Module entities from libxml2

# ## Module entities from libxml2

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this module provides some of the entity API needed for the parser and applications. ## Table of Contents
    Structure xmlEntitiesTable
    struct _xmlHashTable
    The content of this structure is not made public by the API.
    Typedef xmlEntitiesTable * xmlEntitiesTablePtr
    Enum xmlEntityType
    xmlEntityPtr	xmlAddDocEntity		(xmlDocPtr doc,
    					 const xmlChar * name,
    					 int type,
    					 const xmlChar * ExternalID,
    					 const xmlChar * SystemID,
    					 const xmlChar * content)
    xmlEntityPtr	xmlAddDtdEntity		(xmlDocPtr doc,
    					 const xmlChar * name,
    					 int type,
    					 const xmlChar * ExternalID,
    					 const xmlChar * SystemID,
    					 const xmlChar * content)
    void	xmlCleanupPredefinedEntities	(void)
    xmlEntitiesTablePtr	xmlCopyEntitiesTable	(xmlEntitiesTablePtr table)
    xmlEntitiesTablePtr	xmlCreateEntitiesTable	(void)
    void	xmlDumpEntitiesTable		(xmlBufferPtr buf,
    					 xmlEntitiesTablePtr table)
    void	xmlDumpEntityDecl		(xmlBufferPtr buf,
    					 xmlEntityPtr ent)
    const xmlChar *	xmlEncodeEntities	(xmlDocPtr doc,
    					 const xmlChar * input)
    xmlChar *	xmlEncodeEntitiesReentrant	(xmlDocPtr doc,
    						 const xmlChar * input)
    xmlChar *	xmlEncodeSpecialChars	(xmlDocPtr doc,
    					 const xmlChar * input)
    void	xmlFreeEntitiesTable		(xmlEntitiesTablePtr table)
    xmlEntityPtr	xmlGetDocEntity		(xmlDocPtr doc,
    					 const xmlChar * name)
    xmlEntityPtr	xmlGetDtdEntity		(xmlDocPtr doc,
    					 const xmlChar * name)
    xmlEntityPtr	xmlGetParameterEntity	(xmlDocPtr doc,
    					 const xmlChar * name)
    xmlEntityPtr	xmlGetPredefinedEntity	(const xmlChar * name)
    void	xmlInitializePredefinedEntities	(void)
    xmlEntityPtr	xmlNewEntity		(xmlDocPtr doc,
    					 const xmlChar * name,
    					 int type,
    					 const xmlChar * ExternalID,
    					 const xmlChar * SystemID,
    					 const xmlChar * content)
## Description ### Structure xmlEntitiesTable
    Structure xmlEntitiesTable
    struct _xmlHashTable {
    The content of this structure is not made public by the API.
    }
### Enum xmlEntityType
    Enum xmlEntityType {
        XML_INTERNAL_GENERAL_ENTITY = 1
        XML_EXTERNAL_GENERAL_PARSED_ENTITY = 2
        XML_EXTERNAL_GENERAL_UNPARSED_ENTITY = 3
        XML_INTERNAL_PARAMETER_ENTITY = 4
        XML_EXTERNAL_PARAMETER_ENTITY = 5
        XML_INTERNAL_PREDEFINED_ENTITY = 6
    }
### Function: xmlAddDocEntity
    xmlEntityPtr	xmlAddDocEntity		(xmlDocPtr doc,
    					 const xmlChar * name,
    					 int type,
    					 const xmlChar * ExternalID,
    					 const xmlChar * SystemID,
    					 const xmlChar * content)
Register a new entity for this document.
`doc`: | the document
`name`: | the entity name
`type`: | the entity type XML_xxx_yyy_ENTITY
`ExternalID`: | the entity external ID if available
`SystemID`: | the entity system ID if available
`content`: | the entity content
`Returns`: | a pointer to the entity or NULL in case of error
### Function: xmlAddDtdEntity
    xmlEntityPtr	xmlAddDtdEntity		(xmlDocPtr doc,
    					 const xmlChar * name,
    					 int type,
    					 const xmlChar * ExternalID,
    					 const xmlChar * SystemID,
    					 const xmlChar * content)
Register a new entity for this document DTD external subset.
`doc`: | the document
`name`: | the entity name
`type`: | the entity type XML_xxx_yyy_ENTITY
`ExternalID`: | the entity external ID if available
`SystemID`: | the entity system ID if available
`content`: | the entity content
`Returns`: | a pointer to the entity or NULL in case of error
### Function: xmlCleanupPredefinedEntities
    void	xmlCleanupPredefinedEntities	(void)
Cleanup up the predefined entities table. Deprecated call ### Function: xmlCopyEntitiesTable
    xmlEntitiesTablePtr	xmlCopyEntitiesTable	(xmlEntitiesTablePtr table)
Build a copy of an entity table.
