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/*
* CVector.c
* CVector
*
* Created by Herbert J. Bernstein on 11/28/08.
* Copyright 2008 Herbert J. Bernstein. All rights reserved.
*
*/
/**********************************************************************
* *
* YOU MAY REDISTRIBUTE THE CVector API UNDER THE TERMS OF THE LGPL *
* *
**********************************************************************/
/************************* LGPL NOTICES *******************************
* *
* This library is free software; you can redistribute it and/or *
* modify it under the terms of the GNU Lesser General Public *
* License as published by the Free Software Foundation; either *
* version 2.1 of the License, or (at your option) any later version. *
* *
* This library is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU *
* Lesser General Public License for more details. *
* *
* You should have received a copy of the GNU Lesser General Public *
* License along with this library; if not, write to the Free *
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, *
* MA 02110-1301 USA *
* *
**********************************************************************/
#ifdef __cplusplus
extern "C" {
#endif
#ifdef USE_LOCAL_HEADERS
#include "CVector.h"
#else
#include <CVector.h>
#endif
/* CVectorCreate -- create a generic vector */
int CVectorCreate(CVectorHandle CVECTOR_FAR * vectorhandle, const size_t elementsize, const size_t capacity) {
size_t cap = capacity;
if (vectorhandle==NULL) { return CVECTOR_BAD_ARGUMENT; }
*vectorhandle = (CVectorHandle)CVECTOR_MALLOC(sizeof(CVector));
if (*vectorhandle==NULL) {
return CVECTOR_MALLOC_FAILED;
}
(*vectorhandle)->size = 0;
(*vectorhandle)->flags = 0;
(*vectorhandle)->capacity = 0;
(*vectorhandle)->elementsize = elementsize;
if (!cap) { cap = 10; }
(*vectorhandle)->array = (void CVECTOR_FAR *)CVECTOR_MALLOC(cap*elementsize);
if ((*vectorhandle)->array) {
(*vectorhandle)->capacity = cap;
return 0;
}
CVECTOR_FREE(*vectorhandle);
*vectorhandle = NULL;
return CVECTOR_MALLOC_FAILED;
}
/* CVectorAddElement -- add an element to a generic vector
equivalent to vector::push_back */
int CVectorAddElement(const CVectorHandle vectorhandle, const void CVECTOR_FAR * element) {
size_t newcap;
int errorcode;
if (vectorhandle==NULL) { return CVECTOR_BAD_ARGUMENT; }
if ( (vectorhandle->flags&CVECTOR_FLAGS_NO_RESIZE) ) { return CVECTOR_NO_RESIZE; }
if (vectorhandle->size >= vectorhandle->capacity) {
newcap = vectorhandle->capacity*2;
if (newcap < 1) { newcap = 1; }
errorcode = CVectorSetCapacity (vectorhandle, newcap);
if (errorcode != 0) {
newcap = vectorhandle->capacity+(size_t)(vectorhandle->capacity>>2);
if (newcap < 1) { newcap = 1; }
errorcode = CVectorSetCapacity (vectorhandle, newcap);
if (errorcode != 0) { return errorcode; }
}
}
CVECTOR_MEMMOVE(((char CVECTOR_FAR *)(vectorhandle->array))+vectorhandle->size*vectorhandle->elementsize,
(const char CVECTOR_FAR *)element, vectorhandle->elementsize);
vectorhandle->size ++;
return 0;
}
/* CVectorGetElement -- get a copy of an element from a generic vector */
int CVectorGetElement(const CVectorHandle vectorhandle, void CVECTOR_FAR * element, const size_t index) {
if (vectorhandle==NULL) { return CVECTOR_BAD_ARGUMENT; }
if (index < vectorhandle->size) {
CVECTOR_MEMMOVE((char *)element,((char *)(vectorhandle->array))+index*vectorhandle->elementsize,
vectorhandle->elementsize);
return 0;
} else {
return CVECTOR_NOT_FOUND;
}
}
/* CVectorGetElementptr -- get a pointer to an element from a generic vector */
int CVectorGetElementptr(const CVectorHandle vectorhandle, void CVECTOR_FAR ** elementptr, const size_t index) {
if (vectorhandle==NULL) { return CVECTOR_BAD_ARGUMENT; }
if (index < vectorhandle->size) {
*elementptr = (void CVECTOR_FAR*)(((char *)(vectorhandle->array))+index*vectorhandle->elementsize);
vectorhandle->flags |= CVECTOR_FLAGS_NO_RELOCATION;
return 0;
} else {
return CVECTOR_NOT_FOUND;
}
}
/* CVectorSetElement -- set a copy of an element into a generic vector */
int CVectorSetElement(const CVectorHandle vectorhandle, const void CVECTOR_FAR * element, const size_t index) {
size_t newcap;
int errorcode;
if (vectorhandle==NULL) { return CVECTOR_BAD_ARGUMENT; }
if (index >= vectorhandle->capacity) {
newcap = index+vectorhandle->capacity+1;
errorcode = CVectorSetCapacity(vectorhandle, newcap);
if (errorcode != 0 ) {
newcap = index*1.2;
if (newcap < index+128) { newcap = index+128; }
errorcode = CVectorSetCapacity(vectorhandle, newcap);
if (errorcode != 0) { return errorcode; }
}
}
if (index < vectorhandle->capacity) {
CVECTOR_MEMMOVE(((char *)(vectorhandle->array))+index*vectorhandle->elementsize,(char *)element,
