[bug] accept trailing backslash in string, prevent jdatadecode infinite recursion

Author: fangq

jdatadecode.m

@@ -223,7 +223,7 @@
                 data(j).(N_ArrayData) = jdatadecode(data(j).(N_ArrayData), opt);
             end
             if (isstruct(data(j).(N_ArrayData)) && isfield(data(j).(N_ArrayData), N_ArrayType))
-                data(j).(N_ArrayData) = jdatadecode(data(j).(N_ArrayData), varargin{:});
+                data(j).(N_ArrayData) = jdatadecode(data(j).(N_ArrayData), opt);
             end
             if (iscell(data(j).(N_ArrayData)))
                 data(j).(N_ArrayData) = cell2mat(cellfun(@(x) double(x(:)), data(j).(N_ArrayData), 'uniformoutput', 0)).';
@@ -503,7 +503,7 @@
             edgedata = data(j).(N_GraphEdges0);
             isdirected = 0;
         elseif (isfield(data, N_GraphMatrix))
-            edgedata = jdatadecode(data(j).(N_GraphMatrix), varargin{:});
+            edgedata = jdatadecode(data(j).(N_GraphMatrix), opt);
         end
 
         if (exist('edgedata', 'var'))

loadjson.m

@@ -823,9 +823,23 @@
 if ~ischar(str) || isempty(find(str == '\', 1))
     return
 end
+
+% Handle lone trailing backslash: temporarily remove it before sprintf
+% But not if preceded by \ (i.e. \\) which is an escaped backslash
+len = length(str);
+trailing = (str(end) == 92) && (len < 2 || str(end - 1) ~= 92);  % 92 = '\'
+if trailing
+    str = str(1:end - 1);
+end
+
 newstr = sprintf(str);
 newstr = regexprep(newstr, '\\u([0-9A-Fa-f]{4})', '${char(base2dec($1,16))}');
 
+% Restore trailing backslash
+if trailing
+    newstr = [newstr, '\'];
+end
+
 %% -------------------------------------------------------------------------
 
 function arraystr = sscanf_prep(str)