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Read multiple bytes from serial port

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Don't read a single byte at a time from the serial port. Read
multiple (up to TTY_RD_SZ = 128) bytes with a single read(2) call. Also
write multiple bytes to the terminal (STO) with a single write(2) call.
This commit is contained in:
Nick Patavalis
2015-10-23 11:36:04 +03:00
parent 1b8a9e42af
commit 764b86ca31
1 changed files with 14 additions and 2 deletions
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16
picocom.c
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@ -226,6 +226,8 @@ struct tty_q {
unsigned char buff[TTY_Q_SZ];
} tty_q;
#define TTY_RD_SZ 128
int tty_write_sz;
#define TTY_WRITE_SZ_DIV 10
@ -1140,10 +1142,13 @@ loop(void)
if ( FD_ISSET(tty_fd, &rdset) ) {
char buff_rd[TTY_RD_SZ];
char buff_map[TTY_RD_SZ * M_MAXMAP];
/* read from port */
do {
n = read(tty_fd, &c, 1);
n = read(tty_fd, &buff_rd, sizeof(buff_rd));
} while (n < 0 && errno == EINTR);
if (n == 0) {
fatal("term closed");
@ -1151,7 +1156,14 @@ loop(void)
if ( errno != EAGAIN && errno != EWOULDBLOCK )
fatal("read from term failed: %s", strerror(errno));
} else {
map_and_write(STO, opts.imap, c);
int i;
char *bmp = &buff_map[0];
for (i = 0; i < n; i++) {
bmp += do_map(bmp, opts.imap, buff_rd[i]);
}
n = bmp - buff_map;
if ( writen_ni(STO, buff_map, n) < n )
fatal("write to stdout failed: %s", strerror(errno));
}
}