/** 

 * XML Security Library (http://www.aleksey.com/xmlsec).

 *

 * List of pointers.

 *

 * This is free software; see Copyright file in the source

 * distribution for preciese wording.

 * 

 * Copyright (C) 2002-2003 Aleksey Sanin <aleksey@aleksey.com>

 * Portion Copyright © 2009 Nokia Corporation and/or its subsidiary(-ies). All rights reserved. 

 */

#include "xmlsec_globals.h"

#include <stdlib.h>

#include <string.h>

#include <libxml2_tree.h>

#include <libxml2_globals.h>

#include "xmlsec_xmlsec.h"

#include "xmlsec_list.h"

#include "xmlsec_errors.h"

static int		xmlSecPtrListEnsureSize			(xmlSecPtrListPtr list,

								 xmlSecSize size);

static xmlSecAllocMode gAllocMode = xmlSecAllocModeDouble;

static xmlSecSize gInitialSize = 64;

/** 

 * xmlSecPtrListSetDefaultAllocMode:

 * @defAllocMode:	the new default memory allocation mode.

 * @defInitialSize:	the new default minimal initial size.

 *

 * Sets new default allocation mode and minimal initial list size.

 */

EXPORT_C

void 

xmlSecPtrListSetDefaultAllocMode(xmlSecAllocMode defAllocMode, xmlSecSize defInitialSize) {

    xmlSecAssert(defInitialSize > 0);

    gAllocMode = defAllocMode;

    gInitialSize = defInitialSize;

}

/**

 * xmlSecPtrListCreate:

 * @id:			the list klass.

 * 

 * Creates new list object. Caller is responsible for freeing returned list

 * by calling #xmlSecPtrListDestroy function.

 *

 * Returns pointer to newly allocated list or NULL if an error occurs.

 */

EXPORT_C

xmlSecPtrListPtr 

xmlSecPtrListCreate(xmlSecPtrListId id) {

    xmlSecPtrListPtr list;

    int ret;

    xmlSecAssert2(id != xmlSecPtrListIdUnknown, NULL);

    /* Allocate a new xmlSecPtrList and fill the fields. */

    list = (xmlSecPtrListPtr)xmlMalloc(sizeof(xmlSecPtrList));

    if(list == NULL) {

	xmlSecError(XMLSEC_ERRORS_HERE,

		    xmlSecErrorsSafeString(xmlSecPtrListKlassGetName(id)),

		    NULL,

		    XMLSEC_ERRORS_R_MALLOC_FAILED,

		    "sizeof(xmlSecPtrList)=%d", 

		    sizeof(xmlSecPtrList));

	return(NULL);

    }

    ret = xmlSecPtrListInitialize(list, id);

    if(ret < 0) {

	xmlSecError(XMLSEC_ERRORS_HERE,

		    xmlSecErrorsSafeString(xmlSecPtrListKlassGetName(id)),

		    "xmlSecPtrListInitialize",

		    XMLSEC_ERRORS_R_XMLSEC_FAILED,

		    XMLSEC_ERRORS_NO_MESSAGE);

	xmlFree(list);

	return(NULL);

    }

    return(list);    

}

/**

 * xmlSecPtrListDestroy:

 * @list:		the pointer to list.

 *

 * Destroys @list created with #xmlSecPtrListCreate function.

 */

EXPORT_C

void 

xmlSecPtrListDestroy(xmlSecPtrListPtr list) {

    xmlSecAssert(xmlSecPtrListIsValid(list));

    xmlSecPtrListFinalize(list);

    xmlFree(list);

}

/**

 * xmlSecPtrListInitialize:

 * @list:		the pointer to list.

 * @id:			the list klass.

 *

 * Initializes the list of given klass. Caller is responsible 

 * for cleaning up by calling #xmlSecPtrListFinalize function.

 *

 * Returns 0 on success or a negative value if an error occurs.

 */

EXPORT_C

int 

xmlSecPtrListInitialize(xmlSecPtrListPtr list, xmlSecPtrListId id) {

    xmlSecAssert2(id != xmlSecPtrListIdUnknown, -1);

    xmlSecAssert2(list != NULL, -1);

    memset(list, 0, sizeof(xmlSecPtrList));    

    list->id = id;

    list->allocMode = gAllocMode;

    return(0);

}

/**

 * xmlSecPtrListFinalize:

 * @list:		the pointer to list.

 *  

 * Cleans up the list initialized with #xmlSecPtrListInitialize

 * function.

 */

EXPORT_C

void

xmlSecPtrListFinalize(xmlSecPtrListPtr list) {

    xmlSecAssert(xmlSecPtrListIsValid(list));

    xmlSecPtrListEmpty(list);

    memset(list, 0, sizeof(xmlSecPtrList));    

}

/**

 * xmlSecPtrListEmpty:

 * @list:		the pointer to list.

 *

 * Remove all items from @list (if any).

 */

EXPORT_C

void 

xmlSecPtrListEmpty(xmlSecPtrListPtr list) {

    xmlSecAssert(xmlSecPtrListIsValid(list));

    if(list->id->destroyItem != NULL) {

	xmlSecSize pos;

	for(pos = 0; pos < list->use; ++pos) {

	    xmlSecAssert(list->data != NULL);

	    if(list->data[pos] != NULL) {

		list->id->destroyItem(list->data[pos]);

	    }

	}

    }

    if(list->max > 0) {

	xmlSecAssert(list->data != NULL);

	memset(list->data, 0, sizeof(xmlSecPtr) * list->use);

	xmlFree(list->data);

    }

    list->max = list->use = 0;

    list->data = NULL;

}

/**

 * xmlSecPtrListCopy:

 * @dst:		the pointer to destination list.

 * @src:		the pointer to source list.

 *

 * Copies @src list items to @dst list using #duplicateItem method

 * of the list klass. If #duplicateItem method is NULL then 

 * we jsut copy pointers to items.

 *

 * Returns 0 on success or a negative value if an error occurs.

 */

EXPORT_C

int

xmlSecPtrListCopy(xmlSecPtrListPtr dst, xmlSecPtrListPtr src) {

    xmlSecSize i;

    int ret;

    xmlSecAssert2(xmlSecPtrListIsValid(dst), -1);

    xmlSecAssert2(xmlSecPtrListIsValid(src), -1);

    xmlSecAssert2(dst->id == src->id, -1);

    /* allocate memory */

    ret = xmlSecPtrListEnsureSize(dst, dst->use + src->use);

    if(ret < 0) {

	xmlSecError(XMLSEC_ERRORS_HERE,

		    xmlSecErrorsSafeString(xmlSecPtrListGetName(src)),

		    "xmlSecPtrListEnsureSize",

		    XMLSEC_ERRORS_R_XMLSEC_FAILED,

		    "size=%d", src->use);

	return(-1);

    }

    /* copy one item after another */    

    for(i = 0; i < src->use; ++i, ++dst->use) {

	xmlSecAssert2(src->data != NULL, -1);

	xmlSecAssert2(dst->data != NULL, -1);

	if((dst->id->duplicateItem != NULL) && (src->data[i] != NULL)) {

	    dst->data[dst->use] = dst->id->duplicateItem(src->data[i]);

	    if(dst->data[dst->use] == NULL) {

		xmlSecError(XMLSEC_ERRORS_HERE,

			    xmlSecErrorsSafeString(xmlSecPtrListGetName(src)),

			    "duplicateItem",

			    XMLSEC_ERRORS_R_XMLSEC_FAILED,

			    XMLSEC_ERRORS_NO_MESSAGE);

		return(-1);

	    }

	} else {

	    dst->data[dst->use] = src->data[i];

	}

    }

    return(0);

}

/**

 * xmlSecPtrListDuplicate:

 * @list:		the pointer to list.

 *  

 * Creates a new copy of @list and all its items.

 *

 * Returns pointer to newly allocated list or NULL if an error occurs.

 */

EXPORT_C

xmlSecPtrListPtr 

xmlSecPtrListDuplicate(xmlSecPtrListPtr list) {

    xmlSecPtrListPtr newList;

    int ret;

    xmlSecAssert2(xmlSecPtrListIsValid(list), NULL);

    newList = xmlSecPtrListCreate(list->id);

    if(newList == NULL) {

	xmlSecError(XMLSEC_ERRORS_HERE,

		    xmlSecErrorsSafeString(xmlSecPtrListGetName(list)),

		    "xmlSecPtrListCreate",

		    XMLSEC_ERRORS_R_XMLSEC_FAILED,

		    XMLSEC_ERRORS_NO_MESSAGE);

	return(NULL);

    }

    ret = xmlSecPtrListCopy(newList, list);

    if(ret < 0) {

	xmlSecError(XMLSEC_ERRORS_HERE,

		    xmlSecErrorsSafeString(xmlSecPtrListGetName(list)),

		    "xmlSecPtrListCopy",

		    XMLSEC_ERRORS_R_XMLSEC_FAILED,

		    XMLSEC_ERRORS_NO_MESSAGE);

	xmlSecPtrListDestroy(newList);

	return(NULL);

    }

    return(newList);

}

/**

 * xmlSecPtrListGetSize:

 * @list:		the pointer to list.

