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glib/gtypelib.h
Colin Walters 46d9ef151e Support (out caller-allocates) 
People have wanted support for marking (out) on functions of the
form:

/**
 * clutter_color_from_pixel:
 * @pixel: A pixel
 * @color: (out): Color to initialize with value of @pixel
 */
void
clutter_color_from_pixel (guint32 pixel, ClutterColor *color);

Where the caller is supposed to have allocated the argument; the
C function just initializes it.  This patch adds support for this
argument passing style to introspection.  In this case, we see the
(out), and notice that there's only a single indirection (*) on
the argument, and assume that this means (out caller-allocates).

https://bugzilla.gnome.org/show_bug.cgi?id=604749
2010-05-26 13:00:56 -04:00

1109 lines
33 KiB
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/* GObject introspection: struct definitions for the binary
* typelib format, validation
*
* Copyright (C) 2005 Matthias Clasen
* Copyright (C) 2008,2009 Red Hat, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifndef __G_TYPELIB_H__
#define __G_TYPELIB_H__
#include <gmodule.h>
#include "girepository.h"
G_BEGIN_DECLS
/**
* SECTION:gtypelib
* @short_description: Layout and accessors for typelib
* @stability: Stable
*
* The "typelib" is a binary, readonly, memory-mappable database
* containing reflective information about a GObject library.
*
* The format of GObject typelib is strongly influenced by the Mozilla XPCOM
* format.
*
* Some of the differences to XPCOM include:
* - Type information is stored not quite as compactly (XPCOM stores it inline
* in function descriptions in variable-sized blobs of 1 to n bytes. We store
* 16 bits of type information for each parameter, which is enough to encode
* simple types inline. Complex (e.g. recursive) types are stored out of line
* in a separate list of types.
* - String and complex type data is stored outside of typelib entry blobs,
* references are stored as offsets relative to the start of the typelib.
* One possibility is to store the strings and types in a pools at the end
* of the typelib.
*
* The typelib has the following general format.
*
* typelib ::= header, directory, blobs, attributes, attributedata
*
* directory ::= list of entries
*
* entry ::= blob type, name, namespace, offset
* blob ::= function|callback|struct|boxed|enum|flags|object|interface|constant|errordomain|union
* attributes ::= list of attributes, sorted by offset
* attribute ::= offset, key, value
* attributedata ::= string data for attributes
*
* Details
*
* We describe the fragments that make up the typelib in the form of C structs
* (although some fall short of being valid C structs since they contain multiple
* flexible arrays).
*/
/*
TYPELIB HISTORY
-----
Version 1.0
- Rename class_struct to gtype_struct, add to interfaces
Changes since 0.9:
- Add padding to structures
Changes since 0.8:
- Add class struct concept to ObjectBlob
- Add is_class_struct bit to StructBlob
Changes since 0.7:
- Add dependencies
Changes since 0.6:
- rename metadata to typelib, to follow xpcom terminology
Changes since 0.5:
- basic type cleanup:
+ remove GString
+ add [u]int, [u]long, [s]size_t
+ rename string to utf8, add filename
- allow blob_type to be zero for non-local entries
Changes since 0.4:
- add a UnionBlob
Changes since 0.3:
- drop short_name for ValueBlob
Changes since 0.2:
- make inline types 4 bytes after all, remove header->types and allow
types to appear anywhere
- allow error domains in the directory
Changes since 0.1:
- drop comments about _GOBJ_METADATA
- drop string pool, strings can appear anywhere
- use 'blob' as collective name for the various blob types
- rename 'type' field in blobs to 'blob_type'
- rename 'type_name' and 'type_init' fields to 'gtype_name', 'gtype_init'
- shrink directory entries to 12 bytes
- merge struct and boxed blobs
- split interface blobs into enum, object and interface blobs
- add an 'unregistered' flag to struct and enum blobs
- add a 'wraps_vfunc' flag to function blobs and link them to
the vfuncs they wrap
- restrict value blobs to only occur inside enums and flags again
- add constant blobs, allow them toplevel, in interfaces and in objects
- rename 'receiver_owns_value' and 'receiver_owns_container' to
'transfer_ownership' and 'transfer_container_ownership'
- add a 'struct_offset' field to virtual function and field blobs
- add 'dipper' and 'optional' flags to arg blobs
- add a 'true_stops_emit' flag to signal blobs
- add variable blob sizes to header
- store offsets to signature blobs instead of including them directly
- change the type offset to be measured in words rather than bytes
*/
/**
* G_IR_MAGIC:
*
* Identifying prefix for the typelib. This was inspired by XPCOM,
* which in turn borrowed from PNG.
