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+++ b/scripts/strings/findstr.m
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+# 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 v = findstr (s, t)
+
+# usage: findstr (s, t)
+#
+# Returns the vector of all positions in the longer of the two strings
+# S and T where an occurence of the shorter of the two starts.
+  
+# Original version by Kurt Hornik <Kurt.Hornik@ci.tuwien.ac.at>.
+
+  if (nargin != 2)
+    usage ("findstr (s, t)");
+  endif
+
+  if (isstr (s) && isstr (t))
+
+    # Make S be the longer string.
+
+    if (length (s) < length (t))
+      tmp = s;
+      s = t;
+      t = tmp;
+    endif
+
+    s = toascii (s);
+    t = toascii (t);
+
+    ind = 1 : length (t);
+    limit = length (s) - length (t) + 1;
+    v  = zeros (1, limit);
+    i = 0;
+
+    for k = 1 : limit
+      if (s (ind + k - 1) == t)
+	v (++i) = k;
+      endif
+    endfor
+
+    if (i > 0)
+      v = v (1:i);
+    else
+      v = [];
+    endif
+
+  else
+    error ("findstr: both arguments must be strings");
+  endif
+
+endfunction