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musique/lib/bestline/bestline.c

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/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:4;tab-width:8;coding:utf-8 -*-│
│vi: set net ft=c ts=4 sts=4 sw=4 fenc=utf-8 :vi│
╞══════════════════════════════════════════════════════════════════════════════╡
│ │
│ Bestline ── Library for interactive pseudoteletypewriter command │
│ sessions using ANSI Standard X3.64 control sequences │
│ │
│ OVERVIEW │
│ │
│ Bestline is a fork of linenoise (a popular readline alternative) │
│ that fixes its bugs and adds the missing features while reducing │
│ binary footprint (surprisingly) by removing bloated dependencies │
│ which means you can finally have a permissively-licensed command │
│ prompt w/ a 30kb footprint that's nearly as good as gnu readline │
│ │
│ EXAMPLE │
│ │
│ main() { │
│ char *line; │
│ while ((line = bestlineWithHistory("IN> ", "foo"))) { │
│ fputs("OUT> ", stdout); │
│ fputs(line, stdout); │
│ fputs("\n", stdout); │
│ free(line); │
│ } │
│ } │
│ │
│ CHANGES │
│ │
│ - Remove bell │
│ - Add kill ring │
│ - Fix flickering │
│ - Add UTF-8 editing │
│ - Add CTRL-R search │
│ - Support unlimited lines │
│ - Add parentheses awareness │
│ - React to terminal resizing │
│ - Don't generate .data section │
│ - Support terminal flow control │
│ - Make history loading 10x faster │
│ - Make multiline mode the only mode │
│ - Accommodate O_NONBLOCK file descriptors │
│ - Restore raw mode on process foregrounding │
│ - Make source code compatible with C++ compilers │
│ - Fix corruption issues by using generalized parsing │
│ - Implement nearly all GNU readline editing shortcuts │
│ - Remove heavyweight dependencies like printf/sprintf │
│ - Remove ISIG→^C→EAGAIN hack and use ephemeral handlers │
│ - Support running on Windows in MinTTY or CMD.EXE on Win10+ │
│ - Support diacratics, русский, Ελληνικά, 中国人, 日本語, 한국인 │
│ │
│ SHORTCUTS │
│ │
│ CTRL-E END │
│ CTRL-A START │
│ CTRL-B BACK │
│ CTRL-F FORWARD │
│ CTRL-L CLEAR │
│ CTRL-H BACKSPACE │
│ CTRL-D DELETE │
│ CTRL-Y YANK │
│ CTRL-D EOF (IF EMPTY) │
│ CTRL-N NEXT HISTORY │
│ CTRL-P PREVIOUS HISTORY │
│ CTRL-R SEARCH HISTORY │
│ CTRL-G CANCEL SEARCH │
│ ALT-< BEGINNING OF HISTORY │
│ ALT-> END OF HISTORY │
│ ALT-F FORWARD WORD │
│ ALT-B BACKWARD WORD │
│ CTRL-ALT-F FORWARD EXPR │
│ CTRL-ALT-B BACKWARD EXPR │
│ ALT-RIGHT FORWARD EXPR │
│ ALT-LEFT BACKWARD EXPR │
│ ALT-SHIFT-B BARF EXPR │
│ ALT-SHIFT-S SLURP EXPR │
│ ALT-SHIFT-R RAISE EXPR │
│ CTRL-K KILL LINE FORWARDS │
│ CTRL-U KILL LINE BACKWARDS │
│ ALT-H KILL WORD BACKWARDS │
│ CTRL-W KILL WORD BACKWARDS │
│ CTRL-ALT-H KILL WORD BACKWARDS │
│ ALT-D KILL WORD FORWARDS │
│ ALT-Y ROTATE KILL RING AND YANK AGAIN │
│ ALT-\ SQUEEZE ADJACENT WHITESPACE │
│ CTRL-T TRANSPOSE │
│ ALT-T TRANSPOSE WORD │
│ ALT-U UPPERCASE WORD │
│ ALT-L LOWERCASE WORD │
│ ALT-C CAPITALIZE WORD │
│ CTRL-Z SUSPEND PROCESS │
│ CTRL-\ QUIT PROCESS │
│ CTRL-S PAUSE OUTPUT │
│ CTRL-Q UNPAUSE OUTPUT (IF PAUSED) │
│ CTRL-Q ESCAPED INSERT │
│ CTRL-SPACE SET MARK │
│ CTRL-X CTRL-X GOTO MARK │
│ PROTIP REMAP CAPS LOCK TO CTRL │
│ │
╞══════════════════════════════════════════════════════════════════════════════╡
│ │
│ Copyright 2018-2021 Justine Tunney <jtunney@gmail.com> │
│ Copyright 2010-2016 Salvatore Sanfilippo <antirez@gmail.com> │
│ Copyright 2010-2013 Pieter Noordhuis <pcnoordhuis@gmail.com> │
│ │
│ All rights reserved. │
│ │
│ Redistribution and use in source and binary forms, with or without │
│ modification, are permitted provided that the following conditions are │
│ met: │
│ │
│ * Redistributions of source code must retain the above copyright │
│ notice, this list of conditions and the following disclaimer. │
│ │
│ * Redistributions in binary form must reproduce the above copyright │
│ notice, this list of conditions and the following disclaimer in the │
│ documentation and/or other materials provided with the distribution. │
│ │
│ THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS │
│ "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT │
│ LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR │
│ A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT │
│ HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, │
│ SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT │
│ LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, │
│ DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY │
│ THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT │
│ (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE │
│ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. │
│ │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "bestline.h"
#ifndef __COSMOPOLITAN__
#define _POSIX_C_SOURCE 1 /* so GCC builds in ANSI mode */
#define _XOPEN_SOURCE 700 /* so GCC builds in ANSI mode */
#define _DARWIN_C_SOURCE 1 /* so SIGWINCH / IUTF8 on XNU */
#include <termios.h>
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <errno.h>
#include <string.h>
#include <stdlib.h>
#include <ctype.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <sys/ioctl.h>
#include <sys/mman.h>
#include <unistd.h>
#include <setjmp.h>
#include <poll.h>
#include <assert.h>
#include <signal.h>
#include <fcntl.h>
#include <limits.h>
#ifndef SIGWINCH
#define SIGWINCH 28 /* GNU/Systemd + XNU + FreeBSD + NetBSD + OpenBSD */
#endif
#ifndef IUTF8
#define IUTF8 0
#endif
#endif
__asm__(".ident\t\"\\n\\n\
Bestline (BSD-2)\\n\
Copyright 2018-2020 Justine Tunney <jtunney@gmail.com>\\n\
Copyright 2010-2016 Salvatore Sanfilippo <antirez@gmail.com>\\n\
Copyright 2010-2013 Pieter Noordhuis <pcnoordhuis@gmail.com>\"");
#ifndef BESTLINE_MAX_RING
#define BESTLINE_MAX_RING 8
#endif
#ifndef BESTLINE_MAX_HISTORY
#define BESTLINE_MAX_HISTORY 1024
#endif
#define BESTLINE_HISTORY_FIRST +BESTLINE_MAX_HISTORY
#define BESTLINE_HISTORY_PREV +1
#define BESTLINE_HISTORY_NEXT -1
#define BESTLINE_HISTORY_LAST -BESTLINE_MAX_HISTORY
#define Ctrl(C) ((C) ^ 0100)
#define Min(X, Y) ((Y) > (X) ? (X) : (Y))
#define Max(X, Y) ((Y) < (X) ? (X) : (Y))
#define Case(X, Y) case X: Y; break
#define Read16le(X) \
((255 & (X)[0]) << 000 | \
(255 & (X)[1]) << 010)
#define Read32le(X) \
((unsigned)(255 & (X)[0]) << 000 | \
(unsigned)(255 & (X)[1]) << 010 | \
(unsigned)(255 & (X)[2]) << 020 | \
(unsigned)(255 & (X)[3]) << 030)
struct abuf {
char *b;
unsigned len;
unsigned cap;
};
struct rune {
unsigned c;
unsigned n;
};
struct bestlineRing {
unsigned i;
char *p[BESTLINE_MAX_RING];
};
/* The bestlineState structure represents the state during line editing.
* We pass this state to functions implementing specific editing
* functionalities. */
struct bestlineState {
int ifd; /* terminal stdin file descriptor */
int ofd; /* terminal stdout file descriptor */
struct winsize ws; /* rows and columns in terminal */
char *buf; /* edited line buffer */
const char *prompt; /* prompt to display */
int hindex; /* history index */
int rows; /* rows being used */
int oldpos; /* previous refresh cursor position */
unsigned buflen; /* edited line buffer size */
unsigned pos; /* current buffer index */
unsigned len; /* current edited line length */
unsigned mark; /* saved cursor position */
unsigned yi, yj; /* boundaries of last yank */
char seq[2][16]; /* keystroke history for yanking code */
char final; /* set to true on last update */
char dirty; /* if an update was squashed */
};
static const char *const kUnsupported[] = {"dumb","cons25","emacs"};
static int gotint;
static int gotcont;
static int gotwinch;
static signed char rawmode;
static char maskmode;
static char ispaused;
static char iscapital;
static unsigned historylen;
static struct bestlineRing ring;
static struct sigaction orig_cont;
static struct sigaction orig_winch;
static struct termios orig_termios;
static char *history[BESTLINE_MAX_HISTORY];
static bestlineXlatCallback *xlatCallback;
static bestlineHintsCallback *hintsCallback;
static bestlineFreeHintsCallback *freeHintsCallback;
static bestlineCompletionCallback *completionCallback;
static void bestlineAtExit(void);
static void bestlineRefreshLine(struct bestlineState *);
static void bestlineOnInt(int sig) {
gotint = sig;
}
static void bestlineOnCont(int sig) {
gotcont = sig;
}
static void bestlineOnWinch(int sig) {
gotwinch = sig;
}
static char IsControl(unsigned c) {
return c <= 0x1F || (0x7F <= c && c <= 0x9F);
}
static int GetMonospaceCharacterWidth(unsigned c) {
return !IsControl(c)
+ (c >= 0x1100 &&
(c <= 0x115f || c == 0x2329 || c == 0x232a ||
(c >= 0x2e80 && c <= 0xa4cf && c != 0x303f) ||
(c >= 0xac00 && c <= 0xd7a3) ||
(c >= 0xf900 && c <= 0xfaff) ||
(c >= 0xfe10 && c <= 0xfe19) ||
(c >= 0xfe30 && c <= 0xfe6f) ||
(c >= 0xff00 && c <= 0xff60) ||
(c >= 0xffe0 && c <= 0xffe6) ||
(c >= 0x20000 && c <= 0x2fffd) ||
(c >= 0x30000 && c <= 0x3fffd)));
}
/**
* Returns nonzero if 𝑐 isn't alphanumeric.
*
* Line reading interfaces generally define this operation as UNICODE
* characters that aren't in the letter category (Lu, Ll, Lt, Lm, Lo)
* and aren't in the number categorie (Nd, Nl, No). We also add a few
* other things like blocks and emoji (So).
