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/*
* Edit buffer single line update core loop (twice)
* Copyright © 1992 Joseph H. Allen
* Copyright © 2018 mirabilos
*
* This file is part of jupp (Joe’s Own Editor fork)
*/
#ifdef LGEN_Q
__IDSTRING(rcsid_bw_lgen_inc, "$MirOS: contrib/code/jupp/bw-lgen.inc,v 1.6 2020/03/27 06:08:11 tg Exp $");
#define XCOL col
#else
#define XCOL (scr + x - ox)
#endif
LGEN_LABEL(loop):
/* Display next character */
if (!amnt)
goto LGEN_LABEL(noamnt);
do {
if (ungetit == -1)
bc = *bp++;
else {
bc = ungetit;
ungetit = -1;
}
if (st != -1)
atr = syn[idx++];
if (utf8_sm.state && !(bc & 0x80))
goto LGEN_LABEL(ilseq);
if (p->b->o.crlf && bc == '\r') {
++byte;
if (!--amnt) {
LGEN_LABEL(pl):
if (bp == p->ptr + SEGSIZ) {
if (pnext(p)) {
bp = p->ptr;
amnt = p->hdr->hole;
} else
goto LGEN_LABEL(nl);
} else {
bp = p->ptr + p->hdr->ehole;
amnt = SEGSIZ - p->hdr->ehole;
if (!amnt)
goto LGEN_LABEL(pl);
}
}
if (*bp == '\n') {
++bp;
++byte;
++amnt;
goto eobl;
}
LGEN_LABEL(nl):
--byte;
++amnt;
}
if (square)
if (bc == '\t') {
long tcol = XCOL + p->b->o.tab -
(XCOL % p->b->o.tab);
if (tcol > from && tcol <= to)
c1 = INVERSE;
else
c1 = 0;
} else if (XCOL >= from && XCOL < to)
c1 = INVERSE;
else
c1 = 0;
else if (byte >= from && byte < to)
c1 = INVERSE;
else
c1 = 0;
++byte;
if (bc == '\t') {
ta = p->b->o.tab - (XCOL % p->b->o.tab);
#ifdef LGEN_Q
if (ta + col > scr) {
ta -= scr - col;
goto dota_tab;
}
if ((col += ta) == scr) {
--amnt;
goto v_loop;
}
#else
dota_tab:
tach1 = tach = ' ';
if (bw->o.vispace)
tach = 0x2192;
goto dota_gen;
dota_loop:
tach = tach1;
dota_gen:
outatr(utf8_map, t, screen + x, attr + x,
x, y, tach, c1 | atr);
if (have)
goto bye;
if (++x == w)
goto eosl;
if (--ta)
goto dota_loop;
#endif
} else if (bc == '\n') {
goto eobl;
} else {
int wid = -1;
/*
* should be joe_maputf(p->b->o.charmap) logically
* but they are identical here, and it helps
* static analysers like Coverity
*/
if (joe_maputf(bw->b->o.charmap)) {
/* UTF-8 */
c = utf8_decode(&utf8_sm, bc);
if (c >= 0) {
/* Normal decoded character */
wid = joe_wcwidth(c);
} else if (c == -1) {
/* Character taken */
wid = -1;
} else if (c == -2) {
/* Incomplete sequence */
--byte;
LGEN_LABEL(ilseq):
++amnt;
ungetit = bc;
c = 0x1000FFFE;
wid = utf8_sm.ptr;
utf8_init(&utf8_sm);
} else if (c == -3) {
/* Invalid byte */
c = 0x1000FFFE;
wid = 1;
}
} else {
/* 8-bit charmap */
c = bc;
wid = 1;
}
if (wid >= 0) {
#ifdef LGEN_Q
col += wid;
if (col == scr) {
--amnt;
goto v_loop;
} else if (col > scr) {
ta = col - scr;
tach1 = tach = '<';
goto dota_gen;
}
#else
if (x + wid > w) {
/* Character hits rightmost column */
while (x < w) {
/* Display offscreen marker */
outatr(bw->b->o.charmap,
t, screen + x, attr + x,
x, y, '>', c1 | atr);
x++;
}
} else if (c == 0x1000FFFE) while (wid--) {
outatr(bw->b->o.charmap, t,
screen + x, attr + x,
x, y, 0xFFFD,
(c1 | atr | UNDERLINE) ^ INVERSE);
x++;
} else if (c == 0x20 && bw->o.vispace) {
outatr(utf8_map, t,
screen + x, attr + x,
x, y, 0xB7, c1 | atr);
x++;
} else {
outatr(bw->b->o.charmap, t,
screen + x, attr + x,
x, y, c, c1 | atr);
x += wid;
}
#endif
} else
/* Get highlighting character again */
--idx;
#ifndef LGEN_Q
if (have)
goto bye;
if (x >= w)
goto eosl;
#endif
}
} while (--amnt);
LGEN_LABEL(noamnt):
if (bp == p->ptr + SEGSIZ) {
if (pnext(p)) {
bp = p->ptr;
amnt = p->hdr->hole;
goto LGEN_LABEL(loop);
}
} else {
bp = p->ptr + p->hdr->ehole;
amnt = SEGSIZ - p->hdr->ehole;
goto LGEN_LABEL(loop);
}
if (utf8_sm.state)
goto LGEN_LABEL(ilseq);
goto eof;
#undef XCOL
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