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// © 2016 and later: Unicode, Inc. and others.
// License & terms of use: http://www.unicode.org/copyright.html
/*
*******************************************************************************
* Copyright (C) 2010-2015, International Business Machines
* Corporation and others. All Rights Reserved.
*******************************************************************************
* file name: charstr.cpp
* encoding: UTF-8
* tab size: 8 (not used)
* indentation:4
*
* created on: 2010may19
* created by: Markus W. Scherer
*/
#include "unicode/utypes.h"
#include "unicode/putil.h"
#include "charstr.h"
#include "cmemory.h"
#include "cstring.h"
#include "uinvchar.h"
U_NAMESPACE_BEGIN
CharString::CharString(CharString&& src) U_NOEXCEPT
: buffer(std::move(src.buffer)), len(src.len) {
src.len = 0; // not strictly necessary because we make no guarantees on the source string
}
CharString& CharString::operator=(CharString&& src) U_NOEXCEPT {
buffer = std::move(src.buffer);
len = src.len;
src.len = 0; // not strictly necessary because we make no guarantees on the source string
return *this;
}
char *CharString::cloneData(UErrorCode &errorCode) const {
if (U_FAILURE(errorCode)) { return nullptr; }
char *p = static_cast<char *>(uprv_malloc(len + 1));
if (p == nullptr) {
errorCode = U_MEMORY_ALLOCATION_ERROR;
return nullptr;
}
uprv_memcpy(p, buffer.getAlias(), len + 1);
return p;
}
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;
}
int32_t CharString::lastIndexOf(char c) const {
for(int32_t i=len; i>0;) {
if(buffer[--i]==c) {
return i;
}
}
return -1;
}
bool CharString::contains(StringPiece s) const {
if (s.empty()) { return false; }
const char *p = buffer.getAlias();
int32_t lastStart = len - s.length();
for (int32_t i = 0; i <= lastStart; ++i) {
if (uprv_memcmp(p + i, s.data(), s.length()) == 0) {
return true;
}
}
return false;
}
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= static_cast<int32_t>(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) {
return appendInvariantChars(s.getBuffer(), s.length(), errorCode);
}
CharString &CharString::appendInvariantChars(const UChar* uchars, int32_t ucharsLen, UErrorCode &errorCode) {
if(U_FAILURE(errorCode)) {
return *this;
}
if (!uprv_isInvariantUString(uchars, ucharsLen)) {
errorCode = U_INVARIANT_CONVERSION_ERROR;
return *this;
}
if(ensureCapacity(len+ucharsLen+1, 0, errorCode)) {
u_UCharsToChars(uchars, buffer.getAlias()+len, ucharsLen);
len += ucharsLen;
buffer[len] = 0;
}
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;
}
CharString &CharString::appendPathPart(StringPiece s, UErrorCode &errorCode) {
if(U_FAILURE(errorCode)) {
return *this;
}
if(s.length()==0) {
return *this;
}
char c;
if(len>0 && (c=buffer[len-1])!=U_FILE_SEP_CHAR && c!=U_FILE_ALT_SEP_CHAR) {
append(U_FILE_SEP_CHAR, errorCode);
}
append(s, errorCode);
return *this;
}
CharString &CharString::ensureEndsWithFileSeparator(UErrorCode &errorCode) {
char c;
if(U_SUCCESS(errorCode) && len>0 &&
(c=buffer[len-1])!=U_FILE_SEP_CHAR && c!=U_FILE_ALT_SEP_CHAR) {
append(U_FILE_SEP_CHAR, errorCode);
}
return *this;
}
U_NAMESPACE_END
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