Mercurial > hg > octave-avbm
changeset 2271:707b9396ad2c
[project @ 1996-05-24 02:22:01 by jwe]
Initial revision
author | jwe |
---|---|
date | Fri, 24 May 1996 02:22:01 +0000 |
parents | cfcf8ff7d2dd |
children | e97fba45f0a3 |
files | scripts/strings/index.m scripts/strings/rindex.m |
diffstat | 2 files changed, 114 insertions(+), 0 deletions(-) [+] |
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new file mode 100644 --- /dev/null +++ b/scripts/strings/index.m @@ -0,0 +1,57 @@ +# Copyright (C) 1996 John W. Eaton +# +# This file is part of Octave. +# +# Octave is free software; you can redistribute it and/or modify it +# under the terms of the GNU General Public License as published by the +# Free Software Foundation; either version 2, or (at your option) any +# later version. +# +# Octave is distributed in the hope that it will be useful, but WITHOUT +# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or +# FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License +# for more details. +# +# You should have received a copy of the GNU General Public License +# along with Octave; see the file COPYING. If not, write to the Free +# Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + +function n = index (s, t) + +# usage: index (s, t) +# +# Returns the position of the first occurence of the string T in the +# string S or 0 if no occurence is found. +# +# NOTE: this function does not work for arrays of strings. + +# This is patterned after the AWK function of the same name. + +# Original version by Kurt Hornik <Kurt.Hornik@ci.tuwien.ac.at>. + + if (nargin != 2) + usage ("index (s, t)"); + endif + + n = 0; + + if (isstr (s) && isstr (t)) + + l_s = length (s); + l_t = length (t); + + if (l_t <= l_s) + tmp = l_s - l_t + 1; + for idx = 1 : tmp + if (strcmp (substr (s, idx, l_t), t)) + n = idx; + return; + endif + endfor + endif + + else + error ("index: expecting string arguments"); + endif + +endfunction
new file mode 100644 --- /dev/null +++ b/scripts/strings/rindex.m @@ -0,0 +1,57 @@ +# Copyright (C) 1996 John W. Eaton +# +# This file is part of Octave. +# +# Octave is free software; you can redistribute it and/or modify it +# under the terms of the GNU General Public License as published by the +# Free Software Foundation; either version 2, or (at your option) any +# later version. +# +# Octave is distributed in the hope that it will be useful, but WITHOUT +# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or +# FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License +# for more details. +# +# You should have received a copy of the GNU General Public License +# along with Octave; see the file COPYING. If not, write to the Free +# Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + +function n = rindex (s, t) + +# usage: rindex (s, t) +# +# Returns the position of the last occurence of the string T in the +# string S or 0 if no occurence is found. +# +# NOTE: this function does not work for arrays of strings. + +# This is patterned after the AWK function of the same name. + +# Original version by Kurt Hornik <Kurt.Hornik@ci.tuwien.ac.at>. + + if (nargin != 2) + usage ("rindex (s, t)"); + endif + + n = 0; + + if (isstr (s) && isstr (t)) + + l_s = length (s); + l_t = length (t); + + if (l_t <= l_s) + tmp = l_s - l_t + 1; + for idx = tmp : -1 : 1 + if (strcmp (substr (s, idx, l_t), t)) + n = idx; + return; + endif + endfor + endif + + else + error ("rindex: expecting string arguments"); + endif + +endfunction