更确切地说,strtok如何生成其返回值所指向的字符串?它是否动态分配内存?我之所以问这个问题是因为我不确定在下面的代码中是否需要释放标记:
STANDARD_INPUT变量用于退出过程,以防我在分配内存时耗尽内存,而string是被测试的主题。
int ValidTotal(STANDARD_INPUT, char *str)
{
char *cutout = NULL, *temp, delim = '#';
int i = 0; //Checks the number of ladders in a string, 3 is the required number
temp = (char*)calloc(strlen(str),sizeof(char));
if(NULL == temp)
Pexit(STANDARD_C); //Exit function, frees the memory given in STANDARD_INPUT(STANDARD_C is defined as the names given in STANDARD_INPUT)
strcpy(temp,str);//Do not want to touch the actual string, so copying it
cutout = strtok(temp,&delim);//Here is the lynchpin -
while(NULL != cutout)
{
if(cutout[strlen(cutout) - 1] == '_')
cutout[strlen(cutout) - 1] = '\0'; \\cutout the _ at the end of a token
if(Valid(cutout,i++) == INVALID) //Checks validity for substring, INVALID is -1
return INVALID;
cutout = strtok(NULL,&delim);
strcpy(cutout,cutout + 1); //cutout the _ at the beginning of a token
}
free(temp);
return VALID; // VALID is 1
}
temp
部分的地址,与strtok
代码相关。temp
可以通过free(temp)
释放。 - BLUEPIXY