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Diffstat (limited to 'lib/uniname/uniname.c')
-rw-r--r--lib/uniname/uniname.c516
1 files changed, 516 insertions, 0 deletions
diff --git a/lib/uniname/uniname.c b/lib/uniname/uniname.c
new file mode 100644
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--- /dev/null
+++ b/lib/uniname/uniname.c
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+/* Association between Unicode characters and their names.
+ Copyright (C) 2000-2002, 2005-2007, 2009 Free Software Foundation, Inc.
+
+ This program 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 3 of the License, or
+ (at your option) any later version.
+
+ This program 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 program. If not, see <http://www.gnu.org/licenses/>. */
+
+#include <config.h>
+
+/* Specification. */
+#include "uniname.h"
+
+#include <assert.h>
+#include <stdbool.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <string.h>
+
+#define SIZEOF(a) (sizeof(a) / sizeof(a[0]))
+
+
+/* Table of Unicode character names, derived from UnicodeData.txt.
+ This table is generated in a way to minimize the memory footprint:
+ 1. its compiled size is small (less than 350 KB),
+ 2. it resides entirely in the text or read-only data segment of the
+ executable or shared library: the table contains only immediate
+ integers, no pointers, and the functions don't do heap allocation.
+ */
+#include "uninames.h"
+/* It contains:
+ static const char unicode_name_words[36303] = ...;
+ #define UNICODE_CHARNAME_NUM_WORDS 6260
+ static const struct { uint16_t extra_offset; uint16_t ind_offset; } unicode_name_by_length[26] = ...;
+ #define UNICODE_CHARNAME_WORD_HANGUL 3902
+ #define UNICODE_CHARNAME_WORD_SYLLABLE 4978
+ #define UNICODE_CHARNAME_WORD_CJK 417
+ #define UNICODE_CHARNAME_WORD_COMPATIBILITY 6107
+ static const uint16_t unicode_names[68940] = ...;
+ static const struct { uint16_t code; uint32_t name:24; } unicode_name_to_code[16626] = ...;
+ static const struct { uint16_t code; uint32_t name:24; } unicode_code_to_name[16626] = ...;
+ #define UNICODE_CHARNAME_MAX_LENGTH 83
+ #define UNICODE_CHARNAME_MAX_WORDS 13
+*/
+
+/* Returns the word with a given index. */
+static const char *
+unicode_name_word (unsigned int index, unsigned int *lengthp)
+{
+ unsigned int i1;
+ unsigned int i2;
+ unsigned int i;
+
+ assert (index < UNICODE_CHARNAME_NUM_WORDS);
+
+ /* Binary search for i with
+ unicode_name_by_length[i].ind_offset <= index
+ and
+ index < unicode_name_by_length[i+1].ind_offset
+ */
+
+ i1 = 0;
+ i2 = SIZEOF (unicode_name_by_length) - 1;
+ while (i2 - i1 > 1)
+ {
+ unsigned int i = (i1 + i2) >> 1;
+ if (unicode_name_by_length[i].ind_offset <= index)
+ i1 = i;
+ else
+ i2 = i;
+ }
+ i = i1;
+ assert (unicode_name_by_length[i].ind_offset <= index
+ && index < unicode_name_by_length[i+1].ind_offset);
+ *lengthp = i;
+ return &unicode_name_words[unicode_name_by_length[i].extra_offset
+ + (index-unicode_name_by_length[i].ind_offset)*i];
+}
+
+/* Looks up the index of a word. */
+static int
+unicode_name_word_lookup (const char *word, unsigned int length)
+{
+ if (length > 0 && length < SIZEOF (unicode_name_by_length) - 1)
+ {
+ /* Binary search among the words of given length. */
+ unsigned int extra_offset = unicode_name_by_length[length].extra_offset;
+ unsigned int i0 = unicode_name_by_length[length].ind_offset;
+ unsigned int i1 = i0;
+ unsigned int i2 = unicode_name_by_length[length+1].ind_offset;
+ while (i2 - i1 > 0)
+ {
+ unsigned int i = (i1 + i2) >> 1;
+ const char *p = &unicode_name_words[extra_offset + (i-i0)*length];
+ const char *w = word;
+ unsigned int n = length;
+ for (;;)
+ {
+ if (*p < *w)
+ {
+ if (i1 == i)
+ return -1;
+ /* Note here: i1 < i < i2. */
+ i1 = i;
+ break;
+ }
+ if (*p > *w)
+ {
+ /* Note here: i1 <= i < i2. */
+ i2 = i;
+ break;
+ }
+ p++; w++; n--;
+ if (n == 0)
+ return i;
+ }
+ }
+ }
+ return -1;
+}
+
+/* Auxiliary tables for Hangul syllable names, see the Unicode 3.0 book,
+ sections 3.11 and 4.4. */
+static const char jamo_initial_short_name[19][3] =
+{
+ "G", "GG", "N", "D", "DD", "R", "M", "B", "BB", "S", "SS", "", "J", "JJ",
+ "C", "K", "T", "P", "H"
+};
+static const char jamo_medial_short_name[21][4] =
+{
+ "A", "AE", "YA", "YAE", "EO", "E", "YEO", "YE", "O", "WA", "WAE", "OE", "YO",
+ "U", "WEO", "WE", "WI", "YU", "EU", "YI", "I"
+};
+static const char jamo_final_short_name[28][3] =
+{
+ "", "G", "GG", "GS", "N", "NI", "NH", "D", "L", "LG", "LM", "LB", "LS", "LT",
+ "LP", "LH", "M", "B", "BS", "S", "SS", "NG", "J", "C", "K", "T", "P", "H"
+};
+
+/* Looks up the name of a Unicode character, in uppercase ASCII.
