Handle long strings

src/libprs500/ebooks/lrf/html/convert_from.py

@@ -717,7 +717,14 @@ class HTMLConverter(object):
         @param css: A dict
         '''
         src = tag.string if hasattr(tag, 'string') else tag
+        if len(src) > 32767:
+            pos = 0
+            while pos < len(src):
+                self.add_text(src[pos:pos+32767], css, pseudo_css, force_span_use)
+                pos += 32767
+            return
         src = src.replace('\r\n', '\n').replace('\r', '\n')
+        
         if pseudo_css.has_key('first-letter') and len(src) > 1:
             src = src.lstrip()
             f = src[0]

src/libprs500/ebooks/lrf/pylrs/pylrf.py

@@ -69,10 +69,15 @@ PYLRF_VERSION = "1.0"
 #   anyway.
 #
 
+class LrfError(Exception):
+    pass
+
 def writeByte(f, byte):
     f.write(struct.pack("<B", byte))
 
 def writeWord(f, word):
+    if int(word) > 65535:
+        raise LrfError('Cannot encode a number greater than 65535 in a word.')
     f.write(struct.pack("<H", int(word)))
 
 def writeSignedWord(f, sword):
@@ -112,7 +117,10 @@ def writeUnicode(f, string, encoding):
         string = string.decode(encoding)
 
     string = string.encode("utf-16-le")
-    writeWord(f, len(string))
+    length = len(string)
+    if length > 65535:
+        raise LrfError('Cannot write strings longer than 65535 characters.')
+    writeWord(f, length)
     writeString(f, string)
 
 def writeRaw(f, string, encoding):   
@@ -327,11 +335,6 @@ TAG_INFO = dict(
 
 
 
-class LrfError(Exception):
-    pass
-
-
-
 class ObjectTableEntry(object):
     def __init__(self, objId, offset, size):
         self.objId = objId