Fix for #15520: wxRichTextCtrl: Drawing the selection doesn't respect its container...

[wxWidgets.git] / src / common / strconv.cpp

diff --git a/src/common/strconv.cpp b/src/common/strconv.cpp
index bf0b0923c76c3c152d9cbea9016054fca0007da0..a4331280112c1c263723b020ba66134f9c472cf2 100644 (file)
--- a/src/common/strconv.cpp
+++ b/src/common/strconv.cpp
@@ -5,7 +5,6 @@
 //              Ryan Norton, Fredrik Roubert (UTF7)
 // Modified by:
 // Created:     29/01/98
-// RCS-ID:      $Id$
 // Copyright:   (c) 1999 Ove Kaaven, Robert Roebling, Vaclav Slavik
 //              (c) 2000-2003 Vadim Zeitlin
 //              (c) 2004 Ryan Norton, Fredrik Roubert
@@ -460,7 +459,6 @@ wxMBConv::cMB2WC(const char *inBuff, size_t inLen, size_t *outLen) const
         // because we want the buffer to always be NUL-terminated, even if the
         // input isn't (as otherwise the caller has no way to know its length)
         wxWCharBuffer wbuf(dstLen);
-        wbuf.data()[dstLen] = L'\0';
         if ( ToWChar(wbuf.data(), dstLen, inBuff, inLen) != wxCONV_FAILED )
         {
             if ( outLen )
@@ -995,7 +993,7 @@ wxMBConvStrictUTF8::ToWChar(wchar_t *dst, size_t dstLen,
 
     for ( const char *p = src; ; p++ )
     {
-        if ( !(srcLen == wxNO_LEN ? *p : srcLen) )
+        if ( (srcLen == wxNO_LEN ? !*p : !srcLen) )
         {
             // all done successfully, just add the trailing NULL if we are not
             // using explicit length
@@ -1115,7 +1113,7 @@ wxMBConvStrictUTF8::FromWChar(char *dst, size_t dstLen,
 
     for ( const wchar_t *wp = src; ; wp++ )
     {
-        if ( !(srcLen == wxNO_LEN ? *wp : srcLen) )
+        if ( (srcLen == wxNO_LEN ? !*wp : !srcLen) )
         {
             // all done successfully, just add the trailing NULL if we are not
             // using explicit length
@@ -1145,6 +1143,8 @@ wxMBConvStrictUTF8::FromWChar(char *dst, size_t dstLen,
         {
             // skip the next char too as we decoded a surrogate
             wp++;
+            if ( srcLen != wxNO_LEN )
+                srcLen--;
         }
 #else // wchar_t is UTF-32
         code = *wp & 0x7fffffff;
@@ -1230,7 +1230,10 @@ size_t wxMBConvUTF8::ToWChar(wchar_t *buf, size_t n,
 
     size_t len = 0;
 
-    while ((srcLen == wxNO_LEN ? *psz : srcLen--) && ((!buf) || (len < n)))
+    // The length can be either given explicitly or computed implicitly for the
+    // NUL-terminated strings.
+    const bool isNulTerminated = srcLen == wxNO_LEN;
+    while ((isNulTerminated ? *psz : srcLen--) && ((!buf) || (len < n)))
     {
         const char *opsz = psz;
         bool invalid = false;
@@ -1364,10 +1367,17 @@ size_t wxMBConvUTF8::ToWChar(wchar_t *buf, size_t n,
         }
     }
 
-    if (srcLen == wxNO_LEN && buf && (len < n))
-        *buf = 0;
+    if ( isNulTerminated )
+    {
+        // Add the trailing NUL in this case if we have a large enough buffer.
+        if ( buf && (len < n) )
+            *buf = 0;
+
+        // And count it in any case.
+        len++;
+    }
 
-    return len + 1;
+    return len;
 }
 
 static inline bool isoctal(wchar_t wch)
@@ -1383,7 +1393,10 @@ size_t wxMBConvUTF8::FromWChar(char *buf, size_t n,
 
     size_t len = 0;
 
-    while ((srcLen == wxNO_LEN ? *psz : srcLen--) && ((!buf) || (len < n)))
+    // The length can be either given explicitly or computed implicitly for the
+    // NUL-terminated strings.
+    const bool isNulTerminated = srcLen == wxNO_LEN;
+    while ((isNulTerminated ? *psz : srcLen--) && ((!buf) || (len < n)))
     {
         wxUint32 cc;
 
@@ -1451,10 +1464,17 @@ size_t wxMBConvUTF8::FromWChar(char *buf, size_t n,
         }
     }
 
-    if (srcLen == wxNO_LEN && buf && (len < n))
-        *buf = 0;
+    if ( isNulTerminated )
+    {
+        // Add the trailing NUL in this case if we have a large enough buffer.
+        if ( buf && (len < n) )
+            *buf = 0;
 
-    return len + 1;
+        // And count it in any case.
+        len++;
+    }
+
+    return len;
 }
 
 // ============================================================================
@@ -1645,7 +1665,7 @@ wxMBConvUTF16straight::FromWChar(char *dst, size_t dstLen,
     wxUint16 *outBuff = reinterpret_cast<wxUint16 *>(dst);
     for ( size_t n = 0; n < srcLen; n++ )
     {
-        wxUint16 cc[2];
+        wxUint16 cc[2] = { 0 };
         const size_t numChars = encode_utf16(*src++, cc);
         if ( numChars == wxCONV_FAILED )
             return wxCONV_FAILED;
@@ -1728,7 +1748,7 @@ wxMBConvUTF16swap::FromWChar(char *dst, size_t dstLen,
     wxUint16 *outBuff = reinterpret_cast<wxUint16 *>(dst);
     for ( const wchar_t *srcEnd = src + srcLen; src < srcEnd; src++ )
     {
-        wxUint16 cc[2];
+        wxUint16 cc[2] = { 0 };
         const size_t numChars = encode_utf16(*src, cc);
         if ( numChars == wxCONV_FAILED )
             return wxCONV_FAILED;
@@ -1812,7 +1832,7 @@ wxMBConvUTF32straight::ToWChar(wchar_t *dst, size_t dstLen,
     size_t outLen = 0;
     for ( size_t n = 0; n < inLen; n++ )
     {
-        wxUint16 cc[2];
+        wxUint16 cc[2] = { 0 };
         const size_t numChars = encode_utf16(*inBuff++, cc);
         if ( numChars == wxCONV_FAILED )
             return wxCONV_FAILED;
@@ -1890,7 +1910,7 @@ wxMBConvUTF32swap::ToWChar(wchar_t *dst, size_t dstLen,
     size_t outLen = 0;
     for ( size_t n = 0; n < inLen; n++, inBuff++ )
     {
-        wxUint16 cc[2];
+        wxUint16 cc[2] = { 0 };
         const size_t numChars = encode_utf16(wxUINT32_SWAP_ALWAYS(*inBuff), cc);
         if ( numChars == wxCONV_FAILED )
             return wxCONV_FAILED;
@@ -2183,7 +2203,7 @@ wxMBConv_iconv::wxMBConv_iconv(const char *name)
         {
 #if SIZEOF_WCHAR_T == 4
             wxT("UCS-4"),
-#elif SIZEOF_WCHAR_T = 2
+#elif SIZEOF_WCHAR_T == 2
             wxT("UCS-2"),
 #endif
             NULL