*/
char bestlineIsSeparator(unsigned c) {
int m, l, r, n;
if (c < 0200) {
return !(('0' <= c && c <= '9') ||
('A' <= c && c <= 'Z') ||
('a' <= c && c <= 'z'));
}
if (c <= 0xffff) {
static const unsigned short kGlyphs[][2] = {
{0x00aa, 0x00aa}, /* 1x English */
{0x00b2, 0x00b3}, /* 2x English Arabic */
{0x00b5, 0x00b5}, /* 1x Greek */
{0x00b9, 0x00ba}, /* 2x English Arabic */
{0x00bc, 0x00be}, /* 3x Vulgar English Arabic */
{0x00c0, 0x00d6}, /* 23x Watin */
{0x00d8, 0x00f6}, /* 31x Watin */
{0x0100, 0x02c1}, /* 450x Watin-AB,IPA,Spacemod */
{0x02c6, 0x02d1}, /* 12x Spacemod */
{0x02e0, 0x02e4}, /* 5x Spacemod */
{0x02ec, 0x02ec}, /* 1x Spacemod */
{0x02ee, 0x02ee}, /* 1x Spacemod */
{0x0370, 0x0374}, /* 5x Greek */
{0x0376, 0x0377}, /* 2x Greek */
{0x037a, 0x037d}, /* 4x Greek */
{0x037f, 0x037f}, /* 1x Greek */
{0x0386, 0x0386}, /* 1x Greek */
{0x0388, 0x038a}, /* 3x Greek */
{0x038c, 0x038c}, /* 1x Greek */
{0x038e, 0x03a1}, /* 20x Greek */
{0x03a3, 0x03f5}, /* 83x Greek */
{0x03f7, 0x0481}, /* 139x Greek */
{0x048a, 0x052f}, /* 166x Cyrillic */
{0x0531, 0x0556}, /* 38x Armenian */
{0x0560, 0x0588}, /* 41x Armenian */
{0x05d0, 0x05ea}, /* 27x Hebrew */
{0x0620, 0x064a}, /* 43x Arabic */
{0x0660, 0x0669}, /* 10x Arabic */
{0x0671, 0x06d3}, /* 99x Arabic */
{0x06ee, 0x06fc}, /* 15x Arabic */
{0x0712, 0x072f}, /* 30x Syriac */
{0x074d, 0x07a5}, /* 89x Syriac,Arabic2,Thaana */
{0x07c0, 0x07ea}, /* 43x NKo */
{0x0800, 0x0815}, /* 22x Samaritan */
{0x0840, 0x0858}, /* 25x Mandaic */
{0x0904, 0x0939}, /* 54x Devanagari */
{0x0993, 0x09a8}, /* 22x Bengali */
{0x09e6, 0x09f1}, /* 12x Bengali */
{0x0a13, 0x0a28}, /* 22x Gurmukhi */
{0x0a66, 0x0a6f}, /* 10x Gurmukhi */
{0x0a93, 0x0aa8}, /* 22x Gujarati */
{0x0b13, 0x0b28}, /* 22x Oriya */
{0x0c92, 0x0ca8}, /* 23x Kannada */
{0x0caa, 0x0cb3}, /* 10x Kannada */
{0x0ce6, 0x0cef}, /* 10x Kannada */
{0x0d12, 0x0d3a}, /* 41x Malayalam */
{0x0d85, 0x0d96}, /* 18x Sinhala */
{0x0d9a, 0x0db1}, /* 24x Sinhala */
{0x0de6, 0x0def}, /* 10x Sinhala */
{0x0e01, 0x0e30}, /* 48x Thai */
{0x0e8c, 0x0ea3}, /* 24x Lao */
{0x0f20, 0x0f33}, /* 20x Tibetan */
{0x0f49, 0x0f6c}, /* 36x Tibetan */
{0x109e, 0x10c5}, /* 40x Myanmar,Georgian */
{0x10d0, 0x10fa}, /* 43x Georgian */
{0x10fc, 0x1248}, /* 333x Georgian,Hangul,Ethiopic */
{0x13a0, 0x13f5}, /* 86x Cherokee */
{0x1401, 0x166d}, /* 621x Aboriginal */
{0x16a0, 0x16ea}, /* 75x Runic */
{0x1700, 0x170c}, /* 13x Tagalog */
{0x1780, 0x17b3}, /* 52x Khmer */
{0x1820, 0x1878}, /* 89x Mongolian */
{0x1a00, 0x1a16}, /* 23x Buginese */
{0x1a20, 0x1a54}, /* 53x Tai Tham */
{0x1a80, 0x1a89}, /* 10x Tai Tham */
{0x1a90, 0x1a99}, /* 10x Tai Tham */
{0x1b05, 0x1b33}, /* 47x Balinese */
{0x1b50, 0x1b59}, /* 10x Balinese */
{0x1b83, 0x1ba0}, /* 30x Sundanese */
{0x1bae, 0x1be5}, /* 56x Sundanese */
{0x1c90, 0x1cba}, /* 43x Georgian2 */
{0x1cbd, 0x1cbf}, /* 3x Georgian2 */
{0x1e00, 0x1f15}, /* 278x Watin-C,Greek2 */
{0x2070, 0x2071}, /* 2x Supersub */
{0x2074, 0x2079}, /* 6x Supersub */
{0x207f, 0x2089}, /* 11x Supersub */
{0x2090, 0x209c}, /* 13x Supersub */
{0x2100, 0x2117}, /* 24x Letterlike */
{0x2119, 0x213f}, /* 39x Letterlike */
{0x2145, 0x214a}, /* 6x Letterlike */
{0x214c, 0x218b}, /* 64x Letterlike,Numbery */
{0x21af, 0x21cd}, /* 31x Arrows */
{0x21d5, 0x21f3}, /* 31x Arrows */
{0x230c, 0x231f}, /* 20x Technical */
{0x232b, 0x237b}, /* 81x Technical */
{0x237d, 0x239a}, /* 30x Technical */
{0x23b4, 0x23db}, /* 40x Technical */
