fixed wxStrrchr(s, '\0') bug, added const and non const versions of wxStrchr, wxStrrc...

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

diff --git a/src/common/xpmdecod.cpp b/src/common/xpmdecod.cpp
index a0d99a11db2db24a8d8661dba00c578af78de168..264f1d1cf3d89e781521e667f71b72e9a38a5135 100644 (file)
--- a/src/common/xpmdecod.cpp
+++ b/src/common/xpmdecod.cpp
@@ -111,9 +111,14 @@ license is as follows:
 #include "wx/image.h"
 #include "wx/utils.h"
 #include "wx/log.h"
+#include "wx/hashmap.h"
 #include "wx/intl.h"
 #include <string.h>
 
+#ifdef __VISUALC__
+#include <ctype.h>
+#endif
+
 #include "wx/xpmdecod.h"
 
 #if wxUSE_STREAMS
@@ -121,27 +126,33 @@ bool wxXPMDecoder::CanRead(wxInputStream& stream)
 {
     unsigned char buf[9];
 
-    stream.Read(buf, 9);
-    stream.SeekI(-9, wxFromCurrent);
+    if ( !stream.Read(buf, WXSIZEOF(buf)) )
+        return FALSE;
+
+    stream.SeekI(-(off_t)WXSIZEOF(buf), wxFromCurrent);
 
-    return (memcmp(buf, "/* XPM */", 9) == 0);
+    return memcmp(buf, "/* XPM */", WXSIZEOF(buf)) == 0;
 }
 
 wxImage wxXPMDecoder::ReadFile(wxInputStream& stream)
 {
     size_t length = stream.GetSize();
-    wxCHECK_MSG(length != 0, wxNullImage, wxT("Cannot read XPM from stream of unknown size"));
+    wxCHECK_MSG( length != 0, wxNullImage,
+                 wxT("Cannot read XPM from stream of unknown size") );
 
-    char *xpm_buffer = new char[length];
-    char *p, *q;
-    size_t i;
+    // use a smart buffer to be sure to free memory even when we return on
+    // error
+    wxCharBuffer buffer(length);
 
+    char *xpm_buffer = (char *)buffer.data();
     if ( stream.Read(xpm_buffer, length).LastError() == wxSTREAM_READ_ERROR )
-        return FALSE;
+        return wxNullImage;
+    xpm_buffer[length] = '\0';
 
     /*
      *  Remove comments from the file:
      */
+    char *p, *q;
     for (p = xpm_buffer; *p != '\0'; p++)
     {
         if ( (*p == '"') || (*p == '\'') )
@@ -175,7 +186,7 @@ wxImage wxXPMDecoder::ReadFile(wxInputStream& stream)
     /*
      *  Remove unquoted characters:
      */
-    i = 0;
+    size_t i = 0;
     for (p = xpm_buffer; *p != '\0'; p++)
     {
         if ( *p != '"' )
@@ -203,6 +214,12 @@ wxImage wxXPMDecoder::ReadFile(wxInputStream& stream)
             lines_cnt++;
     }
 
+    if ( !lines_cnt )
+    {
+        // this doesn't really look an XPM image
+        return wxNullImage;
+    }
+
     xpm_lines = new const char*[lines_cnt];
     xpm_lines[0] = xpm_buffer;
     line = 1;
@@ -221,12 +238,12 @@ wxImage wxXPMDecoder::ReadFile(wxInputStream& stream)
      */
     wxImage img = ReadData(xpm_lines);
 
-    delete[] xpm_buffer;
 #ifdef __WIN16__
     delete[] (char**) xpm_lines;
 #else
     delete[] xpm_lines;
 #endif
+
     return img;
 }
 #endif // wxUSE_STREAMS
@@ -249,7 +266,7 @@ wxImage wxXPMDecoder::ReadFile(wxInputStream& stream)
 
 typedef struct
 {
-    char *name;
+    const char *name;
     wxUint32 rgb;
 } rgbRecord;
 
