Index: icu46/source/common/charstr.cpp |
=================================================================== |
--- icu46/source/common/charstr.cpp (revision 0) |
+++ icu46/source/common/charstr.cpp (revision 0) |
@@ -0,0 +1,130 @@ |
+/* |
+******************************************************************************* |
+* Copyright (C) 2010, International Business Machines |
+* Corporation and others. All Rights Reserved. |
+******************************************************************************* |
+* file name: charstr.cpp |
+* encoding: US-ASCII |
+* tab size: 8 (not used) |
+* indentation:4 |
+* |
+* created on: 2010may19 |
+* created by: Markus W. Scherer |
+*/ |
+ |
+#include "unicode/utypes.h" |
+#include "charstr.h" |
+#include "cmemory.h" |
+#include "cstring.h" |
+ |
+U_NAMESPACE_BEGIN |
+ |
+CharString &CharString::copyFrom(const CharString &s, UErrorCode &errorCode) { |
+ if(U_SUCCESS(errorCode) && this!=&s && ensureCapacity(s.len+1, 0, errorCode)) { |
+ len=s.len; |
+ uprv_memcpy(buffer.getAlias(), s.buffer.getAlias(), len+1); |
+ } |
+ return *this; |
+} |
+ |
+CharString &CharString::truncate(int32_t newLength) { |
+ if(newLength<0) { |
+ newLength=0; |
+ } |
+ if(newLength<len) { |
+ buffer[len=newLength]=0; |
+ } |
+ return *this; |
+} |
+ |
+CharString &CharString::append(char c, UErrorCode &errorCode) { |
+ if(ensureCapacity(len+2, 0, errorCode)) { |
+ buffer[len++]=c; |
+ buffer[len]=0; |
+ } |
+ return *this; |
+} |
+ |
+CharString &CharString::append(const char *s, int32_t sLength, UErrorCode &errorCode) { |
+ if(U_FAILURE(errorCode)) { |
+ return *this; |
+ } |
+ if(sLength<-1 || (s==NULL && sLength!=0)) { |
+ errorCode=U_ILLEGAL_ARGUMENT_ERROR; |
+ return *this; |
+ } |
+ if(sLength<0) { |
+ sLength=uprv_strlen(s); |
+ } |
+ if(sLength>0) { |
+ if(s==(buffer.getAlias()+len)) { |
+ // The caller wrote into the getAppendBuffer(). |
+ if(sLength>=(buffer.getCapacity()-len)) { |
+ // The caller wrote too much. |
+ errorCode=U_INTERNAL_PROGRAM_ERROR; |
+ } else { |
+ buffer[len+=sLength]=0; |
+ } |
+ } else if(buffer.getAlias()<=s && s<(buffer.getAlias()+len) && |
+ sLength>=(buffer.getCapacity()-len) |
+ ) { |
+ // (Part of) this string is appended to itself which requires reallocation, |
+ // so we have to make a copy of the substring and append that. |
+ return append(CharString(s, sLength, errorCode), errorCode); |
+ } else if(ensureCapacity(len+sLength+1, 0, errorCode)) { |
+ uprv_memcpy(buffer.getAlias()+len, s, sLength); |
+ buffer[len+=sLength]=0; |
+ } |
+ } |
+ return *this; |
+} |
+ |
+char *CharString::getAppendBuffer(int32_t minCapacity, |
+ int32_t desiredCapacityHint, |
+ int32_t &resultCapacity, |
+ UErrorCode &errorCode) { |
+ if(U_FAILURE(errorCode)) { |
+ resultCapacity=0; |
+ return NULL; |
+ } |
+ int32_t appendCapacity=buffer.getCapacity()-len-1; // -1 for NUL |
+ if(appendCapacity>=minCapacity) { |
+ resultCapacity=appendCapacity; |
+ return buffer.getAlias()+len; |
+ } |
+ if(ensureCapacity(len+minCapacity+1, len+desiredCapacityHint+1, errorCode)) { |
+ resultCapacity=buffer.getCapacity()-len-1; |
+ return buffer.getAlias()+len; |
+ } |
+ resultCapacity=0; |
+ return NULL; |
+} |
+ |
+CharString &CharString::appendInvariantChars(const UnicodeString &s, UErrorCode &errorCode) { |
+ if(ensureCapacity(len+s.length()+1, 0, errorCode)) { |
+ len+=s.extract(0, 0x7fffffff, buffer.getAlias()+len, buffer.getCapacity()-len, US_INV); |
+ } |
+ return *this; |
+} |
+ |
+UBool CharString::ensureCapacity(int32_t capacity, |
+ int32_t desiredCapacityHint, |
+ UErrorCode &errorCode) { |
+ if(U_FAILURE(errorCode)) { |
+ return FALSE; |
+ } |
+ if(capacity>buffer.getCapacity()) { |
+ if(desiredCapacityHint==0) { |
+ desiredCapacityHint=capacity+buffer.getCapacity(); |
+ } |
+ if( (desiredCapacityHint<=capacity || buffer.resize(desiredCapacityHint, len+1)==NULL) && |
+ buffer.resize(capacity, len+1)==NULL |
+ ) { |
+ errorCode=U_MEMORY_ALLOCATION_ERROR; |
+ return FALSE; |
+ } |
+ } |
+ return TRUE; |
+} |
+ |
+U_NAMESPACE_END |
Property changes on: icu46/source/common/charstr.cpp |
___________________________________________________________________ |
Added: svn:eol-style |
+ LF |