NyLPC_cFifoBuffer.c

00001 /*********************************************************************************
00002  * PROJECT: MiMic
00003  * --------------------------------------------------------------------------------
00004  *
00005  * This file is part of MiMic
00006  * Copyright (C)2011 Ryo Iizuka
00007  *
00008  * MiMic is free software: you can redistribute it and/or modify
00009  * it under the terms of the GNU Lesser General Public License as published
00010  * by　the Free Software Foundation, either version 3 of the　License, or
00011  * (at your option) any later version.
00012  *
00013  * This program is distributed in the hope that it will be useful,
00014  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00015  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00016  * GNU General Public License for more details.
00017  *
00018  * You should have received a copy of the GNU Lesser General Public License
00019  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
00020  *
00021  * For further information please contact.
00022  *  http://nyatla.jp/
00023  *  <airmail(at)ebony.plala.or.jp> or <nyatla(at)nyatla.jp>
00024  *
00025  *********************************************************************************/
00026 #include "NyLPC_cFifoBuffer.h"
00027 #include <string.h>
00028 
00029 /**
00030  * See Header file.
00031  */
00032 void NyLPC_cFifoBuffer_initialize(NyLPC_TcFifoBuffer_t* i_inst,void* i_buf,NyLPC_TUInt16 i_buf_size)
00033 {
00034     i_inst->len=0;
00035     i_inst->size=i_buf_size;
00036     i_inst->buf=i_buf;
00037 }
00038 
00039 
00040 /**
00041  * See Header file.
00042  */
00043 void NyLPC_cFifoBuffer_push(NyLPC_TcFifoBuffer_t* i_inst,const void* i_data,NyLPC_TUInt16 i_data_len)
00044 {
00045     NyLPC_TUInt8* wp;
00046     NyLPC_ArgAssert(NyLPC_cFifoBuffer_getSpace(i_inst)>=i_data_len);
00047 
00048     wp=((NyLPC_TUInt8*)(i_inst->buf))+i_inst->len;
00049     memcpy(wp,i_data,i_data_len);
00050     i_inst->len+=i_data_len;
00051 }
00052 void* NyLPC_cFifoBuffer_prePush(NyLPC_TcFifoBuffer_t* i_inst,NyLPC_TUInt16 i_data_len)
00053 {
00054     NyLPC_TUInt8* wp;
00055     NyLPC_ArgAssert(NyLPC_cFifoBuffer_getSpace(i_inst)>=i_data_len);
00056     wp=((NyLPC_TUInt8*)(i_inst->buf))+i_inst->len;
00057     i_inst->len+=i_data_len;
00058     return wp;
00059 }
00060 
00061 /**
00062  * See Header file.
00063  */
00064 void NyLPC_cFifoBuffer_pop(NyLPC_TcFifoBuffer_t* i_inst,NyLPC_TUInt16 i_len)
00065 {
00066     NyLPC_TUInt8* wp;
00067     NyLPC_TUInt8* rp;
00068     NyLPC_ArgAssert(NyLPC_cFifoBuffer_getLength(i_inst)>=i_len);
00069     wp=(NyLPC_TUInt8*)i_inst->buf;
00070     rp=wp+i_len;
00071     i_inst->len-=i_len;
00072     memmove(wp,rp,i_inst->len);
00073 }
00074 
00075 /**
00076  * See Header file.
00077  */
00078 void* NyLPC_cFifoBuffer_getPtr(const NyLPC_TcFifoBuffer_t* i_inst)
00079 {
00080     return (void*)(i_inst->buf);
00081 }
00082 /**
00083  * See Header file.
00084  */
00085 NyLPC_TUInt16 NyLPC_cFifoBuffer_getLength(const NyLPC_TcFifoBuffer_t* i_inst)
00086 {
00087     return i_inst->len;
00088 }
00089 /**
00090  * See Header file.
00091  */
00092 NyLPC_TUInt16 NyLPC_cFifoBuffer_getSpace(const NyLPC_TcFifoBuffer_t* i_inst)
00093 {
00094     return i_inst->size-i_inst->len;
00095 }