Index of Functions: A B C D E F G H I J K L M N O P Q R S T U V W X
Index Page bsrchi_c

Table of contents

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

       bsrchi_c ( Binary search for an integer value )

       SpiceInt bsrchi_c ( SpiceInt          value,
                           SpiceInt          ndim,
                           ConstSpiceInt   * array )

#### Abstract

       Do a binary search for a given value within an integer array,
       assumed to be in nondecreasing order. Return the index of the
       matching array entry, or -1 if the key value is not found.

#### Required_Reading

       None.

#### Keywords

       ARRAY
       SEARCH

#### Brief_I/O

       VARIABLE  I/O  DESCRIPTION
       --------  ---  --------------------------------------------------
       value      I   Value to find in `array'.
       ndim       I   Dimension of `array'.
       array      I   Array to be searched.

       The function returns the index of the input key value in the
       input array, or -1 if the value is not found.

#### Detailed_Input

       value       is the value to be found in the input array.

       ndim        is the number of elements in the input array.

       array       is the integer array to be searched. The elements in
                   `array' are assumed to sorted in increasing order.

#### Detailed_Output

       The function returns the index of the specified value in the input
       array. Indices range from 0 to ndim-1.

       If the input array does not contain the specified value, the
       function returns -1.

       If the input array contains more than one occurrence of the
       specified value, the returned index may point to any of the
       occurrences.

#### Parameters

       None.

#### Exceptions

       Error free.

       1)  If ndim < 1, the value of the function is -1.

#### Files

       None.

#### Particulars

       A binary search is performed on the input array. If an element of
       the array is found to match the input value, the index of that
       element is returned. If no matching element is found, -1 is
       returned.

#### Examples

       Let array contain the following elements:

          -11
            0
           22
          750

       Then

          bsrchi_c ( -11, 4, array )   ==  0
          bsrchi_c (  22, 4, array )   ==  2
          bsrchi_c ( 751, 4, array )   == -1

#### Restrictions

       1)  `array' is assumed to be sorted in increasing order. If this
           condition is not met, the results of bsrchi_c are unpredictable.

#### Literature_References

       None.

#### Author_and_Institution

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

#### Version

       -CSPICE Version 1.0.1, 01-NOV-2021 (JDR)

           Edited the header to comply with NAIF standard.

       -CSPICE Version 1.0.0, 30-AUG-2002 (NJB) (IMU)

#### Index_Entries

       binary search for an integer value

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

    Fri Dec 31 18:41:02 2021