+ Returns the filled buf, or NULL if the character does not have a name. */
+char *
+unicode_character_name (ucs4_t c, char *buf)
+{
+ if (c >= 0xAC00 && c <= 0xD7A3)
+ {
+ /* Special case for Hangul syllables. Keeps the tables small. */
+ char *ptr;
+ unsigned int tmp;
+ unsigned int index1;
+ unsigned int index2;
+ unsigned int index3;
+ const char *q;
+
+ /* buf needs to have at least 16 + 7 bytes here. */
+ memcpy (buf, "HANGUL SYLLABLE ", 16);
+ ptr = buf + 16;
+
+ tmp = c - 0xAC00;
+ index3 = tmp % 28; tmp = tmp / 28;
+ index2 = tmp % 21; tmp = tmp / 21;
+ index1 = tmp;
+
+ q = jamo_initial_short_name[index1];
+ while (*q != '\0')
+ *ptr++ = *q++;
+ q = jamo_medial_short_name[index2];
+ while (*q != '\0')
+ *ptr++ = *q++;
+ q = jamo_final_short_name[index3];
+ while (*q != '\0')
+ *ptr++ = *q++;
+ *ptr = '\0';
+ return buf;
+ }
+ else if ((c >= 0xF900 && c <= 0xFA2D) || (c >= 0xFA30 && c <= 0xFA6A)
+ || (c >= 0xFA70 && c <= 0xFAD9) || (c >= 0x2F800 && c <= 0x2FA1D))
+ {
+ /* Special case for CJK compatibility ideographs. Keeps the tables
+ small. */
+ char *ptr;
+ int i;
+
+ /* buf needs to have at least 28 + 5 bytes here. */
+ memcpy (buf, "CJK COMPATIBILITY IDEOGRAPH-", 28);
+ ptr = buf + 28;
+
+ for (i = (c < 0x10000 ? 12 : 16); i >= 0; i -= 4)
+ {
+ unsigned int x = (c >> i) & 0xf;
+ *ptr++ = (x < 10 ? '0' : 'A' - 10) + x;
+ }
+ *ptr = '\0';
+ return buf;
+ }
+ else
+ {
+ const uint16_t *words;
+
+ /* Transform the code so that it fits in 16 bits. */
+ switch (c >> 12)
+ {
+ case 0x00: case 0x01: case 0x02: case 0x03: case 0x04:
+ break;
+ case 0x0A:
+ c -= 0x05000;
+ break;
+ case 0x0F:
+ c -= 0x09000;
+ break;
+ case 0x10:
+ c -= 0x09000;
+ break;
+ case 0x12:
+ c -= 0x0A000;
+ break;
+ case 0x1D:
+ c -= 0x14000;
+ break;
+ case 0x1F:
+ c -= 0x15000;
+ break;
+ case 0x2F:
+ c -= 0x24000;
+ break;
+ case 0xE0:
+ c -= 0xD4000;
+ break;
+ default:
+ return NULL;
+ }
+
+ {
+ /* Binary search in unicode_code_to_name. */
+ unsigned int i1 = 0;
+ unsigned int i2 = SIZEOF (unicode_code_to_name);
+ for (;;)
+ {
+ unsigned int i = (i1 + i2) >> 1;
+ if (unicode_code_to_name[i].code == c)
+ {
+ words = &unicode_names[unicode_code_to_name[i].name];
+ break;
+ }
+ else if (unicode_code_to_name[i].code < c)
+ {
+ if (i1 == i)
+ {
+ words = NULL;
+ break;
+ }
+ /* Note here: i1 < i < i2. */
+ i1 = i;
+ }
+ else if (unicode_code_to_name[i].code > c)
+ {
+ if (i2 == i)
+ {
+ words = NULL;
+ break;
+ }
+ /* Note here: i1 <= i < i2. */
+ i2 = i;
+ }
+ }
+ }
+ if (words != NULL)
+ {
+ /* Found it in unicode_code_to_name. Now concatenate the words. */
