Types — libgccjit v6.1.0 ( ) documentation (original) (raw)
gcc_jit_type¶
gcc_jit_type represents a type within the library.
gcc_jit_object *gcc_jit_type_as_object(gcc_jit_type *type)¶
Upcast a type to an object.
Types can be created in several ways:
- fundamental types can be accessed usinggcc_jit_context_get_type():
gcc_jit_type *int_type = gcc_jit_context_get_type (GCC_JIT_TYPE_INT);
See gcc_jit_context_get_type() for the available types. - derived types can be accessed by using functions such asgcc_jit_type_get_pointer() and gcc_jit_type_get_const():
gcc_jit_type *const_int_star = gcc_jit_type_get_pointer (gcc_jit_type_get_const (int_type));
gcc_jit_type *int_const_star = gcc_jit_type_get_const (gcc_jit_type_get_pointer (int_type)); - by creating structures (see below).
Standard types¶
gcc_jit_type *gcc_jit_context_get_type(gcc_jit_context *ctxt, enum gcc_jit_types type_)¶
Access a specific type. The available types are:
| enum gcc_jit_types value | Meaning |
|---|---|
| GCC_JIT_TYPE_VOID | C’s void type. |
| GCC_JIT_TYPE_VOID_PTR | C’s void *. |
| GCC_JIT_TYPE_BOOL | C++’s bool type; also C99’s_Bool type, aka bool if using stdbool.h. |
| GCC_JIT_TYPE_CHAR | C’s char (of some signedness) |
| GCC_JIT_TYPE_SIGNED_CHAR | C’s signed char |
| GCC_JIT_TYPE_UNSIGNED_CHAR | C’s unsigned char |
| GCC_JIT_TYPE_SHORT | C’s short (signed) |
| GCC_JIT_TYPE_UNSIGNED_SHORT | C’s unsigned short |
| GCC_JIT_TYPE_INT | C’s int (signed) |
| GCC_JIT_TYPE_UNSIGNED_INT | C’s unsigned int |
| GCC_JIT_TYPE_LONG | C’s long (signed) |
| GCC_JIT_TYPE_UNSIGNED_LONG | C’s unsigned long |
| GCC_JIT_TYPE_LONG_LONG | C99’s long long (signed) |
| GCC_JIT_TYPE_UNSIGNED_LONG_LONG | C99’s unsigned long long |
| GCC_JIT_TYPE_FLOAT | |
| GCC_JIT_TYPE_DOUBLE | |
| GCC_JIT_TYPE_LONG_DOUBLE | |
| GCC_JIT_TYPE_CONST_CHAR_PTR | C type: (const char *) |
| GCC_JIT_TYPE_SIZE_T | C’s size_t type |
| GCC_JIT_TYPE_FILE_PTR | C type: (FILE *) |
| GCC_JIT_TYPE_COMPLEX_FLOAT | C99’s _Complex float |
| GCC_JIT_TYPE_COMPLEX_DOUBLE | C99’s _Complex double |
| GCC_JIT_TYPE_COMPLEX_LONG_DOUBLE | C99’s _Complex long double |
gcc_jit_type * gcc_jit_context_get_int_type(gcc_jit_context *ctxt, int num_bytes, int is_signed)¶
Access the integer type of the given size.
Pointers, const, and volatile¶
gcc_jit_type *gcc_jit_type_get_pointer(gcc_jit_type *type)¶
Given type “T”, get type “T*”.
gcc_jit_type *gcc_jit_type_get_const(gcc_jit_type *type)¶
Given type “T”, get type “const T”.
gcc_jit_type *gcc_jit_type_get_volatile(gcc_jit_type *type)¶
Given type “T”, get type “volatile T”.
gcc_jit_type * gcc_jit_context_new_array_type(gcc_jit_context *ctxt, gcc_jit_location *loc, gcc_jit_type *element_type, int num_elements)¶
Given type “T”, get type “T[N]” (for a constant N).
Structures and unions¶
gcc_jit_struct¶
A compound type analagous to a C struct.
gcc_jit_field¶
A field within a gcc_jit_struct.
You can model C struct types by creating gcc_jit_struct * andgcc_jit_field instances, in either order:
- by creating the fields, then the structure. For example, to model:
struct coord {double x; double y; };
you could call:
gcc_jit_field *field_x =
gcc_jit_context_new_field (ctxt, NULL, double_type, "x");
gcc_jit_field *field_y =
gcc_jit_context_new_field (ctxt, NULL, double_type, "y");
gcc_jit_field *fields[2] = {field_x, field_y};
gcc_jit_struct *coord =
gcc_jit_context_new_struct_type (ctxt, NULL, "coord", 2, fields); - by creating the structure, then populating it with fields, typically to allow modelling self-referential structs such as:
struct node { int m_hash; struct node *m_next; };
like this:
gcc_jit_type *node =
gcc_jit_context_new_opaque_struct (ctxt, NULL, "node");
gcc_jit_type *node_ptr =
gcc_jit_type_get_pointer (node);
gcc_jit_field *field_hash =
gcc_jit_context_new_field (ctxt, NULL, int_type, "m_hash");
gcc_jit_field *field_next =
gcc_jit_context_new_field (ctxt, NULL, node_ptr, "m_next");
gcc_jit_field *fields[2] = {field_hash, field_next};
gcc_jit_struct_set_fields (node, NULL, 2, fields);
gcc_jit_field * gcc_jit_context_new_field(gcc_jit_context *ctxt, gcc_jit_location *loc, gcc_jit_type *type, const char *name)¶
Construct a new field, with the given type and name.
The parameter name must be non-NULL. The call takes a copy of the underlying string, so it is valid to pass in a pointer to an on-stack buffer.
gcc_jit_object * gcc_jit_field_as_object(gcc_jit_field *field)¶
Upcast from field to object.
gcc_jit_struct *gcc_jit_context_new_struct_type(gcc_jit_context *ctxt, gcc_jit_location *loc, const char *name, int num_fields, gcc_jit_field **fields)¶
Construct a new struct type, with the given name and fields.
The parameter name must be non-NULL. The call takes a copy of the underlying string, so it is valid to pass in a pointer to an on-stack buffer.
gcc_jit_struct * gcc_jit_context_new_opaque_struct(gcc_jit_context *ctxt, gcc_jit_location *loc, const char *name)¶
Construct a new struct type, with the given name, but without specifying the fields. The fields can be omitted (in which case the size of the struct is not known), or later specified usinggcc_jit_struct_set_fields().
The parameter name must be non-NULL. The call takes a copy of the underlying string, so it is valid to pass in a pointer to an on-stack buffer.
gcc_jit_type * gcc_jit_struct_as_type(gcc_jit_struct *struct_type)¶
Upcast from struct to type.
void gcc_jit_struct_set_fields(gcc_jit_struct *struct_type, gcc_jit_location *loc, int num_fields, gcc_jit_field **fields)¶
Populate the fields of a formerly-opaque struct type.
This can only be called once on a given struct type.
gcc_jit_type * gcc_jit_context_new_union_type(gcc_jit_context *ctxt, gcc_jit_location *loc, const char *name, int num_fields, gcc_jit_field **fields)¶
Construct a new union type, with the given name and fields.
The parameter name must be non-NULL. It is copied, so the input buffer does not need to outlive the call.
Example of use: