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/**
* @file
*
* @brief Chained hash tables
*
* This module implements the hash table support used in
* various places in the library.
*
* @copyright See Copyright for the status of this software.
*/
#ifndef __XML_HASH_H__
#define __XML_HASH_H__
#include <libxml/xmlversion.h>
#include <libxml/dict.h>
#include <libxml/xmlstring.h>
#ifdef __cplusplus
extern "C" {
#endif
/**
* Hash table mapping strings to pointers
*
* Also supports lookup using two or three strings as key.
*/
typedef struct _xmlHashTable xmlHashTable;
typedef xmlHashTable *xmlHashTablePtr;
/*
* Recent version of gcc produce a warning when a function pointer is assigned
* to an object pointer, or vice versa. The following macro is a dirty hack
* to allow suppression of the warning. If your architecture has function
* pointers which are a different size than a void pointer, there may be some
* serious trouble within the library.
*/
/**
* Macro to do a casting from an object pointer to a
* function pointer without encountering a warning from
* gcc
*
* \#define XML_CAST_FPTR(fptr) (*(void **)(&fptr))
* This macro violated ISO C aliasing rules (gcc4 on s390 broke)
* so it is disabled now
*
* @param fptr pointer to a function
*/
#define XML_CAST_FPTR(fptr) fptr
/*
* function types:
*/
/**
* Callback to free data from a hash.
*
* @param payload the data in the hash
* @param name the name associated
*/
typedef void (*xmlHashDeallocator)(void *payload, const xmlChar *name);
/**
* Callback to copy data from a hash.
*
* @param payload the data in the hash
* @param name the name associated
* @returns a copy of the data or NULL in case of error.
*/
typedef void *(*xmlHashCopier)(void *payload, const xmlChar *name);
/**
* Callback when scanning data in a hash with the simple scanner.
*
* @param payload the data in the hash
* @param data extra scanner data
* @param name the name associated
*/
typedef void (*xmlHashScanner)(void *payload, void *data, const xmlChar *name);
/**
* Callback when scanning data in a hash with the full scanner.
*
* @param payload the data in the hash
* @param data extra scanner data
* @param name the name associated
* @param name2 the second name associated
* @param name3 the third name associated
*/
typedef void (*xmlHashScannerFull)(void *payload, void *data,
const xmlChar *name, const xmlChar *name2,
const xmlChar *name3);
/*
* Constructor and destructor.
*/
XMLPUBFUN xmlHashTable *
xmlHashCreate (int size);
XMLPUBFUN xmlHashTable *
xmlHashCreateDict (int size,
xmlDict *dict);
XMLPUBFUN void
xmlHashFree (xmlHashTable *hash,
xmlHashDeallocator dealloc);
XMLPUBFUN void
xmlHashDefaultDeallocator(void *entry,
const xmlChar *name);
/*
* Add a new entry to the hash table.
*/
XMLPUBFUN int
xmlHashAdd (xmlHashTable *hash,
const xmlChar *name,
void *userdata);
XMLPUBFUN int
xmlHashAddEntry (xmlHashTable *hash,
const xmlChar *name,
void *userdata);
XMLPUBFUN int
xmlHashUpdateEntry (xmlHashTable *hash,
const xmlChar *name,
void *userdata,
xmlHashDeallocator dealloc);
XMLPUBFUN int
xmlHashAdd2 (xmlHashTable *hash,
const xmlChar *name,
const xmlChar *name2,
void *userdata);
XMLPUBFUN int
xmlHashAddEntry2 (xmlHashTable *hash,
const xmlChar *name,
const xmlChar *name2,
void *userdata);
XMLPUBFUN int
xmlHashUpdateEntry2 (xmlHashTable *hash,
const xmlChar *name,
const xmlChar *name2,
void *userdata,
xmlHashDeallocator dealloc);
XMLPUBFUN int
xmlHashAdd3 (xmlHashTable *hash,
const xmlChar *name,
const xmlChar *name2,
const xmlChar *name3,
void *userdata);
XMLPUBFUN int
xmlHashAddEntry3 (xmlHashTable *hash,
const xmlChar *name,
const xmlChar *name2,
const xmlChar *name3,
void *userdata);
XMLPUBFUN int
xmlHashUpdateEntry3 (xmlHashTable *hash,
const xmlChar *name,
const xmlChar *name2,
const xmlChar *name3,
void *userdata,
xmlHashDeallocator dealloc);
/*
* Remove an entry from the hash table.
*/
XMLPUBFUN int
xmlHashRemoveEntry (xmlHashTable *hash,
const xmlChar *name,
xmlHashDeallocator dealloc);
XMLPUBFUN int
xmlHashRemoveEntry2 (xmlHashTable *hash,
const xmlChar *name,
const xmlChar *name2,
xmlHashDeallocator dealloc);
XMLPUBFUN int
xmlHashRemoveEntry3 (xmlHashTable *hash,
const xmlChar *name,
const xmlChar *name2,
const xmlChar *name3,
xmlHashDeallocator dealloc);
/*
* Retrieve the payload.
*/
XMLPUBFUN void *
xmlHashLookup (xmlHashTable *hash,
const xmlChar *name);
XMLPUBFUN void *
xmlHashLookup2 (xmlHashTable *hash,
const xmlChar *name,
const xmlChar *name2);
XMLPUBFUN void *
xmlHashLookup3 (xmlHashTable *hash,
const xmlChar *name,
const xmlChar *name2,
const xmlChar *name3);
XMLPUBFUN void *
xmlHashQLookup (xmlHashTable *hash,
const xmlChar *prefix,
const xmlChar *name);
XMLPUBFUN void *
xmlHashQLookup2 (xmlHashTable *hash,
const xmlChar *prefix,
const xmlChar *name,
const xmlChar *prefix2,
const xmlChar *name2);
XMLPUBFUN void *
xmlHashQLookup3 (xmlHashTable *hash,
const xmlChar *prefix,
const xmlChar *name,
const xmlChar *prefix2,
const xmlChar *name2,
const xmlChar *prefix3,
const xmlChar *name3);
/*
* Helpers.
*/
XMLPUBFUN xmlHashTable *
xmlHashCopySafe (xmlHashTable *hash,
xmlHashCopier copy,
xmlHashDeallocator dealloc);
XMLPUBFUN xmlHashTable *
xmlHashCopy (xmlHashTable *hash,
xmlHashCopier copy);
XMLPUBFUN int
xmlHashSize (xmlHashTable *hash);
XMLPUBFUN void
xmlHashScan (xmlHashTable *hash,
xmlHashScanner scan,
void *data);
XMLPUBFUN void
xmlHashScan3 (xmlHashTable *hash,
const xmlChar *name,
const xmlChar *name2,
const xmlChar *name3,
xmlHashScanner scan,
void *data);
XMLPUBFUN void
xmlHashScanFull (xmlHashTable *hash,
xmlHashScannerFull scan,
void *data);
XMLPUBFUN void
xmlHashScanFull3 (xmlHashTable *hash,
const xmlChar *name,
const xmlChar *name2,
const xmlChar *name3,
xmlHashScannerFull scan,
void *data);
#ifdef __cplusplus
}
#endif
#endif /* ! __XML_HASH_H__ */