1 /* 2 * Copyright 2010, The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #include <ctype.h> 18 #include <string.h> 19 20 #include <unicode/ucol.h> 21 #include <unicode/uiter.h> 22 #include <unicode/ustring.h> 23 #include <unicode/utypes.h> 24 25 #include "PhonebookIndex.h" 26 #include "PhoneticStringUtils.h" 27 28 #define MIN_OUTPUT_SIZE 6 // Minimum required size for the output buffer (in bytes) 29 30 namespace android { 31 32 // IMPORTANT! Keep the codes below SORTED. We are doing a binary search on the array 33 static UChar DEFAULT_CHAR_MAP[] = { 34 0x00C6, 'A', // AE 35 0x00DF, 'S', // Etzett 36 0x1100, 0x3131, // HANGUL LETTER KIYEOK 37 0x1101, 0x3132, // HANGUL LETTER SSANGKIYEOK 38 0x1102, 0x3134, // HANGUL LETTER NIEUN 39 0x1103, 0x3137, // HANGUL LETTER TIKEUT 40 0x1104, 0x3138, // HANGUL LETTER SSANGTIKEUT 41 0x1105, 0x3139, // HANGUL LETTER RIEUL 42 0x1106, 0x3141, // HANGUL LETTER MIEUM 43 0x1107, 0x3142, // HANGUL LETTER PIEUP 44 0x1108, 0x3143, // HANGUL LETTER SSANGPIEUP 45 0x1109, 0x3145, // HANGUL LETTER SIOS 46 0x110A, 0x3146, // HANGUL LETTER SSANGSIOS 47 0x110B, 0x3147, // HANGUL LETTER IEUNG 48 0x110C, 0x3148, // HANGUL LETTER CIEUC 49 0x110D, 0x3149, // HANGUL LETTER SSANGCIEUC 50 0x110E, 0x314A, // HANGUL LETTER CHIEUCH 51 0x110F, 0x314B, // HANGUL LETTER KHIEUKH 52 0x1110, 0x314C, // HANGUL LETTER THIEUTH 53 0x1111, 0x314D, // HANGUL LETTER PHIEUPH 54 0x1112, 0x314E, // HANGUL LETTER HIEUH 55 0x111A, 0x3140, // HANGUL LETTER RIEUL-HIEUH 56 0x1121, 0x3144, // HANGUL LETTER PIEUP-SIOS 57 0x1161, 0x314F, // HANGUL LETTER A 58 0x1162, 0x3150, // HANGUL LETTER AE 59 0x1163, 0x3151, // HANGUL LETTER YA 60 0x1164, 0x3152, // HANGUL LETTER YAE 61 0x1165, 0x3153, // HANGUL LETTER EO 62 0x1166, 0x3154, // HANGUL LETTER E 63 0x1167, 0x3155, // HANGUL LETTER YEO 64 0x1168, 0x3156, // HANGUL LETTER YE 65 0x1169, 0x3157, // HANGUL LETTER O 66 0x116A, 0x3158, // HANGUL LETTER WA 67 0x116B, 0x3159, // HANGUL LETTER WAE 68 0x116C, 0x315A, // HANGUL LETTER OE 69 0x116D, 0x315B, // HANGUL LETTER YO 70 0x116E, 0x315C, // HANGUL LETTER U 71 0x116F, 0x315D, // HANGUL LETTER WEO 72 0x1170, 0x315E, // HANGUL LETTER WE 73 0x1171, 0x315F, // HANGUL LETTER WI 74 0x1172, 0x3160, // HANGUL LETTER YU 75 0x1173, 0x3161, // HANGUL LETTER EU 76 0x1174, 0x3162, // HANGUL LETTER YI 77 0x1175, 0x3163, // HANGUL LETTER I 78 0x11AA, 0x3133, // HANGUL LETTER KIYEOK-SIOS 79 0x11AC, 0x3135, // HANGUL LETTER NIEUN-CIEUC 80 0x11AD, 0x3136, // HANGUL LETTER NIEUN-HIEUH 81 0x11B0, 0x313A, // HANGUL LETTER RIEUL-KIYEOK 82 0x11B1, 0x313B, // HANGUL LETTER RIEUL-MIEUM 83 0x11B3, 0x313D, // HANGUL LETTER RIEUL-SIOS 84 0x11B4, 0x313E, // HANGUL LETTER RIEUL-THIEUTH 85 0x11B5, 0x313F, // HANGUL LETTER RIEUL-PHIEUPH 86 }; 87 88 /** 89 * Binary search to map an individual character to the corresponding phone book index. 