* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 02111-1307, USA.
+ * License along with this library; if not, see <http://www.gnu.org/licenses/>.
*/
-#include <config.h>
+#include "config.h"
#include <stdlib.h>
#ifdef HAVE_CODESET
#endif
#include <string.h>
-#include "glib.h"
-
#ifdef G_PLATFORM_WIN32
#include <stdio.h>
#define STRICT
#undef STRICT
#endif
+#include "gconvert.h"
+#include "ghash.h"
+#include "gstrfuncs.h"
+#include "gtestutils.h"
+#include "gtypes.h"
+#include "gthread.h"
#include "glibintl.h"
#define UTF8_COMPUTE(Char, Mask, Len) \
(Result) <<= 6; \
(Result) |= ((Chars)[(Count)] & 0x3f); \
}
-
+
+/*
+ * Check whether a Unicode (5.2) char is in a valid range.
+ *
+ * The first check comes from the Unicode guarantee to never encode
+ * a point above 0x0010ffff, since UTF-16 couldn't represent it.
+ *
+ * The second check covers surrogate pairs (category Cs).
+ *
+ * @param Char the character
+ */
#define UNICODE_VALID(Char) \
((Char) < 0x110000 && \
- ((Char) < 0xD800 || (Char) >= 0xE000) && \
- (Char) != 0xFFFE && (Char) != 0xFFFF)
-
-
-gchar g_utf8_skip[256] = {
+ (((Char) & 0xFFFFF800) != 0xD800))
+
+
+static const gchar utf8_skip_data[256] = {
1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,
- 3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,4,4,4,4,4,4,4,4,5,5,5,5,6,6,0,0
+ 3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,4,4,4,4,4,4,4,4,5,5,5,5,6,6,1,1
};
+const gchar * const g_utf8_skip = utf8_skip_data;
+
/**
* g_utf8_find_prev_char:
- * @str: pointer to the beginning of a UTF-8 string
+ * @str: pointer to the beginning of a UTF-8 encoded string
* @p: pointer to some position within @str
*
* Given a position @p with a UTF-8 encoded string @str, find the start
* of the previous UTF-8 character starting before @p. Returns %NULL if no
- * UTF-8 characters are present in @p before @str.
+ * UTF-8 characters are present in @str before @p.
*
- * @p does not have to be at the beginning of a UTF-8 chracter. No check
+ * @p does not have to be at the beginning of a UTF-8 character. No check
* is made to see if the character found is actually valid other than
* it starts with an appropriate byte.
*
- * Return value: a pointer to the found character or %NULL.
- **/
+ * Returns: a pointer to the found character or %NULL.
+ */
gchar *
g_utf8_find_prev_char (const char *str,
const char *p)
/**
* g_utf8_find_next_char:
* @p: a pointer to a position within a UTF-8 encoded string
- * @end: a pointer to the end of the string, or %NULL to indicate
- * that the string is NULL terminated, in which case
- * the returned value will be
+ * @end: a pointer to the byte following the end of the string,
+ * or %NULL to indicate that the string is nul-terminated
*
- * Find the start of the next utf-8 character in the string after @p
+ * Finds the start of the next UTF-8 character in the string after @p.
*
- * @p does not have to be at the beginning of a UTF-8 chracter. No check
+ * @p does not have to be at the beginning of a UTF-8 character. No check
* is made to see if the character found is actually valid other than
* it starts with an appropriate byte.
*
- * Return value: a pointer to the found character or %NULL
- **/
+ * Returns: a pointer to the found character or %NULL
+ */
gchar *
g_utf8_find_next_char (const gchar *p,
const gchar *end)
* g_utf8_prev_char:
* @p: a pointer to a position within a UTF-8 encoded string
*
- * Find the previous UTF-8 character in the string before @p.
+ * Finds the previous UTF-8 character in the string before @p.
*
* @p does not have to be at the beginning of a UTF-8 character. No check
* is made to see if the character found is actually valid other than
* it starts with an appropriate byte. If @p might be the first
- * character of the string, you must use g_utf8_find_prev_char instead.
+ * character of the string, you must use g_utf8_find_prev_char() instead.
*
- * Return value: a pointer to the found character.
- **/
+ * Returns: a pointer to the found character
+ */
gchar *
g_utf8_prev_char (const gchar *p)
{
return (gchar *)p;
}
}
-
+
/**
* g_utf8_strlen:
- * @p: pointer to the start of a UTF-8 string.
+ * @p: pointer to the start of a UTF-8 encoded string
* @max: the maximum number of bytes to examine. If @max
* is less than 0, then the string is assumed to be
- * nul-terminated.
- *
- * Return value: the length of the string in characters
- **/
+ * nul-terminated. If @max is 0, @p will not be examined and
+ * may be %NULL. If @max is greater than 0, up to @max
+ * bytes are examined
+ *
+ * Computes the length of the string in characters, not including
+ * the terminating nul character. If the @max'th byte falls in the
+ * middle of a character, the last (partial) character is not counted.
+ *
+ * Returns: the length of the string in characters
+ */
glong
g_utf8_strlen (const gchar *p,
gssize max)
{
glong len = 0;
const gchar *start = p;
+ g_return_val_if_fail (p != NULL || max == 0, 0);
if (max < 0)
{
{
if (max == 0 || !*p)
return 0;
-
- p = g_utf8_next_char (p);
+
+ p = g_utf8_next_char (p);
while (p - start < max && *p)
{
++len;
- p = g_utf8_next_char (p);
+ p = g_utf8_next_char (p);
}
/* only do the last len increment if we got a complete
* char (don't count partial chars)
*/
- if (p - start == max)
+ if (p - start <= max)
++len;
}
}
/**
+ * g_utf8_substring:
+ * @str: a UTF-8 encoded string
+ * @start_pos: a character offset within @str
+ * @end_pos: another character offset within @str
+ *
+ * Copies a substring out of a UTF-8 encoded string.
+ * The substring will contain @end_pos - @start_pos characters.
+ *
+ * Returns: a newly allocated copy of the requested
+ * substring. Free with g_free() when no longer needed.
+ *
+ * Since: 2.30
+ */
+gchar *
+g_utf8_substring (const gchar *str,
+ glong start_pos,
+ glong end_pos)
+{
+ gchar *start, *end, *out;
+
+ start = g_utf8_offset_to_pointer (str, start_pos);
+ end = g_utf8_offset_to_pointer (start, end_pos - start_pos);
+
+ out = g_malloc (end - start + 1);
+ memcpy (out, start, end - start);
+ out[end - start] = 0;
+
+ return out;
+}
+
+/**
* g_utf8_get_char:
- * @p: a pointer to unicode character encoded as UTF-8
+ * @p: a pointer to Unicode character encoded as UTF-8
*
- * Convert a sequence of bytes encoded as UTF-8 to a unicode character.
- * If @p does not point to a valid UTF-8 encoded character, results are
- * undefined. If you are not sure that the bytes are complete
- * valid unicode characters, you should use g_utf8_get_char_validated()
+ * Converts a sequence of bytes encoded as UTF-8 to a Unicode character.
