projects / apple / icu.git / blame
| Commit | Line | Data |
|---|---|---|
| 729e4ab9 A |
1 | /* |
| 2 | ******************************************************************************* | |
| 3 | * Copyright (C) 2010, 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 | U_NAMESPACE_END |