/src/cups/cups/language.c

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/*
 * I18N/language support for CUPS.
 *
 * Copyright 2007-2017 by Apple Inc.
 * Copyright 1997-2007 by Easy Software Products.
 *
 * Licensed under Apache License v2.0.  See the file "LICENSE" for more information.
 */

/*
 * Include necessary headers...
 */

#include "cups-private.h"
#include "debug-internal.h"
#ifdef HAVE_LANGINFO_H
#  include <langinfo.h>
#endif /* HAVE_LANGINFO_H */
#ifdef _WIN32
#  include <io.h>
#else
#  include <unistd.h>
#endif /* _WIN32 */
#ifdef HAVE_COREFOUNDATION_H
#  include <CoreFoundation/CoreFoundation.h>
#endif /* HAVE_COREFOUNDATION_H */


/*
 * Local globals...
 */

static cups_mutex_t lang_mutex = CUPS_MUTEX_INITIALIZER;
          /* Mutex to control access to cache */
static cups_lang_t  *lang_cache = NULL;
          /* Language string cache */
static const char * const lang_encodings[] =
      {   /* Encoding strings */
        "us-ascii",   "iso-8859-1",
        "iso-8859-2",   "iso-8859-3",
        "iso-8859-4",   "iso-8859-5",
        "iso-8859-6",   "iso-8859-7",
        "iso-8859-8",   "iso-8859-9",
        "iso-8859-10",  "utf-8",
        "iso-8859-13",  "iso-8859-14",
        "iso-8859-15",  "cp874",
        "cp1250",   "cp1251",
        "cp1252",   "cp1253",
        "cp1254",   "cp1255",
        "cp1256",   "cp1257",
        "cp1258",   "koi8-r",
        "koi8-u",   "iso-8859-11",
        "iso-8859-16",  "mac",
        "unknown",    "unknown",
        "unknown",    "unknown",
        "unknown",    "unknown",
        "unknown",    "unknown",
        "unknown",    "unknown",
        "unknown",    "unknown",
        "unknown",    "unknown",
        "unknown",    "unknown",
        "unknown",    "unknown",
        "unknown",    "unknown",
        "unknown",    "unknown",
        "unknown",    "unknown",
        "unknown",    "unknown",
        "unknown",    "unknown",
        "unknown",    "unknown",
        "unknown",    "unknown",
        "unknown",    "unknown",
        "cp932",    "cp936",
        "cp949",    "cp950",
        "cp1361",   "bg18030",
        "unknown",    "unknown",
        "unknown",    "unknown",
        "unknown",    "unknown",
        "unknown",    "unknown",
        "unknown",    "unknown",
        "unknown",    "unknown",
        "unknown",    "unknown",
        "unknown",    "unknown",
        "unknown",    "unknown",
        "unknown",    "unknown",
        "unknown",    "unknown",
        "unknown",    "unknown",
        "unknown",    "unknown",
        "unknown",    "unknown",
        "unknown",    "unknown",
        "unknown",    "unknown",
        "unknown",    "unknown",
        "unknown",    "unknown",
        "unknown",    "unknown",
        "unknown",    "unknown",
        "unknown",    "unknown",
        "unknown",    "unknown",
        "unknown",    "unknown",
        "unknown",    "unknown",
        "unknown",    "unknown",
        "unknown",    "unknown",
        "unknown",    "unknown",
        "unknown",    "unknown",
        "unknown",    "unknown",
        "euc-cn",   "euc-jp",
        "euc-kr",   "euc-tw",
        "shift_jisx0213"
      };


/*
 * Local functions...
 */


static cups_lang_t  *cups_cache_lookup(const char *name, cups_encoding_t encoding);
static int    cups_message_compare(_cups_message_t *m1, _cups_message_t *m2);
static void   cups_message_free(_cups_message_t *m);
static void   cups_message_load(cups_lang_t *lang);
static void   cups_message_puts(cups_file_t *fp, const char *s);
static int    cups_read_strings(cups_file_t *fp, int flags, cups_array_t *a);
static void   cups_unquote(char *d, const char *s);


