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bson.reader: Allow reading a sequence of bson objects from a file.

db4
Doug Coleman 2013-11-16 14:02:55 -08:00
parent 935612035c
commit b611a370ff
1 changed files with 12 additions and 7 deletions
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19
extra/bson/reader/reader.factor
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@ -2,7 +2,7 @@
! See http://factorcode.org/license.txt for BSD license.
USING: accessors assocs bson.constants calendar combinators
combinators.short-circuit io io.binary kernel math locals
io.encodings.utf8 io.encodings
io.encodings.utf8 io.encodings io.files sequences.extras
namespaces sequences serialize strings vectors byte-arrays ;
FROM: io.encodings.binary => binary ;
@ -52,8 +52,8 @@ DEFER: read-elements
[ clear-assoc ] [ ] [ ] tri state
] dip with-variable ; inline
: bson-object-data-read ( -- )
read-int32 drop read-elements ; inline recursive
: bson-object-data-read ( -- ? )
read-int32 [ f ] [ drop read-elements t ] if-zero ; inline recursive
: bson-binary-read ( -- binary )
read-int32 read-byte
@ -84,8 +84,8 @@ TYPED: element-data-read ( type: integer -- object )
{ T_Integer [ read-int32 ] }
{ T_Integer64 [ read-longlong ] }
{ T_Binary [ bson-binary-read ] }
{ T_Object [ [ bson-object-data-read ] object-result check-object ] }
{ T_Array [ [ bson-object-data-read ] object-result values ] }
{ T_Object [ [ bson-object-data-read drop ] object-result check-object ] }
{ T_Array [ [ bson-object-data-read drop ] object-result values ] }
{ T_Double [ read-double ] }
{ T_Boolean [ read-byte 1 = ] }
{ T_Date [ read-longlong millis>timestamp ] }
@ -111,7 +111,12 @@ TYPED: (element-read) ( type: integer -- cont?: boolean )
PRIVATE>
: stream>assoc ( exemplar -- assoc )
: stream>assoc ( exemplar -- assoc/f )
clone [
state [ bson-object-data-read ] with-variable
] keep ;
] keep swap [ drop f ] unless ;
: path>bson-sequence ( path -- assoc )
binary [
[ H{ } stream>assoc ] loop>array
] with-file-reader ;