Capital ÅÄÖ 打印不正确
Capital ÅÄÖ not printing correctly
我对在 UNIX-talk 克隆中正确打印 UTF-8 和瑞典语字符 ÅÄÖ 时遇到的问题感到困惑。
我已经使用 setLocale() 将语言环境设置为 sv_SE，并且我正在使用宽字符来尝试正确显示字符，小写 åäö 工作得很好，但不知何故大写变体不起作用。
下面是完整的代码，我怀疑 reader() sender() 或 putch() 中的字符大小缺少某些内容。
#define _GNU_SOURCE
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <ncurses.h>
#include <pthread.h>
#include <signal.h>
#include <netdb.h>
#include <arpa/inet.h>
#include <sched.h>
#include <pthread.h>
#include <locale.h>
#include <wchar.h>
#define MATRIXSIZE 1000
#define STACKSIZE 10000
#define CHATLEN 2048
#include <syslog.h>
int r = 0, i = 0, mode = -1;
wchar_t mybuf[CHATLEN], tmbuf[CHATLEN];
WINDOW *me;
WINDOW *them;
struct stuff {
unsigned int col, row, size, realsize;
pid_t childpid;
pid_t mainpid;
char matrix[MATRIXSIZE];
char nukeline[1024];
int nukesize;
int terminate;
struct massaskit {
int writechan;
int readchan;
int sockfd;
struct sockaddr_in server;
struct sockaddr_in writeclient;
struct sockaddr_in readclient;
int c;
struct hostent *serverhost;
char hostname[256];
uint16_t port;
} bertil;
};
pthread_mutex_t scr_mutex = PTHREAD_MUTEX_INITIALIZER;
pthread_t sendthread; // Thread that listens to user's typing, and
// puts the characters on the screen, and
// transmits them over the network.
pthread_t readthread; // Thread that reads characters from the network
// and shows them on the screen.
int srv1(void *ptr)
{
struct massaskit *sockstuff = (struct massaskit *)ptr;
int opt = 1;
if ((sockstuff->sockfd = socket(AF_INET, SOCK_STREAM, 0)) == -1)
{
perror("socket();");
exit(-1);
}
sockstuff->server.sin_family = AF_INET;
sockstuff->server.sin_addr.s_addr = INADDR_ANY;
sockstuff->server.sin_port = htons(sockstuff->port);
setsockopt(sockstuff->sockfd, SOCK_STREAM, SO_REUSEADDR, &opt,
sizeof(opt));
if (bind
(sockstuff->sockfd, (struct sockaddr *)&sockstuff->server,
sizeof(sockstuff->server)) < 0) {
perror("bind failed");
exit(-1);
}
if ((listen(sockstuff->sockfd, 3)) < 0)
{
perror("listen");
exit(-1);
}
sockstuff->c = sizeof(struct sockaddr_in);
printf("waiting for readchan on %i sockstuff->port..\n",
sockstuff->port);
sockstuff->readchan =
accept(sockstuff->sockfd,
(struct sockaddr *)&sockstuff->readclient,
(socklen_t *) & sockstuff->c);
printf("got a connection! now need a connection on writechan (p:%i)\n",
sockstuff->port);
sockstuff->writechan =
accept(sockstuff->sockfd,
(struct sockaddr *)&sockstuff->writeclient,
(socklen_t *) & sockstuff->c);
printf("got a connection! both read/write (p:%i)\n", sockstuff->port);
shutdown(sockstuff->writechan, SHUT_RD);
shutdown(sockstuff->readchan, SHUT_WR);
if (close(sockstuff->sockfd) != 0)
{
exit(1);
}
return 0;
}
int cli1(void *ptr)
{
/* srv1 starts with readchan, we start with writechan :-) */
struct massaskit *sockstuff = (struct massaskit *)ptr;
int opt = 1;
sockstuff->sockfd = -1; /* make it broken so other function understand */
if ((sockstuff->writechan = socket(AF_INET, SOCK_STREAM, 0)) == -1)
{
perror("writechan->socket()");
exit(-1);
}
else
{
printf("socket init is ok.got fd[%i] [writechan]\n",
sockstuff->writechan);
