/*

 * Copyright (c) 2010 Ævar Arnfjörð Bjarmason

 */

#define DISABLE_SIGN_COMPARE_WARNINGS

#include "git-compat-util.h"

#include "abspath.h"

#include "environment.h"

#include "exec-cmd.h"

#include "gettext.h"

#include "utf8.h"

#ifndef NO_GETTEXT

# include <libintl.h>

# ifdef GIT_WINDOWS_NATIVE

static const char *locale_charset(void)

{

  const char *env = getenv("LC_ALL"), *dot;

  if (!env || !*env)

    env = getenv("LC_CTYPE");

  if (!env || !*env)

    env = getenv("LANG");

  if (!env)

    return "UTF-8";

  dot = strchr(env, '.');

  return !dot ? env : dot + 1;

}

# elif defined HAVE_LIBCHARSET_H

#   include <libcharset.h>

# else

#   include <langinfo.h>

#   define locale_charset() nl_langinfo(CODESET)

# endif

#endif

static const char *charset;

/*

 * Guess the user's preferred languages from the value in LANGUAGE environment

 * variable and LC_MESSAGES locale category if NO_GETTEXT is not defined.

 *

 * The result can be a colon-separated list like "ko:ja:en".

 */

const char *get_preferred_languages(void)

{

  const char *retval;

  retval = getenv("LANGUAGE");

  if (retval && *retval)

    return retval;

#ifndef NO_GETTEXT

  retval = setlocale(LC_MESSAGES, NULL);

  if (retval && *retval &&

    strcmp(retval, "C") &&

    strcmp(retval, "POSIX"))

    return retval;

#endif

  return NULL;

}

#ifndef NO_GETTEXT

__attribute__((format (printf, 1, 2)))

static int test_vsnprintf(const char *fmt, ...)

{

  char buf[26];

  int ret;

  va_list ap;

  va_start(ap, fmt);

  ret = vsnprintf(buf, sizeof(buf), fmt, ap);

  va_end(ap);

  return ret;

}

static void init_gettext_charset(const char *domain)

{

  charset = locale_charset();

  bind_textdomain_codeset(domain, charset);

  /*

   * Work around an old bug fixed in glibc 2.17 (released on

   * 2012-12-24), at the cost of potentially making translated

   * messages from external functions like perror() emitted in

   * the wrong encoding.

   *

   * The bug affected e.g. git.git's own 7eb93c89651 ([PATCH]

   * Simplify git script, 2005-09-07), which is the origin of

   * the "David_K\345gedal" test string.

   *

   * See a much longer comment added to this file in 5e9637c6297

   * (i18n: add infrastructure for translating Git with gettext,

   * 2011-11-18) for more details.

   */

  if (test_vsnprintf("%.*s", 13, "David_K\345gedal") < 0)

    setlocale(LC_CTYPE, "C");

}

int git_gettext_enabled = 0;

void git_setup_gettext(void)

{

  const char *podir = getenv(GIT_TEXT_DOMAIN_DIR_ENVIRONMENT);

  char *p = NULL;

  if (!podir)

    podir = p = system_path(GIT_LOCALE_PATH);

  if (!is_directory(podir)) {

    free(p);

    return;

  }

  bindtextdomain("git", podir);

  setlocale(LC_MESSAGES, "");

  setlocale(LC_TIME, "");

  init_gettext_charset("git");

  textdomain("git");

  git_gettext_enabled = 1;

  free(p);

}

/* return the number of columns of string 's' in current locale */

int gettext_width(const char *s)

{

  static int is_utf8 = -1;

  if (is_utf8 == -1)

    is_utf8 = is_utf8_locale();

  return is_utf8 ? utf8_strwidth(s) : strlen(s);

}

#endif

int is_utf8_locale(void)

{

#ifdef NO_GETTEXT

  if (!charset) {

    const char *env = getenv("LC_ALL");

    if (!env || !*env)

      env = getenv("LC_CTYPE");

    if (!env || !*env)

      env = getenv("LANG");

    if (!env)

      env = "";

    if (strchr(env, '.'))

      env = strchr(env, '.') + 1;

    charset = xstrdup(env);

  }

#endif

  return is_encoding_utf8(charset);

}