/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright 2021 Mike Becker, Olaf Wintermann All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* 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 HOLDER 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.
*/
#include "cx/utils.h"
#define CX_STREAM_BCOPY_BUF_SIZE 8192
#define CX_STREAM_COPY_BUF_SIZE 1024
size_t cx_stream_bncopy(
void *src,
void *dest,
cx_read_func rfnc,
cx_write_func wfnc,
char *buf,
size_t bufsize,
size_t n
) {
if (n == 0) {
return 0;
}
char *lbuf;
size_t ncp = 0;
if (buf) {
if (bufsize == 0) return 0;
lbuf = buf;
} else {
if (bufsize == 0) bufsize = CX_STREAM_BCOPY_BUF_SIZE;
lbuf = malloc(bufsize);
if (lbuf == NULL) {
return 0;
}
}
size_t r;
size_t rn = bufsize > n ? n : bufsize;
while ((r = rfnc(lbuf, 1, rn, src)) != 0) {
r = wfnc(lbuf, 1, r, dest);
ncp += r;
n -= r;
rn = bufsize > n ? n : bufsize;
if (r == 0 || n == 0) {
break;
}
}
if (lbuf != buf) {
free(lbuf);
}
return ncp;
}
size_t cx_stream_ncopy(
void *src,
void *dest,
cx_read_func rfnc,
cx_write_func wfnc,
size_t n
) {
char buf[CX_STREAM_COPY_BUF_SIZE];
return cx_stream_bncopy(src, dest, rfnc, wfnc,
buf, CX_STREAM_COPY_BUF_SIZE, n);
}
#ifndef CX_SZMUL_BUILTIN
#include "szmul.c"
#endif