}
setsockopt(sockstuff->writechan, SOCK_STREAM, SO_REUSEADDR, &opt,
sizeof(opt));
if ((sockstuff->serverhost =
gethostbyname(sockstuff->hostname)) == NULL) {
perror("error in resolving hostname :/\n");
exit(-1);
}
else
{
printf("ok, resolved host, now making connection [writechan]!\n");
}
memset(&sockstuff->server, '[=10=]', sizeof(struct in_addr));
sockstuff->server.sin_family = AF_INET;
memcpy(&sockstuff->server.sin_addr.s_addr,
sockstuff->serverhost->h_addr,
(size_t) sockstuff->serverhost->h_length);
sockstuff->server.sin_port = htons(sockstuff->port);
if (connect
(sockstuff->writechan, (struct sockaddr *)&sockstuff->server,
sizeof(sockstuff->server)) == -1) {
perror("connection");
exit(-1);
}
else
{
printf("%s%s", "writechan established,starting readchan and", "sleeping 2s so other end can initalize the readchan.\n");
}
if ((sockstuff->readchan = socket(AF_INET, SOCK_STREAM, 0)) == -1)
{
perror("socket();");
exit(-1);
}
else
{
printf("readchan socket init ok.\n");
fflush(stdout);
}
setsockopt(sockstuff->readchan, SOCK_STREAM, SO_REUSEADDR, &opt,
sizeof(opt));
if ((sockstuff->serverhost = gethostbyname(sockstuff->hostname)) == NULL)
{
perror("error in recieve channel, could'nt resolve host bailing.\n");
exit(-1);
}
else
{
printf("readchan could resolve host nice shit alabama\n");
fflush(stdout);
}
memset(&sockstuff->server, '[=10=]', sizeof(struct in_addr));
sockstuff->server.sin_family = AF_INET;
memcpy(&sockstuff->server.sin_addr.s_addr,
sockstuff->serverhost->h_addr,
(size_t) sockstuff->serverhost->h_length);
sockstuff->server.sin_port = htons(sockstuff->port);
if (connect
(sockstuff->readchan, (struct sockaddr *)&sockstuff->server,
sizeof(sockstuff->server)) == -1) {
perror("connect()");
exit(-1);
}
else
{
printf("read chan estabiled. starting program!\n");
fflush(stdout);
}
return 0;
}
void putch(WINDOW * win, wchar_t ch)
{
syslog(LOG_INFO, "%04x", ch);
if (ch == 4 || ch == 7) // Translate left-arrow, backspace to CTL-H
ch = '\b';
if(ch < ' ' && ch != '\t' &&
ch != '\n' && ch != '\b'
)
{
return;
}
pthread_mutex_lock(&scr_mutex); // Get exclusive access to screen.
wechochar(win, ch);
if (ch == '\b')
{
wdelch(win);
refresh();
}
pthread_mutex_unlock(&scr_mutex);
}
void setupscreen()
{
int rows, cols;
initscr();
cbreak();
noecho();
intrflush(stdscr, FALSE);
rows = (LINES - 3) / 2;
cols = COLS - 2;
me = newwin(rows, cols, 1, 1);
them = newwin(rows, cols, rows + 2, 1);
idlok(me, TRUE);
scrollok(me, TRUE);
keypad(me, TRUE);
idlok(them, TRUE);
scrollok(them, TRUE);
border(0, 0, 0, 0, 0, 0, 0, 0);
move(rows + 1, 1);
hline(0, cols);
refresh();
}
void* sender(void *ptr) {
struct stuff *s = (struct stuff *)ptr;
setupscreen();
int ch;
while (1)
{
if (i > CHATLEN - 1)
{
i = 0;
}
ch = wgetch(me);
mybuf[i] = ch;
if (ch == KEY_RESIZE)
{
clear();
endwin();
setupscreen();
wchar_t *p = &mybuf[0];
while (&(*p) < &mybuf[CHATLEN - 1])
{
putch(me, (*p));
p++;
}
p = &tmbuf[0];
while (&(*p) < &tmbuf[CHATLEN - 1])
{
putch(them, (*p));
p++;
}
refresh();
}
else
{
putch(me, mybuf[i]);
int writefd = s->bertil.writechan;
