/* PSPP - a program for statistical analysis.
- Copyright (C) 2006, 2009 Free Software Foundation, Inc.
+ Copyright (C) 2006, 2009, 2010, 2011 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
along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include <config.h>
-#include <xalloc.h>
+
+#include "libpspp/i18n.h"
+
#include <assert.h>
+#include <errno.h>
+#include <iconv.h>
+#include <langinfo.h>
+#include <libintl.h>
#include <locale.h>
-#include <stdlib.h>
#include <stdio.h>
+#include <stdlib.h>
#include <string.h>
-#include <libintl.h>
-#include <iconv.h>
-#include <errno.h>
-#include <relocatable.h>
-#include "assertion.h"
-#include "hmapx.h"
-#include "hash-functions.h"
-
-#include "i18n.h"
+#include <unigbrk.h>
-#include "version.h"
+#include "libpspp/assertion.h"
+#include "libpspp/hmapx.h"
+#include "libpspp/hash-functions.h"
+#include "libpspp/pool.h"
+#include "libpspp/str.h"
+#include "libpspp/version.h"
-#include <localcharset.h>
-#include "xstrndup.h"
-
-#if HAVE_NL_LANGINFO
-#include <langinfo.h>
-#endif
+#include "gl/c-strcase.h"
+#include "gl/localcharset.h"
+#include "gl/xalloc.h"
+#include "gl/relocatable.h"
+#include "gl/xstrndup.h"
struct converter
- {
- const char *tocode;
- const char *fromcode;
+ {
+ char *tocode;
+ char *fromcode;
iconv_t conv;
};
hmapx_insert (&map, converter, hash);
/* I don't think it's safe to translate this string or to use messaging
- as the convertors have not yet been set up */
+ as the converters have not yet been set up */
if ( (iconv_t) -1 == converter->conv && 0 != strcmp (tocode, fromcode))
{
const int err = errno;
fprintf (stderr,
"Warning: "
- "cannot create a convertor for \"%s\" to \"%s\": %s\n",
+ "cannot create a converter for `%s' to `%s': %s\n",
fromcode, tocode, strerror (err));
}
return converter->conv;
}
-/* Return a string based on TEXT converted according to HOW.
- If length is not -1, then it must be the number of bytes in TEXT.
- The returned string must be freed when no longer required.
-*/
+/* Converts the single byte C from encoding FROM to TO, returning the first
+ byte of the result.
+
+ This function probably shouldn't be used at all, but some code still does
+ use it. */
+char
+recode_byte (const char *to, const char *from, char c)
+{
+ char x;
+ char *s = recode_string (to, from, &c, 1);
+ x = s[0];
+ free (s);
+ return x;
+}
+
+/* Similar to recode_string_pool, but allocates the returned value on the heap
+ instead of in a pool. It is the caller's responsibility to free the
+ returned value. */
char *
recode_string (const char *to, const char *from,
const char *text, int length)
{
- char *outbuf = 0;
- size_t outbufferlength;
- size_t result;
- char *op ;
- size_t inbytes = 0;
- size_t outbytes ;
- iconv_t conv ;
+ return recode_string_pool (to, from, text, length, NULL);
+}
+
+/* Returns the length, in bytes, of the string that a similar recode_string()
+ call would return. */
+size_t
+recode_string_len (const char *to, const char *from,
+ const char *text, int length)
+{
+ char *s = recode_string (to, from, text, length);
+ size_t len = strlen (s);
+ free (s);
+ return len;
+}
+
+/* Uses CONV to convert the INBYTES starting at IP into the OUTBYTES starting
+ at OP, and appends a null terminator to the output.
