diff options
| -rw-r--r-- | bin/shotty.c | 648 | ||||
| -rw-r--r-- | bin/shotty.l | 554 |
2 files changed, 554 insertions, 648 deletions
diff --git a/bin/shotty.c b/bin/shotty.c deleted file mode 100644 index de7fc8ac..00000000 --- a/bin/shotty.c +++ /dev/null @@ -1,648 +0,0 @@ -/* Copyright (C) 2019 June McEnroe <june@causal.agency> - * - * This program is free software: you can redistribute it and/or modify - * it under the terms of the GNU Affero General Public License as published by - * the Free Software Foundation, either version 3 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU Affero General Public License for more details. - * - * You should have received a copy of the GNU Affero General Public License - * along with this program. If not, see <http://www.gnu.org/licenses/>. - */ - -#include <assert.h> -#include <err.h> -#include <locale.h> -#include <stdbool.h> -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include <sys/ioctl.h> -#include <sysexits.h> -#include <unistd.h> -#include <wchar.h> - -#define BIT(x) x##Bit, x = 1 << x##Bit, x##Bit_ = x##Bit - -typedef unsigned uint; - -enum { - NUL, SOH, STX, ETX, EOT, ENQ, ACK, BEL, - BS, HT, NL, VT, NP, CR, SO, SI, - DLE, DC1, DC2, DC3, DC4, NAK, SYN, ETB, - CAN, EM, SUB, ESC, FS, GS, RS, US, - DEL = 0x7F, -}; - -enum Attr { - BIT(Bold), - BIT(Dim), - BIT(Italic), - BIT(Underline), - BIT(Blink), - BIT(Reverse), -}; - -struct Style { - enum Attr attr; - int bg, fg; -}; - -struct Cell { - struct Style style; - wchar_t ch; -}; - -static uint rows = 24, cols = 80; -static struct Cell *cells; - -static struct Cell *cell(uint y, uint x) { - assert(y <= rows); - assert(x <= cols); - assert(y * cols + x <= rows * cols); - return &cells[y * cols + x]; -} - -static uint y, x; -static struct Style style = { .bg = -1, .fg = -1 }; - -static struct { - uint y, x; -} save; - -enum { ParamCap = 16 }; -static struct { - uint s[ParamCap]; - uint n, i; -} param; - -static uint p(uint i, uint z) { - return (i < param.n ? param.s[i] : z); -} - -static uint min(uint a, uint b) { - return (a < b ? a : b); -} - -#define _ch ch __attribute__((unused)) -typedef void Action(wchar_t ch); - -static void nop(wchar_t _ch) { -} - -static void csi(wchar_t _ch) { - memset(¶m, 0, sizeof(param)); -} - -static void csiSep(wchar_t _ch) { - if (param.n == ParamCap) return; - if (!param.n) param.n++; - param.n++; - param.i++; -} - -static void csiDigit(wchar_t ch) { - param.s[param.i] *= 10; - param.s[param.i] += ch - L'0'; - if (!param.n) param.n++; -} - -static void bs(wchar_t _ch) { if (x) x--; } -static void ht(wchar_t _ch) { x = min(x - x % 8 + 8, cols - 1); } -static void cr(wchar_t _ch) { x = 0; } -static void cuu(wchar_t _ch) { y -= min(p(0, 1), y); } -static void cud(wchar_t _ch) { y = min(y + p(0, 1), rows - 1); } -static void cuf(wchar_t _ch) { x = min(x + p(0, 1), cols - 1); } -static void cub(wchar_t _ch) { x -= min(p(0, 1), x); } -static void cnl(wchar_t _ch) { x = 0; cud(0); } -static void cpl(wchar_t _ch) { x = 0; cuu(0); } -static void cha(wchar_t _ch) { x = min(p(0, 1) - 1, cols - 1); } -static void vpa(wchar_t _ch) { y = min(p(0, 1) - 1, rows - 1); } -static void cup(wchar_t _ch) { - y = min(p(0, 1) - 1, rows - 1); - x = min(p(1, 1) - 1, cols - 1); -} -static void decsc(wchar_t _ch) { - save.y = y; - save.x = x; -} -static void decrc(wchar_t _ch) { - y = save.y; - x = save.x; -} - -static void move(struct Cell *dst, struct Cell *src, size_t len) { - memmove(dst, src, sizeof(*dst) * len); -} - -static