*/
#define G_IR_MAGIC "GOBJ\nMETADATA\r\n\032"
/**
* GTypelibBlobType:
* @BLOB_TYPE_INVALID: Should not appear in code
* @BLOB_TYPE_FUNCTION: A #FunctionBlob
* @BLOB_TYPE_CALLBACK: A #CallbackBlob
* @BLOB_TYPE_STRUCT: A #StructBlob
* @BLOB_TYPE_BOXED: Can be either a #StructBlob or #UnionBlob
* @BLOB_TYPE_ENUM: An #EnumBlob
* @BLOB_TYPE_FLAGS: An #EnumBlob
* @BLOB_TYPE_OBJECT: An #ObjectBlob
* @BLOB_TYPE_INTERFACE: An #InterfaceBlob
* @BLOB_TYPE_CONSTANT: A #ConstantBlob
* @BLOB_TYPE_ERROR_DOMAIN: A #ErrorDomainBlob
* @BLOB_TYPE_UNION: A #UnionBlob
*
* The integral value of this enumeration appears in each "Blob"
* component of a typelib to identify its type.
*/
typedef enum {
BLOB_TYPE_INVALID,
BLOB_TYPE_FUNCTION,
BLOB_TYPE_CALLBACK,
BLOB_TYPE_STRUCT,
BLOB_TYPE_BOXED,
BLOB_TYPE_ENUM,
BLOB_TYPE_FLAGS,
BLOB_TYPE_OBJECT,
BLOB_TYPE_INTERFACE,
BLOB_TYPE_CONSTANT,
BLOB_TYPE_ERROR_DOMAIN,
BLOB_TYPE_UNION
} GTypelibBlobType;
#define BLOB_IS_REGISTERED_TYPE(blob) \
((blob)->blob_type == BLOB_TYPE_STRUCT || \
(blob)->blob_type == BLOB_TYPE_UNION || \
(blob)->blob_type == BLOB_TYPE_ENUM || \
(blob)->blob_type == BLOB_TYPE_OBJECT || \
(blob)->blob_type == BLOB_TYPE_INTERFACE)
/**
* Header:
* @magic: See #G_IR_MAGIC.
* @major_version: The version of the typelib format. Minor version changes indicate
* compatible changes and should still allow the typelib to be parsed
* by a parser designed for the same major_version.
* @minor_version: See major_version.
* @n_entries: The number of entries in the directory.
* @n_local_entries: The number of entries referring to blobs in this typelib. The
* local entries must occur before the unresolved entries.
* @directory: Offset of the directory in the typelib.
* @n_attributes: Number of attribute blocks
* @attributes: Offset of the list of attributes in the typelib.
* @dependencies: Offset of a single string, which is the list of
* dependencies, separated by the '|' character. The
* dependencies are required in order to avoid having programs
* consuming a typelib check for an "Unresolved" type return
* from every API call.
* @size: The size in bytes of the typelib.
* @namespace: Offset of the namespace string in the typelib.
* @nsversion: Offset of the namespace version string in the typelib.
* @shared_library: This field is the set of shared libraries associated
* with the typelib. The entries are separated by the '|' (pipe) character.
* @c_prefix: The prefix for the function names of the library
* @entry_blob_size: The sizes of fixed-size blobs. Recording this information here
* allows to write parser which continue to work if the format is
* extended by adding new fields to the end of the fixed-size blobs.
* @function_blob_size: See above.
* @callback_blob_size: See above.
* @signal_blob_size: See above.
* @vfunc_blob_size: See above.
* @arg_blob_size: See above.
* @property_blob_size: See above.
* @field_blob_size: See above.
* @value_blob_size: See above.
* @attribute_blob_size: See above.
* @constant_blob_size: See above.
* @object_blob_size: See above.
* @union_blob_size: See above.