 *

 * Gets list size.

 * 

 * Returns the number of itmes in @list.

 */

EXPORT_C

xmlSecSize	

xmlSecPtrListGetSize(xmlSecPtrListPtr list) {

    xmlSecAssert2(xmlSecPtrListIsValid(list), 0);

    return(list->use);

}

/**

 * xmlSecPtrListGetItem:

 * @list:		the pointer to list.

 * @pos:		the item position.

 *

 * Gets item from the list.

 *

 * Returns the list item at position @pos or NULL if @pos is greater

 * than the number of items in the list or an error occurs.

 */

EXPORT_C

xmlSecPtr 

xmlSecPtrListGetItem(xmlSecPtrListPtr list, xmlSecSize pos) {

    xmlSecAssert2(xmlSecPtrListIsValid(list), NULL);

    xmlSecAssert2(list->data != NULL, NULL);

    xmlSecAssert2(pos < list->use, NULL);

    return(list->data[pos]);

}

/**

 * xmlSecPtrListAdd:

 * @list:		the pointer to list.

 * @item:		the item.

 *

 * Adds @item to the end of the @list.

 *

 * Returns 0 on success or a negative value if an error occurs.

 */

EXPORT_C

int 

xmlSecPtrListAdd(xmlSecPtrListPtr list, xmlSecPtr item) {

    int ret;

    xmlSecAssert2(xmlSecPtrListIsValid(list), -1);

    ret = xmlSecPtrListEnsureSize(list, list->use + 1);

    if(ret < 0) {

	xmlSecError(XMLSEC_ERRORS_HERE,

		    xmlSecErrorsSafeString(xmlSecPtrListGetName(list)),

		    "xmlSecPtrListAdd",

		    XMLSEC_ERRORS_R_XMLSEC_FAILED,

		    "size=%d", list->use + 1);

	return(-1);

    }

    list->data[list->use++] = item;

    return(0);

}

/**

 * xmlSecPtrListSet:

 * @list:		the pointer to list.

 * @item:		the item.

 * @pos:		the pos.

 *

 * Sets the value of list item at position @pos. The old value

 * is destroyed.

 *

 * Returns 0 on success or a negative value if an error occurs.

 */

EXPORT_C

int 

xmlSecPtrListSet(xmlSecPtrListPtr list, xmlSecPtr item, xmlSecSize pos) {

    xmlSecAssert2(xmlSecPtrListIsValid(list), -1);

    xmlSecAssert2(list->data != NULL, -1);

    xmlSecAssert2(pos < list->use, -1);

    if((list->id->destroyItem != NULL) && (list->data[pos] != NULL)) {

	list->id->destroyItem(list->data[pos]);

    }

    list->data[pos] = item;

    return(0);

}

/**

 * xmlSecPtrListRemove:

 * @list:		the pointer to list.

 * @pos:		the position.

 *

 * Destroys list item at the position @pos and sets it value to NULL.

 *

 * Returns 0 on success or a negative value if an error occurs.

 */

EXPORT_C

int 

xmlSecPtrListRemove(xmlSecPtrListPtr list, xmlSecSize pos) {

    xmlSecAssert2(xmlSecPtrListIsValid(list), -1);

    xmlSecAssert2(list->data != NULL, -1);

    xmlSecAssert2(pos < list->use, -1);

    if((list->id->destroyItem != NULL) && (list->data[pos] != NULL)) {

	list->id->destroyItem(list->data[pos]);

    }

    list->data[pos] = NULL;

    if(pos == list->use - 1) {

	--list->use;

    }

    return(0);

}

/**

 * xmlSecPtrListDebugDump:

 * @list:		the pointer to list.

 * @output:		the pointer to output FILE.

 *

 * Prints debug information about @list to the @output.