{0x23e2, 0x2426}, /* 69x Technical,ControlPictures */
{0x2460, 0x25b6}, /* 343x Enclosed,Boxes,Blocks,Shapes */
{0x25c2, 0x25f7}, /* 54x Shapes */
{0x2600, 0x266e}, /* 111x Symbols */
{0x2670, 0x2767}, /* 248x Symbols,Dingbats */
{0x2776, 0x27bf}, /* 74x Dingbats */
{0x2800, 0x28ff}, /* 256x Braille */
{0x2c00, 0x2c2e}, /* 47x Glagolitic */
{0x2c30, 0x2c5e}, /* 47x Glagolitic */
{0x2c60, 0x2ce4}, /* 133x Watin-D */
{0x2d00, 0x2d25}, /* 38x Georgian2 */
{0x2d30, 0x2d67}, /* 56x Tifinagh */
{0x2d80, 0x2d96}, /* 23x Ethiopic2 */
{0x2e2f, 0x2e2f}, /* 1x Punctuation2 */
{0x3005, 0x3007}, /* 3x CJK Symbols & Punctuation */
{0x3021, 0x3029}, /* 9x CJK Symbols & Punctuation */
{0x3031, 0x3035}, /* 5x CJK Symbols & Punctuation */
{0x3038, 0x303c}, /* 5x CJK Symbols & Punctuation */
{0x3041, 0x3096}, /* 86x Hiragana */
{0x30a1, 0x30fa}, /* 90x Katakana */
{0x3105, 0x312f}, /* 43x Bopomofo */
{0x3131, 0x318e}, /* 94x Hangul Compatibility Jamo */
{0x31a0, 0x31ba}, /* 27x Bopomofo Extended */
{0x31f0, 0x31ff}, /* 16x Katakana Phonetic Extensions */
{0x3220, 0x3229}, /* 10x Enclosed CJK Letters & Months */
{0x3248, 0x324f}, /* 8x Enclosed CJK Letters & Months */
{0x3251, 0x325f}, /* 15x Enclosed CJK Letters & Months */
{0x3280, 0x3289}, /* 10x Enclosed CJK Letters & Months */
{0x32b1, 0x32bf}, /* 15x Enclosed CJK Letters & Months */
{0x3400, 0x4db5}, /* 6582x CJK Unified Ideographs Extension A */
{0x4dc0, 0x9fef}, /* 21040x Yijing Hexagram, CJK Unified Ideographs */
{0xa000, 0xa48c}, /* 1165x Yi Syllables */
{0xa4d0, 0xa4fd}, /* 46x Lisu */
{0xa500, 0xa60c}, /* 269x Vai */
{0xa610, 0xa62b}, /* 28x Vai */
{0xa6a0, 0xa6ef}, /* 80x Bamum */
{0xa80c, 0xa822}, /* 23x Syloti Nagri */
{0xa840, 0xa873}, /* 52x Phags-pa */
{0xa882, 0xa8b3}, /* 50x Saurashtra */
{0xa8d0, 0xa8d9}, /* 10x Saurashtra */
{0xa900, 0xa925}, /* 38x Kayah Li */
{0xa930, 0xa946}, /* 23x Rejang */
{0xa960, 0xa97c}, /* 29x Hangul Jamo Extended-A */
{0xa984, 0xa9b2}, /* 47x Javanese */
{0xa9cf, 0xa9d9}, /* 11x Javanese */
{0xaa00, 0xaa28}, /* 41x Cham */
{0xaa50, 0xaa59}, /* 10x Cham */
{0xabf0, 0xabf9}, /* 10x Meetei Mayek */
{0xac00, 0xd7a3}, /* 11172x Hangul Syllables */
{0xf900, 0xfa6d}, /* 366x CJK Compatibility Ideographs */
{0xfa70, 0xfad9}, /* 106x CJK Compatibility Ideographs */
{0xfb1f, 0xfb28}, /* 10x Alphabetic Presentation Forms */
{0xfb2a, 0xfb36}, /* 13x Alphabetic Presentation Forms */
{0xfb46, 0xfbb1}, /* 108x Alphabetic Presentation Forms */
{0xfbd3, 0xfd3d}, /* 363x Arabic Presentation Forms-A */
{0xfe76, 0xfefc}, /* 135x Arabic Presentation Forms-B */
{0xff10, 0xff19}, /* 10x Dubs */
{0xff21, 0xff3a}, /* 26x Dubs */
{0xff41, 0xff5a}, /* 26x Dubs */
{0xff66, 0xffbe}, /* 89x Dubs */
{0xffc2, 0xffc7}, /* 6x Dubs */
{0xffca, 0xffcf}, /* 6x Dubs */
{0xffd2, 0xffd7}, /* 6x Dubs */
{0xffda, 0xffdc}, /* 3x Dubs */
};
l = 0;
r = n = sizeof(kGlyphs) / sizeof(kGlyphs[0]);
while (l < r) {
m = (l + r) >> 1;
if (kGlyphs[m][1] < c) {
l = m + 1;
} else {
r = m;
}
}
return !(l < n && kGlyphs[l][0] <= c && c <= kGlyphs[l][1]);
} else {
static const unsigned kAstralGlyphs[][2] = {
{0x10107, 0x10133}, /* 45x Aegean */
{0x10140, 0x10178}, /* 57x Ancient Greek Numbers */
{0x1018a, 0x1018b}, /* 2x Ancient Greek Numbers */
{0x10280, 0x1029c}, /* 29x Lycian */
{0x102a0, 0x102d0}, /* 49x Carian */
{0x102e1, 0x102fb}, /* 27x Coptic Epact Numbers */
{0x10300, 0x10323}, /* 36x Old Italic */
{0x1032d, 0x1034a}, /* 30x Old Italic, Gothic */
{0x10350, 0x10375}, /* 38x Old Permic */