* @signature_blob_size: See above.
* @enum_blob_size: See above.
* @struct_blob_size: See above.
* @error_domain_blob_size: See above.
* @interface_blob_size: For variable-size blobs, the size of the struct up to the first
* flexible array member. Recording this information here allows to
* write parser which continue to work if the format is extended by
* adding new fields before the first flexible array member in
* variable-size blobs.
*
* The header structure appears exactly once at the beginning of a typelib. It is a
* collection of meta-information, such as the number of entries and dependencies.
*/
typedef struct {
gchar magic[16];
guint8 major_version;
guint8 minor_version;
/* <private> */
guint16 reserved;
/* <public> */
guint16 n_entries;
guint16 n_local_entries;
guint32 directory;
guint32 n_attributes;
guint32 attributes;
guint32 dependencies;
guint32 size;
guint32 namespace;
guint32 nsversion;
guint32 shared_library;
guint32 c_prefix;
guint16 entry_blob_size;
guint16 function_blob_size;
guint16 callback_blob_size;
guint16 signal_blob_size;
guint16 vfunc_blob_size;
guint16 arg_blob_size;
guint16 property_blob_size;
guint16 field_blob_size;
guint16 value_blob_size;
guint16 attribute_blob_size;
guint16 constant_blob_size;
guint16 error_domain_blob_size;
guint16 signature_blob_size;
guint16 enum_blob_size;
guint16 struct_blob_size;
guint16 object_blob_size;
guint16 interface_blob_size;
guint16 union_blob_size;
/* <private> */
guint16 padding[7];
} Header;
/**
* DirEntry:
* @blob_type: A #GTypelibBlobType
* @local: Whether this entry refers to a blob in this typelib.
* @name: The name of the entry.
* @offset: If is_local is set, this is the offset of the blob in the typelib.
* Otherwise, it is the offset of the namespace in which the blob has
* to be looked up by name.
*
* References to directory entries are stored as 1-based 16-bit indexes.
*
* All blobs pointed to by a directory entry start with the same layout for
* the first 8 bytes (the reserved flags may be used by some blob types)
*/
typedef struct {
guint16 blob_type;
guint16 local : 1;
/* <private> */
guint16 reserved :15;
/* <public> */
guint32 name;
guint32 offset;
} DirEntry;
/**
* SimpleTypeBlob:
* @is_pointer: Indicates whether the type is passed by reference.
* @tag: A #GITypeTag
* @offset: Offset relative to header->types that points to a TypeBlob.
* Unlike other offsets, this is in words (ie 32bit units) rather
* than bytes.
*
* The SimpleTypeBlob is the general purpose "reference to a type" construct, used
* in method parameters, returns, callback definitions, fields, constants, etc.
* It's actually just a 32 bit integer which you can see from the union definition.
* This is for efficiency reasons, since there are so many references to types.
*
* SimpleTypeBlob is divided into two cases; first, if "reserved" and "reserved2", the
* type tag for a basic type is embedded in the "tag" bits. This allows e.g.
* GI_TYPE_TAG_UTF8, GI_TYPE_TAG_INT and the like to be embedded directly without
* taking up extra space.
*
* References to "interfaces" (objects, interfaces) are more complicated; In this case,
* the integer is actually an offset into the directory (see above). Because the header
* is larger than 2^8=256 bits, all offsets will have one of the upper 24 bits set.
*/
typedef union
{
struct
{
/* <private> */
guint reserved : 8;
guint reserved2 :16;
/* <public> */
guint pointer : 1;
/* <private> */
guint reserved3 : 2;
/* <public> */
guint tag : 5;
} flags;
guint32 offset;
} SimpleTypeBlob;
/**
* ArgBlob:
* @name: A suggested name for the parameter.
* @in: The parameter is an input to the function
* @out: The parameter is used to return an output of the function.
* Parameters can be both in and out. Out parameters implicitly
* add another level of indirection to the parameter type. Ie if
* the type is uint32 in an out parameter, the function actually
* takes an uint32*.
* @caller_allocates: The parameter is a pointer to a struct or object that will
* receive an output of the function.
* @allow_none: Only meaningful for types which are passed as pointers.
