get_modtime: native functions

Author: scivision

+stdlib/cpu_arch.m

@@ -1,5 +1,4 @@
 %% CPU_ARCH get the CPU architecture
-% optional: java
 
 function a = cpu_arch()
 

+stdlib/device.m

@@ -1,5 +1,4 @@
 %% DEVICE filesystem device index of path
-% optional: java
 
 function i = device(path)
 arguments

+stdlib/drop_slash.m

@@ -1,5 +1,4 @@
 %% DROP_SLASH drop repeated and trailing slash
-% optional: mex
 %
 % on Windows, if leading double slash, do not drop
 

+stdlib/file_checksum.m

@@ -1,5 +1,4 @@
 %% FILE_CHECKSUM compute hash of file
-% optional: java
 %
 % read in chunks to avoid excessive RAM use
 %

+stdlib/filesystem_type.m

@@ -1,5 +1,4 @@
 %% FILESYSTEM_TYPE tell type of filesystem
-% optional: java
 %
 % example outputs: NTFS, ext4, apfs, ...
 

+stdlib/get_modtime.m

@@ -1,5 +1,4 @@
 %% GET_MODTIME get path modification time
-% requires: java
 %
 %%% Inputs
 % * p: path to examine
@@ -11,13 +10,17 @@
   p {mustBeTextScalar}
 end
 
+finf = dir(p);
+if isfolder(p)
+  % find which index of the struct array has member name == '.'
+  i = find(strcmp({finf.name}, '.'), 1);
+  finf = finf(i);
+end
 
-t = javaObject("java.io.File", p).lastModified() / 1000;
-
-if t > 0
-  t = datetime(t, ConvertFrom="PosixTime");
-else
+if isempty(finf)
   t = datetime.empty;
+else
+  t = datetime(finf.datenum, ConvertFrom='datenum');
 end
 
 end

+stdlib/get_username.m

@@ -1,5 +1,4 @@
 %% GET_USERNAME tell username of current user
-% optional: java
 %
 function n = get_username()
 

+stdlib/hostname.m

@@ -1,6 +1,5 @@
 
 %% HOSTNAME get hostname of local machine
-% optional: java
 %
 % Ref: https://docs.oracle.com/javase/8/docs/api/java/net/InetAddress.html#getHostName--
 

+stdlib/is_admin.m

@@ -1,5 +1,4 @@
 %% IS_ADMIN is the process run as root / admin
-% optional: mex
 
 function y = is_admin()
 

+stdlib/ram_free.m

@@ -1,5 +1,4 @@
 %% RAM_FREE get free physical RAM
-% optional: java
 %
 % get free physical RAM across operating systems
 % https://docs.oracle.com/en/java/javase/21/docs/api/jdk.management/com/sun/management/OperatingSystemMXBean.html#getFreeMemorySize()