Module catalog from libxml2

# ## Module catalog from libxml2

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the catalog module implements the support for XML Catalogs and SGML catalogs ## Table of Contents
    #define XML_CATALOGS_NAMESPACE
    #define XML_CATALOG_PI
    Structure xmlCatalog
    struct _xmlCatalog
    The content of this structure is not made public by the API.
    Enum xmlCatalogAllow
    Enum xmlCatalogPrefer
    Typedef xmlCatalog * xmlCatalogPtr
    int	xmlACatalogAdd			(xmlCatalogPtr catal,
    					 const xmlChar * type,
    					 const xmlChar * orig,
    					 const xmlChar * replace)
    void	xmlACatalogDump			(xmlCatalogPtr catal,
    					 FILE * out)
    int	xmlACatalogRemove		(xmlCatalogPtr catal,
    					 const xmlChar * value)
    xmlChar *	xmlACatalogResolve	(xmlCatalogPtr catal,
    					 const xmlChar * pubID,
    					 const xmlChar * sysID)
    xmlChar *	xmlACatalogResolvePublic	(xmlCatalogPtr catal,
    						 const xmlChar * pubID)
    xmlChar *	xmlACatalogResolveSystem	(xmlCatalogPtr catal,
    						 const xmlChar * sysID)
    xmlChar *	xmlACatalogResolveURI	(xmlCatalogPtr catal,
    					 const xmlChar * URI)
    int	xmlCatalogAdd			(const xmlChar * type,
    					 const xmlChar * orig,
    					 const xmlChar * replace)
    void *	xmlCatalogAddLocal		(void * catalogs,
    					 const xmlChar * URL)
    void	xmlCatalogCleanup		(void)
    int	xmlCatalogConvert		(void)
    void	xmlCatalogDump			(FILE * out)
    void	xmlCatalogFreeLocal		(void * catalogs)
    xmlCatalogAllow	xmlCatalogGetDefaults	(void)
    const xmlChar *	xmlCatalogGetPublic	(const xmlChar * pubID)
    const xmlChar *	xmlCatalogGetSystem	(const xmlChar * sysID)
    int	xmlCatalogIsEmpty		(xmlCatalogPtr catal)
    xmlChar *	xmlCatalogLocalResolve	(void * catalogs,
    					 const xmlChar * pubID,
    					 const xmlChar * sysID)
    xmlChar *	xmlCatalogLocalResolveURI	(void * catalogs,
    						 const xmlChar * URI)
    int	xmlCatalogRemove		(const xmlChar * value)
    xmlChar *	xmlCatalogResolve	(const xmlChar * pubID,
    					 const xmlChar * sysID)
    xmlChar *	xmlCatalogResolvePublic	(const xmlChar * pubID)
    xmlChar *	xmlCatalogResolveSystem	(const xmlChar * sysID)
    xmlChar *	xmlCatalogResolveURI	(const xmlChar * URI)
    int	xmlCatalogSetDebug		(int level)
    xmlCatalogPrefer	xmlCatalogSetDefaultPrefer	(xmlCatalogPrefer prefer)
    void	xmlCatalogSetDefaults		(xmlCatalogAllow allow)
    int	xmlConvertSGMLCatalog		(xmlCatalogPtr catal)
    void	xmlFreeCatalog			(xmlCatalogPtr catal)
    void	xmlInitializeCatalog		(void)
    xmlCatalogPtr	xmlLoadACatalog		(const char * filename)
    int	xmlLoadCatalog			(const char * filename)
    void	xmlLoadCatalogs			(const char * pathss)
    xmlCatalogPtr	xmlLoadSGMLSuperCatalog	(const char * filename)
    xmlCatalogPtr	xmlNewCatalog		(int sgml)
    xmlDocPtr	xmlParseCatalogFile	(const char * filename)
## Description ### Macro: XML_CATALOGS_NAMESPACE
    #define XML_CATALOGS_NAMESPACE
The namespace for the XML Catalogs elements. ### Macro: XML_CATALOG_PI
    #define XML_CATALOG_PI
The specific XML Catalog Processing Instuction name. ### Structure xmlCatalog
    Structure xmlCatalog
    struct _xmlCatalog {
    The content of this structure is not made public by the API.
