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pty.c
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pty.c
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/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
│ vi: set et ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi │
╞══════════════════════════════════════════════════════════════════════════════╡
│ Copyright 2022 Justine Alexandra Roberts Tunney │
│ │
│ Permission to use, copy, modify, and/or distribute this software for │
│ any purpose with or without fee is hereby granted, provided that the │
│ above copyright notice and this permission notice appear in all copies. │
│ │
│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
│ PERFORMANCE OF THIS SOFTWARE. │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "blink/pty.h"
#include <ctype.h>
#include <errno.h>
#include <limits.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <wchar.h>
#include "blink/assert.h"
#include "blink/builtin.h"
#include "blink/endian.h"
#include "blink/macros.h"
#include "blink/thompike.h"
#include "blink/util.h"
#ifdef IUTF8
#define CURSOR L'▂'
#else
#define CURSOR '_'
#endif
/**
* @fileoverview Pseudoteletypewriter
*
* \t TAB
* \a BELL
* \177 BACKSPACE
* \r CURSOR START
* \b CURSOR LEFT OR CURSOR REWIND
* \n CURSOR DOWN AND START IF OPOST
* \f CURSOR DOWN AND START IF OPOST
* \v CURSOR DOWN AND START OR \e[H\e[J
* \eE CURSOR DOWN AND START
* \eD CURSOR DOWN
* \eM CURSOR UP
* \ec FULL RESET
* \e7 SAVE CURSOR POSITION
* \e8 RESTORE CURSOR POSITION
* \e(0 DEC SPECIAL GRAPHICS
* \e(B USAS X3.4-1967
* \e#5 SINGLE WIDTH
* \e#6 DOUBLE WIDTH
* \e#8 SO MANY E
* \eZ → \e/Z REPORT IDENTITY
* \e[𝑛A CURSOR UP [CLAMPED]
* \e[𝑛B CURSOR DOWN [CLAMPED]
* \e[𝑛C CURSOR RIGHT [CLAMPED]
* \e[𝑛D CURSOR LEFT [CLAMPED]
* \e[𝑦;𝑥H SET CURSOR POSITION [CLAMPED]
* \e[𝑥G SET CURSOR COLUMN [CLAMPED]
* \e[𝑦d SET CURSOR ROW [CLAMPED]
* \e[𝑛E CURSOR DOWN AND START [CLAMPED]
* \e[𝑛F CURSOR UP AND START [CLAMPED]
* \e[𝑛S SCROLL UP
* \e[𝑛T SCROLL DOWN
* \e[𝑛@ INSERT CELLS
* \e[𝑛P DELETE CELLS
* \e[𝑛L INSERT LINES
* \e[𝑛M DELETE LINES
* \e[J ERASE DISPLAY FORWARDS
* \e[1J ERASE DISPLAY BACKWARDS
* \e[2J ERASE DISPLAY
* \e[K ERASE LINE FORWARD
* \e[1K ERASE LINE BACKWARD
* \e[2K ERASE LINE
* \e[𝑛X ERASE CELLS
* \e[0m RESET
* \e[1m BOLD
* \e[2m FAINT
* \e[3m ITALIC
* \e[4m UNDER
* \e[5m BLINK
* \e[7m INVERT
* \e[8m CONCEAL
* \e[9m STRIKE
* \e[20m FRAKTUR
* \e[21m DUNDER
* \e[22m RESET BOLD & FAINT
* \e[23m RESET ITALIC & FRAKTUR
* \e[24m RESET UNDER & DUNDER
* \e[25m RESET BLINK
* \e[27m RESET INVERT
* \e[28m RESET CONCEAL
* \e[29m RESET STRIKE
* \e[39m RESET FOREGROUND
* \e[49m RESET BACKGROUND
* \e[30m BLACK FOREGROUND
* \e[31m RED FOREGROUND