{0x10380, 0x1039d}, /* 30x Ugaritic */
{0x103a0, 0x103c3}, /* 36x Old Persian */
{0x103c8, 0x103cf}, /* 8x Old Persian */
{0x103d1, 0x103d5}, /* 5x Old Persian */
{0x10400, 0x1049d}, /* 158x Deseret, Shavian, Osmanya */
{0x104b0, 0x104d3}, /* 36x Osage */
{0x104d8, 0x104fb}, /* 36x Osage */
{0x10500, 0x10527}, /* 40x Elbasan */
{0x10530, 0x10563}, /* 52x Caucasian Albanian */
{0x10600, 0x10736}, /* 311x Linear A */
{0x10800, 0x10805}, /* 6x Cypriot Syllabary */
{0x1080a, 0x10835}, /* 44x Cypriot Syllabary */
{0x10837, 0x10838}, /* 2x Cypriot Syllabary */
{0x1083f, 0x1089e}, /* 86x Cypriot,ImperialAramaic,Palmyrene,Nabataean */
{0x108e0, 0x108f2}, /* 19x Hatran */
{0x108f4, 0x108f5}, /* 2x Hatran */
{0x108fb, 0x1091b}, /* 33x Hatran */
{0x10920, 0x10939}, /* 26x Lydian */
{0x10980, 0x109b7}, /* 56x Meroitic Hieroglyphs */
{0x109bc, 0x109cf}, /* 20x Meroitic Cursive */
{0x109d2, 0x10a00}, /* 47x Meroitic Cursive */
{0x10a10, 0x10a13}, /* 4x Kharoshthi */
{0x10a15, 0x10a17}, /* 3x Kharoshthi */
{0x10a19, 0x10a35}, /* 29x Kharoshthi */
{0x10a40, 0x10a48}, /* 9x Kharoshthi */
{0x10a60, 0x10a7e}, /* 31x Old South Arabian */
{0x10a80, 0x10a9f}, /* 32x Old North Arabian */
{0x10ac0, 0x10ac7}, /* 8x Manichaean */
{0x10ac9, 0x10ae4}, /* 28x Manichaean */
{0x10aeb, 0x10aef}, /* 5x Manichaean */
{0x10b00, 0x10b35}, /* 54x Avestan */
{0x10b40, 0x10b55}, /* 22x Inscriptional Parthian */
{0x10b58, 0x10b72}, /* 27x Inscriptional Parthian and Pahlavi */
{0x10b78, 0x10b91}, /* 26x Inscriptional Pahlavi, Psalter Pahlavi */
{0x10c00, 0x10c48}, /* 73x Old Turkic */
{0x10c80, 0x10cb2}, /* 51x Old Hungarian */
{0x10cc0, 0x10cf2}, /* 51x Old Hungarian */
{0x10cfa, 0x10d23}, /* 42x Old Hungarian, Hanifi Rohingya */
{0x10d30, 0x10d39}, /* 10x Hanifi Rohingya */
{0x10e60, 0x10e7e}, /* 31x Rumi Numeral Symbols */
{0x10f00, 0x10f27}, /* 40x Old Sogdian */
{0x10f30, 0x10f45}, /* 22x Sogdian */
{0x10f51, 0x10f54}, /* 4x Sogdian */
{0x10fe0, 0x10ff6}, /* 23x Elymaic */
{0x11003, 0x11037}, /* 53x Brahmi */
{0x11052, 0x1106f}, /* 30x Brahmi */
{0x11083, 0x110af}, /* 45x Kaithi */
{0x110d0, 0x110e8}, /* 25x Sora Sompeng */
{0x110f0, 0x110f9}, /* 10x Sora Sompeng */
{0x11103, 0x11126}, /* 36x Chakma */
{0x11136, 0x1113f}, /* 10x Chakma */
{0x11144, 0x11144}, /* 1x Chakma */
{0x11150, 0x11172}, /* 35x Mahajani */
{0x11176, 0x11176}, /* 1x Mahajani */
{0x11183, 0x111b2}, /* 48x Sharada */
{0x111c1, 0x111c4}, /* 4x Sharada */
{0x111d0, 0x111da}, /* 11x Sharada */
{0x111dc, 0x111dc}, /* 1x Sharada */
{0x111e1, 0x111f4}, /* 20x Sinhala Archaic Numbers */
{0x11200, 0x11211}, /* 18x Khojki */
{0x11213, 0x1122b}, /* 25x Khojki */
{0x11280, 0x11286}, /* 7x Multani */
{0x11288, 0x11288}, /* 1x Multani */
{0x1128a, 0x1128d}, /* 4x Multani */
{0x1128f, 0x1129d}, /* 15x Multani */
{0x1129f, 0x112a8}, /* 10x Multani */
{0x112b0, 0x112de}, /* 47x Khudawadi */
{0x112f0, 0x112f9}, /* 10x Khudawadi */
{0x11305, 0x1130c}, /* 8x Grantha */
{0x1130f, 0x11310}, /* 2x Grantha */
{0x11313, 0x11328}, /* 22x Grantha */
{0x1132a, 0x11330}, /* 7x Grantha */
{0x11332, 0x11333}, /* 2x Grantha */
{0x11335, 0x11339}, /* 5x Grantha */
{0x1133d, 0x1133d}, /* 1x Grantha */
{0x11350, 0x11350}, /* 1x Grantha */
{0x1135d, 0x11361}, /* 5x Grantha */
{0x11400, 0x11434}, /* 53x Newa */
{0x11447, 0x1144a}, /* 4x Newa */
{0x11450, 0x11459}, /* 10x Newa */
{0x1145f, 0x1145f}, /* 1x Newa */
{0x11480, 0x114af}, /* 48x Tirhuta */
{0x114c4, 0x114c5}, /* 2x Tirhuta */