    }
### Enum xmlCatalogAllow
    Enum xmlCatalogAllow {
        XML_CATA_ALLOW_NONE = 0
        XML_CATA_ALLOW_GLOBAL = 1
        XML_CATA_ALLOW_DOCUMENT = 2
        XML_CATA_ALLOW_ALL = 3
    }
### Enum xmlCatalogPrefer
    Enum xmlCatalogPrefer {
        XML_CATA_PREFER_NONE = 0
        XML_CATA_PREFER_PUBLIC = 1
        XML_CATA_PREFER_SYSTEM = 2
    }
### Function: xmlACatalogAdd
    int	xmlACatalogAdd			(xmlCatalogPtr catal,
    					 const xmlChar * type,
    					 const xmlChar * orig,
    					 const xmlChar * replace)
Add an entry in the catalog, it may overwrite existing but different entries.
`catal`: | a Catalog
`type`: | the type of record to add to the catalog
`orig`: | the system, public or prefix to match
`replace`: | the replacement value for the match
`Returns`: | 0 if successful, -1 otherwise
### Function: xmlACatalogDump
    void	xmlACatalogDump			(xmlCatalogPtr catal,
    					 FILE * out)
Free up all the memory associated with catalogs
`catal`: | a Catalog
`out`: | the file.
### Function: xmlACatalogRemove
    int	xmlACatalogRemove		(xmlCatalogPtr catal,
    					 const xmlChar * value)
Remove an entry from the catalog
`catal`: | a Catalog
`value`: | the value to remove
`Returns`: | the number of entries removed if successful, -1 otherwise
### Function: xmlACatalogResolve
    xmlChar *	xmlACatalogResolve	(xmlCatalogPtr catal,
    					 const xmlChar * pubID,
    					 const xmlChar * sysID)
Do a complete resolution lookup of an External Identifier
`catal`: | a Catalog
`pubID`: | the public ID string
`sysID`: | the system ID string
`Returns`: | the URI of the resource or NULL if not found, it must be freed by the caller.
### Function: xmlACatalogResolvePublic
    xmlChar *	xmlACatalogResolvePublic	(xmlCatalogPtr catal,
    						 const xmlChar * pubID)
Try to lookup the system ID associated to a public ID in that catalog
`catal`: | a Catalog
`pubID`: | the public ID string
`Returns`: | the system ID if found or NULL otherwise, the value returned must be freed by the caller.
### Function: xmlACatalogResolveSystem
    xmlChar *	xmlACatalogResolveSystem	(xmlCatalogPtr catal,
    						 const xmlChar * sysID)
Try to lookup the catalog resource for a system ID
`catal`: | a Catalog
`sysID`: | the public ID string
`Returns`: | the system ID if found or NULL otherwise, the value returned must be freed by the caller.
### Function: xmlACatalogResolveURI
    xmlChar *	xmlACatalogResolveURI	(xmlCatalogPtr catal,
    					 const xmlChar * URI)
Do a complete resolution lookup of an URI
`catal`: | a Catalog
`URI`: | the URI
`Returns`: | the URI of the resource or NULL if not found, it must be freed by the caller.