/*
 * '_cupsEncodingName()' - Return the character encoding name string
 *                         for the given encoding enumeration.
 */

const char *        /* O - Character encoding */
_cupsEncodingName(
    cups_encoding_t encoding)   /* I - Encoding value */
{
  if (encoding < CUPS_US_ASCII ||
      encoding >= (cups_encoding_t)(sizeof(lang_encodings) / sizeof(lang_encodings[0])))
  {
    DEBUG_printf("1_cupsEncodingName(encoding=%d) = out of range (\"%s\")", encoding, lang_encodings[0]);
    return (lang_encodings[0]);
  }
  else
  {
    DEBUG_printf("1_cupsEncodingName(encoding=%d) = \"%s\"", encoding, lang_encodings[encoding]);
    return (lang_encodings[encoding]);
  }
}


/*
 * 'cupsLangDefault()' - Return the default language.
 */

cups_lang_t *       /* O - Language data */
cupsLangDefault(void)
{
  return (cupsLangGet(NULL));
}


/*
 * 'cupsLangEncoding()' - Return the character encoding (us-ascii, etc.)
 *                        for the given language.
 */

const char *        /* O - Character encoding */
cupsLangEncoding(cups_lang_t *lang) /* I - Language data */
{
  if (lang == NULL)
    return ((char*)lang_encodings[0]);
  else
    return ((char*)lang_encodings[lang->encoding]);
}


/*
 * 'cupsLangFlush()' - Flush all language data out of the cache.
 */

void
cupsLangFlush(void)
{
  cups_lang_t *lang,      /* Current language */
    *next;      /* Next language */


 /*
  * Free all languages in the cache...
  */

  cupsMutexLock(&lang_mutex);

  for (lang = lang_cache; lang != NULL; lang = next)
  {
   /*
    * Free all messages...
    */

    _cupsMessageFree(lang->strings);

   /*
    * Then free the language structure itself...
    */

    next = lang->next;
    free(lang);
  }

  lang_cache = NULL;

  cupsMutexUnlock(&lang_mutex);
}


/*
 * 'cupsLangFree()' - Free language data.
 *
 * This does not actually free anything; use @link cupsLangFlush@ for that.
 */

void
cupsLangFree(cups_lang_t *lang)   /* I - Language to free */
{
  cupsMutexLock(&lang_mutex);

  if (lang != NULL && lang->used > 0)
    lang->used --;

  cupsMutexUnlock(&lang_mutex);
}


/*
 * 'cupsLangGet()' - Get a language.
 */

cups_lang_t *       /* O - Language data */
cupsLangGet(const char *language) /* I - Language or locale */
{
  int     i;    /* Looping var */
  char      locale[255];  /* Copy of locale name */
  char      langname[16], /* Requested language name */
      country[16],  /* Country code */
      charset[16],  /* Character set */
      *csptr,   /* Pointer to CODESET string */
      *ptr,   /* Pointer into language/charset */
      real[48]; /* Real language name */
  cups_encoding_t encoding; /* Encoding to use */
  cups_lang_t   *lang;    /* Current language... */
  static const char * const locale_encodings[] =
    {     /* Locale charset names */
      "ASCII",  "ISO88591", "ISO88592", "ISO88593",
      "ISO88594", "ISO88595", "ISO88596", "ISO88597",
      "ISO88598", "ISO88599", "ISO885910",  "UTF8",
      "ISO885913",  "ISO885914",  "ISO885915",  "CP874",
      "CP1250", "CP1251", "CP1252", "CP1253",
      "CP1254", "CP1255", "CP1256", "CP1257",
      "CP1258", "KOI8R",  "KOI8U",  "ISO885911",
      "ISO885916",  "MACROMAN", "",   "",

      "",   "",   "",   "",
      "",   "",   "",   "",
      "",   "",   "",   "",
      "",   "",   "",   "",
      "",   "",   "",   "",
      "",   "",   "",   "",
      "",   "",   "",   "",
      "",   "",   "",   "",

      "CP932",  "CP936",  "CP949",  "CP950",
      "CP1361", "GB18030",  "",   "",
      "",   "",   "",   "",
      "",   "",   "",   "",
      "",   "",   "",   "",
      "",   "",   "",   "",
      "",   "",   "",   "",
      "",   "",   "",   "",

