如何安全解析制表符分隔的字符串? [英] How to safety parse tab-delimited string ?

问题描述

如何安全分析制表符分隔符字符串?例如: test \ tbla-bla-bla \ t2332吗?

How to safety parse tab-delimiter string ? for example: test\tbla-bla-bla\t2332 ?

推荐答案

strtok()是用于解析带有任意定界符的字符串的标准函数.但是，它不是线程安全的.您选择的C库可能具有线程安全的变体.

strtok() is a standard function for parsing strings with arbitrary delimiters. It is, however, not thread-safe. Your C library of choice might have a thread-safe variant.

另一种符合标准的方式(只写了一下，这是未经测试的):

Another standard-compliant way (just wrote this up, it is not tested):

#include <string.h>
#include <stdio.h>

int main()
{
    char string[] = "foo\tbar\tbaz";
    char * start = string;
    char * end;
    while ( ( end = strchr( start, '\t' ) ) != NULL )
    {
        // %s prints a number of characters, * takes number from stack
        // (your token is not zero-terminated!)
        printf( "%.*s\n", end - start, start );
        start = end + 1;
    }
    // start points to last token, zero-terminated
    printf( "%s", start );
    return 0;
}

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