+ Returns the output length if successful, -1 if the output buffer is too
+ small. */
+static ssize_t
+try_recode (iconv_t conv,
+ const char *ip, size_t inbytes,
+ char *op_, size_t outbytes)
+{
/* FIXME: Need to ensure that this char is valid in the target encoding */
const char fallbackchar = '?';
+ char *op = op_;
+
+ /* Put the converter into the initial shift state, in case there was any
+ state information left over from its last usage. */
+ iconv (conv, NULL, 0, NULL, 0);
+
+ while (iconv (conv, (ICONV_CONST char **) &ip, &inbytes,
+ &op, &outbytes) == -1)
+ switch (errno)
+ {
+ case EINVAL:
+ if (outbytes < 2)
+ return -1;
+ *op++ = fallbackchar;
+ *op = '\0';
+ return op - op_;
+
+ case EILSEQ:
+ if (outbytes == 0)
+ return -1;
+ *op++ = fallbackchar;
+ outbytes--;
+ ip++;
+ inbytes--;
+ break;
+
+ case E2BIG:
+ return -1;
+
+ default:
+ /* should never happen */
+ fprintf (stderr, "Character conversion error: %s\n", strerror (errno));
+ NOT_REACHED ();
+ break;
+ }
+
+ if (outbytes == 0)
+ return -1;
+
+ *op = '\0';
+ return op - op_;
+}
+
+/* Converts the string TEXT, which should be encoded in FROM-encoding, to a
+ dynamically allocated string in TO-encoding. Any characters which cannot be
+ converted will be represented by '?'.
+
+ LENGTH should be the length of the string or -1, if null terminated.
+
+ The returned string will be allocated on POOL.
+
+ This function's behaviour differs from that of g_convert_with_fallback
+ provided by GLib. The GLib function will fail (returns NULL) if any part of
+ the input string is not valid in the declared input encoding. This function
+ however perseveres even in the presence of badly encoded input. */
+char *
+recode_string_pool (const char *to, const char *from,
+ const char *text, int length, struct pool *pool)
+{
+ struct substring out;
if ( text == NULL )
return NULL;
if ( length == -1 )
- length = strlen(text);
+ length = strlen (text);
+ out = recode_substring_pool (to, from, ss_buffer (text, length), pool);
+ return out.string;
+}
- if (to == NULL)
- to = default_encoding;
+/* Returns the name of the encoding that should be used for file names.
- if (from == NULL)
- from = default_encoding;
+ This is meant to be the same encoding used by g_filename_from_uri() and
+ g_filename_to_uri() in GLib. */
+static const char *
+filename_encoding (void)
+{
+#if defined _WIN32 || defined __WIN32__
+ return "UTF-8";
+#else
+ return locale_charset ();
+#endif
+}
- for ( outbufferlength = 1 ; outbufferlength != 0; outbufferlength <<= 1 )
- if ( outbufferlength > length)
- break;
+static char *
+xconcat2 (const char *a, size_t a_len,
+ const char *b, size_t b_len)
+{
+ char *s = xmalloc (a_len + b_len + 1);
+ memcpy (s, a, a_len);
+ memcpy (s + a_len, b, b_len);
+ s[a_len + b_len] = '\0';
+ return s;
+}
- outbuf = xmalloc(outbufferlength);
- op = outbuf;
+/* Conceptually, this function concatenates HEAD_LEN-byte string HEAD and
+ TAIL_LEN-byte string TAIL, both encoded in UTF-8, then converts them to
+ ENCODING. If the re-encoded result is no more than MAX_LEN bytes long, then
+ it returns HEAD_LEN. Otherwise, it drops one character[*] from the end of
+ HEAD and tries again, repeating as necessary until the concatenated result
+ fits or until HEAD_LEN reaches 0.
- outbytes = outbufferlength;
- inbytes = length;
+ [*] Actually this function drops grapheme clusters instead of characters, so
+ that, e.g. a Unicode character followed by a combining accent character
+ is either completely included or completely excluded from HEAD_LEN. See
+ UAX #29 at http://unicode.org/reports/tr29/ for more information on
+ grapheme clusters.
+ A null ENCODING is treated as UTF-8.
- conv = create_iconv (to, from);
+ Sometimes this function has to actually construct the concatenated string to
+ measure its length. When this happens, it sets *RESULTP to that
+ null-terminated string, allocated with malloc(), for the caller to use if it
+ needs it. Otherwise, it sets *RESULTP to NULL.
- if ( (iconv_t) -1 == conv )
- return xstrdup (text);
+ Simple examples for encoding="UTF-8", max_len=6:
- do {
- const char *ip = text;
- result = iconv (conv, (ICONV_CONST char **) &text, &inbytes,
- &op, &outbytes);
+ head="abc", tail="xyz" => 3
+ head="abcd", tail="xyz" => 3 ("d" dropped).
+ head="abc", tail="uvwxyz" => 0 ("abc" dropped).
+ head="abc", tail="tuvwxyz" => 0 ("abc" dropped).
