X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/509da4510f4e8d99b0780460adf53188f72aa101..ac55e0a1a8c344626a94bc055e018630ed77b004:/include/wx/strconv.h

diff --git a/include/wx/strconv.h b/include/wx/strconv.h
index 877c44d122..c56ae9af2f 100644
--- a/include/wx/strconv.h
+++ b/include/wx/strconv.h
@@ -1,16 +1,17 @@
 ///////////////////////////////////////////////////////////////////////////////
 // Name:        strconv.h
 // Purpose:     conversion routines for char sets any Unicode
-// Author:      Robert Roebling, Ove Kaaven
+// Author:      Ove Kaaven, Robert Roebling, Vadim Zeitlin
 // Modified by:
 // Created:     29/01/98
 // RCS-ID:      $Id$
-// Copyright:   (c) 1998 Ove Kaaven, Robert Roebling, Vadim Zeitlin
+// Copyright:   (c) 1998 Ove Kaaven, Robert Roebling
+//              (c) 1998-2006 Vadim Zeitlin
 // Licence:     wxWindows licence
 ///////////////////////////////////////////////////////////////////////////////
 
-#ifndef _WX_WXSTRCONVH__
-#define _WX_WXSTRCONVH__
+#ifndef _WX_STRCONV_H_
+#define _WX_STRCONV_H_
 
 #include "wx/defs.h"
 #include "wx/wxchar.h"
@@ -31,6 +32,10 @@
 // the error value returned by wxMBConv methods
 #define wxCONV_FAILED ((size_t)-1)
 
+// the default value for some length parameters meaning that the string is
+// NUL-terminated
+#define wxNO_LEN ((size_t)-1)
+
 // ----------------------------------------------------------------------------
 // wxMBConv (abstract base class for conversions)
 // ----------------------------------------------------------------------------
@@ -40,6 +45,9 @@
 // don't let the fact that the existing classes implement MB2WC/WC2MB() instead
 // confuse you.
 //
+// You also have to implement Clone() to allow copying the conversions
+// polymorphically.
+//
 // And you might need to override GetMBNulLen() as well.
 class WXDLLIMPEXP_BASE wxMBConv
 {
@@ -51,12 +59,13 @@ public:
     // characters, not bytes) of the converted string including any trailing
     // L'\0' or (possibly multiple) '\0'(s). If the conversion fails or if
     // there is not enough space for everything, including the trailing NUL
-    // character(s), in the output buffer, (size_t)-1 is returned.
+    // character(s), in the output buffer, wxCONV_FAILED is returned.
     //
     // In the special case when dstLen is 0 (outputBuf may be NULL then) the
     // return value is the length of the needed buffer but nothing happens
-    // otherwise. If srcLen is -1, the entire string, up to and including the
-    // trailing NUL(s), is converted, otherwise exactly srcLen bytes are.
+    // otherwise. If srcLen is wxNO_LEN, the entire string, up to and
+    // including the trailing NUL(s), is converted, otherwise exactly srcLen
+    // bytes are.
     //
     // Typical usage:
     //
@@ -67,10 +76,10 @@ public:
     //          conv.ToWChar(wbuf, dstLen, src);
     //
     virtual size_t ToWChar(wchar_t *dst, size_t dstLen,
-                           const char *src, size_t srcLen = -1) const;
+                           const char *src, size_t srcLen = wxNO_LEN) const;
 
     virtual size_t FromWChar(char *dst, size_t dstLen,
-                             const wchar_t *src, size_t srcLen = -1) const;
+                             const wchar_t *src, size_t srcLen = wxNO_LEN) const;
 
 
     // Convenience functions for translating NUL-terminated strings: returns
@@ -147,6 +156,9 @@ public:
     virtual size_t WC2MB(char *out, const wchar_t *in, size_t outLen) const;
 
 
+    // make a heap-allocated copy of this object
+    virtual wxMBConv *Clone() const = 0;
+
     // virtual dtor for any base class
     virtual ~wxMBConv();
 };
@@ -161,6 +173,8 @@ class WXDLLIMPEXP_BASE wxMBConvLibc : public wxMBConv
 public:
     virtual size_t MB2WC(wchar_t *outputBuf, const char *psz, size_t outputSize) const;
     virtual size_t WC2MB(char *outputBuf, const wchar_t *psz, size_t outputSize) const;
+
+    virtual wxMBConv *Clone() const { return new wxMBConvLibc; }
 };
 
