PJLIB库基础框架-数据结构之字符串的使用

#include <stdio.h>
#include <pjlib.h>
#include <pj/types.h> // 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));
}
}