//输出合适格式的数字
void print_suit_num( int num, int max_length )
{
int num_length = 0;
if( num != 0 )
num_length = get_num_length( num );
else
num_length = 1;
for( ; (max_length - num_length) != 0; num_length++ )
printf( " " );
printf( "%d", num );
//最后面补上一个空格
printf( " " );
}
bool is_right_truncable(int n)
{
int num_length = get_num_length(n, 10);
int denominator;
while (n > 0)
{
denominator = pow(10, num_length - 1);
num_length--;
n %= denominator;
if (!is_prime(n) && n > 0)
{
return false;
}
}
return true;
}
void print_result( Fileinfo *file_array, enum Ignore_mode ignore_mode, enum Format format, enum Time_type time_type, bool recursive )
{
//通过全局变量count，获得当前目录文件数量.
//通过amount控制
int amount;
//通过total获得处理的总文件数
int total = 0;
//控制linke最大数
unsigned max_link = 1;
//获得用户名最长个数
unsigned max_name = 1;
//获得组名最长个数
unsigned max_group = 1;
//控制size最大数
unsigned max_size = 1;
//输出权限的字符串
char str[10];
struct passwd *user_id;
struct group *group_id;
//获取终端大小
struct winsize ws;
//最大可能将屏幕分256栏,用来记录每栏最大宽度
int block_length[256] = {0};
//用来记录一共多少栏
int block_num = 0;
//文件名最短检测
int min_name_length = 50;
//当前最大总长度
int max_sum_length = 0;
//控制实际输出到第几列,而不是用文件数量变量控制
int control_ana = 0;
//控制输出空格数量
int space_num = 0;
if( ioctl( 0, TIOCGWINSZ, &ws ) != 0 )
fprintf( stderr, "ioctl error.\n" );
////先处理一遍文件，求出链接数啊等等最大值
for( amount = 0; amount < count; amount++ )
{
//要么-a非隐藏，要么隐藏模式+隐藏dot.
if( (ignore_mode == IGNORE_MINIMAL)
|| (ignore_mode == IGNORE_DEFAULT)
&& (strncmp(file_array[amount].file_name, "..", 1 ) != 0) )
{
//处理文件数自加
total++;
//求链接数数字长度最大值
max_link = max( get_num_length(file_array[amount].file_nlink), max_link );
//求用户名最长值
user_id = getpwuid( file_array[amount].file_uid );
max_name = max( strlen(user_id->pw_name), max_name );
//求组名最长值
group_id = getgrgid( file_array[amount].file_gid );
max_group = max( strlen(group_id->gr_name), max_group );
//求size最大值
max_size = max( get_num_length(file_array[amount].file_size), max_size );
if( (strlen(file_array[amount].file_name)+2) < min_name_length )
min_name_length = strlen(file_array[amount].file_name)+2;
}
}
//通过屏幕宽度，根据最小文件名长度计算最大分多少列
//printf( "clo = %d, min length = %d.\n", ws.ws_col, min_name_length );
block_num = ws.ws_col / min_name_length;
//开始计算分栏
//当文件大于block_length[]中记录时候，block_num - 1
//并重新计算栏宽
//printf( "total %d lie.\n", block_num );
//求出小列宽度，最多列情况下，每一列的最长长度
while( 1 )
{
for( amount = 0, control_ana = 0; amount < count; amount++)
{
if( (ignore_mode == IGNORE_MINIMAL)
|| (ignore_mode == IGNORE_DEFAULT)
&& (strncmp(file_array[amount].file_name, "..", 1 ) != 0) )
{
//printf( "now exec is %d lie.\n",control_ana%block_num );
if( (strlen( file_array[amount].file_name )+2) > block_length[control_ana%block_num] )
{
block_length[control_ana%block_num] = strlen( file_array[amount].file_name ) +2;
}
//printf( "%d lie -- file %s,lie length is %d.\n", control_ana%block_num, file_array[amount].file_name, block_length[control_ana] );
control_ana++;
}
}
for( amount = 0, max_sum_length = 0; (amount < total) && (amount < block_num); amount++ )
{
max_sum_length += block_length[amount];
}
if( max_sum_length > ws.ws_col )
block_num--;
else
break;
//printf( "Now block_number is :%d.\n", block_num );
}
//printf( "total %d lie.\n", block_num );
printf( "Total %d files.\n", total );
/*
printf( "max link is %d.\n", max_link );
printf( "max name is %d.\n", max_name );
printf( "max grop is %d.\n", max_group );
printf( "max size is %d.\n", max_size );
*/
//开始显示文件
for( amount = 0; amount < count; amount++ )
{
if( (ignore_mode == IGNORE_MINIMAL)
|| (ignore_mode == IGNORE_DEFAULT)
&& (strncmp(file_array[amount].file_name, "..", 1 ) != 0) )
{
//printf( "file name = %s\n",file_array[amount].file_name );
//长格式输出
if( format == long_format )
{
Print_mode( file_array[amount].file_mode, str );
printf( "%-11s", str );
//输出链接数
print_suit_num( file_array[amount].file_nlink, max_link );
//根据uid输出用户名
user_id = getpwuid( file_array[amount].file_uid );
print_suit_char( user_id->pw_name, max_name );
//更具gid输出组名
group_id = getgrgid( file_array[amount].file_gid );
print_suit_char( group_id->gr_name, max_group );
//输出size
print_suit_num( file_array[amount].file_size, max_size );
//输出时间
// -u参数，显示的是最后访问时间
if( time_type == time_atime )
print_time( file_array[amount].file_atime );
else
print_time( file_array[amount].file_mtime );
//输出文件名
printf( "%s\n", file_array[amount].file_name );
// 默认参数，显示的是最后修改时间
}
if( format == default_format )
{
for( amount = 0, control_ana = 0; amount < count; amount++ )
{
if( (ignore_mode == IGNORE_MINIMAL)
|| (ignore_mode == IGNORE_DEFAULT)
&& (strncmp(file_array[amount].file_name, "..", 1 ) != 0) )
{
for( space_num = 0;
space_num <( block_length[control_ana%block_num] - strlen(file_array[amount].file_name) -2 );
space_num++ )
{
printf( " " );
}
control_ana++;
printf( "%s ", file_array[amount].file_name );
}
if( control_ana != 0 && control_ana % block_num == 0 )
printf( "\n" );
}
printf( "\n" );
}
}
}
}