+ *
+ * If @p does not point to a valid UTF-8 encoded character, results
+ * are undefined. If you are not sure that the bytes are complete
+ * valid Unicode characters, you should use g_utf8_get_char_validated()
* instead.
*
- * Return value: the resulting character
- **/
+ * Returns: the resulting character
+ */
gunichar
g_utf8_get_char (const gchar *p)
{
/**
* g_utf8_offset_to_pointer:
* @str: a UTF-8 encoded string
- * @offset: a character offset within the string.
- *
+ * @offset: a character offset within @str
+ *
* Converts from an integer character offset to a pointer to a position
* within the string.
- *
- * Return value: the resulting pointer
- **/
+ *
+ * Since 2.10, this function allows to pass a negative @offset to
+ * step backwards. It is usually worth stepping backwards from the end
+ * instead of forwards if @offset is in the last fourth of the string,
+ * since moving forward is about 3 times faster than moving backward.
+ *
+ * Note that this function doesn't abort when reaching the end of @str.
+ * Therefore you should be sure that @offset is within string boundaries
+ * before calling that function. Call g_utf8_strlen() when unsure.
+ * This limitation exists as this function is called frequently during
+ * text rendering and therefore has to be as fast as possible.
+ *
+ * Returns: the resulting pointer
+ */
gchar *
g_utf8_offset_to_pointer (const gchar *str,
- glong offset)
+ glong offset)
{
const gchar *s = str;
- while (offset--)
- s = g_utf8_next_char (s);
-
+
+ if (offset > 0)
+ while (offset--)
+ s = g_utf8_next_char (s);
+ else
+ {
+ const char *s1;
+
+ /* This nice technique for fast backwards stepping
+ * through a UTF-8 string was dubbed "stutter stepping"
+ * by its inventor, Larry Ewing.
+ */
+ while (offset)
+ {
+ s1 = s;
+ s += offset;
+ while ((*s & 0xc0) == 0x80)
+ s--;
+
+ offset += g_utf8_pointer_to_offset (s, s1);
+ }
+ }
+
return (gchar *)s;
}
* @pos: a pointer to a position within @str
*
* Converts from a pointer to position within a string to a integer
- * character offset
+ * character offset.
+ *
+ * Since 2.10, this function allows @pos to be before @str, and returns
+ * a negative offset in this case.
*
- * Return value: the resulting character offset
- **/
+ * Returns: the resulting character offset
+ */
glong
g_utf8_pointer_to_offset (const gchar *str,
const gchar *pos)
{
const gchar *s = str;
glong offset = 0;
-
- while (s < pos)
- {
- s = g_utf8_next_char (s);
- offset++;
- }
+ if (pos < str)
+ offset = - g_utf8_pointer_to_offset (pos, str);
+ else
+ while (s < pos)
+ {
+ s = g_utf8_next_char (s);
+ offset++;
+ }
+
return offset;
}
/**
* g_utf8_strncpy:
* @dest: buffer to fill with characters from @src
- * @src: UTF-8 string
+ * @src: UTF-8 encoded string
* @n: character count
*
* Like the standard C strncpy() function, but copies a given number
* must be valid UTF-8 encoded text. (Use g_utf8_validate() on all
* text before trying to use UTF-8 utility functions with it.)
*
- * Return value: @dest
- **/
+ * Returns: @dest
+ */
gchar *
g_utf8_strncpy (gchar *dest,
const gchar *src,
return dest;
}
-static gboolean
-g_utf8_get_charset_internal (char **a)
-{
- char *charset = getenv("CHARSET");
-
- if (charset && a && ! *a)
- *a = charset;
-
- if (charset && strstr (charset, "UTF-8"))
- return TRUE;
-
-#ifdef HAVE_CODESET
- charset = nl_langinfo(CODESET);
- if (charset)
- {
- if (a && ! *a)
- *a = charset;
- if (strcmp (charset, "UTF-8") == 0)
- return TRUE;
- }
-#endif
-
-#if 0 /* #ifdef _NL_CTYPE_CODESET_NAME */
- charset = nl_langinfo (_NL_CTYPE_CODESET_NAME);
- if (charset)
- {
- if (a && ! *a)
- *a = charset;
- if (strcmp (charset, "UTF-8") == 0)
- return TRUE;
- }
-#endif
-
-#ifdef G_PLATFORM_WIN32
- if (a && ! *a)
- {
- static char codepage[10];
-
- sprintf (codepage, "CP%d", GetACP ());
- *a = codepage;
- /* What about codepage 1200? Is that UTF-8? */
- return FALSE;
- }
-#else
- if (a && ! *a)
- *a = "US-ASCII";
-#endif
-
- /* Assume this for compatibility at present. */
- return FALSE;
-}
-
-static int utf8_locale_cache = -1;
-static char *utf8_charset_cache = NULL;
-
-/**
- * g_get_charset:
- * @charset: return location for character set name
- *
- * Obtains the character set for the current locale; you might use
- * this character set as an argument to g_convert(), to convert from
- * the current locale's encoding to some other encoding. (Frequently
- * g_locale_to_utf8() and g_locale_from_utf8() are nice shortcuts,
- * though.)
- *
- * The return value is %TRUE if the locale's encoding is UTF-8, in that
- * case you can perhaps avoid calling g_convert().
- *
- * The string returned in @charset is not allocated, and should not be
- * freed.
- *
- * Return value: %TRUE if the returned charset is UTF-8
- **/
-gboolean
-g_get_charset (G_CONST_RETURN char **charset)
-{
- if (utf8_locale_cache != -1)
- {
- if (charset)
- *charset = utf8_charset_cache;
- return utf8_locale_cache;
- }
- utf8_locale_cache = g_utf8_get_charset_internal (&utf8_charset_cache);
- if (charset)
- *charset = utf8_charset_cache;
- return utf8_locale_cache;
-}
-
/* unicode_strchr */
/**
* g_unichar_to_utf8:
- * @c: a ISO10646 character code
+ * @c: a Unicode character code
* @outbuf: output buffer, must have at least 6 bytes of space.
* If %NULL, the length will be computed and returned
- * and nothing will be written to @out.
+ * and nothing will be written to @outbuf.
*
- * Convert a single character to utf8
+ * Converts a single character to UTF-8.
*
- * Return value: number of bytes written
- **/
+ * Returns: number of bytes written
+ */
int
g_unichar_to_utf8 (gunichar c,
gchar *outbuf)
{
+ /* If this gets modified, also update the copy in g_string_insert_unichar() */
guint len = 0;
int first;
int i;
/**
* g_utf8_strchr:
- * @p: a nul-terminated utf-8 string
- * @p_len: the maximum length of p
- * @c: a iso-10646 character
+ * @p: a nul-terminated UTF-8 encoded string
+ * @len: the maximum length of @p
+ * @c: a Unicode character
*
- * Find the leftmost occurence of the given iso-10646 character
- * in a UTF-8 string, while limiting the search to p_len bytes.
