File:
[ELWIX - Embedded LightWeight unIX -] /
libaitio /
src /
bufio.c
Revision
1.9:
download - view:
text,
annotated -
select for diffs -
revision graph
Sat Feb 8 22:06:17 2014 UTC (10 years, 6 months ago) by
misho
Branches:
MAIN
CVS tags:
io7_3,
io7_2,
io7_1,
io7_0,
IO7_2,
IO7_1,
IO7_0,
IO6_9,
HEAD
version 6.9
/*************************************************************************
* (C) 2011 AITNET ltd - Sofia/Bulgaria - <misho@aitnet.org>
* by Michael Pounov <misho@elwix.org>
*
* $Author: misho $
* $Id: bufio.c,v 1.9 2014/02/08 22:06:17 misho Exp $
*
**************************************************************************
The ELWIX and AITNET software is distributed under the following
terms:
All of the documentation and software included in the ELWIX and AITNET
Releases is copyrighted by ELWIX - Sofia/Bulgaria <info@elwix.org>
Copyright 2004 - 2014
by Michael Pounov <misho@elwix.org>. 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.
3. All advertising materials mentioning features or use of this software
must display the following acknowledgement:
This product includes software developed by Michael Pounov <misho@elwix.org>
ELWIX - Embedded LightWeight unIX and its contributors.
4. Neither the name of AITNET nor the names of its contributors
may be used to endorse or promote products derived from this software
without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY AITNET 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 REGENTS 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 "global.h"
static void
unmap_cf(struct tagBufIO *buf)
{
if (buf)
munmap(buf->buf_base, buf->buf_size);
}
static int
cf_(struct tagBufIO *buf)
{
if (!buf) {
io_SetErr(EINVAL, "Invalid arguments ...");
return -1;
}
if (buf->buf_mode == BUFIO_MODE_INFINIT)
e_free(buf->buf_base);
else if (buf->buf_unmap)
buf->buf_unmap(buf);
e_free(buf);
return 0;
}
#ifdef __NetBSD__
static off_t
sf_lim(struct tagBufIO *buf, off_t pos, int w)
#else
static fpos_t
sf_lim(struct tagBufIO *buf, fpos_t pos, int w)
#endif
{
if (!buf)
goto err;
switch (w) {
case SEEK_SET:
if (buf->buf_size < pos || pos < 0)
goto err;
buf->buf_offset = pos;
break;
case SEEK_CUR:
if (buf->buf_size < (buf->buf_offset + pos) || (buf->buf_offset + pos) < 0)
goto err;
buf->buf_offset += pos;
break;
case SEEK_END:
if (buf->buf_size < (buf->buf_size + pos) || (buf->buf_size + pos) < 0)
goto err;
buf->buf_offset = buf->buf_size + pos;
break;
default:
goto err;
}
return buf->buf_offset;
err:
io_SetErr(EINVAL, "Invalid arguments ...");
return -1;
}
static int
rf_lim(struct tagBufIO *buf, char *dat, int siz)
{
if (!buf || !dat) {
io_SetErr(EINVAL, "Invalid arguments ...");
return -1;
}
if (buf->buf_offset + siz > buf->buf_size)
siz = buf->buf_size - buf->buf_offset;
memcpy(dat, buf->buf_base + buf->buf_offset, siz);
buf->buf_offset += siz;
return siz;
}
static int
wf_lim(struct tagBufIO *buf, const char *dat, int siz)
{
if (!buf || !dat) {
io_SetErr(EINVAL, "Invalid arguments ...");
return -1;
}
if (buf->buf_offset + siz > buf->buf_size)
siz = buf->buf_size - buf->buf_offset;
memcpy(buf->buf_base + buf->buf_offset, dat, siz);
