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Index Page lparsm_c

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Procedure Abstract Required_Reading Keywords Brief_I/O Detailed_Input | Detailed_Output Parameters Exceptions Files Particulars Examples | Restrictions Literature_References Author_and_Institution Version Index_Entries

#### Procedure

       lparsm_c (Parse a list of items having multiple delimiters)

       void lparsm_c ( ConstSpiceChar   * list,
                       ConstSpiceChar   * delims,
                       SpiceInt           nmax,
                       SpiceInt           itemln,
                       SpiceInt         * n,
                       void             * items   )

#### Abstract

       Parse a list of items separated by multiple delimiters.

#### Required_Reading

       None.

#### Keywords

       CHARACTER
       LIST
       PARSING
       STRING

#### Brief_I/O

       VARIABLE  I/O  DESCRIPTION
       --------  ---  --------------------------------------------------
       list       I    List of items delimited by delims.
       delims     I    Single characters which delimit items.
       nmax       I    Maximum number of items to return.
       itemln     I    Length of strings in item array.
       n          O    Number of items in the list.
       items      O    Items in the list, left justified.

#### Detailed_Input

       list        is a list of items delimited by any one of the
                   characters in the string delims. Consecutive delimiters,
                   and delimiters at the beginning and end of the list, are
                   considered to delimit empty items. A blank or empty list
                   is considered to contain a single, empty item. Leading
                   and trailing blanks in list are ignored.

       delims      contains the individual characters which delimit
                   the items in the list. These may be any ASCII
                   characters, including blanks.

                   However, by definition, consecutive blanks are NOT
                   considered to be consecutive delimiters. Nor are
                   a blank and any other delimiter considered to be
                   consecutive delimiters.

       nmax        is the maximum number of items to be returned from the
                   list. This allows the user to guard against overflow
                   from a list containing more items than expected.

       itemln      is the declared length of the strings in the string
                   array items. This length must include room for the
                   terminating null character in each string.

#### Detailed_Output

       n           is the number of items in the list. `n' may be any number
                   between one and `nmax'.

       items       is an array of strings containing the items in the list,
                   left justified. Any item in the list too long to fit into
                   an element of `items' is truncated on the right. Empty
                   (null) or blank items in the input string are mapped to
                   empty strings on output.

                   `items' should be declared by the caller as:

                      SpiceChar items [nmax][itemln]

#### Parameters

       None.

#### Exceptions

       1)  If the string length of `items' is too short to accommodate
           an item, the item will be truncated on the right.

       2)  If `nmax' is less than one, then `n' will be set to zero, and no
           items will be returned. This case is not an error.

       3)  If the input `list' string is empty, the routine will return a
           single, empty output string in `items'. This case is not an error.

       4)  If any of the `list', `delims' or `list' input string pointers
           is null, the error SPICE(NULLPOINTER) is signaled.

       5)  If any of the `list' or `delims' input strings has zero
           length, the error SPICE(EMPTYSTRING) is signaled.

       6)  If the `items' output string pointer is null, the error
           SPICE(NULLPOINTER) is signaled.

       7)  If the `items' output string has length less than two
           characters, the error SPICE(STRINGTOOSHORT) is signaled, since
           the output string is too short to contain one character of
           output data plus a null terminator.

#### Files

       None.

#### Particulars

       None.

#### Examples

       The numerical results shown for these examples may differ across
       platforms. The results depend on the SPICE kernels used as
       input, the compiler and supporting libraries, and the machine
       specific arithmetic implementation.

       1) Parse a character string to retrieve the words contained
          within.

          Example code begins here.

          /.
             Program lparsm_ex1
          ./
          #include <stdio.h>
          #include "SpiceUsr.h"

          int main( )
          {

             /.
             Local constants.
             ./
             #define NMAX         25
             #define STRLEN       256

             /.
             Local variables.
             ./
             SpiceChar          * delims;
             SpiceChar            items  [NMAX][STRLEN];
             SpiceChar          * list;

             SpiceInt             i;
             SpiceInt             n;

             /.
             Define the list of delimited items.

             Think of a sentence as a list delimited by a space.
             `delims' is assigned to a space.
             ./
             list   = "Run and find out.";
             delims = " ";

             /.
             Parse the items from `list'.
             ./
             lparsm_c ( list, delims, NMAX, STRLEN, &n, items );

             /.
             Output the `items'.
             ./
             for ( i = 0; i < n; i++ )
             {

                printf( "Item %2d: %s\n", i, items[i] );

             }

             return ( 0 );
          }

          When this program was executed on a Mac/Intel/cc/64-bit
          platform, the output was:

          Item  0: Run
          Item  1: and
          Item  2: find
          Item  3: out.

       2) Parse a character string to retrive the items contained
          within, when then items are separated by multiple delimiters.

          Example code begins here.

          /.
             Program lparsm_ex2
          ./
          #include <stdio.h>
          #include "SpiceUsr.h"

          int main( )
          {

             /.
             Local constants.
             ./
             #define NMAX         25
             #define STRLEN       256

             /.
             Local variables.
             ./
             SpiceChar          * delims;
             SpiceChar            items  [NMAX][STRLEN];
             SpiceChar          * list;

             SpiceInt             i;
             SpiceInt             n;

             /.
             Define the list of delimited items.

             Think of a sentence as a list delimited by a space.
             `delims' is assigned to a space.
             ./
             list   = "  1986-187// 13:15:12.184 ";
             delims = " ,/-:";

             /.
             Parse the items from `list'.
             ./
             lparsm_c ( list, delims, NMAX, STRLEN, &n, items );

             /.
             Output the `items'.
             ./
             for ( i = 0; i < n; i++ )
             {

                printf( "Item %2d: \"%s\"\n", i, items[i] );

             }

             return ( 0 );
          }

          When this program was executed on a Mac/Intel/cc/64-bit
          platform, the output was:

          Item  0: "1986"
          Item  1: "187"
          Item  2: ""
          Item  3: "13"
          Item  4: "15"
          Item  5: "12.184"

#### Restrictions

       None.

#### Literature_References

       None.

#### Author_and_Institution

       N.J. Bachman        (JPL)
       J. Diaz del Rio     (ODC Space)
       I.M. Underwood      (JPL)

#### Version

       -CSPICE Version 1.1.0, 04-AUG-2021 (JDR)

           Changed input argument name "lenout" to "itemln" for consistency
           with other routines.

           Edited the header to comply with NAIF standard.
           Added complete code example.

       -CSPICE Version 1.0.0, 18-AUG-2002 (NJB) (IMU)

#### Index_Entries

       parse a list of items

#### Link to routine lparsm_c source file lparsm_c.c

    Fri Dec 31 18:41:09 2021