* For an in parameter, indicates if it is ok to pass NULL in, for
* an out parameter, whether it may return NULL. Note that NULL is a
* valid GList and GSList value, thus allow_none will normally be set
* for parameters of these types.
* @optional: For an out parameter, indicates that NULL may be passed in
* if the value is not needed.
* @transfer_ownership: For an in parameter, indicates that the function takes over
* ownership of the parameter value. For an out parameter, it
* indicates that the caller is responsible for freeing the return
* value.
* @transfer_container_ownership: For container types, indicates that the
* ownership of the container, but not of its contents is transferred. This is typically the case
* for out parameters returning lists of statically allocated things.
* @return_value: The parameter should be considered the return value of the function.
* Only out parameters can be marked as return value, and there can be
* at most one per function call. If an out parameter is marked as
* return value, the actual return value of the function should be
* either void or a boolean indicating the success of the call.
* @scope: A #GIScopeType. If the parameter is of a callback type, this denotes the scope
* of the user_data and the callback function pointer itself
* (for languages that emit code at run-time).
* @closure: Index of the closure (user_data) parameter associated with the callback,
* or -1.
* @destroy: Index of the destroy notfication callback parameter associated with
* the callback, or -1.
* @arg_type: Describes the type of the parameter. See details below.
*
* Types are specified by four bytes. If the three high bytes are zero,
* the low byte describes a basic type, otherwise the 32bit number is an
* offset which points to a TypeBlob.
*/
typedef struct {
guint32 name;
guint in : 1;
guint out : 1;
guint caller_allocates : 1;
guint allow_none : 1;
guint optional : 1;
guint transfer_ownership : 1;
guint transfer_container_ownership : 1;
guint return_value : 1;
guint scope : 3;
/* <private> */
guint reserved :21;
gint8 closure;
gint8 destroy;
SimpleTypeBlob arg_type;
} ArgBlob;
/**
* SignatureBlob:
* @return_type: Describes the type of the return value. See details below.
* @may_return_null: Only relevant for pointer types. Indicates whether the caller
* must expect NULL as a return value.
* @caller_owns_return_value: If set, the caller is responsible for freeing the return value
* if it is no longer needed.
* @caller_owns_return_container: This flag is only relevant if the return type is a container type.
* If the flag is set, the caller is resonsible for freeing the
* container, but not its contents.
* @n_arguments: The number of arguments that this function expects, also the length
* of the array of ArgBlobs.
* @arguments: An array of ArgBlob for the arguments of the function.
*/
typedef struct {
SimpleTypeBlob return_type;
guint16 may_return_null : 1;
guint16 caller_owns_return_value : 1;
guint16 caller_owns_return_container : 1;
guint16 reserved :13;
guint16 n_arguments;
ArgBlob arguments[];
} SignatureBlob;
/**
* CommonBlob:
* @blob_type: A #GTypelibBlobType
* @deprecated: Whether the blob is deprecated.
* @name: The name of the blob.
*
* The #CommonBlob is shared between #FunctionBlob,
* #CallbackBlob, #SignalBlob.
*/
typedef struct {
guint16 blob_type; /* 1 */
guint16 deprecated : 1;
/* <private> */
guint16 reserved :15;
/* <public> */
guint32 name;
} CommonBlob;
/**
* FunctionBlob:
* @blob_Type: #BLOB_TYPE_FUNCTION
* @symbol: The symbol which can be used to obtain the function pointer with
* dlsym().
* @deprecated: The function is deprecated.
* @setter: The function is a setter for a property. Language bindings may
* prefer to not bind individual setters and rely on the generic
* g_object_set().
* @getter: The function is a getter for a property. Language bindings may
* prefer to not bind individual getters and rely on the generic
* g_object_get().
* @constructor:The function acts as a constructor for the object it is contained
* in.
* @wraps_vfunc: The function is a simple wrapper for a virtual function.
* @index: Index of the property that this function is a setter or getter of
* in the array of properties of the containing interface, or index
* of the virtual function that this function wraps.
* @signature: Offset of the SignatureBlob describing the parameter types and the
* return value type.
* @is_static: The function is a "static method"; in other words it's a pure
* function whose name is conceptually scoped to the object.
