ecco_darwin/MATLAB/readbin.m

function fld=readbin(fnam,siz,typ,prec,skip,mform)

% Function fld=readbin(fnam,siz,typ,prec,skip,mform)
% read in N-D binary field
%
% INPUTS
% fnam  input path and file name
% siz   grid dimension (default [360 224 46])
% typ   0: sequential FORTRAN;  1: plain binary (the default)
% prec  numeric precision (see fread; default: 'real*4')
% skip  records to skip before reading (default 0)
% mform machine format (see fopen; default: 'ieee-be')
%
% OUTPUTS
% fld    output array of dimension siz
%
% SEE ALSO
% read_ijk read_ijkt writebin

if nargin < 6, mform='ieee-be'; end
if nargin < 5, skip=0; end
if nargin < 4, prec='real*4'; end
if nargin < 3, typ=1; end
if nargin < 2, siz=[360 224 46]; end
if nargin < 1, error('please specify input file name'); end

if ~exist(fnam)
    error(['File ' fnam ' does not exist.'])
end

fid=fopen(fnam,'r',mform);

if skip>0
  if typ==0
    for n=1:skip
      tmp=read_record(fid,prec);
    end
  else
    switch prec
      case {'int8','integer*1'}
        reclength=prod(siz);
      case {'int16','integer*2','uint16','integer*2'}
        reclength=2*prod(siz);
      case {'int32','integer*4','uint32','single','real*4','float32'}
        reclength=4*prod(siz);
      case {'int64','integer*8','uint64','double','real*8','float64'}
        reclength=8*prod(siz);
    end
    if(fseek(fid,skip*reclength,'bof')<0), error('past end of file'); end
  end
end

switch typ
  case 0
    tmp=read_record(fid,prec);
  case 1
    tmp=fread(fid,[siz(1),prod(siz(2:length(siz)))],prec);
end
fid=fclose(fid);

switch length(siz)
  case 2
    fld=reshape(tmp,siz(1),siz(2));
  case 3
    fld=reshape(tmp,siz(1),siz(2),siz(3));
  case 4
    fld=reshape(tmp,siz(1),siz(2),siz(3),siz(4));
  case 5
    fld=reshape(tmp,siz(1),siz(2),siz(3),siz(4),siz(5));
  otherwise
    fld=tmp;
end
1	function fld=readbin(fnam,siz,typ,prec,skip,mform)
2
3	% Function fld=readbin(fnam,siz,typ,prec,skip,mform)
4	% read in N-D binary field
5	%
6	% INPUTS
7	% fnam input path and file name
8	% siz grid dimension (default [360 224 46])
9	% typ 0: sequential FORTRAN; 1: plain binary (the default)
10	% prec numeric precision (see fread; default: 'real*4')
11	% skip records to skip before reading (default 0)
12	% mform machine format (see fopen; default: 'ieee-be')
13	%
14	% OUTPUTS
15	% fld output array of dimension siz
16	%
17	% SEE ALSO
18	% read_ijk read_ijkt writebin
19
20	if nargin < 6, mform='ieee-be'; end
21	if nargin < 5, skip=0; end
22	if nargin < 4, prec='real*4'; end
23	if nargin < 3, typ=1; end
24	if nargin < 2, siz=[360 224 46]; end
25	if nargin < 1, error('please specify input file name'); end
26
27	if ~exist(fnam)
28	error(['File ' fnam ' does not exist.'])
29	end
30
31	fid=fopen(fnam,'r',mform);
32
33	if skip>0
34	if typ==0
35	for n=1:skip
36	tmp=read_record(fid,prec);
37	end
38	else
39	switch prec
40	case {'int8','integer*1'}
41	reclength=prod(siz);
42	case {'int16','integer2','uint16','integer2'}
43	reclength=2*prod(siz);
44	case {'int32','integer4','uint32','single','real4','float32'}
45	reclength=4*prod(siz);
46	case {'int64','integer8','uint64','double','real8','float64'}
47	reclength=8*prod(siz);
48	end
49	if(fseek(fid,skip*reclength,'bof')<0), error('past end of file'); end
50	end
51	end
52
53	switch typ
54	case 0
55	tmp=read_record(fid,prec);
56	case 1
57	tmp=fread(fid,[siz(1),prod(siz(2:length(siz)))],prec);
58	end
59	fid=fclose(fid);
60
61	switch length(siz)
62	case 2
63	fld=reshape(tmp,siz(1),siz(2));
64	case 3
65	fld=reshape(tmp,siz(1),siz(2),siz(3));
66	case 4
67	fld=reshape(tmp,siz(1),siz(2),siz(3),siz(4));
68	case 5
69	fld=reshape(tmp,siz(1),siz(2),siz(3),siz(4),siz(5));
70	otherwise
71	fld=tmp;
72	end