STR_INDEX

Name

STR_INDEX()

Purpose

Get indices of a substring (SUBSTR) in string.

Explanation

The IDL intrinsic function STRPOS returns only the index of the first
occurrence of a substring. This routine calls itself recursively to get
indices of the remaining occurrences.

Calling Sequence

result= STR_INDEX(str, substr [, offset])

Inputs

STR -- The string in which the substring is searched for
SUBSTR -- The substring to be searched for within STR

Optional Inputs

OFFSET -- The character position at which the search is begun. If
omitted or being negative, the search begins at the first
character (character position 0).

Outputs

RESULT -- Integer scalar or vector containing the indices of SUBSTR
within STR. If no substring is found, it is -1.

Calls

DELVARX

Common Blocks

STR_INDEX -- internal common block. The variable save in the block is
deleted upon final exit of this routine.

Modification History

Written January 3, 1995, Liyun Wang, GSFC/ARC
Converted to IDL V5.0 W. Landsman September 1997
Use size(/TNAME) instead of DATATYPE() W. Landsman October 2001