write(writefd, &mybuf[i], sizeof(mybuf[i]));
}
i++;
}
pthread_cancel(sendthread);
return NULL;
}
void* reader(void *ptr) {
struct stuff *s = (struct stuff *)ptr;
int ch;
while(1)
{
if(r> CHATLEN - 1)
{
r = 0;
}
int readfd=s->bertil.readchan;
if((read(readfd,&ch,sizeof(ch))) == 0)
{
endwin();
refresh();
return 0;
}
tmbuf[r] = ch;
putch(them, tmbuf[r]);
r++;
}
pthread_cancel(readthread);
return NULL;
}
int main(int argc, char *argv[])
{
setlocale(LC_ALL, "sv_SE");
memset(mybuf, 0, CHATLEN);
memset(tmbuf, 0, CHATLEN);
struct stuff s;
memset(&s, 0, sizeof(struct stuff));
if (argc == 1)
{
printf("usage %s port [host server on port]\n", argv[0]);
printf("usage %s port host [connecto host:port]\n", argv[0]);
exit(1);
}
else if (argc == 3)
{
s.bertil.port = (uint16_t) atoi(argv[1]);
memset(s.bertil.hostname, 0, 256);
memcpy(s.bertil.hostname, argv[2], strlen(argv[2]));
cli1(&s.bertil);
}
else if (argc == 2)
{
s.bertil.port = (uint16_t) atoi(argv[1]);
srv1(&s.bertil);
}
pthread_create(&readthread, NULL, reader, &s);
pthread_create(&sendthread, NULL, sender, &s);
pthread_join(sendthread, NULL);
pthread_join(readthread,NULL);
}
如果你想试用程序编译如下：
gcc file.c -lpthread -lncurses
服务：
./a.out 1234
要连接：
./a.out 1234 localhost
如有任何帮助，我们将不胜感激！
尝试在您的函数中使用 unsigned char 而不是 int。
在putch中，你不需要wchar_t，unsigned char（一个字节）在UTF-8中就可以了（http://www.science.co.il/language/Character-code.asp?s=1252）。
其实wchar_t位就够了，符号扩展问题不太可能出现。
但是，在两个线程（sender 和 reader）中使用 ncurses 的应用程序，除非您对其进行了特殊编译并允许互斥锁，否则它不会很好地工作。 ncurses（就像 curses 的任何实现一样）使用全局变量来维护屏幕。多个线程将以意想不到的方式运行库。
延伸阅读：
- Official releases（ncurses 常见问题解答）：
5.7 (2 November 2008). This provides rudimentary support for threaded applications. It also distributes tack separately.
curs_threads - curses thread support（ncurses 手册页）
我对在 UNIX-talk 克隆中正确打印 UTF-8 和瑞典语字符 ÅÄÖ 时遇到的问题感到困惑。
我已经使用 setLocale() 将语言环境设置为 sv_SE，并且我正在使用宽字符来尝试正确显示字符，小写 åäö 工作得很好，但不知何故大写变体不起作用。
下面是完整的代码，我怀疑 reader() sender() 或 putch() 中的字符大小缺少某些内容。
#define _GNU_SOURCE
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <ncurses.h>
#include <pthread.h>
#include <signal.h>
#include <netdb.h>
#include <arpa/inet.h>
#include <sched.h>
#include <pthread.h>
#include <locale.h>
#include <wchar.h>
#define MATRIXSIZE 1000
#define STACKSIZE 10000
#define CHATLEN 2048
#include <syslog.h>
int r = 0, i = 0, mode = -1;
wchar_t mybuf[CHATLEN], tmbuf[CHATLEN];
WINDOW *me;
WINDOW *them;
struct stuff {
unsigned int col, row, size, realsize;
pid_t childpid;
pid_t mainpid;
char matrix[MATRIXSIZE];
char nukeline[1024];
int nukesize;
int terminate;
struct massaskit {
int writechan;
int readchan;
int sockfd;
struct sockaddr_in server;
struct sockaddr_in writeclient;
struct sockaddr_in readclient;
int c;
struct hostent *serverhost;
char hostname[256];
uint16_t port;
} bertil;
};
pthread_mutex_t scr_mutex = PTHREAD_MUTEX_INITIALIZER;
pthread_t sendthread; // Thread that listens to user's typing, and
// puts the characters on the screen, and
// transmits them over the network.
pthread_t readthread; // Thread that reads characters from the network
// and shows them on the screen.
