Handle broken FNT files which don't have a trailing NULL byte

ChangeLog

@@ -1,3 +1,17 @@
+2004-03-31  Werner Lemberg  <wl@gnu.org>
+
+	Handle broken FNT files which don't have a trailing NULL byte
+	in the face name string.
+
+	* src/winfnt/winfnt.h (FNT_FontRec): New member `family_name'.
+	* src/winfnt/winfnt.c (fnt_font_done): Free font->family_name.
+	(FNT_Face_Init): Append a final zero byte to the font face name.
+
+2004-03-30  Werner Lemberg  <wl@gnu.org>
+
+	* src/sfnt/ttload.c (tt_face_load_sfnt_header): Fix change from
+	2004-03-19.
+
 2004-03-27  Werner Lemberg  <wl@gnu.org>
 
 	* src/base/descrip.mms (OBJS): Add ftbbox.obj.

src/sfnt/ttload.c

@@ -357,11 +357,6 @@
            FT_READ_LONG( format_tag )                             )
         goto Exit;
     }
-    else if ( face_index > 0 )
-    {
-      error = SFNT_Err_Bad_Argument;
-      goto Exit;
-    }
 
     /* the format tag was read, now check the rest of the header */
     sfnt->format_tag = format_tag;
@@ -376,8 +371,13 @@
     {
       FT_TRACE2(( "tt_face_load_sfnt_header: file is not SFNT!\n" ));
       error = SFNT_Err_Unknown_File_Format;
+      goto Exit;
     }
 
+    /* disallow face index values > 0 for non-TTC files */
+    if ( format_tag != TTAG_ttcf && face_index > 0 )
+      error = SFNT_Err_Bad_Argument;
+
   Exit:
     return error;
   }

src/winfonts/winfnt.c

@@ -121,6 +121,7 @@
 
     if ( font->fnt_frame )
       FT_FRAME_RELEASE( font->fnt_frame );
+    FT_FREE( font->family_name );
 
     FT_FREE( font );
     face->font = 0;
@@ -434,8 +435,9 @@
     /* we now need to fill the root FT_Face fields */
     /* with relevant information                   */
     {
-      FT_Face   root = FT_FACE( face );
-      FNT_Font  font = face->font;
+      FT_Face     root = FT_FACE( face );
+      FNT_Font    font = face->font;
+      FT_PtrDist  family_size;
 
 
       root->face_flags = FT_FACE_FLAG_FIXED_SIZES |
@@ -506,8 +508,22 @@
       root->num_glyphs = font->header.last_char -
                            font->header.first_char + 1 + 1;
 
-      root->family_name = (FT_String*)font->fnt_frame +
-                            font->header.face_name_offset;
+      /* Some broken fonts don't delimit the face name with a final */
+      /* NULL byte -- the frame is erroneously one byte too small.  */
+      /* We thus allocate one more byte, setting it explicitly to   */
+      /* zero.                                                      */
+      family_size = font->header.file_size - font->header.face_name_offset;
+      if ( FT_ALLOC( font->family_name, family_size + 1 ) )
+        goto Fail;
+      FT_MEM_COPY( font->family_name,
+                   font->fnt_frame + font->header.face_name_offset,
+                   family_size );
+      font->family_name[family_size] = '\0';
+      if ( FT_REALLOC( font->family_name,
+                       family_size,
+                       ft_strlen( font->family_name ) + 1 ) )
+        goto Fail;
+      root->family_name = font->family_name;
       root->style_name  = (char *)"Regular";
 
       if ( root->style_flags & FT_STYLE_FLAG_BOLD )
@@ -520,10 +536,10 @@
       else if ( root->style_flags & FT_STYLE_FLAG_ITALIC )
         root->style_name = (char *)"Italic";
     }
+    goto Exit;
 
   Fail:
-    if ( error )
-      FNT_Face_Done( face );
+    FNT_Face_Done( face );
 
   Exit:
     return error;

src/winfonts/winfnt.h

@@ -4,7 +4,7 @@
 /*                                                                         */
 /*    FreeType font driver for Windows FNT/FON files                       */
 /*                                                                         */
-/*  Copyright 1996-2001, 2002, 2003 by                                     */
+/*  Copyright 1996-2001, 2002, 2003, 2004 by                               */
 /*  David Turner, Robert Wilhelm, and Werner Lemberg.                      */
 /*                                                                         */
 /*  This file is part of the FreeType project, and may only be used,       */
@@ -79,6 +79,7 @@ FT_BEGIN_HEADER
 
     FT_Byte*             fnt_frame;
     FT_ULong             fnt_size;
+    FT_String*           family_name;
 
   } FNT_FontRec, *FNT_Font;