*/
typedef struct {
guint16 blob_type; /* 1 */
guint16 deprecated : 1;
guint16 setter : 1;
guint16 getter : 1;
guint16 constructor : 1;
guint16 wraps_vfunc : 1;
guint16 throws : 1;
guint16 index :10;
/* Note the bits above need to match CommonBlob
* and are thus exhausted, extend things using
* the reserved block below. */
guint32 name;
guint32 symbol;
guint32 signature;
guint16 is_static : 1;
guint16 reserved : 15;
guint16 reserved2 : 16;
} FunctionBlob;
/**
* CallbackBlob:
* @signature: Offset of the #SignatureBlob describing the parameter types and the
* return value type.
*/
typedef struct {
guint16 blob_type; /* 2 */
guint16 deprecated : 1;
/* <private> */
guint16 reserved :15;
/* <public> */
guint32 name;
guint32 signature;
} CallbackBlob;
/**
* InterfaceTypeBlob:
* @pointer: Whether this type represents an indirection
* @tag: A #GITypeTag
* @interface: Index of the directory entry for the interface.
*
* If the interface is an enum of flags type, is_pointer is 0, otherwise it is 1.
*/
typedef struct {
guint8 pointer :1;
/* <private> */
guint8 reserved :2;
/* <public> */
guint8 tag :5;
/* <private> */
guint8 reserved2;
/* <public> */
guint16 interface;
} InterfaceTypeBlob;
/**
* ArrayTypeBlob:
* @zero_terminated: Indicates that the array must be terminated by a suitable #NULL
* value.
* @has_length: Indicates that length points to a parameter specifying the length
* of the array. If both has_length and zero_terminated are set, the
* convention is to pass -1 for the length if the array is
* zero-terminated.
* @has_size: Indicates that size is the fixed size of the array.
* @array_type: Indicates whether this is a C array, GArray, GPtrArray, or
* GByteArray. If something other than a C array, the length and element size
* are implicit in the structure.
* @length: The index of the parameter which is used to pass the length of the
* array. The parameter must be an integer type and have the same
* direction as this one.
* @size: The fixed size of the array.
* @type: The type of the array elements.
* Arrays are passed by reference, thus is_pointer is always 1.
*/
typedef struct {
guint16 pointer :1;
guint16 reserved :2;
guint16 tag :5;
guint16 zero_terminated :1;
guint16 has_length :1;
guint16 has_size :1;
guint16 array_type :2;
guint16 reserved2 :3;
union {
guint16 length;
guint16 size;
} dimensions;
SimpleTypeBlob type;
} ArrayTypeBlob;
/**
* ParamTypeBlob:
* @n_types: The number of parameter types to follow.
* @type: Describes the type of the list elements.
*
*/
typedef struct {
guint8 pointer :1;
guint8 reserved :2;
guint8 tag :5;
guint8 reserved2;
guint16 n_types;
SimpleTypeBlob type[];
} ParamTypeBlob;
/**
* ErrorTypeBlob:
* @n_domains: The number of domains to follow
* @domains: Indices of the directory entries for the error domains
*/
typedef struct {
guint8 pointer :1;
guint8 reserved :2;
guint8 tag :5;
guint8 reserved2;
guint16 n_domains;
guint16 domains[];
} ErrorTypeBlob;
/**
* ErrorDomainBlob:
* @get_quark: The symbol name of the function which must be called to obtain the
* GQuark for the error domain.
* @error_codes: Index of the InterfaceBlob describing the enumeration which lists
* the possible error codes.
*/
typedef struct {
guint16 blob_type; /* 10 */
guint16 deprecated : 1;
guint16 reserved :15;
guint32 name;
guint32 get_quark;
guint16 error_codes;
guint16 reserved2;
} ErrorDomainBlob;
/**
* ValueBlob:
* @deprecated: Whether this value is deprecated
* @value: The numerical value
* @name: Name of blob
*
* Values commonly occur in enums and flags.
*/
typedef struct {
guint32 deprecated : 1;
/* <private> */
guint32 reserved :31;
/* <public> */
guint32 name;
gint32 value;
} ValueBlob;
/**
* FieldBlob:
* @name: The name of the field.
* @readable:
* @writable: How the field may be accessed.
* @has_embedded_type: An anonymous type follows the FieldBlob.
