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comparison: intl/icu/source/common/ustr_cnv.c
intl/icu/source/common/ustr_cnv.c
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- TOR_BUG_3246
- changeset 4
- fc2d59ddac77
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| -1:000000000000 | 0:5941584ca5c0 |
|---|---|
| 1 /* | |
| 2 ******************************************************************************* | |
| 3 * | |
| 4 * Copyright (C) 1998-2013, International Business Machines | |
| 5 * Corporation and others. All Rights Reserved. | |
| 6 * | |
| 7 ******************************************************************************* | |
| 8 * file name: ustr_cnv.c | |
| 9 * encoding: US-ASCII | |
| 10 * tab size: 8 (not used) | |
| 11 * indentation:4 | |
| 12 * | |
| 13 * created on: 2004aug24 | |
| 14 * created by: Markus W. Scherer | |
| 15 * | |
| 16 * Character conversion functions moved here from ustring.c | |
| 17 */ | |
| 18 | |
| 19 #include "unicode/utypes.h" | |
| 20 | |
| 21 #if !UCONFIG_NO_CONVERSION | |
| 22 | |
| 23 #include "unicode/ustring.h" | |
| 24 #include "unicode/ucnv.h" | |
| 25 #include "cstring.h" | |
| 26 #include "cmemory.h" | |
| 27 #include "cmutex.h" | |
| 28 #include "ustr_cnv.h" | |
| 29 | |
| 30 /* mutexed access to a shared default converter ----------------------------- */ | |
| 31 | |
| 32 static UConverter *gDefaultConverter = NULL; | |
| 33 | |
| 34 U_CAPI UConverter* U_EXPORT2 | |
| 35 u_getDefaultConverter(UErrorCode *status) | |
| 36 { | |
| 37 UConverter *converter = NULL; | |
| 38 | |
| 39 if (gDefaultConverter != NULL) { | |
| 40 umtx_lock(NULL); | |
| 41 | |
| 42 /* need to check to make sure it wasn't taken out from under us */ | |
| 43 if (gDefaultConverter != NULL) { | |
| 44 converter = gDefaultConverter; | |
| 45 gDefaultConverter = NULL; | |
| 46 } | |
| 47 umtx_unlock(NULL); | |
| 48 } | |
| 49 | |
| 50 /* if the cache was empty, create a converter */ | |
| 51 if(converter == NULL) { | |
| 52 converter = ucnv_open(NULL, status); | |
| 53 if(U_FAILURE(*status)) { | |
| 54 ucnv_close(converter); | |
| 55 converter = NULL; | |
| 56 } | |
| 57 } | |
| 58 | |
| 59 return converter; | |
| 60 } | |
| 61 | |
| 62 U_CAPI void U_EXPORT2 | |
| 63 u_releaseDefaultConverter(UConverter *converter) | |
| 64 { | |
| 65 if(gDefaultConverter == NULL) { | |
| 66 if (converter != NULL) { | |
| 67 ucnv_reset(converter); | |
| 68 } | |
| 69 umtx_lock(NULL); | |
| 70 | |
| 71 if(gDefaultConverter == NULL) { | |
| 72 gDefaultConverter = converter; | |
| 73 converter = NULL; | |
| 74 } | |
| 75 umtx_unlock(NULL); | |
| 76 } | |
| 77 | |
| 78 if(converter != NULL) { | |
| 79 ucnv_close(converter); | |
| 80 } | |
| 81 } | |
| 82 | |
| 83 U_CAPI void U_EXPORT2 | |
| 84 u_flushDefaultConverter() | |
| 85 { | |
| 86 UConverter *converter = NULL; | |
| 87 | |
| 88 if (gDefaultConverter != NULL) { | |
| 89 umtx_lock(NULL); | |
| 90 | |
| 91 /* need to check to make sure it wasn't taken out from under us */ | |
| 92 if (gDefaultConverter != NULL) { | |
| 93 converter = gDefaultConverter; | |
| 94 gDefaultConverter = NULL; | |
| 95 } | |
| 96 umtx_unlock(NULL); | |
| 97 } | |
| 98 | |
| 99 /* if the cache was populated, flush it */ | |
| 100 if(converter != NULL) { | |
| 101 ucnv_close(converter); | |
| 102 } | |
| 103 } | |
| 104 | |
| 105 | |
| 106 /* conversions between char* and UChar* ------------------------------------- */ | |
| 107 | |
| 108 /* maximum string length for u_uastrcpy() and u_austrcpy() implementations */ | |
| 109 #define MAX_STRLEN 0x0FFFFFFF | |
| 110 | |
| 111 /* | |
| 112 returns the minimum of (the length of the null-terminated string) and n. | |
| 113 */ | |