90 */ 91 static UChar map_character(UChar c, UChar * char_map, int32_t length) { 92 int from = 0, to = length; 93 while (from < to) { 94 int m = ((to + from) >> 1) & ~0x1; // Only consider even positions 95 UChar cm = char_map[m]; 96 if (cm == c) { 97 return char_map[m + 1]; 98 } else if (cm < c) { 99 from = m + 2; 100 } else { 101 to = m; 102 } 103 } 104 return 0; 105 } 106 107 /** 108 * Returns TRUE if the character belongs to a Hanzi unicode block 109 */ 110 static bool is_CJK(UChar c) { 111 return 112 (0x4e00 <= c && c <= 0x9fff) // CJK_UNIFIED_IDEOGRAPHS 113 || (0x3400 <= c && c <= 0x4dbf) // CJK_UNIFIED_IDEOGRAPHS_EXTENSION_A 114 || (0x3000 <= c && c <= 0x303f) // CJK_SYMBOLS_AND_PUNCTUATION 115 || (0x2e80 <= c && c <= 0x2eff) // CJK_RADICALS_SUPPLEMENT 116 || (0x3300 <= c && c <= 0x33ff) // CJK_COMPATIBILITY 117 || (0xfe30 <= c && c <= 0xfe4f) // CJK_COMPATIBILITY_FORMS 118 || (0xf900 <= c && c <= 0xfaff); // CJK_COMPATIBILITY_IDEOGRAPHS 119 } 120 121 int32_t GetPhonebookIndex(UCharIterator * iter, const char * locale, UChar * out, int32_t size, 122 UBool * isError) 123 { 124 if (size < MIN_OUTPUT_SIZE) { 125 *isError = TRUE; 126 return 0; 127 } 128 129 *isError = FALSE; 130 131 // Normalize the first character to remove accents using the NFD normalization 132 UErrorCode errorCode = U_ZERO_ERROR; 133 int32_t len = unorm_next(iter, out, size, UNORM_NFD, 134 0 /* options */, TRUE /* normalize */, NULL, &errorCode); 135 if (U_FAILURE(errorCode)) { 136 *isError = TRUE; 137 return 0; 138 } 139 140 if (len == 0) { // Empty input string 141 return 0; 142 } 143 144 UChar c = out[0]; 145 146 // We are only interested in letters 147 if (!u_isalpha(c)) { 148 return 0; 149 } 150 151 c = u_toupper(c); 152 153 // Check for explicitly mapped characters 154 UChar c_mapped = map_character(c, DEFAULT_CHAR_MAP, sizeof(DEFAULT_CHAR_MAP) / sizeof(UChar)); 155 if (c_mapped != 0) { 156 out[0] = c_mapped; 157 return 1; 158 } 159 160 // Convert Kanas to Hiragana 161 UChar next = len > 2 ? out[1] : 0; 162 c = android::GetNormalizedCodePoint(c, next, NULL); 163 164 // Traditional grouping of Hiragana characters 165 if (0x3042 <= c && c <= 0x309F) { 166 if (c < 0x304B) c = 0x3042; // a 167 else if (c < 0x3055) c = 0x304B; // ka 168 else if (c < 0x305F) c = 0x3055; // sa 169 else if (c < 0x306A) c = 0x305F; // ta 170 else if (c < 0x306F) c = 0x306A; // na 171 else if (c < 0x307E) c = 0x306F; // ha 172 else if (c < 0x3084) c = 0x307E; // ma 173 else if (c < 0x3089) c = 0x3084; // ya 174 else if (c < 0x308F) c = 0x3089; // ra 175 else c = 0x308F; // wa 176 out[0] = c; 177 return 1; 178 } 179 180 if (is_CJK(c)) { 181 if (strncmp(locale, "ja", 2) == 0) { 182 // Japanese word meaning "misc" or "other" 183 out[0] = 0x4ED6; 184 return 1; 185 } else { 186 return 0; 187 } 188 } 189 190 out[0] = c; 191 return 1; 192 } 193 194 } // namespace android 195
