[英]In Perl, how can I unpack to several variables?
I have a struct wich contains: 我有一个包含的结构:
struct mystruct{
int id[10];
char text[40];
unsigned short int len;
};
And I'm trying to unpack it in a single line, something like this: 我正在尝试将其包装成一行,如下所示:
my(@ids,$text,$length) = unpack("N10C40n",$buff) ;
But everything is going to the first array(@ids), i've tried templates as " N10 C40 n
" and " (N10)(C40)(n)
" So, either this can't be done or I'm not using the proper template string. 但是,一切都将转到第一个数组(@ids),我已经尝试将模板分别为“
N10 C40 n
”和“ (N10)(C40)(n)
”使用正确的模板字符串。
Note: I'm using big endian data. 注意:我使用的是大端数据。
Any hints? 有什么提示吗?
In list assignment the first array or hash will eat everything (how would it know where to stop?). 在列表分配中,第一个数组或哈希将吃掉所有内容(它将如何知道从何处停止?)。 Try this instead:
尝试以下方法:
my @unpacked = unpack "N10Z40n", $buff;
my @ids = @unpacked[0 .. 9];
my ($text, $length) = @unpacked[10, 11];
you could also say 你也可以说
my @ids;
(@ids[0 .. 9], my ($text, $length)) = unpack "N10Z40n", $buff;
如果@ids
的顺序无关紧要:
my ($length, $text, @ids) = reverse unpack("N10C40n",$buff) ;
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