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Diffstat (limited to 'protocols/Sametime/src/glib/guniprop.c')
| -rw-r--r-- | protocols/Sametime/src/glib/guniprop.c | 1304 |
1 files changed, 1304 insertions, 0 deletions
diff --git a/protocols/Sametime/src/glib/guniprop.c b/protocols/Sametime/src/glib/guniprop.c new file mode 100644 index 0000000000..639057434d --- /dev/null +++ b/protocols/Sametime/src/glib/guniprop.c @@ -0,0 +1,1304 @@ +/* guniprop.c - Unicode character properties. + * + * Copyright (C) 1999 Tom Tromey + * Copyright (C) 2000 Red Hat, Inc. + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * 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. + */ + +#include "config.h" + +#include <stdlib.h> +#include <stddef.h> +#include <string.h> +#include <locale.h> + +#include "gmem.h" +#include "gstring.h" +#include "gtestutils.h" +#include "gtypes.h" +#include "gunicode.h" +#include "gunichartables.h" +#include "gmirroringtable.h" +#include "gscripttable.h" +#include "gunicodeprivate.h" +#ifdef G_OS_WIN32 +#include "gwin32.h" +#endif + +#define ATTR_TABLE(Page) (((Page) <= G_UNICODE_LAST_PAGE_PART1) \ + ? attr_table_part1[Page] \ + : attr_table_part2[(Page) - 0xe00]) + +#define ATTTABLE(Page, Char) \ + ((ATTR_TABLE(Page) == G_UNICODE_MAX_TABLE_INDEX) ? 0 : (attr_data[ATTR_TABLE(Page)][Char])) + +#define TTYPE_PART1(Page, Char) \ + ((type_table_part1[Page] >= G_UNICODE_MAX_TABLE_INDEX) \ + ? (type_table_part1[Page] - G_UNICODE_MAX_TABLE_INDEX) \ + : (type_data[type_table_part1[Page]][Char])) + +#define TTYPE_PART2(Page, Char) \ + ((type_table_part2[Page] >= G_UNICODE_MAX_TABLE_INDEX) \ + ? (type_table_part2[Page] - G_UNICODE_MAX_TABLE_INDEX) \ + : (type_data[type_table_part2[Page]][Char])) + +#define TYPE(Char) \ + (((Char) <= G_UNICODE_LAST_CHAR_PART1) \ + ? TTYPE_PART1 ((Char) >> 8, (Char) & 0xff) \ + : (((Char) >= 0xe0000 && (Char) <= G_UNICODE_LAST_CHAR) \ + ? TTYPE_PART2 (((Char) - 0xe0000) >> 8, (Char) & 0xff) \ + : G_UNICODE_UNASSIGNED)) + + +#define IS(Type, Class) (((guint)1 << (Type)) & (Class)) +#define OR(Type, Rest) (((guint)1 << (Type)) | (Rest)) + + + +#define ISALPHA(Type) IS ((Type), \ + OR (G_UNICODE_LOWERCASE_LETTER, \ + OR (G_UNICODE_UPPERCASE_LETTER, \ + OR (G_UNICODE_TITLECASE_LETTER, \ + OR (G_UNICODE_MODIFIER_LETTER, \ + OR (G_UNICODE_OTHER_LETTER, 0)))))) + +#define ISALDIGIT(Type) IS ((Type), \ + OR (G_UNICODE_DECIMAL_NUMBER, \ + OR (G_UNICODE_LETTER_NUMBER, \ + OR (G_UNICODE_OTHER_NUMBER, \ + OR (G_UNICODE_LOWERCASE_LETTER, \ + OR (G_UNICODE_UPPERCASE_LETTER, \ + OR (G_UNICODE_TITLECASE_LETTER, \ + OR (G_UNICODE_MODIFIER_LETTER, \ + OR (G_UNICODE_OTHER_LETTER, 0))))))))) + +#define ISMARK(Type) IS ((Type), \ + OR (G_UNICODE_NON_SPACING_MARK, \ + OR (G_UNICODE_COMBINING_MARK, \ + OR (G_UNICODE_ENCLOSING_MARK, 0)))) + +#define ISZEROWIDTHTYPE(Type) IS ((Type), \ + OR (G_UNICODE_NON_SPACING_MARK, \ + OR (G_UNICODE_ENCLOSING_MARK, \ + OR (G_UNICODE_FORMAT, 0)))) + +/** + * g_unichar_isalnum: + * @c: a Unicode character + * + * Determines whether a character is alphanumeric. + * Given some UTF-8 text, obtain a character value + * with g_utf8_get_char(). + * + * Return value: %TRUE if @c is an alphanumeric character + **/ +gboolean +g_unichar_isalnum (gunichar c) +{ + return ISALDIGIT (TYPE (c)) ? TRUE : FALSE; +} + +/** + * g_unichar_isalpha: + * @c: a Unicode character + * + * Determines whether a character is alphabetic (i.e. a letter). + * Given some UTF-8 text, obtain a character value with + * g_utf8_get_char(). + * + * Return value: %TRUE if @c is an alphabetic character + **/ +gboolean +g_unichar_isalpha (gunichar c) +{ + return ISALPHA (TYPE (c)) ? TRUE : FALSE; +} + + +/** + * g_unichar_iscntrl: + * @c: a Unicode character + * + * Determines whether a character is a control character. + * Given some UTF-8 text, obtain a character value with + * g_utf8_get_char(). + * + * Return value: %TRUE if @c is a control character + **/ +gboolean +g_unichar_iscntrl (gunichar c) +{ + return TYPE (c) == G_UNICODE_CONTROL; +} + +/** + * g_unichar_isdigit: + * @c: a Unicode character + * + * Determines whether a character is numeric (i.e. a digit). This + * covers ASCII 0-9 and also digits in other languages/scripts. Given + * some UTF-8 text, obtain a character value with g_utf8_get_char(). + * + * Return value: %TRUE if @c is a digit + **/ +gboolean +g_unichar_isdigit (gunichar c) +{ + return TYPE (c) == G_UNICODE_DECIMAL_NUMBER; +} + + +/** + * g_unichar_isgraph: + * @c: a Unicode character + * + * Determines whether a character is printable and not a space + * (returns %FALSE for control characters, format characters, and + * spaces). g_unichar_isprint() is similar, but returns %TRUE for + * spaces. Given some UTF-8 text, obtain a character value with + * g_utf8_get_char(). + * + * Return value: %TRUE if @c is printable unless it's a space + **/ +gboolean +g_unichar_isgraph (gunichar c) +{ + return !IS (TYPE(c), + OR (G_UNICODE_CONTROL, + OR (G_UNICODE_FORMAT, + OR (G_UNICODE_UNASSIGNED, + OR (G_UNICODE_SURROGATE, + OR (G_UNICODE_SPACE_SEPARATOR, + 0)))))); +} + +/** + * g_unichar_islower: + * @c: a Unicode character + * + * Determines whether a character is a lowercase letter. + * Given some UTF-8 text, obtain a character value with + * g_utf8_get_char(). + * + * Return value: %TRUE if @c is a lowercase letter + **/ +gboolean +g_unichar_islower (gunichar c) +{ + return TYPE (c) == G_UNICODE_LOWERCASE_LETTER; +} + + +/** + * g_unichar_isprint: + * @c: a Unicode character + * + * Determines whether a character is printable. + * Unlike g_unichar_isgraph(), returns %TRUE for spaces. + * Given some UTF-8 text, obtain a character value with + * g_utf8_get_char(). + * + * Return value: %TRUE if @c is printable + **/ +gboolean +g_unichar_isprint (gunichar c) +{ + return !IS (TYPE(c), + OR (G_UNICODE_CONTROL, + OR (G_UNICODE_FORMAT, + OR (G_UNICODE_UNASSIGNED, + OR (G_UNICODE_SURROGATE, + 0))))); +} + +/** + * g_unichar_ispunct: + * @c: a Unicode character + * + * Determines whether a character is punctuation or a symbol. + * Given some UTF-8 text, obtain a character value with + * g_utf8_get_char(). + * + * Return value: %TRUE if @c is a punctuation or symbol character + **/ +gboolean +g_unichar_ispunct (gunichar c) +{ + return IS (TYPE(c), + OR (G_UNICODE_CONNECT_PUNCTUATION, + OR (G_UNICODE_DASH_PUNCTUATION, + OR (G_UNICODE_CLOSE_PUNCTUATION, + OR (G_UNICODE_FINAL_PUNCTUATION, + OR (G_UNICODE_INITIAL_PUNCTUATION, + OR (G_UNICODE_OTHER_PUNCTUATION, + OR (G_UNICODE_OPEN_PUNCTUATION, + OR (G_UNICODE_CURRENCY_SYMBOL, + OR (G_UNICODE_MODIFIER_SYMBOL, + OR (G_UNICODE_MATH_SYMBOL, + OR (G_UNICODE_OTHER_SYMBOL, + 0)))))))))))) ? TRUE : FALSE; +} + +/** + * g_unichar_isspace: + * @c: a Unicode character + * + * Determines whether a character is a space, tab, or line separator + * (newline, carriage return, etc.). Given some UTF-8 text, obtain a + * character value with g_utf8_get_char(). + * + * (Note: don't use this to do word breaking; you have to use + * Pango or equivalent to get word breaking right, the algorithm + * is fairly complex.) + * + * Return value: %TRUE if @c is a space character + **/ +gboolean +g_unichar_isspace (gunichar c) +{ + switch (c) + { + /* special-case these since Unicode thinks they are not spaces */ + case '\t': + case '\n': + case '\r': + case '\f': + return TRUE; + break; + + default: + { + return IS (TYPE(c), + OR (G_UNICODE_SPACE_SEPARATOR, + OR (G_UNICODE_LINE_SEPARATOR, + OR (G_UNICODE_PARAGRAPH_SEPARATOR, + 0)))) ? TRUE : FALSE; + } + break; + } +} + +/** + * g_unichar_ismark: + * @c: a Unicode character + * + * Determines whether a character is a mark (non-spacing mark, + * combining mark, or enclosing mark in Unicode speak). + * Given some UTF-8 text, obtain a character value + * with g_utf8_get_char(). + * + * Note: in most cases where isalpha characters are allowed, + * ismark characters should be allowed to as they are essential + * for writing most European languages as well as many non-Latin + * scripts. + * + * Return value: %TRUE if @c is a mark character + * + * Since: 2.14 + **/ +gboolean +g_unichar_ismark (gunichar c) +{ + return ISMARK (TYPE (c)); +} + +/** + * g_unichar_isupper: + * @c: a Unicode character + * + * Determines if a character is uppercase. + * + * Return value: %TRUE if @c is an uppercase character + **/ +gboolean +g_unichar_isupper (gunichar c) +{ + return TYPE (c) == G_UNICODE_UPPERCASE_LETTER; +} + +/** + * g_unichar_istitle: + * @c: a Unicode character + * + * Determines if a character is titlecase. Some characters in + * Unicode which are composites, such as the DZ digraph + * have three case variants instead of just two. The titlecase + * form is used at the beginning of a word where only the + * first letter is capitalized. The titlecase form of the DZ + * digraph is U+01F2 LATIN CAPITAL LETTTER D WITH SMALL LETTER Z. + * + * Return value: %TRUE if the character is titlecase + **/ +gboolean +g_unichar_istitle (gunichar c) +{ + unsigned int i; + for (i = 0; i < G_N_ELEMENTS (title_table); ++i) + if (title_table[i][0] == c) + return TRUE; + return FALSE; +} + +/** + * g_unichar_isxdigit: + * @c: a Unicode character. + * + * Determines if a character is a hexidecimal digit. + * + * Return value: %TRUE if the character is a hexadecimal digit + **/ +gboolean +g_unichar_isxdigit (gunichar c) +{ + return ((c >= 'a' && c <= 'f') + || (c >= 'A' && c <= 'F') + || (TYPE (c) == G_UNICODE_DECIMAL_NUMBER)); +} + +/** + * g_unichar_isdefined: + * @c: a Unicode character + * + * Determines if a given character is assigned in the Unicode + * standard. + * + * Return value: %TRUE if the character has an assigned value + **/ +gboolean +g_unichar_isdefined (gunichar c) +{ + return !IS (TYPE(c), + OR (G_UNICODE_UNASSIGNED, + OR (G_UNICODE_SURROGATE, + 0))); +} + +/** + * g_unichar_iszerowidth: + * @c: a Unicode character + * + * Determines if a given character typically takes zero width when rendered. + * The return value is %TRUE for all non-spacing and enclosing marks + * (e.g., combining accents), format characters, zero-width + * space, but not U+00AD SOFT HYPHEN. + * + * A typical use of this function is with one of g_unichar_iswide() or + * g_unichar_iswide_cjk() to determine the number of cells a string occupies + * when displayed on a grid display (terminals). However, note that not all + * terminals support zero-width rendering of zero-width marks. + * + * Return value: %TRUE if the character has zero width + * + * Since: 2.14 + **/ +gboolean +g_unichar_iszerowidth (gunichar c) +{ + if (G_UNLIKELY (c == 0x00AD)) + return FALSE; + + if (G_UNLIKELY (ISZEROWIDTHTYPE (TYPE (c)))) + return TRUE; + + if (G_UNLIKELY ((c >= 0x1160 && c < 0x1200) || + c == 0x200B)) + return TRUE; + + return FALSE; +} + +struct Interval +{ + gunichar start, end; +}; + +static int +interval_compare (const void *key, const void *elt) +{ + gunichar c = GPOINTER_TO_UINT (key); + struct Interval *interval = (struct Interval *)elt; + + if (c < interval->start) + return -1; + if (c > interval->end) + return +1; + + return 0; +} + +/** + * g_unichar_iswide: + * @c: a Unicode character + * + * Determines if a character is typically rendered in a double-width + * cell. + * + * Return value: %TRUE if the character is wide + **/ +gboolean +g_unichar_iswide (gunichar c) +{ + /* sorted list of intervals of East_Asian_Width = W and F characters + * from Unicode 5.1.0. produced by mungling output of: + * grep ';[FW]\>' EastAsianWidth.txt */ + static const struct Interval wide[] = { + {0x1100, 0x1159}, {0x115F, 0x115F}, {0x2329, 0x232A}, {0x2E80, 0x2E99}, + {0x2E9B, 0x2EF3}, {0x2F00, 0x2FD5}, {0x2FF0, 0x2FFB}, {0x3000, 0x303E}, + {0x3041, 0x3096}, {0x3099, 0x30FF}, {0x3105, 0x312D}, {0x3131, 0x318E}, + {0x3190, 0x31B7}, {0x31C0, 0x31E3}, {0x31F0, 0x321E}, {0x3220, 0x3243}, + {0x3250, 0x32FE}, {0x3300, 0x4DB5}, {0x4E00, 0x9FC3}, {0xA000, 0xA48C}, + {0xA490, 0xA4C6}, {0xAC00, 0xD7A3}, {0xF900, 0xFA2D}, {0xFA30, 0xFA6A}, + {0xFA70, 0xFAD9}, {0xFE10, 0xFE19}, {0xFE30, 0xFE52}, {0xFE54, 0xFE66}, + {0xFE68, 0xFE6B}, {0xFF01, 0xFF60}, {0xFFE0, 0xFFE6}, {0x20000, 0x2FFFD}, + {0x30000, 0x3FFFD} + }; + + if (bsearch (GUINT_TO_POINTER (c), wide, G_N_ELEMENTS (wide), sizeof wide[0], + interval_compare)) + return TRUE; + + return FALSE; +} + + +/** + * g_unichar_iswide_cjk: + * @c: a Unicode character + * + * Determines if a character is typically rendered in a double-width + * cell under legacy East Asian locales. If a character is wide according to + * g_unichar_iswide(), then it is also reported wide with this function, but + * the converse is not necessarily true. See the + * <ulink url="http://www.unicode.org/reports/tr11/">Unicode Standard + * Annex #11</ulink> for details. + * + * If a character passes the g_unichar_iswide() test then it will also pass + * this test, but not the other way around. Note that some characters may + * pas both this test and g_unichar_iszerowidth(). + * + * Return value: %TRUE if the character is wide in legacy East Asian locales + * + * Since: 2.12 + */ +gboolean +g_unichar_iswide_cjk (gunichar c) +{ + /* sorted list of intervals of East_Asian_Width = A and F characters + * from Unicode 5.1.0. produced by mungling output of: + * grep ';[A]\>' EastAsianWidth.txt */ + static const struct Interval ambiguous[] = { + {0x00A1, 0x00A1}, {0x00A4, 0x00A4}, {0x00A7, 0x00A8}, {0x00AA, 0x00AA}, + {0x00AD, 0x00AE}, {0x00B0, 0x00B4}, {0x00B6, 0x00BA}, {0x00BC, 0x00BF}, + {0x00C6, 0x00C6}, {0x00D0, 0x00D0}, {0x00D7, 0x00D8}, {0x00DE, 0x00E1}, + {0x00E6, 0x00E6}, {0x00E8, 0x00EA}, {0x00EC, 0x00ED}, {0x00F0, 0x00F0}, + {0x00F2, 0x00F3}, {0x00F7, 0x00FA}, {0x00FC, 0x00FC}, {0x00FE, 0x00FE}, + {0x0101, 0x0101}, {0x0111, 0x0111}, {0x0113, 0x0113}, {0x011B, 0x011B}, + {0x0126, 0x0127}, {0x012B, 0x012B}, {0x0131, 0x0133}, {0x0138, 0x0138}, + {0x013F, 0x0142}, {0x0144, 0x0144}, {0x0148, 0x014B}, {0x014D, 0x014D}, + {0x0152, 0x0153}, {0x0166, 0x0167}, {0x016B, 0x016B}, {0x01CE, 0x01CE}, + {0x01D0, 0x01D0}, {0x01D2, 0x01D2}, {0x01D4, 0x01D4}, {0x01D6, 0x01D6}, + {0x01D8, 0x01D8}, {0x01DA, 0x01DA}, {0x01DC, 0x01DC}, {0x0251, 0x0251}, + {0x0261, 0x0261}, {0x02C4, 0x02C4}, {0x02C7, 0x02C7}, {0x02C9, 0x02CB}, + {0x02CD, 0x02CD}, {0x02D0, 0x02D0}, {0x02D8, 0x02DB}, {0x02DD, 0x02DD}, + {0x02DF, 0x02DF}, {0x0300, 0x036F}, {0x0391, 0x03A1}, {0x03A3, 0x03A9}, + {0x03B1, 0x03C1}, {0x03C3, 0x03C9}, {0x0401, 0x0401}, {0x0410, 0x044F}, + {0x0451, 0x0451}, {0x2010, 0x2010}, {0x2013, 0x2016}, {0x2018, 0x2019}, + {0x201C, 0x201D}, {0x2020, 0x2022}, {0x2024, 0x2027}, {0x2030, 0x2030}, + {0x2032, 0x2033}, {0x2035, 0x2035}, {0x203B, 0x203B}, {0x203E, 0x203E}, + {0x2074, 0x2074}, {0x207F, 0x207F}, {0x2081, 0x2084}, {0x20AC, 0x20AC}, + {0x2103, 0x2103}, {0x2105, 0x2105}, {0x2109, 0x2109}, {0x2113, 0x2113}, + {0x2116, 0x2116}, {0x2121, 0x2122}, {0x2126, 0x2126}, {0x212B, 0x212B}, + {0x2153, 0x2154}, {0x215B, 0x215E}, {0x2160, 0x216B}, {0x2170, 0x2179}, + {0x2190, 0x2199}, {0x21B8, 0x21B9}, {0x21D2, 0x21D2}, {0x21D4, 0x21D4}, + {0x21E7, 0x21E7}, {0x2200, 0x2200}, {0x2202, 0x2203}, {0x2207, 0x2208}, + {0x220B, 0x220B}, {0x220F, 0x220F}, {0x2211, 0x2211}, {0x2215, 0x2215}, + {0x221A, 0x221A}, {0x221D, 0x2220}, {0x2223, 0x2223}, {0x2225, 0x2225}, + {0x2227, 0x222C}, {0x222E, 0x222E}, {0x2234, 0x2237}, {0x223C, 0x223D}, + {0x2248, 0x2248}, {0x224C, 0x224C}, {0x2252, 0x2252}, {0x2260, 0x2261}, + {0x2264, 0x2267}, {0x226A, 0x226B}, {0x226E, 0x226F}, {0x2282, 0x2283}, + {0x2286, 0x2287}, {0x2295, 0x2295}, {0x2299, 0x2299}, {0x22A5, 0x22A5}, + {0x22BF, 0x22BF}, {0x2312, 0x2312}, {0x2460, 0x24E9}, {0x24EB, 0x254B}, + {0x2550, 0x2573}, {0x2580, 0x258F}, {0x2592, 0x2595}, {0x25A0, 0x25A1}, + {0x25A3, 0x25A9}, {0x25B2, 0x25B3}, {0x25B6, 0x25B7}, {0x25BC, 0x25BD}, + {0x25C0, 0x25C1}, {0x25C6, 0x25C8}, {0x25CB, 0x25CB}, {0x25CE, 0x25D1}, + {0x25E2, 0x25E5}, {0x25EF, 0x25EF}, {0x2605, 0x2606}, {0x2609, 0x2609}, + {0x260E, 0x260F}, {0x2614, 0x2615}, {0x261C, 0x261C}, {0x261E, 0x261E}, + {0x2640, 0x2640}, {0x2642, 0x2642}, {0x2660, 0x2661}, {0x2663, 0x2665}, + {0x2667, 0x266A}, {0x266C, 0x266D}, {0x266F, 0x266F}, {0x273D, 0x273D}, + {0x2776, 0x277F}, {0xE000, 0xF8FF}, {0xFE00, 0xFE0F}, {0xFFFD, 0xFFFD}, + {0xE0100, 0xE01EF}, {0xF0000, 0xFFFFD}, {0x100000, 0x10FFFD} + }; + + if (g_unichar_iswide (c)) + return TRUE; + + if (bsearch (GUINT_TO_POINTER (c), ambiguous, G_N_ELEMENTS (ambiguous), sizeof ambiguous[0], + interval_compare)) + return TRUE; + + return FALSE; +} + + +/** + * g_unichar_toupper: + * @c: a Unicode character + * + * Converts a character to uppercase. + * + * Return value: the result of converting @c to uppercase. + * If @c is not an lowercase or titlecase character, + * or has no upper case equivalent @c is returned unchanged. + **/ +gunichar +g_unichar_toupper (gunichar c) +{ + int t = TYPE (c); + if (t == G_UNICODE_LOWERCASE_LETTER) + { + gunichar val = ATTTABLE (c >> 8, c & 0xff); + if (val >= 