void erase(struct Cell *at, struct Cell *to) { - for (; at < to; ++at) { - at->style = style; - at->ch = L' '; - } -} - -static void ed(wchar_t _ch) { - erase( - (p(0, 0) == 0 ? cell(y, x) : cell(0, 0)), - (p(0, 0) == 1 ? cell(y, x) : cell(rows - 1, cols)) - ); -} -static void el(wchar_t _ch) { - erase( - (p(0, 0) == 0 ? cell(y, x) : cell(y, 0)), - (p(0, 0) == 1 ? cell(y, x) : cell(y, cols)) - ); -} -static void ech(wchar_t _ch) { - erase(cell(y, x), cell(y, min(x + p(0, 1), cols))); -} - -static void dch(wchar_t _ch) { - uint n = min(p(0, 1), cols - x); - move(cell(y, x), cell(y, x + n), cols - x - n); - erase(cell(y, cols - n), cell(y, cols)); -} -static void ich(wchar_t _ch) { - uint n = min(p(0, 1), cols - x); - move(cell(y, x + n), cell(y, x), cols - x - n); - erase(cell(y, x), cell(y, x + n)); -} - -static struct { - uint top, bot; -} scroll; - -static void scrollUp(uint top, uint n) { - n = min(n, scroll.bot - top); - move(cell(top, 0), cell(top + n, 0), cols * (scroll.bot - top - n)); - erase(cell(scroll.bot - n, 0), cell(scroll.bot, 0)); -} - -static void scrollDown(uint top, uint n) { - n = min(n, scroll.bot - top); - move(cell(top + n, 0), cell(top, 0), cols * (scroll.bot - top - n)); - erase(cell(top, 0), cell(top + n, 0)); -} - -static void decstbm(wchar_t _ch) { - scroll.bot = min(p(1, rows), rows); - scroll.top = min(p(0, 1) - 1, scroll.bot); -} - -static void su(wchar_t _ch) { scrollUp(scroll.top, p(0, 1)); } -static void sd(wchar_t _ch) { scrollDown(scroll.top, p(0, 1)); } -static void dl(wchar_t _ch) { scrollUp(min(y, scroll.bot), p(0, 1)); } -static void il(wchar_t _ch) { scrollDown(min(y, scroll.bot), p(0, 1)); } - -static void nl(wchar_t _ch) { - if (y + 1 == scroll.bot) { - scrollUp(scroll.top, 1); - } else { - y = min(y + 1, rows - 1); - } -} -static void ri(wchar_t _ch) { - if (y == scroll.top) { - scrollDown(scroll.top, 1); - } else { - if (y) y--; - } -} - -static enum Mode { - BIT(Insert), - BIT(Wrap), - BIT(Cursor), -} mode = Wrap | Cursor; - -static enum Mode paramMode(void) { - enum Mode mode = 0; - for (uint i = 0; i < param.n; ++i) { - switch (param.s[i]) { - break; case 4: mode |= Insert; - break; default: warnx("unhandled SM/RM %u", param.s[i]); - } - } - return mode; -} - -static enum Mode paramDECMode(void) { - enum Mode mode = 0; - for (uint i = 0; i < param.n; ++i) { - switch (param.s[i]) { - break; case 1: // DECCKM - break; case 7: mode |= Wrap; - break; case 12: // "Start Blinking Cursor" - break; case 25: mode |= Cursor; - break; default: { - if (param.s[i] < 1000) { - warnx("unhandled DECSET/DECRST %u", param.s[i]); - } - } - } - } - return mode; -} - -static void sm(wchar_t _ch) { mode |= paramMode(); } -static void rm(wchar_t _ch) { mode &= ~paramMode(); } -static void decset(wchar_t _ch) { mode |= paramDECMode(); } -static void decrst(wchar_t _ch) { mode &= ~paramDECMode(); } - -enum { - Reset, - SetBold, - SetDim, - SetItalic, - SetUnderline, - SetBlink, - SetReverse = 7, - - UnsetBoldDim = 22, - UnsetItalic, - UnsetUnderline, - UnsetBlink, - UnsetReverse = 27, - - SetFg0 = 30, - SetFg7 = 37, - SetFg, - ResetFg, - SetBg0 = 40, - SetBg7 = 47, - SetBg, - ResetBg, - - SetFg8 = 90, - SetFgF = 97, - SetBg8 = 100, - SetBgF = 107, - - Color256 = 5, -}; - -static void sgr(wchar_t _ch) { - uint n = param.i + 1; - for (uint i = 0; i < n; ++i) { - switch (param.s[i]) { - break; case Reset: style = (struct Style) { .bg = -1, .fg = -1 }; - - break; case SetBold: style.attr |= Bold; style.attr &= ~Dim; - break; case SetDim: style.attr |= Dim; style.attr &= ~Bold; - break; case SetItalic: style.attr |= Italic; - break; case SetUnderline: style.attr |= Underline; - break; case SetBlink: style.attr |= Blink; - break; case SetReverse: style.attr |= Reverse; - - break; case UnsetBoldDim: style.attr &= ~(Bold | Dim); - break; case UnsetItalic: style.attr &= ~Italic; - break; case UnsetUnderline: style.attr &= ~Underline; - break; case UnsetBlink: style.attr &= ~Blink; - break; case UnsetReverse: style.attr &= ~Reverse; - - break; case SetFg: { - if (++i < n && param.s[i] == Color256) { - if (++i < n) style.fg = param.s[i]; - } - } - break; case SetBg: { - if (++i < n && param.s[i] == Color256) { - if (++i < n) style.bg = param.s[i]; - } - } - - break; case ResetFg: style.fg = -1; - break; case ResetBg: style.bg = -1; - - break; default: { - uint p = param.s[i]; - if (p >= SetFg0 && p <= SetFg7) { - style.fg = p - SetFg0; - } else if (p >= SetBg0 && p <= SetBg7) { - style.bg = p - SetBg0; - } else if (p >= SetFg8 && p <= SetFgF) { - style.fg = 8 + p - SetFg8; - } else if (p >= SetBg8 && p <= SetBgF) { - style.bg = 8 + p - SetBg8; - } else { - warnx("unhandled SGR %u", p); - } - } - } - } -} - -static enum { - USASCII, - DECSpecial, -} charset; - -static void usascii(wchar_t _ch) { charset = USASCII; } -static void decSpecial(wchar_t _ch) { charset = DECSpecial; } - -static const wchar_t AltCharset[128] = { - ['`'] = L'◆', ['a'] = L'▒', ['f'] = L'°', ['g'] = L'±', ['i'] = L'␋', - ['j'] = L'┘', ['k'] = L'┐', ['l'] = L'┌', ['m'] = L'└', ['n'] = L'┼', - ['o'] = L'⎺', ['p'] = L'⎻', ['q'] = L'─', ['r'] = L'⎼', ['s'] = L'⎽', - ['t'] = L'├', ['u'] = L'┤', ['v'] = L'┴', ['w'] = L'┬', ['x'] = L'│', - ['y'] = L'≤', ['z'] = L'≥', ['{'] = L'π', ['|'] = L'≠', ['}'] = L'£', - ['~'] = L'·', -}; - -static void add(wchar_t ch) { - if (charset == DECSpecial && ch < 128 && AltCharset[ch]) { - ch = AltCharset[ch]; - } - - int width = wcwidth(ch); - if (width < 0) { - warnx("unhandled \\u%02X", ch); - return; - } - - if (mode & Insert) { - uint n = min(width, cols - x); - move(cell(y, x + n), cell(y, x), cols - x - n); - } - if (mode & Wrap && x + width > cols) { - cr(0); - nl(0); - } - - cell(y, x)->style = style; - cell(y, x)->ch = ch; - for (int i = 1; i < width && x + i < cols; ++i) { - cell(y, x + i)->style = style; - cell(y, x + i)->ch = L'\0'; - } - x = min(x + width, (mode & Wrap ? cols : cols - 1)); -} - -static void html(void); -static void mc(wchar_t _ch) { - if (p(0, 0) == 10) { - html(); - } else { - warnx("unhandled CSI %u MC", p(0, 0)); - } -} - -static enum { - Data, - Esc, - G0, - CSI, - CSILt, - CSIEq, - CSIGt, - CSIQm, - CSIInter, - OSC, - OSCEsc, -} state; - -static void escDefault(wchar_t ch) { - warnx("unhandled ESC %lc", ch); -} - -static void g0Default(wchar_t ch) { - warnx("unhandled G0 %lc", ch); - charset = USASCII; -} - -static void csiInter(wchar_t ch) { - switch (state) { - break; case CSI: warnx("unhandled CSI %lc ...", ch); - break; case CSILt: warnx("unhandled CSI < %lc ...", ch); - break; case CSIEq: warnx("unhandled CSI = %lc ...", ch); - break; case CSIGt: warnx("unhandled CSI > %lc ...", ch); - break; case CSIQm: warnx("unhandled CSI ? %lc ...", ch); - break; default: abort(); - } -} - -static void csiFinal(wchar_t ch) { - switch (state) { - break; case CSI: warnx("unhandled CSI %lc", ch); - break; case CSILt: warnx("unhandled CSI < %lc", ch); - break; case CSIEq: warnx("unhandled CSI = %lc", ch); - break; case