use class for reading lexer input * input.h, input.cc (octave_base_input_reader, octave_terminal_reader, octave_file_reader, octave_eval_string_reader): New classes. (octave_gets): Now a member function of octave_base_reader. (get_user_input): Delete function. Move actions to octave_terminal_reader::get_input and octave_eval_string_reader::get_input. function. Call from octave_file_reader::get_input. Don't check whether reading an eval string. (current_eval_string, get_input_from_eval_string): Delete global variables. (get_debug_input): Check CURR_LEXER->input_from_eval_string instead of global get_input_from_eval_string variable. Don't protect get_input_from_eval_string. * lex.h (octave_lexer::input_reader): New data member. (octave_lexer::octave_lexer (void)): Initialize it. (octave_lexer::octave_lexer (const std::string&), octave_lexer::octave_lexer (FILE *)): New constructors. * lex.h, lex.cc (octave_lexer::input_buffer::fill): New function. (octave_lexer::input_buffer::read): Delete. (octave_lexer::read): Rename from octave_read. Call reader to get input, and then hand it to the input_buffer instead of asking the input buffer to read input. Change all callers. (octave_lexer::input_source, octave_lexer::input_from_eval_string): New functions. Call octave_lexer::input_from_eval_string instead of using get_input_from_eval_string. * oct-parse.in.yy (octave_parser::octave_parser (FILE *), octave_parser::octave_parser (const std::string&)): New constructors. (parse_fcn_file): Pass FILE pointer to octave_parser constructor. (eval_string): Pass string to octave_parser constructor instead of setting global current_eval_string variable.

FCN_FILE_DIRS += sparse

sparse_PRIVATE_FCN_FILES = \
	sparse/private/__sprand_impl__.m

sparse_FCN_FILES = \
  sparse/bicg.m \
  sparse/bicgstab.m \
  sparse/cgs.m \
  sparse/colperm.m \
  sparse/etreeplot.m \
  sparse/gmres.m \
  sparse/gplot.m \
  sparse/nonzeros.m \
  sparse/pcg.m \
  sparse/pcr.m \
  sparse/spaugment.m \
  sparse/spconvert.m \
  sparse/spdiags.m \
  sparse/speye.m \
  sparse/spfun.m \
  sparse/spones.m \
  sparse/sprand.m \
  sparse/sprandn.m \
  sparse/sprandsym.m \
  sparse/spstats.m \
  sparse/spy.m \
  sparse/svds.m \
  sparse/treelayout.m \
  sparse/treeplot.m \
	$(sparse_PRIVATE_FCN_FILES)

FCN_FILES += $(sparse_FCN_FILES)

PKG_ADD_FILES += sparse/PKG_ADD

DIRSTAMP_FILES += sparse/$(octave_dirstamp)