0x1000000) + { + const gchar *p = special_case_table + val - 0x1000000; + val = g_utf8_get_char (p); + } + /* Some lowercase letters, e.g., U+000AA, FEMININE ORDINAL INDICATOR, + * do not have an uppercase equivalent, in which case val will be + * zero. + */ + return val ? val : c; + } + else if (t == G_UNICODE_TITLECASE_LETTER) + { + unsigned int i; + for (i = 0; i < G_N_ELEMENTS (title_table); ++i) + { + if (title_table[i][0] == c) + return title_table[i][1]; + } + } + return c; +} + +/** + * g_unichar_tolower: + * @c: a Unicode character. + * + * Converts a character to lower case. + * + * Return value: the result of converting @c to lower case. + * If @c is not an upperlower or titlecase character, + * or has no lowercase equivalent @c is returned unchanged. + **/ +gunichar +g_unichar_tolower (gunichar c) +{ + int t = TYPE (c); + if (t == G_UNICODE_UPPERCASE_LETTER) + { + gunichar val = ATTTABLE (c >> 8, c & 0xff); + if (val >= 0x1000000) + { + const gchar *p = special_case_table + val - 0x1000000; + return g_utf8_get_char (p); + } + else + { + /* Not all uppercase letters are guaranteed to have a lowercase + * equivalent. If this is the case, val will be zero. */ + return val ? val : c; + } + } + else if (t == G_UNICODE_TITLECASE_LETTER) + { + unsigned int i; + for (i = 0; i < G_N_ELEMENTS (title_table); ++i) + { + if (title_table[i][0] == c) + return title_table[i][2]; + } + } + return c; +} + +/** + * g_unichar_totitle: + * @c: a Unicode character + * + * Converts a character to the titlecase. + * + * Return value: the result of converting @c to titlecase. + * If @c is not an uppercase or lowercase character, + * @c is returned unchanged. + **/ +gunichar +g_unichar_totitle (gunichar c) +{ + unsigned int i; + for (i = 0; i < G_N_ELEMENTS (title_table); ++i) + { + if (title_table[i][0] == c || title_table[i][1] == c + || title_table[i][2] == c) + return title_table[i][0]; + } + + if (TYPE (c) == G_UNICODE_LOWERCASE_LETTER) + return g_unichar_toupper (c); + + return c; +} + +/** + * g_unichar_digit_value: + * @c: a Unicode character + * + * Determines the numeric value of a character as a decimal + * digit. + * + * Return value: If @c is a decimal digit (according to + * g_unichar_isdigit()), its numeric value. Otherwise, -1. + **/ +int +g_unichar_digit_value (gunichar c) +{ + if (TYPE (c) == G_UNICODE_DECIMAL_NUMBER) + return ATTTABLE (c >> 8, c & 0xff); + return -1; +} + +/** + * g_unichar_xdigit_value: + * @c: a Unicode character + * + * Determines the numeric value of a character as a hexidecimal + * digit. + * + * Return value: If @c is a hex digit (according to + * g_unichar_isxdigit()), its numeric value. Otherwise, -1. + **/ +int +g_unichar_xdigit_value (gunichar c) +{ + if (c >= 'A' && c <= 'F') + return c - 'A' + 10; + if (c >= 'a' && c <= 'f') + return c - 'a' + 10; + if (TYPE (c) == G_UNICODE_DECIMAL_NUMBER) + return ATTTABLE (c >> 8, c & 0xff); + return -1; +} + +/** + * g_unichar_type: + * @c: a Unicode character + * + * Classifies a Unicode character by type. + * + * Return value: the type of the character. + **/ +GUnicodeType +g_unichar_type (gunichar c) +{ + return TYPE (c); +} + +/* + * Case mapping functions + */ + +typedef enum { + LOCALE_NORMAL, + LOCALE_TURKIC, + LOCALE_LITHUANIAN +} LocaleType; + +static LocaleType +get_locale_type (void) +{ +#ifdef G_OS_WIN32 + char *tem = g_win32_getlocale (); + char locale[2]; + + locale[0] = tem[0]; + locale[1] = tem[1]; + g_free (tem); +#else + const char *locale = setlocale (LC_CTYPE, NULL); +#endif + + switch (locale[0]) + { + case 'a': + if (locale[1] == 'z') + return LOCALE_TURKIC; + break; + case 'l': + if (locale[1] == 't') + return LOCALE_LITHUANIAN; + break; + case 't': + if (locale[1] == 'r') + return LOCALE_TURKIC; + break; + } + + return LOCALE_NORMAL; +} + +static gint +output_marks (const char **p_inout, + char *out_buffer, + gboolean remove_dot) +{ + const char *p = *p_inout; + gint len = 0; + + while (*p) + { + gunichar c = g_utf8_get_char (p); + + if (ISMARK (TYPE (c))) + { + if (!remove_dot || c != 0x307 /* COMBINING DOT ABOVE */) + len += g_unichar_to_utf8 (c, out_buffer ? out_buffer + len : NULL); + p = g_utf8_next_char (p); + } + else + break; + } + + *p_inout = p; + return