helper.c

基于lpc2148（arm7）的wav音乐格式播放器的设计

/*****************************************************************************\
*              efs - General purpose Embedded Filesystem library              *
*          --------------------- -----------------------------------          *
*                                                                             *
* Filename : helper.c                                                         *
* Description : These functions may NOT BE USED ANYWHERE ! They are helper    *
*               functions for the Linux based developement. They use the GNU  *
*               C library and headers.                                        *
*                                                                             *
* This program is free software; you can redistribute it and/or               *
* modify it under the terms of the GNU General Public License                 *
* as published by the Free Software Foundation; version 2                     *
* of the License.                                                             *
                                                                              *
* This program is distributed in the hope that it will be useful,             *
* but WITHOUT ANY WARRANTY; without even the implied warranty of              *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the               *
* GNU General Public License for more details.                                *
*                                                                             *
* As a special exception, if other files instantiate templates or             *
* use macros or inline functions from this file, or you compile this          *
* file and link it with other works to produce a work based on this file,     *
* this file does not by itself cause the resulting work to be covered         *
* by the GNU General Public License. However the source code for this         *
* file must still be made available in accordance with section (3) of         *
* the GNU General Public License.                                             *
*                                                                             *
* This exception does not invalidate any other reasons why a work based       *
* on this file might be covered by the GNU General Public License.            *
*                                                                             *
*                                                    (c)2006 Lennart Yseboodt *
*                                                    (c)2006 Michael De Nil   *
\*****************************************************************************/

#include "interfaces/helper.h"

void* Malloc(eint32 size)
{
 void*x;
 
 if((x=malloc(size))==NULL){
  perror("Malloc: ");
  exit(-1);
 }
 return(x);
}
 
void Fopen(FILE **f,eint8* filename)
{
 *f=fopen(filename,"r+");
 if(*f==NULL){
  perror("Fopen: ");
  exit(-1);
 }
}

void MMap(eint8* filename,void**x,eint32 *size)
{
 FILE *tmp;
 eint32 filesize,c;
 
 Fopen(&tmp,filename);
 filesize=getFileSize(tmp);
 *x=Malloc(filesize);
 for(c=0;c<filesize;c++)*((char*)(*x)+c)=fgetc(tmp);
 *size=filesize;
 fclose(tmp);
}

int getFileSize(FILE* file)
{
 eint32 c=0;
 
 fseek(file,0,SEEK_END);
 c=ftell(file);
 return(c);
}

void PrintBuf(euint8* buf)
{
	euint16 c,cc;
	
	for(c=0 ; c<32 ; c++){
			printf("\n%4x : ",c*16);
		for(cc=0;cc<16;cc++){
			printf("%2x ",buf[c*16+cc]);
		}
		printf("   ");
		for(cc=0;cc<16;cc++){
			printf("%c",buf[c*16+cc]>=32?buf[c*16+cc]:'*');
		}
	}
	printf("\n");
}