The Tor Browser / file comparison
comparison: intl/icu/source/common/charstr.cpp
intl/icu/source/common/charstr.cpp
- branch
- TOR_BUG_3246
- changeset 4
- fc2d59ddac77
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| -1:000000000000 | 0:8bb1abdcc80d |
|---|---|
| 1 /* | |
| 2 ******************************************************************************* | |
| 3 * Copyright (C) 2010-2011, International Business Machines | |
| 4 * Corporation and others. All Rights Reserved. | |
| 5 ******************************************************************************* | |
| 6 * file name: charstr.cpp | |
| 7 * encoding: US-ASCII | |
| 8 * tab size: 8 (not used) | |
| 9 * indentation:4 | |
| 10 * | |
| 11 * created on: 2010may19 | |
| 12 * created by: Markus W. Scherer | |
| 13 */ | |
| 14 | |
| 15 #include "unicode/utypes.h" | |
| 16 #include "charstr.h" | |
| 17 #include "cmemory.h" | |
| 18 #include "cstring.h" | |
| 19 | |
| 20 U_NAMESPACE_BEGIN | |
| 21 | |
| 22 CharString &CharString::copyFrom(const CharString &s, UErrorCode &errorCode) { | |
| 23 if(U_SUCCESS(errorCode) && this!=&s && ensureCapacity(s.len+1, 0, errorCode)) { | |
| 24 len=s.len; | |
| 25 uprv_memcpy(buffer.getAlias(), s.buffer.getAlias(), len+1); | |
| 26 } | |
| 27 return *this; | |
| 28 } | |
| 29 | |
| 30 CharString &CharString::truncate(int32_t newLength) { | |
| 31 if(newLength<0) { | |
| 32 newLength=0; | |
| 33 } | |
| 34 if(newLength<len) { | |
| 35 buffer[len=newLength]=0; | |
| 36 } | |
| 37 return *this; | |
| 38 } | |
| 39 | |
| 40 CharString &CharString::append(char c, UErrorCode &errorCode) { | |
| 41 if(ensureCapacity(len+2, 0, errorCode)) { | |
| 42 buffer[len++]=c; | |
| 43 buffer[len]=0; | |
| 44 } | |
| 45 return *this; | |
| 46 } | |
| 47 | |
| 48 CharString &CharString::append(const char *s, int32_t sLength, UErrorCode &errorCode) { | |
| 49 if(U_FAILURE(errorCode)) { | |
| 50 return *this; | |
| 51 } | |
| 52 if(sLength<-1 || (s==NULL && sLength!=0)) { | |
| 53 errorCode=U_ILLEGAL_ARGUMENT_ERROR; | |
| 54 return *this; | |
| 55 } | |
| 56 if(sLength<0) { | |
| 57 sLength=uprv_strlen(s); | |
| 58 } | |
| 59 if(sLength>0) { | |
| 60 if(s==(buffer.getAlias()+len)) { | |
| 61 // The caller wrote into the getAppendBuffer(). | |
| 62 if(sLength>=(buffer.getCapacity()-len)) { | |
| 63 // The caller wrote too much. | |
| 64 errorCode=U_INTERNAL_PROGRAM_ERROR; | |
| 65 } else { | |
| 66 buffer[len+=sLength]=0; | |
| 67 } | |
| 68 } else if(buffer.getAlias()<=s && s<(buffer.getAlias()+len) && | |
| 69 sLength>=(buffer.getCapacity()-len) | |
| 70 ) { | |
| 71 // (Part of) this string is appended to itself which requires reallocation, | |
| 72 // so we have to make a copy of the substring and append that. | |
| 73 return append(CharString(s, sLength, errorCode), errorCode); | |
| 74 } else if(ensureCapacity(len+sLength+1, 0, errorCode)) { | |
| 75 uprv_memcpy(buffer.getAlias()+len, s, sLength); | |
| 76 buffer[len+=sLength]=0; | |
| 77 } | |
| 78 } | |
| 79 return *this; | |
| 80 } | |
| 81 | |
| 82 char *CharString::getAppendBuffer(int32_t minCapacity, | |
| 83 int32_t desiredCapacityHint, | |
| 84 int32_t &resultCapacity, | |
| 85 UErrorCode &errorCode) { | |
| 86 if(U_FAILURE(errorCode)) { | |
| 87 resultCapacity=0; | |
| 88 return NULL; | |
| 89 } | |
| 90 int32_t appendCapacity=buffer.getCapacity()-len-1; // -1 for NUL | |
| 91 if(appendCapacity>=minCapacity) { | |
| 92 resultCapacity=appendCapacity; | |
| 93 return buffer.getAlias()+len; | |
| 94 } | |
| 95 if(ensureCapacity(len+minCapacity+1, len+desiredCapacityHint+1, errorCode)) { | |
| 96 resultCapacity=buffer.getCapacity()-len-1; | |
| 97 return buffer.getAlias()+len; | |
| 98 } | |
| 99 resultCapacity=0; | |
| 100 return NULL; | |
| 101 } | |
| 102 | |
| 103 CharString &CharString::appendInvariantChars(const UnicodeString &s, UErrorCode &errorCode) { | |
| 104 if(ensureCapacity(len+s.length()+1, 0, errorCode)) { | |
| 105 len+=s.extract(0, 0x7fffffff, buffer.getAlias()+len, buffer.getCapacity()-len, US_INV); | |
| 106 } | |
| 107 return *this; | |
| 108 } | |
| 109 | |
| 110 UBool CharString::ensureCapacity(int32_t capacity, | |
| 111 int32_t desiredCapacityHint, | |
| 112 UErrorCode &errorCode) { | |
| 113 if(U_FAILURE(errorCode)) { | |
| 114 return FALSE; | |
| 115 } | |
| 116 if(capacity>buffer.getCapacity()) { | |
| 117 if(desiredCapacityHint==0) { | |
| 118 desiredCapacityHint=capacity+buffer.getCapacity(); | |
| 119 } | |
| 120 if( (desiredCapacityHint<=capacity || buffer.resize(desiredCapacityHint, len+1)==NULL) && | |
| 121 buffer.resize(capacity, len+1)==NULL | |
| 122 ) { | |
| 123 errorCode=U_MEMORY_ALLOCATION_ERROR; | |
| 124 return FALSE; | |
| 125 } | |
| 126 } | |
| 127 return TRUE; | |
| 128 } | |
| 129 | |
| 130 CharString &CharString::appendPathPart(const StringPiece &s, UErrorCode &errorCode) { | |
| 131 if(U_FAILURE(errorCode)) { | |
| 132 return *this; | |
| 133 } | |
| 134 if(s.length()==0) { | |
| 135 return *this; | |
| 136 } | |
| 137 char c; | |
| 138 if(len>0 && (c=buffer[len-1])!=U_FILE_SEP_CHAR && c!=U_FILE_ALT_SEP_CHAR) { | |
| 139 append(U_FILE_SEP_CHAR, errorCode); | |
| 140 } | |
| 141 append(s, errorCode); | |
| 142 return *this; | |
| 143 } | |
| 144 | |
| 145 U_NAMESPACE_END |