+ /* buf needs to have at least UNICODE_CHARNAME_MAX_LENGTH bytes. */
+ char *ptr = buf;
+ for (;;)
+ {
+ unsigned int wordlen;
+ const char *word = unicode_name_word (*words>>1, &wordlen);
+ do
+ *ptr++ = *word++;
+ while (--wordlen > 0);
+ if ((*words & 1) == 0)
+ break;
+ *ptr++ = ' ';
+ words++;
+ }
+ *ptr = '\0';
+ return buf;
+ }
+ return NULL;
+ }
+}
+
+/* Looks up the Unicode character with a given name, in upper- or lowercase
+ ASCII. Returns the character if found, or UNINAME_INVALID if not found. */
+ucs4_t
+unicode_name_character (const char *name)
+{
+ unsigned int len = strlen (name);
+ if (len > 1 && len <= UNICODE_CHARNAME_MAX_LENGTH)
+ {
+ /* Test for "word1 word2 ..." syntax. */
+ char buf[UNICODE_CHARNAME_MAX_LENGTH];
+ char *ptr = buf;
+ for (;;)
+ {
+ char c = *name++;
+ if (!(c >= ' ' && c <= '~'))
+ break;
+ *ptr++ = (c >= 'a' && c <= 'z' ? c - 'a' + 'A' : c);
+ if (--len == 0)
+ goto filled_buf;
+ }
+ if (false)
+ filled_buf:
+ {
+ /* Convert the constituents to uint16_t words. */
+ uint16_t words[UNICODE_CHARNAME_MAX_WORDS];
+ uint16_t *wordptr = words;
+ {
+ const char *p1 = buf;
+ for (;;)
+ {
+ {
+ int word;
+ const char *p2 = p1;
+ while (p2 < ptr && *p2 != ' ')
+ p2++;
+ word = unicode_name_word_lookup (p1, p2 - p1);
+ if (word < 0)
+ break;
+ if (wordptr == &words[UNICODE_CHARNAME_MAX_WORDS])
+ break;
+ *wordptr++ = word;
+ if (p2 == ptr)
+ goto filled_words;
+ p1 = p2 + 1;
+ }
+ /* Special case for Hangul syllables. Keeps the tables small. */
+ if (wordptr == &words[2]
+ && words[0] == UNICODE_CHARNAME_WORD_HANGUL
+ && words[1] == UNICODE_CHARNAME_WORD_SYLLABLE)
+ {
+ /* Split the last word [p1..ptr) into three parts:
+ 1) [BCDGHJKMNPRST]
+ 2) [AEIOUWY]
+ 3) [BCDGHIJKLMNPST]
+ */
+ const char *p2;
+ const char *p3;
+ const char *p4;
+
+ p2 = p1;
+ while (p2 < ptr
+ && (*p2 == 'B' || *p2 == 'C' || *p2 == 'D'
+ || *p2 == 'G' || *p2 == 'H' || *p2 == 'J'
+ || *p2 == 'K' || *p2 == 'M' || *p2 == 'N'
+ || *p2 == 'P' || *p2 == 'R' || *p2 == 'S'
+ || *p2 == 'T'))
+ p2++;
+ p3 = p2;
+ while (p3 < ptr
+ && (*p3 == 'A' || *p3 == 'E' || *p3 == 'I'
+ || *p3 == 'O' || *p3 == 'U' || *p3 == 'W'
+ || *p3 == 'Y'))
+ p3++;
+ p4 = p3;
+ while (p4 < ptr
+ && (*p4 == 'B' || *p4 == 'C' || *p4 == 'D'
+ || *p4 == 'G' || *p4 == 'H' || *p4 == 'I'
+ || *p4 == 'J' || *p4 == 'K' || *p4 == 'L'
+ || *p4 == 'M' || *p4 == 'N' || *p4 == 'P'
+ || *p4 == 'S' || *p4 == 'T'))
+ p4++;
+ if (p4 == ptr)
+ {
+ unsigned int n1 = p2 - p1;
+ unsigned int n2 = p3 - p2;
+ unsigned int n3 = p4 - p3;
+
+ if (n1 <= 2 && (n2 >= 1 && n2 <= 3) && n3 <= 2)
+ {
+ unsigned int index1;
+
+ for (index1 = 0; index1 < 19; index1++)
