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Differential D55365 Diff 172961 bin/ed/io.c

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bin/ed/io.c

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/* put_tty_line: print text to stdout */ /* put_tty_line: print text to stdout */
int int
put_tty_line(const char *s, int l, long n, int gflag) put_tty_line(const char *s, int l, long n, int gflag)
{ {
int col = 0; int col = 0;
int lc = 0; int lc = 0;
char *cp; char *cp;
wchar_t wc;
mbstate_t mbs;
size_t clen;
int w;
if (gflag & GNP) { if (gflag & GNP) {
printf("%ld\t", n); printf("%ld\t", n);
col = 8; col = 8;
} }
for (; l--; s++) { for (; l > 0;) {
if ((gflag & GLS) && ++col > cols) { if (!(gflag & GLS)) {
putchar(*s++);
l--;
continue;
}
/* GLS mode: try to decode a multibyte character */
memset(&mbs, 0, sizeof(mbs));
clen = mbrtowc(&wc, s, l, &mbs);
if (clen != (size_t)-1 && clen != (size_t)-2 &&
clen > 1 && iswprint(wc) && (w = wcwidth(wc)) >= 0) {
/* printable multibyte character */
if (col + w > cols) {
fputs("\\\n", stdout); fputs("\\\n", stdout);
col = 0;
#ifndef BACKWARDS
if (!scripted && !isglobal && ++lc > rows) {
lc = 0;
fputs("Press <RETURN> to continue... ",
stdout);
fflush(stdout);
if (get_tty_line() < 0)
return ERR;
}
#endif
}
col += w;
fwrite(s, 1, clen, stdout);
s += clen;
l -= clen;
continue;
}
/* single byte: ASCII printable, escape sequence, or octal */
if (++col > cols) {
fputs("\\\n", stdout);
col = 1; col = 1;
#ifndef BACKWARDS #ifndef BACKWARDS
if (!scripted && !isglobal && ++lc > rows) { if (!scripted && !isglobal && ++lc > rows) {
lc = 0; lc = 0;
fputs("Press <RETURN> to continue... ", stdout); fputs("Press <RETURN> to continue... ", stdout);
fflush(stdout); fflush(stdout);
if (get_tty_line() < 0) if (get_tty_line() < 0)
return ERR; return ERR;
} }
#endif #endif
} }
if (gflag & GLS) {
if (31 < *s && *s < 127 && *s != '\\') if (31 < *s && *s < 127 && *s != '\\')
putchar(*s); putchar(*s);
else { else {
putchar('\\'); putchar('\\');
col++; col++;
if (*s && (cp = strchr(ESCAPES, *s)) != NULL) if (*s && (cp = strchr(ESCAPES, *s)) != NULL)
putchar(ESCCHARS[cp - ESCAPES]); putchar(ESCCHARS[cp - ESCAPES]);
else { else {
putchar((((unsigned char) *s & 0300) >> 6) + '0'); putchar((((unsigned char) *s & 0300) >> 6) + '0');
putchar((((unsigned char) *s & 070) >> 3) + '0'); putchar((((unsigned char) *s & 070) >> 3) + '0');
putchar(((unsigned char) *s & 07) + '0'); putchar(((unsigned char) *s & 07) + '0');
col += 2; col += 2;
} }
} }
s++;
} else l--;
putchar(*s);
} }
#ifndef BACKWARDS #ifndef BACKWARDS
if (gflag & GLS) if (gflag & GLS)
putchar('$'); putchar('$');
#endif #endif
putchar('\n'); putchar('\n');
return 0; return 0;
} }