more calls to a callback function. 578 The first argument is DMGL_* options. The second is the tree to 579 demangle. The third is a pointer to a callback function; on each call 580 this receives an element of the demangled string, its length, and an 581 opaque value. The fourth is the opaque value passed to the callback. 582 The callback is called once or more to return the full demangled 583 string. The demangled element string is always nul-terminated, though 584 its length is also provided for convenience. In contrast to 585 cplus_demangle_print(), this function does not allocate heap memory 586 to grow output strings (except perhaps where alloca() is implemented 587 by malloc()), and so is normally safe for use where the heap has been 588 corrupted. On success, this function returns 1; on failure, 0. */ 589 590 extern int 591 cplus_demangle_print_callback (int options, 592 const struct demangle_component *tree, 593 demangle_callbackref callback, void *opaque); 594 595 #ifdef __cplusplus 596 } 597 #endif /* __cplusplus */ 598 599 #endif /* DEMANGLE_H */ 600