* \e[32m GREEN FOREGROUND
* \e[33m YELLOW FOREGROUND
* \e[34m BLUE FOREGROUND
* \e[35m MAGENTA FOREGROUND
* \e[36m CYAN FOREGROUND
* \e[37m WHITE FOREGROUND
* \e[40m BLACK BACKGROUND
* \e[41m RED BACKGROUND
* \e[42m GREEN BACKGROUND
* \e[44m YELLOW BACKGROUND
* \e[44m BLUE BACKGROUND
* \e[45m MAGENTA BACKGROUND
* \e[46m CYAN BACKGROUND
* \e[47m WHITE BACKGROUND
* \e[90m BRIGHT BLACK FOREGROUND
* \e[91m BRIGHT RED FOREGROUND
* \e[92m BRIGHT GREEN FOREGROUND
* \e[93m BRIGHT YELLOW FOREGROUND
* \e[94m BRIGHT BLUE FOREGROUND
* \e[95m BRIGHT MAGENTA FOREGROUND
* \e[96m BRIGHT CYAN FOREGROUND
* \e[97m BRIGHT WHITE FOREGROUND
* \e[100m BRIGHT BLACK BACKGROUND
* \e[101m BRIGHT RED BACKGROUND
* \e[102m BRIGHT GREEN BACKGROUND
* \e[103m BRIGHT YELLOW BACKGROUND
* \e[104m BRIGHT BLUE BACKGROUND
* \e[105m BRIGHT MAGENTA BACKGROUND
* \e[106m BRIGHT CYAN BACKGROUND
* \e[107m BRIGHT WHITE BACKGROUND
* \e[38;5;𝑥m XTERM256 FOREGROUND
* \e[48;5;𝑥m XTERM256 BACKGROUND
* \e[38;2;𝑟;𝑔;𝑏m RGB FOREGROUND
* \e[48;2;𝑟;𝑔;𝑏m RGB BACKGROUND
* \e[?25h SHOW CURSOR
* \e[?25l HIDE CURSOR
* \e[s SAVE CURSOR POSITION
* \e[u RESTORE CURSOR POSITION
* \e[?5h ... \e[?5l REVERSE VIDEO EPILEPSY
* \e[0q RESET LEDS
* \e[1q TURN ON FIRST LED
* \e[2q TURN ON SECOND LED
* \e[3q TURN ON THIRD LED
* \e[4q TURN ON FOURTH LED
* \e[c → \e[?1;0c REPORT DEVICE TYPE
* \e[5n → \e[0n REPORT DEVICE STATUS
* \e[6n → \e[𝑦;𝑥R REPORT CURSOR POSITION
* \e7\e[9979;9979H\e[6n\e8 → \e[𝑦;𝑥R REPORT DISPLAY DIMENSIONS
*
* @see https://vt100.net/docs/vt220-rm/chapter4.html
* @see https://invisible-island.net/xterm/
* @see ANSI X3.64-1979
* @see ISO/IEC 6429
* @see FIPS-86
* @see ECMA-48
*/
struct Pty *NewPty(void) {
struct Pty *pty;
if ((pty = (struct Pty *)calloc(1, sizeof(*pty)))) {
PtyResize(pty, 25, 80);
PtyFullReset(pty);
PtyErase(pty, 0, pty->yn * pty->xn);
}
return pty;
}
static void FreePtyPlanes(struct Pty *pty) {
free(pty->wcs);
free(pty->fgs);
free(pty->bgs);
free(pty->prs);
}
void FreePty(struct Pty *pty) {
if (pty) {
FreePtyPlanes(pty);
free(pty);
}
}
static wchar_t *GetXlatAscii(void) {
unsigned i;
static bool once;
static wchar_t xlat[128];
if (!once) {
for (i = 0; i < 128; ++i) {
xlat[i] = i;
}
once = true;
}
return xlat;
}
static wchar_t *GetXlatLineDrawing(void) {
unsigned i;
static bool once;
static wchar_t xlat[128];
if (!once) {
for (i = 0; i < 128; ++i) {
if (0x5F <= i && i <= 0x7E) {
xlat[i] = L" ◆▒␉␌␍␊°±␋┘┐┌└┼⎺⎻─⎼⎽├┤┴┬│≤≥π≠£·"[i - 0x5F];
} else {
xlat[i] = i;
}
}
once = true;
}
return xlat;
}
static void XlatAlphabet(wchar_t xlat[128], int a, int b) {
unsigned i;
for (i = 0; i < 128; ++i) {
if ('a' <= i && i <= 'z') {
xlat[i] = i - 'a' + a;
} else if ('A' <= i && i <= 'Z') {
xlat[i] = i - 'A' + b;
} else {
xlat[i] = i;
}
}
}
