str_echo08.lc

来自「linux网络编程中的经典源码」· LC 代码 · 共 23 行

#include    "unp.h"##  1 ##src/tcpcliserv/str_echo08.c##

void##  2 ##src/tcpcliserv/str_echo08.c##
str_echo(int sockfd)##  3 ##src/tcpcliserv/str_echo08.c##
{##  4 ##src/tcpcliserv/str_echo08.c##
    long    arg1, arg2;##  5 ##src/tcpcliserv/str_echo08.c##
    ssize_t n;##  6 ##src/tcpcliserv/str_echo08.c##
    char    line[MAXLINE];##  7 ##src/tcpcliserv/str_echo08.c##

    for (;;) {##  8 ##src/tcpcliserv/str_echo08.c##
        if ((n = Readline(sockfd, line, MAXLINE)) == 0)##  9 ##src/tcpcliserv/str_echo08.c##
            return;             /* connection closed by other end */## 10 ##src/tcpcliserv/str_echo08.c##

        if (sscanf(line, "%ld%ld", &arg1, &arg2) == 2)## 11 ##src/tcpcliserv/str_echo08.c##
            snprintf(line, sizeof(line), "%ld\n", arg1 + arg2);## 12 ##src/tcpcliserv/str_echo08.c##
        else## 13 ##src/tcpcliserv/str_echo08.c##
            snprintf(line, sizeof(line), "input error\n");## 14 ##src/tcpcliserv/str_echo08.c##

        n = strlen(line);## 15 ##src/tcpcliserv/str_echo08.c##
        Writen(sockfd, line, n);## 16 ##src/tcpcliserv/str_echo08.c##
    }## 17 ##src/tcpcliserv/str_echo08.c##
}## 18 ##src/tcpcliserv/str_echo08.c##