fat16Îļþϵͳ cÎļþ
/* =========================================================================== */
/* Project: mp3 player */
/* File: fat16.c */
/* Organization: cug-1200525 */
/* Author: yuyongbao */
/* Date: 6/19/2007 */
/* Describe: fat16 */
/* =========================================================================== */
#include "..\lib_config.h"
#include "FAT16.h"
#include "string.h"
//********************************************************************************************
//deine value which may be used in each function
uint8 BUFFER[512]; //a sectors size
uint16 BPB_BytsPerSec;
uint8 BPB_SecPerClus;
uint16 BPB_RsvdSecCnt;
uint8 BPB_NumFATs;
uint16 BPB_RootEntCnt;
uint16 BPB_TotSec16;
uint16 BPB_FATSz16;
uint32 BPB_HiddSec;
uint32 BPB_TotSec32;
/////whe
Ïà¹ØÎĵµ£º
CÓïÑÔ±ØÖª±Ø»á£¨2£©
4.º¯ÊýºÍÖ¸Õë
4.1. Ö¸Ïòº¯ÊýµÄÖ¸Õë
Ö¸Ïòº¯ÊýµÄÖ¸Õ뼴ͨ³£ËµµÄº¯ÊýÖ¸Õ룬ÕýÊÇÓÉÓÚÕâЩ¼ò³Æ£¬ËùÒÔËüºÍ·µ»ØÖ¸ÕëµÄº¯Êý£¨Ö¸Õ뺯Êý£©ÈÝÒ×»ìÏý£¬¶øÇÒÒ²ÓÉÓÚд·¨ÉϱȽÏÏà½ü£¬¾ÍÏñÊý×éÖ¸Õë(int (*p)[4])ºÍÖ¸ÕëÊý×é(int *p[4])Ò»Ñù£¬Ç°Õß±íʾָÕë±äÁ¿pÖ¸ÏòÒ»¸öһάÊý×飬Õâ¸öÊý×éº¬Ó ......
C/C++ÕÐÆ¸µÄһЩ¸ÐÊܺ;Ñé
ǰ¶Îʱ¼ä¸Õ²Î¼ÓÁËn¶à¹«Ë¾µÄC/C++Èí¼þ¹¤³ÌʦµÄÃæÊÔ£¬ÓйúÆó£¬ÍâÆó£¬Ë½Æó£¨moto£¬·É˼¿¨¶û£¬¸ÛÍ壬ÖйúÎÀÐÇXXX£¨Õâ¸öÅ££©£©µÈµÈµÈµÈ¡£¸ÐÊܸÐÏëÆÄ¶à£¬½üÈÕÖÕÓÚ¿ÕÏУ¬Ôڴ˱íÊöһϡ£
±¾ÈË»ù±¾Ìõ¼þ£º3Ä꿪·¢¾Ñ飬2year+ Windows development experence£¬1year+ Linux experence. ÊìϤC£¬C++£¬MFC/ ......
bcmp
ÔÐÍ£ºextern int bcmp(const void *s1, const void *s2, int n);
Ó÷¨£º#include <string.h>
¹¦ÄÜ£º±È½Ï×Ö·û´®s1ºÍs2µÄǰn¸ö×Ö½ÚÊÇ·ñÏàµÈ
˵Ã÷£ºÈç¹ûs1=s2»òn=0Ôò·µ»ØÁ㣬·ñÔò·µ»Ø·ÇÁãÖµ¡£bcmp²»¼ì²éNULL¡£
bcopy
ÔÐÍ£ºextern void bcopy(const void *src, void *dest, int n);
Ó÷ ......
ǰ¶Îʱ¼ä¸Õ²Î¼ÓÁËn¶à¹«Ë¾µÄC/C++Èí¼þ¹¤³ÌʦµÄÃæÊÔ£¬ÓйúÆó£¬ÍâÆó£¬Ë½Æó£¨moto£¬·É˼¿¨¶û£¬¸ÛÍ壬ÖйúÎÀÐÇXXX£¨Õâ¸öÅ££©£©µÈµÈµÈµÈ¡£¸ÐÊܸÐÏëÆÄ¶à£¬½üÈÕÖÕÓÚ¿ÕÏУ¬Ôڴ˱íÊöһϡ£
±¾ÈË»ù±¾Ìõ¼þ£º3Ä꿪·¢¾Ñ飬2year+ Windows development experence£¬1year+ Linux experence. ÊìϤC£¬C++£¬MFC/SDK/API,MiniG ......
N µ±ÓÃÁ½¸ö²¹Âë±íʾµÄ´ø·ûºÅÊý½øÐÐÔËËãʱ£¬N=1±íʾÔËËãµÄ½á¹ûΪ¸ºÊý£»N=0±íʾÔËËãµÄ½á¹ûΪÕýÊý»òÁã.
Z Z=1±íʾÔËËãµÄ½á¹ûΪÁ㣬Z=0±íʾÔËËãµÄ½á¹û·ÇÁã¡£
C ¿ÉÒÔÓÐ4ÖÖ·½·¨ÉèÖÃCµÄÖµ£º
¼Ó·¨ÔËË㣨°üÀ¨CMN£©£ºµ±ÔËËã½á¹û²úÉúÁ˽øÎ»Ê±£¨ÎÞ·ûºÅÊýÒç³ö£©£¬C=1£¬·ñÔòC=0¡£
¼õ·¨ÔË ......