 */

EXPORT_C

void 

xmlSecPtrListDebugDump(xmlSecPtrListPtr list, FILE* output) {

    xmlSecAssert(xmlSecPtrListIsValid(list));

    xmlSecAssert(output != NULL);

    fprintf(output, "=== list size: %d\n", list->use);    

    if(list->id->debugDumpItem != NULL) {

	xmlSecSize pos;

	for(pos = 0; pos < list->use; ++pos) {

	    xmlSecAssert(list->data != NULL);

	    if(list->data[pos] != NULL) {

		list->id->debugDumpItem(list->data[pos], output);

	    }

	}	

    }

}

/**

 * xmlSecPtrListDebugXmlDump:

 * @list:		the pointer to list.

 * @output:		the pointer to output FILE.

 *

 * Prints debug information about @list to the @output in XML format.

 */

EXPORT_C

void 

xmlSecPtrListDebugXmlDump(xmlSecPtrListPtr list, FILE* output) {

    xmlSecAssert(xmlSecPtrListIsValid(list));

    xmlSecAssert(output != NULL);

    fprintf(output, "<List size=\"%d\">\n", list->use);    

    if(list->id->debugXmlDumpItem != NULL) {

	xmlSecSize pos;

	for(pos = 0; pos < list->use; ++pos) {

	    xmlSecAssert(list->data != NULL);

	    if(list->data[pos] != NULL) {

		list->id->debugXmlDumpItem(list->data[pos], output);

	    }

	}	

    }

    fprintf(output, "</List>\n");    

}

static int 

xmlSecPtrListEnsureSize(xmlSecPtrListPtr list, xmlSecSize size) {

    xmlSecPtr* newData;

    xmlSecSize newSize = 0;

    xmlSecAssert2(xmlSecPtrListIsValid(list), -1);

    if(size < list->max) {

	return(0);

    }

    switch(list->allocMode) {

	case xmlSecAllocModeExact:

	    newSize = size + 8;

	    break;

	case xmlSecAllocModeDouble:

	    newSize = 2 * size + 32;

	    break;

    }

    if(newSize < gInitialSize) {

	newSize = gInitialSize;

    }

    if(list->data != NULL) {

    	newData = (xmlSecPtr*)xmlRealloc(list->data, sizeof(xmlSecPtr) * newSize);

    } else {

    	newData = (xmlSecPtr*)xmlMalloc(sizeof(xmlSecPtr) * newSize);

    }

    if(newData == NULL) {

	xmlSecError(XMLSEC_ERRORS_HERE,

		    xmlSecErrorsSafeString(xmlSecPtrListGetName(list)),

		    NULL,

		    XMLSEC_ERRORS_R_MALLOC_FAILED,

		    "sizeof(xmlSecPtr)*%d=%d", 

		    newSize, sizeof(xmlSecPtr) * newSize);

	return(-1);

    }

    list->data = newData;

    list->max = newSize;

    return(0);

}

/***********************************************************************

 *

 * strings list

 *

 **********************************************************************/

static xmlSecPtr 	xmlSecStringListDuplicateItem		(xmlSecPtr ptr);

static void		xmlSecStringListDestroyItem		(xmlSecPtr ptr);

static xmlSecPtrListKlass xmlSecStringListKlass = {

    BAD_CAST "strings-list",

    xmlSecStringListDuplicateItem,		/* xmlSecPtrDuplicateItemMethod duplicateItem; */

    xmlSecStringListDestroyItem,		/* xmlSecPtrDestroyItemMethod destroyItem; */

    NULL,					/* xmlSecPtrDebugDumpItemMethod debugDumpItem; */

    NULL,					/* xmlSecPtrDebugDumpItemMethod debugXmlDumpItem; */

};

/**

 * xmlSecStringListGetKlass:

 * 

 * The strins list class.

 *

 * Returns strings list klass.

 */

EXPORT_C

xmlSecPtrListId 

xmlSecStringListGetKlass(void) {

    return(&xmlSecStringListKlass);

}

static xmlSecPtr 

xmlSecStringListDuplicateItem(xmlSecPtr ptr) {

    xmlSecAssert2(ptr != NULL, NULL);

    return(xmlStrdup((xmlChar*)ptr));

}

static void 

xmlSecStringListDestroyItem(xmlSecPtr ptr) {

    xmlSecAssert(ptr != NULL);

    xmlFree(ptr);

}