      "",   "",   "",   "",
      "",   "",   "",   "",
      "",   "",   "",   "",
      "",   "",   "",   "",
      "",   "",   "",   "",
      "",   "",   "",   "",
      "",   "",   "",   "",
      "",   "",   "",   "",

      "EUCCN",  "EUCJP",  "EUCKR",  "EUCTW",
      "SHIFT_JISX0213"
    };


  DEBUG_printf("2cupsLangGet(language=\"%s\")", language);

 /*
  * Set the charset to "unknown"...
  */

  charset[0] = '\0';

 /*
  * Use setlocale() to determine the currently set locale, and then
  * fallback to environment variables to avoid setting the locale,
  * since setlocale() is not thread-safe!
  */

  if (!language)
  {
   /*
    * First see if the locale has been set; if it is still "C" or
    * "POSIX", use the environment to get the default...
    */

#ifdef LC_MESSAGES
    ptr = setlocale(LC_MESSAGES, NULL);
#else
    ptr = setlocale(LC_ALL, NULL);
#endif /* LC_MESSAGES */

    DEBUG_printf("4cupsLangGet: current locale is \"%s\"", ptr);

    if (!ptr || !strcmp(ptr, "C") || !strcmp(ptr, "POSIX"))
    {
     /*
      * Get the character set from the LC_CTYPE locale setting...
      */

      if ((ptr = getenv("LC_CTYPE")) == NULL)
        if ((ptr = getenv("LC_ALL")) == NULL)
    if ((ptr = getenv("LANG")) == NULL)
      ptr = "en_US";

      if ((csptr = strchr(ptr, '.')) != NULL)
      {
       /*
        * Extract the character set from the environment...
  */

  for (ptr = charset, csptr ++; *csptr; csptr ++)
    if (ptr < (charset + sizeof(charset) - 1) && _cups_isalnum(*csptr))
      *ptr++ = *csptr;

        *ptr = '\0';
      }

     /*
      * Get the locale for messages from the LC_MESSAGES locale setting...
      */

      if ((ptr = getenv("LC_MESSAGES")) == NULL)
        if ((ptr = getenv("LC_ALL")) == NULL)
    if ((ptr = getenv("LANG")) == NULL)
      ptr = "en_US";
    }

    if (ptr)
    {
      cupsCopyString(locale, ptr, sizeof(locale));
      language = locale;

     /*
      * CUPS STR #2575: Map "nb" to "no" for back-compatibility...
      */

      if (!strncmp(locale, "nb", 2))
        locale[1] = 'o';

      DEBUG_printf("4cupsLangGet: new language value is \"%s\"", language);
    }
  }

 /*
  * If "language" is NULL at this point, then chances are we are using
  * a language that is not installed for the base OS.
  */

  if (!language)
  {
   /*
    * Switch to the POSIX ("C") locale...
    */

    language = "C";
  }

#ifdef CODESET
 /*
  * On systems that support the nl_langinfo(CODESET) call, use
  * this value as the character set...
  */

  if (!charset[0] && (csptr = nl_langinfo(CODESET)) != NULL)
  {
   /*
    * Copy all of the letters and numbers in the CODESET string...
    */

    for (ptr = charset; *csptr; csptr ++)
      if (_cups_isalnum(*csptr) && ptr < (charset + sizeof(charset) - 1))
        *ptr++ = *csptr;

    *ptr = '\0';

    DEBUG_printf("4cupsLangGet: charset set to \"%s\" via nl_langinfo(CODESET)...", charset);
  }
#endif /* CODESET */

 /*
  * If we don't have a character set by now, default to UTF-8...
  */

  if (!charset[0])
    cupsCopyString(charset, "UTF8", sizeof(charset));

 /*
  * Parse the language string passed in to a locale string. "C" is the
  * standard POSIX locale and is copied unchanged.  Otherwise the
  * language string is converted from ll-cc[.charset] (language-country)
  * to ll_CC[.CHARSET] to match the file naming convention used by all
  * POSIX-compliant operating systems.  Invalid language names are mapped
  * to the POSIX locale.
  */

  country[0] = '\0';

  if (language == NULL || !language[0] ||
      !strcmp(language, "POSIX"))
    cupsCopyString(langname, "C", sizeof(langname));
  else
  {
   /*
    * Copy the parts of the locale string over safely...
    */

    for (ptr = langname; *language; language ++)
      if (*language == '_' || *language == '-' || *language == '.')
  break;
      else if (ptr < (langname + sizeof(langname) - 1))
        *ptr++ = (char)tolower(*language & 255);