static wchar_t *GetXlatItalic(void) {
static bool once;
static wchar_t xlat[128];
if (!once) {
#if WCHAR_MAX > 0x10000
XlatAlphabet(xlat, L'𝑎', L'𝐴');
#else
XlatAlphabet(xlat, L'a', L'A');
#endif
once = true;
}
return xlat;
}
static wchar_t *GetXlatBoldItalic(void) {
static bool once;
static wchar_t xlat[128];
if (!once) {
#if WCHAR_MAX > 0x10000
XlatAlphabet(xlat, L'𝒂', L'𝑨');
#else
XlatAlphabet(xlat, L'a', L'A');
#endif
once = true;
}
return xlat;
}
static wchar_t *GetXlatBoldFraktur(void) {
static bool once;
static wchar_t xlat[128];
if (!once) {
#if WCHAR_MAX > 0x10000
XlatAlphabet(xlat, L'𝖆', L'𝕬');
#else
XlatAlphabet(xlat, L'a', L'A');
#endif
once = true;
}
return xlat;
}
static wchar_t *GetXlatFraktur(void) {
unsigned i;
static bool once;
static wchar_t xlat[128];
if (!once) {
#if WCHAR_MAX > 0x10000
for (i = 0; i < ARRAYLEN(xlat); ++i) {
if ('A' <= i && i <= 'Z') {
xlat[i] = L"𝔄𝔅ℭ𝔇𝔈𝔉𝔊ℌℑ𝔍𝔎𝔏𝔐𝔑𝔒𝔓𝔔ℜ𝔖𝔗𝔘𝔙𝔚𝔛𝔜ℨ"[i - 'A'];
} else if ('a' <= i && i <= 'z') {
xlat[i] = i - 'a' + L'𝔞';
} else {
xlat[i] = i;
}
}
#else
XlatAlphabet(xlat, L'a', L'A');
#endif
once = true;
}
return xlat;
}
static wchar_t *GetXlatDoubleWidth(void) {
unsigned i;
static bool once;
static wchar_t xlat[128];
if (!once) {
for (i = 0; i < ARRAYLEN(xlat); ++i) {
if ('!' <= i && i <= '~') {
xlat[i] = -(i - '!' + L'！');
} else {
xlat[i] = i;
}
}
once = true;
}
return xlat;
}
static wchar_t *GetXlatSgr(struct Pty *pty) {
switch (!!(pty->pr & kPtyFraktur) << 2 | !!(pty->pr & kPtyItalic) << 1 |
!!(pty->pr & kPtyBold) << 0) {
case 4:
case 6:
return GetXlatFraktur();
case 5:
case 7:
return GetXlatBoldFraktur();
case 3:
return GetXlatBoldItalic();
case 2:
return GetXlatItalic();
default:
return GetXlatAscii();
}
}
static void PtySetXlat(struct Pty *pty, wchar_t *xlat) {
pty->xlat = xlat;
pty->pr &= ~(kPtyItalic | kPtyFraktur);
}
static void PtySetCodepage(struct Pty *pty, char id) {
switch (id) {
default:
case 'B':
PtySetXlat(pty, GetXlatAscii());
break;
case '0':
PtySetXlat(pty, GetXlatLineDrawing());
break;
}
}
static u32 *u32set(u32 *p, u32 c, size_t n) {
size_t i;
for (i = 0; i < n; ++i) {
p[i] = c;
}
return p;
}
void PtyErase(struct Pty *pty, long dst, long n) {
unassert(dst + n <= pty->yn * pty->xn);
u32set(pty->wcs + dst, ' ', n);
u32set(pty->prs + dst, 0, n);
}
void PtyMemmove(struct Pty *pty, long dst, long src, long n) {
unassert(src + n <= pty->yn * pty->xn);
unassert(dst + n <= pty->yn * pty->xn);
memmove(pty->wcs + dst, pty->wcs + src, n * 4);
memmove(pty->fgs + dst, pty->fgs + src, n * 4);
memmove(pty->bgs + dst, pty->bgs + src, n * 4);
memmove(pty->prs + dst, pty->prs + src, n * 4);
}
void PtyFullReset(struct Pty *pty) {
pty->y = 0;
pty->x = 0;
pty->pr = 0;
pty->u8 = 0;
pty->n8 = 0;
pty->conf = 0;
pty->save = 0;
