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/*
* Copyright (C) 2009 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
//
// Sortable array of strings. STL-ish, but STL-free.
//
#include <stdlib.h>
#include <string.h>
#include "StringArray.h"
namespace android {
//
// An expanding array of strings. Add, get, sort, delete.
//
StringArray::StringArray()
: mMax(0), mCurrent(0), mArray(NULL)
{
}
StringArray:: ~StringArray() {
for (int i = 0; i < mCurrent; i++)
delete[] mArray[i];
delete[] mArray;
}
//
// Add a string. A copy of the string is made.
//
bool StringArray::push_back(const char* str) {
if (mCurrent >= mMax) {
char** tmp;
if (mMax == 0)
mMax = 16; // initial storage
else
mMax *= 2;
tmp = new char*[mMax];
if (tmp == NULL)
return false;
memcpy(tmp, mArray, mCurrent * sizeof(char*));
delete[] mArray;
mArray = tmp;
}
int len = strlen(str);
mArray[mCurrent] = new char[len+1];
memcpy(mArray[mCurrent], str, len+1);
mCurrent++;
return true;
}
//
// Delete an entry.
//
void StringArray::erase(int idx) {
if (idx < 0 || idx >= mCurrent)
return;
delete[] mArray[idx];
if (idx < mCurrent-1) {
memmove(&mArray[idx], &mArray[idx+1],
(mCurrent-1 - idx) * sizeof(char*));
}
mCurrent--;
}
//
// Sort the array.
//
void StringArray::sort(int (*compare)(const void*, const void*)) {
qsort(mArray, mCurrent, sizeof(char*), compare);
}
//
// Pass this to the sort routine to do an ascending alphabetical sort.
//
int StringArray::cmpAscendingAlpha(const void* pstr1, const void* pstr2) {
return strcmp(*(const char**)pstr1, *(const char**)pstr2);
}
//
// Set entry N to specified string.
// [should use operator[] here]
//
void StringArray::setEntry(int idx, const char* str) {
if (idx < 0 || idx >= mCurrent)
return;
delete[] mArray[idx];
int len = strlen(str);
mArray[idx] = new char[len+1];
memcpy(mArray[idx], str, len+1);
}
} // namespace android
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