* @bits: If this field is part of a bitfield, the number of bits which it
* uses, otherwise 0.
* @struct_offset:
* The offset of the field in the struct. The value 0xFFFF indicates
* that the struct offset is unknown.
* @type: The type of the field.
*/
typedef struct {
guint32 name;
guint8 readable :1;
guint8 writable :1;
guint8 has_embedded_type :1;
guint8 reserved :5;
guint8 bits;
guint16 struct_offset;
guint32 reserved2;
SimpleTypeBlob type;
} FieldBlob;
/**
* RegisteredTypeBlob:
* @gtype_name: The name under which the type is registered with GType.
* @gtype_init: The symbol name of the get_type() function which registers the type.
*/
typedef struct {
guint16 blob_type;
guint16 deprecated : 1;
guint16 unregistered : 1;
guint16 reserved :14;
guint32 name;
guint32 gtype_name;
guint32 gtype_init;
} RegisteredTypeBlob;
/**
* StructBlob:
* @blob_type: #BLOB_TYPE_STRUCT
* @deprecated: Whether this structure is deprecated
* @unregistered: If this is set, the type is not registered with GType.
* @alignment: The byte boundary that the struct is aligned to in memory
* @is_gtype_struct: Whether this structure is the class or interface layout for a GObject
* @foreign: If the type is foreign, eg if it's expected to be overridden by
* a native language binding instead of relying of introspected bindings.
* @size: The size of the struct in bytes.
* @gtype_name: String name of the associated #GType
* @gtype_init: String naming the symbol which gets the runtime #GType
* @n_fields:
* @fields: An array of n_fields FieldBlobs.
* should be considered as methods of the struct.
*/
typedef struct {
guint16 blob_type;
guint16 deprecated : 1;
guint16 unregistered : 1;
guint16 is_gtype_struct : 1;
guint16 alignment : 6;
guint16 foreign : 1;
guint16 reserved : 6;
guint32 name;
guint32 gtype_name;
guint32 gtype_init;
guint32 size;
guint16 n_fields;
guint16 n_methods;
guint32 reserved2;
guint32 reserved3;
#if 0
/* variable-length parts of the blob */
FieldBlob fields[];
FunctionBlob methods[];
#endif
} StructBlob;
/**
* UnionBlob:
* @unregistered: If this is set, the type is not registered with GType.
* @discriminated: Is set if the union is discriminated
* @alignment: The byte boundary that the union is aligned to in memory
* @size: The size of the union in bytes.
* @gtype_name: String name of the associated #GType
* @gtype_init: String naming the symbol which gets the runtime #GType
* @n_fields: Length of the arrays
* @discriminator_offset: Offset from the beginning of the union where the
* discriminator of a discriminated union is located.
* The value 0xFFFF indicates that the discriminator offset
* is unknown.
* @discriminator_type: Type of the discriminator
* @fields: Array of FieldBlobs describing the alternative branches of the union
*/
typedef struct {
guint16 blob_type;
guint16 deprecated : 1;
guint16 unregistered : 1;
guint16 discriminated : 1;
guint16 alignment : 6;
guint16 reserved : 7;
guint32 name;
guint32 gtype_name;
guint32 gtype_init;
guint32 size;
guint16 n_fields;
guint16 n_functions;
guint32 reserved2;
guint32 reserved3;
gint32 discriminator_offset;
SimpleTypeBlob discriminator_type;
#if 0
FieldBlob fields[];
FunctionBlob functions[];
ConstantBlob discriminator_values[]
#endif
} UnionBlob;
/**
* EnumBlob:
* @unregistered: If this is set, the type is not registered with GType.
* @storage_type: The tag of the type used for the enum in the C ABI
* (will be a signed or unsigned integral type)
* @gtype_name: String name of the associated #GType
* @gtype_init: String naming the symbol which gets the runtime #GType
* @n_values: The lengths of the values arrays.
* @values: Describes the enum values.
*/
typedef struct {
guint16 blob_type;
guint16 deprecated : 1;
guint16 unregistered : 1;
guint16 storage_type : 5;
guint16 reserved : 9;
guint32 name;
guint32 gtype_name;
guint32 gtype_init;
guint16 n_values;
guint16 reserved2;
guint32 reserved3;
ValueBlob values[];
} EnumBlob;
/**
* PropertyBlob:
* @name: The name of the property.