 #ifdef __UNIX__
@@ -176,6 +190,11 @@ class WXDLLIMPEXP_BASE wxConvBrokenFileNames : public wxMBConv
 {
 public:
     wxConvBrokenFileNames(const wxChar *charset);
+    wxConvBrokenFileNames(const wxConvBrokenFileNames& conv)
+        : wxMBConv(),
+          m_conv(conv.m_conv ? conv.m_conv->Clone() : NULL)
+    {
+    }
     virtual ~wxConvBrokenFileNames() { delete m_conv; }
 
     virtual size_t MB2WC(wchar_t *out, const char *in, size_t outLen) const
@@ -194,9 +213,13 @@ public:
         return m_conv->GetMBNulLen();
     }
 
+    virtual wxMBConv *Clone() const { return new wxConvBrokenFileNames(*this); }
+
 private:
     // the conversion object we forward to
     wxMBConv *m_conv;
+
+    DECLARE_NO_ASSIGN_CLASS(wxConvBrokenFileNames)
 };
 
 #endif // __UNIX__
@@ -210,6 +233,8 @@ class WXDLLIMPEXP_BASE wxMBConvUTF7 : public wxMBConv
 public:
     virtual size_t MB2WC(wchar_t *outputBuf, const char *psz, size_t outputSize) const;
     virtual size_t WC2MB(char *outputBuf, const wchar_t *psz, size_t outputSize) const;
+
+    virtual wxMBConv *Clone() const { return new wxMBConvUTF7; }
 };
 
 // ----------------------------------------------------------------------------
@@ -219,7 +244,8 @@ public:
 class WXDLLIMPEXP_BASE wxMBConvUTF8 : public wxMBConv
 {
 public:
-    enum {
+    enum
+    {
         MAP_INVALID_UTF8_NOT = 0,
         MAP_INVALID_UTF8_TO_PUA = 1,
         MAP_INVALID_UTF8_TO_OCTAL = 2
@@ -229,6 +255,8 @@ public:
     virtual size_t MB2WC(wchar_t *outputBuf, const char *psz, size_t outputSize) const;
     virtual size_t WC2MB(char *outputBuf, const wchar_t *psz, size_t outputSize) const;
 
+    virtual wxMBConv *Clone() const { return new wxMBConvUTF8(m_options); }
+
 private:
     int m_options;
 };
@@ -240,7 +268,16 @@ private:
 class WXDLLIMPEXP_BASE wxMBConvUTF16Base : public wxMBConv
 {
 public:
-    virtual size_t GetMBNulLen() const { return 2; }
+    enum { BYTES_PER_CHAR = 2 };
+
+    virtual size_t GetMBNulLen() const { return BYTES_PER_CHAR; }
+
+protected:
+    // return the length of the buffer using srcLen if it's not wxNO_LEN and
+    // computing the length ourselves if it is; also checks that the length is
+    // even if specified as we need an entire number of UTF-16 characters and
+    // returns wxNO_LEN which indicates error if it is odd
+    static size_t GetLength(const char *src, size_t srcLen);
 };
 
 // ----------------------------------------------------------------------------
@@ -250,8 +287,11 @@ public:
 class WXDLLIMPEXP_BASE wxMBConvUTF16LE : public wxMBConvUTF16Base
 {
 public:
-    virtual size_t MB2WC(wchar_t *outputBuf, const char *psz, size_t outputSize) const;
-    virtual size_t WC2MB(char *outputBuf, const wchar_t *psz, size_t outputSize) const;
+    virtual size_t ToWChar(wchar_t *dst, size_t dstLen,
+                           const char *src, size_t srcLen = wxNO_LEN) const;
+    virtual size_t FromWChar(char *dst, size_t dstLen,
+                             const wchar_t *src, size_t srcLen = wxNO_LEN) const;
+    virtual wxMBConv *Clone() const { return new wxMBConvUTF16LE; }
 };
 
 // ----------------------------------------------------------------------------
@@ -261,8 +301,11 @@ public:
 class WXDLLIMPEXP_BASE wxMBConvUTF16BE : public wxMBConvUTF16Base
 {
 public:
-    virtual size_t MB2WC(wchar_t *outputBuf, const char *psz, size_t outputSize) const;
-    virtual size_t WC2MB(char *outputBuf, const wchar_t *psz, size_t outputSize) const;
+    virtual size_t ToWChar(wchar_t *dst, size_t dstLen,
+                           const char *src, size_t srcLen = wxNO_LEN) const;
+    virtual size_t FromWChar(char *dst, size_t dstLen,
+                             const wchar_t *src, size_t srcLen = wxNO_LEN) const;
+    virtual wxMBConv *Clone() const { return new wxMBConvUTF16BE; }
 };
 
