[2] | 1 | ;+ |
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| 2 | ; |
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[142] | 3 | ; @file_comments |
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[163] | 4 | ; return position *array* for occurrence of a character in a string |
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[2] | 5 | ; |
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[142] | 6 | ; @categories |
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[157] | 7 | ; String |
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[2] | 8 | ; |
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[142] | 9 | ; @param STR {in}{required} |
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| 10 | ; the string |
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[2] | 11 | ; |
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[142] | 12 | ; @param SCHAR {in}{required} |
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| 13 | ; the character to look for |
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[2] | 14 | ; |
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[238] | 15 | ; @returns |
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| 16 | ; The number of matches that were found |
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[2] | 17 | ; |
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[371] | 18 | ; The function returns an index array similar to the |
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| 19 | ; result of the where function |
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[2] | 20 | ; |
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[142] | 21 | ; @examples |
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[371] | 22 | ; |
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| 23 | ; find position of string "a" in the string "abcabcabc" |
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| 24 | ; |
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| 25 | ; IDL> ind = strwhere('abcabcabc','a') |
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| 26 | ; IDL> print, ind |
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[238] | 27 | ; [ 0, 3, 6 ] |
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[2] | 28 | ; |
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[142] | 29 | ; @history |
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[2] | 30 | ; mgs, 02 Jun 1998: VERSION 1.00 |
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[238] | 31 | ; bmy, 30 Jun 1998: - now returns COUNT, the number |
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[2] | 32 | ; of matches that are found (this is |
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| 33 | ; analogous to the WHERE command) |
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| 34 | ; |
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[142] | 35 | ; @version |
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| 36 | ; $Id$ |
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| 37 | ; |
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[2] | 38 | ; Copyright (C) 1998, Martin Schultz, Harvard University |
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| 39 | ; This software is provided as is without any warranty |
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| 40 | ; whatsoever. It may be freely used, copied or distributed |
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| 41 | ; for non-commercial purposes. This copyright notice must be |
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| 42 | ; kept with any copy of this software. If this software shall |
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| 43 | ; be used commercially or sold as part of a larger package, |
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| 44 | ; please contact the author to arrange payment. |
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[262] | 45 | ; Bugs and comments should be directed to mgs\@io.harvard.edu |
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[2] | 46 | ; with subject "IDL routine strwhere" |
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[262] | 47 | ;- |
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| 48 | FUNCTION strwhere, str, schar,count |
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[114] | 49 | ; |
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| 50 | compile_opt idl2, strictarrsubs |
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| 51 | ; |
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[2] | 52 | if (n_elements(str) eq 0) then return,-1 |
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[238] | 53 | |
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[2] | 54 | ; convert to byte |
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| 55 | BStr = byte(Str) |
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| 56 | BSC = (byte(schar))[0] |
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[238] | 57 | |
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[2] | 58 | ; Search for matches |
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| 59 | Ind = where( Bstr eq BSC, Count ) |
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| 60 | |
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| 61 | ;### bmy ### return,where(BStr eq BSC) |
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| 62 | return, Ind |
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| 63 | |
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| 64 | end |
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