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/*
* Copyright 2010, The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <ctype.h>
#include <string.h>
#include <unicode/ucol.h>
#include <unicode/uiter.h>
#include <unicode/ustring.h>
#include <unicode/utypes.h>
#include "PhonebookIndex.h"
#include "PhoneticStringUtils.h"
#define MIN_OUTPUT_SIZE 6 // Minimum required size for the output buffer (in bytes)
namespace android {
// IMPORTANT! Keep the codes below SORTED. We are doing a binary search on the array
static UChar DEFAULT_CHAR_MAP[] = {
0x00C6, 'A', // AE
0x00DF, 'S', // Etzett
0x1100, 0x3131, // HANGUL LETTER KIYEOK
0x1101, 0x3132, // HANGUL LETTER SSANGKIYEOK
0x1102, 0x3134, // HANGUL LETTER NIEUN
0x1103, 0x3137, // HANGUL LETTER TIKEUT
0x1104, 0x3138, // HANGUL LETTER SSANGTIKEUT
0x1105, 0x3139, // HANGUL LETTER RIEUL
0x1106, 0x3141, // HANGUL LETTER MIEUM
0x1107, 0x3142, // HANGUL LETTER PIEUP
0x1108, 0x3143, // HANGUL LETTER SSANGPIEUP
0x1109, 0x3145, // HANGUL LETTER SIOS
0x110A, 0x3146, // HANGUL LETTER SSANGSIOS
0x110B, 0x3147, // HANGUL LETTER IEUNG
0x110C, 0x3148, // HANGUL LETTER CIEUC
0x110D, 0x3149, // HANGUL LETTER SSANGCIEUC
0x110E, 0x314A, // HANGUL LETTER CHIEUCH
0x110F, 0x314B, // HANGUL LETTER KHIEUKH
0x1110, 0x314C, // HANGUL LETTER THIEUTH
0x1111, 0x314D, // HANGUL LETTER PHIEUPH
0x1112, 0x314E, // HANGUL LETTER HIEUH
0x111A, 0x3140, // HANGUL LETTER RIEUL-HIEUH
0x1121, 0x3144, // HANGUL LETTER PIEUP-SIOS
0x1161, 0x314F, // HANGUL LETTER A
0x1162, 0x3150, // HANGUL LETTER AE
0x1163, 0x3151, // HANGUL LETTER YA
0x1164, 0x3152, // HANGUL LETTER YAE
0x1165, 0x3153, // HANGUL LETTER EO
0x1166, 0x3154, // HANGUL LETTER E
0x1167, 0x3155, // HANGUL LETTER YEO
0x1168, 0x3156, // HANGUL LETTER YE
0x1169, 0x3157, // HANGUL LETTER O
0x116A, 0x3158, // HANGUL LETTER WA
0x116B, 0x3159, // HANGUL LETTER WAE
0x116C, 0x315A, // HANGUL LETTER OE
0x116D, 0x315B, // HANGUL LETTER YO
0x116E, 0x315C, // HANGUL LETTER U
0x116F, 0x315D, // HANGUL LETTER WEO
0x1170, 0x315E, // HANGUL LETTER WE
0x1171, 0x315F, // HANGUL LETTER WI
0x1172, 0x3160, // HANGUL LETTER YU
0x1173, 0x3161, // HANGUL LETTER EU
0x1174, 0x3162, // HANGUL LETTER YI
0x1175, 0x3163, // HANGUL LETTER I
0x11AA, 0x3133, // HANGUL LETTER KIYEOK-SIOS
0x11AC, 0x3135, // HANGUL LETTER NIEUN-CIEUC
0x11AD, 0x3136, // HANGUL LETTER NIEUN-HIEUH
0x11B0, 0x313A, // HANGUL LETTER RIEUL-KIYEOK
0x11B1, 0x313B, // HANGUL LETTER RIEUL-MIEUM
0x11B3, 0x313D, // HANGUL LETTER RIEUL-SIOS
0x11B4, 0x313E, // HANGUL LETTER RIEUL-THIEUTH
0x11B5, 0x313F, // HANGUL LETTER RIEUL-PHIEUPH
};
/**
* Binary search to map an individual character to the corresponding phone book index.