- * If len is -1, allow unbounded search.
+ * Finds the leftmost occurrence of the given Unicode character
+ * in a UTF-8 encoded string, while limiting the search to @len bytes.
+ * If @len is -1, allow unbounded search.
*
- * Return value: NULL if the string does not contain the character, otherwise, a
- * a pointer to the start of the leftmost of the character in the string.
- **/
+ * Returns: %NULL if the string does not contain the character,
+ * otherwise, a pointer to the start of the leftmost occurrence
+ * of the character in the string.
+ */
gchar *
g_utf8_strchr (const char *p,
- gssize p_len,
+ gssize len,
gunichar c)
{
gchar ch[10];
- gint len = g_unichar_to_utf8 (c, ch);
- ch[len] = '\0';
+ gint charlen = g_unichar_to_utf8 (c, ch);
+ ch[charlen] = '\0';
- return g_strstr_len (p, p_len, ch);
+ return g_strstr_len (p, len, ch);
}
/**
* g_utf8_strrchr:
- * @p: a nul-terminated utf-8 string
- * @p_len: the maximum length of p
- * @c: a iso-10646 character/
+ * @p: a nul-terminated UTF-8 encoded string
+ * @len: the maximum length of @p
+ * @c: a Unicode character
*
- * Find the rightmost occurence of the given iso-10646 character
- * in a UTF-8 string, while limiting the search to p_len bytes.
- * If len is -1, allow unbounded search.
+ * Find the rightmost occurrence of the given Unicode character
+ * in a UTF-8 encoded string, while limiting the search to @len bytes.
+ * If @len is -1, allow unbounded search.
*
- * Return value: NULL if the string does not contain the character, otherwise, a
- * a pointer to the start of the rightmost of the character in the string.
- **/
+ * Returns: %NULL if the string does not contain the character,
+ * otherwise, a pointer to the start of the rightmost occurrence
+ * of the character in the string.
+ */
gchar *
g_utf8_strrchr (const char *p,
- gssize p_len,
+ gssize len,
gunichar c)
{
gchar ch[10];
- gint len = g_unichar_to_utf8 (c, ch);
- ch[len] = '\0';
+ gint charlen = g_unichar_to_utf8 (c, ch);
+ ch[charlen] = '\0';
- return g_strrstr_len (p, p_len, ch);
+ return g_strrstr_len (p, len, ch);
}
/* Like g_utf8_get_char, but take a maximum length
- * and return (gunichar)-2 on incomplete trailing character
+ * and return (gunichar)-2 on incomplete trailing character;
+ * also check for malformed or overlong sequences
+ * and return (gunichar)-1 in this case.
*/
static inline gunichar
g_utf8_get_char_extended (const gchar *p,
- gssize max_len)
+ gssize max_len)
{
guint i, len;
+ gunichar min_code;
gunichar wc = (guchar) *p;
if (wc < 0x80)
{
return wc;
}
- else if (wc < 0xc0)
+ else if (G_UNLIKELY (wc < 0xc0))
{
return (gunichar)-1;
}
{
len = 2;
wc &= 0x1f;
+ min_code = 1 << 7;
}
else if (wc < 0xf0)
{
len = 3;
wc &= 0x0f;
+ min_code = 1 << 11;
}
else if (wc < 0xf8)
{
len = 4;
wc &= 0x07;
+ min_code = 1 << 16;
}
else if (wc < 0xfc)
{
len = 5;
wc &= 0x03;
+ min_code = 1 << 21;
}
else if (wc < 0xfe)
{
len = 6;
wc &= 0x01;
+ min_code = 1 << 26;
}
else
{
return (gunichar)-1;
}
-
- if (max_len >= 0 && len > max_len)
+
+ if (G_UNLIKELY (max_len >= 0 && len > max_len))
{
for (i = 1; i < max_len; i++)
{
for (i = 1; i < len; ++i)
{
gunichar ch = ((guchar *)p)[i];
-
- if ((ch & 0xc0) != 0x80)
+
+ if (G_UNLIKELY ((ch & 0xc0) != 0x80))
{
if (ch)
return (gunichar)-1;
wc |= (ch & 0x3f);
}
- if (UTF8_LENGTH(wc) != len)
+ if (G_UNLIKELY (wc < min_code))
return (gunichar)-1;
-
+
return wc;
}
/**
* g_utf8_get_char_validated:
- * @p: a pointer to unicode character encoded as UTF-8
- * @max_len: the maximum number of bytes to read, or -1, for no maximum.
+ * @p: a pointer to Unicode character encoded as UTF-8
+ * @max_len: the maximum number of bytes to read, or -1, for no maximum or
+ * if @p is nul-terminated
*
- * Convert a sequence of bytes encoded as UTF-8 to a unicode character.
+ * Convert a sequence of bytes encoded as UTF-8 to a Unicode character.
* This function checks for incomplete characters, for invalid characters
* such as characters that are out of the range of Unicode, and for
* overlong encodings of valid characters.
*
- * Return value: the resulting character. If @p points to a partial
- * sequence at the end of a string that could begin a valid character,
- * returns (gunichar)-2; otherwise, if @p does not point to a valid
- * UTF-8 encoded unicode character, returns (gunichar)-1.
- **/
+ * Returns: the resulting character. If @p points to a partial
+ * sequence at the end of a string that could begin a valid
+ * character (or if @max_len is zero), returns (gunichar)-2;
+ * otherwise, if @p does not point to a valid UTF-8 encoded
+ * Unicode character, returns (gunichar)-1.
+ */
gunichar
-g_utf8_get_char_validated (const gchar *p,
- gssize max_len)
+g_utf8_get_char_validated (const gchar *p,
+ gssize max_len)
{
- gunichar result = g_utf8_get_char_extended (p, max_len);
+ gunichar result;
+
+ if (max_len == 0)
+ return (gunichar)-2;
+
+ result = g_utf8_get_char_extended (p, max_len);
if (result & 0x80000000)
return result;
/**
* g_utf8_to_ucs4_fast:
* @str: a UTF-8 encoded string
- * @len: the maximum length of @str to use. If < 0, then
- * the string is %NULL terminated.
- * @items_written: location to store the number of characters in the
- * result, or %NULL.
+ * @len: the maximum length of @str to use, in bytes. If @len < 0,
+ * then the string is nul-terminated.
+ * @items_written: (allow-none): location to store the number of
+ * characters in the result, or %NULL.
*
* Convert a string from UTF-8 to a 32-bit fixed width
* representation as UCS-4, assuming valid UTF-8 input.
* This function is roughly twice as fast as g_utf8_to_ucs4()
- * but does no error checking on the input.
+ * but does no error checking on the input. A trailing 0 character
+ * will be added to the string after the converted text.
*
- * Return value: a pointer to a newly allocated UCS-4 string.
- * This value must be freed with g_free()
- **/
+ * Returns: a pointer to a newly allocated UCS-4 string.
