decode.c~

在linux中

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <iconv.h>

int get_message(const char *pdu,char *time,char *phone,char *msg);
int msg_dealwith(const char *msg,char *unicode);

int main(int argc,char *argv[])
{
	//char pdu[] = "0891683108100005F0240D91685121004572F0000880210191342323044F60597D";
	char pdu[] = "0891683108100005F0040D91685121004903F10008802101022262230A6211662F4F6059277237";
	char time[13];
	char phone[14];
	char msg[256];
	memset(msg,0,sizeof(msg));
	memset(phone,0,sizeof(phone));
	memset(time,0,sizeof(time));
	if(-1 == get_message(pdu,time,phone,msg)){
		printf("convert failed.\n");
		return EXIT_FAILURE;
	}
	printf("time:%s\n",time);
	printf("phone:%s\n",phone);
	printf("msg:%s\n",msg);
	
	
	return EXIT_SUCCESS;
}


/*将接收到的PDU字符串进行解码，求出时间、对方号码以及短信内容（将UCS2编码格式转换成utf-8格式）
pdu：接收到的PDU字符串
time：时间，格式为“年/月/日，时：分：秒”
phone：发送方的手机号码，格式为“86XXXXXXXXXXX”，总共11位（不算“86”）
msg：短信内容，已经转换为utf-8格式

转换成功则返回0；否则返回-1
*/
int get_message(const char *pdu,char *time,char *phone,char *msg)
{
	int i;
	char dump;
	
	/* 获取并处理时间 */
	char my_time[13];
	memset(my_time,0,sizeof(my_time));
	strncpy(my_time,pdu+42,12);
	
	for(i = 0; i < 12; i += 2){
		dump = my_time[i];
		my_time[i] = my_time[i+1];
		my_time[i+1] = dump;
	}
	sprintf(time,"%c%c/%c%c/%c%c,%c%c:%c%c:%c%c",my_time[0],my_time[1],my_time[2],my_time[3],my_time[4],my_time[5],my_time[6],my_time[7],my_time[8],my_time[9],my_time[10],my_time[11]);
	
	
	/* 获取手机号码 */
	char my_phone[15];
	memset(my_phone,0,sizeof(my_phone));
	strncpy(my_phone,pdu+24,14);
	
	for(i = 0; i < 14; i += 2){
		dump = my_phone[i];
		my_phone[i] = my_phone[i+1];
		my_phone[i+1] = dump;
	}
	
	strncpy(phone,my_phone,13);
	
	
	/* 获取短信内容 */
	char num_str[3];
	int num;
	num_str[0] = pdu[56];
	num_str[1] = pdu[57];
	num_str[2] = 0;
	sscanf(num_str,"%X",&num);
	
	char my_msg[256];
	memset(my_msg,0,sizeof(my_msg));
	strncpy(my_msg,pdu+58,num*2);
	
	///////////////////////////////////////
	printf("my_msg:%s\n",my_msg);
	//////////////////////////////////////
	
	/* 转换成utf-8格式并复制到msg中 */
	return msg_dealwith(my_msg,msg);
}



/*将UCS2字符串转换成utf-8格式的字符串
* unicode：短信息，UCS2字符串
* msg:utf-8格式的字符串，要求该缓冲区的长度足够长
*
* 转换成功，则返回0，否则返回-1
*/
int msg_dealwith(const char *unicode,char *msg)
{
	/* 将字符串的unicode转换为数字 */
	char unistr[3];
	char uninum[256];
	int i,unilen = strlen(unicode);
	memset(uninum,0,sizeof(uninum));
	for(i = 0; i < unilen; i += 2){
		unistr[0] = unicode[i];
		unistr[1] = unicode[i+1];
		unistr[2] = 0;
		sscanf(unistr,"%X",&uninum[i/2]);
	}
	
	/* 将unicode转换为utf-8代码，保存在out_msg中 */
	char *inbuf = uninum;						//输入缓冲区指针
	unsigned int insize = strlen(inbuf);	//在输入编码(fromcode)下所占用的字节数
	
	char out_msg[256];							//保存输出码(tocode)
	memset(out_msg,0,sizeof(out_msg));
	char *outbuf = out_msg;						//输出缓冲区指针
	unsigned int outsize = sizeof(out_msg);				//输出缓冲区长度
	unsigned int avail = outsize;				//记录输出缓冲区剩余空间长度
	
	iconv_t cd;
	cd=iconv_open("UTF-8","UCS-2BE");   	//将字符串编码由UCS-2转换为utf-8
	if(cd == (iconv_t)(-1)){
		return -1;
	}
	if((size_t)(-1) == iconv(cd,&inbuf,&insize,&outbuf,&avail)){
		return -1;
	}
	iconv_close(cd);
	
	
	/* 将转换后的内容复制到msg中 */
	strncpy(msg,out_msg,outsize-avail);
	
	return 0;
}