- if ( -1 == result )
- {
- int the_error = errno;
-
- switch (the_error)
- {
- case EILSEQ:
- case EINVAL:
- if ( outbytes > 0 )
- {
- *op++ = fallbackchar;
- outbytes--;
- text++;
- inbytes--;
- break;
- }
- /* Fall through */
- case E2BIG:
- free (outbuf);
- outbufferlength <<= 1;
- outbuf = xmalloc (outbufferlength);
- op = outbuf;
- outbytes = outbufferlength;
- inbytes = length;
- text = ip;
- break;
- default:
- /* should never happen */
- fprintf (stderr, "Character conversion error: %s\n", strerror (the_error));
- NOT_REACHED ();
- break;
- }
- }
- } while ( -1 == result );
+ Examples for encoding="ISO-8859-1", max_len=6:
- if (outbytes == 0 )
+ head="éèä", tail="xyz" => 6
+ (each letter in head is only 1 byte in ISO-8859-1 even though they
+ each take 2 bytes in UTF-8 encoding)
+*/
+static size_t
+utf8_encoding_concat__ (const char *head, size_t head_len,
+ const char *tail, size_t tail_len,
+ const char *encoding, size_t max_len,
+ char **resultp)
+{
+ *resultp = NULL;
+ if (head_len == 0)
+ return 0;
+ else if (encoding == NULL || !c_strcasecmp (encoding, "UTF-8"))
{
- char *const oldaddr = outbuf;
- outbuf = xrealloc (outbuf, outbufferlength + 1);
-
- op += (outbuf - oldaddr) ;
+ if (head_len + tail_len <= max_len)
+ return head_len;
+ else if (tail_len >= max_len)
+ return 0;
+ else
+ {
+ size_t copy_len;
+ size_t prev;
+ size_t ofs;
+ int mblen;
+
+ copy_len = 0;
+ for (ofs = u8_mbtouc (&prev, CHAR_CAST (const uint8_t *, head),
+ head_len);
+ ofs <= max_len - tail_len;
+ ofs += mblen)
+ {
+ ucs4_t next;
+
+ mblen = u8_mbtouc (&next,
+ CHAR_CAST (const uint8_t *, head + ofs),
+ head_len - ofs);
+ if (uc_is_grapheme_break (prev, next))
+ copy_len = ofs;
+
+ prev = next;
+ }
+
+ return copy_len;
+ }
}
+ else
+ {
+ char *result;
+
+ result = (tail_len > 0
+ ? xconcat2 (head, head_len, tail, tail_len)
+ : CONST_CAST (char *, head));
+ if (recode_string_len (encoding, "UTF-8", result,
+ head_len + tail_len) <= max_len)
+ {
+ *resultp = result != head ? result : NULL;
+ return head_len;
+ }
+ else
+ {
+ bool correct_result = false;
+ size_t copy_len;
+ size_t prev;
+ size_t ofs;
+ int mblen;
+
+ copy_len = 0;
+ for (ofs = u8_mbtouc (&prev, CHAR_CAST (const uint8_t *, head),
+ head_len);
+ ofs <= head_len;
+ ofs += mblen)
+ {
+ ucs4_t next;
+
+ mblen = u8_mbtouc (&next,
+ CHAR_CAST (const uint8_t *, head + ofs),
+ head_len - ofs);
+ if (uc_is_grapheme_break (prev, next))
+ {
+ if (result != head)
+ {
+ memcpy (result, head, ofs);
+ memcpy (result + ofs, tail, tail_len);
+ result[ofs + tail_len] = '\0';
+ }
+
+ if (recode_string_len (encoding, "UTF-8", result,
+ ofs + tail_len) <= max_len)
+ {
+ correct_result = true;
+ copy_len = ofs;
+ }
+ else
+ correct_result = false;
+ }
+
+ prev = next;
+ }
+
+ if (result != head)
+ {
+ if (correct_result)
+ *resultp = result;
+ else
+ free (result);
+ }
+
+ return copy_len;
+ }
+ }
+}
- *op = '\0';
+/* Concatenates a prefix of HEAD with all of TAIL and returns the result as a
+ null-terminated string owned by the caller. HEAD, TAIL, and the returned
+ string are all encoded in UTF-8. As many characters[*] from the beginning
+ of HEAD are included as will fit within MAX_LEN bytes supposing that the
+ resulting string were to be re-encoded in ENCODING. All of TAIL is always
+ included, even if TAIL by itself is longer than MAX_LEN in ENCODING.