`table`: | An entity table
`Returns`: | the new xmlEntitiesTablePtr or NULL in case of error.
### Function: xmlCreateEntitiesTable
    xmlEntitiesTablePtr	xmlCreateEntitiesTable	(void)
create and initialize an empty entities hash table. This really doesn't make sense and should be deprecated
`Returns`: | the xmlEntitiesTablePtr just created or NULL in case of error.
### Function: xmlDumpEntitiesTable
    void	xmlDumpEntitiesTable		(xmlBufferPtr buf,
    					 xmlEntitiesTablePtr table)
This will dump the content of the entity table as an XML DTD definition
`buf`: | An XML buffer.
`table`: | An entity table
### Function: xmlDumpEntityDecl
    void	xmlDumpEntityDecl		(xmlBufferPtr buf,
    					 xmlEntityPtr ent)
This will dump the content of the entity table as an XML DTD definition
`buf`: | An XML buffer.
`ent`: | An entity table
### Function: xmlEncodeEntities
    const xmlChar *	xmlEncodeEntities	(xmlDocPtr doc,
    					 const xmlChar * input)
TODO: remove xmlEncodeEntities, once we are not afraid of breaking binary compatibility People must migrate their code to xmlEncodeEntitiesReentrant ! This routine will issue a warning when encountered.
`doc`: | the document containing the string
`input`: | A string to convert to XML.
`Returns`: | NULL
### Function: xmlEncodeEntitiesReentrant
    xmlChar *	xmlEncodeEntitiesReentrant	(xmlDocPtr doc,
    						 const xmlChar * input)
Do a global encoding of a string, replacing the predefined entities and non ASCII values with their entities and CharRef counterparts. Contrary to xmlEncodeEntities, this routine is reentrant, and result must be deallocated.
`doc`: | the document containing the string
`input`: | A string to convert to XML.
`Returns`: | A newly allocated string with the substitution done.
### Function: xmlEncodeSpecialChars
    xmlChar *	xmlEncodeSpecialChars	(xmlDocPtr doc,
    					 const xmlChar * input)
Do a global encoding of a string, replacing the predefined entities this routine is reentrant, and result must be deallocated.
`doc`: | the document containing the string
`input`: | A string to convert to XML.
`Returns`: | A newly allocated string with the substitution done.
### Function: xmlFreeEntitiesTable
    void	xmlFreeEntitiesTable		(xmlEntitiesTablePtr table)
Deallocate the memory used by an entities hash table.
`table`: | An entity table
### Function: xmlGetDocEntity
    xmlEntityPtr	xmlGetDocEntity		(xmlDocPtr doc,
    					 const xmlChar * name)
Do an entity lookup in the document entity hash table and
`doc`: | the document referencing the entity
`name`: | the entity name
`Returns`: | the corresponding entity, otherwise a lookup is done in the predefined entities too. Returns A pointer to the entity structure or NULL if not found.
### Function: xmlGetDtdEntity
    xmlEntityPtr	xmlGetDtdEntity		(xmlDocPtr doc,
    					 const xmlChar * name)
Do an entity lookup in the DTD entity hash table and
`doc`: | the document referencing the entity
`name`: | the entity name
`Returns`: | the corresponding entity, if found. Note: the first argument is the document node, not the DTD node. Returns A pointer to the entity structure or NULL if not found.
### Function: xmlGetParameterEntity
    xmlEntityPtr	xmlGetParameterEntity	(xmlDocPtr doc,
    					 const xmlChar * name)
Do an entity lookup in the internal and external subsets and
`doc`: | the document referencing the entity
`name`: | the entity name
`Returns`: | the corresponding parameter entity, if found. Returns A pointer to the entity structure or NULL if not found.
### Function: xmlGetPredefinedEntity
    xmlEntityPtr	xmlGetPredefinedEntity	(const xmlChar * name)
Check whether this name is an predefined entity.
`name`: | the entity name
`Returns`: | NULL if not, otherwise the entity
### Function: xmlInitializePredefinedEntities
    void	xmlInitializePredefinedEntities	(void)
Set up the predefined entities. Deprecated call ### Function: xmlNewEntity
    xmlEntityPtr	xmlNewEntity		(xmlDocPtr doc,
    					 const xmlChar * name,
    					 int type,
    					 const xmlChar * ExternalID,
    					 const xmlChar * SystemID,
    					 const xmlChar * content)
Create a new entity, this differs from xmlAddDocEntity() that if the document is NULL or has no internal subset defined, then an unlinked entity structure will be returned, it is then the responsability of the caller to link it to the document later or free it when not needed anymore.
`doc`: | the document
`name`: | the entity name
`type`: | the entity type XML_xxx_yyy_ENTITY
`ExternalID`: | the entity external ID if available
`SystemID`: | the entity system ID if available
`content`: | the entity content
`Returns`: | a pointer to the entity or NULL in case of error
Daniel Veillard