解析字符串并将令牌的索引放入表中

Question

我编写代码来查找（单引号或双引号）引号，一系列字符或“|”的开头和结尾然后将这些值放入数组中。出于某种原因，我不断遇到段错误。此外，之后，如何显示表格以确定它是否正常工作？

   int parsing(const char *commandline, int array[])
{
    int number= 0;
    int index = 0;
    while(commandline[index]!= '\0'){

        /* when you have spaces*/
        if (isspace(commandline[index]))
            index++;

        /* when you have double quotes*/
        if(commandline[index] == '"'){
            printf("running");
            array[number] = index;
            number++;
            index++;
            while(commandline[index] != '"' || '\0')
                index++;
            if(commandline[index] == '\0')
                return printf("ERROR: Quote not ended");
            array[number]= index;
            number++;
        }

        /* when you have single quotes*/
        if(commandline[index] == '\''){
            array[number] = index;
            number++;
            index++;
            while(commandline[index] != '\'' || '\0')
                index++;
            if(commandline[index] == '\0')
                return printf("ERROR: Quote not ended");
            array[number]= index;
            number++;
        }


        /* when you have |*/
        if ( commandline[index] == '|')
        {
            array[number] = index;
            number++;
        }


        /* when you have only letters*/
        if(isalnum(commandline[index])){
            array[number] = index;
            index++;
            number++;
            while (isalnum(commandline[index]))
                index++;
            array[number] = index;
        }

    }


  return *array;
}

编辑：添加错误检查

Answer 1

我找到了许多需要改进的地方，并将其添加为评论：

int parsing(const char *commandline, int array[])
{
    int number= 0;
    int index = 0;
    while(commandline[index]!= '\0'){

        /* when you have spaces*/
        if (isspace(commandline[index])) {
            index++;
            continue;  // So that if you are at the end of the string 
                       // you don't segfault.
       }

        /* when you have double quotes*/
        if(commandline[index] == '"'){
            printf("running");
            array[number] = index;
            number++;
            index++;
            // || '\0' just does nothing. Do:
            while(commandline[index] != '"') {
                if(commandline[index] == '\0') {
                    // returning printf sounds  silly. printf returns the number
                    // of character written.
                    // Also: Add \n to your printf.
                    printf("ERROR: Quote not ended\n");
                    return -1;
                }
                index++;
            }
            array[number]= index;
            number++;
            index++;
            continue;  // Same as for when you have spaces.
        }

        /* when you have single quotes*/
        if(commandline[index] == '\''){
            array[number] = index;
            number++;
            index++;
            // Ditto there.
            while(commandline[index] != '\'') {
              if(commandline[index] == '\0') {
                printf("ERROR: Quote not ended\n");
                return -1;
              }
              index++;
            }
            array[number]= index;
            number++;
            index++;
            continue;  // here also.
        }

        /* when you have |*/
        if ( commandline[index] == '|')
        {
            array[number] = index;
            number++;
            index++;  // move to next character.
            continue;
        }


        /* when you have only letters*/
        if(isalnum(commandline[index])){
            array[number] = index;
            index++;
            number++;
            while (isalnum(commandline[index]))
                index++;
            array[number] = index;
            continue;
        }
        // And if you get here, you have neigher an alphanum nor a | nor a "
        // nor a ', what do you want to do ?
        index++;
        continue;

    }


  return *array;
}