Referencia del Archivo src/libpq/include/utils/pg_lzcompress.h

Ir al código fuente de este archivo.

Clases
struct	PGLZ_Header
struct	PGLZ_Strategy
struct	PGLZ_DecompState
'defines'
#define	PGLZ_MAX_OUTPUT(_dlen)
#define	PGLZ_RAW_SIZE(_lzdata)   ((_lzdata)->rawsize)
#define	PGLZ_IS_COMPRESSED(_lzdata)
#define	PGLZ_RAW_DATA(_lzdata)
#define	pglz_decomp_getchar(_ds)   ((*((_ds)->next_char))((_ds)))
#define	pglz_decomp_init(_ds, _lz)
#define	pglz_decomp_end(_ds)
'typedefs'
typedef struct PGLZ_Header	PGLZ_Header
typedef struct PGLZ_Strategy	PGLZ_Strategy
typedef struct PGLZ_DecompState	PGLZ_DecompState
Funciones
int	pglz_compress (char *source, int32 slen, PGLZ_Header *dest, PGLZ_Strategy *strategy)
int	pglz_decompress (PGLZ_Header *source, char *dest)
int	pglz_get_next_decomp_char_from_lzdata (PGLZ_DecompState *dstate)
int	pglz_get_next_decomp_char_from_plain (PGLZ_DecompState *dstate)
Variables
PGLZ_Strategy *	PGLZ_strategy_default
PGLZ_Strategy *	PGLZ_strategy_always
PGLZ_Strategy *	PGLZ_strategy_never

---

Documentación de los 'defines'

#define pglz_decomp_end

(

_ds

)

Valor:

do {                                                                                    \
                if ((_ds)->temp_buf != NULL)                                                                            \
                        pfree((void *)((_ds)->temp_buf));                                                               \
        } while (0)

#define pglz_decomp_getchar

(

_ds

)

((*((_ds)->next_char))((_ds)))

#define pglz_decomp_init	(		_ds,
			_lz
	)

Valor:

do {                                                                            \
                (_ds)->cp_in            = ((unsigned char *)(_lz))                                              \
                                                                                        + sizeof(PGLZ_Header);                  \
                (_ds)->cp_end           = (_ds)->cp_in + (_lz)->varsize                                 \
                                                                                        - sizeof(PGLZ_Header);                  \
                if (PGLZ_IS_COMPRESSED((_lz))) {                                                                        \
                        (_ds)->temp_buf         = (unsigned char *)                                                     \
                                                                                palloc(PGLZ_RAW_SIZE((_lz)));           \
                        (_ds)->cp_out           = (_ds)->temp_buf;                                                      \
                        (_ds)->next_char        = pglz_get_next_decomp_char_from_lzdata;        \
                        (_ds)->tocopy           = 0;                                                                            \
                        (_ds)->ctrl_count       = 0;                                                                            \
                } else {                                                                                                                        \
                        (_ds)->temp_buf         = NULL;                                                                         \
                        (_ds)->next_char        = pglz_get_next_decomp_char_from_plain;         \
                }                                                                                                                                       \
        } while (0)

#define PGLZ_IS_COMPRESSED

(

_lzdata

)

Valor:

((_lzdata)->varsize !=                          \
e                                                                                (_lzdata)->rawsize +                   e       \
                                                                                                                sizeof(PGLZ_Header))

#define PGLZ_MAX_OUTPUT

(

_dlen

)

Valor:

((_dlen) + (((_dlen) | 0x07) >> 3)      \
                                                                                                         + sizeof(PGLZ_Header))

#define PGLZ_RAW_DATA

(

_lzdata

)

Valor:

(((char *)(_lzdata)) +                          \
                                                                                                                sizeof(PGLZ_Header))

#define PGLZ_RAW_SIZE

(

_lzdata

)

((_lzdata)->rawsize)

---

Documentación de los 'typedefs'

typedef struct PGLZ_DecompState PGLZ_DecompState

typedef struct PGLZ_Header PGLZ_Header

typedef struct PGLZ_Strategy PGLZ_Strategy

---

Documentación de las funciones

int pglz_compress	(	char *	source,
		int32	slen,
		PGLZ_Header *	dest,
		PGLZ_Strategy *	strategy
	)

int pglz_decompress	(	PGLZ_Header *	source,
		char *	dest
	)

int pglz_get_next_decomp_char_from_lzdata

(

PGLZ_DecompState *

dstate

)

int pglz_get_next_decomp_char_from_plain

(

PGLZ_DecompState *

dstate

)

---

Documentación de las variables

PGLZ_Strategy* PGLZ_strategy_always

PGLZ_Strategy* PGLZ_strategy_default

PGLZ_Strategy* PGLZ_strategy_never