/* Determine a canonical name for the current locale's character encoding.
- Copyright (C) 2000-2006, 2008-2019 Free Software Foundation, Inc.
+ Copyright (C) 2000-2006, 2008-2020 Free Software Foundation, Inc.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
#elif defined WINDOWS_NATIVE
# define WIN32_LEAN_AND_MEAN
# include <windows.h>
+ /* For the use of setlocale() below, the Gnulib override in setlocale.c is
+ not needed; see the platform lists in setlocale_null.m4. */
+# undef setlocale
#endif
#if defined OS2
# define INCL_DOS
{ "ISO8859-2", "ISO-8859-2" },
{ "ISO8859-4", "ISO-8859-4" },
{ "ISO8859-5", "ISO-8859-5" },
- { "ISO8859-7", "ISO-8859-7" }
+ { "ISO8859-7", "ISO-8859-7" },
+ { "US-ASCII", "ASCII" }
# define alias_table_defined
# endif
# if defined __APPLE__ && defined __MACH__ /* Mac OS X */
/* Determine the current locale's character encoding, and canonicalize it
- into one of the canonical names listed in localcharset.h.
- The result must not be freed; it is statically allocated.
+ into one of the canonical names listed below.
+ The result must not be freed; it is statically allocated. The result
+ becomes invalid when setlocale() is used to change the global locale, or
+ when the value of one of the environment variables LC_ALL, LC_CTYPE, LANG
+ is changed; threads in multithreaded programs should not do this.
If the canonical name cannot be determined, the result is a non-canonical
name. */
{
const char *codeset;
+ /* This function must be multithread-safe. To achieve this without using
+ thread-local storage, we use a simple strcpy or memcpy to fill this static
+ buffer. Filling it through, for example, strcpy + strcat would not be
+ guaranteed to leave the buffer's contents intact if another thread is
+ currently accessing it. If necessary, the contents is first assembled in
+ a stack-allocated buffer. */
+
#if HAVE_LANGINFO_CODESET || defined WINDOWS_NATIVE || defined OS2
# if HAVE_LANGINFO_CODESET
if (codeset != NULL && strcmp (codeset, "US-ASCII") == 0)
{
const char *locale;
- static char buf[2 + 10 + 1];
+ static char resultbuf[2 + 10 + 1];
locale = getenv ("LC_ALL");
if (locale == NULL || locale[0] == '\0')
modifier = strchr (dot, '@');
if (modifier == NULL)
return dot;
- if (modifier - dot < sizeof (buf))
+ if (modifier - dot < sizeof (resultbuf))
{
- memcpy (buf, dot, modifier - dot);
- buf [modifier - dot] = '\0';
- return buf;
+ /* This way of filling resultbuf is multithread-safe. */
+ memcpy (resultbuf, dot, modifier - dot);
+ resultbuf [modifier - dot] = '\0';
+ return resultbuf;
}
}
}
converting to GetConsoleOutputCP(). This leads to correct results,
except when SetConsoleOutputCP has been called and a raster font is
in use. */
- sprintf (buf, "CP%u", GetACP ());
- codeset = buf;
+ {
+ char buf[2 + 10 + 1];
+
+ sprintf (buf, "CP%u", GetACP ());
+ strcpy (resultbuf, buf);
+ codeset = resultbuf;
+ }
}
# endif
# elif defined WINDOWS_NATIVE
- static char buf[2 + 10 + 1];
+ char buf[2 + 10 + 1];
+ static char resultbuf[2 + 10 + 1];
/* The Windows API has a function returning the locale's codepage as
a number, but the value doesn't change according to what the
'setlocale' call specified. So we use it as a last resort, in
case the string returned by 'setlocale' doesn't specify the
codepage. */
- char *current_locale = setlocale (LC_ALL, NULL);
- char *pdot;
-
- /* If they set different locales for different categories,
- 'setlocale' will return a semi-colon separated list of locale
- values. To make sure we use the correct one, we choose LC_CTYPE. */
- if (strchr (current_locale, ';'))
- current_locale = setlocale (LC_CTYPE, NULL);
+ char *current_locale = setlocale (LC_CTYPE, NULL);
+ char *pdot = strrchr (current_locale, '.');
- pdot = strrchr (current_locale, '.');
if (pdot && 2 + strlen (pdot + 1) + 1 <= sizeof (buf))
sprintf (buf, "CP%s", pdot + 1);
else
{
/* The Windows API has a function returning the locale's codepage as a
- number: GetACP().
- When the output goes to a console window, it needs to be provided in
- GetOEMCP() encoding if the console is using a raster font, or in
- GetConsoleOutputCP() encoding if it is using a TrueType font.
- But in GUI programs and for output sent to files and pipes, GetACP()
- encoding is the best bet. */
+ number: GetACP().
+ When the output goes to a console window, it needs to be provided in
+ GetOEMCP() encoding if the console is using a raster font, or in
+ GetConsoleOutputCP() encoding if it is using a TrueType font.
+ But in GUI programs and for output sent to files and pipes, GetACP()
+ encoding is the best bet. */
sprintf (buf, "CP%u", GetACP ());
}
/* For a locale name such as "French_France.65001", in Windows 10,
if (strcmp (buf + 2, "65001") == 0 || strcmp (buf + 2, "utf8") == 0)
codeset = "UTF-8";
else
- codeset = buf;
+ {
+ strcpy (resultbuf, buf);
+ codeset = resultbuf;
+ }
# elif defined OS2
const char *locale;
- static char buf[2 + 10 + 1];
+ static char resultbuf[2 + 10 + 1];
ULONG cp[3];
ULONG cplen;
modifier = strchr (dot, '@');
if (modifier == NULL)
return dot;
- if (modifier - dot < sizeof (buf))
+ if (modifier - dot < sizeof (resultbuf))
{
- memcpy (buf, dot, modifier - dot);
- buf [modifier - dot] = '\0';
- return buf;
+ /* This way of filling resultbuf is multithread-safe. */
+ memcpy (resultbuf, dot, modifier - dot);
+ resultbuf [modifier - dot] = '\0';
+ return resultbuf;
}
}
codeset = "";
else
{
+ char buf[2 + 10 + 1];
+
sprintf (buf, "CP%u", cp[0]);
- codeset = buf;
+ strcpy (resultbuf, buf);
+ codeset = resultbuf;
}
}
projects / deliverable / binutils-gdb.git / blobdiff