///////////////////////////////////////////////////////////////////////////////
-// Name: buffer.h
+// Name: wx/buffer.h
// Purpose: auto buffer classes: buffers which automatically free memory
// Author: Vadim Zeitlin
// Modified by:
#define _WX_BUFFER_H
#include "wx/wxchar.h"
+
#include <string.h> // strdup
// ----------------------------------------------------------------------------
{
public:
wxCharBuffer(const char *str)
+ : m_str(str ? strdup(str) : NULL)
{
- wxASSERT_MSG( str, _T("NULL string in wxCharBuffer") );
-
- m_str = str ? strdup(str) : (char *)NULL;
}
+
wxCharBuffer(size_t len)
+ : m_str((char *)malloc((len + 1)*sizeof(char)))
{
- m_str = (char *)malloc(len+1);
- m_str[len] = '\0';
+ m_str[len] = '\0';
}
+
// no need to check for NULL, free() does it
- ~wxCharBuffer() { free(m_str); }
+ ~wxCharBuffer() { free(m_str); }
- wxCharBuffer(const wxCharBuffer& src)
- {
- m_str = src.m_str;
- // no reference count yet...
- ((wxCharBuffer*)&src)->m_str = (char *)NULL;
- }
- wxCharBuffer& operator=(const wxCharBuffer& src)
- {
- m_str = src.m_str;
- // no reference count yet...
- ((wxCharBuffer*)&src)->m_str = (char *)NULL;
- return *this;
- }
+ wxCharBuffer(const wxCharBuffer& src)
+ : m_str(src.m_str)
+ {
+ // no reference count yet...
+ ((wxCharBuffer*)&src)->m_str = (char *)NULL;
+ }
+ wxCharBuffer& operator=(const wxCharBuffer& src)
+ {
+ m_str = src.m_str;
+ // no reference count yet...
+ ((wxCharBuffer*)&src)->m_str = (char *)NULL;
+ return *this;
+ }
- operator const char *() const { return m_str; }
+ const char *data() const { return m_str; }
+ operator const char *() const { return m_str; }
+ char operator[](size_t n) const { return m_str[n]; }
private:
- char *m_str;
+ char *m_str;
};
#if wxUSE_WCHAR_T
+
class wxWCharBuffer
{
public:
wxWCharBuffer(const wchar_t *wcs)
+ : m_wcs((wchar_t *)NULL)
{
- wxASSERT_MSG( wcs, _T("NULL string in wxWCharBuffer") );
-
if (wcs) {
- size_t siz = (wcslen(wcs)+1)*sizeof(wchar_t);
+ size_t siz = (wxWcslen(wcs) + 1)*sizeof(wchar_t);
m_wcs = (wchar_t *)malloc(siz);
memcpy(m_wcs, wcs, siz);
}
- else m_wcs = (wchar_t *)NULL;
}
wxWCharBuffer(size_t len)
+ : m_wcs((wchar_t *)malloc((len + 1)*sizeof(wchar_t)))
{
- m_wcs = (wchar_t *)malloc((len+1)*sizeof(wchar_t));
- m_wcs[len] = L'\0';
+ m_wcs[len] = L'\0';
}
// no need to check for NULL, free() does it
- ~wxWCharBuffer() { free(m_wcs); }
+ ~wxWCharBuffer() { free(m_wcs); }
- wxWCharBuffer(const wxWCharBuffer& src)
- {
- m_wcs = src.m_wcs;
- // no reference count yet...
- ((wxWCharBuffer*)&src)->m_wcs = (wchar_t *)NULL;
- }
- wxWCharBuffer& operator=(const wxWCharBuffer& src)
- {
- m_wcs = src.m_wcs;
- // no reference count yet...
- ((wxWCharBuffer*)&src)->m_wcs = (wchar_t *)NULL;
- return *this;
- }
+ wxWCharBuffer(const wxWCharBuffer& src)
+ : m_wcs(src.m_wcs)
+ {
+ // no reference count yet...
+ ((wxWCharBuffer*)&src)->m_wcs = (wchar_t *)NULL;
+ }
+ wxWCharBuffer& operator=(const wxWCharBuffer& src)
+ {
+ m_wcs = src.m_wcs;
+ // no reference count yet...
