@ -5,59 +5,21 @@
* interfaces . Only components that are implementing these interfaces need
* to worry about this file .
*
* This is tedious ; this is the place in upb where I most wish I had a C + +
* feature . In C + + the compiler would generate this all for me . If there ' s
* any consolation , it ' s that I have a bit of flexibility you don ' t have in
* C + + : I could , with preprocessor magic alone " de-virtualize " this interface
* for a particular source file . Say I had a C file that called a upb_src ,
* but didn ' t want to pay the virtual function overhead . I could define :
*
* # define upb_src_getdef ( src ) upb_decoder_getdef ( ( upb_decoder * ) src )
* # define upb_src_stargmsg ( src ) upb_decoder_startmsg ( upb_decoder * ) src )
* // etc.
*
* The source file is compatible with the regular upb_src interface , but here
* we bind it to a particular upb_src ( upb_decoder ) , which could lead to
* improved performance at a loss of flexibility for this one upb_src client .
*
* Copyright ( c ) 2010 Joshua Haberman . See LICENSE for details .
*/
# ifndef UPB_SRCSINK_VTBL_H_
# define UPB_SRCSINK_VTBL_H_
# include "upb.h"
# include <assert.h>
# include "upb_stream.h"
# ifdef __cplusplus
extern " C " {
# endif
struct upb_src ;
typedef struct upb_src upb_src ;
struct upb_sink ;
typedef struct upb_sink upb_sink ;
struct upb_bytesrc ;
typedef struct upb_bytesrc upb_bytesrc ;
struct upb_bytesink ;
typedef struct upb_bytesink upb_bytesink ;
// Typedefs for function pointers to all of the virtual functions.
// upb_src.
typedef struct _upb_fielddef * ( * upb_src_getdef_fptr ) ( upb_src * src ) ;
typedef bool ( * upb_src_getval_fptr ) ( upb_src * src , upb_valueptr val ) ;
typedef bool ( * upb_src_getstr_fptr ) ( upb_src * src , upb_string * str ) ;
typedef bool ( * upb_src_skipval_fptr ) ( upb_src * src ) ;
typedef bool ( * upb_src_startmsg_fptr ) ( upb_src * src ) ;
typedef bool ( * upb_src_endmsg_fptr ) ( upb_src * src ) ;
// upb_sink.
typedef bool ( * upb_sink_putdef_fptr ) ( upb_sink * sink , struct _upb_fielddef * def ) ;
typedef bool ( * upb_sink_putval_fptr ) ( upb_sink * sink , upb_value val ) ;
typedef bool ( * upb_sink_putstr_fptr ) ( upb_sink * sink , upb_string * str ) ;
typedef bool ( * upb_sink_startmsg_fptr ) ( upb_sink * sink ) ;
typedef bool ( * upb_sink_endmsg_fptr ) ( upb_sink * sink ) ;
// upb_bytesrc.
typedef bool ( * upb_bytesrc_get_fptr ) (
upb_bytesrc * src , upb_string * str , upb_strlen_t minlen ) ;
@ -68,23 +30,6 @@ typedef bool (*upb_bytesrc_append_fptr)(
typedef int32_t ( * upb_bytesink_put_fptr ) ( upb_bytesink * sink , upb_string * str ) ;
// Vtables for the above interfaces.
typedef struct {
upb_src_getdef_fptr getdef ;
upb_src_getval_fptr getval ;
upb_src_getstr_fptr getstr ;
upb_src_skipval_fptr skipval ;
upb_src_startmsg_fptr startmsg ;
upb_src_endmsg_fptr endmsg ;
} upb_src_vtable ;
typedef struct {
upb_sink_putdef_fptr putdef ;
upb_sink_putval_fptr putval ;
upb_sink_putstr_fptr putstr ;
upb_sink_startmsg_fptr startmsg ;
upb_sink_endmsg_fptr endmsg ;
} upb_sink_vtable ;
typedef struct {
upb_bytesrc_get_fptr get ;
upb_bytesrc_append_fptr append ;
@ -97,42 +42,18 @@ typedef struct {
// "Base Class" definitions; components that implement these interfaces should
// contain one of these structures.
