add stdlib.strempty()

Author: scivision

+stdlib/+dotnet/create_symlink.m

@@ -2,7 +2,7 @@
 
 ok = false;
 
-if ~stdlib.exists(target) || strlength(link) == 0 || stdlib.exists(link)
+if ~stdlib.exists(target) || stdlib.strempty(link) || stdlib.exists(link)
   return
 end
 

+stdlib/+dotnet/relative_to.m

@@ -1,10 +1,10 @@
 function rel = relative_to(base, other)
 
-if strempty(other)
+if stdlib.strempty(other)
   rel = base;
   return
 end
-if strempty(base)
+if stdlib.strempty(base)
   rel = other;
   return
 end

+stdlib/+python/create_symlink.m

@@ -2,7 +2,7 @@
 
 ok = false;
 
-if ~stdlib.exists(target) || strlength(link) == 0 || stdlib.exists(link)
+if ~stdlib.exists(target) || stdlib.strempty(link) || stdlib.exists(link)
   return
 end
 

+stdlib/+python/private/pvt_python_version.m

@@ -4,7 +4,7 @@
 
 pe = pyenv();
 vs = pe.Version;
-if strlength(vs) == 0, return, end
+if stdlib.strempty(vs), return, end
 
 vi = py.sys.version_info;
 v = [double(vi.major), double(vi.minor), double(vi.micro)];

+stdlib/+sys/create_symlink.m

@@ -3,7 +3,7 @@
 
 ok = false;
 
-if ~stdlib.exists(target) || strlength(link) == 0 || stdlib.exists(link)
+if ~stdlib.exists(target) || stdlib.strempty(link) || stdlib.exists(link)
   return
 end
 

+stdlib/+sys/relative_to.m

@@ -0,0 +1,26 @@
+function r = relative_to(base, other)
+
+r = "";
+
+if ~stdlib.exists(base) || ~stdlib.exists(other)
+  return
+end
+
+if ispc()
+  cmd = sprintf('pwsh -c "Resolve-Path -Path ''%s'' -RelativeBasePath ''%s'' -Relative"', other, base);
+else
+  cmd = sprintf('realpath --relative-to="%s" "%s"', base, other);
+end
+
+[status, r] = system(cmd);
+if status ~= 0
+  warning("stdlib:relative_to:OSError", "Failed to compute relative path: %s", r);
+end
+
+r = string(strip(r));
+
+if ispc()
+  r = fullfile(stdlib.normalize(r));
+end
+
+end

+stdlib/+sys/samepath.m

@@ -2,7 +2,7 @@
 
 y = false;
 
-if strlength(path1) == 0 || strlength(path2) == 0
+if stdlib.strempty(path1) || stdlib.strempty(path2)
   return
 end
 

+stdlib/canonical.m

@@ -18,7 +18,7 @@
   strict logical = false
 end
 
-if strempty(p)
+if stdlib.stdlib.strempty(p)
   c = "";
   return
 end
@@ -28,7 +28,7 @@
 else
   pth = matlab.io.internal.filesystem.resolvePath(p);
   c = pth.ResolvedPath;
-  if ~strict && strempty(c)
+  if ~strict && stdlib.strempty(c)
     c = stdlib.normalize(p);
   end
 end
@@ -42,7 +42,7 @@
 
 c = "";
 
-if strempty(p), return, end
+if stdlib.strempty(p), return, end
 
 [s, r] = fileattrib(p);
 

+stdlib/create_symlink.m

@@ -26,7 +26,7 @@
     % Matlab Java doesn't recognize the optional argument omitted.
     % see example/Filesystem.java for this working in plain Java.
     % see example/javaCreateSymbolicLink.m for a non-working attempt in Matlab.
-      if strempty(target) || strempty(link), return, end
+      if stdlib.strempty(target) || stdlib.strempty(link), return, end
 
       if stdlib.has_python()
         ok = stdlib.python.create_symlink(target, link);

+stdlib/get_username.m

@@ -12,7 +12,7 @@
   n = stdlib.python.get_username();
 end
 
-if strempty(n)
+if stdlib.strempty(n)
   n = stdlib.sys.get_username();
 end