3 commits

Author	SHA1	Message	Date
Heinrich Schuchardt	f58c5ecb87	efi_loader: new function utf8_to_utf16 ... Provide a conversion function from utf8 to utf16. Add missing #include <linux/types.h> in include/charset.h. Remove superfluous #include <common.h> in lib/charset.c. Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de> Signed-off-by: Alexander Graf <agraf@suse.de>	2017-12-01 13:22:55 +01:00
Heinrich Schuchardt	984f251fee	efi_loader: MAX_UTF8_PER_UTF16 = 3 ... The constant MAX_UTF8_PER_UTF16 is used to calculate required memory when converting from UTF-16 to UTF-8. If this constant is too big we waste memory. A code point encoded by one UTF-16 symbol is converted to a maximum of three UTF-8 symbols, e.g. 0xffff could be encoded as 0xef 0xbf 0xbf. The first byte carries four bits, the second and third byte carry six bits each. A code point encoded by two UTF-16 symbols is converted to four UTF-8 symbols. So in this case we need a maximum of two UTF-8 symbols per UTF-16 symbol. As the overall maximum is three UTF-8 symobls per UTF-16 symbol we need MAX_UTF8_PER_UTF16 = 3. Fixes: 78178bb0c9 lib: add some utf16 handling helpers Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de> Signed-off-by: Alexander Graf <agraf@suse.de>	2017-10-10 10:01:27 +02:00
Rob Clark	78178bb0c9	lib: add some utf16 handling helpers ... We'll eventually want these in a few places in efi_loader, and also vsprintf. Signed-off-by: Rob Clark <robdclark@gmail.com>	2017-09-12 17:57:59 -04:00