CSIGt: warnx("unhandled CSI > %lc", ch); - break; case CSIQm: warnx("unhandled CSI ? %lc", ch); - break; case CSIInter: warnx("unhandled CSI ... %lc", ch); - break; default: abort(); - } -} - -#define S(s) break; case s: switch (ch) -#define A(c, a, s) break; case c: a(ch); state = s -#define D(a, s) break; default: a(ch); state = s -static void update(wchar_t ch) { - switch (state) { - default: abort(); - - S(Data) { - A(BEL, nop, Data); - A(BS, bs, Data); - A(HT, ht, Data); - A(NL, nl, Data); - A(CR, cr, Data); - A(ESC, nop, Esc); - D(add, Data); - } - - S(Esc) { - A('(', nop, G0); - A('7', decsc, Data); - A('8', decrc, Data); - A('=', nop, Data); - A('>', nop, Data); - A('M', ri, Data); - A('[', csi, CSI); - A(']', nop, OSC); - D(escDefault, Data); - } - S(G0) { - A('0', decSpecial, Data); - A('B', usascii, Data); - D(g0Default, Data); - } - - S(CSI) { - A(' ' ... '/', csiInter, CSIInter); - A('0' ... '9', csiDigit, CSI); - A(':', nop, CSI); - A(';', csiSep, CSI); - A('<', nop, CSILt); - A('=', nop, CSIEq); - A('>', nop, CSIGt); - A('?', nop, CSIQm); - A('@', ich, Data); - A('A', cuu, Data); - A('B', cud, Data); - A('C', cuf, Data); - A('D', cub, Data); - A('E', cnl, Data); - A('F', cpl, Data); - A('G', cha, Data); - A('H', cup, Data); - A('J', ed, Data); - A('K', el, Data); - A('L', il, Data); - A('M', dl, Data); - A('P', dch, Data); - A('S', su, Data); - A('T', sd, Data); - A('X', ech, Data); - A('d', vpa, Data); - A('h', sm, Data); - A('i', mc, Data); - A('l', rm, Data); - A('m', sgr, Data); - A('r', decstbm, Data); - A('t', nop, Data); - D(csiFinal, Data); - } - - S(CSILt ... CSIGt) { - A(' ' ... '/', csiInter, CSIInter); - A('0' ... '9', csiDigit, state); - A(':', nop, state); - A(';', csiSep, state); - D(csiFinal, Data); - } - - S(CSIQm) { - A(' ' ... '/', csiInter, CSIInter); - A('0' ... '9', csiDigit, CSIQm); - A(':', nop, CSIQm); - A(';', csiSep, CSIQm); - A('h', decset, Data); - A('l', decrst, Data); - D(csiFinal, Data); - } - - S(CSIInter) { - D(csiFinal, Data); - } - - S(OSC) { - A(BEL, nop, Data); - A(ESC, nop, OSCEsc); - D(nop, OSC); - } - S(OSCEsc) { - A('\\', nop, Data); - D(nop, OSC); - } - } -} - -static bool bright; -static int defaultBg = 0; -static int defaultFg = 7; - -static void span(const struct Style *prev, const struct Cell *cell) { - struct Style style = cell->style; - if (!prev || memcmp(prev, &style, sizeof(*prev))) { - if (prev) printf("</span>"); - if (style.bg < 0) style.bg = defaultBg; - if (style.fg < 0) style.fg = defaultFg; - if (bright && style.attr & Bold) { - if (style.fg < 8) style.fg += 8; - style.attr ^= Bold; - } - printf( - "<span style=\"%s%s%s\" class=\"bg%u fg%u\">", - (style.attr & Bold ? "font-weight:bold;" : ""), - (style.attr & Italic ? "font-style:italic;" : ""), - (style.attr & Underline ? "text-decoration:underline;" : ""), - (style.attr & Reverse ? style.fg : style.bg), - (style.attr & Reverse ? style.bg : style.fg) - ); - } - switch (cell->ch) { - break; case '&': printf("&"); - break; case '<': printf("<"); - break; case '>': printf(">"); - break; default: printf("%lc", (wint_t)cell->ch); - } -} - -static bool mediaCopy; -static void html(void) { - mediaCopy = true; - if (mode & Cursor) cell(y, x)->style.attr ^= Reverse; - printf( - "<pre style=\"width: %uch;\" class=\"bg%u fg%u\">", - cols, defaultBg, defaultFg - ); - for (uint y = 0; y < rows; ++y) { - for (uint x = 0; x < cols; ++x) { - if (!cell(y, x)->ch) continue; - span(x ? &cell(y, x - 1)->style : NULL, cell(y, x)); - } - printf("</span>\n"); - } - printf("</pre>\n"); - if (mode & Cursor) cell(y, x)->style.attr ^= Reverse; -} - -int main(int argc, char *argv[]) { - setlocale(LC_CTYPE, ""); - - bool debug = false; - bool size = false; - bool hide = false; - - int opt; - while (0 < (opt = getopt(argc, argv, "Bb:df:h:nsw:"))) { - switch (opt) { - break; case 'B': bright = true; - break; case 'b': defaultBg = strtol(optarg, NULL, 0); - break; case 'd': debug = true; - break; case 'f': defaultFg = strtol(optarg, NULL, 0); - break; case 'h': rows = strtoul(optarg, NULL, 0); - break; case 'n': hide = true; - break; case 's': size = true; - break; case 'w': cols = strtoul(optarg, NULL, 0); - break; default: return EX_USAGE; - } - } - - FILE *file = stdin; - if (optind < argc) { - file = fopen(argv[optind], "r"); - if (!file) err(EX_NOINPUT, "%s", argv[optind]); - } - - if (size) { - struct winsize window; - int error = ioctl(STDERR_FILENO, TIOCGWINSZ, &window); - if (error) err(EX_IOERR, "ioctl"); - rows = window.ws_row; - cols = window.ws_col; - } - scroll.bot = rows; - - cells = calloc(rows * cols, sizeof(*cells)); - if (!cells) err(EX_OSERR, "calloc"); - erase(cell(0, 0), cell(rows - 1, cols)); - - wint_t ch; - while (WEOF != (ch = getwc(file))) { - uint prev = state; - update(ch); - if (debug && state != prev && state == Data) html(); - } - if (ferror(file)) err(EX_IOERR, "getwc"); - - if (!mediaCopy) { - if (hide) mode &= ~Cursor; - html(); - } -} diff --git a/bin/shotty.l b/bin/shotty.l new file mode 100644 index 00000000..b8c04f52 --- /dev/null +++ b/bin/shotty.l @@ -0,0 +1,554 @@ +/* Copyright (C) 2019, 2021 June McEnroe <june@causal.agency> + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU Affero General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU Affero General Public License for more details. + * + * You should have received a copy of the GNU Affero General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ + +%option noyywrap + +%{ + +#include <assert.h> +#include <err.h> +#include <locale.h> +#include <stdbool.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <sys/ioctl.h> +#include <sysexits.h> +#include <unistd.h> +#include <wchar.h> + +#define Q(...) #__VA_ARGS__ +#define BIT(x) x##Bit, x = 1 << x##Bit, x##Bit_ = x##Bit + +#define ENUM_CODE \ + X(BS) \ + X(CHA) \ + X(CNL) \ + X(CPL) \ + X(CR) \ + X(CUB) \ + X(CUD) \ + X(CUF) \ + X(CUP) \ + X(CUU) \ + X(DCH) \ + X(DECKPAM) \ + X(DECKPNM) \ + X(DECRC) \ + X(DECRST) \ + X(DECSC) \ + X(DECSET) \ + X(DECSTBM) \ + X(DL) \ + X(ECH) \ + X(ED) \ + X(EL) \ + X(HT) \ + X(ICH) \ + X(IL) \ + X(MC) \ + X(NL) \ + X(RI) \ + X(RM) \ + X(SD) \ + X(SGR) \ + X(SM) \ + X(SU) \ + X(VPA) + +enum Code { + Data = 1, +#define X(code) code, + ENUM_CODE +#undef X +}; + +static enum { + USASCII, + DECSpecial, +} g0; + +static const wchar_t AltCharset[128] = { + ['`'] = L'\u25C6', ['a'] = L'\u2592', ['f'] = L'\u00B0', ['g'] = L'\u00B1', + ['i'] = L'\u240B', ['j'] = L'\u2518', ['k'] = L'\u2510', ['l'] = L'\u250C', + ['m'] = L'\u2514', ['n'] = L'\u253C', ['o'] = L'\u23BA', ['p'] = L'\u23BB', + ['q'] = L'\u2500', ['r'] = L'\u23BC', ['s'] = L'\u23BD', ['t'] = L'\u251C', + ['u'] = L'\u2524', ['v'] = L'\u2534', ['w'] = L'\u252C', ['x'] = L'\u2502', + ['y'] = L'\u2264', ['z'] = L'\u2265', ['{'] = L'\u03C0', ['|'] = L'\u2260', + ['}'] = L'\u00A3', ['~'] = L'\u00B7', +}; + +static int pn; +static int ps[16]; +static wchar_t ch; + +%} + +ESC \x1B + +%x CSI CSI_LT CSI_EQ CSI_GT CSI_QM +%x OSC + +%% + (void)input; + (void)yyunput; + pn = 0; + +{ESC}"[" BEGIN(CSI); +{ESC}"[<" BEGIN(CSI_LT); +{ESC}"[=" BEGIN(CSI_EQ); +{ESC}"[>" BEGIN(CSI_GT); +{ESC}"[?" BEGIN(CSI_QM); +{ESC}"]" BEGIN(OSC); + +<CSI,CSI_LT,CSI_EQ,CSI_GT,CSI_QM>{ + [0-9]+;? if (pn < 16) ps[pn++] = atoi(yytext); + ; if (pn < 16) ps[pn++] = 0; +} + +<OSC>{ + \x07 BEGIN(0); + {ESC}\\ BEGIN(0); + .