buf->buf_offset += siz;
return siz;
}
#ifdef __NetBSD__
static off_t
sf_inf(struct tagBufIO *buf, off_t pos, int w)
#else
static fpos_t
sf_inf(struct tagBufIO *buf, fpos_t pos, int w)
#endif
{
void *b;
if (!buf)
goto err;
switch (w) {
case SEEK_SET:
if (pos < 0)
goto err;
if (buf->buf_size < pos) {
b = e_realloc(buf->buf_base, pos);
if (!b) {
LOGERR;
return -1;
} else {
buf->buf_base = b;
memset(buf->buf_base + buf->buf_size, 0, pos - buf->buf_size);
buf->buf_size = pos;
}
}
buf->buf_offset = pos;
break;
case SEEK_CUR:
if ((buf->buf_offset + pos) < 0)
goto err;
if (buf->buf_size < (buf->buf_offset + pos)) {
b = e_realloc(buf->buf_base, buf->buf_offset + pos);
if (!b) {
LOGERR;
return -1;
} else {
buf->buf_base = b;
memset(buf->buf_base + buf->buf_size, 0,
buf->buf_offset + pos - buf->buf_size);
buf->buf_size = buf->buf_offset + pos;
}
}
buf->buf_offset += pos;
break;
case SEEK_END:
if ((buf->buf_size + pos) < 0)
goto err;
if (buf->buf_size < (buf->buf_size + pos)) {
b = e_realloc(buf->buf_base, buf->buf_size + pos);
if (!b) {
LOGERR;
return -1;
} else {
buf->buf_base = b;
memset(buf->buf_base + buf->buf_size, 0, pos);
buf->buf_size += pos;
buf->buf_offset = buf->buf_size;
}
} else
buf->buf_offset = buf->buf_size + pos;
break;
default:
goto err;
}
return buf->buf_offset;
err:
io_SetErr(EINVAL, "Invalid arguments ...");
return -1;
}
static int
wf_inf(struct tagBufIO *buf, const char *dat, int siz)
{
void *b;
if (!buf || !dat) {
io_SetErr(EINVAL, "Invalid arguments ...");
return -1;
}
if (buf->buf_offset + siz > buf->buf_size) {
b = e_realloc(buf->buf_base, buf->buf_offset + siz);
if (!b) {
LOGERR;
return -1;
} else {
buf->buf_base = b;
memset(buf->buf_base + buf->buf_size, 0,
buf->buf_offset + siz - buf->buf_size);
buf->buf_size = buf->buf_offset + siz;
}
}
memcpy(buf->buf_base + buf->buf_offset, dat, siz);
buf->buf_offset += siz;
return siz;
}
/*
* io_fmemopen() - File buffered stream operations over memory block
*
* @base = Base address of memory block, if =NULL Infinit length(auto-grow)
* @basesize = Size of memory block
* return: NULL error or !=NULL Opened file resource
*/
FILE *
io_fmemopen(void ** __restrict base, off_t basesize)
{
FILE *f = NULL;
struct tagBufIO *buf;
if (!base) {
io_SetErr(EINVAL, "Invalid base argument ...");
return NULL;
}
buf = e_malloc(sizeof(struct tagBufIO));
if (!buf) {
LOGERR;
return NULL;
} else
memset(buf, 0, sizeof(struct tagBufIO));
if (!*base) {
*base = e_malloc(basesize);
if (!*base) {
LOGERR;
e_free(buf);
return NULL;
} else
memset(*base, 0, basesize);
buf->buf_mode = BUFIO_MODE_INFINIT;
} else
buf->buf_mode = BUFIO_MODE_LIMIT;
buf->buf_base = *base;
buf->buf_size = basesize;
#ifdef __NetBSD__
if (buf->buf_mode == BUFIO_MODE_INFINIT)
f = funopen(buf, (int (*)(void *, char *, int)) rf_lim,
(int (*)(void *, char const *, int)) wf_inf,
(off_t (*)(void *, off_t, int)) sf_inf,
(int (*)(void *)) cf_);
else
f = funopen(buf, (int (*)(void *, char *, int)) rf_lim,
(int (*)(void *, char const *, int)) wf_lim,
(off_t (*)(void *, off_t, int)) sf_lim,
(int (*)(void *)) cf_);
#else
if (buf->buf_mode == BUFIO_MODE_INFINIT)
f = funopen(buf, (int (*)(void *, char *, int)) rf_lim,