* @readable:
* @writable:
* @construct:
* @construct_only: The ParamFlags used when registering the property.
* @type: Describes the type of the property.
*/
typedef struct {
guint32 name;
guint32 deprecated : 1;
guint32 readable : 1;
guint32 writable : 1;
guint32 construct : 1;
guint32 construct_only : 1;
guint32 reserved :27;
guint32 reserved2;
SimpleTypeBlob type;
} PropertyBlob;
/**
* SignalBlob:
* @name: The name of the signal.
* @run_first:
* @run_last:
* @run_cleanup:
* @no_recurse:
* @detailed:
* @action:
* @no_hooks: The flags used when registering the signal.
* @has_class_closure: Set if the signal has a class closure.
* @true_stops_emit: Whether the signal has true-stops-emit semantics
* @class_closure: The index of the class closure in the list of virtual functions
* of the object or interface on which the signal is defined.
* @signature: Offset of the SignatureBlob describing the parameter types and the
* return value type.
*/
typedef struct {
guint16 deprecated : 1;
guint16 run_first : 1;
guint16 run_last : 1;
guint16 run_cleanup : 1;
guint16 no_recurse : 1;
guint16 detailed : 1;
guint16 action : 1;
guint16 no_hooks : 1;
guint16 has_class_closure : 1;
guint16 true_stops_emit : 1;
guint16 reserved : 6;
guint16 class_closure;
guint32 name;
guint32 reserved2;
guint32 signature;
} SignalBlob;
/**
* VFuncBlob:
* @name: The name of the virtual function.
* @must_chain_up: If set, every implementation of this virtual function must
* chain up to the implementation of the parent class.
* @must_be_implemented: If set, every derived class must override this virtual function.
* @must_not_be_implemented: If set, derived class must not override this virtual function.
* @class_closure: Set if this virtual function is the class closure of a signal.
* @signal: The index of the signal in the list of signals of the object or
* interface to which this virtual function belongs.
* @struct_offset: The offset of the function pointer in the class struct. The value
* 0xFFFF indicates that the struct offset is unknown.
* @invoker: If a method invoker for this virtual exists, this is the offset in the
* class structure of the method. If no method is known, this value will be 0x3ff.
* @signature:
* Offset of the SignatureBlob describing the parameter types and the
* return value type.
*/
typedef struct {
guint32 name;
guint16 must_chain_up : 1;
guint16 must_be_implemented : 1;
guint16 must_not_be_implemented : 1;
guint16 class_closure : 1;
guint16 reserved :12;
guint16 signal;
guint16 struct_offset;
guint16 invoker : 10; /* Number of bits matches @index in FunctionBlob */
guint16 reserved2 : 6;
guint32 reserved3;
guint32 signature;
} VFuncBlob;
/**
* ObjectBlob:
* @blob_type: #BLOB_TYPE_OBJECT
* @gtype_name: String name of the associated #GType
* @gtype_init: String naming the symbol which gets the runtime #GType
* @parent: The directory index of the parent type. This is only set for
* objects. If an object does not have a parent, it is zero.
* @n_interfaces:
* @n_fields:
* @n_properties:
* @n_methods:
* @n_signals:
* @n_vfuncs:
* @n_constants: The lengths of the arrays.Up to 16bits of padding may be inserted
* between the arrays to ensure that they start on a 32bit boundary.
* @interfaces: An array of indices of directory entries for the implemented
* interfaces.
* @fields: Describes the fields.
* @methods: Describes the methods, constructors, setters and getters.
* @properties: Describes the properties.
* @signals: Describes the signals.
* @vfuncs: Describes the virtual functions.
* @constants: Describes the constants.
