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Factor out equivalent code from ttyread/ttysend

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The echo-to-terminal portions of ttyread and ttysend were actually doing
the same thing.  New function twrite() now handles this.  The parameter
show_ctrl determines whether control characters are shown as "^A".  This
was the only difference between tputc and techo, and techo is now unused
and removed.

(This commit should not change st's behaviour.)

Signed-off-by: Devin J. Pohly <djpohly@gmail.com>
This commit is contained in:
Devin J. Pohly 2017-10-15 20:35:48 -05:00
parent 69e32a61df
commit 32d3b1d00f
2 changed files with 41 additions and 62 deletions
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101
st.c
View File

@ -161,8 +161,8 @@ static void tsetchar(Rune, Glyph *, int, int);
static void tsetscroll(int, int);
static void tswapscreen(void);
static void tsetmode(int, int, int *, int);
static int twrite(const char *, int, int);
static void tfulldirt(void);
static void techo(Rune);
static void tcontrolcode(uchar );
static void tdectest(char );
static void tdefutf8(char);
@ -254,7 +254,7 @@ xstrdup(char *s)
}
size_t
utf8decode(char *c, Rune *u, size_t clen)
utf8decode(const char *c, Rune *u, size_t clen)
{
size_t i, j, len, type;
Rune udecoded;
@ -768,38 +768,19 @@ ttyread(void)
{
static char buf[BUFSIZ];
static int buflen = 0;
char *ptr;
int charsize; /* size of utf8 char in bytes */
Rune unicodep;
int written;
int ret;
/* append read bytes to unprocessed bytes */
if ((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
die("Couldn't read from shell: %s\n", strerror(errno));
buflen += ret;
ptr = buf;
for (;;) {
if (IS_SET(MODE_UTF8) && !IS_SET(MODE_SIXEL)) {
/* process a complete utf8 char */
charsize = utf8decode(ptr, &unicodep, buflen);
if (charsize == 0)
break;
tputc(unicodep);
ptr += charsize;
buflen -= charsize;
} else {
if (buflen <= 0)
break;
tputc(*ptr++ & 0xFF);
buflen--;
}
}
written = twrite(buf, buflen, 0);
buflen -= written;
/* keep any uncomplete utf8 char for the next call */
if (buflen > 0)
memmove(buf, ptr, buflen);
memmove(buf, buf + written, buflen);
return ret;
}
@ -864,27 +845,9 @@ write_error:
void
ttysend(char *s, size_t n)
{
int len;
char *t, *lim;
Rune u;
ttywrite(s, n);
if (!IS_SET(MODE_ECHO))
return;
lim = &s[n];
for (t = s; t < lim; t += len) {
if (IS_SET(MODE_UTF8) && !IS_SET(MODE_SIXEL)) {
len = utf8decode(t, &u, n);
} else {
u = *t & 0xFF;
len = 1;
}
if (len <= 0)
break;
techo(u);
n -= len;
}
if (IS_SET(MODE_ECHO))
twrite(s, n, 1);
}
void
@ -2031,22 +1994,6 @@ tputtab(int n)
term.c.x = LIMIT(x, 0, term.col-1);
}
void
techo(Rune u)
{
if (ISCONTROL(u)) { /* control code */
if (u & 0x80) {
u &= 0x7f;
tputc('^');
tputc('[');
} else if (u != '\n' && u != '\r' && u != '\t') {
u ^= 0x40;
tputc('^');
}
}
tputc(u);
}
void
tdefutf8(char ascii)
{
@ -2437,6 +2384,38 @@ check_control_code:
}
}
int
twrite(const char *buf, int buflen, int show_ctrl)
{
int charsize;
Rune u;
int n;
for (n = 0; n < buflen; n += charsize) {
if (IS_SET(MODE_UTF8) && !IS_SET(MODE_SIXEL)) {
/* process a complete utf8 char */
charsize = utf8decode(buf + n, &u, buflen - n);
if (charsize == 0)
break;
} else {
u = buf[n] & 0xFF;
charsize = 1;
}
if (show_ctrl && ISCONTROL(u)) {
if (u & 0x80) {
u &= 0x7f;
tputc('^');
tputc('[');
} else if (u != '\n' && u != '\r' && u != '\t') {
u ^= 0x40;
tputc('^');
}
}
tputc(u);
}
return n;
}
void
tresize(int col, int row)
{

2
st.h
View File

@ -209,7 +209,7 @@ void selnormalize(void);
int selected(int, int);
char *getsel(void);
size_t utf8decode(char *, Rune *, size_t);
size_t utf8decode(const char *, Rune *, size_t);
size_t utf8encode(Rune, char *);
void *xmalloc(size_t);