### Function: xmlCatalogAdd
    int	xmlCatalogAdd			(const xmlChar * type,
    					 const xmlChar * orig,
    					 const xmlChar * replace)
Add an entry in the catalog, it may overwrite existing but different entries. If called before any other catalog routine, allows to override the default shared catalog put in place by xmlInitializeCatalog();
`type`: | the type of record to add to the catalog
`orig`: | the system, public or prefix to match
`replace`: | the replacement value for the match
`Returns`: | 0 if successful, -1 otherwise
### Function: xmlCatalogAddLocal
    void *	xmlCatalogAddLocal		(void * catalogs,
    					 const xmlChar * URL)
Add the new entry to the catalog list
`catalogs`: | a document's list of catalogs
`URL`: | the URL to a new local catalog
`Returns`: | the updated list
### Function: xmlCatalogCleanup
    void	xmlCatalogCleanup		(void)
Free up all the memory associated with catalogs ### Function: xmlCatalogConvert
    int	xmlCatalogConvert		(void)
Convert all the SGML catalog entries as XML ones
`Returns`: | the number of entries converted if successful, -1 otherwise
### Function: xmlCatalogDump
    void	xmlCatalogDump			(FILE * out)
Free up all the memory associated with catalogs
`out`: | the file.
### Function: xmlCatalogFreeLocal
    void	xmlCatalogFreeLocal		(void * catalogs)
Free up the memory associated to the catalog list
`catalogs`: | a document's list of catalogs
### Function: xmlCatalogGetDefaults
    xmlCatalogAllow	xmlCatalogGetDefaults	(void)
Used to get the user preference w.r.t. to what catalogs should be accepted
`Returns`: | the current xmlCatalogAllow value
### Function: xmlCatalogGetPublic
    const xmlChar *	xmlCatalogGetPublic	(const xmlChar * pubID)
Try to lookup the system ID associated to a public ID DEPRECATED, use xmlCatalogResolvePublic()
`pubID`: | the public ID string
`Returns`: | the system ID if found or NULL otherwise.
### Function: xmlCatalogGetSystem
    const xmlChar *	xmlCatalogGetSystem	(const xmlChar * sysID)
Try to lookup the system ID associated to a public ID DEPRECATED, use xmlCatalogResolveSystem()
`sysID`: | the system ID string
`Returns`: | the system ID if found or NULL otherwise.
### Function: xmlCatalogIsEmpty
    int	xmlCatalogIsEmpty		(xmlCatalogPtr catal)
Check is a catalog is empty
`catal`: | should this create an SGML catalog
`Returns`: | 1 if the catalog is empty, 0 if not, amd -1 in case of error.
### Function: xmlCatalogLocalResolve
    xmlChar *	xmlCatalogLocalResolve	(void * catalogs,
    					 const xmlChar * pubID,
    					 const xmlChar * sysID)
Do a complete resolution lookup of an External Identifier using a document's private catalog list
`catalogs`: | a document's list of catalogs
`pubID`: | the public ID string
`sysID`: | the system ID string
`Returns`: | the URI of the resource or NULL if not found, it must be freed by the caller.
### Function: xmlCatalogLocalResolveURI
    xmlChar *	xmlCatalogLocalResolveURI	(void * catalogs,
    						 const xmlChar * URI)
Do a complete resolution lookup of an URI using a document's private catalog list
`catalogs`: | a document's list of catalogs
`URI`: | the URI
`Returns`: | the URI of the resource or NULL if not found, it must be freed by the caller.
### Function: xmlCatalogRemove
    int	xmlCatalogRemove		(const xmlChar * value)
Remove an entry from the catalog
`value`: | the value to remove
`Returns`: | the number of entries removed if successful, -1 otherwise
### Function: xmlCatalogResolve
    xmlChar *	xmlCatalogResolve	(const xmlChar * pubID,
    					 const xmlChar * sysID)
Do a complete resolution lookup of an External Identifier
`pubID`: | the public ID string
`sysID`: | the system ID string
`Returns`: | the URI of the resource or NULL if not found, it must be freed by the caller.
### Function: xmlCatalogResolvePublic
    xmlChar *	xmlCatalogResolvePublic	(const xmlChar * pubID)
Try to lookup the system ID associated to a public ID
`pubID`: | the public ID string
`Returns`: | the system ID if found or NULL otherwise, the value returned must be freed by the caller.
### Function: xmlCatalogResolveSystem
    xmlChar *	xmlCatalogResolveSystem	(const xmlChar * sysID)
Try to lookup the catalog resource for a system ID
`sysID`: | the public ID string
`Returns`: | the system ID if found or NULL otherwise, the value returned must be freed by the caller.