+ * This value must be freed with g_free().
+ */
gunichar *
g_utf8_to_ucs4_fast (const gchar *str,
glong len,
glong *items_written)
{
- gint j, charlen;
gunichar *result;
gint n_chars, i;
const gchar *p;
p = str;
for (i=0; i < n_chars; i++)
{
- gunichar wc = ((unsigned char *)p)[0];
+ gunichar wc = (guchar)*p++;
if (wc < 0x80)
{
result[i] = wc;
- p++;
}
else
{
- if (wc < 0xe0)
- {
- charlen = 2;
- wc &= 0x1f;
- }
- else if (wc < 0xf0)
- {
- charlen = 3;
- wc &= 0x0f;
- }
- else if (wc < 0xf8)
- {
- charlen = 4;
- wc &= 0x07;
- }
- else if (wc < 0xfc)
- {
- charlen = 5;
- wc &= 0x03;
- }
- else
+ gunichar mask = 0x40;
+
+ if (G_UNLIKELY ((wc & mask) == 0))
{
- charlen = 6;
- wc &= 0x01;
+ /* It's an out-of-sequence 10xxxxxxx byte.
+ * Rather than making an ugly hash of this and the next byte
+ * and overrunning the buffer, it's more useful to treat it
+ * with a replacement character
+ */
+ result[i] = 0xfffd;
+ continue;
}
- for (j = 1; j < charlen; j++)
+ do
{
wc <<= 6;
- wc |= ((unsigned char *)p)[j] & 0x3f;
+ wc |= (guchar)(*p++) & 0x3f;
+ mask <<= 5;
}
+ while((wc & mask) != 0);
+
+ wc &= mask - 1;
result[i] = wc;
- p += charlen;
}
}
result[i] = 0;
return result;
}
+static gpointer
+try_malloc_n (gsize n_blocks, gsize n_block_bytes, GError **error)
+{
+ gpointer ptr = g_try_malloc_n (n_blocks, n_block_bytes);
+ if (ptr == NULL)
+ g_set_error_literal (error, G_CONVERT_ERROR, G_CONVERT_ERROR_NO_MEMORY,
+ _("Failed to allocate memory"));
+ return ptr;
+}
+
/**
* g_utf8_to_ucs4:
* @str: a UTF-8 encoded string
- * @len: the maximum length of @str to use. If < 0, then
- * the string is %NULL terminated.
- * @items_read: location to store number of bytes read, or %NULL.
- * If %NULL, then %G_CONVERT_ERROR_PARTIAL_INPUT will be
- * returned in case @str contains a trailing partial
- * character. If an error occurs then the index of the
- * invalid input is stored here.
- * @items_written: location to store number of characters written or %NULL.
- * The value here stored does not include the trailing 0
- * character.
- * @error: location to store the error occuring, or %NULL to ignore
- * errors. Any of the errors in #GConvertError other than
- * %G_CONVERT_ERROR_NO_CONVERSION may occur.
+ * @len: the maximum length of @str to use, in bytes. If @len < 0,
+ * then the string is nul-terminated.
+ * @items_read: (allow-none): location to store number of bytes read, or %NULL.
+ * If %NULL, then %G_CONVERT_ERROR_PARTIAL_INPUT will be
+ * returned in case @str contains a trailing partial
+ * character. If an error occurs then the index of the
+ * invalid input is stored here.
+ * @items_written: (allow-none): location to store number of characters
+ * written or %NULL. The value here stored does not include the
+ * trailing 0 character.
+ * @error: location to store the error occurring, or %NULL to ignore
+ * errors. Any of the errors in #GConvertError other than
+ * %G_CONVERT_ERROR_NO_CONVERSION may occur.
*
* Convert a string from UTF-8 to a 32-bit fixed width
- * representation as UCS-4. A trailing 0 will be added to the
+ * representation as UCS-4. A trailing 0 character will be added to the
* string after the converted text.
*
- * Return value: a pointer to a newly allocated UCS-4 string.
- * This value must be freed with g_free(). If an
- * error occurs, %NULL will be returned and
- * @error set.
- **/
+ * Returns: a pointer to a newly allocated UCS-4 string.
+ * This value must be freed with g_free(). If an error occurs,
+ * %NULL will be returned and @error set.
+ */
gunichar *
g_utf8_to_ucs4 (const gchar *str,
glong len,
n_chars = 0;
while ((len < 0 || str + len - in > 0) && *in)
{
- gunichar wc = g_utf8_get_char_extended (in, str + len - in);
+ gunichar wc = g_utf8_get_char_extended (in, len < 0 ? 6 : str + len - in);
if (wc & 0x80000000)
{
if (wc == (gunichar)-2)
if (items_read)
break;
else
- g_set_error (error, G_CONVERT_ERROR, G_CONVERT_ERROR_PARTIAL_INPUT,
- _("Partial character sequence at end of input"));
+ g_set_error_literal (error, G_CONVERT_ERROR, G_CONVERT_ERROR_PARTIAL_INPUT,
+ _("Partial character sequence at end of input"));
}
else
- g_set_error (error, G_CONVERT_ERROR, G_CONVERT_ERROR_ILLEGAL_SEQUENCE,
- _("Invalid byte sequence in conversion input"));
+ g_set_error_literal (error, G_CONVERT_ERROR, G_CONVERT_ERROR_ILLEGAL_SEQUENCE,
+ _("Invalid byte sequence in conversion input"));
goto err_out;
}
in = g_utf8_next_char (in);
}
- result = g_new (gunichar, n_chars + 1);
-
+ result = try_malloc_n (n_chars + 1, sizeof (gunichar), error);
+ if (result == NULL)
+ goto err_out;
+
in = str;
for (i=0; i < n_chars; i++)
{
/**
* g_ucs4_to_utf8:
* @str: a UCS-4 encoded string
- * @len: the maximum length of @str to use. If < 0, then
- * the string is %NULL terminated.
- * @items_read: location to store number of characters read read, or %NULL.
- * @items_written: location to store number of bytes written or %NULL.
- * The value here stored does not include the trailing 0
- * byte.
- * @error: location to store the error occuring, or %NULL to ignore
+ * @len: the maximum length (number of characters) of @str to use.
+ * If @len < 0, then the string is nul-terminated.
+ * @items_read: (allow-none): location to store number of characters
+ * read, or %NULL.
+ * @items_written: (allow-none): location to store number of bytes
+ * written or %NULL. The value here stored does not include the
+ * trailing 0 byte.
+ * @error: location to store the error occurring, or %NULL to ignore
* errors. Any of the errors in #GConvertError other than
* %G_CONVERT_ERROR_NO_CONVERSION may occur.
*
* Convert a string from a 32-bit fixed width representation as UCS-4.
* to UTF-8. The result will be terminated with a 0 byte.
*
- * Return value: a pointer to a newly allocated UTF-8 string.
- * This value must be freed with g_free(). If an
- * error occurs, %NULL will be returned and
- * @error set.
