使用perl将文本文件转换为二进制文件的问题

Question

我想使用 Perl 将一些数据转换为二进制。数据需要以8位二进制输出。原始数据采用以下格式：

为此，我转换了数据以抑制“.0000”，然后我使用带有选项 C* 的 pack 函数（此格式对应于 "unsigned character (usually 8 bits)"到文档）。我将此文件命名为 txt2bin.pl:

my $file = $ARGV[0];
my $fileout = $file.".bin";

if($file eq "-h" or $file eq "-help" or $file eq "")
{  
    print "Usage : txt2bin.pl file_in\n";
    print "        file_out = file_in.bin\n";
    print "This script converts a txt file to a binary file\n";

}

else
{
  print "File in = $file\n";
  print "File out = $fileout\n";

  open(FILE,"<$file") or die $!;
  open(FILEOUT,">$fileout") or die $!;
    binmode FILEOUT;
    while(defined(my $line=<FILE>))
    {
      chomp($line);
      $line =~ s/\.0000//;
      syswrite FILEOUT, pack("C*",$line);
    }
  close(FILE);
  close(FILEOUT);
}

我还需要能够进行反向操作，所以，我创建了另一个文件bin2txt.pl:

my $file = $ARGV[0];
my $fileout = $file.".txt";

if($file eq "-h" or $file eq "-help" or $file eq "")
{
    print "Usage : bin2txt.pl file_in\n";
    print "        file_out = file_in.txt\n";
    print "This script converts a binairy file to a txt file\n";
}

else
{
  print "File in = $file\n";
  print "File out = $fileout\n";

  my $file = "<$file";

  # undef $/ to read whole file in one go
  undef $/;

  open(FILE,$file) or die $!;
  open(FILEOUT,">$fileout") or die $!;

  # binmode FILE to supress conversion of line endings
  binmode FILE;

  my $data = <FILE>;
  $data =~ s/(.{1})/unpack("C*",).".0000 \n"/eg;
  syswrite FILEOUT, $data;
}

然而，当我执行第一个程序txt2bin.pl，然后执行第二个程序时，我应该得到：

相反，我得到了这个：

10.0000 没有出现，你们有什么想法吗？感谢您的帮助。

Answer 1

您需要将 s 修饰符添加到正则表达式替换以匹配 10（换行符）：

$data =~ s/(.{1})/unpack("C*",).".0000 \n"/seg;

来自 perldoc perlre :

s
Treat the string as single line. That is, change "." to match any character whatsoever, even a newline, which normally it would not match.

使用perl将文本文件转换为二进制文件的问题

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