nuttx/libs/libc/string/lib_bmem2cmem.c

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This commit brings in the drivers needed to support OpenAMP. These changes were ported from https://github.com/FishsemiCode/nuttx. The current state: Most drivers do now compile but are not yet verfied. This port was effort of a number of people, I rather arbitrarily gave authorship to Guiding Li because he has the largest number of fundamental quashed commits from the Xiamoi repository. Squashed commit of the following: Author: Xiang Xiao <xiaoxiang@pinecone.net> include/nuttx/b2c.h and libx/libc/string: Add non-standard string functions to deal with cases where there are more than 8-bits in a type char. Author: Gregory Nutt <gnutt@nuttx.org> Fix several build issues/missing definitiona needed for OpenAMP build in drivers/. Add OpenAMP code has been reviewed and ran through tools/nxstyle (with all reports accounted for). Author: Xiang Xiao <xiaoxiang@xiaomi.com> tools/: Fix the minor issue in Makefile Author: Gregory Nutt <gnutt@nuttx.org> drivers/rptun/rptun.c: Review for coding standard. Run against tools/nxstyle. tools/LibTargets.mk: Fix some TABs that were turned into spaces by a copy-paste. fs/hostfs: Add configure and build support for hostfs RPC. drivers/timer: Add configure and build support for syslog RTC. drivers/syslog: Add configure and build support for syslog RPC. drivers/serial: Add configure and build support for serial RPC. Kconfig, tools/*.mk. openamp/: Add basic OpenAMP build support. drivers/rptun: Add configure and build support for OpenAMP tunnel drivers. drivers/net: Update Make.defs and Kconfig for OpenSDA support. Remove drivers/clk/clk-rpmsg.c drivers/power/rpmsg_regulator.c. These depend on upstreaming support for a new subsystem based on the clk/regulator is model from Linux. Removed because we want to separate the activities. We will just try to get the basic OpenAMP support in place for now. Remove drivers/misc/misc_rpmsg.c and include/nuttx/misc/misc_rpmsg.h. These are specific to the Xiaomi application. Author: zhuyanlin <zhuyanlin@pinecone.net> This commit brings in the OpenAMP OS driver/RPC components from https://github.com/FishsemiCode/nuttx. Initial commit is source files only. Additional changes to Kconfig and Make.defs files still needed. Author: Jianli Dong <dongjianli@pinecone.net> This commit brings in the OpenAMP OS driver/RPC components from https://github.com/FishsemiCode/nuttx. Initial commit is source files only. Additional changes to Kconfig and Make.defs files still needed. Author: Guiding Li <liguiding@pinecone.net> This commit brings in the OpenAMP OS driver/RPC components from https://github.com/FishsemiCode/nuttx. Initial commit is source files only. Additional changes to Kconfig and Make.defs files still needed.
2019-11-02 18:30:33 +01:00
/****************************************************************************
* libc/stdlib/lib_bmem2cmem.c
*
* Copyright (C) 2017 Pinecone Inc. All rights reserved.
* Author: Xiang Xiao <xiaoxiang@pinecone.net>
*
* 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. Neither the name NuttX 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 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.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <stdlib.h>
#if !defined(CONFIG_ENDIAN_BIG) && CHAR_BIT != 8
/****************************************************************************
* Public Functions
****************************************************************************/
void bmem2cmem(FAR void *dst_, FAR const void *src_, size_t rem, size_t len)
{
char *dst = dst_;
const char *src = src_;
while (1)
{
int i;
for (i = 8 * rem; i < CHAR_BIT; i += 8)
{
if (len-- == 0)
{
return;
}
*dst++ = (*src >> i) & 0xff;
}
rem = 0;
src++;
}
}
#endif