pty->esc.i = 0;
pty->input.i = 0;
pty->state = kPtyAscii;
pty->xlat = GetXlatAscii();
PtyErase(pty, 0, pty->yn * pty->xn);
}
void PtySetY(struct Pty *pty, int y) {
pty->conf &= ~kPtyRedzone;
pty->y = MAX(0, MIN(pty->yn - 1, y));
}
void PtySetX(struct Pty *pty, int x) {
pty->conf &= ~kPtyRedzone;
pty->x = MAX(0, MIN(pty->xn - 1, x));
}
void PtyResize(struct Pty *pty, int yn, int xn) {
unsigned y, ym, xm, y0;
u32 *wcs, *fgs, *bgs, *prs;
if (xn < 80) xn = 80;
if (yn < 25) yn = 25;
if (xn == pty->xn && yn == pty->yn) return;
wcs = (u32 *)calloc(yn * xn, 4);
fgs = (u32 *)calloc(yn * xn, 4);
bgs = (u32 *)calloc(yn * xn, 4);
prs = (u32 *)calloc(yn * xn, 4);
y0 = yn > pty->y + 1 ? 0 : pty->y + 1 - yn;
ym = MIN(yn, pty->yn) + y0;
xm = MIN(xn, pty->xn);
for (y = y0; y < ym; ++y) {
memcpy(wcs + y * xn, pty->wcs + y * pty->xn, xm * 4);
memcpy(fgs + y * xn, pty->fgs + y * pty->xn, xm * 4);
memcpy(bgs + y * xn, pty->bgs + y * pty->xn, xm * 4);
memcpy(prs + y * xn, pty->prs + y * pty->xn, xm * 4);
}
FreePtyPlanes(pty);
pty->wcs = wcs;
pty->fgs = fgs;
pty->bgs = bgs;
pty->prs = prs;
pty->yn = yn;
pty->xn = xn;
PtySetY(pty, pty->y);
PtySetX(pty, pty->x);
}
static void PtyConcatInput(struct Pty *pty, const char *data, size_t n) {
AppendData(&pty->input, data, n);
}
static void PtyScroll(struct Pty *pty) {
PtyMemmove(pty, 0, pty->xn, pty->xn * (pty->yn - 1));
PtyErase(pty, pty->xn * (pty->yn - 1), pty->xn);
}
static void PtyReverse(struct Pty *pty) {
PtyMemmove(pty, pty->xn, 0, pty->xn * (pty->yn - 1));
PtyErase(pty, 0, pty->xn);
}
static void PtyIndex(struct Pty *pty) {
if (pty->y < pty->yn - 1) {
++pty->y;
} else {
PtyScroll(pty);
}
}
static void PtyReverseIndex(struct Pty *pty) {
if (pty->y) {
--pty->y;
} else {
PtyReverse(pty);
}
}
static void PtyCarriageReturn(struct Pty *pty) {
PtySetX(pty, 0);
}
static void PtyNewline(struct Pty *pty) {
PtyIndex(pty);
if (!(pty->conf & kPtyNoopost)) {
PtyCarriageReturn(pty);
}
}
static void PtyAdvance(struct Pty *pty) {
unassert(pty->xn - 1 == pty->x);
unassert(pty->conf & kPtyRedzone);
pty->conf &= ~kPtyRedzone;
pty->x = 0;
if (pty->y < pty->yn - 1) {
++pty->y;
} else {
PtyScroll(pty);
}
}
static void PtyWriteGlyph(struct Pty *pty, wint_t wc, int w) {
u32 i;
unassert(!(0x00 <= wc && wc <= 0x1F));
unassert(!(0x7F <= wc && wc <= 0x9F));
if (w < 1) wc = ' ', w = 1;
if ((pty->conf & kPtyRedzone) || pty->x + w > pty->xn) {
PtyAdvance(pty);
}
i = pty->y * pty->xn + pty->x;
pty->wcs[i] = wc;
if ((pty->prs[i] = pty->pr) & (kPtyFg | kPtyBg)) {
pty->fgs[i] = pty->fg;
pty->bgs[i] = pty->bg;
}
if ((pty->x += w) >= pty->xn) {
pty->x = pty->xn - 1;
pty->conf |= kPtyRedzone;
}
}
static void PtyWriteTab(struct Pty *pty) {
unsigned x, x2;
if (pty->conf & kPtyRedzone) {
PtyAdvance(pty);