    *ptr = '\0';

    if (*language == '_' || *language == '-')
    {
     /*
      * Copy the country code...
      */

      for (language ++, ptr = country; *language; language ++)
  if (*language == '.')
    break;
  else if (ptr < (country + sizeof(country) - 1))
          *ptr++ = (char)toupper(*language & 255);

      *ptr = '\0';

     /*
      * Map Chinese region codes to legacy country codes.
      */

      if (!strcmp(language, "zh") && !strcmp(country, "HANS"))
        cupsCopyString(country, "CN", sizeof(country));
      if (!strcmp(language, "zh") && !strcmp(country, "HANT"))
        cupsCopyString(country, "TW", sizeof(country));
    }

    if (*language == '.' && !charset[0])
    {
     /*
      * Copy the encoding...
      */

      for (language ++, ptr = charset; *language; language ++)
        if (_cups_isalnum(*language) && ptr < (charset + sizeof(charset) - 1))
          *ptr++ = (char)toupper(*language & 255);

      *ptr = '\0';
    }

   /*
    * Force a POSIX locale for an invalid language name...
    */

    if (strlen(langname) != 2 && strlen(langname) != 3)
    {
      cupsCopyString(langname, "C", sizeof(langname));
      country[0] = '\0';
      charset[0] = '\0';
    }
  }

  DEBUG_printf("4cupsLangGet: langname=\"%s\", country=\"%s\", charset=\"%s\"", langname, country, charset);

 /*
  * Figure out the desired encoding...
  */

  encoding = CUPS_AUTO_ENCODING;

  if (charset[0])
  {
    for (i = 0;
         i < (int)(sizeof(locale_encodings) / sizeof(locale_encodings[0]));
   i ++)
      if (!_cups_strcasecmp(charset, locale_encodings[i]))
      {
  encoding = (cups_encoding_t)i;
  break;
      }

    if (encoding == CUPS_AUTO_ENCODING)
    {
     /*
      * Map alternate names for various character sets...
      */

      if (!_cups_strcasecmp(charset, "iso-2022-jp") ||
          !_cups_strcasecmp(charset, "sjis"))
  encoding = CUPS_WINDOWS_932;
      else if (!_cups_strcasecmp(charset, "iso-2022-cn"))
  encoding = CUPS_WINDOWS_936;
      else if (!_cups_strcasecmp(charset, "iso-2022-kr"))
  encoding = CUPS_WINDOWS_949;
      else if (!_cups_strcasecmp(charset, "big5"))
  encoding = CUPS_WINDOWS_950;
    }
  }

  DEBUG_printf("4cupsLangGet: encoding=%d(%s)", encoding, encoding == CUPS_AUTO_ENCODING ? "auto" : lang_encodings[encoding]);

 /*
  * See if we already have this language/country loaded...
  */

  if (country[0])
    snprintf(real, sizeof(real), "%s_%s", langname, country);
  else
    cupsCopyString(real, langname, sizeof(real));

  cupsMutexLock(&lang_mutex);

  if ((lang = cups_cache_lookup(real, encoding)) != NULL)
  {
    cupsMutexUnlock(&lang_mutex);

    DEBUG_printf("3cupsLangGet: Using cached copy of \"%s\"...", real);

    return (lang);
  }

 /*
  * See if there is a free language available; if so, use that
  * record...
  */

  for (lang = lang_cache; lang != NULL; lang = lang->next)
    if (lang->used == 0)
      break;

  if (lang == NULL)
  {
   /*
    * Allocate memory for the language and add it to the cache.
    */

    if ((lang = calloc(1, sizeof(cups_lang_t))) == NULL)
    {
      cupsMutexUnlock(&lang_mutex);

      return (NULL);
    }

    lang->next = lang_cache;
    lang_cache = lang;
  }
  else
  {
   /*
    * Free all old strings as needed...
    */