*/
typedef struct {
guint16 blob_type; /* 7 */
guint16 deprecated : 1;
guint16 abstract : 1;
guint16 reserved :14;
guint32 name;
guint32 gtype_name;
guint32 gtype_init;
guint16 parent;
guint16 gtype_struct;
guint16 n_interfaces;
guint16 n_fields;
guint16 n_properties;
guint16 n_methods;
guint16 n_signals;
guint16 n_vfuncs;
guint16 n_constants;
guint16 reserved2;
guint32 reserved3;
guint32 reserved4;
guint16 interfaces[];
#if 0
/* variable-length parts of the blob */
FieldBlob fields[];
PropertyBlob properties[];
FunctionBlob methods[];
SignalBlob signals[];
VFuncBlob vfuncs[];
ConstantBlob constants[];
#endif
} ObjectBlob;
/**
* InterfaceBlob:
* @gtype_struct: Name of the interface "class" C structure
* @n_prerequisites: Number of prerequisites
* @n_properties: Number of properties
* @n_methods: Number of methods
* @n_signals: Number of signals
* @n_vfuncs: Number of virtual functions
* @n_constants: The lengths of the arrays.
* Up to 16bits of padding may be inserted between the arrays to ensure that they
* start on a 32bit boundary.
* @prerequisites: An array of indices of directory entries for required interfaces.
* @methods: Describes the methods, constructors, setters and getters.
* @properties: Describes the properties.
* @signals: Describes the signals.
* @vfuncs: Describes the virtual functions.
* @constants: Describes the constants.
*/
typedef struct {
guint16 blob_type;
guint16 deprecated : 1;
guint16 reserved :15;
guint32 name;
guint32 gtype_name;
guint32 gtype_init;
guint16 gtype_struct;
guint16 n_prerequisites;
guint16 n_properties;
guint16 n_methods;
guint16 n_signals;
guint16 n_vfuncs;
guint16 n_constants;
guint32 reserved2;
guint32 reserved3;
guint16 prerequisites[];
#if 0
/* variable-length parts of the blob */
PropertyBlob properties[];
FunctionBlob methods[];
SignalBlob signals[];
VFuncBlob vfuncs[];
ConstantBlob constants[];
#endif
} InterfaceBlob;
/**
* ConstantBlob:
* @type: The type of the value. In most cases this should be a numeric
* type or string.
* @size: The size of the value in bytes.
* @offset: The offset of the value in the typelib.
*/
typedef struct {
guint16 blob_type;
guint16 deprecated : 1;
guint16 reserved :15;
guint32 name;
SimpleTypeBlob type;
guint32 size;
guint32 offset;
guint32 reserved2;
} ConstantBlob;
/**
* AttributeBlob:
* @offset: The offset of the typelib entry to which this attribute refers.
* Attributes are kept sorted by offset, so that the attributes
* of an entry can be found by a binary search.
* @name: The name of the attribute, a string.
* @value: The value of the attribute (also a string)
*/
typedef struct {
guint32 offset;
guint32 name;
guint32 value;
} AttributeBlob;
/**
* GTypelib:
*/
struct _GTypelib {
/* <private> */
guchar *data;
gsize len;
gboolean owns_memory;
GMappedFile *mfile;
GList *modules;
gboolean open_attempted;
};
DirEntry *g_typelib_get_dir_entry (GTypelib *typelib,
guint16 index);
void g_typelib_check_sanity (void);
#define g_typelib_get_string(typelib,offset) ((const gchar*)&(typelib->data)[(offset)])
/**
* GTypelibError:
* @G_TYPELIB_ERROR_INVALID: the typelib is invalid
* @G_TYPELIB_ERROR_INVALID_HEADER: the typelib header is invalid
* @G_TYPELIB_ERROR_INVALID_DIRECTORY: the typelib directory is invalid
* @G_TYPELIB_ERROR_INVALID_ENTRY: a typelib entry is invalid
* @G_TYPELIB_ERROR_INVALID_BLOB: a typelib blob is invalid
*
* A error set while validating the #GTypelib
*/
typedef enum
{
G_TYPELIB_ERROR_INVALID,
G_TYPELIB_ERROR_INVALID_HEADER,
G_TYPELIB_ERROR_INVALID_DIRECTORY,
G_TYPELIB_ERROR_INVALID_ENTRY,
G_TYPELIB_ERROR_INVALID_BLOB
} GTypelibError;
#define G_TYPELIB_ERROR (g_typelib_error_quark ())
GQuark g_typelib_error_quark (void);
gboolean g_typelib_validate (GTypelib *typelib,
GError **error);
G_END_DECLS
#endif /* __G_TYPELIB_H__ */
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