@@ -638,11 +655,11 @@ static const char *ParseColor(const char *data)
     return NULL;
 }
 
-class wxXPMColourMapData : public wxObject
+struct wxXPMColourMapData
 {
-    public:
-        unsigned char R,G,B;
+    unsigned char R,G,B;
 };
+WX_DECLARE_STRING_HASH_MAP(wxXPMColourMapData, wxXPMColourMap)
 
 wxImage wxXPMDecoder::ReadData(const char **xpm_data)
 {
@@ -653,8 +670,8 @@ wxImage wxXPMDecoder::ReadData(const char **xpm_data)
     wxChar key[64];
     const char *clr_def;
     bool hasMask;
-    wxXPMColourMapData *clr_data;
-    wxHashTable clr_tbl(wxKEY_STRING);
+    wxXPMColourMapData clr_data;
+    wxXPMColourMap clr_tbl;
 
     /*
      *  Read hints and initialize structures:
@@ -679,7 +696,6 @@ wxImage wxXPMDecoder::ReadData(const char **xpm_data)
     img.SetMask(FALSE);
     key[chars_per_pixel] = wxT('\0');
     hasMask = FALSE;
-    clr_tbl.DeleteContents(TRUE);
 
     /*
      *  Create colour map:
@@ -688,22 +704,21 @@ wxImage wxXPMDecoder::ReadData(const char **xpm_data)
     {
         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]);
-        clr_data = new wxXPMColourMapData;
+        clr_def = ParseColor(xpm_data[1 + i] + 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;
+            clr_data.R = 255, clr_data.G = 0, clr_data.B = 255;
         }
         else
         {
             bool isNone;
             if ( !GetRGBFromName(clr_def, &isNone,
-                                 &clr_data->R, &clr_data->G, &clr_data->B) )
+                                 &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;
+                clr_data.R = 255, clr_data.G = 0, clr_data.B = 255;
             }
             else
             {
@@ -712,17 +727,17 @@ wxImage wxXPMDecoder::ReadData(const char **xpm_data)
                     img.SetMask(TRUE);
                     img.SetMaskColour(255, 0, 255);
                     hasMask = TRUE;
-                    clr_data->R = 255, clr_data->G = 0, clr_data->B = 255;
+                    clr_data.R = 255, clr_data.G = 0, clr_data.B = 255;
                 }
                 else
                 {
-                    if ( hasMask && clr_data->R == 255 &&
-                                    clr_data->G == 0 && clr_data->B == 255 )
-                        clr_data->B = 254;
+                    if ( hasMask && clr_data.R == 255 &&
+                                    clr_data.G == 0 && clr_data.B == 255 )
+                        clr_data.B = 254;
                 }
             }
         }
-        clr_tbl.Put(key, clr_data);
+        clr_tbl[key] = clr_data;
     }
 
     /*
@@ -730,6 +745,9 @@ wxImage wxXPMDecoder::ReadData(const char **xpm_data)
      */
 
     unsigned char *img_data = img.GetData();
+    wxXPMColourMap::iterator entry;
+    wxXPMColourMap::iterator end = clr_tbl.end();
+    
     for (j = 0; j < height; j++)
     {
         for (i = 0; i < width; i++, img_data += 3)
@@ -737,16 +755,16 @@ wxImage wxXPMDecoder::ReadData(const char **xpm_data)
             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];
-            clr_data = (wxXPMColourMapData*) clr_tbl.Get(key);
-            if ( clr_data == NULL )
+            entry = clr_tbl.find(key);
+            if ( entry == end )
             {
                 wxLogError(_("XPM: Malformed pixel data!"));
             }
             else
             {
-                img_data[0] = clr_data->R;
-                img_data[1] = clr_data->G;
-                img_data[2] = clr_data->B;
+                img_data[0] = entry->second.R;
+                img_data[1] = entry->second.G;
+                img_data[2] = entry->second.B;
             }
         }
     }