PJLIB库基础框架-数据结构之字符串的使用

原文地址：http://blog.csdn.net/sunlion81/article/details/8833471

#include
#include
#include  // for pj_init.

#define THIS_FILE "main.c"

/*
字符串
struct pj_str_t
{
    char       *ptr;
    pj_ssize_t  slen;
};
*/

/*
字符串测试
*/
void string_test(void);

int main(int argc, char** argv)
{
    pj_status_t status;

    // pjlib库初始化
    status = pj_init();
    if (status != PJ_SUCCESS)
    {
        char errmsg[PJ_ERR_MSG_SIZE];
        pj_strerror(status, errmsg, sizeof(errmsg));
        PJ_LOG(1,(THIS_FILE, "%s: %s [status=%d]", pj_init, errmsg, status));
        return -1;
    }

    // 字符串测试
    string_test();

    // pjlib库关闭
    pj_shutdown();

    return 0;
}

/*
字符串测试
*/
void string_test(void)
{
    {
        // char ==> pj_str_t
        pj_str_t str;
        str = pj_str("Hello PJ_STR_T!");
        PJ_LOG(3, (THIS_FILE, "str = %.*s", str.slen, str.ptr));
    }

    {
        // pj_str_t ==> char
        pj_str_t str;
        char buffer[256];

        // 使用C字符串产生常量字符串
        pj_cstr(&str, "Hello C char!");

        memset(buffer, 0, sizeof(buffer));
        strncpy(buffer, str.ptr, str.slen);

        PJ_LOG(3, (THIS_FILE, "buffer = %s", buffer));
    }

    {
        // 无符号整数转换成字符串
        char buffer[256];
        unsigned val = 123456;

        memset(buffer, 0, sizeof(buffer));
        pj_utoa(val, buffer);

        PJ_LOG(3, (THIS_FILE, "val[%d] => buffer[%s]", val, buffer));
    }

    {
        // 将字符串转换为无符号整数
        unsigned val;
        pj_str_t str;

        str = pj_str("9367");
        val = pj_strtoul(&str);

        PJ_LOG(3, (THIS_FILE, "str[%.*s] => val[%d]", str.slen, str.ptr, val));
    }

    {
        // 删除字符串头尾空白符
        pj_str_t str;
        str = pj_str("  a b c 1 2 3 ");
        PJ_LOG(3, (THIS_FILE, "str[%.*s]", str.slen, str.ptr));
        pj_strtrim(&str);
        PJ_LOG(3, (THIS_FILE, "str[%.*s]", str.slen, str.ptr));
    }
}