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      1 /*
      2  * Copyright (C) 2007 Esmertec AG.
      3  * Copyright (C) 2007 The Android Open Source Project
      4  *
      5  * Licensed under the Apache License, Version 2.0 (the "License");
      6  * you may not use this file except in compliance with the License.
      7  * You may obtain a copy of the License at
      8  *
      9  *     http://www.apache.org/licenses/LICENSE-2.0
     10  *
     11  * Unless required by applicable law or agreed to in writing, software
     12  * distributed under the License is distributed on an "AS IS" BASIS,
     13  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     14  * See the License for the specific language governing permissions and
     15  * limitations under the License.
     16  */
     17 
     18 #ifndef WBXML_ENCODER_H
     19 #define WBXML_ENCODER_H
     20 
     21 #include <stdint.h>
     22 #include "wbxml_const.h"
     23 #include "wbxml_stl.h"
     24 
     25 
     26 class WbxmlHandler
     27 {
     28 public:
     29     virtual ~WbxmlHandler() {}
     30     virtual void wbxmlData(const char *data, uint32_t len) = 0;
     31 };
     32 
     33 enum EncoderError {
     34     NO_ERROR = 0,
     35     ERROR_NO_PUBLIC_ID = 1,
     36     ERROR_UNSUPPORTED_DOCTYPE,
     37     ERROR_UNSUPPORTED_TAG,
     38     ERROR_UNSUPPORTED_ATTR,
     39     ERROR_INVALID_DATA,
     40     ERROR_INVALID_INTEGER_VALUE,
     41     ERROR_INVALID_DATETIME_VALUE,
     42     ERROR_INVALID_END_ELEMENT,
     43 };
     44 
     45 class WbxmlEncoder
     46 {
     47 public:
     48     WbxmlEncoder(int publicId):mPublicId(publicId) {}
     49 
     50     virtual ~WbxmlEncoder() {}
     51 
     52     void setWbxmlHandler(WbxmlHandler * handler)
     53     {
     54         mHandler = handler;
     55     }
     56 
     57     virtual EncoderError startElement(const char *name, const char **atts) = 0;
     58     virtual EncoderError characters(const char *chars, int len) = 0;
     59     virtual EncoderError endElement() = 0;
     60 
     61     /**
     62      * Reset the encoder so that it may be used again. The WbxmlHandler is
     63      * NOT cleared by reset().
     64      */
     65     virtual void reset() = 0;
     66 
     67     static bool isXmlWhitespace(int ch);
     68     static bool parseUint(const char * s, int len, uint32_t *res);
     69 
     70 protected:
     71     WbxmlHandler * mHandler;
     72     int mPublicId;
     73 
     74     EncoderError encodeInteger(const char *chars, int len);
     75     EncoderError encodeDatetime(const char *chars, int len);
     76     void encodeInlinedStr(const char *s, int len);
     77     void encodeMbuint(uint32_t i);
     78 
     79     void clearResult()
     80     {
     81         mResult.clear();
     82     }
     83 
     84     void appendResult(int ch)
     85     {
     86         mResult += (char)ch;
     87     }
     88 
     89     void appendResult(const char *s, int len)
     90     {
     91         mResult.append(s, len);
     92     }
     93 
     94     void sendResult();
     95 
     96     /**
     97      * Append a string into the string table, return the index of the string in
     98      * the string table.
     99      */
    100     int appendToStringTable(const char *s);
    101 
    102 private:
    103     string mResult;
    104     vector<string> mStringTable;
    105 };
    106 
    107 #endif
    108 
    109