C:从分隔的源字符串创建字符串数组 [英] C: creating array of strings from delimited source string

问题描述

在 C(不是 C++)中将分隔字符串转换为字符串数组的有效方法是什么?例如，我可能有:

What would be an efficient way of converting a delimited string into an array of strings in C (not C++)? For example, I might have:

char *input = "valgrind --leak-check=yes --track-origins=yes ./a.out"

源字符串将始终只有一个空格作为分隔符.我想要一个由 malloc 处理过的字符串 char *myarray[] 的 malloc 处理过的数组，这样:

The source string will always have only a single space as the delimiter. And I would like a malloc'ed array of malloc'ed strings char *myarray[] such that:

myarray[0]=="valgrind"
myarray[1]=="--leak-check=yes"
...

编辑我必须假设 inputString 中有任意数量的标记，所以我不能将它限制为 10 或其他.

Edit I have to assume that there are an arbitrary number of tokens in the inputString so I can't just limit it to 10 or something.

我尝试使用 strtok 和一个我已经实现的链表来解决一个凌乱的解决方案，但是 valgrind 抱怨太多以至于我放弃了.

I've attempted a messy solution with strtok and a linked list I've implemented, but valgrind complained so much that I gave up.

(如果您想知道，这是针对我正在尝试编写的基本 Unix shell.)

(If you're wondering, this is for a basic Unix shell I'm trying to write.)

推荐答案

类似于:

char* string = "valgrind --leak-check=yes --track-origins=yes ./a.out";
char** args = (char**)malloc(MAX_ARGS*sizeof(char*));
memset(args, 0, sizeof(char*)*MAX_ARGS);

char* curToken = strtok(string, " \t");

for (int i = 0; curToken != NULL; ++i)
{
  args[i] = strdup(curToken);
  curToken = strtok(NULL, " \t");
}

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