struct upb_src {
upb_src_vtable * vtbl ;
upb_status status ;
bool eof ;
} ;
struct upb_sink {
upb_sink_vtable * vtbl ;
upb_status status ;
bool eof ;
} ;
struct upb_bytesrc {
struct _upb_bytesrc {
upb_bytesrc_vtable * vtbl ;
upb_status status ;
bool eof ;
} ;
struct upb_bytesink {
struct _upb_bytesink {
upb_bytesink_vtable * vtbl ;
upb_status status ;
bool eof ;
} ;
INLINE void upb_src_init ( upb_src * s , upb_src_vtable * vtbl ) {
s - > vtbl = vtbl ;
s - > eof = false ;
upb_status_init ( & s - > status ) ;
}
INLINE void upb_sink_init ( upb_sink * s , upb_sink_vtable * vtbl ) {
s - > vtbl = vtbl ;
s - > eof = false ;
upb_status_init ( & s - > status ) ;
}
INLINE void upb_bytesrc_init ( upb_bytesrc * s , upb_bytesrc_vtable * vtbl ) {
s - > vtbl = vtbl ;
s - > eof = false ;
@ -146,46 +67,6 @@ INLINE void upb_bytesink_init(upb_bytesink *s, upb_bytesink_vtable *vtbl) {
}
// Implementation of virtual function dispatch.
INLINE struct _upb_fielddef * upb_src_getdef ( upb_src * src ) {
return src - > vtbl - > getdef ( src ) ;
}
INLINE bool upb_src_getval ( upb_src * src , upb_valueptr val ) {
return src - > vtbl - > getval ( src , val ) ;
}
INLINE bool upb_src_getstr ( upb_src * src , upb_string * str ) {
return src - > vtbl - > getstr ( src , str ) ;
}
INLINE bool upb_src_skipval ( upb_src * src ) { return src - > vtbl - > skipval ( src ) ; }
INLINE bool upb_src_startmsg ( upb_src * src ) { return src - > vtbl - > startmsg ( src ) ; }
INLINE bool upb_src_endmsg ( upb_src * src ) { return src - > vtbl - > endmsg ( src ) ; }
// Implementation of type-specific upb_src accessors. If we encounter a upb_src
// where these can be implemented directly in a measurably more efficient way,
// we can make these part of the vtable also.
//
// For <64-bit types we have to use a temporary to accommodate baredecoder,
// which does not know the actual width of the type.
INLINE bool upb_src_getbool ( upb_src * src , bool * _bool ) {
upb_value val ;
bool ret = upb_src_getval ( src , upb_value_addrof ( & val ) ) ;
* _bool = val . _bool ;
return ret ;
}
INLINE bool upb_src_getint32 ( upb_src * src , int32_t * i32 ) {
upb_value val ;
bool ret = upb_src_getval ( src , upb_value_addrof ( & val ) ) ;
* i32 = val . int32 ;
return ret ;
}
// TODO.
bool upb_src_getint32 ( upb_src * src , int32_t * val ) ;
bool upb_src_getint64 ( upb_src * src , int64_t * val ) ;
bool upb_src_getuint32 ( upb_src * src , uint32_t * val ) ;
bool upb_src_getuint64 ( upb_src * src , uint64_t * val ) ;
bool upb_src_getfloat ( upb_src * src , float * val ) ;
bool upb_src_getdouble ( upb_src * src , double * val ) ;
// upb_bytesrc
INLINE bool upb_bytesrc_get (
@ -198,24 +79,108 @@ INLINE bool upb_bytesrc_append(
return bytesrc - > vtbl - > append ( bytesrc , str , len ) ;
}
// upb_sink
INLINE bool upb_sink_putdef ( upb_sink * sink , struct _upb_fielddef * def ) {
return sink - > vtbl - > putdef ( sink , def ) ;
INLINE upb_status * upb_bytesrc_status ( upb_bytesrc * src ) { return & src - > status ; }
INLINE bool upb_bytesrc_eof ( upb_bytesrc * src ) { return src - > eof ; }
// upb_handlers
struct _upb_handlers {
upb_handlerset * set ;
void * closure ;
} ;
INLINE void upb_handlers_init ( upb_handlers * h ) {
( void ) h ;
}
INLINE void upb_handlers_uninit ( upb_handlers * h ) {
( void ) h ;
}
INLINE void upb_handlers_reset ( upb_handlers * h ) {
h - > set = NULL ;
h - > closure = NULL ;
}
INLINE bool upb_handlers_isempty ( upb_handlers * h ) {
return ! h - > set & & ! h - > closure ;
}
INLINE void upb_register_handlerset ( upb_handlers * h , upb_handlerset * set ) {
h - > set = set ;
}
INLINE void upb_set_handler_closure ( upb_handlers * h , void * closure ) {
h - > closure = closure ;
}
// upb_dispatcher
typedef struct {
upb_handlers handlers ;
int depth ;
} upb_dispatcher_frame ;
struct _upb_dispatcher {
upb_dispatcher_frame stack [ UPB_MAX_NESTING ] , * top , * limit ;
} ;
INLINE void upb_dispatcher_init ( upb_dispatcher * d ) {
d - > limit = d - > stack + sizeof ( d - > stack ) ;
}
INLINE bool upb_sink_putval ( upb_sink * sink , upb_value val ) {
return sink - > vtbl - > putval ( sink , val ) ;
INLINE void upb_dispatcher_reset ( upb_dispatcher * d , upb_handlers * h ) {
d - > top = d - > stack ;
d - > top - > depth = 1 ; // Never want to trigger end-of-delegation.
