wxRegion fixes (off by one)

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

diff --git a/src/common/xpmdecod.cpp b/src/common/xpmdecod.cpp
index d317187e2b91c72a009827423ea38dc04de8fd61..c4ad123d5ca3b55828626883fb6664c736bb97d1 100644 (file)
--- a/src/common/xpmdecod.cpp
+++ b/src/common/xpmdecod.cpp
@@ -114,6 +114,10 @@ license is as follows:
 #include "wx/intl.h"
 #include <string.h>
 
+#ifdef __VISUALC__
+#include <ctype.h>
+#endif
+
 #include "wx/xpmdecod.h"
 
 #if wxUSE_STREAMS
@@ -132,12 +136,13 @@ wxImage wxXPMDecoder::ReadFile(wxInputStream& stream)
     size_t length = stream.GetSize();
     wxCHECK_MSG(length != 0, wxNullImage, wxT("Cannot read XPM from stream of unknown size"));
 
-    char *xpm_buffer = new char[length];
+    char *xpm_buffer = new char[length+1];
     char *p, *q;
     size_t i;
 
-    if ( stream.Read(xpm_buffer, length).LastError() != wxSTREAM_NO_ERROR )
-        return FALSE;
+    if ( stream.Read(xpm_buffer, length).LastError() == wxSTREAM_READ_ERROR )
+        return wxNullImage;
+    xpm_buffer[length] = '\0';
 
     /*
      *  Remove comments from the file:
@@ -203,6 +208,12 @@ 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;
@@ -222,7 +233,11 @@ 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
@@ -491,6 +506,25 @@ static rgbRecord theRGBRecords[] =
 };
 static int numTheRGBRecords = 234;
 
+static unsigned char ParseHexadecimal(char digit1, char digit2)
+{
+    unsigned char i1, i2;
+
+    if (digit1 >= 'a')
+        i1 = digit1 - 'a' + 0x0A;
+    else if (digit1 >= 'A')
+        i1 = digit1 - 'A' + 0x0A;
+    else
+        i1 = digit1 - '0';
+    if (digit2 >= 'a')
+        i2 = digit2 - 'a' + 0x0A;
+    else if (digit2 >= 'A')
+        i2 = digit2 - 'A' + 0x0A;
+    else
+        i2 = digit2 - '0';
+    return (0x10 * i1 + i2);
+}
+
 static bool GetRGBFromName(const char *inname, bool *isNone,
                            unsigned char *r, unsigned char*g, unsigned char *b)
 {
@@ -500,19 +534,15 @@ static bool GetRGBFromName(const char *inname, bool *isNone,
     char *name;
     char *grey, *p;
 
-    // #rrggbb are not in database, we parse them directly
-    if ( *inname == '#' && strlen(inname) == 7 )
+    // Neither #rrggbb nor #rrrrggggbbbb are in database, we parse them directly
+    size_t inname_len = strlen(inname);
+    if ( *inname == '#' && (inname_len == 7 || inname_len == 13))
     {
-        char buf[3];
-        buf[2] = 0;
-        buf[0] = inname[1]; buf[1] = inname[2];
-        *r = (unsigned char) wxHexToDec(buf);
-        buf[0] = inname[3]; buf[1] = inname[4];
-        *g = (unsigned char) wxHexToDec(buf);
-        buf[0] = inname[5]; buf[1] = inname[6];
-        *b = (unsigned char) wxHexToDec(buf);
+        size_t ofs = (inname_len == 7) ? 2 : 4;
+        *r = ParseHexadecimal(inname[1], inname[2]);
+        *g = ParseHexadecimal(inname[1*ofs+1], inname[1*ofs+2]);
+        *b = ParseHexadecimal(inname[2*ofs+1], inname[2*ofs+2]);
         *isNone = FALSE;
-
         return TRUE;
     }
 
@@ -544,41 +574,47 @@ static bool GetRGBFromName(const char *inname, bool *isNone,
         grey[2] = 'a';
 
