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#include "./stringvector.h"
#include <strsafe.h>
StringVector::StringVector(size_t cchAllocate, int cchAllocateStep) : pointers(NULL), ptCount(0), ptAllocated(0)
{
if (cchAllocate)
{
cchBuffer = cchAllocate;
buffer = (wchar_t*)HeapAlloc(GetProcessHeap(), NULL, cchBuffer * sizeof(wchar_t));
}
else
{
cchBuffer = 0;
buffer = NULL;
}
tail = buffer;
allocateStep = cchAllocateStep;
}
StringVector::~StringVector(void)
{
if (buffer)
{
HANDLE hHeap = GetProcessHeap();
HeapFree(hHeap, NULL, buffer);
cchBuffer = 0;
tail = NULL;
buffer = NULL;
if (pointers)
{
HeapFree(hHeap, NULL, pointers);
ptCount = 0;
ptAllocated =0;
pointers = NULL;
}
}
}
size_t StringVector::Count(void) { return ptCount; }
size_t StringVector::GetCbAllocated(void){ return cchBuffer * sizeof(wchar_t); }
size_t StringVector::GetCchAllocated(void) { return cchBuffer; }
LPCWSTR StringVector::GetString(size_t index) { return (index >= 0 && index < ptCount) ? buffer + pointers[index].offset : NULL; }
int StringVector::GetStringLength(size_t index) { return (index >= 0 && index < ptCount) ? pointers[index].length : -1; }
void StringVector::Clear(void)
{
tail = buffer;
ptCount = 0;
}
int StringVector::SetAllocateStep(int cchNewStep)
{
if (cchNewStep < 1) return allocateStep;
int tmp = allocateStep;
allocateStep = cchNewStep;
return tmp;
}
size_t StringVector::Add(const wchar_t *entry, int cchLen)
{
if (!entry) return -1;
if (cchLen < 0) cchLen = lstrlenW(entry);
if (cchLen == 0) return -1;
size_t cchNeed = (size_t)(tail - buffer) + cchLen + 2;
if (cchBuffer < cchNeed)
{
while ( cchBuffer < cchNeed) cchBuffer += allocateStep;
size_t offset_tail = (size_t)(tail - buffer);
buffer = (wchar_t*)( (buffer) ? HeapReAlloc(GetProcessHeap(), NULL, buffer, cchBuffer*sizeof(wchar_t)) : HeapAlloc(GetProcessHeap(), NULL, cchBuffer*sizeof(wchar_t)));
tail = buffer + offset_tail;
}
if (S_OK != StringCchCopyNW(tail, cchBuffer - (size_t)(tail - buffer), entry, cchLen)) return -1;
if (ptCount == ptAllocated)
{
ptAllocated += 24;
pointers = (HRECORD)( (pointers) ? HeapReAlloc(GetProcessHeap(), NULL, pointers, ptAllocated*sizeof(RECORD)) : HeapAlloc(GetProcessHeap(), NULL, ptAllocated*sizeof(RECORD)));
if (pointers == NULL)
{
DWORD err = GetLastError();
err += 1;
}
}
pointers[ptCount].offset = tail - buffer;
pointers[ptCount].length = cchLen;
tail += cchLen + 1;
ptCount++;
return ptCount -1;
}
BOOL StringVector::Remove(size_t index)
{
if (index < 0 || index >= ptCount) return FALSE;
ptCount--;
for (size_t i = index; i < ptCount; i++) pointers[i] = pointers[i + 1];
return TRUE;
}
void StringVector::TrimCount(size_t newCount)
{
if (newCount >= ptCount) return;
if (newCount <= 0) { Clear(); return; }
tail = buffer + pointers[newCount].offset;
ptCount = newCount;
}
size_t StringVector::FindString(LCID lcid, LPCWSTR string, int cchLen, BOOL igonreCase)
{
if (!string) return -1;
if (cchLen < 0) cchLen = lstrlenW(string);
if (cchLen == 0) return -1;
for (size_t i = 0; i < ptCount; i ++)
{
if ((cchLen == pointers[i].length) &&
( string == (buffer + pointers[i].offset) || CSTR_EQUAL == CompareStringW(lcid, (igonreCase) ? NORM_IGNORECASE : NULL,
buffer + pointers[i].offset,
cchLen,
string,
cchLen)))
return i;
}
return -1;
}
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