- **/
+ * Returns: a pointer to a newly allocated UTF-8 string.
+ * This value must be freed with g_free(). If an error occurs,
+ * %NULL will be returned and @error set. In that case, @items_read
+ * will be set to the position of the first invalid input character.
+ */
gchar *
g_ucs4_to_utf8 (const gunichar *str,
glong len,
if (str[i] >= 0x80000000)
{
- if (items_read)
- *items_read = i;
-
- g_set_error (error, G_CONVERT_ERROR, G_CONVERT_ERROR_ILLEGAL_SEQUENCE,
- _("Character out of range for UTF-8"));
+ g_set_error_literal (error, G_CONVERT_ERROR, G_CONVERT_ERROR_ILLEGAL_SEQUENCE,
+ _("Character out of range for UTF-8"));
goto err_out;
}
result_length += UTF8_LENGTH (str[i]);
}
- result = g_malloc (result_length + 1);
+ result = try_malloc_n (result_length + 1, 1, error);
+ if (result == NULL)
+ goto err_out;
+
p = result;
i = 0;
/**
* g_utf16_to_utf8:
* @str: a UTF-16 encoded string
- * @len: the maximum length of @str to use. If < 0, then
- * the string is terminated with a 0 character.
- * @items_read: location to store number of words read, or %NULL.
- * If %NULL, then %G_CONVERT_ERROR_PARTIAL_INPUT will be
- * returned in case @str contains a trailing partial
- * character. If an error occurs then the index of the
- * invalid input is stored here.
- * @items_written: location to store number of bytes written, or %NULL.
- * The value stored here does not include the trailing
- * 0 byte.
- * @error: location to store the error occuring, or %NULL to ignore
- * errors. Any of the errors in #GConvertError other than
- * %G_CONVERT_ERROR_NO_CONVERSION may occur.
+ * @len: the maximum length (number of #gunichar2) of @str to use.
+ * If @len < 0, then the string is nul-terminated.
+ * @items_read: (allow-none): location to store number of words read,
+ * or %NULL. If %NULL, then %G_CONVERT_ERROR_PARTIAL_INPUT will be
+ * returned in case @str contains a trailing partial character. If
+ * an error occurs then the index of the invalid input is stored here.
+ * @items_written: (allow-none): location to store number of bytes written,
+ * or %NULL. The value stored here does not include the trailing 0 byte.
+ * @error: location to store the error occurring, or %NULL to ignore
+ * errors. Any of the errors in #GConvertError other than
+ * %G_CONVERT_ERROR_NO_CONVERSION may occur.
*
* Convert a string from UTF-16 to UTF-8. The result will be
* terminated with a 0 byte.
- *
- * Return value: a pointer to a newly allocated UTF-8 string.
- * This value must be freed with g_free(). If an
- * error occurs, %NULL will be returned and
- * @error set.
+ *
+ * Note that the input is expected to be already in native endianness,
+ * an initial byte-order-mark character is not handled specially.
+ * g_convert() can be used to convert a byte buffer of UTF-16 data of
+ * ambiguous endianess.
+ *
+ * Further note that this function does not validate the result
+ * string; it may e.g. include embedded NUL characters. The only
+ * validation done by this function is to ensure that the input can
+ * be correctly interpreted as UTF-16, i.e. it doesn't contain
+ * things unpaired surrogates.
+ *
+ * Returns: a pointer to a newly allocated UTF-8 string.
+ * This value must be freed with g_free(). If an error occurs,
+ * %NULL will be returned and @error set.
**/
gchar *
g_utf16_to_utf8 (const gunichar2 *str,
- glong len,
- glong *items_read,
- glong *items_written,
+ glong len,
+ glong *items_read,
+ glong *items_written,
GError **error)
{
- /* This function and g_utf16_to_ucs4 are almost exactly identical - The lines that differ
- * are marked.
+ /* This function and g_utf16_to_ucs4 are almost exactly identical -
+ * The lines that differ are marked.
*/
const gunichar2 *in;
gchar *out;
gint n_bytes;
gunichar high_surrogate;
- g_return_val_if_fail (str != 0, NULL);
+ g_return_val_if_fail (str != NULL, NULL);
n_bytes = 0;
in = str;
}
else
{
- g_set_error (error, G_CONVERT_ERROR, G_CONVERT_ERROR_ILLEGAL_SEQUENCE,
- _("Invalid sequence in conversion input"));
+ g_set_error_literal (error, G_CONVERT_ERROR, G_CONVERT_ERROR_ILLEGAL_SEQUENCE,
+ _("Invalid sequence in conversion input"));
goto err_out;
}
}
{
if (high_surrogate)
{
- g_set_error (error, G_CONVERT_ERROR, G_CONVERT_ERROR_ILLEGAL_SEQUENCE,
- _("Invalid sequence in conversion input"));
+ g_set_error_literal (error, G_CONVERT_ERROR, G_CONVERT_ERROR_ILLEGAL_SEQUENCE,
+ _("Invalid sequence in conversion input"));
goto err_out;
}
if (high_surrogate && !items_read)
{
- g_set_error (error, G_CONVERT_ERROR, G_CONVERT_ERROR_PARTIAL_INPUT,
- _("Partial character sequence at end of input"));
+ g_set_error_literal (error, G_CONVERT_ERROR, G_CONVERT_ERROR_PARTIAL_INPUT,
+ _("Partial character sequence at end of input"));
goto err_out;
}
/* At this point, everything is valid, and we just need to convert
*/
/********** DIFFERENT for UTF8/UCS4 **********/
- result = g_malloc (n_bytes + 1);
-
+ result = try_malloc_n (n_bytes + 1, 1, error);
+ if (result == NULL)
+ goto err_out;
+
high_surrogate = 0;
out = result;
in = str;
/**
* g_utf16_to_ucs4:
* @str: a UTF-16 encoded string
- * @len: the maximum length of @str to use. If < 0, then
- * the string is terminated with a 0 character.
- * @items_read: location to store number of words read, or %NULL.
- * If %NULL, then %G_CONVERT_ERROR_PARTIAL_INPUT will be
- * returned in case @str contains a trailing partial
- * character. If an error occurs then the index of the
- * invalid input is stored here.
- * @items_written: location to store number of characters written, or %NULL.
- * The value stored here does not include the trailing
- * 0 character.
- * @error: location to store the error occuring, or %NULL to ignore
- * errors. Any of the errors in #GConvertError other than
- * %G_CONVERT_ERROR_NO_CONVERSION may occur.
+ * @len: the maximum length (number of #gunichar2) of @str to use.
+ * If @len < 0, then the string is nul-terminated.
+ * @items_read: (allow-none): location to store number of words read,
+ * or %NULL. If %NULL, then %G_CONVERT_ERROR_PARTIAL_INPUT will be
+ * returned in case @str contains a trailing partial character. If
+ * an error occurs then the index of the invalid input is stored here.