 // ----------------------------------------------------------------------------
@@ -272,7 +315,15 @@ public:
 class WXDLLIMPEXP_BASE wxMBConvUTF32Base : public wxMBConv
 {
 public:
-    virtual size_t GetMBNulLen() const { return 4; }
+    enum { BYTES_PER_CHAR = 4 };
+
+    virtual size_t GetMBNulLen() const { return BYTES_PER_CHAR; }
+
+protected:
+    // this is similar to wxMBConvUTF16Base method with the same name except
+    // that, of course, it verifies that length is divisible by 4 if given and
+    // not by 2
+    static size_t GetLength(const char *src, size_t srcLen);
 };
 
 // ----------------------------------------------------------------------------
@@ -282,8 +333,11 @@ public:
 class WXDLLIMPEXP_BASE wxMBConvUTF32LE : public wxMBConvUTF32Base
 {
 public:
-    virtual size_t MB2WC(wchar_t *outputBuf, const char *psz, size_t outputSize) const;
-    virtual size_t WC2MB(char *outputBuf, const wchar_t *psz, size_t outputSize) const;
+    virtual size_t ToWChar(wchar_t *dst, size_t dstLen,
+                           const char *src, size_t srcLen = wxNO_LEN) const;
+    virtual size_t FromWChar(char *dst, size_t dstLen,
+                             const wchar_t *src, size_t srcLen = wxNO_LEN) const;
+    virtual wxMBConv *Clone() const { return new wxMBConvUTF32LE; }
 };
 
 // ----------------------------------------------------------------------------
@@ -293,8 +347,11 @@ public:
 class WXDLLIMPEXP_BASE wxMBConvUTF32BE : public wxMBConvUTF32Base
 {
 public:
-    virtual size_t MB2WC(wchar_t *outputBuf, const char *psz, size_t outputSize) const;
-    virtual size_t WC2MB(char *outputBuf, const wchar_t *psz, size_t outputSize) const;
+    virtual size_t ToWChar(wchar_t *dst, size_t dstLen,
+                           const char *src, size_t srcLen = wxNO_LEN) const;
+    virtual size_t FromWChar(char *dst, size_t dstLen,
+                             const wchar_t *src, size_t srcLen = wxNO_LEN) const;
+    virtual wxMBConv *Clone() const { return new wxMBConvUTF32BE; }
 };
 
 // ----------------------------------------------------------------------------
@@ -319,8 +376,9 @@ public:
     virtual size_t MB2WC(wchar_t *outputBuf, const char *psz, size_t outputSize) const;
     virtual size_t WC2MB(char *outputBuf, const wchar_t *psz, size_t outputSize) const;
     virtual size_t GetMBNulLen() const;
+    virtual wxMBConv *Clone() const { return new wxCSConv(*this); }
 
-    void Clear() ;
+    void Clear();
 
 private:
     // common part of all ctors
@@ -377,9 +435,14 @@ extern WXDLLIMPEXP_DATA_BASE(wxMBConv *) wxConvFileName;
 // default in a couple of places inside wx (initially same as wxConvLibc)
 extern WXDLLIMPEXP_DATA_BASE(wxMBConv *) wxConvCurrent;
 
-// ???
+// the conversion corresponding to the current locale
 extern WXDLLIMPEXP_DATA_BASE(wxCSConv&) wxConvLocal;
 
+// the conversion corresponding to the encoding of the standard UI elements
+//
+// by default this is the same as wxConvLocal but may be changed if the program
+// needs to use a fixed encoding
+extern WXDLLIMPEXP_DATA_BASE(wxMBConv *) wxConvUI;
 
 // ----------------------------------------------------------------------------
 // endianness-dependent conversions
@@ -456,6 +519,5 @@ extern WXDLLIMPEXP_DATA_BASE(wxMBConv *) wxConvCurrent;
     #define wxConvertMB2WX(s)   (s)
 #endif // Unicode/ANSI
 
-#endif
-  // _WX_WXSTRCONVH__
+#endif // _WX_STRCONV_H_