int srv1(void *ptr)
{
struct massaskit *sockstuff = (struct massaskit *)ptr;
int opt = 1;
if ((sockstuff->sockfd = socket(AF_INET, SOCK_STREAM, 0)) == -1)
{
perror("socket();");
exit(-1);
}
sockstuff->server.sin_family = AF_INET;
sockstuff->server.sin_addr.s_addr = INADDR_ANY;
sockstuff->server.sin_port = htons(sockstuff->port);
setsockopt(sockstuff->sockfd, SOCK_STREAM, SO_REUSEADDR, &opt,
sizeof(opt));
if (bind
(sockstuff->sockfd, (struct sockaddr *)&sockstuff->server,
sizeof(sockstuff->server)) < 0) {
perror("bind failed");
exit(-1);
}
if ((listen(sockstuff->sockfd, 3)) < 0)
{
perror("listen");
exit(-1);
}
sockstuff->c = sizeof(struct sockaddr_in);
printf("waiting for readchan on %i sockstuff->port..\n",
sockstuff->port);
sockstuff->readchan =
accept(sockstuff->sockfd,
(struct sockaddr *)&sockstuff->readclient,
(socklen_t *) & sockstuff->c);
printf("got a connection! now need a connection on writechan (p:%i)\n",
sockstuff->port);
sockstuff->writechan =
accept(sockstuff->sockfd,
(struct sockaddr *)&sockstuff->writeclient,
(socklen_t *) & sockstuff->c);
printf("got a connection! both read/write (p:%i)\n", sockstuff->port);
shutdown(sockstuff->writechan, SHUT_RD);
shutdown(sockstuff->readchan, SHUT_WR);
if (close(sockstuff->sockfd) != 0)
{
exit(1);
}
return 0;
}
int cli1(void *ptr)
{
/* srv1 starts with readchan, we start with writechan :-) */
struct massaskit *sockstuff = (struct massaskit *)ptr;
int opt = 1;
sockstuff->sockfd = -1; /* make it broken so other function understand */
if ((sockstuff->writechan = socket(AF_INET, SOCK_STREAM, 0)) == -1)
{
perror("writechan->socket()");
exit(-1);
}
else
{
printf("socket init is ok.got fd[%i] [writechan]\n",
sockstuff->writechan);
}
setsockopt(sockstuff->writechan, SOCK_STREAM, SO_REUSEADDR, &opt,
sizeof(opt));
if ((sockstuff->serverhost =
gethostbyname(sockstuff->hostname)) == NULL) {
perror("error in resolving hostname :/\n");
exit(-1);
}
else
{
printf("ok, resolved host, now making connection [writechan]!\n");
}
memset(&sockstuff->server, '[=10=]', sizeof(struct in_addr));
sockstuff->server.sin_family = AF_INET;
memcpy(&sockstuff->server.sin_addr.s_addr,
sockstuff->serverhost->h_addr,
(size_t) sockstuff->serverhost->h_length);
sockstuff->server.sin_port = htons(sockstuff->port);
if (connect
(sockstuff->writechan, (struct sockaddr *)&sockstuff->server,
sizeof(sockstuff->server)) == -1) {
perror("connection");
exit(-1);
}
else
{
printf("%s%s", "writechan established,starting readchan and", "sleeping 2s so other end can initalize the readchan.\n");
}
if ((sockstuff->readchan = socket(AF_INET, SOCK_STREAM, 0)) == -1)
{
perror("socket();");
exit(-1);
}
else
{
printf("readchan socket init ok.\n");
fflush(stdout);
}
setsockopt(sockstuff->readchan, SOCK_STREAM, SO_REUSEADDR, &opt,
sizeof(opt));
if ((sockstuff->serverhost = gethostbyname(sockstuff->hostname)) == NULL)
{
perror("error in recieve channel, could'nt resolve host bailing.\n");
exit(-1);
}
else
{
printf("readchan could resolve host nice shit alabama\n");
fflush(stdout);
}
memset(&sockstuff->server, '[=10=]', sizeof(struct in_addr));
sockstuff->server.sin_family = AF_INET;
memcpy(&sockstuff->server.sin_addr.s_addr,
sockstuff->serverhost->h_addr,
(size_t) sockstuff->serverhost->h_length);
sockstuff->server.sin_port = htons(sockstuff->port);
if (connect
(sockstuff->readchan, (struct sockaddr *)&sockstuff->server,
sizeof(sockstuff->server)) == -1) {
perror("connect()");
exit(-1);
}
else
{
printf("read chan estabiled. starting program!\n");
fflush(stdout);
}
return 0;
}
void putch(WINDOW * win, wchar_t ch)
{
syslog(LOG_INFO, "%04x", ch);
if (ch == 4 || ch == 7) // Translate left-arrow, backspace to CTL-H
ch = '\b';
if(ch < ' ' && ch != '\t' &&
ch != '\n' && ch != '\b'
)
{
return;
}
pthread_mutex_lock(&scr_mutex); // Get exclusive access to screen.