+ * @items_written: (allow-none): location to store number of characters
+ * written, or %NULL. The value stored here does not include the trailing
+ * 0 character.
+ * @error: location to store the error occurring, or %NULL to ignore
+ * errors. Any of the errors in #GConvertError other than
+ * %G_CONVERT_ERROR_NO_CONVERSION may occur.
*
* Convert a string from UTF-16 to UCS-4. The result will be
- * terminated with a 0 character.
+ * nul-terminated.
*
- * Return value: a pointer to a newly allocated UCS-4 string.
- * This value must be freed with g_free(). If an
- * error occurs, %NULL will be returned and
- * @error set.
- **/
+ * Returns: a pointer to a newly allocated UCS-4 string.
+ * This value must be freed with g_free(). If an error occurs,
+ * %NULL will be returned and @error set.
+ */
gunichar *
g_utf16_to_ucs4 (const gunichar2 *str,
glong len,
gint n_bytes;
gunichar high_surrogate;
- g_return_val_if_fail (str != 0, NULL);
+ g_return_val_if_fail (str != NULL, NULL);
n_bytes = 0;
in = str;
while ((len < 0 || in - str < len) && *in)
{
gunichar2 c = *in;
- gunichar wc;
if (c >= 0xdc00 && c < 0xe000) /* low surrogate */
{
if (high_surrogate)
{
- wc = SURROGATE_VALUE (high_surrogate, c);
high_surrogate = 0;
}
else
{
- g_set_error (error, G_CONVERT_ERROR, G_CONVERT_ERROR_ILLEGAL_SEQUENCE,
- _("Invalid sequence in conversion input"));
+ g_set_error_literal (error, G_CONVERT_ERROR, G_CONVERT_ERROR_ILLEGAL_SEQUENCE,
+ _("Invalid sequence in conversion input"));
goto err_out;
}
}
{
if (high_surrogate)
{
- g_set_error (error, G_CONVERT_ERROR, G_CONVERT_ERROR_ILLEGAL_SEQUENCE,
- _("Invalid sequence in conversion input"));
+ g_set_error_literal (error, G_CONVERT_ERROR, G_CONVERT_ERROR_ILLEGAL_SEQUENCE,
+ _("Invalid sequence in conversion input"));
goto err_out;
}
high_surrogate = c;
goto next1;
}
- else
- wc = c;
}
/********** DIFFERENT for UTF8/UCS4 **********/
if (high_surrogate && !items_read)
{
- g_set_error (error, G_CONVERT_ERROR, G_CONVERT_ERROR_PARTIAL_INPUT,
- _("Partial character sequence at end of input"));
+ g_set_error_literal (error, G_CONVERT_ERROR, G_CONVERT_ERROR_PARTIAL_INPUT,
+ _("Partial character sequence at end of input"));
goto err_out;
}
/* At this point, everything is valid, and we just need to convert
*/
/********** DIFFERENT for UTF8/UCS4 **********/
- result = g_malloc (n_bytes + 4);
-
+ result = try_malloc_n (n_bytes + 4, 1, error);
+ if (result == NULL)
+ goto err_out;
+
high_surrogate = 0;
out = result;
in = str;
/**
* g_utf8_to_utf16:
* @str: a UTF-8 encoded string
- * @len: the maximum length of @str to use. If < 0, then
- * the string is %NULL terminated.
-
- * @items_read: location to store number of bytes read, or %NULL.
- * If %NULL, then %G_CONVERT_ERROR_PARTIAL_INPUT will be
- * returned in case @str contains a trailing partial
- * character. If an error occurs then the index of the
- * invalid input is stored here.
- * @items_written: location to store number of words written, or %NULL.
- * The value stored here does not include the trailing
- * 0 word.
- * @error: location to store the error occuring, or %NULL to ignore
- * errors. Any of the errors in #GConvertError other than
- * %G_CONVERT_ERROR_NO_CONVERSION may occur.
+ * @len: the maximum length (number of bytes) of @str to use.
+ * If @len < 0, then the string is nul-terminated.
+ * @items_read: (allow-none): location to store number of bytes read,
+ * or %NULL. If %NULL, then %G_CONVERT_ERROR_PARTIAL_INPUT will be
+ * returned in case @str contains a trailing partial character. If
+ * an error occurs then the index of the invalid input is stored here.
+ * @items_written: (allow-none): location to store number of #gunichar2
+ * written, or %NULL. The value stored here does not include the
+ * trailing 0.
+ * @error: location to store the error occurring, or %NULL to ignore
+ * errors. Any of the errors in #GConvertError other than
+ * %G_CONVERT_ERROR_NO_CONVERSION may occur.
*
- * Convert a string from UTF-8 to UTF-16. A 0 word will be
+ * Convert a string from UTF-8 to UTF-16. A 0 character will be
* added to the result after the converted text.
- *
- * Return value: a pointer to a newly allocated UTF-16 string.
- * This value must be freed with g_free(). If an
- * error occurs, %NULL will be returned and
- * @error set.
- **/
+ *
+ * Returns: a pointer to a newly allocated UTF-16 string.
+ * This value must be freed with g_free(). If an error occurs,
+ * %NULL will be returned and @error set.
+ */
gunichar2 *
g_utf8_to_utf16 (const gchar *str,
- glong len,
- glong *items_read,
- glong *items_written,
+ glong len,
+ glong *items_read,
+ glong *items_written,
GError **error)
{
gunichar2 *result = NULL;
n16 = 0;
while ((len < 0 || str + len - in > 0) && *in)
{
- gunichar wc = g_utf8_get_char_extended (in, str + len - in);
+ gunichar wc = g_utf8_get_char_extended (in, len < 0 ? 6 : str + len - in);
if (wc & 0x80000000)
{
if (wc == (gunichar)-2)
if (items_read)
break;
else
- g_set_error (error, G_CONVERT_ERROR, G_CONVERT_ERROR_PARTIAL_INPUT,
- _("Partial character sequence at end of input"));
+ g_set_error_literal (error, G_CONVERT_ERROR, G_CONVERT_ERROR_PARTIAL_INPUT,
+ _("Partial character sequence at end of input"));
}
else
- g_set_error (error, G_CONVERT_ERROR, G_CONVERT_ERROR_ILLEGAL_SEQUENCE,
- _("Invalid byte sequence in conversion input"));
+ g_set_error_literal (error, G_CONVERT_ERROR, G_CONVERT_ERROR_ILLEGAL_SEQUENCE,
+ _("Invalid byte sequence in conversion input"));
goto err_out;
}
n16 += 1;
else if (wc < 0xe000)
{
- g_set_error (error, G_CONVERT_ERROR, G_CONVERT_ERROR_ILLEGAL_SEQUENCE,
- _("Invalid sequence in conversion input"));
+ g_set_error_literal (error, G_CONVERT_ERROR, G_CONVERT_ERROR_ILLEGAL_SEQUENCE,
+ _("Invalid sequence in conversion input"));
goto err_out;
}
n16 += 2;
else
{
- g_set_error (error, G_CONVERT_ERROR, G_CONVERT_ERROR_ILLEGAL_SEQUENCE,
- _("Character out of range for UTF-16"));
+ g_set_error_literal (error, G_CONVERT_ERROR, G_CONVERT_ERROR_ILLEGAL_SEQUENCE,
+ _("Character out of range for UTF-16"));
goto err_out;
}
in = g_utf8_next_char (in);
}
- result = g_new (gunichar2, n16 + 1);
-
+ result = try_malloc_n (n16 + 1, sizeof (gunichar2), error);
+ if (result == NULL)
+ goto err_out;
+
in = str;
for (i = 0; i < n16;)
{
/**
* g_ucs4_to_utf16:
* @str: a UCS-4 encoded string
- * @len: the maximum length of @str to use. If < 0, then
- * the string is terminated with a zero character.
