sh: Add \u/\U support (in $'...') for UTF-8.

Because we have no iconv in base, support for other charsets is not
possible.

Note that \u/\U are processed using the locale that was active when the
shell started. This is necessary to avoid behaviour that depends on the
parse/execute split (for example when placing braces around an entire
script). Therefore, UTF-8 encoding is implemented manually.

1 files changed, 3 insertions, 0 deletions

diff --git a/bin/sh/var.h b/bin/sh/var.h
index 323ddc2..ff21c7d 100644
--- a/bin/sh/var.h
+++ b/bin/sh/var.h
@@ -83,6 +83,8 @@ extern struct var vterm;
 #endif
 
 extern int localeisutf8;
+/* The parser uses the locale that was in effect at startup. */
+extern int initial_localeisutf8;
 
 /*
  * The following macros access the values of the above variables.
@@ -116,6 +118,7 @@ char *bltinlookup(const char *, int);
 void bltinsetlocale(void);
 void bltinunsetlocale(void);
 void updatecharset(void);
+void initcharset(void);
 char **environment(void);
 int showvarscmd(int, char **);
 int exportcmd(int, char **);