9.11 Filenames encoding

An encoding form parameter can be used to specify the filename encoding ‘encoding=xxx’.

• If the form parameter ‘encoding=utf8’ appears in the form string, the filename must be encoded in UTF-8.
• If the form parameter ‘encoding=8bits’ appears in the form string, the filename must be a standard 8bits string.

In the absence of a ‘encoding=xxx’ form parameter, the encoding is controlled by the ‘GNAT_CODE_PAGE’ environment variable. And if not set ‘utf8’ is assumed.

‘CP_ACP’

The current system Windows ANSI code page.

‘CP_UTF8’

UTF-8 encoding

This encoding form parameter is only supported on the Windows platform. On the other Operating Systems the run-time is supporting UTF-8 natively.