- * @items_read: location to store number of bytes read, or %NULL.
- * If an error occurs then the index of the invalid input
- * is stored here.
- * @items_written: location to store number of words written, or %NULL.
- * The value stored here does not include the trailing
- * 0 word.
- * @error: location to store the error occuring, or %NULL to ignore
- * errors. Any of the errors in #GConvertError other than
- * %G_CONVERT_ERROR_NO_CONVERSION may occur.
+ * @len: the maximum length (number of characters) of @str to use.
+ * If @len < 0, then the string is nul-terminated.
+ * @items_read: (allow-none): location to store number of bytes read,
+ * or %NULL. If an error occurs then the index of the invalid input
+ * is stored here.
+ * @items_written: (allow-none): location to store number of #gunichar2
+ * written, or %NULL. The value stored here does not include the
+ * trailing 0.
+ * @error: location to store the error occurring, or %NULL to ignore
+ * errors. Any of the errors in #GConvertError other than
+ * %G_CONVERT_ERROR_NO_CONVERSION may occur.
*
- * Convert a string from UCS-4 to UTF-16. A 0 word will be
+ * Convert a string from UCS-4 to UTF-16. A 0 character will be
* added to the result after the converted text.
*
- * Return value: a pointer to a newly allocated UTF-16 string.
- * This value must be freed with g_free(). If an
- * error occurs, %NULL will be returned and
- * @error set.
- **/
+ * Returns: a pointer to a newly allocated UTF-16 string.
+ * This value must be freed with g_free(). If an error occurs,
+ * %NULL will be returned and @error set.
+ */
gunichar2 *
g_ucs4_to_utf16 (const gunichar *str,
glong len,
n16 += 1;
else if (wc < 0xe000)
{
- g_set_error (error, G_CONVERT_ERROR, G_CONVERT_ERROR_ILLEGAL_SEQUENCE,
- _("Invalid sequence in conversion input"));
+ g_set_error_literal (error, G_CONVERT_ERROR, G_CONVERT_ERROR_ILLEGAL_SEQUENCE,
+ _("Invalid sequence in conversion input"));
goto err_out;
}
n16 += 2;
else
{
- g_set_error (error, G_CONVERT_ERROR, G_CONVERT_ERROR_ILLEGAL_SEQUENCE,
- _("Character out of range for UTF-16"));
+ g_set_error_literal (error, G_CONVERT_ERROR, G_CONVERT_ERROR_ILLEGAL_SEQUENCE,
+ _("Character out of range for UTF-16"));
goto err_out;
}
i++;
}
-
- result = g_new (gunichar2, n16 + 1);
-
+
+ result = try_malloc_n (n16 + 1, sizeof (gunichar2), error);
+ if (result == NULL)
+ goto err_out;
+
for (i = 0, j = 0; j < n16; i++)
{
gunichar wc = str[i];
return result;
}
+#define CONTINUATION_CHAR \
+ G_STMT_START { \
+ if ((*(guchar *)p & 0xc0) != 0x80) /* 10xxxxxx */ \
+ goto error; \
+ val <<= 6; \
+ val |= (*(guchar *)p) & 0x3f; \
+ } G_STMT_END
+
+static const gchar *
+fast_validate (const char *str)
+
+{
+ gunichar val = 0;
+ gunichar min = 0;
+ const gchar *p;
+
+ for (p = str; *p; p++)
+ {
+ if (*(guchar *)p < 128)
+ /* done */;
+ else
+ {
+ const gchar *last;
+
+ last = p;
+ if ((*(guchar *)p & 0xe0) == 0xc0) /* 110xxxxx */
+ {
+ if (G_UNLIKELY ((*(guchar *)p & 0x1e) == 0))
+ goto error;
+ p++;
+ if (G_UNLIKELY ((*(guchar *)p & 0xc0) != 0x80)) /* 10xxxxxx */
+ goto error;
+ }
+ else
+ {
+ if ((*(guchar *)p & 0xf0) == 0xe0) /* 1110xxxx */
+ {
+ min = (1 << 11);
+ val = *(guchar *)p & 0x0f;
+ goto TWO_REMAINING;
+ }
+ else if ((*(guchar *)p & 0xf8) == 0xf0) /* 11110xxx */
+ {
+ min = (1 << 16);
+ val = *(guchar *)p & 0x07;
+ }
+ else
+ goto error;
+
+ p++;
+ CONTINUATION_CHAR;
+ TWO_REMAINING:
+ p++;
+ CONTINUATION_CHAR;
+ p++;
+ CONTINUATION_CHAR;
+
+ if (G_UNLIKELY (val < min))
+ goto error;
+
+ if (G_UNLIKELY (!UNICODE_VALID(val)))
+ goto error;
+ }
+
+ continue;
+
+ error:
+ return last;
+ }
+ }
+
+ return p;
+}
+
+static const gchar *
+fast_validate_len (const char *str,
+ gssize max_len)
+
+{
+ gunichar val = 0;
+ gunichar min = 0;
+ const gchar *p;
+
+ g_assert (max_len >= 0);
+
+ for (p = str; ((p - str) < max_len) && *p; p++)
+ {
+ if (*(guchar *)p < 128)
+ /* done */;
+ else
+ {
+ const gchar *last;
+
+ last = p;
+ if ((*(guchar *)p & 0xe0) == 0xc0) /* 110xxxxx */
+ {
+ if (G_UNLIKELY (max_len - (p - str) < 2))
+ goto error;
+
+ if (G_UNLIKELY ((*(guchar *)p & 0x1e) == 0))
+ goto error;
+ p++;
+ if (G_UNLIKELY ((*(guchar *)p & 0xc0) != 0x80)) /* 10xxxxxx */
+ goto error;
+ }
+ else
+ {
+ if ((*(guchar *)p & 0xf0) == 0xe0) /* 1110xxxx */
+ {
+ if (G_UNLIKELY (max_len - (p - str) < 3))
+ goto error;
+
+ min = (1 << 11);
+ val = *(guchar *)p & 0x0f;
+ goto TWO_REMAINING;
+ }
+ else if ((*(guchar *)p & 0xf8) == 0xf0) /* 11110xxx */
+ {
+ if (G_UNLIKELY (max_len - (p - str) < 4))
+ goto error;
+
+ min = (1 << 16);
+ val = *(guchar *)p & 0x07;
+ }
+ else
+ goto error;
+
+ p++;
+ CONTINUATION_CHAR;
+ TWO_REMAINING:
+ p++;
+ CONTINUATION_CHAR;
+ p++;
+ CONTINUATION_CHAR;
+
+ if (G_UNLIKELY (val < min))
+ goto error;
+ if (G_UNLIKELY (!UNICODE_VALID(val)))
+ goto error;
+ }
+
+ continue;
+
+ error:
+ return last;
+ }
+ }
+
+ return p;
+}
+
/**
* g_utf8_validate:
- * @str: a pointer to character data
- * @max_len: max bytes to validate, or -1 to go until nul
- * @end: return location for end of valid data
+ * @str: (array length=max_len) (element-type guint8): a pointer to character data
+ * @max_len: max bytes to validate, or -1 to go until NUL
+ * @end: (allow-none) (out) (transfer none): return location for end of valid data
*
* Validates UTF-8 encoded text. @str is the text to validate;
* if @str is nul-terminated, then @max_len can be -1, otherwise
* @max_len should be the number of bytes to validate.