+
+ [*] Actually this function drops grapheme clusters instead of characters, so
+ that, e.g. a Unicode character followed by a combining accent character
+ is either completely included or completely excluded from the returned
+ string. See UAX #29 at http://unicode.org/reports/tr29/ for more
+ information on grapheme clusters.
+
+ A null ENCODING is treated as UTF-8.
+
+ Simple examples for encoding="UTF-8", max_len=6:
+
+ head="abc", tail="xyz" => "abcxyz"
+ head="abcd", tail="xyz" => "abcxyz"
+ head="abc", tail="uvwxyz" => "uvwxyz"
+ head="abc", tail="tuvwxyz" => "tuvwxyz"
- return outbuf;
+ Examples for encoding="ISO-8859-1", max_len=6:
+
+ head="éèä", tail="xyz" => "éèäxyz"
+ (each letter in HEAD is only 1 byte in ISO-8859-1 even though they
+ each take 2 bytes in UTF-8 encoding)
+*/
+char *
+utf8_encoding_concat (const char *head, const char *tail,
+ const char *encoding, size_t max_len)
+{
+ size_t tail_len = strlen (tail);
+ size_t prefix_len;
+ char *result;
+
+ prefix_len = utf8_encoding_concat__ (head, strlen (head), tail, tail_len,
+ encoding, max_len, &result);
+ return (result != NULL
+ ? result
+ : xconcat2 (head, prefix_len, tail, tail_len));
+}
+
+/* Returns the length, in bytes, of the string that would be returned by
+ utf8_encoding_concat() if passed the same arguments, but the implementation
+ is often more efficient. */
+size_t
+utf8_encoding_concat_len (const char *head, const char *tail,
+ const char *encoding, size_t max_len)
+{
+ size_t tail_len = strlen (tail);
+ size_t prefix_len;
+ char *result;
+
+ prefix_len = utf8_encoding_concat__ (head, strlen (head), tail, tail_len,
+ encoding, max_len, &result);
+ free (result);
+ return prefix_len + tail_len;
}
+/* Returns an allocated, null-terminated string, owned by the caller,
+ containing as many characters[*] from the beginning of S that would fit
+ within MAX_LEN bytes if the returned string were to be re-encoded in
+ ENCODING. Both S and the returned string are encoded in UTF-8.
+
+ [*] Actually this function drops grapheme clusters instead of characters, so
+ that, e.g. a Unicode character followed by a combining accent character
+ is either completely included or completely excluded from the returned
+ string. See UAX #29 at http://unicode.org/reports/tr29/ for more
+ information on grapheme clusters.
+
+ A null ENCODING is treated as UTF-8.
+*/
+char *
+utf8_encoding_trunc (const char *s, const char *encoding, size_t max_len)
+{
+ return utf8_encoding_concat (s, "", encoding, max_len);
+}
+
+/* Returns the length, in bytes, of the string that would be returned by
+ utf8_encoding_trunc() if passed the same arguments, but the implementation
+ is often more efficient. */
+size_t
+utf8_encoding_trunc_len (const char *s, const char *encoding, size_t max_len)
+{
+ return utf8_encoding_concat_len (s, "", encoding, max_len);
+}
+
+/* Returns FILENAME converted from UTF-8 to the filename encoding.
+ On Windows the filename encoding is UTF-8; elsewhere it is based on the
+ current locale. */
+char *
+utf8_to_filename (const char *filename)
+{
+ return recode_string (filename_encoding (), "UTF-8", filename, -1);
+}
+
+/* Returns FILENAME converted from the filename encoding to UTF-8.
+ On Windows the filename encoding is UTF-8; elsewhere it is based on the
+ current locale. */
+char *
+filename_to_utf8 (const char *filename)
+{
+ return recode_string ("UTF-8", filename_encoding (), filename, -1);
+}
+
+/* Converts the string TEXT, which should be encoded in FROM-encoding, to a
+ dynamically allocated string in TO-encoding. Any characters which cannot be
+ converted will be represented by '?'.
+
+ The returned string will be null-terminated and allocated on POOL.