|\n ; +} + +\b return BS; +\t return HT; +\n return NL; +\r return CR; + +{ESC}7 return DECSC; +{ESC}8 return DECRC; +{ESC}= return DECKPAM; +{ESC}> return DECKPNM; +{ESC}M return RI; + +{ESC}"(0" g0 = DECSpecial; +{ESC}"(B" g0 = USASCII; + +<CSI>@ BEGIN(0); return ICH; +<CSI>A BEGIN(0); return CUU; +<CSI>B BEGIN(0); return CUD; +<CSI>C BEGIN(0); return CUF; +<CSI>D BEGIN(0); return CUB; +<CSI>E BEGIN(0); return CNL; +<CSI>F BEGIN(0); return CPL; +<CSI>G BEGIN(0); return CHA; +<CSI>H BEGIN(0); return CUP; +<CSI>J BEGIN(0); return ED; +<CSI>K BEGIN(0); return EL; +<CSI>L BEGIN(0); return IL; +<CSI>M BEGIN(0); return DL; +<CSI>P BEGIN(0); return DCH; +<CSI>S BEGIN(0); return SU; +<CSI>T BEGIN(0); return SD; +<CSI>X BEGIN(0); return ECH; +<CSI>d BEGIN(0); return VPA; +<CSI>h BEGIN(0); return SM; +<CSI>i BEGIN(0); return MC; +<CSI>l BEGIN(0); return RM; +<CSI>m BEGIN(0); return SGR; +<CSI>r BEGIN(0); return DECSTBM; + +<CSI_QM>h BEGIN(0); return DECSET; +<CSI_QM>l BEGIN(0); return DECRST; + +<CSI>[ -/]*. BEGIN(0); warnx("unhandled CSI %s", yytext); +<CSI_LT>[ -/]*. BEGIN(0); warnx("unhandled CSI < %s", yytext); +<CSI_EQ>[ -/]*. BEGIN(0); warnx("unhandled CSI = %s", yytext); +<CSI_GT>[ -/]*. BEGIN(0); warnx("unhandled CSI > %s", yytext); +<CSI_QM>[ -/]*. BEGIN(0); warnx("unhandled CSI ? %s", yytext); + +[\x00-\x7F] { + ch = yytext[0]; + if (g0 == DECSpecial && AltCharset[ch]) { + ch = AltCharset[ch]; + } + return Data; +} +[\xC0-\xDF][\x80-\xBF] { + ch = (wchar_t)(yytext[0] & 0x1F) << 6 + | (wchar_t)(yytext[1] & 0x3F); + return Data; +} +[\xE0-\xEF][\x80-\xBF]{2} { + ch = (wchar_t)(yytext[0] & 0x0F) << 12 + | (wchar_t)(yytext[1] & 0x3F) << 6 + | (wchar_t)(yytext[2] & 0x3F); + return Data; +} +[\xF0-\xF7][\x80-\xBF]{3} { + ch = (wchar_t)(yytext[0] & 0x07) << 18 + | (wchar_t)(yytext[1] & 0x3F) << 12 + | (wchar_t)(yytext[2] & 0x3F) << 6 + | (wchar_t)(yytext[3] & 0x3F); + return Data; +} + +. ch = yytext[0]; return Data; + +%% + +static int rows = 24; +static int cols = 80; + +static struct Cell { + enum { + BIT(Bold), + BIT(Italic), + BIT(Underline), + BIT(Reverse), + } attr; + int bg, fg; + wchar_t ch; +} *cells; + +static int y, x; +static struct { + int y, x; +} sc; +static struct { + int top, bot; +} scr; + +static enum Mode { + BIT(Insert), + BIT(Wrap), + BIT(Cursor), +} mode = Wrap | Cursor; + +static struct Cell sgr = { + .bg = -1, + .fg = -1, + .ch = L' ', +}; + +static struct Cell *cell(int y, int x) { + assert(y <= rows); + assert(x <= cols); + assert(y * cols + x <= rows * cols); + return &cells[y * cols + x]; +} + +static int p(int i, int d) { + return (i < pn ? ps[i] : d); +} + +static int bound(int a, int x, int b) { + if (x < a) return a; + if (x > b) return b; + return x; +} + +static void move(struct Cell *dst, struct Cell *src, size_t len) { + memmove(dst, src, sizeof(*dst) * len); +} +static void erase(struct Cell *at, struct Cell *to) { + for (; at < to; ++at) { + *at = sgr; + } +} + +static void scrup(int top, int n) { + n = bound(0, n, scr.bot - top); + move(cell(top, 0), cell(top+n, 0), cols * (scr.bot-top-n)); + erase(cell(scr.bot-n, 0), cell(scr.bot, 0)); +} +static void