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3.6 rangel_parse

parse a list of integral ranges

Synopsis

     #include <suplib/range.h>
     
     
     
RangeErr rangel_parse( RangeLList **rll, char *range_spec, RangeOpts opts, long minval, long maxval, long *where );

Parameters

RangeLList **rll
returned range list
char *range_spec
string containing range to parse
RangeOpts opts
range options
          
          
Possible values for a RangeOpts are as follows: Range_SORT, Range_MERGE, Range_INCOMPLETE, Range_UNSIGNED
long minval
minimum value for incomplete start
long maxval
maximum value for incomplete end
long *where
position in string where error occurred

Description

rangel_parse translates a list of ranges of the form

     r1[{,| }r2[{,| }r3]]...

into start-end pairs. The handling of the ranges depends upon the flags set in the opts arguement. opts is set to the logical OR of zero or more of the following values

Range_SORT
The resultant ranges will be sorted in ascending order by their lower bound


Range_MERGE
Adjacent ranges will be merged, if possible. This implies Range_SORT.


Range_INCOMPLETE
If set, incomplete ranges, i.e., those without an explicit start or end value, are accepted. In this case, implied starts are set to the value of the passed minval argument, while implied ends are set to the value of the maxval argument.


Range_UNSIGNED
Only unsigned integers are allowed in the ranges.

Returns

It returns a code indicating whether an error ocurred. See suplib/range.h for the possible errors and codes. It also returns the location of the error in the range specification via the passed where variable.


Possible values for a RangeErr are as follows:
RangeErr_OK
no error
RangeErr_NOMEM
out of memory
RangeErr_INCOMPLETE
incomplete range
RangeErr_ERANGE
number out of bounds
RangeErr_ILLNUM
not a number
RangeErr_NEGNUM
negative number
RangeErr_OFLOWSTART
overflow of start value
RangeErr_NONPOSCOUNT
non-positive count
RangeErr_OFLOWEND
overflow of end value
RangeErr_INTERNAL
internal error
RangeErr_ORDER
start greater than end
RangeErr_EMPTY
float range is empty set
RangeErr_MAXERR

A Range Has The Format

     [start]{`:'}[end]
     [start]{`/'}count

where start and end are optional limits on the range, and count specifies the number of elements in a range. In the first form, if start or end is missing, minval and maxval are used appropriately (if the incomplete range flag is set). In the second form, if start is missing, the range starts at 1 if no previous range was specified, or directly follows the end of the previous range.

rangel_parse creates a RangeLList object and returns it via the rll parameter.

Author

Diab Jerius