Mercurial > octave-nkf
view src/ov-cs-list.cc @ 4461:af308ca1a354
[project @ 2003-07-11 22:21:17 by jwe]
author | jwe |
---|---|
date | Fri, 11 Jul 2003 22:21:18 +0000 |
parents | fc9a075d10fb |
children | 55695bf73797 |
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/* Copyright (C) 2002 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. */ #if defined (__GNUG__) && defined (USE_PRAGMA_INTERFACE_IMPLEMENTATION) #pragma implementation #endif #ifdef HAVE_CONFIG_H #include <config.h> #endif #include <iostream> #include "lo-sstream.h" #include "lo-utils.h" #include "defun.h" #include "error.h" #include "ov-cs-list.h" #include "unwind-prot.h" DEFINE_OCTAVE_ALLOCATOR (octave_cs_list); DEFINE_OV_TYPEID_FUNCTIONS_AND_DATA (octave_cs_list, "cs-list"); #if 0 octave_value octave_list::subsref (const std::string& type, const std::list<octave_value_list>& idx) { octave_value retval; switch (type[0]) { case '(': { octave_value_list tmp_idx = idx.front (); if (tmp_idx.length () == 1) { idx_vector i = tmp_idx (0).index_vector (); retval = octave_value_list (lst.index (i)); } else error ("only one index allowed for lists"); } break; case '{': { octave_value_list tmp_idx = idx.front (); if (tmp_idx.length () == 1) { idx_vector i = tmp_idx (0).index_vector (); octave_value_list tmp = lst.index (i); if (tmp.length () == 1) retval = tmp(0); } else error ("only one index allowed for lists"); } break; case '.': { std::string nm = type_name (); error ("%s cannot be indexed with %c", nm.c_str (), type[0]); } break; default: panic_impossible (); } return retval.next_subsref (type, idx); } octave_value octave_list::do_index_op (const octave_value_list& idx, int resize_ok) { octave_value retval; if (idx.length () == 1) { idx_vector i = idx (0).index_vector (); retval = octave_value_list (lst.index (i, resize_ok)); } else error ("lists may only be indexed by a single scalar"); return retval; } octave_value octave_list::subsasgn (const std::string& type, const std::list<octave_value_list>& idx, const octave_value& rhs) { octave_value retval; int n = type.length (); octave_value t_rhs = rhs; if (n > 1) { switch (type[0]) { case '(': { octave_value tmp = do_index_op (idx.front (), true); if (! tmp.is_defined ()) tmp = octave_value::empty_conv (type.substr (1), rhs); if (! error_state) { std::list<octave_value_list> next_idx (idx); next_idx.erase (next_idx.begin ()); t_rhs = tmp.subsasgn (type.substr (1), next_idx, rhs); } } break; case '{': case '.': { std::string nm = type_name (); error ("%s cannot be indexed with %c", nm.c_str (), type[0]); } break; default: panic_impossible (); } } if (! error_state) { switch (type[0]) { case '(': { octave_value_list i = idx.front (); assign (i, t_rhs); retval = octave_value (this, count + 1); } break; case '{': case '.': { std::string nm = type_name (); error ("%s cannot be indexed with %c", nm.c_str (), type[0]); } break; default: panic_impossible (); } } return retval; } void octave_list::assign (const octave_value_list& idx, const octave_value& rhs) { if (idx.length () == 1) { int i = idx(0).int_value (true); if (! error_state) { int n = lst.length (); if (i > 0) { if (Vwarn_resize_on_range_error && i > n) warning ("list index = %d out of range", i); lst(i-1) = rhs; } else error ("list index = %d out of range", i); } else error ("list index must be an integer"); } else error ("lists may only be indexed by a single scalar"); } void octave_list::print (std::ostream& os, bool) const { print_raw (os); } void octave_list::print_raw (std::ostream& os, bool) const { unwind_protect::begin_frame ("octave_list_print"); int n = lst.length (); if (n > 0) { indent (os); os << "("; newline (os); increment_indent_level (); for (int i = 0; i < n; i++) { OSSTREAM buf; buf << "[" << i+1 << "]" << OSSTREAM_ENDS; octave_value val = lst(i); val.print_with_name (os, OSSTREAM_STR (buf)); OSSTREAM_FREEZE (buf); } decrement_indent_level (); indent (os); os << ")"; } else os << "()"; newline (os); unwind_protect::run_frame ("octave_list_print"); } bool octave_list::print_name_tag (std::ostream& os, const std::string& name) const { indent (os); if (lst.length () == 0) os << name << " = "; else { os << name << " ="; newline (os); } return false; } DEFUN (list, args, , "-*- texinfo -*-\n\ @deftypefn {Built-in Function} {} list (@var{a1}, @var{a2}, @dots{})\n\ Create a new list with elements given by the arguments @var{a1},\n\ @var{a2}, @dots{}.