scrdn(int top, int n) { + n = bound(0, n, scr.bot - top); + move(cell(top+n, 0), cell(top, 0), cols * (scr.bot-top-n)); + erase(cell(top, 0), cell(top+n, 0)); +} + +static enum Mode pmode(void) { + enum Mode mode = 0; + for (int i = 0; i < pn; ++i) { + switch (ps[i]) { + break; case 4: mode |= Insert; + break; default: warnx("unhandled SM/RM %d", ps[i]); + } + } + return mode; +} +static enum Mode pdmode(void) { + enum Mode mode = 0; + for (int i = 0; i < pn; ++i) { + switch (ps[i]) { + break; case 1: // DECCKM + break; case 7: mode |= Wrap; + break; case 12: // "Start Blinking Cursor" + break; case 25: mode |= Cursor; + break; default: { + if (ps[i] < 1000) warnx("unhandled DECSET/DECRST %d", ps[i]); + } + } + } + return mode; +} + +static void update(enum Code cc) { + switch (cc) { + break; case BS: x--; + break; case HT: x = x - x % 8 + 8; + break; case CR: x = 0; + break; case CUU: y -= p(0, 1); + break; case CUD: y += p(0, 1); + break; case CUF: x += p(0, 1); + break; case CUB: x -= p(0, 1); + break; case CNL: x = 0; y += p(0, 1); + break; case CPL: x = 0; y -= p(0, 1); + break; case CHA: x = p(0, 1) - 1; + break; case VPA: y = p(0, 1) - 1; + break; case CUP: y = p(0, 1) - 1; x = p(1, 1) - 1; + break; case DECSC: sc.y = y; sc.x = x; + break; case DECRC: y = sc.y; x = sc.x; + + break; case ED: erase( + (p(0, 0) == 0 ? cell(y, x) : cell(0, 0)), + (p(0, 0) == 1 ? cell(y, x) : cell(rows-1, cols)) + ); + break; case EL: erase( + (p(0, 0) == 0 ? cell(y, x) : cell(y, 0)), + (p(0, 0) == 1 ? cell(y, x) : cell(y, cols)) + ); + break; case ECH: erase( + cell(y, x), cell(y, bound(0, x + p(0, 1), cols)) + ); + + break; case DCH: { + int n = bound(0, p(0, 1), cols-x); + move(cell(y, x), cell(y, x+n), cols-x-n); + erase(cell(y, cols-n), cell(y, cols)); + } + break; case ICH: { + int n = bound(0, p(0, 1), cols-x); + move(cell(y, x+n), cell(y, x), cols-x-n); + erase(cell(y, x), cell(y, x+n)); + } + + break; case DECSTBM: { + scr.bot = bound(0, p(1, rows), rows); + scr.top = bound(0, p(0, 1) - 1, scr.bot); + } + break; case SU: scrup(scr.top, p(0, 1)); + break; case SD: scrdn(scr.top, p(0, 1)); + break; case DL: scrup(bound(0, y, scr.bot), p(0, 1)); + break; case IL: scrdn(bound(0, y, scr.bot), p(0, 1)); + + break; case NL: { + if (y+1 == scr.bot) { + scrup(scr.top, 1); + } else { + y++; + } + } + break; case RI: { + if (y == scr.top) { + scrdn(scr.top, 1); + } else { + y--; + } + } + + break; case SM: mode |= pmode(); + break; case RM: mode &= ~pmode(); + break; case DECSET: mode |= pdmode(); + break; case DECRST: mode &= ~pdmode(); + + break; case SGR: { + if (!pn) ps[pn++] = 0; + for (int i = 0; i < pn; ++i) { + switch (ps[i]) { + break; case 0: sgr.attr = 0; sgr.bg = -1; sgr.fg = -1; + break; case 1: sgr.attr |= Bold; + break; case 3: sgr.attr |= Italic; + break; case 4: sgr.attr |= Underline; + break; case 7: sgr.attr |= Reverse; + break; case 22: sgr.attr &= ~Bold; + break; case 23: sgr.attr &= ~Italic; + break; case 24: sgr.attr &= ~Underline; + break; case 27: sgr.attr &= ~Reverse; + break; case 30 ... 37: sgr.fg = ps[i] - 30; + break; case 38: { + if (++i < pn && ps[i] == 5) { + if (++i < pn) sgr.fg = ps[i]; + } + } + break; case 39: sgr.fg = -1; + break; case 40 ... 47: sgr.bg = ps[i] - 40; + break; case 48: { + if (++i < pn && ps[i] == 5) { + if (++i < pn) sgr.bg = ps[i]; + } + } + break; case 49: sgr.bg = -1; + break; case 90 ... 97: sgr.fg = 8 + ps[i] - 90; + break; case 100 ... 