len; +} + +static gint +output_special_case (gchar *out_buffer, + int offset, + int type, + int which) +{ + const gchar *p = special_case_table + offset; + gint len; + + if (type != G_UNICODE_TITLECASE_LETTER) + p = g_utf8_next_char (p); + + if (which == 1) + p += strlen (p) + 1; + + len = strlen (p); + if (out_buffer) + memcpy (out_buffer, p, len); + + return len; +} + +static gsize +real_toupper (const gchar *str, + gssize max_len, + gchar *out_buffer, + LocaleType locale_type) +{ + const gchar *p = str; + const char *last = NULL; + gsize len = 0; + gboolean last_was_i = FALSE; + + while ((max_len < 0 || p < str + max_len) && *p) + { + gunichar c = g_utf8_get_char (p); + int t = TYPE (c); + gunichar val; + + last = p; + p = g_utf8_next_char (p); + + if (locale_type == LOCALE_LITHUANIAN) + { + if (c == 'i') + last_was_i = TRUE; + else + { + if (last_was_i) + { + /* Nasty, need to remove any dot above. Though + * I think only E WITH DOT ABOVE occurs in practice + * which could simplify this considerably. + */ + gsize decomp_len, i; + gunichar *decomp; + + decomp = g_unicode_canonical_decomposition (c, &decomp_len); + for (i=0; i < decomp_len; i++) + { + if (decomp[i] != 0x307 /* COMBINING DOT ABOVE */) + len += g_unichar_to_utf8 (g_unichar_toupper (decomp[i]), out_buffer ? out_buffer + len : NULL); + } + g_free (decomp); + + len += output_marks (&p, out_buffer ? out_buffer + len : NULL, TRUE); + + continue; + } + + if (!ISMARK (t)) + last_was_i = FALSE; + } + } + + if (locale_type == LOCALE_TURKIC && c == 'i') + { + /* i => LATIN CAPITAL LETTER I WITH DOT ABOVE */ + len += g_unichar_to_utf8 (0x130, out_buffer ? out_buffer + len : NULL); + } + else if (c == 0x0345) /* COMBINING GREEK YPOGEGRAMMENI */ + { + /* Nasty, need to move it after other combining marks .. this would go away if + * we normalized first. + */ + len += output_marks (&p, out_buffer ? out_buffer + len : NULL, FALSE); + + /* And output as GREEK CAPITAL LETTER IOTA */ + len += g_unichar_to_utf8 (0x399, out_buffer ? out_buffer + len : NULL); + } + else if (IS (t, + OR (G_UNICODE_LOWERCASE_LETTER, + OR (G_UNICODE_TITLECASE_LETTER, + 0)))) + { + val = ATTTABLE (c >> 8, c & 0xff); + + if (val >= 0x1000000) + { + len += output_special_case (out_buffer ? out_buffer + len : NULL, val - 0x1000000, t, + t == G_UNICODE_LOWERCASE_LETTER ? 0 : 1); + } + else + { + if (t == G_UNICODE_TITLECASE_LETTER) + { + unsigned int i; + for (i = 0; i < G_N_ELEMENTS (title_table); ++i) + { + if (title_table[i][0] == c) + { + val = title_table[i][1]; + break; + } + } + } + + /* Some lowercase letters, e.g., U+000AA, FEMININE ORDINAL INDICATOR, + * do not have an uppercase equivalent, in which case val will be + * zero. */ + len += g_unichar_to_utf8 (val ? val : c, out_buffer ? out_buffer + len : NULL); + } + } + else + { + gsize char_len = g_utf8_skip[*(guchar *)last]; + + if (out_buffer) + memcpy (out_buffer + len, last, char_len); + + len += char_len; + } + + } + + return len; +} + +/** + * g_utf8_strup: + * @str: a UTF-8 encoded string + * @len: length of @str, in bytes, or -1 if @str is nul-terminated. + * + * Converts all Unicode characters in the string that have a case + * to uppercase. The exact manner that this is done depends + * on the current locale, and may result in the number of + * characters in the string increasing. (For instance, the + * German ess-zet will be changed to SS.) + * + * Return value: a newly allocated string, with all characters + * converted to uppercase. + **/ +gchar * +g_utf8_strup (const gchar *str, + gssize len) +{ + gsize result_len; + LocaleType locale_type; + gchar *result; + + g_return_val_if_fail (str != NULL, NULL); + + locale_type = get_locale_type (); + + /* + * We use a two pass approach to keep memory management simple + */ + result_len = real_toupper (str, len, NULL, locale_type); + result = g_malloc (result_len + 1); + real_toupper (str, len, result, locale_type); + result[result_len] = '\0'; + + return result; +} + +/* traverses the string checking for characters with combining class == 230 + * until a base character is found */ +static gboolean +has_more_above (const gchar *str) +{ + const gchar *p = str; + gint combining_class; + + while (*p) + { + combining_class = g_unichar_combining_class (g_utf8_get_char (p)); + if (combining_class == 230) + return TRUE; + else if (combining_class == 0) + break; + + p = g_utf8_next_char (p); + } + + return FALSE; +} + +static gsize +real_tolower (const gchar *str, + gssize max_len, + gchar *out_buffer, + LocaleType locale_type) +{ + const gchar *p = str; + const char *last = NULL; + gsize len = 0; + + while ((max_len < 0 || p < str + max_len) && *p) + { + gunichar c = g_utf8_get_char (p); + int t = TYPE (c); + gunichar val; + + last = p; + p = g_utf8_next_char (p); + + if (locale_type == LOCALE_TURKIC && c == 'I') + { + if (g_utf8_get_char (p) == 0x0307) + { + /* I + COMBINING DOT ABOVE => i (U+0069) */ + len += g_unichar_to_utf8 (0x0069, out_buffer ? out_buffer + len : NULL); + p = g_utf8_next_char (p); + } + else + { + /* I => LATIN SMALL LETTER DOTLESS I */ + len += g_unichar_to_utf8 (0x131, out_buffer ? out_buffer + len : NULL); + } + } + /* Introduce an explicit dot above when lowercasing capital I's and J's + * whenever there are more accents above. [SpecialCasing.txt] */ + else if (locale_type == LOCALE_LITHUANIAN && + (c == 0x00cc || c == 0x00cd || c == 0x0128)) + { + len += g_unichar_to_utf8 (0x0069, out_buffer ? out_buffer + len : NULL); + len += g_unichar_to_utf8 (0x0307, out_buffer ? out_buffer + len : NULL); + + switch (c) + { + case 0x00cc: + len += g_unichar_to_utf8 (0x0300, out_buffer ? out_buffer + len : NULL); + break; + case 0x00cd: + len += g_unichar_to_utf8 (0x0301, out_buffer ? out_buffer + len : NULL); + break; + case 0x0128: + len += g_unichar_to_utf8 (0x0303, out_buffer ? out_buffer + len : NULL); + break; + } + } + else if (locale_type == LOCALE_LITHUANIAN && + (c == 'I' || c == 'J' || c == 0x012e) && + has_more_above (p)) + { + len += g_unichar_to_utf8 (g_unichar_tolower (c), out_buffer ? out_buffer + len : NULL); + len += g_unichar_to_utf8 (0x0307, out_buffer ? out_buffer + len : NULL); + } + else if (c == 0x03A3) /* GREEK CAPITAL LETTER SIGMA */ + { + if ((max_len < 0 || p < str + max_len) && *p) + { + gunichar next_c = g_utf8_get_char (p); + int next_type = TYPE(next_c); + + /* SIGMA mapps differently depending on whether it is + * final or not. The following simplified test would + * fail in the case of combining marks following the + * sigma, but I don't think that occurs in real text. + * The test here matches that in ICU. + */ + if (ISALPHA (next_type)) /* Lu,Ll,Lt,Lm,Lo */ + val = 0x3c3; /* GREEK SMALL SIGMA */ + else + val = 0x3c2; /* GREEK SMALL FINAL SIGMA */ + } + else + val = 0x3c2; /* GREEK SMALL FINAL SIGMA */ + + len += g_unichar_to_utf8 (val, out_buffer ? out_buffer + len : NULL); + } + else if (IS (t, + OR (G_UNICODE_UPPERCASE_LETTER, + OR (G_UNICODE_TITLECASE_LETTER, + 0)))) + { + val = ATTTABLE (c >> 8, c & 0xff); + + if (val >= 0x1000000) + { + len += output_special_case (out_buffer ? out_buffer + len : NULL, val - 0x1000000, t, 0); + } + else + { + if (t == G_UNICODE_TITLECASE_LETTER) + { + unsigned int i; + for (i = 0; i < G_N_ELEMENTS (title_table); ++i) + { + if (title_table[i][0] == c) + { + val = title_table[i][2]; + break; + } + } + } + + /* Not all uppercase letters are guaranteed to have a lowercase + * equivalent. If this is the case, val will be zero. */ + len += g_unichar_to_utf8 (val ? val : c, out_buffer ? out_buffer + len : NULL); + } + } + else + { + gsize char_len = g_utf8_skip[*(guchar *)last]; + + if (out_buffer) + memcpy (out_buffer + len, last, char_len); + + len += char_len; + } + + } + + return len; +} + +/** + * g_utf8_strdown: + * @str: a UTF-8 encoded string + * @len: length of @str, in bytes, or -1 if @str is nul-terminated. + * + * Converts all Unicode characters in the string that have a case + * to lowercase. The exact manner that this is done depends + * on the current locale, and may result in the number of + * characters in the string changing. + * + * Return value: a newly allocated string, with all characters + * converted to lowercase. + **/ +gchar * +g_utf8_strdown (const gchar *str, + gssize len) +{ + gsize result_len; + LocaleType locale_type; + gchar *result; + + g_return_val_if_fail (str != NULL, NULL); + + locale_type = get_locale_type (); + + /* + * We use a two pass approach to keep memory