From de56230876d4e06fa78a41a3af6a1c439dfe8f41 Mon Sep 17 00:00:00 2001
From: Takashi Yano <takashi.yano@nifty.ne.jp>
Date: Fri, 4 Sep 2020 18:11:01 +0900
Subject: [PATCH] Cygwin: pty: Replace pty specific locale functions with
 nl_langinfo().

- Remove pty specific functions get_locale_from_env() and get_langinfo(),
  which are called from setup_locale(), and use nl_langinfo() instead.
---
 winsup/cygwin/fhandler_tty.cc | 119 ++--------------------------------
 1 file changed, 4 insertions(+), 115 deletions(-)

diff --git a/winsup/cygwin/fhandler_tty.cc b/winsup/cygwin/fhandler_tty.cc
index 8bf39c3e6..fd74a9f3d 100644
--- a/winsup/cygwin/fhandler_tty.cc
+++ b/winsup/cygwin/fhandler_tty.cc
@@ -26,6 +26,7 @@ details. */
 #include <asm/socket.h>
 #include "cygwait.h"
 #include "registry.h"
+#include <langinfo.h>
 
 #ifndef PROC_THREAD_ATTRIBUTE_PSEUDOCONSOLE
 #define PROC_THREAD_ATTRIBUTE_PSEUDOCONSOLE 0x00020016
@@ -1813,127 +1814,15 @@ cs_names[] = {
   {       0, "NULL"}
 };
 
-static void
-get_locale_from_env (char *locale)
-{
-  const char *env = NULL;
-  char lang[ENCODING_LEN + 1] = {0, }, country[ENCODING_LEN + 1] = {0, };
-  env = getenv ("LC_ALL");
-  if (env == NULL || !*env)
-    env = getenv ("LC_CTYPE");
-  if (env == NULL || !*env)
-    env = getenv ("LANG");
-  if (env == NULL || !*env)
-    {
-      if (GetLocaleInfo (LOCALE_CUSTOM_UI_DEFAULT,
-			  LOCALE_SISO639LANGNAME,
-			  lang, sizeof (lang)))
-	GetLocaleInfo (LOCALE_CUSTOM_UI_DEFAULT,
-		       LOCALE_SISO3166CTRYNAME,
-		       country, sizeof (country));
-      else if (GetLocaleInfo (LOCALE_CUSTOM_DEFAULT,
-			      LOCALE_SISO639LANGNAME,
-			      lang, sizeof (lang)))
-	  GetLocaleInfo (LOCALE_CUSTOM_DEFAULT,
-			 LOCALE_SISO3166CTRYNAME,
-			 country, sizeof (country));
-      else if (GetLocaleInfo (LOCALE_USER_DEFAULT,
-			      LOCALE_SISO639LANGNAME,
-			      lang, sizeof (lang)))
-	  GetLocaleInfo (LOCALE_USER_DEFAULT,
-			 LOCALE_SISO3166CTRYNAME,
-			 country, sizeof (country));
-      else if (GetLocaleInfo (LOCALE_SYSTEM_DEFAULT,
-			      LOCALE_SISO639LANGNAME,
-			      lang, sizeof (lang)))
-	  GetLocaleInfo (LOCALE_SYSTEM_DEFAULT,
-			 LOCALE_SISO3166CTRYNAME,
-			 country, sizeof (country));
-      if (strlen (lang) && strlen (country))
-	__small_sprintf (lang + strlen (lang), "_%s.UTF-8", country);
-      else
-	strcpy (lang , "C.UTF-8");
-      env = lang;
-    }
-  strcpy (locale, env);
-}
-
-static void
-get_langinfo (char *locale_out, char *charset_out)
-{
-  /* Get locale from environment */
-  char new_locale[ENCODING_LEN + 1];
-  get_locale_from_env (new_locale);
-
-  __locale_t loc;
-  memset (&loc, 0, sizeof (loc));
-  const char *locale = __loadlocale (&loc, LC_CTYPE, new_locale);
-  if (!locale)
-    locale = "C";
-
-  const char *charset;
-  struct lc_ctype_T *lc_ctype = (struct lc_ctype_T *) loc.lc_cat[LC_CTYPE].ptr;
-  if (!lc_ctype)
-    charset = "ASCII";
-  else
-    charset = lc_ctype->codeset;
-
-  /* The following code is borrowed from nl_langinfo()
-     in newlib/libc/locale/nl_langinfo.c */
-  /* Convert charset to Linux compatible codeset string. */
-  if (charset[0] == 'A'/*SCII*/)
-    charset = "ANSI_X3.4-1968";
-  else if (charset[0] == 'E')
-    {
-      if (strcmp (charset, "EUCJP") == 0)
-	charset = "EUC-JP";
-      else if (strcmp (charset, "EUCKR") == 0)
-	charset = "EUC-KR";
-      else if (strcmp (charset, "EUCCN") == 0)
-	charset = "GB2312";
-    }
-  else if (charset[0] == 'C'/*Pxxxx*/)
-    {
-      if (strcmp (charset + 2, "874") == 0)
-	charset = "TIS-620";
-      else if (strcmp (charset + 2, "20866") == 0)
-	charset = "KOI8-R";
-      else if (strcmp (charset + 2, "21866") == 0)
-	charset = "KOI8-U";
-      else if (strcmp (charset + 2, "101") == 0)
-	charset = "GEORGIAN-PS";
-      else if (strcmp (charset + 2, "102") == 0)
-	charset = "PT154";
-    }
-  else if (charset[0] == 'S'/*JIS*/)
-    {
-      /* Cygwin uses MSFT's implementation of SJIS, which differs
-	 in some codepoints from the real thing, especially
-	 0x5c: yen sign instead of backslash,
-	 0x7e: overline instead of tilde.
-	 We can't use the real SJIS since otherwise Win32
-	 pathnames would become invalid.  OTOH, if we return
-	 "SJIS" here, then libiconv will do mb<->wc conversion
-	 differently to our internal functions.  Therefore we
-	 return what we really implement, CP932.  This is handled
-	 fine by libiconv. */
-      charset = "CP932";
-    }
-
-  /* Set results */
-  strcpy (locale_out, new_locale);
-  strcpy (charset_out, charset);
-}
-
 void
 fhandler_pty_slave::setup_locale (void)
 {
   if (get_ttyp ()->term_code_page != 0)
     return;
 
-  char locale[ENCODING_LEN + 1] = "C";
-  char charset[ENCODING_LEN + 1] = "ASCII";
-  get_langinfo (locale, charset);
+  extern void initial_setlocale ();
+  initial_setlocale ();
+  const char *charset = nl_langinfo (_NL_CTYPE_CODESET_NAME);
 
   /* Set terminal code page from locale */
   /* This code is borrowed from mintty: charset.c */
-- 
2.28.0