107: sgr.bg = 8 + ps[i] - 100; + break; default: warnx("unhandled SGR %d", ps[i]); + } + } + } + + break; case Data: { + int w = wcwidth(ch); + if (w < 0) { + warnx("unhandled \\u%04X", ch); + return; + } + if (mode & Insert) { + int n = bound(0, w, cols-x); + move(cell(y, x+n), cell(y, x), cols-x-n); + } + if (mode & Wrap && x+w > cols) { + update(CR); + update(NL); + } + *cell(y, x) = sgr; + cell(y, x)->ch = ch; + for (int i = 1; i < w && x+i < cols; ++i) { + *cell(y, x+i) = sgr; + cell(y, x+i)->ch = L'\0'; + } + x = bound(0, x+w, (mode & Wrap ? cols : cols-1)); + return; + } + + break; case MC:; + break; case DECKPAM:; + break; case DECKPNM:; + } + + x = bound(0, x, cols-1); + y = bound(0, y, rows-1); +} + +static bool bright; +static int defaultBg = 0; +static int defaultFg = 7; + +static void span(const struct Cell *prev, const struct Cell *cell) { + if ( + !prev || + cell->attr != prev->attr || + cell->bg != prev->bg || + cell->fg != prev->fg + ) { + if (prev) printf("</span>"); + int attr = cell->attr; + int bg = (cell->bg < 0 ? defaultBg : cell->bg); + int fg = (cell->fg < 0 ? defaultFg : cell->fg); + if (bright && cell->attr & Bold) { + if (fg < 8) fg += 8; + attr &= ~Bold; + } + printf( + Q(<span style="%s%s%s" class="bg%d fg%d">), + (attr & Bold ? "font-weight:bold;" : ""), + (attr & Italic ? "font-style:italic;" : ""), + (attr & Underline ? "text-decoration:underline;" : ""), + (attr & Reverse ? fg : bg), (attr & Reverse ? bg : fg) + ); + } + switch (cell->ch) { + break; case L'&': printf("&"); + break; case L'<': printf("<"); + break; case L'>': printf(">"); + break; case L'"': printf("""); + break; default: printf("%lc", (wint_t)cell->ch); + } +} + +static void html(void) { + if (mode & Cursor) cell(y, x)->attr ^= Reverse; + printf( + Q(<pre style="width: %dch;" class="bg%d fg%d">), + cols, defaultBg, defaultFg + ); + for (int y = 0; y < rows; ++y) { + for (int x = 0; x < cols; ++x) { + if (!cell(y, x)->ch) continue; + span((x ? cell(y, x-1) : NULL), cell(y, x)); + } + printf("</span>\n"); + } + printf("</pre>\n"); + if (mode & Cursor) cell(y, x)->attr ^= Reverse; +} + +static const char *Debug[] = { +#define X(code) [code] = #code, + ENUM_CODE +#undef X +}; + +int main(int argc, char *argv[]) { + setlocale(LC_CTYPE, ""); + + bool debug = false; + bool size = false; + bool hide = false; + + for (int opt; 0 < (opt = getopt(argc, argv, "Bb:df:h:nsw:"));) { + switch (opt) { + break; case 'B': bright = true; + break; case 'b': defaultBg = atoi(optarg); + break; case 'd': debug = true; + break; case 'f': defaultFg = atoi(optarg); + break; case 'h': rows = atoi(optarg); + break; case 'n': hide = true; + break; case 's': size = true; + break; case 'w': cols = atoi(optarg); + break; default: return EX_USAGE; + } + } + if (optind < argc) { + yyin = fopen(argv[optind], "r"); + if (!yyin) err(EX_NOINPUT, "%s", argv[optind]); + } + + if (size) { + struct winsize win; + int error = ioctl(STDERR_FILENO, TIOCGWINSZ, &win); + if (error) err(EX_IOERR, "ioctl"); + cols = win.ws_col; + rows = win.ws_row; + } + scr.bot = rows; + + cells = calloc(cols * rows, sizeof(*cells)); + if (!cells) err(EX_OSERR, "calloc"); + erase(cell(0, 0), cell(rows-1, cols)); + + bool mc = false; + for (int cc; (cc = yylex());) { + if (cc == MC) { + mc = true; + html(); + } else { + update(cc); + } + if (debug && cc != Data) { + printf("%s", Debug[cc]); + for (int i = 0; i < pn; ++i) { + printf("%s%d", (i ? ", " : " "), ps[i]); + } + printf("\n"); + html(); + } + } + if (hide) mode &= ~Cursor; + if (!mc) html(); +} |