{0x114c7, 0x114c7}, /* 1x Tirhuta */
{0x114d0, 0x114d9}, /* 10x Tirhuta */
{0x11580, 0x115ae}, /* 47x Siddham */
{0x115d8, 0x115db}, /* 4x Siddham */
{0x11600, 0x1162f}, /* 48x Modi */
{0x11644, 0x11644}, /* 1x Modi */
{0x11650, 0x11659}, /* 10x Modi */
{0x11680, 0x116aa}, /* 43x Takri */
{0x116b8, 0x116b8}, /* 1x Takri */
{0x116c0, 0x116c9}, /* 10x Takri */
{0x11700, 0x1171a}, /* 27x Ahom */
{0x11730, 0x1173b}, /* 12x Ahom */
{0x11800, 0x1182b}, /* 44x Dogra */
{0x118a0, 0x118f2}, /* 83x Warang Citi */
{0x118ff, 0x118ff}, /* 1x Warang Citi */
{0x119a0, 0x119a7}, /* 8x Nandinagari */
{0x119aa, 0x119d0}, /* 39x Nandinagari */
{0x119e1, 0x119e1}, /* 1x Nandinagari */
{0x119e3, 0x119e3}, /* 1x Nandinagari */
{0x11a00, 0x11a00}, /* 1x Zanabazar Square */
{0x11a0b, 0x11a32}, /* 40x Zanabazar Square */
{0x11a3a, 0x11a3a}, /* 1x Zanabazar Square */
{0x11a50, 0x11a50}, /* 1x Soyombo */
{0x11a5c, 0x11a89}, /* 46x Soyombo */
{0x11a9d, 0x11a9d}, /* 1x Soyombo */
{0x11ac0, 0x11af8}, /* 57x Pau Cin Hau */
{0x11c00, 0x11c08}, /* 9x Bhaiksuki */
{0x11c0a, 0x11c2e}, /* 37x Bhaiksuki */
{0x11c40, 0x11c40}, /* 1x Bhaiksuki */
{0x11c50, 0x11c6c}, /* 29x Bhaiksuki */
{0x11c72, 0x11c8f}, /* 30x Marchen */
{0x11d00, 0x11d06}, /* 7x Masaram Gondi */
{0x11d08, 0x11d09}, /* 2x Masaram Gondi */
{0x11d0b, 0x11d30}, /* 38x Masaram Gondi */
{0x11d46, 0x11d46}, /* 1x Masaram Gondi */
{0x11d50, 0x11d59}, /* 10x Masaram Gondi */
{0x11d60, 0x11d65}, /* 6x Gunjala Gondi */
{0x11d67, 0x11d68}, /* 2x Gunjala Gondi */
{0x11d6a, 0x11d89}, /* 32x Gunjala Gondi */
{0x11d98, 0x11d98}, /* 1x Gunjala Gondi */
{0x11da0, 0x11da9}, /* 10x Gunjala Gondi */
{0x11ee0, 0x11ef2}, /* 19x Makasar */
{0x11fc0, 0x11fd4}, /* 21x Tamil Supplement */
{0x12000, 0x12399}, /* 922x Cuneiform */
{0x12400, 0x1246e}, /* 111x Cuneiform Numbers & Punctuation */
{0x12480, 0x12543}, /* 196x Early Dynastic Cuneiform */
{0x13000, 0x1342e}, /* 1071x Egyptian Hieroglyphs */
{0x14400, 0x14646}, /* 583x Anatolian Hieroglyphs */
{0x16800, 0x16a38}, /* 569x Bamum Supplement */
{0x16a40, 0x16a5e}, /* 31x Mro */
{0x16a60, 0x16a69}, /* 10x Mro */
{0x16ad0, 0x16aed}, /* 30x Bassa Vah */
{0x16b00, 0x16b2f}, /* 48x Pahawh Hmong */
{0x16b40, 0x16b43}, /* 4x Pahawh Hmong */
{0x16b50, 0x16b59}, /* 10x Pahawh Hmong */
{0x16b5b, 0x16b61}, /* 7x Pahawh Hmong */
{0x16b63, 0x16b77}, /* 21x Pahawh Hmong */
{0x16b7d, 0x16b8f}, /* 19x Pahawh Hmong */
{0x16e40, 0x16e96}, /* 87x Medefaidrin */
{0x16f00, 0x16f4a}, /* 75x Miao */
{0x16f50, 0x16f50}, /* 1x Miao */
{0x16f93, 0x16f9f}, /* 13x Miao */
{0x16fe0, 0x16fe1}, /* 2x Ideographic Symbols & Punctuation */
{0x16fe3, 0x16fe3}, /* 1x Ideographic Symbols & Punctuation */
{0x17000, 0x187f7}, /* 6136x Tangut */
{0x18800, 0x18af2}, /* 755x Tangut Components */
{0x1b000, 0x1b11e}, /* 287x Kana Supplement */
{0x1b150, 0x1b152}, /* 3x Small Kana Extension */
{0x1b164, 0x1b167}, /* 4x Small Kana Extension */
{0x1b170, 0x1b2fb}, /* 396x Nushu */
{0x1bc00, 0x1bc6a}, /* 107x Duployan */
{0x1bc70, 0x1bc7c}, /* 13x Duployan */
{0x1bc80, 0x1bc88}, /* 9x Duployan */
{0x1bc90, 0x1bc99}, /* 10x Duployan */
{0x1d2e0, 0x1d2f3}, /* 20x Mayan Numerals */
{0x1d360, 0x1d378}, /* 25x Counting Rod Numerals */
{0x1d400, 0x1d454}, /* 85x 𝐀..𝑔 Math */
{0x1d456, 0x1d49c}, /* 71x 𝑖..𝒜 Math */
{0x1d49e, 0x1d49f}, /* 2x 𝒞..𝒟 Math */
{0x1d4a2, 0x1d4a2}, /* 1x 𝒢..𝒢 Math */
{0x1d4a5, 0x1d4a6}, /* 2x 𝒥..𝒦 Math */
{0x1d4a9, 0x1d4ac}, /* 4x 𝒩..𝒬 Math */
{0x1d4ae, 0x1d4b9}, /* 12x 𝒮..𝒹 Math */
