-
-(defmacro maybe-sap-maybe-string ((var) &body body)
- `(etypecase ,var
- (system-area-pointer
- (macrolet ((byte-ref (index)
- `(sap-ref-8 ,',var ,index))
- (char-ref (index)
- `(code-char (byte-ref ,index))))
- ,@body))
- (simple-string
- (macrolet ((char-ref (index)
- `(schar ,',var ,index))
- (byte-ref (index)
- `(char-code (char-ref ,index))))
- ,@body))))
-
-(defun %sp-find-character-with-attribute (string start end table mask)
- (declare (type (simple-array (unsigned-byte 8) (256)) table)
- (type (or simple-string system-area-pointer) string)
- (fixnum start end mask))
- #!+sb-doc
- "%SP-Find-Character-With-Attribute String, Start, End, Table, Mask
- The codes of the characters of String from Start to End are used as indices
- into the Table, which is a U-Vector of 8-bit bytes. When the number picked
- up from the table bitwise ANDed with Mask is non-zero, the current
- index into the String is returned. The corresponds to SCANC on the Vax."
- (maybe-sap-maybe-string (string)
- (do ((index start (1+ index)))
- ((>= index end) nil)
- (declare (fixnum index))
- (unless (zerop (logand (aref table (byte-ref index)) mask))
- (return index)))))
-
-(defun %sp-reverse-find-character-with-attribute (string start end table mask)
- #!+sb-doc
- "Like %SP-Find-Character-With-Attribute, only sdrawkcaB."
- (declare (type (or simple-string system-area-pointer) string)
- (fixnum start end mask)
- (type (array (unsigned-byte 8) (256)) table))
- (maybe-sap-maybe-string (string)
- (do ((index (1- end) (1- index)))
- ((< index start) nil)
- (declare (fixnum index))
- (unless (zerop (logand (aref table (byte-ref index)) mask))
- (return index)))))
-
-(defun %sp-find-character (string start end character)
- #!+sb-doc
- "%SP-Find-Character String, Start, End, Character
- Searches String for the Character from Start to End. If the character is
- found, the corresponding index into String is returned, otherwise NIL is
- returned."
- (declare (fixnum start end)
- (type (or simple-string system-area-pointer) string)
- (base-char character))
- (maybe-sap-maybe-string (string)
- (do ((index start (1+ index)))
- ((>= index end) nil)
- (declare (fixnum index))
- (when (char= (char-ref index) character)
- (return index)))))
-
-(defun %sp-reverse-find-character (string start end character)
- (declare (type (or simple-string system-area-pointer) string)
- (fixnum start end)
- (base-char character))
- #!+sb-doc
- "%SP-Reverse-Find-Character String, Start, End, Character
- Searches String for Character from End to Start. If the character is
- found, the corresponding index into String is returned, otherwise NIL is
- returned."
- (maybe-sap-maybe-string (string)
- (do ((index (1- end) (1- index))
- (terminus (1- start)))
- ((= index terminus) nil)
- (declare (fixnum terminus index))
- (if (char= (char-ref index) character)
- (return index)))))
-
-(defun %sp-skip-character (string start end character)
- (declare (type (or simple-string system-area-pointer) string)
- (fixnum start end)
- (base-char character))
- #!+sb-doc
- "%SP-Skip-Character String, Start, End, Character
- Returns the index of the first character between Start and End which
- is not Char= to Character, or NIL if there is no such character."
- (maybe-sap-maybe-string (string)
- (do ((index start (1+ index)))
- ((= index end) nil)
- (declare (fixnum index))
- (if (char/= (char-ref index) character)
- (return index)))))
-
-(defun %sp-reverse-skip-character (string start end character)
- (declare (type (or simple-string system-area-pointer) string)
- (fixnum start end)
- (base-char character))
- #!+sb-doc
- "%SP-Skip-Character String, Start, End, Character
- Returns the index of the last character between Start and End which
- is not Char= to Character, or NIL if there is no such character."
- (maybe-sap-maybe-string (string)
- (do ((index (1- end) (1- index))
- (terminus (1- start)))
- ((= index terminus) nil)
- (declare (fixnum terminus index))
- (if (char/= (char-ref index) character)
- (return index)))))
-
-(defun %sp-string-search (string1 start1 end1 string2 start2 end2)
- #!+sb-doc
- "%SP-String-Search String1, Start1, End1, String2, Start2, End2
- Searches for the substring of String1 specified in String2.
- Returns an index into String2 or NIL if the substring wasn't
- found."
- (declare (simple-string string1 string2))
- (do ((index2 start2 (1+ index2)))
- ((= index2 end2) nil)
- (declare (fixnum index2))
- (when (do ((index1 start1 (1+ index1))
- (index2 index2 (1+ index2)))
- ((= index1 end1) t)
- (declare (fixnum index1 index2))
- (when (= index2 end2)
- (return-from %sp-string-search nil))
- (when (char/= (char string1 index1) (char string2 index2))
- (return nil)))
- (return index2))))