+/** \brief read ISO2709/MARC record from buffer
+ \param mt handle
+ \param buf ISO2709 buffer of size bsize
+ \param bsize size of buffer (-1 for unlimited size)
+
+ Parses ISO2709 record from supplied buffer
+ Returns > 0 for OK (same as length), -1=ERROR
+*/
+YAZ_EXPORT int yaz_marc_read_iso2709(yaz_marc_t mt,
+ const char *buf, int bsize);
+
+/** \brief read MARC lineformat from stream
+ \param mt handle
+ \param getbyte get one byte handler
+ \param ungetbyte unget one byte handler
+ \param client_data opaque data for handers
+
+ Parses MARC line record from stream
+ Returns > 0 for OK (same as length), -1=ERROR
+*/
+YAZ_EXPORT
+int yaz_marc_read_line(yaz_marc_t mt,
+ int (*getbyte)(void *client_data),
+ void (*ungetbyte)(int b, void *client_data),
+ void *client_data);
+
+#if YAZ_HAVE_XML2
+/** \brief parses MARCXML/MarcXchange record from xmlNode pointer
+ \param mt handle
+ \param ptr is a pointer to root xml node
+
+ Returns 0=OK, -1=ERROR
+*/
+YAZ_EXPORT int yaz_marc_read_xml(yaz_marc_t mt, const xmlNode *ptr);
+#endif
+
+/** \brief writes record in line format
+ \param mt handle
+ \param wrbuf WRBUF for output
+
+ Returns 0=OK, -1=ERROR
+*/
+YAZ_EXPORT int yaz_marc_write_line(yaz_marc_t mt, WRBUF wrbuf);
+
+/** \brief writes record in MARCXML format
+ \param mt handle
+ \param wrbuf WRBUF for output
+
+ Sets leader[9]='a' . Returns 0=OK, -1=ERROR .
+*/
+YAZ_EXPORT int yaz_marc_write_marcxml(yaz_marc_t mt, WRBUF wrbuf);
+
+/** \brief writes record in MarcXchange XML (ISO25577)
+ \param mt handle
+ \param wrbuf WRBUF for output
+ \param format record format (e.g. "MARC21")
+ \param type record type (e.g. Bibliographic)
+
+ Returns 0=OK, -1=ERROR
+*/
+YAZ_EXPORT int yaz_marc_write_marcxchange(yaz_marc_t mt, WRBUF wrbuf,
+ const char *format,
+ const char *type);
+
+/** \brief writes record in ISO2709 format
+ \param mt handle
+ \param wrbuf WRBUF for output
+ Returns 0=OK, -1=ERROR
+*/
+YAZ_EXPORT int yaz_marc_write_iso2709(yaz_marc_t mt, WRBUF wrbuf);
+
+/** \brief writes record in mode - given by yaz_marc_xml mode
+ \param mt handle
+ \param wrbuf WRBUF for output
+ This function calls yaz_marc_write_iso2709, yaz_marc_write_marcxml,
+ etc.. depending on mode given by yaz_marc_xml.
+ Returns 0=OK, -1=ERROR
+*/
+YAZ_EXPORT int yaz_marc_write_mode(yaz_marc_t mt, WRBUF wrbuf);
+
+#if YAZ_HAVE_XML2
+/** \brief writes MARC record as libxml2 tree
+ \param mt handle
+ \param root_ptr pointer to record node
+ \param ns namespace of record (such as "http://www.loc.gov/MARC21/slim")
+ \param format MarcXchange format (NULL for none)
+ \param type MarcXchange format (NULL for none)
+ \retval 0 Creation successful and *root_ptr is "record" node
+ \retval -1 ERROR
+*/
+YAZ_EXPORT
+int yaz_marc_write_xml(yaz_marc_t mt, xmlNode **root_ptr,
+ const char *ns,
+ const char *format,
+ const char *type);
+#endif
+
+/** \brief sets leader spec (for modifying bytes in 24 byte leader)
+ \param mt handle
+ \param leader_spec
+ \retval 0 OK
+ \retval -1 ERROR
+
+ Spec takes form pos=val,pos=val,...