}
x2 = MIN(pty->xn, ROUNDUP(pty->x + 1, 8));
for (x = pty->x; x < x2; ++x) {
pty->wcs[pty->y * pty->xn + x] = ' ';
}
if (x2 < pty->xn) {
pty->x = x2;
} else {
pty->x = pty->xn - 1;
pty->conf |= kPtyRedzone;
}
}
int PtyAtoi(const char *s, const char **e) {
int i;
for (i = 0; isdigit(*s); ++s) i *= 10, i += *s - '0';
if (e) *e = s;
return i;
}
static int PtyGetMoveParam(struct Pty *pty) {
int x = PtyAtoi(pty->esc.s, NULL);
if (x < 1) x = 1;
return x;
}
static void PtySetCursorPosition(struct Pty *pty) {
int row, col;
const char *s = pty->esc.s;
row = PtyAtoi(s, &s);
row = MAX(1, row);
if (*s == ';') ++s;
col = PtyAtoi(s, &s);
col = MAX(1, col);
PtySetY(pty, row - 1);
PtySetX(pty, col - 1);
}
static void PtySetCursorRow(struct Pty *pty) {
PtySetY(pty, PtyGetMoveParam(pty) - 1);
}
static void PtySetCursorColumn(struct Pty *pty) {
PtySetX(pty, PtyGetMoveParam(pty) - 1);
}
static void PtyMoveCursor(struct Pty *pty, int dy, int dx) {
int n = PtyGetMoveParam(pty);
PtySetY(pty, pty->y + dy * n);
PtySetX(pty, pty->x + dx * n);
}
static void PtyScrollUp(struct Pty *pty) {
int n = PtyGetMoveParam(pty);
while (n--) PtyScroll(pty);
}
static void PtyScrollDown(struct Pty *pty) {
int n = PtyGetMoveParam(pty);
while (n--) PtyReverse(pty);
}
static void PtySetCursorStatus(struct Pty *pty, bool status) {
if (status) {
pty->conf &= ~kPtyNocursor;
} else {
pty->conf |= kPtyNocursor;
}
}
static void PtySetMode(struct Pty *pty, bool status) {
const char *p = pty->esc.s;
switch (*p++) {
case '?':
while (isdigit(*p)) {
switch (PtyAtoi(p, &p)) {
case 25:
PtySetCursorStatus(pty, status);
break;
default:
break;
}
if (*p == ';') {
++p;
}
}
break;
default:
break;
}
}
static void PtySaveCursorPosition(struct Pty *pty) {
pty->save = (pty->y & 0x7FFF) | (pty->x & 0x7FFF) << 16;
}
static void PtyRestoreCursorPosition(struct Pty *pty) {
PtySetY(pty, (pty->save & 0x00007FFF) >> 000);
PtySetX(pty, (pty->save & 0x7FFF0000) >> 020);
}
static void PtyEraseDisplay(struct Pty *pty) {
switch (PtyAtoi(pty->esc.s, NULL)) {
case 0:
PtyErase(pty, pty->y * pty->xn + pty->x,
pty->yn * pty->xn - (pty->y * pty->xn + pty->x));
break;
case 1:
PtyErase(pty, 0, pty->y * pty->xn + pty->x);
break;
case 2:
case 3:
PtyErase(pty, 0, pty->yn * pty->xn);
break;
default:
break;
}
}
static void PtyEraseLine(struct Pty *pty) {
switch (PtyAtoi(pty->esc.s, NULL)) {
case 0:
PtyErase(pty, pty->y * pty->xn + pty->x, pty->xn - pty->x);
break;
case 1:
PtyErase(pty, pty->y * pty->xn, pty->x);
break;
case 2:
PtyErase(pty, pty->y * pty->xn, pty->xn);
break;
default:
break;
}
}
static void PtyEraseCells(struct Pty *pty) {
int i, n, x;
i = pty->y * pty->xn + pty->x;
n = pty->yn * pty->xn;
x = PtyAtoi(pty->esc.s, NULL);
x = MIN(MAX(x, 1), n - i);
