ft_read_kat_constant.m

用matlab做的Frequency domain INterferomEter Simulation SoftwarE,在国外网站下的,还在研究中,不会用,有会用的回复我

%---------------------------------------------------------------------  
% function [value] = FT_read_kat_constant(block,constant_name)
% 
% Reads the value of the given constant 
%
% block: block structure 
% constant_name: string, name of the constant
%
% value: value of the constant (string or numerical value)
%
% Part of the SimTools package
% Andreas Freise 17.06.08 [e-mail]
%---------------------------------------------------------------------  

function [value] = FT_read_kat_constant(block,constant_name)

  baseid='FT_read_kat_constant';
    
  if (~isstruct(block))
    msgid=[baseid,':checkinarg'];
    result='first input argument must be a block structure';
    error(msgid,result);
  end
  
  if (~isstr(constant_name))
    msgid=[baseid,':checkinarg'];
    result='second input argument must be a string';
    error(msgid,result);
  end
  
  bl=length(block);
  if (bl>1)
    msgid=[baseid,':checksize'];
    error(msgid,'first argument must be single FTblock');
  end
  
  lines=[];
  tmp_lines=FT_find_element_in_active_block(block,2,constant_name);
  % check whether we really found the constant
  for i=1:length(tmp_lines)
    [element,estart,eend]=FT_get_element_from_line(block.txt_lines(tmp_lines(i)),1);
    if (strcmp(element,'const'))
      lines=[lines,tmp_lines(i)];
    end
  end
  
  if (length(lines)<1)
    msgid=[baseid,':find_constant'];
    error(msgid,'could not find named constant');
  end

  if (length(lines)>1)
    msgid=[baseid,':find_constant'];
    error(msgid,'found two instances of named constant');
  end

  % getting constant value
  
  value=cell2mat(FT_parse_line(block.txt_lines(lines),3));