1 | ;+ |
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2 | ; |
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3 | ; @file_comments |
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4 | ; return right subportion from a string |
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5 | ; |
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6 | ; @categories |
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7 | ; String |
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8 | ; |
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9 | ; @param S {in}{required} |
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10 | ; the string to be searched |
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11 | ; |
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12 | ; @param LASTN {in}{required}{default=1} |
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13 | ; the number of characters to be returned. |
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14 | ; |
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15 | ; If LASTN is the strlen(STRING), the complete string |
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16 | ; is returned. |
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17 | ; |
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18 | ; @returns |
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19 | ; The portion of LASTN characters of S counted from the back. |
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20 | ; |
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21 | ; @examples |
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22 | ; |
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23 | ; add a "/" in to path if it "/" is not at the end : |
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24 | ; |
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25 | ; IDL> path="/tmp" |
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26 | ; IDL> if (strright(path) ne '/') then path = path + '/' |
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27 | ; IDL> print,path |
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28 | ; /tmp/ |
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29 | ; |
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30 | ; @history |
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31 | ; mgs, 19 Nov 1997: VERSION 1.00 |
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32 | ; |
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33 | ; @version |
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34 | ; $Id$ |
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35 | ; |
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36 | ; Copyright (C) 1997, Martin Schultz, Harvard University |
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37 | ; This software is provided as is without any warranty |
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38 | ; whatsoever. It may be freely used, copied or distributed |
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39 | ; for non-commercial purposes. This copyright notice must be |
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40 | ; kept with any copy of this software. If this software shall |
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41 | ; be used commercially or sold as part of a larger package, |
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42 | ; please contact the author to arrange payment. |
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43 | ; Bugs and comments should be directed to mgs\@io.harvard.edu |
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44 | ; with subject "IDL routine strright" |
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45 | ;- |
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46 | FUNCTION strright, s, lastn |
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47 | ; |
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48 | compile_opt idl2, strictarrsubs |
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49 | ; |
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50 | |
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51 | on_error,2 ; return to caller |
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52 | |
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53 | if (n_elements(s) le 0) then return,-1L |
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54 | |
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55 | l = strlen(s) |
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56 | |
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57 | if (n_elements(lastn) le 0) then lastn = 1 |
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58 | if lastn gt l then lastn = l |
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59 | |
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60 | result = strmid(s,l-lastn,l) |
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61 | |
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62 | return,result |
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63 | end |
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