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upgrade jsonlab to 2.9.8-git20220210
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,70 @@ | ||
| function json=jsonget(fname,mmap,varargin) | ||
| % | ||
| % json=jsonget(fname,mmap,'$.jsonpath1','$.jsonpath2',...) | ||
| % | ||
| % Fast reading of JSON data records using memory-map (mmap) returned by | ||
| % loadjson and JSONPath-like keys | ||
| % | ||
| % authors:Qianqian Fang (q.fang <at> neu.edu) | ||
| % initially created on 2022/02/02 | ||
| % | ||
| % input: | ||
| % fname: a JSON/BJData/UBJSON string or stream, or a file name | ||
| % mmap: memory-map returned by loadjson/loadbj of the same data | ||
| % important: mmap must be produced from the same file/string, | ||
| % otherwise calling this function may cause data corruption | ||
| % '$.jsonpath1,2,3,...': a series of strings in the form of JSONPath | ||
| % as the key to each of the record to be retrieved | ||
| % | ||
| % output: | ||
| % json: a cell array, made of elements {'$.jsonpath_i',json_string_i} | ||
| % | ||
| % examples: | ||
| % str='[[1,2],"a",{"c":2}]{"k":"test"}'; | ||
| % [dat, mmap]=loadjson(str); | ||
| % savejson('',dat,'filename','mydata.json','compact',1); | ||
| % json=jsonget(str,mmap,'$.[0].[*]','$.[2].c') | ||
| % json=jsonget('mydata.json',mmap,'$.[0].[*]','$.[2].c') | ||
| % | ||
| % license: | ||
| % BSD or GPL version 3, see LICENSE_{BSD,GPLv3}.txt files for details | ||
| % | ||
| % -- this function is part of JSONLab toolbox (http://iso2mesh.sf.net/cgi-bin/index.cgi?jsonlab) | ||
| % | ||
|
|
||
| if(regexp(fname,'^\s*(?:\[.*\])|(?:\{.*\})\s*$','once')) | ||
| inputstr=fname; | ||
| elseif(isoctavemesh) | ||
| if(exist(fname,'file')) | ||
| try | ||
| fid = fopen(fname,'rb'); | ||
| inputstr = fread(fid,'char',inf)'; | ||
| fclose(fid); | ||
| catch | ||
| try | ||
| inputstr = urlread(['file://',fname]); | ||
| catch | ||
| inputstr = urlread(['file://',fullfile(pwd,fname)]); | ||
| end | ||
| end | ||
| end | ||
| end | ||
|
|
||
| mmap=[mmap{:}]; | ||
| keylist=mmap(1:2:end); | ||
|
|
||
| json={}; | ||
| for i=1:length(varargin) | ||
| if(regexp(varargin{i},'^\$')) | ||
| [tf,loc]=ismember(varargin{i},keylist); | ||
| if(tf) | ||
| rec={'uint8',[1,mmap{loc*2}(2)], 'x'}; | ||
| if(exist('inputstr','var')) | ||
| json{end+1}={varargin{i}, inputstr(mmap{loc*2}(1):mmap{loc*2}(1)+mmap{loc*2}(2)-1)}; | ||
| else | ||
| fmap=memmapfile(fname,'writable',false, 'offset',mmap{loc*2}(1),'format', rec); | ||
| json{end+1}={varargin{i}, char(fmap.Data(1).x)}; | ||
| end | ||
| end | ||
| end | ||
| end |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,89 @@ | ||
| function json=jsonset(fname,mmap,varargin) | ||
| % | ||
| % json=jsonset(fname,mmap,'$.jsonpath1',newval1,'$.jsonpath2','newval2',...) | ||
| % | ||
| % Fast writing of JSON data records to stream or disk using memory-map | ||
| % (mmap) returned by loadjson and JSONPath-like keys | ||
| % | ||
| % authors:Qianqian Fang (q.fang <at> neu.edu) | ||
| % initially created on 2022/02/02 | ||
| % | ||
| % input: | ||
| % fname: a JSON/BJData/UBJSON string or stream, or a file name | ||
| % mmap: memory-map returned by loadjson/loadbj of the same data | ||
| % important: mmap must be produced from the same file/string, | ||
| % otherwise calling this function may cause data corruption | ||
| % '$.jsonpath1,2,3,...': a series of strings in the form of JSONPath | ||
| % as the key to each of the record to be written | ||
| % | ||
| % output: | ||
| % json: the modified JSON string or, in the case fname is a filename, | ||
| % the cell string made of jsonpaths that are successfully | ||
| % written | ||
| % | ||
| % examples: | ||
| % str='[[1,2],"a",{"c":2}]{"k":"test"}'; | ||
| % [dat, mmap]=loadjson(str); | ||
| % savejson('',dat,'filename','mydata.json','compact',1); | ||
| % json=jsonset(str,mmap,'$.[2].c','5') | ||
| % json=jsonset('mydata.json',mmap,'$.[2].c','"c":5') | ||
| % | ||
| % license: | ||
| % BSD or GPL version 3, see LICENSE_{BSD,GPLv3}.txt files for details | ||
| % | ||
| % -- this function is part of JSONLab toolbox (http://iso2mesh.sf.net/cgi-bin/index.cgi?jsonlab) | ||
| % | ||
|
|
||
| if(regexp(fname,'^\s*(?:\[.*\])|(?:\{.*\})\s*$','once')) | ||
| inputstr=fname; | ||
| else | ||
| fid=fopen(fname,'wb'); | ||
| end | ||
|
|
||
| mmap=[mmap{:}]; | ||
| keylist=mmap(1:2:end); | ||
|
|
||
| opt=struct; | ||
| for i=1:2:length(varargin) | ||
| if(isempty(regexp(varargin{i},'^\$', 'once'))) | ||
| opt.(encodevarname(varargin{i}))=varargin{i+1}; | ||
| end | ||
| end | ||
|
|
||
| json={}; | ||
| for i=1:2:length(varargin) | ||
| if(regexp(varargin{i},'^\$')) | ||
| [tf,loc]=ismember(varargin{i},keylist); | ||
| if(tf) | ||
| rec={'uint8',[1,mmap{loc*2}(2)], 'x'}; | ||
| if(ischar(varargin{i+1})) | ||
| val=varargin{i+1}; | ||
| else | ||
| val=savejson('',varargin{i+1},'compact',1); | ||
| end | ||
| if(length(val)<=rec{1,2}(2)) | ||
| val=[val repmat(' ',[1,rec{1,2}(2)-length(val)])]; | ||
| if(exist('inputstr','var')) | ||
| inputstr(mmap{loc*2}(1):mmap{loc*2}(1)+mmap{loc*2}(2)-1)=val; | ||
| else | ||
| if(exist('memmapfile','file')) | ||
| fmap=memmapfile(fname,'writable',true,'offset',mmap{loc*2}(1),'format', rec); | ||
| fmap.x=val; | ||
| else | ||
| fseek(fid,mmap{loc*2}(1)-1,'bof'); | ||
| fwrite(fid,val); | ||
| end | ||
| json{end+1}={varargin{i},val}; | ||
| end | ||
| end | ||
| end | ||
| end | ||
| end | ||
|
|
||
| if(exist('fid','var') && fid>=0) | ||
| fclose(fid); | ||
| end | ||
|
|
||
| if(exist('inputstr','var')) | ||
| json=inputstr; | ||
| end |
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