+
+ This function's behaviour differs from that of g_convert_with_fallback
+ provided by GLib. The GLib function will fail (returns NULL) if any part of
+ the input string is not valid in the declared input encoding. This function
+ however perseveres even in the presence of badly encoded input. */
+struct substring
+recode_substring_pool (const char *to, const char *from,
+ struct substring text, struct pool *pool)
+{
+ size_t outbufferlength;
+ iconv_t conv ;
+
+ if (to == NULL)
+ to = default_encoding;
+
+ if (from == NULL)
+ from = default_encoding;
+
+ conv = create_iconv (to, from);
+
+ if ( (iconv_t) -1 == conv )
+ {
+ struct substring out;
+ ss_alloc_substring_pool (&out, text, pool);
+ return out;
+ }
+
+ for ( outbufferlength = 1 ; outbufferlength != 0; outbufferlength <<= 1 )
+ if ( outbufferlength > text.length)
+ {
+ char *output = pool_malloc (pool, outbufferlength);
+ ssize_t output_len = try_recode (conv, text.string, text.length,
+ output, outbufferlength);
+ if (output_len >= 0)
+ return ss_buffer (output, output_len);
+ pool_free (pool, output);
+ }
+
+ NOT_REACHED ();
+}
void
i18n_init (void)
{
-#if ENABLE_NLS
setlocale (LC_CTYPE, "");
-#ifdef LC_MESSAGES
setlocale (LC_MESSAGES, "");
-#endif
#if HAVE_LC_PAPER
setlocale (LC_PAPER, "");
#endif
bindtextdomain (PACKAGE, relocate(locale_dir));
textdomain (PACKAGE);
-#endif /* ENABLE_NLS */
assert (default_encoding == NULL);
default_encoding = xstrdup (locale_charset ());
hmapx_init (&map);
}
-
const char *
get_default_encoding (void)
{
{
struct hmapx_node *node;
struct converter *cvtr;
+
HMAPX_FOR_EACH (cvtr, node, &map)
{
- iconv_close (cvtr->conv);
+ free (cvtr->tocode);
+ free (cvtr->fromcode);
+ if (cvtr->conv != (iconv_t) -1)
+ iconv_close (cvtr->conv);
free (cvtr);
}
bool
valid_encoding (const char *enc)
{
- iconv_t conv = iconv_open ("UTF8", enc);
+ iconv_t conv = iconv_open (UTF8, enc);
if ( conv == (iconv_t) -1)
return false;
return radix_char;
}
+const char *
+uc_name (ucs4_t uc, char buffer[16])
+{
+ if (uc >= 0x20 && uc < 0x7f)
+ snprintf (buffer, 16, "`%c'", uc);
+ else
+ snprintf (buffer, 16, "U+%04X", uc);
+ return buffer;
+}
+\f
+bool
+get_encoding_info (struct encoding_info *e, const char *name)
+{
+ const struct substring in = SS_LITERAL_INITIALIZER (
+ "\t\n\v\f\r "
+ "!\"#$%&'()*+,-./0123456789:;<=>?@"
+ "ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^_`"
+ "abcdefghijklmnopqrstuvwxyz{|}~");
+
+ struct substring out, cr, lf;
+ bool ok;
+
+ memset (e, 0, sizeof *e);
+
+ cr = recode_substring_pool (name, "UTF-8", ss_cstr ("\r"), NULL);
+ lf = recode_substring_pool (name, "UTF-8", ss_cstr ("\n"), NULL);
+ ok = cr.length >= 1 && cr.length <= MAX_UNIT && cr.length == lf.length;
+ if (!ok)
+ {
+ fprintf (stderr, "warning: encoding `%s' is not supported.\n", name);
+ ss_dealloc (&cr);
+ ss_dealloc (&lf);
+ ss_alloc_substring (&cr, ss_cstr ("\r"));
+ ss_alloc_substring (&lf, ss_cstr ("\n"));
+ }
+
+ e->unit = cr.length;
+ memcpy (e->cr, cr.string, e->unit);
+ memcpy (e->lf, lf.string, e->unit);
+
+ ss_dealloc (&cr);
+ ss_dealloc (&lf);
+
+ out = recode_substring_pool ("UTF-8", name, in, NULL);
+ e->is_ascii_compatible = ss_equals (in, out);
+ ss_dealloc (&out);
+
+ return ok;
+}
+
+bool
+is_encoding_ascii_compatible (const char *encoding)
+{
+ struct encoding_info e;
+
+ get_encoding_info (&e, encoding);
+ return e.is_ascii_compatible;
+}
projects / pspp-builds.git / blobdiff