{0x1d4bb, 0x1d4bb}, /* 1x 𝒻..𝒻 Math */
{0x1d4bd, 0x1d4c3}, /* 7x 𝒽..𝓃 Math */
{0x1d4c5, 0x1d505}, /* 65x 𝓅..𝔅 Math */
{0x1d507, 0x1d50a}, /* 4x 𝔇..𝔊 Math */
{0x1d50d, 0x1d514}, /* 8x 𝔍..𝔔 Math */
{0x1d516, 0x1d51c}, /* 7x 𝔖..𝔜 Math */
{0x1d51e, 0x1d539}, /* 28x 𝔞..𝔹 Math */
{0x1d53b, 0x1d53e}, /* 4x 𝔻..𝔾 Math */
{0x1d540, 0x1d544}, /* 5x 𝕀..𝕄 Math */
{0x1d546, 0x1d546}, /* 1x 𝕆..𝕆 Math */
{0x1d54a, 0x1d550}, /* 7x 𝕊..𝕐 Math */
{0x1d552, 0x1d6a5}, /* 340x 𝕒..𝚥 Math */
{0x1d6a8, 0x1d6c0}, /* 25x 𝚨..𝛀 Math */
{0x1d6c2, 0x1d6da}, /* 25x 𝛂..𝛚 Math */
{0x1d6dc, 0x1d6fa}, /* 31x 𝛜..𝛺 Math */
{0x1d6fc, 0x1d714}, /* 25x 𝛼..𝜔 Math */
{0x1d716, 0x1d734}, /* 31x 𝜖..𝜴 Math */
{0x1d736, 0x1d74e}, /* 25x 𝜶..𝝎 Math */
{0x1d750, 0x1d76e}, /* 31x 𝝐..𝝮 Math */
{0x1d770, 0x1d788}, /* 25x 𝝰..𝞈 Math */
{0x1d78a, 0x1d7a8}, /* 31x 𝞊..𝞨 Math */
{0x1d7aa, 0x1d7c2}, /* 25x 𝞪..𝟂 Math */
{0x1d7c4, 0x1d7cb}, /* 8x 𝟄..𝟋 Math */
{0x1d7ce, 0x1d9ff}, /* 562x Math, Sutton SignWriting */
{0x1f100, 0x1f10c}, /* 13x Enclosed Alphanumeric Supplement */
{0x20000, 0x2a6d6}, /* 42711x CJK Unified Ideographs Extension B */
{0x2a700, 0x2b734}, /* 4149x CJK Unified Ideographs Extension C */
{0x2b740, 0x2b81d}, /* 222x CJK Unified Ideographs Extension D */
{0x2b820, 0x2cea1}, /* 5762x CJK Unified Ideographs Extension E */
{0x2ceb0, 0x2ebe0}, /* 7473x CJK Unified Ideographs Extension F */
{0x2f800, 0x2fa1d}, /* 542x CJK Compatibility Ideographs Supplement */
};
l = 0;
r = n = sizeof(kAstralGlyphs) / sizeof(kAstralGlyphs[0]);
while (l < r) {
m = (l + r) >> 1;
if (kAstralGlyphs[m][1] < c) {
l = m + 1;
} else {
r = m;
}
}
return !(l < n && kAstralGlyphs[l][0] <= c && c <= kAstralGlyphs[l][1]);
}
}
unsigned bestlineLowercase(unsigned c) {
int m, l, r, n;
if (c < 0200) {
if ('A' <= c && c <= 'Z') {
return c + 32;
} else {
return c;
}
} else if (c <= 0xffff) {
if ((0x0100 <= c && c <= 0x0176) || /* 60x Ā..ā → ā..ŵ Watin-A */
(0x01de <= c && c <= 0x01ee) || /* 9x Ǟ..Ǯ → ǟ..ǯ Watin-B */
(0x01f8 <= c && c <= 0x021e) || /* 20x Ǹ..Ȟ → ǹ..ȟ Watin-B */
(0x0222 <= c && c <= 0x0232) || /* 9x Ȣ..Ȳ → ȣ..ȳ Watin-B */
(0x1e00 <= c && c <= 0x1eff)) { /*256x Ḁ..Ỿ → ḁ..ỿ Watin-C */
if (c == 0x0130) return c - 199;
if (c == 0x1e9e) return c;
return c + (~c & 1);
} else if (0x01cf <= c && c <= 0x01db) {
return c + (c & 1); /* 7x Ǐ..Ǜ → ǐ..ǜ Watin-B */
} else if (0x13a0 <= c && c <= 0x13ef) {
return c + 38864; /* 80x Ꭰ ..Ꮿ → ꭰ ..ꮿ Cherokee */
} else {
static const struct {
unsigned short a;
unsigned short b;
short d;
} kLower[] = {
{0x00c0, 0x00d6, +32}, /* 23x À ..Ö → à ..ö Watin */
{0x00d8, 0x00de, +32}, /* 7x Ø ..Þ → ø ..þ Watin */
{0x0178, 0x0178, -121}, /* 1x Ÿ ..Ÿ → ÿ ..ÿ Watin-A */
{0x0179, 0x0179, +1}, /* 1x Ź ..Ź → ź ..ź Watin-A */
{0x017b, 0x017b, +1}, /* 1x Ż ..Ż → ż ..ż Watin-A */
{0x017d, 0x017d, +1}, /* 1x Ž ..Ž → ž ..ž Watin-A */
{0x0181, 0x0181, +210}, /* 1x Ɓ ..Ɓ → ɓ ..ɓ Watin-B */
{0x0182, 0x0182, +1}, /* 1x Ƃ ..Ƃ → ƃ ..ƃ Watin-B */
{0x0184, 0x0184, +1}, /* 1x Ƅ ..Ƅ → ƅ ..ƅ Watin-B */
{0x0186, 0x0186, +206}, /* 1x Ɔ ..Ɔ → ɔ ..ɔ Watin-B */
{0x0187, 0x0187, +1}, /* 1x Ƈ ..Ƈ → ƈ ..ƈ Watin-B */
{0x0189, 0x018a, +205}, /* 2x Ɖ ..Ɗ → ɖ ..ɗ Watin-B */
{0x018b, 0x018b, +1}, /* 1x Ƌ ..Ƌ → ƌ ..ƌ Watin-B */
{0x018e, 0x018e, +79}, /* 1x Ǝ ..Ǝ → ǝ ..ǝ Watin-B */
{0x018f, 0x018f, +202}, /* 1x Ə ..Ə → ə ..ə Watin-B */
{0x0190, 0x0190, +203}, /* 1x Ɛ ..Ɛ → ɛ ..ɛ Watin-B */
{0x0191, 0x0191, +1}, /* 1x Ƒ ..Ƒ → ƒ ..ƒ Watin-B */
{0x0193, 0x0193, +205}, /* 1x Ɠ ..Ɠ → ɠ ..ɠ Watin-B */