     // check for special 'none' colour:
+    bool found;
     if ( strcmp(name, "none") == 0 )
     {
         *isNone = TRUE;
-        return TRUE;
+        found = TRUE;
     }
-
-    // binary search:
-    left = 0;
-    right = numTheRGBRecords - 1;
-    do
+    else // not "None"
     {
-        middle = (left + right) / 2;
-        cmp = strcmp(name, theRGBRecords[middle].name);
-        if ( cmp == 0 )
-        {
-            rgbVal = theRGBRecords[middle].rgb;
-            *r = (unsigned char)((rgbVal >> 16) & 0xFF);
-            *g = (unsigned char)((rgbVal >> 8) & 0xFF);
-            *b = (unsigned char)((rgbVal) & 0xFF);
-            *isNone = FALSE;
-            free(name);
-            return TRUE;
-        }
-        else if ( cmp < 0 )
+        found = FALSE;
+
+        // binary search:
+        left = 0;
+        right = numTheRGBRecords - 1;
+        do
         {
-            right = middle - 1;
-        }
-        else
-        {           // > 0
-            left = middle + 1;
-        }
-    } while (left <= right);
+            middle = (left + right) / 2;
+            cmp = strcmp(name, theRGBRecords[middle].name);
+            if ( cmp == 0 )
+            {
+                rgbVal = theRGBRecords[middle].rgb;
+                *r = (unsigned char)((rgbVal >> 16) & 0xFF);
+                *g = (unsigned char)((rgbVal >> 8) & 0xFF);
+                *b = (unsigned char)((rgbVal) & 0xFF);
+                *isNone = FALSE;
+                found = TRUE;
+                break;
+            }
+            else if ( cmp < 0 )
+            {
+                right = middle - 1;
+            }
+            else // cmp > 0
+            {
+                left = middle + 1;
+            }
+        } while (left <= right);
+    }
 
     free(name);
-    return FALSE;
+
+    return found;
 }
 
 static const char *ParseColor(const char *data)
@@ -624,8 +660,8 @@ wxImage wxXPMDecoder::ReadData(const char **xpm_data)
     wxImage img;
     int count;
     unsigned width, height, colors_cnt, chars_per_pixel;
-    unsigned i, j;
-    char key[64];
+    size_t i, j, i_key;
+    wxChar key[64];
     const char *clr_def;
     bool hasMask;
     wxXPMColourMapData *clr_data;
@@ -634,6 +670,7 @@ wxImage wxXPMDecoder::ReadData(const char **xpm_data)
     /*
      *  Read hints and initialize structures:
      */
+     
     count = sscanf(xpm_data[0], "%u %u %u %u",
                    &width, &height, &colors_cnt, &chars_per_pixel);
     if ( count != 4 || width * height * colors_cnt == 0 )
@@ -651,7 +688,7 @@ wxImage wxXPMDecoder::ReadData(const char **xpm_data)
     if ( !img.Ok() ) return img;
 
     img.SetMask(FALSE);
-    key[chars_per_pixel] = '\0';
+    key[chars_per_pixel] = wxT('\0');
     hasMask = FALSE;
     clr_tbl.DeleteContents(TRUE);
 
@@ -660,7 +697,8 @@ wxImage wxXPMDecoder::ReadData(const char **xpm_data)
      */
     for (i = 0; i < colors_cnt; i++)
     {
-        memcpy(key, xpm_data[1 + i], chars_per_pixel);
+        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;
 
@@ -707,9 +745,9 @@ wxImage wxXPMDecoder::ReadData(const char **xpm_data)
     {
         for (i = 0; i < width; i++, img_data += 3)
         {
-            memcpy(key,
-                   xpm_data[1 + colors_cnt + j] + chars_per_pixel * i,
-                   chars_per_pixel);
+            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 )
             {
@@ -727,5 +765,4 @@ wxImage wxXPMDecoder::ReadData(const char **xpm_data)
     return img;
 }
 
-
 #endif // wxUSE_IMAGE && wxUSE_XPM