    _cupsMessageFree(lang->strings);
    lang->strings = NULL;
  }

 /*
  * Then assign the language and encoding fields...
  */

  lang->used ++;
  cupsCopyString(lang->language, real, sizeof(lang->language));

  if (encoding != CUPS_AUTO_ENCODING)
    lang->encoding = encoding;
  else
    lang->encoding = CUPS_UTF8;

 /*
  * Return...
  */

  cupsMutexUnlock(&lang_mutex);

  return (lang);
}


/*
 * '_cupsLangString()' - Get a message string.
 *
 * The returned string is UTF-8 encoded; use cupsUTF8ToCharset() to
 * convert the string to the language encoding.
 */

const char *        /* O - Localized message */
_cupsLangString(cups_lang_t *lang,  /* I - Language */
                const char  *message) /* I - Message */
{
  const char *s;      /* Localized message */


  DEBUG_printf("_cupsLangString(lang=%p, message=\"%s\")", (void *)lang, message);

 /*
  * Range check input...
  */

  if (!lang || !message || !*message)
    return (message);

  cupsMutexLock(&lang_mutex);

 /*
  * Load the message catalog if needed...
  */

  if (!lang->strings)
    cups_message_load(lang);

  s = _cupsMessageLookup(lang->strings, message);

  cupsMutexUnlock(&lang_mutex);

  return (s);
}


/*
 * '_cupsMessageFree()' - Free a messages array.
 */

void
_cupsMessageFree(cups_array_t *a) /* I - Message array */
{
 /*
  * Free the array...
  */

  cupsArrayDelete(a);
}


/*
 * '_cupsMessageLoad()' - Load a .po or .strings file into a messages array.
 */

cups_array_t *        /* O - New message array */
_cupsMessageLoad(const char *filename,  /* I - Message catalog to load */
                 int        flags)  /* I - Load flags */
{
  cups_file_t   *fp;    /* Message file */
  cups_array_t    *a;   /* Message array */
  _cups_message_t *m;   /* Current message */
  char      s[4096],  /* String buffer */
      *ptr,   /* Pointer into buffer */
      *temp;    /* New string */
  size_t    length,   /* Length of combined strings */
      ptrlen;   /* Length of string */


  DEBUG_printf("4_cupsMessageLoad(filename=\"%s\")", filename);

 /*
  * Create an array to hold the messages...
  */

  if ((a = _cupsMessageNew(NULL)) == NULL)
  {
    DEBUG_puts("5_cupsMessageLoad: Unable to allocate array!");
    return (NULL);
  }

 /*
  * Open the message catalog file...
  */

  if ((fp = cupsFileOpen(filename, "r")) == NULL)
  {
    DEBUG_printf("5_cupsMessageLoad: Unable to open file: %s", strerror(errno));
    return (a);
  }

  if (flags & _CUPS_MESSAGE_STRINGS)
  {
    while (cups_read_strings(fp, flags, a));
  }
  else
  {
   /*
    * Read messages from the catalog file until EOF...
    *
    * The format is the GNU gettext .po format, which is fairly simple:
    *
    *     msgid "some text"
    *     msgstr "localized text"
    *
    * The ID and localized text can span multiple lines using the form:
    *
    *     msgid ""
    *     "some long text"
    *     msgstr ""
    *     "localized text spanning "
    *     "multiple lines"
    */

    m = NULL;

    while (cupsFileGets(fp, s, sizeof(s)) != NULL)
    {
     /*
      * Skip blank and comment lines...
      */

      if (s[0] == '#' || !s[0])
  continue;

     /*
      * Strip the trailing quote...
      */

      if ((ptr = strrchr(s, '\"')) == NULL)
  continue;

      *ptr = '\0';

     /*
      * Find start of value...
      */

      if ((ptr = strchr(s, '\"')) == NULL)
  continue;

      ptr ++;

     /*
      * Unquote the text...
      */

      if (flags & _CUPS_MESSAGE_UNQUOTE)
  cups_unquote(ptr, ptr);