d - > top - > handlers = * h ;
}
INLINE bool upb_sink_putstr ( upb_sink * sink , upb_string * str ) {
return sink - > vtbl - > putstr ( sink , str ) ;
INLINE void upb_dispatch_startmsg ( upb_dispatcher * d ) {
assert ( d - > stack = = d - > top ) ;
d - > top - > handlers . set - > startmsg ( d - > top - > handlers . closure ) ;
}
INLINE bool upb_sink_startmsg ( upb_sink * sink ) {
return sink - > vtbl - > startmsg ( sink ) ;
INLINE void upb_dispatch_endmsg ( upb_dispatcher * d ) {
assert ( d - > stack = = d - > top ) ;
d - > top - > handlers . set - > endmsg ( d - > top - > handlers . closure ) ;
}
INLINE bool upb_sink_endmsg ( upb_sink * sink ) {
return sink - > vtbl - > endmsg ( sink ) ;
INLINE upb_flow_t upb_dispatch_startsubmsg ( upb_dispatcher * d ,
struct _upb_fielddef * f ) {
upb_handlers handlers ;
upb_handlers_init ( & handlers ) ;
upb_handlers_reset ( & handlers ) ;
upb_flow_t ret = d - > top - > handlers . set - > startsubmsg ( d - > top - > handlers . closure , f , & handlers ) ;
assert ( ( ret = = UPB_DELEGATE ) = = ! upb_handlers_isempty ( & handlers ) ) ;
if ( ret = = UPB_DELEGATE ) {
+ + d - > top ;
d - > top - > handlers = handlers ;
d - > top - > depth = 0 ;
d - > top - > handlers . set - > startmsg ( d - > top - > handlers . closure ) ;
ret = UPB_CONTINUE ;
}
+ + d - > top - > depth ;
upb_handlers_uninit ( & handlers ) ;
return ret ;
}
INLINE upb_flow_t upb_dispatch_endsubmsg ( upb_dispatcher * d ) {
if ( - - d - > top - > depth = = 0 ) {
d - > top - > handlers . set - > endmsg ( d - > top - > handlers . closure ) ;
- - d - > top ;
}
return d - > top - > handlers . set - > endsubmsg ( d - > top - > handlers . closure ) ;
}
INLINE upb_status * upb_sink_status ( upb_sink * sink ) { return & sink - > status ; }
INLINE upb_flow_t upb_dispatch_value ( upb_dispatcher * d ,
struct _upb_fielddef * f ,
upb_value val ) {
return d - > top - > handlers . set - > value ( d - > top - > handlers . closure , f , val ) ;
}
INLINE upb_flow_t upb_dispatch_unknownval ( upb_dispatcher * d ,
upb_field_number_t fieldnum ,
upb_value val ) {
return d - > top - > handlers . set - > unknownval ( d - > top - > handlers . closure ,
fieldnum , val ) ;
}
// upb_bytesink
INLINE int32_t upb_bytesink_put ( upb_bytesink * sink , upb_string * str ) {
Joshua Haberman
14 years ago