+ if (memcmp(jamo_initial_short_name[index1], p1, n1) == 0
+ && jamo_initial_short_name[index1][n1] == '\0')
+ {
+ unsigned int index2;
+
+ for (index2 = 0; index2 < 21; index2++)
+ if (memcmp(jamo_medial_short_name[index2], p2, n2) == 0
+ && jamo_medial_short_name[index2][n2] == '\0')
+ {
+ unsigned int index3;
+
+ for (index3 = 0; index3 < 28; index3++)
+ if (memcmp(jamo_final_short_name[index3], p3, n3) == 0
+ && jamo_final_short_name[index3][n3] == '\0')
+ {
+ return 0xAC00 + (index1 * 21 + index2) * 28 + index3;
+ }
+ break;
+ }
+ break;
+ }
+ }
+ }
+ }
+ /* Special case for CJK compatibility ideographs. Keeps the
+ tables small. */
+ if (wordptr == &words[2]
+ && words[0] == UNICODE_CHARNAME_WORD_CJK
+ && words[1] == UNICODE_CHARNAME_WORD_COMPATIBILITY
+ && p1 + 14 <= ptr
+ && p1 + 15 >= ptr
+ && memcmp (p1, "IDEOGRAPH-", 10) == 0)
+ {
+ const char *p2 = p1 + 10;
+
+ if (*p2 != '0')
+ {
+ unsigned int c = 0;
+
+ for (;;)
+ {
+ if (*p2 >= '0' && *p2 <= '9')
+ c += (*p2 - '0');
+ else if (*p2 >= 'A' && *p2 <= 'F')
+ c += (*p2 - 'A' + 10);
+ else
+ break;
+ p2++;
+ if (p2 == ptr)
+ {
+ if ((c >= 0xF900 && c <= 0xFA2D)
+ || (c >= 0xFA30 && c <= 0xFA6A)
+ || (c >= 0xFA70 && c <= 0xFAD9)
+ || (c >= 0x2F800 && c <= 0x2FA1D))
+ return c;
+ else
+ break;
+ }
+ c = c << 4;
+ }
+ }
+ }
+ }
+ }
+ if (false)
+ filled_words:
+ {
+ /* Multiply by 2, to simplify later comparisons. */
+ unsigned int words_length = wordptr - words;
+ {
+ int i = words_length - 1;
+ words[i] = 2 * words[i];
+ for (; --i >= 0; )
+ words[i] = 2 * words[i] + 1;
+ }
+ /* Binary search in unicode_name_to_code. */
+ {
+ unsigned int i1 = 0;
+ unsigned int i2 = SIZEOF (unicode_name_to_code);
+ for (;;)
+ {
+ unsigned int i = (i1 + i2) >> 1;
+ const uint16_t *w = words;
+ const uint16_t *p = &unicode_names[unicode_name_to_code[i].name];
+ unsigned int n = words_length;
+ for (;;)
+ {
+ if (*p < *w)
+ {
+ if (i1 == i)
+ goto name_not_found;
+ /* Note here: i1 < i < i2. */
+ i1 = i;
+ break;
+ }
+ else if (*p > *w)
+ {
+ if (i2 == i)
+ goto name_not_found;
+ /* Note here: i1 <= i < i2. */
+ i2 = i;
+ break;
+ }
+ p++; w++; n--;
+ if (n == 0)
+ {
+ unsigned int c = unicode_name_to_code[i].code;
+
+ /* Undo the transformation to 16-bit space. */
+ static const unsigned int offset[13] =
+ {
+ 0x00000, 0x00000, 0x00000, 0x00000, 0x00000,
+ 0x05000, 0x09000, 0x09000, 0x0A000, 0x14000,
+ 0x15000, 0x24000, 0xD4000
+ };
+ return c + offset[c >> 12];
+ }
+ }
+ }
+ }
+ name_not_found: ;
+ }
+ }
+ }
+ return UNINAME_INVALID;
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-26 07:19:37 +0000