+ where value is either a number (decimal char value) or a
+ string in 'a', e.g. 9='a'
+
+*/
+YAZ_EXPORT int yaz_marc_leader_spec(yaz_marc_t mt, const char *leader_spec);
+
+
+/** \brief sets leader, validates it, and returns important values
+ \param mt handle
+ \param leader of the 24 byte leader to be set
+ \param indicator_length indicator length (returned value)
+ \param identifier_length identifier length (returned value)
+ \param base_address base address (returned value)
+ \param length_data_entry length of data entry (returned value)
+ \param length_starting length of starting
+ \param length_implementation length of implementation defined data
+*/
+YAZ_EXPORT
+void yaz_marc_set_leader(yaz_marc_t mt, const char *leader,
+ int *indicator_length,
+ int *identifier_length,
+ int *base_address,
+ int *length_data_entry,
+ int *length_starting,
+ int *length_implementation);
+
+
+/** \brief adds MARC comment string
+ \param mt handle
+ \param comment comment to be added)
+*/
+YAZ_EXPORT
+void yaz_marc_add_comment(yaz_marc_t mt, char *comment);
+
+/** \brief adds MARC annotation - printf interface
+ \param mt handle
+ \param fmt printf format string
+*/
+YAZ_EXPORT
+void yaz_marc_cprintf(yaz_marc_t mt, const char *fmt, ...);
+
+/** \brief adds subfield to MARC structure
+ \param mt handle
+ \param code_data code data buffer
+ \param code_data_len length of code data
+*/
+YAZ_EXPORT
+void yaz_marc_add_subfield(yaz_marc_t mt,
+ const char *code_data, size_t code_data_len);
+
+
+/** \brief adds controlfield to MARC structure
+ \param mt handle
+ \param tag (e.g. "001"
+ \param data value for this tag
+ \param data_len length of data
+*/
+YAZ_EXPORT
+void yaz_marc_add_controlfield(yaz_marc_t mt, const char *tag,
+ const char *data, size_t data_len);
+
+
+#if YAZ_HAVE_XML2
+/** \brief adds controlfield to MARC structure using xml Nodes
+ \param mt handle
+ \param ptr_tag value of tag (TEXT xmlNode)
+ \param ptr_data value of data (TEXT xmlNode)
+*/
+YAZ_EXPORT
+void yaz_marc_add_controlfield_xml(yaz_marc_t mt, const xmlNode *ptr_tag,
+ const xmlNode *ptr_data);
+#endif
+
+/** \brief adds datafield to MARC structure using strings
+ \param mt handle
+ \param tag value of tag as string
+ \param indicator indicator string
+ \param indicator_len length of indicator string
+*/
+YAZ_EXPORT
+void yaz_marc_add_datafield(yaz_marc_t mt, const char *tag,
+ const char *indicator, size_t indicator_len);
+
+#if YAZ_HAVE_XML2
+/** \brief adds datafield to MARC structure using xml Nodes
+ \param mt handle
+ \param ptr_tag value of tag (TEXT xmlNode)
+ \param indicator indicator string
+ \param indicator_len length of indicator string
+*/
+YAZ_EXPORT
+void yaz_marc_add_datafield_xml(yaz_marc_t mt, const xmlNode *ptr_tag,
+ const char *indicator, size_t indicator_len);
+#endif
+
+/** \brief returns memory for MARC handle
+ \param mt handle
+ \retval NMEM handle for MARC system
+*/
+YAZ_EXPORT
+NMEM yaz_marc_get_nmem(yaz_marc_t mt);
+
+/** \brief clears memory and MARC record
+ \param mt handle
+*/
+YAZ_EXPORT
+void yaz_marc_reset(yaz_marc_t mt);
+
+/** \brief gets debug level for MARC system
+ \param mt handle
+*/
+YAZ_EXPORT
+int yaz_marc_get_debug(yaz_marc_t mt);
+
+/** \brief convert MARC format type to format type(YAZ_MARC_..)
+ \param arg string
+ \returns -1 if arg is not a known format; YAZ_MARC_.. otherwise (OK)
+*/
+YAZ_EXPORT
+int yaz_marc_decode_formatstr(const char *arg);
+
+/** \brief enable writing of MARC XML records using Libxml2
+ \param mt handle
+ \param enable 0=disable, 1=enable
+*/
+YAZ_EXPORT
+void yaz_marc_write_using_libxml2(yaz_marc_t mt, int enable);
+
+/** \brief Performs "pretty" display of OPAC record to WRBUF */
+YAZ_EXPORT void yaz_display_OPAC(WRBUF wrbuf, Z_OPACRecord *r, int flags);
+
+/** \brief Performs "pretty" display of OPAC record to WRBUF using marc_t */
+YAZ_EXPORT void yaz_opac_decode_wrbuf(yaz_marc_t mt, Z_OPACRecord *r, WRBUF wrbuf);
+
+
+/** \brief flushes records
+ \param mt handle
+ \param wr WRBUF for output
+ \retval 0 OK
+ \retval -1 ERROR
+*/
+YAZ_EXPORT int yaz_marc_write_trailer(yaz_marc_t mt, WRBUF wr);
+
+/** \brief enables record collection output
+ \param mt handle
+*/
+YAZ_EXPORT void yaz_marc_enable_collection(yaz_marc_t mt);
+