wechochar(win, ch);
if (ch == '\b')
{
wdelch(win);
refresh();
}
pthread_mutex_unlock(&scr_mutex);
}
void setupscreen()
{
int rows, cols;
initscr();
cbreak();
noecho();
intrflush(stdscr, FALSE);
rows = (LINES - 3) / 2;
cols = COLS - 2;
me = newwin(rows, cols, 1, 1);
them = newwin(rows, cols, rows + 2, 1);
idlok(me, TRUE);
scrollok(me, TRUE);
keypad(me, TRUE);
idlok(them, TRUE);
scrollok(them, TRUE);
border(0, 0, 0, 0, 0, 0, 0, 0);
move(rows + 1, 1);
hline(0, cols);
refresh();
}
void* sender(void *ptr) {
struct stuff *s = (struct stuff *)ptr;
setupscreen();
int ch;
while (1)
{
if (i > CHATLEN - 1)
{
i = 0;
}
ch = wgetch(me);
mybuf[i] = ch;
if (ch == KEY_RESIZE)
{
clear();
endwin();
setupscreen();
wchar_t *p = &mybuf[0];
while (&(*p) < &mybuf[CHATLEN - 1])
{
putch(me, (*p));
p++;
}
p = &tmbuf[0];
while (&(*p) < &tmbuf[CHATLEN - 1])
{
putch(them, (*p));
p++;
}
refresh();
}
else
{
putch(me, mybuf[i]);
int writefd = s->bertil.writechan;
write(writefd, &mybuf[i], sizeof(mybuf[i]));
}
i++;
}
pthread_cancel(sendthread);
return NULL;
}
void* reader(void *ptr) {
struct stuff *s = (struct stuff *)ptr;
int ch;
while(1)
{
if(r> CHATLEN - 1)
{
r = 0;
}
int readfd=s->bertil.readchan;
if((read(readfd,&ch,sizeof(ch))) == 0)
{
endwin();
refresh();
return 0;
}
tmbuf[r] = ch;
putch(them, tmbuf[r]);
r++;
}
pthread_cancel(readthread);
return NULL;
}
int main(int argc, char *argv[])
{
setlocale(LC_ALL, "sv_SE");
memset(mybuf, 0, CHATLEN);
memset(tmbuf, 0, CHATLEN);
struct stuff s;
memset(&s, 0, sizeof(struct stuff));
if (argc == 1)
{
printf("usage %s port [host server on port]\n", argv[0]);
printf("usage %s port host [connecto host:port]\n", argv[0]);
exit(1);
}
else if (argc == 3)
{
s.bertil.port = (uint16_t) atoi(argv[1]);
memset(s.bertil.hostname, 0, 256);
memcpy(s.bertil.hostname, argv[2], strlen(argv[2]));
cli1(&s.bertil);
}
else if (argc == 2)
{
s.bertil.port = (uint16_t) atoi(argv[1]);
srv1(&s.bertil);
}
pthread_create(&readthread, NULL, reader, &s);
pthread_create(&sendthread, NULL, sender, &s);
pthread_join(sendthread, NULL);
pthread_join(readthread,NULL);
}
如果你想试用程序编译如下：
gcc file.c -lpthread -lncurses
服务：
./a.out 1234
要连接：
./a.out 1234 localhost
如有任何帮助，我们将不胜感激！
尝试在您的函数中使用 unsigned char 而不是 int。
在putch中，你不需要wchar_t，unsigned char（一个字节）在UTF-8中就可以了（http://www.science.co.il/language/Character-code.asp?s=1252）。
其实wchar_t位就够了，符号扩展问题不太可能出现。
但是，在两个线程（sender 和 reader）中使用 ncurses 的应用程序，除非您对其进行了特殊编译并允许互斥锁，否则它不会很好地工作。 ncurses（就像 curses 的任何实现一样）使用全局变量来维护屏幕。多个线程将以意想不到的方式运行库。
延伸阅读：
- Official releases（ncurses 常见问题解答）：
5.7 (2 November 2008). This provides rudimentary support for threaded applications. It also distributes tack separately.
curs_threads- curses thread support（ncurses 手册页）