1 files changed, 116 insertions, 0 deletions
diff --git a/Src/Plugins/Library/ml_local/MLString.cpp b/Src/Plugins/Library/ml_local/MLString.cpp
new file mode 100644
index 00000000..32b8e229
--- /dev/null
+++ b/Src/Plugins/Library/ml_local/MLString.cpp
@@ -0,0 +1,116 @@
+#include "main.h"
+#include ".\MLString.h"
+#include <strsafe.h>
+
+#define ALLOCATION_STEP		16
+
+void* MLString::heap = GetProcessHeap();
+
+MLString::MLString(void) : buffer(NULL), allocated(0), cchLen(0)
+{
+}
+
+MLString::MLString(const wchar_t* string)  : buffer(NULL), allocated(0), cchLen(0)
+{
+	if (string) Append(string, lstrlenW(string));
+}
+MLString::MLString(unsigned int cchBuffer)  : buffer(NULL), allocated(0), cchLen(0)
+{
+	Allocate(cchBuffer);
+}
+
+MLString::MLString(const MLString &copy)  : buffer(NULL), allocated(0)
+{
+	cchLen = copy.cchLen;
+	Allocate(cchLen +  1);
+	CopyMemory(buffer, copy.buffer, cchLen*sizeof(wchar_t));
+}
+
+MLString::~MLString(void)
+{
+	if (buffer)
+	{
+		HeapFree(heap, NULL, buffer);
+		allocated = 0;
+		cchLen = 0;
+		buffer = NULL;
+	}
+}
+
+HRESULT MLString::Append(const wchar_t* string, unsigned int cchLength)
+{
+	if (allocated <= cchLen + cchLength)
+	{
+		do { allocated += ALLOCATION_STEP; } while(allocated < cchLen + cchLength + 1);
+		buffer = (wchar_t*) ((!buffer) ? HeapAlloc(heap, NULL, allocated*sizeof(wchar_t)) : 
+								HeapReAlloc(heap, NULL, buffer, allocated*sizeof(wchar_t)));
+	}
+	if (!buffer) return ERROR_OUTOFMEMORY;
+	CopyMemory(buffer + cchLen, string, cchLength*sizeof(wchar_t));
+	cchLen += cchLength;
+	buffer[cchLen] = 0x0000;
+	return S_OK;
+}
+
+HRESULT MLString::Set(const wchar_t* string, unsigned int cchLength)
+{
+	cchLen = 0;
+	return Append(string, cchLength);
+}
+
+HRESULT MLString::Allocate(unsigned int cchNewSize)
+{
+	if (cchNewSize <= cchLen) return ERROR_BAD_LENGTH;
+	if (allocated >= cchNewSize) return S_OK;
+	allocated = cchNewSize;
+	buffer = (wchar_t*) ((!buffer) ? HeapAlloc(heap, NULL, allocated*sizeof(wchar_t)) : 
+								HeapReAlloc(heap, NULL, buffer, allocated*sizeof(wchar_t)));
+	return (buffer) ? S_OK : ERROR_OUTOFMEMORY;
+}
+
+void MLString::Compact(void)
+{
+	if (!buffer) return;
+	if (0 == cchLen)
+	{
+		HeapFree(heap, NULL, buffer);
+		allocated = 0;
+		cchLen = 0;
+		buffer = NULL;
+	}
+	else
+	{
+		allocated = cchLen + 1;
+		buffer = (wchar_t*)HeapReAlloc(heap, NULL, buffer, allocated*sizeof(wchar_t));
+	}
+}
+
+HRESULT MLString::Format(const wchar_t *format, ...)
+{
+	va_list argList;
+	va_start(argList, format);
+	HRESULT retCode;
+	size_t remaining = 0;
+	retCode = (allocated) ? StringCchVPrintfExW(buffer, allocated, NULL, &remaining, STRSAFE_NULL_ON_FAILURE, format, argList) : STRSAFE_E_INSUFFICIENT_BUFFER; 
+	while (STRSAFE_E_INSUFFICIENT_BUFFER == retCode)
+	{
+		int attempt = 1;
+		allocated += ALLOCATION_STEP*attempt;
+		attempt++;
+		buffer = (wchar_t*) ((!buffer) ? HeapAlloc(heap, NULL, allocated*sizeof(wchar_t)) : 
+								HeapReAlloc(heap, NULL, buffer, allocated*sizeof(wchar_t)));
+		retCode = StringCchVPrintfExW(buffer, allocated, NULL, &remaining, STRSAFE_NULL_ON_FAILURE, format, argList); 
+	}
+	va_end(argList);
+	cchLen = (S_OK == retCode) ? allocated - (unsigned int)remaining : 0;
+	return retCode;
+}
+
+HRESULT MLString::CopyTo(MLString *destination)
+{
+	HRESULT retCode = destination->Allocate(allocated);
+	if (S_OK != retCode) return retCode;
+	destination->cchLen = cchLen;
+	CopyMemory(destination->buffer, buffer, cchLen*sizeof(wchar_t));
+	return S_OK;
+}
+\ No newline at end of file