### Function: xmlCatalogResolveURI
    xmlChar *	xmlCatalogResolveURI	(const xmlChar * URI)
Do a complete resolution lookup of an URI
`URI`: | the URI
`Returns`: | the URI of the resource or NULL if not found, it must be freed by the caller.
### Function: xmlCatalogSetDebug
    int	xmlCatalogSetDebug		(int level)
Used to set the debug level for catalog operation, 0 disable debugging, 1 enable it
`level`: | the debug level of catalogs required
`Returns`: | the previous value of the catalog debugging level
### Function: xmlCatalogSetDefaultPrefer
    xmlCatalogPrefer	xmlCatalogSetDefaultPrefer	(xmlCatalogPrefer prefer)
Allows to set the preference between public and system for deletion in XML Catalog resolution. C.f. section 4.1.1 of the spec Values accepted are XML_CATA_PREFER_PUBLIC or XML_CATA_PREFER_SYSTEM
`prefer`: | the default preference for delegation
`Returns`: | the previous value of the default preference for delegation
### Function: xmlCatalogSetDefaults
    void	xmlCatalogSetDefaults		(xmlCatalogAllow allow)
Used to set the user preference w.r.t. to what catalogs should be accepted
`allow`: | what catalogs should be accepted
### Function: xmlConvertSGMLCatalog
    int	xmlConvertSGMLCatalog		(xmlCatalogPtr catal)
Convert all the SGML catalog entries as XML ones
`catal`: | the catalog
`Returns`: | the number of entries converted if successful, -1 otherwise
### Function: xmlFreeCatalog
    void	xmlFreeCatalog			(xmlCatalogPtr catal)
Free the memory allocated to a Catalog
`catal`: | a Catalog entry
### Function: xmlInitializeCatalog
    void	xmlInitializeCatalog		(void)
Do the catalog initialization. this function is not thread safe, catalog initialization should preferably be done once at startup ### Function: xmlLoadACatalog
    xmlCatalogPtr	xmlLoadACatalog		(const char * filename)
Load the catalog and build the associated data structures. This can be either an XML Catalog or an SGML Catalog It will recurse in SGML CATALOG entries. On the other hand XML Catalogs are not handled recursively.
`filename`: | a file path
`Returns`: | the catalog parsed or NULL in case of error
### Function: xmlLoadCatalog
    int	xmlLoadCatalog			(const char * filename)
Load the catalog and makes its definitions effective for the default external entity loader. It will recurse in SGML CATALOG entries. this function is not thread safe, catalog initialization should preferably be done once at startup
`filename`: | a file path
`Returns`: | 0 in case of success -1 in case of error
### Function: xmlLoadCatalogs
    void	xmlLoadCatalogs			(const char * pathss)
Load the catalogs and makes their definitions effective for the default external entity loader. this function is not thread safe, catalog initialization should preferably be done once at startup
`pathss`: | a list of directories separated by a colon or a space.
### Function: xmlLoadSGMLSuperCatalog
    xmlCatalogPtr	xmlLoadSGMLSuperCatalog	(const char * filename)
Load an SGML super catalog. It won't expand CATALOG or DELEGATE references. This is only needed for manipulating SGML Super Catalogs like adding and removing CATALOG or DELEGATE entries.
`filename`: | a file path
`Returns`: | the catalog parsed or NULL in case of error
### Function: xmlNewCatalog
    xmlCatalogPtr	xmlNewCatalog		(int sgml)
create a new Catalog.
`sgml`: | should this create an SGML catalog
`Returns`: | the xmlCatalogPtr or NULL in case of error
### Function: xmlParseCatalogFile
    xmlDocPtr	xmlParseCatalogFile	(const char * filename)
parse an XML file and build a tree. It's like xmlParseFile() except it bypass all catalog lookups.
`filename`: | the filename
`Returns`: | the resulting document tree or NULL in case of error
Daniel Veillard