MITgcm_contrib/grid_bathymetry_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
% 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, t=1; end
if nargin < 0, error('please specify input file name'); 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	% 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, t=1; end
26	if nargin < 0, error('please specify input file name'); end
27
28	fid=fopen(fnam,'r',mform);
29
30	if skip>0
31	if typ==0
32	for n=1:skip
33	tmp=read_record(fid,prec);
34	end
35	else
36	switch prec
37	case {'int8','integer*1'}
38	reclength=prod(siz);
39	case {'int16','integer2','uint16','integer2'}
40	reclength=2*prod(siz);
41	case {'int32','integer4','uint32','single','real4','float32'}
42	reclength=4*prod(siz);
43	case {'int64','integer8','uint64','double','real8','float64'}
44	reclength=8*prod(siz);
45	end
46	if(fseek(fid,skip*reclength,'bof')<0), error('past end of file'); end
47	end
48	end
49
50	switch typ
51	case 0
52	tmp=read_record(fid,prec);
53	case 1
54	tmp=fread(fid,[siz(1),prod(siz(2:length(siz)))],prec);
55	end
56	fid=fclose(fid);
57
58	switch length(siz)
59	case 2
60	fld=reshape(tmp,siz(1),siz(2));
61	case 3
62	fld=reshape(tmp,siz(1),siz(2),siz(3));
63	case 4
64	fld=reshape(tmp,siz(1),siz(2),siz(3),siz(4));
65	case 5
66	fld=reshape(tmp,siz(1),siz(2),siz(3),siz(4),siz(5));
67	otherwise
68	fld=tmp;
69	end