file: zpl_file_read_contents now ignores folders

Author: zpl-zak

CHANGELOG

@@ -1,3 +1,4 @@
+19.4.1  - file: zpl_file_read_contents now ignores folders.
 19.4.0  - json: introduce support for ZPL_JSON_INDENT_STYLE_COMPACT output (rheatley-pervasid)
         - fix SJSON value parse not detecting EOF correctly when analysing delimiter used.
             example: "foo=123,bar=456" would produce 1 extra garbage field.

code/source/core/file.c

@@ -429,6 +429,13 @@ zpl_file_contents zpl_file_read_contents(zpl_allocator a, zpl_b32 zero_terminate
 
     result.allocator = a;
 
+    zpl_u8 entry_type = zpl_fs_get_type(filepath);
+
+    /* ignore folders */
+    if (entry_type == ZPL_DIR_TYPE_FOLDER) {
+        return result;
+    }
+
     if (zpl_file_open(&file, filepath) == ZPL_FILE_ERROR_NONE) {
         zpl_isize file_size = cast(zpl_isize) zpl_file_size(&file);
         if (file_size > 0) {