(int (*)(void *, char const *, int)) wf_inf,
(fpos_t (*)(void *, fpos_t, int)) sf_inf,
(int (*)(void *)) cf_);
else
f = funopen(buf, (int (*)(void *, char *, int)) rf_lim,
(int (*)(void *, char const *, int)) wf_lim,
(fpos_t (*)(void *, fpos_t, int)) sf_lim,
(int (*)(void *)) cf_);
#endif
if (!f) {
LOGERR;
if (buf->buf_mode == BUFIO_MODE_INFINIT) {
e_free(*base);
*base = NULL;
}
e_free(buf);
return NULL;
}
return f;
}
/*
* io_fmapopen() - File buffered stream operations over MMAP block
*
* @csFile = Filename for MMAP, if =NULL private MMAP block
* @mode = File open mode
* @perm = If file not exists will be created with this access permissions
* @prot = MMAP protection
* @flags = MMAP mode flags
* @offset = Map from file offset, if csFile==NULL then this is size of MMAP private block
* return: NULL error or !=NULL Opened file resource
*/
FILE *
io_fmapopen(const char *csFile, int mode, int perm, int prot, int flags, off_t offset)
{
FILE *f;
struct tagBufIO *buf;
void *base;
off_t basesize;
int fd = -1;
if (csFile) {
fd = open(csFile, mode, perm);
if (fd == -1) {
LOGERR;
return NULL;
}
basesize = lseek(fd, 0, SEEK_END);
if (basesize == -1) {
LOGERR;
close(fd);
return NULL;
} else
lseek(fd, 0, SEEK_SET);
base = mmap(NULL, basesize, prot, flags | MAP_FILE, fd, offset);
if (base == MAP_FAILED) {
LOGERR;
close(fd);
return NULL;
} else
close(fd);
} else if (offset) {
basesize = offset;
base = mmap(NULL, basesize, prot, MAP_ANON, -1, 0);
if (base == MAP_FAILED) {
LOGERR;
return NULL;
}
} else {
io_SetErr(EINVAL, "Invalid base argument ...");
return NULL;
}
buf = e_malloc(sizeof(struct tagBufIO));
if (!buf) {
LOGERR;
munmap(base, basesize);
return NULL;
} else
memset(buf, 0, sizeof(struct tagBufIO));
buf->buf_mode = BUFIO_MODE_LIMIT;
buf->buf_base = base;
buf->buf_size = basesize;
buf->buf_unmap = unmap_cf;
#ifdef __NetBSD__
f = funopen(buf, (int (*)(void *, char *, int)) rf_lim,
(int (*)(void *, char const *, int)) wf_lim,
(off_t (*)(void *, off_t, int)) sf_lim,
(int (*)(void *)) cf_);
#else
f = funopen(buf, (int (*)(void *, char *, int)) rf_lim,
(int (*)(void *, char const *, int)) wf_lim,
(fpos_t (*)(void *, fpos_t, int)) sf_lim,
(int (*)(void *)) cf_);
#endif
if (!f) {
LOGERR;
e_free(buf);
munmap(base, basesize);
return NULL;
}
return f;
}
/*
* io_dumbFile() - Create empry or dumb file with fixed size
*
* @csFile = Filename for create
* @mode = File access permissions
* @size = File size
* return: -1 error or open file handle
*/
int
io_dumbFile(const char *csFile, int mode, off_t size)
{
int fd;
fd = open(csFile, O_RDWR | O_CREAT, mode);
if (fd == -1) {
LOGERR;
return -1;
}
if (lseek(fd, size - 1, SEEK_SET) == -1)
goto err;
if (write(fd, "", 1) != 1)
goto err;
else
lseek(fd, 0, SEEK_SET);
return fd;
err:
LOGERR;
close(fd);
return -1;
}
/*
* io_fd2buf() - Convert open file handle to buffered file I/O
*
* @fd = File handle
* @mode = Permissions for new buffered file I/O
* return: NULL error or open buffered file
*/
FILE *
io_fd2buf(int fd, const char *mode)
{
FILE *f;
f = fdopen(fd, mode);
if (!f)
LOGERR;
return f;
}
FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>