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/*
WARNING: This file was generated by dkct.
Changes you make here will be lost if dkct is run again!
You should modify the original source and run dkct on it.
Original source: dk4membuf.ctr
*/
/*
Copyright (C) 2015-2017, Dirk Krause
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
* Redistributions of source code must retain the above copyright notice,
this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above opyright notice,
this list of conditions and the following disclaimer in the documentation
and/or other materials provided with the distribution.
* Neither the name of the author nor the names of contributors may be used
to endorse or promote products derived from this software without specific
prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS''
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED.
IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY
DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/** @file dk4membuf.c The dk4membuf module.
*/
#line 95 "dk4membuf.ctr"
#include "dk4membuf.h"
#include "dk4mem.h"
#include "dk4maasz.h"
#line 103 "dk4membuf.ctr"
static
void
dk4membuf_cell_close(dk4_membuf_cell_t *mcptr)
{
if (NULL != mcptr) {
dk4mem_release(mcptr->buf);
mcptr->next = NULL;
mcptr->max = mcptr->used = 0;
dk4mem_free(mcptr);
}
}
static
dk4_membuf_cell_t *
dk4membuf_cell_open(size_t sz, dk4_er_t *erp)
{
dk4_er_t er;
dk4_membuf_cell_t *back = NULL;
size_t nb;
/* Ensure number of bytes is a multiple of the chunk size.
*/
nb = sz / DK4MEMBUF_CHUNK_SIZE;
if (0 != (sz % DK4MEMBUF_CHUNK_SIZE)) { nb++; }
dk4error_init(&er);
nb = dk4ma_size_t_mul(nb, (size_t)(DK4MEMBUF_CHUNK_SIZE), &er);
if (0 != er.ec) { nb = sz; }
/* Allocate
*/
back = dk4mem_new(dk4_membuf_cell_t,1,erp);
if (NULL != back) {
back->next = NULL;
back->max = nb;
back->used = 0;
back->buf = dk4mem_new(char,nb,erp);
if (NULL == back->buf) {
dk4mem_free(back);
back = NULL;
}
}
return back;
}
dk4_membuf_t *
dk4membuf_open(dk4_er_t *erp)
{
dk4_membuf_t *back = NULL;
back = dk4mem_new(dk4_membuf_t,1,erp);
if (NULL != back) {
back->he = 0;
back->last = NULL;
back->first = dk4membuf_cell_open(DK4MEMBUF_CHUNK_SIZE, erp);
if (NULL != back->first) {
back->last = back->first;
} else {
dk4mem_free(back);
back = NULL;
}
}
return back;
}
void
dk4membuf_close(dk4_membuf_t *mbptr)
{
dk4_membuf_cell_t *pc;
dk4_membuf_cell_t *pn;
if (NULL != mbptr) {
pc = mbptr->first;
while (NULL != pc) {
pn = pc->next;
dk4membuf_cell_close(pc);
pc = pn;
}
dk4mem_free(mbptr);
}
}
int
dk4membuf_store(dk4_membuf_t *mbptr, const void *src, size_t sz, dk4_er_t *erp)
{
dk4_membuf_cell_t *pc = NULL;
dk4_membuf_cell_t *pn = NULL;
const char *psrc = NULL;
size_t bl = 0;
int back = 0;
if ((NULL != mbptr) && (NULL != src) && (0 < sz)) {
/* Initialize variables.
*/
back = 1;
pc = mbptr->last;
psrc = (const char *)src;
/* Attempt to fill current cell.
*/
if (pc->max > pc->used) {
bl = pc->max - pc->used;
if (sz < bl) { bl = sz; }
DK4_MEMCPY(&((pc->buf)[pc->used]), psrc, bl);
pc->used += bl;
sz -= bl;
psrc = &(psrc[bl]);
}
/* Use new cell if necessary.
*/
if (0 < sz) {
back = 0;
pn = dk4membuf_cell_open(sz, erp);
if (NULL != pn) {
pc->next = pn;
mbptr->last = pn;
DK4_MEMCPY(pn->buf, psrc, sz);
back = 1;
pn->used = sz;
} else {
mbptr->he = 1;
}
}
} else {
dk4error_set_simple_error_code(erp, DK4_E_INVALID_ARGUMENTS);
}
return back;
}
int
dk4membuf_size(size_t *szptr, dk4_membuf_t *mbptr, dk4_er_t *erp)
{
dk4_er_t er;
dk4_membuf_cell_t *cp = NULL;
size_t result = (size_t)0U;
int back = 0;
if ((NULL != szptr) && (NULL != mbptr)) {
back = 1;
cp = mbptr->first;
dk4error_init(&er);
while (NULL != cp) {
result = dk4ma_size_t_add(result, cp->used, &er);
cp = cp->next;
}
if (DK4_E_NONE == er.ec) {
back = 1;
*szptr = result;
}
} else {
dk4error_set_simple_error_code(erp, DK4_E_INVALID_ARGUMENTS);
}
return back;
}
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