mirror of
https://github.com/mpv-player/mpv
synced 2024-12-15 03:15:52 +00:00
8efb2fa21c
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@26061 b3059339-0415-0410-9bf9-f77b7e298cf2
109 lines
3.0 KiB
C
109 lines
3.0 KiB
C
#ifndef MPLAYER_M_STRUCT_H
|
|
#define MPLAYER_M_STRUCT_H
|
|
|
|
/// \defgroup OptionsStruct Options struct
|
|
/// \ingroup Options
|
|
/// An API to manipulate structs using m_option.
|
|
///@{
|
|
|
|
/// \file m_struct.h
|
|
|
|
struct m_option;
|
|
|
|
/// Struct definition
|
|
typedef struct m_struct_st {
|
|
/// For error messages and debugging
|
|
const char* name;
|
|
/// size of the whole struct
|
|
unsigned int size;
|
|
/// Pointer to a struct filled with the default settings
|
|
const void* defaults;
|
|
/// Field list.
|
|
/** The p field of the \ref m_option struct must contain the offset
|
|
* of the member in the struct (use M_ST_OFF macro for this).
|
|
*/
|
|
const struct m_option* fields;
|
|
} m_struct_t;
|
|
|
|
|
|
// From glib.h (modified ;-)
|
|
|
|
/// Get the offset of a struct field.
|
|
/** \param struct_type Struct type.
|
|
* \param member Name of the field.
|
|
* \return The offset of the field in bytes.
|
|
*/
|
|
#define M_ST_OFF(struct_type, member) \
|
|
((void*) &((struct_type*) 0)->member)
|
|
|
|
/// Get a pointer to a struct field.
|
|
/** \param struct_p Pointer to the struct.
|
|
* \param struct_offset Offset of the field in the struct.
|
|
* \return Pointer to the struct field.
|
|
*/
|
|
#define M_ST_MB_P(struct_p, struct_offset) \
|
|
((void *)((char *)(struct_p) + (unsigned long)(struct_offset)))
|
|
|
|
/// Access a struct field at a given offset.
|
|
/** \param member_type Type of the field.
|
|
* \param struct_p Pointer to the struct.
|
|
* \param struct_offset Offset of the field in the struct.
|
|
* \return The struct field at the given offset.
|
|
*/
|
|
#define M_ST_MB(member_type, struct_p, struct_offset) \
|
|
(*(member_type*) M_ST_MB_P ((struct_p), (struct_offset)))
|
|
|
|
|
|
|
|
/// Allocate the struct and set it to the defaults.
|
|
/** \param st Struct definition.
|
|
* \return The newly allocated object set to default.
|
|
*/
|
|
void*
|
|
m_struct_alloc(const m_struct_t* st);
|
|
|
|
/// Set a field of the struct.
|
|
/** \param st Struct definition.
|
|
* \param obj Pointer to the struct to set.
|
|
* \param field Name of the field to set.
|
|
* \param param New value of the field.
|
|
* \return 0 on error, 1 on success.
|
|
*/
|
|
int
|
|
m_struct_set(const m_struct_t* st, void* obj, char* field, char* param);
|
|
|
|
/// Reset a field (or all if field == NULL) to defaults.
|
|
/** \param st Struct definition.
|
|
* \param obj Pointer to the struct to set.
|
|
* \param field Name of the field to reset, if NULL all fields are reseted.
|
|
*/
|
|
void
|
|
m_struct_reset(const m_struct_t* st, void* obj, const char* field);
|
|
|
|
/// Create a copy of an existing struct.
|
|
/** \param st Struct definition.
|
|
* \param obj Pointer to the struct to copy.
|
|
* \return Newly allocated copy of obj.
|
|
*/
|
|
void*
|
|
m_struct_copy(const m_struct_t* st, void* obj);
|
|
|
|
/// Free an allocated struct.
|
|
/** \param st Struct definition.
|
|
* \param obj Pointer to the struct to copy.
|
|
*/
|
|
void
|
|
m_struct_free(const m_struct_t* st, void* obj);
|
|
|
|
/// Get a field description.
|
|
/** \param st Struct definition.
|
|
* \param f Name of the field.
|
|
* \return The \ref m_option struct describing the field or NULL if not found.
|
|
*/
|
|
const struct m_option*
|
|
m_struct_get_field(const m_struct_t* st,const char* f);
|
|
|
|
///@}
|
|
|
|
#endif /* MPLAYER_M_STRUCT_H */
|