vectorhandle->elementsize);
if (index >= vectorhandle->size) { vectorhandle->size = index+1; }
return 0;
} else {
return CVECTOR_NOT_FOUND;
}
}
/* CVectorRemoveElement -- remove an element from a generic vector */
/* keeps elements 0 -- index-1, discards element index
moves elements index+1 through vectorhandle->size-1
into element index through vectorhandle->size-2
i.e. moves characters (index+1)*(vectorhandle->elementsize)
through (vectorhandle->size)*(vectorhandle->elementsize)-1
to index*(vectorhandle->elementsize)
*/
int CVectorRemoveElement(const CVectorHandle vectorhandle, const size_t index) {
if (vectorhandle==NULL) { return CVECTOR_BAD_ARGUMENT; }
if (vectorhandle->flags&CVECTOR_FLAGS_NO_RELOCATION) { return CVECTOR_NO_RELOCATION; }
if (index >= vectorhandle->size) { return CVECTOR_NOT_FOUND; }
if (index == vectorhandle->size-1) {
vectorhandle->size--;
return 0;
}
CVECTOR_MEMMOVE((char *)vectorhandle->array+index*(vectorhandle->elementsize),
(char *)vectorhandle->array+(index+1)*(vectorhandle->elementsize),
(vectorhandle->size-1-index)*(vectorhandle->elementsize));
vectorhandle->size--;
return 0;
}
/* CVectorClear -- clear a generic vector */
int CVectorClear(const CVectorHandle vectorhandle) {
if (vectorhandle==NULL) { return CVECTOR_BAD_ARGUMENT; }
if (vectorhandle->flags & CVECTOR_FLAGS_NO_RESIZE) { return CVECTOR_NO_RESIZE; }
vectorhandle->size = 0;
return 0;
}
/* CVectorFree -- remove a generic vector */
int CVectorFree(CVectorHandle CVECTOR_FAR * vectorhandle) {
if (vectorhandle==NULL) { return CVECTOR_BAD_ARGUMENT; }
if (*vectorhandle) {
if ((*vectorhandle)->flags & CVECTOR_FLAGS_NO_RESIZE) { return CVECTOR_NO_RESIZE; }
if ((*vectorhandle)->flags & CVECTOR_FLAGS_NO_RELOCATION) { return CVECTOR_NO_RELOCATION; }
if ((*vectorhandle)->array) {
CVECTOR_FREE((*vectorhandle)->array);
}
CVECTOR_FREE(*vectorhandle);
}
*vectorhandle = 0;
return 0;
}
/* CVectorGetCapacity - function to return the CVector capacity */
int CVectorGetCapacity(const CVectorHandle vectorhandle, size_t CVECTOR_FAR * capacity) {
if ((vectorhandle==NULL)||!(capacity)) { return CVECTOR_BAD_ARGUMENT; }
*capacity = vectorhandle->capacity;
return 0;
}
/* CVectorGetSize - function to return the CVector size */
int CVectorGetSize(const CVectorHandle vectorhandle, size_t CVECTOR_FAR * size) {
if ((vectorhandle==NULL)||!(size)) { return CVECTOR_BAD_ARGUMENT; }
*size = vectorhandle->size;
return 0;
}
/* CVectorGetFlags - function to return the CVector flags */
int CVectorGetFlags(const CVectorHandle vectorhandle, unsigned int CVECTOR_FAR * flags) {
if ((vectorhandle==NULL)||!(flags)) { return CVECTOR_BAD_ARGUMENT; }
*flags = vectorhandle->flags;
return 0;
}
/* CVectorSetCapacity - function to set the CVector capacity */
int CVectorSetCapacity(const CVectorHandle vectorhandle, const size_t capacity) {
void CVECTOR_FAR * temparray;
if ((vectorhandle==NULL) || capacity < vectorhandle->size) { return CVECTOR_BAD_ARGUMENT; }
if (capacity == vectorhandle->capacity) { return 0; }
if (vectorhandle->flags&CVECTOR_FLAGS_NO_RELOCATION) { return CVECTOR_NO_RELOCATION; }
if (capacity) {
temparray = CVECTOR_MALLOC(capacity*vectorhandle->elementsize);
if (!temparray) { return CVECTOR_MALLOC_FAILED; }
if (vectorhandle->size) {
CVECTOR_MEMMOVE((char *)temparray, (char *)vectorhandle->array, vectorhandle->size*vectorhandle->elementsize);
}
CVECTOR_FREE(vectorhandle->array);
} else {
temparray = NULL;
}
vectorhandle->array = temparray;
vectorhandle->capacity = capacity;
return 0;
}
/* CVectorSetSize - function to set the CVector size */
int CVectorSetSize(const CVectorHandle vectorhandle, const size_t size) {
int errorcode;
if ((vectorhandle==NULL) ) { return CVECTOR_BAD_ARGUMENT; }
if (size == vectorhandle->size) { return 0; }
if ((vectorhandle->flags & CVECTOR_FLAGS_NO_RESIZE)) { return CVECTOR_NO_RESIZE; }
if ( size > vectorhandle->capacity ) {
if ((vectorhandle->flags & CVECTOR_FLAGS_NO_RELOCATION) ) { return CVECTOR_NO_RELOCATION; }
errorcode = CVectorSetCapacity(vectorhandle,size);
if (errorcode != 0) { return errorcode; }
}
if ( size <= vectorhandle->capacity ) {
if (size > vectorhandle->size) {
CVECTOR_MEMSET(((char *)vectorhandle->array)+(vectorhandle->size)*(vectorhandle->elementsize),
0, (vectorhandle->size-size)*(vectorhandle->elementsize));
}
vectorhandle->size = size;
}
return 0;
}
/* CVectorSetFags - function to set the CVector flags */
int CVectorSetFlags(const CVectorHandle vectorhandle, const unsigned int flags) {
if ((vectorhandle==NULL) ) { return CVECTOR_BAD_ARGUMENT; }
vectorhandle->flags = flags;
return 0;
}
#ifdef __cplusplus
}
#endif
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