Until now, the procedure code has provided a case to the case_source,

[pspp] / src / data / ChangeLog

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+2007-06-06  Ben Pfaff  <blp@gnu.org>
+
+       Until now, the procedure code has provided a case to the
+       case_source, which has filled in the data values that come from
+       the active file.  "Left" data values that don't come from the
+       active file naturally stay the same from case to case, because the
+       procedure code keeps using that same case.
+
+       One of the compromises that comes with the new procedure code is
+       that the active file allocates and provides its own case, which
+       the procedure code then has to resize to provide room for any
+       other variables that should go in the case and then fill in the
+       values of "left" variables.  Then, when we're done with that case,
+       we have to save the values of "left" variables to copy into the
+       next case read from the active file.
+
+       The caseinit code helps with this.
+
+       * automake.mk: Add new files.
+
+       * caseinit.c: New file. 
+
+       * caseinit.h: New file. 
+
+2007-06-06  Ben Pfaff  <blp@gnu.org>
+
+       * value.h (value_cnt_from_width): New function.
+
+       * variable.c (var_get_value_cnt): Use new function.
+
+2007-06-06  Ben Pfaff  <blp@gnu.org>
+
+       Add casegrouper, to allow cases read from a given casereader to be
+       broken into groups, each of which has its own casereader.
+       Generally cases are grouped based on having equal values for some
+       set of variables.
+
+       * automake.mk: Add new files.
+
+       * casegrouper.c: New file.
+
+       * casegrouper.h: New file.
+
+2007-06-06  Ben Pfaff  <blp@gnu.org>
+
+       Add interface to lexicographical ordering of cases.
+
+       * automake.mk: Add new files.
+
+       * case-ordering.c: New file.
+
+       * case-ordering.h: New file.
+
 2007-06-06  Ben Pfaff  <blp@gnu.org>
 
        Add casereaders and casewriters, the basis of the new data processing