management simple + */ + result_len = real_tolower (str, len, NULL, locale_type); + result = g_malloc (result_len + 1); + real_tolower (str, len, result, locale_type); + result[result_len] = '\0'; + + return result; +} + +/** + * g_utf8_casefold: + * @str: a UTF-8 encoded string + * @len: length of @str, in bytes, or -1 if @str is nul-terminated. + * + * Converts a string into a form that is independent of case. The + * result will not correspond to any particular case, but can be + * compared for equality or ordered with the results of calling + * g_utf8_casefold() on other strings. + * + * Note that calling g_utf8_casefold() followed by g_utf8_collate() is + * only an approximation to the correct linguistic case insensitive + * ordering, though it is a fairly good one. Getting this exactly + * right would require a more sophisticated collation function that + * takes case sensitivity into account. GLib does not currently + * provide such a function. + * + * Return value: a newly allocated string, that is a + * case independent form of @str. + **/ +gchar * +g_utf8_casefold (const gchar *str, + gssize len) +{ + GString *result; + const char *p; + + g_return_val_if_fail (str != NULL, NULL); + + result = g_string_new (NULL); + p = str; + while ((len < 0 || p < str + len) && *p) + { + gunichar ch = g_utf8_get_char (p); + + int start = 0; + int end = G_N_ELEMENTS (casefold_table); + + if (ch >= casefold_table[start].ch && + ch <= casefold_table[end - 1].ch) + { + while (TRUE) + { + int half = (start + end) / 2; + if (ch == casefold_table[half].ch) + { + g_string_append (result, casefold_table[half].data); + goto next; + } + else if (half == start) + break; + else if (ch > casefold_table[half].ch) + start = half; + else + end = half; + } + } + + g_string_append_unichar (result, g_unichar_tolower (ch)); + + next: + p = g_utf8_next_char (p); + } + + return g_string_free (result, FALSE); +} + +/** + * g_unichar_get_mirror_char: + * @ch: a Unicode character + * @mirrored_ch: location to store the mirrored character + * + * In Unicode, some characters are <firstterm>mirrored</firstterm>. This + * means that their images are mirrored horizontally in text that is laid + * out from right to left. For instance, "(" would become its mirror image, + * ")", in right-to-left text. + * + * If @ch has the Unicode mirrored property and there is another unicode + * character that typically has a glyph that is the mirror image of @ch's + * glyph and @mirrored_ch is set, it puts that character in the address + * pointed to by @mirrored_ch. Otherwise the original character is put. + * + * Return value: %TRUE if @ch has a mirrored character, %FALSE otherwise + * + * Since: 2.4 + **/ +gboolean +g_unichar_get_mirror_char (gunichar ch, + gunichar *mirrored_ch) +{ + gboolean found; + gunichar mirrored; + + mirrored = GLIB_GET_MIRRORING(ch); + + found = ch != mirrored; + if (mirrored_ch) + *mirrored_ch = mirrored; + + return found; + +} + +#define G_SCRIPT_TABLE_MIDPOINT (G_N_ELEMENTS (g_script_table) / 2) + +static inline GUnicodeScript +g_unichar_get_script_bsearch (gunichar ch) +{ + int lower = 0; + int upper = G_N_ELEMENTS (g_script_table) - 1; + static int saved_mid = G_SCRIPT_TABLE_MIDPOINT; + int mid = saved_mid; + + + do + { + if (ch < g_script_table[mid].start) + upper = mid - 1; + else if (ch >= g_script_table[mid].start + g_script_table[mid].chars) + lower = mid + 1; + else + return g_script_table[saved_mid = mid].script; + + mid = (lower + upper) / 2; + } + while (lower <= upper); + + return G_UNICODE_SCRIPT_UNKNOWN; +} + +/** + * g_unichar_get_script: + * @ch: a Unicode character + * + * Looks up the #GUnicodeScript for a particular character (as defined + * by Unicode Standard Annex #24). No check is made for @ch being a + * valid Unicode character; if you pass in invalid character, the + * result is undefined. + * + * This function is equivalent to pango_script_for_unichar() and the + * two are interchangeable. + * + * Return value: the #GUnicodeScript for the character. + * + * Since: 2.14 + */ +GUnicodeScript +g_unichar_get_script (gunichar ch) +{ + if (ch < G_EASY_SCRIPTS_RANGE) + return g_script_easy_table[ch]; + else + return g_unichar_get_script_bsearch (ch); +} |