     /*
      * Create or add to a message...
      */

      if (!strncmp(s, "msgid", 5))
      {
       /*
  * Add previous message as needed...
  */

  if (m)
  {
    if (m->str && (m->str[0] || (flags & _CUPS_MESSAGE_EMPTY)))
    {
      cupsArrayAdd(a, m);
    }
    else
    {
     /*
      * Translation is empty, don't add it... (STR #4033)
      */

      free(m->msg);
      if (m->str)
        free(m->str);
      free(m);
    }
  }

       /*
  * Create a new message with the given msgid string...
  */

  if ((m = (_cups_message_t *)calloc(1, sizeof(_cups_message_t))) == NULL)
    break;

  if ((m->msg = strdup(ptr)) == NULL)
  {
    free(m);
    m = NULL;
    break;
  }
      }
      else if (s[0] == '\"' && m)
      {
       /*
  * Append to current string...
  */

  length = strlen(m->str ? m->str : m->msg);
  ptrlen = strlen(ptr);

  if ((temp = realloc(m->str ? m->str : m->msg, length + ptrlen + 1)) == NULL)
  {
    if (m->str)
      free(m->str);
    free(m->msg);
    free(m);
    m = NULL;
    break;
  }

  if (m->str)
  {
   /*
    * Copy the new portion to the end of the msgstr string - safe
    * to use memcpy because the buffer is allocated to the correct
    * size...
    */

    m->str = temp;

    memcpy(m->str + length, ptr, ptrlen + 1);
  }
  else
  {
   /*
    * Copy the new portion to the end of the msgid string - safe
    * to use memcpy because the buffer is allocated to the correct
    * size...
    */

    m->msg = temp;

    memcpy(m->msg + length, ptr, ptrlen + 1);
  }
      }
      else if (!strncmp(s, "msgstr", 6) && m)
      {
       /*
  * Set the string...
  */

  if ((m->str = strdup(ptr)) == NULL)
  {
    free(m->msg);
    free(m);
    m = NULL;
          break;
  }
      }
    }

   /*
    * Add the last message string to the array as needed...
    */

    if (m)
    {
      if (m->str && (m->str[0] || (flags & _CUPS_MESSAGE_EMPTY)))
      {
  cupsArrayAdd(a, m);
      }
      else
      {
       /*
  * Translation is empty, don't add it... (STR #4033)
  */

  free(m->msg);
  if (m->str)
    free(m->str);
  free(m);
      }
    }
  }

 /*
  * Close the message catalog file and return the new array...
  */

  cupsFileClose(fp);

  DEBUG_printf("5_cupsMessageLoad: Returning %d messages...", cupsArrayCount(a));

  return (a);
}


/*
 * '_cupsMessageLookup()' - Lookup a message string.
 */

const char *        /* O - Localized message */
_cupsMessageLookup(cups_array_t *a, /* I - Message array */
                   const char   *m) /* I - Message */
{
  _cups_message_t key,    /* Search key */
      *match;   /* Matching message */


  DEBUG_printf("_cupsMessageLookup(a=%p, m=\"%s\")", (void *)a, m);

 /*
  * Lookup the message string; if it doesn't exist in the catalog,
  * then return the message that was passed to us...
  */

  key.msg = (char *)m;
  match   = (_cups_message_t *)cupsArrayFind(a, &key);

  if (match && match->str)
    return (match->str);
  else
    return (m);
}


/*
 * '_cupsMessageNew()' - Make a new message catalog array.
 */

cups_array_t *        /* O - Array */
_cupsMessageNew(void *context)    /* I - User data */
{
  return (cupsArrayNew3((cups_array_func_t)cups_message_compare, context,
                        (cups_ahash_func_t)NULL, 0,
      (cups_acopy_func_t)NULL,
      (cups_afree_func_t)cups_message_free));
}


/*
 * '_cupsMessageSave()' - Save a message catalog array.
 */

int         /* O - 0 on success, -1 on failure */
_cupsMessageSave(const char   *filename,/* I - Output filename */
                 int          flags,  /* I - Format flags */
                 cups_array_t *a) /* I - Message array */
{
  cups_file_t   *fp;    /* Output file */
  _cups_message_t *m;   /* Current message */


 /*
  * Output message catalog file...
  */

  if ((fp = cupsFileOpen(filename, "w")) == NULL)
    return (-1);

