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Process MS SQL smallint datatypes as unsigned, fix #262.

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The freetds protocol apparently sends unsigned versions of the values on
the wire, so that we have to convert them to signed numbers upon
reception.
This commit is contained in:
Dimitri Fontaine 2015-07-22 10:32:13 +02:00
parent 3af99051d2
commit db0f21b5a5
1 changed files with 7 additions and 1 deletions
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8
src/monkey/mssql.lisp
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@ -73,13 +73,19 @@
(:syb-xml 163)
)
(defun unsigned-to-signed (byte n)
(declare (type fixnum n) (type unsigned-byte byte))
(logior byte (- (mask-field (byte 1 (1- (* n 8))) byte))))
(defun sysdb-data-to-lisp (%dbproc data type len)
(if (> len 0)
(case (foreign-enum-keyword '%syb-value-type type)
((:syb-varchar :syb-text) (foreign-string-to-lisp data :count len))
(:syb-char (string-trim #(#\Space) (foreign-string-to-lisp data :count len)))
((:syb-bit :syb-bitn) (mem-ref data :int))
((:syb-int1 :syb-int2 :syb-int4) (mem-ref data :int))
((:syb-int1 (unsigned-to-signed (mem-ref data :int) 1)))
((:syb-int2 (unsigned-to-signed (mem-ref data :int) 2)))
((:syb-int4 (unsigned-to-signed (mem-ref data :int) 4)))
(:syb-int8 (mem-ref data :int8))
(:syb-flt8 (mem-ref data :double))
(:syb-datetime