fix recently introduced memory leak of m_conv (bug 1466559)

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

diff --git a/src/common/xpmdecod.cpp b/src/common/xpmdecod.cpp
index 89cdad65eed7b0b2da8c0ebecdd890af03ba260f..12612d62ba7854836b057579c3e2ed51067c76d7 100644 (file)
--- a/src/common/xpmdecod.cpp
+++ b/src/common/xpmdecod.cpp
@@ -90,10 +90,6 @@ license is as follows:
  * in this Software without prior written authorization from GROUPE BULL.
  */
 
-#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
-#pragma implementation "xpmdecod.h"
-#endif
-
 // For compilers that support precompilation, includes "wx.h".
 #include "wx/wxprec.h"
 
@@ -221,7 +217,7 @@ wxImage wxXPMDecoder::ReadFile(wxInputStream& stream)
         return wxNullImage;
     }
 
-    xpm_lines = new const char*[lines_cnt];
+    xpm_lines = new const char*[lines_cnt + 1];
     xpm_lines[0] = xpm_buffer;
     line = 1;
     for (p = xpm_buffer; (*p != '\0') && (line < lines_cnt); p++)
@@ -234,6 +230,8 @@ wxImage wxXPMDecoder::ReadFile(wxInputStream& stream)
         }
     }
 
+    xpm_lines[lines_cnt] = NULL;
+
     /*
      *  Read the image:
      */
@@ -655,12 +653,15 @@ static const char *ParseColor(const char *data)
 
 struct wxXPMColourMapData
 {
+    wxXPMColourMapData() { R = G = B = 0; }
     unsigned char R,G,B;
 };
 WX_DECLARE_STRING_HASH_MAP(wxXPMColourMapData, wxXPMColourMap);
 
 wxImage wxXPMDecoder::ReadData(const char **xpm_data)
 {
+    wxCHECK_MSG(xpm_data, wxNullImage, wxT("NULL XPM data") );
+
     wxImage img;
     int count;
     unsigned width, height, colors_cnt, chars_per_pixel;
@@ -668,7 +669,6 @@ wxImage wxXPMDecoder::ReadData(const char **xpm_data)
     wxChar key[64];
     const char *clr_def;
     bool hasMask;
-    wxXPMColourMapData clr_data;
     wxXPMColourMap clr_tbl;
     wxXPMColourMap::iterator it;
     wxString maskKey;
@@ -681,7 +681,7 @@ wxImage wxXPMDecoder::ReadData(const char **xpm_data)
                    &width, &height, &colors_cnt, &chars_per_pixel);
     if ( count != 4 || width * height * colors_cnt == 0 )
     {
-        wxLogError(_T("XPM: Not XPM data!"));
+        wxLogError(_("XPM: incorrect header format!"));
         return wxNullImage;
     }
 
@@ -690,8 +690,8 @@ wxImage wxXPMDecoder::ReadData(const char **xpm_data)
     //     8bit RGB...
     wxCHECK_MSG(chars_per_pixel < 64, wxNullImage, wxT("XPM colormaps this large not supported."));
 
-    img.Create(width, height);
-    if ( !img.Ok() ) return img;
+    if ( !img.Create(width, height) )
+        return wxNullImage;
 
     img.SetMask(false);
     key[chars_per_pixel] = wxT('\0');
@@ -700,40 +700,50 @@ wxImage wxXPMDecoder::ReadData(const char **xpm_data)
     /*
      *  Create colour map:
      */
+    wxXPMColourMapData clr_data;
     for (i = 0; i < colors_cnt; i++)
     {
+        const char *xmpColLine = xpm_data[1 + i];
+
+        // we must have at least " x y" after the colour index, hence +5
+        if ( !xmpColLine || strlen(xmpColLine) < chars_per_pixel + 5 )
+        {
+            wxLogError(_("XPM: incorrect colour description in line %d"),
+                       (int)(1 + i));
+            return wxNullImage;
+        }
+
         for (i_key = 0; i_key < chars_per_pixel; i_key++)
-            key[i_key] = (wxChar)xpm_data[1 + i][i_key];
-        clr_def = ParseColor(xpm_data[1 + i] + chars_per_pixel);
+            key[i_key] = (wxChar)xmpColLine[i_key];
+        clr_def = ParseColor(xmpColLine + chars_per_pixel);
 
         if ( clr_def == NULL )
         {
-            wxLogError(_("XPM: malformed colour definition '%s'!"),
-                       xpm_data[1+i]);
-            clr_data.R = 255, clr_data.G = 0, clr_data.B = 255;
+            wxLogError(_("XPM: malformed colour definition '%s' at line %d!"),
+                       xmpColLine, (int)(1 + i));
+            return wxNullImage;
         }
-        else
+
+        bool isNone = false;
+        if ( !GetRGBFromName(clr_def, &isNone,
+                             &clr_data.R, &clr_data.G, &clr_data.B) )
         {
-            bool isNone;
-            if ( !GetRGBFromName(clr_def, &isNone,
-                                 &clr_data.R, &clr_data.G, &clr_data.B) )
-            {
-                wxLogError(_("XPM: malformed colour definition '%s'!"),
-                           xpm_data[1+i]);
-                clr_data.R = 255, clr_data.G = 0, clr_data.B = 255;
-            }
-            else
-            {
-                if ( isNone )
-                {
-                    img.SetMask(true);
-                    img.SetMaskColour(255, 0, 255);
-                    hasMask = true;
-                    clr_data.R = 255, clr_data.G = 0, clr_data.B = 255;
-                    maskKey = key;
-                }
-            }
+            wxLogError(_("XPM: malformed colour definition '%s' at line %d!"),
+                       xmpColLine, (int)(1 + i));
+            return wxNullImage;
         }
+
+        if ( isNone )
+        {
+            img.SetMask(true);
+            img.SetMaskColour(255, 0, 255);
+            clr_data.R =
+            clr_data.B = 255;
+            clr_data.G = 0;
+            hasMask = true;
+            maskKey = key;
+        }
+
         clr_tbl[key] = clr_data;
     }
 
@@ -744,7 +754,7 @@ wxImage wxXPMDecoder::ReadData(const char **xpm_data)
      */
     if (hasMask)
     {
-        for (it = clr_tbl.begin(); it != clr_tbl.end(); it++)
+        for (it = clr_tbl.begin(); it != clr_tbl.end(); ++it)
         {
             if (it->second.R == 255 && it->second.G == 0 &&
                 it->second.B == 255 &&
@@ -767,9 +777,19 @@ wxImage wxXPMDecoder::ReadData(const char **xpm_data)
     {
         for (i = 0; i < width; i++, img_data += 3)
         {
+            const char *xpmImgLine = xpm_data[1 + colors_cnt + j];
+            if ( !xpmImgLine || strlen(xpmImgLine) < width*chars_per_pixel )
+            {
+                wxLogError(_("XPM: truncated image data at line %d!"),
+                           (int)(1 + colors_cnt + j));
+                return wxNullImage;
+            }
+
             for (i_key = 0; i_key < chars_per_pixel; i_key++)
-                key[i_key] = (wxChar)xpm_data[1 + colors_cnt + j]
-                                             [chars_per_pixel * i + i_key];
+            {
+                key[i_key] = (wxChar)xpmImgLine[chars_per_pixel * i + i_key];
+            }
+
             entry = clr_tbl.find(key);
             if ( entry == end )
             {