 /*
  * Write each message...
  */

  if (flags & _CUPS_MESSAGE_STRINGS)
  {
    for (m = (_cups_message_t *)cupsArrayFirst(a); m; m = (_cups_message_t *)cupsArrayNext(a))
    {
      cupsFilePuts(fp, "\"");
      cups_message_puts(fp, m->msg);
      cupsFilePuts(fp, "\" = \"");
      cups_message_puts(fp, m->str);
      cupsFilePuts(fp, "\";\n");
    }
  }
  else
  {
    for (m = (_cups_message_t *)cupsArrayFirst(a); m; m = (_cups_message_t *)cupsArrayNext(a))
    {
      cupsFilePuts(fp, "msgid \"");
      cups_message_puts(fp, m->msg);
      cupsFilePuts(fp, "\"\nmsgstr \"");
      cups_message_puts(fp, m->str);
      cupsFilePuts(fp, "\"\n");
    }
  }

  return (cupsFileClose(fp));
}


/*
 * 'cups_cache_lookup()' - Lookup a language in the cache...
 */

static cups_lang_t *      /* O - Language data or NULL */
cups_cache_lookup(
    const char      *name,    /* I - Name of locale */
    cups_encoding_t encoding)   /* I - Encoding of locale */
{
  cups_lang_t *lang;      /* Current language */


  DEBUG_printf("7cups_cache_lookup(name=\"%s\", encoding=%d(%s))", name, encoding, encoding == CUPS_AUTO_ENCODING ? "auto" : lang_encodings[encoding]);

 /*
  * Loop through the cache and return a match if found...
  */

  for (lang = lang_cache; lang != NULL; lang = lang->next)
  {
    DEBUG_printf("9cups_cache_lookup: lang=%p, language=\"%s\", encoding=%d(%s)", (void *)lang, lang->language, lang->encoding, lang_encodings[lang->encoding]);

    if (!strcmp(lang->language, name) &&
        (encoding == CUPS_AUTO_ENCODING || encoding == lang->encoding))
    {
      lang->used ++;

      DEBUG_puts("8cups_cache_lookup: returning match!");

      return (lang);
    }
  }

  DEBUG_puts("8cups_cache_lookup: returning NULL!");

  return (NULL);
}


/*
 * 'cups_message_compare()' - Compare two messages.
 */

static int        /* O - Result of comparison */
cups_message_compare(
    _cups_message_t *m1,    /* I - First message */
    _cups_message_t *m2)    /* I - Second message */
{
  return (strcmp(m1->msg, m2->msg));
}


/*
 * 'cups_message_free()' - Free a message.
 */

static void
cups_message_free(_cups_message_t *m) /* I - Message */
{
  if (m->msg)
    free(m->msg);

  if (m->str)
    free(m->str);

  free(m);
}


/*
 * 'cups_message_load()' - Load the message catalog for a language.
 */

static void
cups_message_load(cups_lang_t *lang)  /* I - Language */
{
  char      filename[1024]; /* Filename for language locale file */
  _cups_globals_t *cg = _cupsGlobals();
            /* Pointer to library globals */


  snprintf(filename, sizeof(filename), "%s/%s/cups_%s.po", cg->localedir,
     lang->language, lang->language);

  if (strchr(lang->language, '_') && access(filename, 0))
  {
   /*
    * Country localization not available, look for generic localization...
    */

    snprintf(filename, sizeof(filename), "%s/%.2s/cups_%.2s.po", cg->localedir,
             lang->language, lang->language);

    if (access(filename, 0))
    {
     /*
      * No generic localization, so use POSIX...
      */

      DEBUG_printf("4cups_message_load: access(\"%s\", 0): %s", filename, strerror(errno));

      snprintf(filename, sizeof(filename), "%s/C/cups_C.po", cg->localedir);
    }
  }

 /*
  * Read the strings from the file...
  */

  lang->strings = _cupsMessageLoad(filename, _CUPS_MESSAGE_UNQUOTE);
}


/*
 * 'cups_message_puts()' - Write a message string with quoting.
 */

static void
cups_message_puts(cups_file_t *fp,  /* I - File to write to */
                  const char  *s) /* I - String to write */
{
  const char  *start,     /* Start of substring */
    *ptr;     /* Pointer into string */


