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Unified Diff: icu46/source/common/charstr.cpp

Issue 5516007: Check in the pristine copy of ICU 4.6... (Closed) Base URL: svn://chrome-svn/chrome/trunk/deps/third_party/
Patch Set: Created 10 years ago
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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
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