+ ((wxWCharBuffer*)&src)->m_wcs = (wchar_t *)NULL;
+ return *this;
+ }
- operator const wchar_t *() const { return m_wcs; }
+ const wchar_t *data() const { return m_wcs; }
+ operator const wchar_t *() const { return m_wcs; }
+ wchar_t operator[](size_t n) const { return m_wcs[n]; }
private:
- wchar_t *m_wcs;
+ wchar_t *m_wcs;
};
-#endif
+
+#endif // wxUSE_WCHAR_T
#if wxUSE_UNICODE
-#define wxMB2WXbuf wxWCharBuffer
-#define wxWX2MBbuf wxCharBuffer
-#define wxWC2WXbuf wxChar*
-#define wxWX2WCbuf wxChar*
-#else
-#define wxMB2WXbuf wxChar*
-#define wxWX2MBbuf wxChar*
-#define wxWC2WXbuf wxCharBuffer
-#define wxWX2WCbuf wxWCharBuffer
-#endif
+ #define wxMB2WXbuf wxWCharBuffer
+ #define wxWX2MBbuf wxCharBuffer
+ #define wxWC2WXbuf wxChar*
+ #define wxWX2WCbuf wxChar*
+#else // ANSI
+ #define wxMB2WXbuf wxChar*
+ #define wxWX2MBbuf wxChar*
+ #define wxWC2WXbuf wxCharBuffer
+ #define wxWX2WCbuf wxWCharBuffer
+#endif // Unicode/ANSI
+
+// ----------------------------------------------------------------------------
+// A class for holding growable data buffers (not necessarily strings)
+// ----------------------------------------------------------------------------
+
+class wxMemoryBuffer
+{
+public:
+ enum { BLOCK_SIZE = 1024 };
+ wxMemoryBuffer(size_t size = wxMemoryBuffer::BLOCK_SIZE)
+ : m_data(malloc(size)), m_size(size), m_len(0)
+ {
+ }
+
+ ~wxMemoryBuffer() { free(m_data); }
+
+ // Accessors
+ void* GetData() const { return m_data; }
+ size_t GetBufSize() const { return m_size; }
+ size_t GetDataLen() const { return m_len; }
+
+ void SetBufSize(size_t size) { ResizeIfNeeded(size); }
+ void SetDataLen(size_t len)
+ {
+ wxASSERT(len <= m_size);
+ m_len = len;
+ }
+
+ // Ensure the buffer is big enough and return a pointer to it
+ void* GetWriteBuf(size_t sizeNeeded)
+ {
+ ResizeIfNeeded(sizeNeeded);
+ return m_data;
+ }
+ // Update the length after the write
+ void UngetWriteBuf(size_t sizeUsed) { SetDataLen(sizeUsed); }
+
+ // Like the above, but appends to the buffer
+ void* GetAppendBuf(size_t sizeNeeded)
+ {
+ ResizeIfNeeded(m_len + sizeNeeded);
+ return (char*)m_data + m_len;
+ }
+ void UngetAppendBuf(size_t sizeUsed) { SetDataLen(m_len + sizeUsed); }
+
+ // Other ways to append to the buffer
+ void AppendByte(char data) {
+ ResizeIfNeeded(m_len + 1);
+ *(((char*)m_data)+m_len) = data;
+ m_len += 1;
+ }
+ void AppendData(void* data, size_t len)
+ {
+ memcpy(GetAppendBuf(len), data, len);
+ UngetAppendBuf(len);
+ }
+
+ operator const char *() const { return (const char*)m_data; }
+
+
+ // Copy and assignment
+ wxMemoryBuffer(const wxMemoryBuffer& src)
+ : m_data(src.m_data), m_size(src.m_size), m_len(src.m_len)
+ {
+ // no reference count yet...
+ ((wxMemoryBuffer*)&src)->m_data = NULL;
+ ((wxMemoryBuffer*)&src)->m_size = 0;
+ ((wxMemoryBuffer*)&src)->m_len = 0;
+ }
+
+ wxMemoryBuffer& operator=(const wxMemoryBuffer& src)
+ {
+ m_data = src.m_data;
+ m_size = src.m_size;
+ m_len = src.m_len;
+
+ // no reference count yet...
+ ((wxMemoryBuffer*)&src)->m_data = NULL;
+ ((wxMemoryBuffer*)&src)->m_size = 0;
+ ((wxMemoryBuffer*)&src)->m_len = 0;
+
+ return *this;
+ }
+
+
+protected:
+ void ResizeIfNeeded(size_t newSize)
+ {
+ if (newSize > m_size)
+ {
+ m_data = realloc(m_data, newSize + wxMemoryBuffer::BLOCK_SIZE);
+ wxASSERT(m_data != NULL);
+ m_size = newSize + wxMemoryBuffer::BLOCK_SIZE;
+ }
+ }
+
+private:
+ void* m_data;
+ size_t m_size;
+ size_t m_len;
+};
// ----------------------------------------------------------------------------
// template class for any kind of data
projects / wxWidgets.git / blobdiff