PtyErase(pty, i, x);
}
static int PtyArg1(struct Pty *pty) {
int x = PtyAtoi(pty->esc.s, NULL);
return MAX(1, x);
}
static void PtyInsertCells(struct Pty *pty) {
int n = PtyArg1(pty);
n = MIN(pty->xn - pty->x, n);
PtyMemmove(pty, pty->y * pty->xn + pty->x + n, pty->y * pty->xn + pty->x,
pty->xn - (pty->x + n));
PtyErase(pty, pty->y * pty->xn + pty->x, n);
}
static void PtyInsertLines(struct Pty *pty) {
int n = PtyArg1(pty);
n = MIN(pty->yn - pty->y, n);
PtyMemmove(pty, (pty->y + n) * pty->xn, pty->y * pty->xn,
(pty->yn - pty->y - n) * pty->xn);
PtyErase(pty, pty->y * pty->xn, n * pty->xn);
}
static void PtyDeleteCells(struct Pty *pty) {
int n = PtyArg1(pty);
n = MIN(pty->xn - pty->x, n);
PtyMemmove(pty, pty->y * pty->xn + pty->x, pty->y * pty->xn + pty->x + n,
pty->xn - (pty->x + n));
PtyErase(pty, pty->y * pty->xn + pty->x, n);
}
static void PtyDeleteLines(struct Pty *pty) {
int n = PtyArg1(pty);
n = MIN(pty->yn - pty->y, n);
PtyMemmove(pty, pty->y * pty->xn, (pty->y + n) * pty->xn,
(pty->yn - pty->y - n) * pty->xn);
PtyErase(pty, (pty->y + n) * pty->xn, n * pty->xn);
}
static void PtyReportDeviceStatus(struct Pty *pty) {
PtyWriteInput(pty, "\033[0n", 4);
}
static void PtyReportPreferredVtType(struct Pty *pty) {
PtyWriteInput(pty, "\033[?1;0c", 4);
}
static void PtyReportPreferredVtIdentity(struct Pty *pty) {
PtyWriteInput(pty, "\033/Z", 4);
}
static void PtyBell(struct Pty *pty) {
pty->conf |= kPtyBell;
}
static void PtyLed(struct Pty *pty) {
switch (PtyAtoi(pty->esc.s, NULL)) {
case 0:
pty->conf &= ~kPtyLed1;
pty->conf &= ~kPtyLed2;
pty->conf &= ~kPtyLed3;
pty->conf &= ~kPtyLed4;
break;
case 1:
pty->conf |= kPtyLed1;
break;
case 2:
pty->conf |= kPtyLed2;
break;
case 3:
pty->conf |= kPtyLed3;
break;
case 4:
pty->conf |= kPtyLed4;
break;
default:
break;
}
}
static void PtyReportCursorPosition(struct Pty *pty) {
char buf[2 + 10 + 1 + 10 + 1];
PtyWriteInput(pty, buf,
sprintf(buf, "\033[%d;%dR", (pty->y + 1) & 0x7fff,
(pty->x + 1) & 0x7fff));
}
static void PtyCsiN(struct Pty *pty) {
switch (PtyAtoi(pty->esc.s, NULL)) {
case 5:
PtyReportDeviceStatus(pty);
break;
case 6:
PtyReportCursorPosition(pty);
break;
default:
break;
}
}
static void PtySelectGraphicsRendition(struct Pty *pty) {
char *p, c;
unsigned x;
u8 code[4];
enum Sgr {
kSgr,
kSgrFg = 010,
kSgrFgTrue = 012,
kSgrFgXterm = 015,
kSgrBg = 020,
kSgrBgTrue = 022,
kSgrBgXterm = 025,
} t;
x = 0;
t = kSgr;
p = pty->esc.s;
memset(code, 0, sizeof(code));
for (;;) {
c = *p++;
switch (c) {
case '\0':
return;
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
x *= 10;
x += c - '0';
break;
case ';':
case 'm':
code[code[3]] = x;
x = 0;
switch (t) {
case kSgr:
switch (code[0]) {
case 38:
t = kSgrFg;
break;
case 48:
t = kSgrBg;
break;
case 0:
