/*
 * Copyright (c) 2003, 2004 X/IO Labs, xiolabs.com.
 * Copyright (c) 2003-2017 Lev Walkin <vlm@lionet.info>. All rights reserved.
 * Redistribution and modifications are permitted subject to BSD license.
 */
#ifndef _XER_SUPPORT_H_
#define _XER_SUPPORT_H_

#include <asn_system.h> /* Platform-specific types */

#ifdef __cplusplus
extern "C" {
#endif

/*
 * Types of data transferred to the application.
 */
typedef enum {
  PXML_TEXT,    /* Plain text between XML tags. */
  PXML_TAG,     /* A tag, starting with '<'. */
  PXML_COMMENT, /* An XML comment, including "<!--" and "-->". */
  /*
   * The following chunk types are reported if the chunk
   * terminates the specified XML element.
   */
  PXML_TAG_END,    /* Tag ended */
  PXML_COMMENT_END /* Comment ended */
} pxml_chunk_type_e;

/*
 * Callback function that is called by the parser when parsed data is
 * available. The _opaque is the pointer to a field containing opaque user
 * data specified in pxml_create() call. The chunk type is _type and the text
 * data is the piece of buffer identified by _bufid (as supplied to
 * pxml_feed() call) starting at offset _offset and of _size bytes size.
 * The chunk is NOT '\0'-terminated.
 */
typedef int(pxml_callback_f)(
    pxml_chunk_type_e _type, const void* _chunk_data, size_t _chunk_size,
    void* _key);

/*
 * Parse the given buffer as it were a chunk of XML data.
 * Invoke the specified callback each time the meaninful data is found.
 * This function returns number of bytes consumed from the bufer.
 * It will always be lesser than or equal to the specified _size.
 * The next invocation of this function must account the difference.
 */
ssize_t pxml_parse(
    int* _stateContext, const void* _buf, size_t _size, pxml_callback_f* cb,
    void* _key);

#ifdef __cplusplus
}
#endif

#endif /* _XER_SUPPORT_H_ */
