windows下使用C/C++怎么遍历目录并读取目录下的文件列表
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发布时间：2022-04-26 15:19
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时间：2023-05-07 10:02
//
#include "stdafx.h"
#include <filesystem>
#include <windows.h>
#define OK 0
#define ERR -1
#define TEST_FILE_MAX_SIZE "4.67G"
#define EXT_LEN 8
#define TYPE_LEN 8
#define DIR_MAX_LEN 260 //文件路径最多256个字符，加上D:\\
//ftell()返回int，最大2G 1<<32-1
typedef enum COND_VALUE
{
COND_VALUE_MORE = 0 ,//大于
COND_VALUE_LESS = 1 ,//小于
COND_VALUE_EUAQL = 2 ,//等于
COND_VALUE_MAX = 0xf
}COND_VALUE_E;
typedef enum COND_TYPE
{
COND_TYPE_SIZE = 0 ,
COND_TYPE_CTIME = 1 ,
COND_TYPE_MTIME = 2,
COND_TYPE_EXTNAME = 4,
COND_TYPE_FILETYPE = 8,
COND_TYPE_MAX = 0xf
}COND_TYPE_E;
typedef struct COND_INFO
{
char cCondType : 4;
char cCondValue : 4;
}COND_INFO_S;
typedef struct FILE_COND
{
//按照bit位来划分，前面四个bit位表示条件类型，后面四个bit位表示条件值
char cSymbol;//用来标志大于或者小于，搜索时间，大小，类型，扩展名，属性
char szRes[ 3 ];//预留3个字节，四字节对齐
unsigned int uiSizeHigh;//文件大小 高位
unsigned int uiSizeLow;//低位
unsigned int uiCStartTime;//创建时间
unsigned int uiCEndTime;
unsigned int uiMStartTime;//修改时间
unsigned int uiMEndTime;
char szExtName[ EXT_LEN ];//扩展名
char szFileType[ TYPE_LEN ];//文件类型
unsigned int uiFileAttrib;//文件属性
unsigned int uiFolderSizeHight;//文件夹大小
unsigned int uiFolderSizeLow;
}FILE_COND_S;
//最大允许多少个条件搜索
#define CONDITION_MAX 4
FILE_COND_S g_astCond[ CONDITION_MAX ] = { 0 };
int g_iCondCnt = 0;
int DisposeFile(char szFilePath[] , WIN32_FIND_DATA stWinFile)
{
DWORDLONG dwHighBase = MAXDWORD;
dwHighBase += 1;
DWORDLONG FileSize = stWinFile.nFileSizeHigh* dwHighBase + stWinFile.nFileSizeLow;
printf("%s\\%s--Size:%lu\n" , szFilePath , stWinFile.cFileName , FileSize);
return OK;
}
//转换字符串文件大小（如 45.67G）到int类型的文件大小
#define SECTION_CNT 2
#define MAX_NUM_DEC 100
#define UNIT_CNT 4
#define KB_OFFSET 10 //1KB == 1BIT<<10;
#define MB_OFFSET 20
#define GB_OFFSET 30
#define TB_OFFSET 40
#define INT_OFFSET 32
int ConvertSizeStr2SizeLong(char szSizeStr[],unsigned int* puiSizeHigh,unsigned int* puiSizeLow)
{
int aNumSect[ SECTION_CNT ] = { 0 };//分别存整数位和小数位
//char sz = "...";
char acValidUint[UNIT_CNT] = { 'K' , 'M' , 'G' , 'T' };//数组
//char acValidUint[] = "KMGT";//字符串
char acOffset[ UNIT_CNT ] = { KB_OFFSET , MB_OFFSET , GB_OFFSET , TB_OFFSET };
char cOffset = 0;
int iBaseNum;
char* pcTmp;
int index = 0;
int i;
int iMask;
//入参判断
if (szSizeStr == NULL)
{
return ERR;
}
pcTmp = szSizeStr;
while (*pcTmp!=0)
{
if (*pcTmp == '.')