pty->pr = 0;
pty->xlat = GetXlatSgr(pty);
break;
case 1:
pty->pr |= kPtyBold;
pty->xlat = GetXlatSgr(pty);
break;
case 2:
pty->pr |= kPtyFaint;
break;
case 3:
pty->pr |= kPtyItalic;
pty->xlat = GetXlatSgr(pty);
break;
case 4:
pty->pr |= kPtyUnder;
break;
case 5:
pty->pr |= kPtyBlink;
break;
case 7:
pty->pr |= kPtyFlip;
break;
case 8:
pty->pr |= kPtyConceal;
break;
case 9:
pty->pr |= kPtyStrike;
break;
case 20:
pty->pr |= kPtyFraktur;
pty->xlat = GetXlatSgr(pty);
break;
case 21:
pty->pr |= kPtyUnder | kPtyDunder;
break;
case 22:
pty->pr &= ~(kPtyFaint | kPtyBold);
pty->xlat = GetXlatSgr(pty);
break;
case 23:
pty->pr &= ~kPtyItalic;
pty->xlat = GetXlatSgr(pty);
break;
case 24:
pty->pr &= ~(kPtyUnder | kPtyDunder);
break;
case 25:
pty->pr &= ~kPtyBlink;
break;
case 27:
pty->pr &= ~kPtyFlip;
break;
case 28:
pty->pr &= ~kPtyConceal;
break;
case 29:
pty->pr &= ~kPtyStrike;
break;
case 39:
pty->pr &= ~kPtyFg;
break;
case 49:
pty->pr &= ~kPtyBg;
break;
case 90:
case 91:
case 92:
case 93:
case 94:
case 95:
case 96:
case 97:
code[0] -= 90 - 30;
code[0] += 8;
/* fallthrough */
case 30:
case 31:
case 32:
case 33:
case 34:
case 35:
case 36:
case 37:
pty->fg = code[0] - 30;
pty->pr |= kPtyFg;
pty->pr &= ~kPtyTrue;
break;
case 100:
case 101:
case 102:
case 103:
case 104:
case 105:
case 106:
case 107:
code[0] -= 100 - 40;
code[0] += 8;
/* fallthrough */
case 40:
case 41:
case 42:
case 43:
case 44:
case 45:
case 46:
case 47:
pty->bg = code[0] - 40;
pty->pr |= kPtyBg;
pty->pr &= ~kPtyTrue;
break;
default:
break;
}
break;
case kSgrFg:
case kSgrBg:
switch (code[0]) {
case 2:
case 5:
t = (enum Sgr)((int)t + code[0]);
break;
default:
t = kSgr;
break;
}
break;
case kSgrFgTrue:
if (++code[3] == 3) {
code[3] = 0;
t = kSgr;
pty->fg = Read32(code);
pty->pr |= kPtyFg;
pty->pr |= kPtyTrue;
}
break;
case kSgrBgTrue:
if (++code[3] == 3) {
code[3] = 0;
t = kSgr;
pty->bg = Read32(code);
pty->pr |= kPtyBg;
pty->pr |= kPtyTrue;
}
break;
case kSgrFgXterm:
t = kSgr;
pty->fg = code[0];
pty->pr |= kPtyFg;
pty->pr &= ~kPtyTrue;
break;
case kSgrBgXterm:
t = kSgr;
pty->bg = code[0];
pty->pr |= kPtyBg;
pty->pr &= ~kPtyTrue;
break;
default:
Abort();
}
break;
default:
break;
}
}
}
static void PtyCsi(struct Pty *pty) {
switch (pty->esc.s[pty->esc.i - 1]) {
case 'f':
case 'H':
PtySetCursorPosition(pty);
break;
case 'G':
PtySetCursorColumn(pty);
break;
case 'd':
PtySetCursorRow(pty);
break;
case 'F':
pty->x = 0;
/* fallthrough */
case 'A':
PtyMoveCursor(pty, -1, +0);
break;
case 'E':
pty->x = 0;
/* fallthrough */
case 'B':
PtyMoveCursor(pty, +1, +0);
break;
case 'C':
PtyMoveCursor(pty, +0, +1);
break;
case 'D':
PtyMoveCursor(pty, +0, -1);
break;
case 'S':
PtyScrollUp(pty);
break;
case 'T':
PtyScrollDown(pty);
break;
case '@':