PDFBOX-5920: check whether the name exists in PDType1CFont.getWidth(), as suggested by Andreas Lehmkühler

git-svn-id: https://svn.apache.org/repos/asf/pdfbox/trunk@1922920 13f79535-47bb-0310-9956-ffa450edef68

Author: THausherr

pdfbox/src/main/java/org/apache/pdfbox/pdmodel/font/PDType1CFont.java

@@ -424,6 +424,12 @@ public float getStringWidth(String string) throws IOException
         {
             int codePoint = string.codePointAt(i);
             String name = getGlyphList().codePointToName(codePoint);
+            if (!cffFont.hasGlyph(string))
+            {
+                throw new IllegalArgumentException(
+                    String.format("U+%04X ('%s') is not available in font %s",
+                                  codePoint, name, getName()));
+            }
             width += cffFont.getType1CharString(name).getWidth();
         }
         return width;