{
index++;
if ( index >= SECTION_CNT )
{
return ERR;
}
}
else if ( *pcTmp >= '0' && *pcTmp <= '9' )
{
//小数位取3位，剩余的舍去
if ( index == 1 && aNumSect[ index ] > MAX_NUM_DEC )
{
pcTmp++;
continue;
}
else if (index == 0 && aNumSect[index] > MAX_NUM_DEC)
{
//1234G 不合法，应该写成1.234T
return ERR;
}
aNumSect[ index ] = aNumSect[ index ] * 10 + *pcTmp - '0';
}
else
{
for ( i = 0; i < UNIT_CNT;++i )
{
if ( toupper(*pcTmp) == acValidUint[ i ] )
{
break;
}
}
if (i == UNIT_CNT)
{
return ERR;
}
}
pcTmp++;
}
if (cOffset == 0)
{
*puiSizeHigh = 0;
*puiSizeLow = aNumSect[ 0 ];
}
else
{
//先转为下一级单位
iBaseNum = ( aNumSect[ 0 ] << KB_OFFSET ) + aNumSect[ 0 ];//能保证小于MAX_UNIT
cOffset -= KB_OFFSET;
}
iMask = ( 1 << cOffset ) - 1;//用于取低于（INT_OFFSET - cOffset）数据
*puiSizeHigh = ( iBaseNum >> ( INT_OFFSET - cOffset ) ) & iMask;
*puiSizeLow = iBaseNum << cOffset;
return OK;
}
//比较文件大小
int CompareFileSize(WIN32_FIND_DATA stWinFile , FILE_COND_S stCond,char cCondValue)
{
switch ( cCondValue )
{
case COND_VALUE_LESS:
{
if ( stWinFile.nFileSizeHigh > stCond.uiSizeHigh )
{
return ERR;
}
else if ( stWinFile.nFileSizeHigh ==stCond.uiSizeHigh )
{
if ( stWinFile.nFileSizeLow > stCond.uiSizeLow )
{
return ERR;
}
}
break;
}
case COND_VALUE_MORE:
{
if ( stWinFile.nFileSizeHigh < stCond.uiSizeHigh )
{
return ERR;
}
else if ( stWinFile.nFileSizeHigh == stCond.uiSizeHigh )
{
if ( stWinFile.nFileSizeLow < stCond.uiSizeLow )
{
return ERR;
}
}
break;
}
case COND_VALUE_EUAQL:
{
if ( stWinFile.nFileSizeHigh != stCond.uiSizeHigh || stWinFile.nFileSizeLow != stCond.uiSizeLow )
{
return ERR;
}
break;
}
default:
break;
}
return OK;
}
int CompareFileTime(WIN32_FIND_DATA stWinFile , FILE_COND_S stCond , char cCondValue)
{
return OK;
}
int CheckCondition(char szFilePath[],WIN32_FIND_DATA stWinFile)
{
int i;
int iCondType;
int iCondValue;
COND_INFO_S* pstCondInfo;
for ( i = 0; i < g_iCondCnt; ++i )
{
pstCondInfo = (COND_INFO_S*)(&( g_astCond[ i ].cSymbol));
switch (pstCondInfo->cCondType)
{
case COND_TYPE_SIZE:
{
if ( CompareFileSize(stWinFile , g_astCond[ i ],pstCondInfo->cCondValue) != OK )
{
return ERR;
}
break;
}
case COND_TYPE_CTIME:
{
if ( CompareFileTime(stWinFile , g_astCond[ i ] , pstCondInfo->cCondValue) != OK )
{
return ERR;
}
break;
}
//...
default:
break;
}
}
return OK;
}
int ScanDir(char szDir[])
{
if ( szDir == NULL )
{
return ERR;
}
char szSubDir[ DIR_MAX_LEN ] = { 0 };
char szFind[ DIR_MAX_LEN ] = { 0 };
WIN32_FIND_DATA stWinFile;
HANDLE hd;
_snprintf_c(szFind ,
DIR_MAX_LEN ,
"%s\\*" ,
szDir);//两个反斜杠表示一个反斜杠转义符
hd = FindFirstFile(szFind , &stWinFile);//hd标志文件位置，用于查找下一个文件
if ( hd == INVALID_HANDLE_VALUE )
{
return ERR;
}
while (1)
{
if (strcmp(stWinFile.cFileName,".") == 0 || strcmp(stWinFile.cFileName,"..") == 0)
{
//NULL
}
//判断是否是文件夹
else if ( stWinFile.dwFileAttributes == FILE_ATTRIBUTE_DIRECTORY )
{
//清空szSubDir，因为在重新对szSubDir赋值时，是直接覆盖的，后者比当前保存的数据短，所以需要先清空再赋值
memset(szSubDir , 0 , DIR_MAX_LEN);
_snprintf_c(szSubDir , DIR_MAX_LEN , "%s\\%s" , szDir , stWinFile.cFileName);
ScanDir(szSubDir);//递归处理
}
else
{
if ( CheckCondition(szDir , stWinFile) == OK )
{
DisposeFile(szDir , stWinFile);
}
}
//查找下一个文件失败就跳出循环
if ( !FindNextFile(hd , &stWinFile) )
{
break;
}
}
FindClose(hd);
return OK;
}
int _tmain(int argc, _TCHAR* argv[])
{
COND_INFO_S stCond = { 0 };
COND_INFO_S* pstCond;
char szDir[] = "C:";
stCond.cCondValue = COND_TYPE_SIZE;
stCond.cCondValue = COND_VALUE_MORE;
if (ConvertSizeStr2SizeLong(TEST_FILE_MAX_SIZE,&(g_astCond[0].uiSizeHigh),&(g_astCond[0].uiSizeLow)) == OK)
{
memcpy(&(g_astCond[ 0 ].cSymbol),&stCond,1);
pstCond = (COND_INFO_S*)( &g_astCond[ 0 ].cSymbol );
g_iCondCnt = 1;
ScanDir(szDir);
}
system("pause");
return 0;
}