| 114 static int32_t u_astrnlen(const char *s1, int32_t n) | |
| 115 { | |
| 116 int32_t len = 0; | |
| 117 | |
| 118 if (s1) | |
| 119 { | |
| 120 while (n-- && *(s1++)) | |
| 121 { | |
| 122 len++; | |
| 123 } | |
| 124 } | |
| 125 return len; | |
| 126 } | |
| 127 | |
| 128 U_CAPI UChar* U_EXPORT2 | |
| 129 u_uastrncpy(UChar *ucs1, | |
| 130 const char *s2, | |
| 131 int32_t n) | |
| 132 { | |
| 133 UChar *target = ucs1; | |
| 134 UErrorCode err = U_ZERO_ERROR; | |
| 135 UConverter *cnv = u_getDefaultConverter(&err); | |
| 136 if(U_SUCCESS(err) && cnv != NULL) { | |
| 137 ucnv_reset(cnv); | |
| 138 ucnv_toUnicode(cnv, | |
| 139 &target, | |
| 140 ucs1+n, | |
| 141 &s2, | |
| 142 s2+u_astrnlen(s2, n), | |
| 143 NULL, | |
| 144 TRUE, | |
| 145 &err); | |
| 146 ucnv_reset(cnv); /* be good citizens */ | |
| 147 u_releaseDefaultConverter(cnv); | |
| 148 if(U_FAILURE(err) && (err != U_BUFFER_OVERFLOW_ERROR) ) { | |
| 149 *ucs1 = 0; /* failure */ | |
| 150 } | |
| 151 if(target < (ucs1+n)) { /* U_BUFFER_OVERFLOW_ERROR isn't an err, just means no termination will happen. */ | |
| 152 *target = 0; /* terminate */ | |
| 153 } | |
| 154 } else { | |
| 155 *ucs1 = 0; | |
| 156 } | |
| 157 return ucs1; | |
| 158 } | |
| 159 | |
| 160 U_CAPI UChar* U_EXPORT2 | |
| 161 u_uastrcpy(UChar *ucs1, | |
| 162 const char *s2 ) | |
| 163 { | |
| 164 UErrorCode err = U_ZERO_ERROR; | |
| 165 UConverter *cnv = u_getDefaultConverter(&err); | |
| 166 if(U_SUCCESS(err) && cnv != NULL) { | |
| 167 ucnv_toUChars(cnv, | |
| 168 ucs1, | |
| 169 MAX_STRLEN, | |
| 170 s2, | |
| 171 (int32_t)uprv_strlen(s2), | |
| 172 &err); | |
| 173 u_releaseDefaultConverter(cnv); | |
| 174 if(U_FAILURE(err)) { | |
| 175 *ucs1 = 0; | |
| 176 } | |
| 177 } else { | |
| 178 *ucs1 = 0; | |
| 179 } | |
| 180 return ucs1; | |
| 181 } | |
| 182 | |
| 183 /* | |
| 184 returns the minimum of (the length of the null-terminated string) and n. | |
| 185 */ | |
| 186 static int32_t u_ustrnlen(const UChar *ucs1, int32_t n) | |
| 187 { | |
| 188 int32_t len = 0; | |
| 189 | |
| 190 if (ucs1) | |
| 191 { | |
| 192 while (n-- && *(ucs1++)) | |
| 193 { | |
| 194 len++; | |
| 195 } | |
| 196 } | |
| 197 return len; | |
| 198 } | |
| 199 | |
| 200 U_CAPI char* U_EXPORT2 | |
| 201 u_austrncpy(char *s1, | |
| 202 const UChar *ucs2, | |
| 203 int32_t n) | |
| 204 { | |
| 205 char *target = s1; | |
| 206 UErrorCode err = U_ZERO_ERROR; | |
| 207 UConverter *cnv = u_getDefaultConverter(&err); | |
| 208 if(U_SUCCESS(err) && cnv != NULL) { | |
| 209 ucnv_reset(cnv); | |
| 210 ucnv_fromUnicode(cnv, | |
| 211 &target, | |
| 212 s1+n, | |
| 213 &ucs2, | |
| 214 ucs2+u_ustrnlen(ucs2, n), | |
| 215 NULL, | |
| 216 TRUE, | |
| 217 &err); | |
| 218 ucnv_reset(cnv); /* be good citizens */ | |
| 219 u_releaseDefaultConverter(cnv); | |
| 220 if(U_FAILURE(err) && (err != U_BUFFER_OVERFLOW_ERROR) ) { | |
| 221 *s1 = 0; /* failure */ | |
| 222 } | |
| 223 if(target < (s1+n)) { /* U_BUFFER_OVERFLOW_ERROR isn't an err, just means no termination will happen. */ | |
| 224 *target = 0; /* terminate */ | |
| 225 } | |
| 226 } else { | |
| 227 *s1 = 0; | |
| 228 } | |
| 229 return s1; | |
| 230 } | |
| 231 | |
| 232 U_CAPI char* U_EXPORT2 | |
| 233 u_austrcpy(char *s1, | |
| 234 const UChar *ucs2 ) | |
| 235 { | |
| 236 UErrorCode err = U_ZERO_ERROR; | |
| 237 UConverter *cnv = u_getDefaultConverter(&err); | |
| 238 if(U_SUCCESS(err) && cnv != NULL) { | |
| 239 int32_t len = ucnv_fromUChars(cnv, | |
| 240 s1, | |
| 241 MAX_STRLEN, | |
| 242 ucs2, | |
| 243 -1, | |
| 244 &err); | |
| 245 u_releaseDefaultConverter(cnv); | |
| 246 s1[len] = 0; | |
| 247 } else { | |
| 248 *s1 = 0; | |
| 249 } | |
| 250 return s1; | |
| 251 } | |
| 252 | |
| 253 #endif |
