matlab-grid-generator/bin/f77write.m

% f77write(filename,array,options) writes an array to filename
%  filename - is a string containing the name of the file to be read
%  array    - is a array containing of arbitrary dimensions
%  options  - (optional) specifies the data-type or the binary format
%
%  Default data-type and binary format are 'real*8' and 'native'.
%
% Other data types can be one of:
%       'real*4' - floating point, 32 bits.
%       'real*8' - floating point, 64 bits.
%
% Other binary formats can be one of:
%    'native'      or 'n' - local machine format - the default
%    'ieee-le'     or 'l' - IEEE floating point with little-endian
%                           byte ordering
%    'ieee-be'     or 'b' - IEEE floating point with big-endian
%                           byte ordering
%    'cray'        or 'c' - Cray floating point with big-endian
%                           byte ordering
%    'ieee-le.l64' or 'a' - IEEE floating point with little-endian
%                           byte ordering and 64 bit long data type
%    'ieee-be.l64' or 's' - IEEE floating point with big-endian byte
%                           ordering and 64 bit long data type.
%
%
% eg.  Write a real*8 dataset of size 160 x 10 x 16
%        f77write('T.bin',A);
%
% eg.  Write a real*4 dataset of size 120 x 45 in Little endian format
%        f77write('T.bin',B,'real*4','l');
%
function [] = read3d(file,arr,varargin)

% Defaults
rtype='real*8'; % This is the default type of data
ieee='n'; % This is the default binary representation

% Check optional arguments
args=char(varargin);
while (size(args,1) > 0)
 if deblank(args(1,:)) == 'real*4'
  rtype='real*4';
 elseif deblank(args(1,:)) == 'real*8'
  rtype='real*8';
 elseif deblank(args(1,:)) == 'n' | deblank(args(1,:)) == 'native'
  ieee='n';
 elseif deblank(args(1,:)) == 'l' | deblank(args(1,:)) == 'ieee-le'
  ieee='l';
 elseif deblank(args(1,:)) == 'b' | deblank(args(1,:)) == 'ieee-be'
  ieee='b';
 elseif deblank(args(1,:)) == 'c' | deblank(args(1,:)) == 'cray'
  ieee='c';
 elseif deblank(args(1,:)) == 'a' | deblank(args(1,:)) == 'ieee-le.l64'
  ieee='a';
 elseif deblank(args(1,:)) == 's' | deblank(args(1,:)) == 'ieee-be.l64'
  ieee='s';
 else
  sprintf(['Optional argument ' args(1,:) ' is unknown'])
  return
 end
 args=args(2:end,:);
end

if rtype == 'real*4'
 wordsize=4;
elseif rtype == 'real*8'
 wordsize=8;
else
 sprintf('Somehow, rtype has an illegal value...!')
 return
end
fid=fopen(file,'w',ieee);
% write the initial 4 bytes used in f77_unformatted
fwrite(fid,prod(size(arr))*wordsize,'uint32');
% write the data
fwrite(fid,arr,rtype);
% write the last 4 bytes used in f77_unformatted
fwrite(fid,prod(size(arr))*wordsize,'uint32');
% close the file
st=fclose(fid);
1	% f77write(filename,array,options) writes an array to filename
2	% filename - is a string containing the name of the file to be read
3	% array - is a array containing of arbitrary dimensions
4	% options - (optional) specifies the data-type or the binary format
5	%
6	% Default data-type and binary format are 'real*8' and 'native'.
7	%
8	% Other data types can be one of:
9	% 'real*4' - floating point, 32 bits.
10	% 'real*8' - floating point, 64 bits.
11	%
12	% Other binary formats can be one of:
13	% 'native' or 'n' - local machine format - the default
14	% 'ieee-le' or 'l' - IEEE floating point with little-endian
15	% byte ordering
16	% 'ieee-be' or 'b' - IEEE floating point with big-endian
17	% byte ordering
18	% 'cray' or 'c' - Cray floating point with big-endian
19	% byte ordering
20	% 'ieee-le.l64' or 'a' - IEEE floating point with little-endian
21	% byte ordering and 64 bit long data type
22	% 'ieee-be.l64' or 's' - IEEE floating point with big-endian byte
23	% ordering and 64 bit long data type.
24	%
25	%
26	% eg. Write a real*8 dataset of size 160 x 10 x 16
27	% f77write('T.bin',A);
28	%
29	% eg. Write a real*4 dataset of size 120 x 45 in Little endian format
30	% f77write('T.bin',B,'real*4','l');
31	%
32	function [] = read3d(file,arr,varargin)
33
34	% Defaults
35	rtype='real*8'; % This is the default type of data
36	ieee='n'; % This is the default binary representation
37
38	% Check optional arguments
39	args=char(varargin);
40	while (size(args,1) > 0)
41	if deblank(args(1,:)) == 'real*4'
42	rtype='real*4';
43	elseif deblank(args(1,:)) == 'real*8'
44	rtype='real*8';
45	elseif deblank(args(1,:)) == 'n' \| deblank(args(1,:)) == 'native'
46	ieee='n';
47	elseif deblank(args(1,:)) == 'l' \| deblank(args(1,:)) == 'ieee-le'
48	ieee='l';
49	elseif deblank(args(1,:)) == 'b' \| deblank(args(1,:)) == 'ieee-be'
50	ieee='b';
51	elseif deblank(args(1,:)) == 'c' \| deblank(args(1,:)) == 'cray'
52	ieee='c';
53	elseif deblank(args(1,:)) == 'a' \| deblank(args(1,:)) == 'ieee-le.l64'
54	ieee='a';
55	elseif deblank(args(1,:)) == 's' \| deblank(args(1,:)) == 'ieee-be.l64'
56	ieee='s';
57	else
58	sprintf(['Optional argument ' args(1,:) ' is unknown'])
59	return
60	end
61	args=args(2:end,:);
62	end
63
64	if rtype == 'real*4'
65	wordsize=4;
66	elseif rtype == 'real*8'
67	wordsize=8;
68	else
69	sprintf('Somehow, rtype has an illegal value...!')
70	return
71	end
72	fid=fopen(file,'w',ieee);
73	% write the initial 4 bytes used in f77_unformatted
74	fwrite(fid,prod(size(arr))*wordsize,'uint32');
75	% write the data
76	fwrite(fid,arr,rtype);
77	% write the last 4 bytes used in f77_unformatted
78	fwrite(fid,prod(size(arr))*wordsize,'uint32');
79	% close the file
80	st=fclose(fid);