  for (start = s, ptr = s; *ptr; ptr ++)
  {
    if (strchr("\\\"\n\t", *ptr))
    {
      if (ptr > start)
      {
  cupsFileWrite(fp, start, (size_t)(ptr - start));
  start = ptr + 1;
      }

      if (*ptr == '\\')
        cupsFileWrite(fp, "\\\\", 2);
      else if (*ptr == '\"')
        cupsFileWrite(fp, "\\\"", 2);
      else if (*ptr == '\n')
        cupsFileWrite(fp, "\\n", 2);
      else /* if (*ptr == '\t') */
        cupsFileWrite(fp, "\\t", 2);
    }
  }

  if (ptr > start)
    cupsFileWrite(fp, start, (size_t)(ptr - start));
}


/*
 * 'cups_read_strings()' - Read a pair of strings from a .strings file.
 */

static int        /* O - 1 on success, 0 on failure */
cups_read_strings(cups_file_t  *fp, /* I - .strings file */
                  int          flags, /* I - CUPS_MESSAGE_xxx flags */
      cups_array_t *a)  /* I - Message catalog array */
{
  char      buffer[8192], /* Line buffer */
      *bufptr,  /* Pointer into buffer */
      *msg,   /* Pointer to start of message */
      *str;   /* Pointer to start of translation string */
  _cups_message_t *m;   /* New message */


  while (cupsFileGets(fp, buffer, sizeof(buffer)))
  {
   /*
    * Skip any line (comments, blanks, etc.) that isn't:
    *
    *   "message" = "translation";
    */

    for (bufptr = buffer; *bufptr && isspace(*bufptr & 255); bufptr ++);

    if (*bufptr != '\"')
      continue;

   /*
    * Find the end of the message...
    */

    bufptr ++;
    for (msg = bufptr; *bufptr && *bufptr != '\"'; bufptr ++)
      if (*bufptr == '\\' && bufptr[1])
        bufptr ++;

    if (!*bufptr)
      continue;

    *bufptr++ = '\0';

    if (flags & _CUPS_MESSAGE_UNQUOTE)
      cups_unquote(msg, msg);

   /*
    * Find the start of the translation...
    */

    while (*bufptr && isspace(*bufptr & 255))
      bufptr ++;

    if (*bufptr != '=')
      continue;

    bufptr ++;
    while (*bufptr && isspace(*bufptr & 255))
      bufptr ++;

    if (*bufptr != '\"')
      continue;

   /*
    * Find the end of the translation...
    */

    bufptr ++;
    for (str = bufptr; *bufptr && *bufptr != '\"'; bufptr ++)
      if (*bufptr == '\\' && bufptr[1])
        bufptr ++;

    if (!*bufptr)
      continue;

    *bufptr++ = '\0';

    if (flags & _CUPS_MESSAGE_UNQUOTE)
      cups_unquote(str, str);

   /*
    * If we get this far we have a valid pair of strings, add them...
    */

    if ((m = malloc(sizeof(_cups_message_t))) == NULL)
      break;

    m->msg = strdup(msg);
    m->str = strdup(str);

    if (m->msg && m->str)
    {
      cupsArrayAdd(a, m);
    }
    else
    {
      if (m->msg)
  free(m->msg);

      if (m->str)
  free(m->str);

      free(m);
      break;
    }

    return (1);
  }

 /*
  * No more strings...
  */

  return (0);
}


/*
 * 'cups_unquote()' - Unquote characters in strings...
 */

static void
cups_unquote(char       *d,   /* O - Unquoted string */
             const char *s)   /* I - Original string */
{
  while (*s)
  {
    if (*s == '\\')
    {
      s ++;
      if (isdigit(*s))
      {
  *d = 0;

  while (isdigit(*s))
  {
    *d = *d * 8 + *s - '0';
    s ++;
  }

  d ++;
      }
      else
      {
  if (*s == 'n')
    *d ++ = '\n';
  else if (*s == 'r')
    *d ++ = '\r';
  else if (*s == 't')
    *d ++ = '\t';
  else
    *d++ = *s;

  s ++;
      }
    }
    else
      *d++ = *s++;
  }

  *d = '\0';
}

Coverage Report

Created: 2023-11-27 06:38