\n\ @end deftypefn") { return octave_value (args); } DEFUN (nth, args, , "-*- texinfo -*-\n\ @deftypefn {Built-in Function} {} nth (@var{list}, @var{n})\n\ Return the @var{n}-th element of @var{list}.\n\ @end deftypefn") { octave_value retval; if (args.length () == 2) { octave_value_list lst = args(0).list_value (); if (! error_state) { int n = args(1).int_value (true); if (! error_state) { if (n > 0 && n <= lst.length ()) retval = lst(n-1); else error ("nth: index = %d out of range", n); } else error ("nth: second argument must be an integer"); } else error ("nth: first argument must be a list"); } else print_usage ("nth"); return retval; } DEFUN (append, args, , "-*- texinfo -*-\n\ @deftypefn {Built-in Function} {} append (@var{list}, @var{a1}, @var{a2}, @dots{})\n\ Return a new list created by appending @var{a1}, @var{a1}, @dots{}, to\n\ @var{list}. If any of the arguments to be appended is a list, its\n\ elements are appended individually. For example,\n\ \n\ @example\n\ x = list (1, 2);\n\ y = list (3, 4);\n\ append (x, y);\n\ @end example\n\ \n\ @noindent\n\ results in the list containing the four elements @samp{(1 2 3 4)}, not\n\ a list containing the three elements @samp{(1 2 (3 4))}.\n\ @end deftypefn") { octave_value retval; int nargin = args.length (); if (nargin > 1) { octave_value_list tmp = args(0).list_value (); if (! error_state) { for (int i = 1; i < nargin; i++) { octave_value ov = args(i); if (ov.is_list ()) tmp.append (ov.list_value ()); else tmp.append (ov); } retval = tmp; } } else print_usage ("append"); return retval; } DEFUN (reverse, args, , "-*- texinfo -*-\n\ @deftypefn {Built-in Function} {} reverse (@var{list})\n\ Return a new list created by reversing the elements of @var{list}.\n\ @end deftypefn") { octave_value retval; int nargin = args.length (); if (nargin == 1) { octave_value_list tmp = args(0).list_value (); if (! error_state) retval = tmp.reverse (); } else print_usage ("reverse"); return retval; } DEFUN (splice, args, , "-*- texinfo -*-\n\ @deftypefn {Built-in Function} {} splice (@var{list_1}, @var{offset}, @var{length}, @var{list_2})\n\ Replace @var{length} elements of @var{list_1} beginning at\n\ @var{offset} with the contents of @var{list_2} (if any). If\n\ @var{length} is omitted, all elements from @var{offset} to the end of\n\ @var{list_1} are replaced. As a special case, if @var{offset} is one\n\ greater than the length of @var{list_1} and @var{length} is 0, splice\n\ is equivalent to @code{append (@var{list_1}, @var{list_2})}.\n\ @end deftypefn") { octave_value retval; int nargin = args.length (); if (nargin > 1 && nargin < 5) { octave_value_list list_1 = args(0).list_value (); if (! error_state) { int offset = args(1).int_value (true); if (! error_state) { offset--; int length = 0; octave_value_list list_2; if (nargin < 3) length = list_1.length () - offset; else { length = args(2).int_value (true); if (! error_state) { if (nargin == 4) { list_2 = args(3).list_value (); if (error_state) error ("splice: fourth argument must be a list"); } } else error ("splice: LENGTH must be an integer"); } if (! error_state) retval = list_1.splice (offset, length, list_2); } else error ("splice: OFFSET must be an integer"); } else error ("splice: first argument must be a list"); } else print_usage ("splice"); return retval; } #endif /* ;;; Local Variables: *** ;;; mode: C++ *** ;;; End: *** */