* If @end is non-%NULL, then the end of the valid range
- * will be stored there (i.e. the address of the first invalid byte
- * if some bytes were invalid, or the end of the text being validated
- * otherwise).
+ * will be stored there (i.e. the start of the first invalid
+ * character if some bytes were invalid, or the end of the text
+ * being validated otherwise).
*
- * Returns TRUE if all of @str was valid. Many GLib and GTK+
- * routines <emphasis>require</emphasis> valid UTF8 as input;
- * so data read from a file or the network should be checked
- * with g_utf8_validate() before doing anything else with it.
+ * Note that g_utf8_validate() returns %FALSE if @max_len is
+ * positive and any of the @max_len bytes are nul.
+ *
+ * Returns %TRUE if all of @str was valid. Many GLib and GTK+
+ * routines require valid UTF-8 as input; so data read from a file
+ * or the network should be checked with g_utf8_validate() before
+ * doing anything else with it.
*
- * Return value: TRUE if the text was valid UTF-8.
- **/
+ * Returns: %TRUE if the text was valid UTF-8
+ */
gboolean
-g_utf8_validate (const gchar *str,
- gssize max_len,
- const gchar **end)
-{
+g_utf8_validate (const char *str,
+ gssize max_len,
+ const gchar **end)
+{
const gchar *p;
- g_return_val_if_fail (str != NULL, FALSE);
-
- if (end)
- *end = str;
-
- p = str;
-
- while ((max_len < 0 || (p - str) < max_len) && *p)
- {
- int i, mask = 0, len;
- gunichar result;
- unsigned char c = (unsigned char) *p;
-
- UTF8_COMPUTE (c, mask, len);
-
- if (len == -1)
- break;
-
- /* check that the expected number of bytes exists in str */
- if (max_len >= 0 &&
- ((max_len - (p - str)) < len))
- break;
-
- UTF8_GET (result, p, i, mask, len);
-
- if (UTF8_LENGTH (result) != len) /* Check for overlong UTF-8 */
- break;
-
- if (result == (gunichar)-1)
- break;
-
- if (!UNICODE_VALID (result))
- break;
-
- p += len;
- }
+ if (max_len < 0)
+ p = fast_validate (str);
+ else
+ p = fast_validate_len (str, max_len);
if (end)
*end = p;
- /* See that we covered the entire length if a length was
- * passed in, or that we ended on a nul if not
- */
- if (max_len >= 0 &&
- p != (str + max_len))
- return FALSE;
- else if (max_len < 0 &&
- *p != '\0')
+ if ((max_len >= 0 && p != str + max_len) ||
+ (max_len < 0 && *p != '\0'))
return FALSE;
else
return TRUE;
* integer values of @ch will not be valid. 0 is considered a valid
* character, though it's normally a string terminator.
*
- * Return value: %TRUE if @ch is a valid Unicode character
+ * Returns: %TRUE if @ch is a valid Unicode character
**/
gboolean
g_unichar_validate (gunichar ch)
{
return UNICODE_VALID (ch);
}
+
+/**
+ * g_utf8_strreverse:
+ * @str: a UTF-8 encoded string
+ * @len: the maximum length of @str to use, in bytes. If @len < 0,
+ * then the string is nul-terminated.
+ *
+ * Reverses a UTF-8 string. @str must be valid UTF-8 encoded text.
+ * (Use g_utf8_validate() on all text before trying to use UTF-8
+ * utility functions with it.)
+ *
+ * This function is intended for programmatic uses of reversed strings.
+ * It pays no attention to decomposed characters, combining marks, byte
+ * order marks, directional indicators (LRM, LRO, etc) and similar
+ * characters which might need special handling when reversing a string
+ * for display purposes.
+ *
+ * Note that unlike g_strreverse(), this function returns
+ * newly-allocated memory, which should be freed with g_free() when
+ * no longer needed.
+ *
+ * Returns: a newly-allocated string which is the reverse of @str
+ *
+ * Since: 2.2
+ */
+gchar *
+g_utf8_strreverse (const gchar *str,
+ gssize len)
+{
+ gchar *r, *result;
+ const gchar *p;
+
+ if (len < 0)
+ len = strlen (str);
+
+ result = g_new (gchar, len + 1);
+ r = result + len;
+ p = str;
+ while (r > result)
+ {
+ gchar *m, skip = g_utf8_skip[*(guchar*) p];
+ r -= skip;
+ for (m = r; skip; skip--)
+ *m++ = *p++;
+ }
+ result[len] = 0;
+
+ return result;
+}
+
+
+gchar *
+_g_utf8_make_valid (const gchar *name)
+{
+ GString *string;
+ const gchar *remainder, *invalid;
+ gint remaining_bytes, valid_bytes;
+
+ g_return_val_if_fail (name != NULL, NULL);
+
+ string = NULL;
+ remainder = name;
+ remaining_bytes = strlen (name);
+
+ while (remaining_bytes != 0)
+ {
+ if (g_utf8_validate (remainder, remaining_bytes, &invalid))
+ break;
+ valid_bytes = invalid - remainder;
+
+ if (string == NULL)
+ string = g_string_sized_new (remaining_bytes);
+
+ g_string_append_len (string, remainder, valid_bytes);
+ /* append U+FFFD REPLACEMENT CHARACTER */
+ g_string_append (string, "\357\277\275");
+
+ remaining_bytes -= valid_bytes + 1;
+ remainder = invalid + 1;
+ }
+
+ if (string == NULL)
+ return g_strdup (name);
+
+ g_string_append (string, remainder);
+
+ g_assert (g_utf8_validate (string->str, -1, NULL));
+
+ return g_string_free (string, FALSE);
+}
projects / platform / upstream / glib.git / blobdiff