*/
static UChar map_character(UChar c, UChar * char_map, int32_t length) {
int from = 0, to = length;
while (from < to) {
int m = ((to + from) >> 1) & ~0x1; // Only consider even positions
UChar cm = char_map[m];
if (cm == c) {
return char_map[m + 1];
} else if (cm < c) {
from = m + 2;
} else {
to = m;
}
}
return 0;
}
/**
* Returns TRUE if the character belongs to a Hanzi unicode block
*/
static bool is_CJK(UChar c) {
return
(0x4e00 <= c && c <= 0x9fff) // CJK_UNIFIED_IDEOGRAPHS
|| (0x3400 <= c && c <= 0x4dbf) // CJK_UNIFIED_IDEOGRAPHS_EXTENSION_A
|| (0x3000 <= c && c <= 0x303f) // CJK_SYMBOLS_AND_PUNCTUATION
|| (0x2e80 <= c && c <= 0x2eff) // CJK_RADICALS_SUPPLEMENT
|| (0x3300 <= c && c <= 0x33ff) // CJK_COMPATIBILITY
|| (0xfe30 <= c && c <= 0xfe4f) // CJK_COMPATIBILITY_FORMS
|| (0xf900 <= c && c <= 0xfaff); // CJK_COMPATIBILITY_IDEOGRAPHS
}
int32_t GetPhonebookIndex(UCharIterator * iter, const char * locale, UChar * out, int32_t size,
UBool * isError)
{
if (size < MIN_OUTPUT_SIZE) {
*isError = TRUE;
return 0;
}
*isError = FALSE;
// Normalize the first character to remove accents using the NFD normalization
UErrorCode errorCode = U_ZERO_ERROR;
int32_t len = unorm_next(iter, out, size, UNORM_NFD,
0 /* options */, TRUE /* normalize */, NULL, &errorCode);
if (U_FAILURE(errorCode)) {
*isError = TRUE;
return 0;
}
if (len == 0) { // Empty input string
return 0;
}
UChar c = out[0];
if (!u_isalpha(c)) {
// Digits go into a # section. Everything else goes into the empty section
// The unicode function u_isdigit would also identify other characters as digits (arabic),
// but if we caught them here we'd risk having the same section before and after alpha-letters
// which might break the assumption that each section exists only once
if (c >= '0' && c <= '9') {
out[0] = '#';
return 1;
}
return 0;
}
c = u_toupper(c);
// Check for explicitly mapped characters
UChar c_mapped = map_character(c, DEFAULT_CHAR_MAP, sizeof(DEFAULT_CHAR_MAP) / sizeof(UChar));
if (c_mapped != 0) {
out[0] = c_mapped;
return 1;
}
// Convert Kanas to Hiragana
UChar next = len > 2 ? out[1] : 0;
c = android::GetNormalizedCodePoint(c, next, NULL);
// Traditional grouping of Hiragana characters
if (0x3041 <= c && c <= 0x309F) {
if (c < 0x304B) c = 0x3042; // a
else if (c < 0x3055) c = 0x304B; // ka
else if (c < 0x305F) c = 0x3055; // sa
else if (c < 0x306A) c = 0x305F; // ta
else if (c < 0x306F) c = 0x306A; // na
else if (c < 0x307E) c = 0x306F; // ha
else if (c < 0x3083) c = 0x307E; // ma
else if (c < 0x3089) c = 0x3084; // ya
else if (c < 0x308E) c = 0x3089; // ra
else if (c < 0x3094) c = 0x308F; // wa
else return 0; // Others are not readable
out[0] = c;
return 1;
} else if (0x30A0 <= c && c <= 0x30FF) {
// Dot, onbiki, iteration marks are not readable
return 0;
}
if (is_CJK(c)) {
if (strncmp(locale, "ja", 2) == 0) {
// Japanese word meaning "misc" or "other"
out[0] = 0x4ED6;
return 1;
} else {
return 0;
}
}
out[0] = c;
return 1;
}
} // namespace android
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