{0x0194, 0x0194, +207}, /* 1x Ɣ ..Ɣ → ɣ ..ɣ Watin-B */
{0x0196, 0x0196, +211}, /* 1x Ɩ ..Ɩ → ɩ ..ɩ Watin-B */
{0x0197, 0x0197, +209}, /* 1x Ɨ ..Ɨ → ɨ ..ɨ Watin-B */
{0x0198, 0x0198, +1}, /* 1x Ƙ ..Ƙ → ƙ ..ƙ Watin-B */
{0x019c, 0x019c, +211}, /* 1x Ɯ ..Ɯ → ɯ ..ɯ Watin-B */
{0x019d, 0x019d, +213}, /* 1x Ɲ ..Ɲ → ɲ ..ɲ Watin-B */
{0x019f, 0x019f, +214}, /* 1x Ɵ ..Ɵ → ɵ ..ɵ Watin-B */
{0x01a0, 0x01a0, +1}, /* 1x Ơ ..Ơ → ơ ..ơ Watin-B */
{0x01a2, 0x01a2, +1}, /* 1x Ƣ ..Ƣ → ƣ ..ƣ Watin-B */
{0x01a4, 0x01a4, +1}, /* 1x Ƥ ..Ƥ → ƥ ..ƥ Watin-B */
{0x01a6, 0x01a6, +218}, /* 1x Ʀ ..Ʀ → ʀ ..ʀ Watin-B */
{0x01a7, 0x01a7, +1}, /* 1x Ƨ ..Ƨ → ƨ ..ƨ Watin-B */
{0x01a9, 0x01a9, +218}, /* 1x Ʃ ..Ʃ → ʃ ..ʃ Watin-B */
{0x01ac, 0x01ac, +1}, /* 1x Ƭ ..Ƭ → ƭ ..ƭ Watin-B */
{0x01ae, 0x01ae, +218}, /* 1x Ʈ ..Ʈ → ʈ ..ʈ Watin-B */
{0x01af, 0x01af, +1}, /* 1x Ư ..Ư → ư ..ư Watin-B */
{0x01b1, 0x01b2, +217}, /* 2x Ʊ ..Ʋ → ʊ ..ʋ Watin-B */
{0x01b3, 0x01b3, +1}, /* 1x Ƴ ..Ƴ → ƴ ..ƴ Watin-B */
{0x01b5, 0x01b5, +1}, /* 1x Ƶ ..Ƶ → ƶ ..ƶ Watin-B */
{0x01b7, 0x01b7, +219}, /* 1x Ʒ ..Ʒ → ʒ ..ʒ Watin-B */
{0x01b8, 0x01b8, +1}, /* 1x Ƹ ..Ƹ → ƹ ..ƹ Watin-B */
{0x01bc, 0x01bc, +1}, /* 1x Ƽ ..Ƽ → ƽ ..ƽ Watin-B */
{0x01c4, 0x01c4, +2}, /* 1x DŽ ..DŽ → dž ..dž Watin-B */
{0x01c5, 0x01c5, +1}, /* 1x Dž ..Dž → dž ..dž Watin-B */
{0x01c7, 0x01c7, +2}, /* 1x LJ ..LJ → lj ..lj Watin-B */
{0x01c8, 0x01c8, +1}, /* 1x Lj ..Lj → lj ..lj Watin-B */
{0x01ca, 0x01ca, +2}, /* 1x NJ ..NJ → nj ..nj Watin-B */
{0x01cb, 0x01cb, +1}, /* 1x Nj ..Nj → nj ..nj Watin-B */
{0x01cd, 0x01cd, +1}, /* 1x Ǎ ..Ǎ → ǎ ..ǎ Watin-B */
{0x01f1, 0x01f1, +2}, /* 1x DZ ..DZ → dz ..dz Watin-B */
{0x01f2, 0x01f2, +1}, /* 1x Dz ..Dz → dz ..dz Watin-B */
{0x01f4, 0x01f4, +1}, /* 1x Ǵ ..Ǵ → ǵ ..ǵ Watin-B */
{0x01f6, 0x01f6, -97}, /* 1x Ƕ ..Ƕ → ƕ ..ƕ Watin-B */
{0x01f7, 0x01f7, -56}, /* 1x Ƿ ..Ƿ → ƿ ..ƿ Watin-B */
{0x0220, 0x0220, -130}, /* 1x Ƞ ..Ƞ → ƞ ..ƞ Watin-B */
{0x023b, 0x023b, +1}, /* 1x Ȼ ..Ȼ → ȼ ..ȼ Watin-B */
{0x023d, 0x023d, -163}, /* 1x Ƚ ..Ƚ → ƚ ..ƚ Watin-B */
{0x0241, 0x0241, +1}, /* 1x Ɂ ..Ɂ → ɂ ..ɂ Watin-B */
{0x0243, 0x0243, -195}, /* 1x Ƀ ..Ƀ → ƀ ..ƀ Watin-B */
{0x0244, 0x0244, +69}, /* 1x Ʉ ..Ʉ → ʉ ..ʉ Watin-B */
{0x0245, 0x0245, +71}, /* 1x Ʌ ..Ʌ → ʌ ..ʌ Watin-B */
{0x0246, 0x0246, +1}, /* 1x Ɇ ..Ɇ → ɇ ..ɇ Watin-B */
{0x0248, 0x0248, +1}, /* 1x Ɉ ..Ɉ → ɉ ..ɉ Watin-B */
{0x024a, 0x024a, +1}, /* 1x Ɋ ..Ɋ → ɋ ..ɋ Watin-B */
{0x024c, 0x024c, +1}, /* 1x Ɍ ..Ɍ → ɍ ..ɍ Watin-B */
{0x024e, 0x024e, +1}, /* 1x Ɏ ..Ɏ → ɏ ..ɏ Watin-B */
{0x0386, 0x0386, +38}, /* 1x Ά ..Ά → ά ..ά Greek */
{0x0388, 0x038a, +37}, /* 3x Έ ..Ί → έ ..ί Greek */
{0x038c, 0x038c, +64}, /* 1x Ό ..Ό → ό ..ό Greek */
{0x038e, 0x038f, +63}, /* 2x Ύ ..Ώ → ύ ..ώ Greek */
{0x0391, 0x03a1, +32}, /* 17x Α ..Ρ → α ..ρ Greek */
{0x03a3, 0x03ab, +32}, /* 9x Σ ..Ϋ → σ ..ϋ Greek */
{0x03dc, 0x03dc, +1}, /* 1x Ϝ ..Ϝ → ϝ ..ϝ Greek */
{0x03f4, 0x03f4, -60}, /* 1x ϴ ..ϴ → θ ..θ Greek */
{0x0400, 0x040f, +80}, /* 16x Ѐ ..Џ → ѐ ..џ Cyrillic */
{0x0410, 0x042f, +32}, /* 32x А ..Я → а ..я Cyrillic */
{0x0460, 0x0460, +1}, /* 1x Ѡ ..Ѡ → ѡ ..ѡ Cyrillic */
{0x0462, 0x0462, +1}, /* 1x Ѣ ..Ѣ → ѣ ..ѣ Cyrillic */
{0x0464, 0x0464, +1}, /* 1x Ѥ ..Ѥ → ѥ ..ѥ Cyrillic */
{0x0472, 0x0472, +1}, /* 1x Ѳ ..Ѳ → ѳ ..ѳ Cyrillic */
{0x0490, 0x0490, +1}, /* 1x Ґ ..Ґ → ґ ..ґ Cyrillic */
{0x0498, 0x0498, +1}, /* 1x Ҙ ..Ҙ → ҙ ..ҙ Cyrillic */
{0x049a, 0x049a, +1}, /* 1x Қ ..Қ → қ ..қ Cyrillic */
{0x0531, 0x0556, +48}, /* 38x Ա ..Ֆ → ա ..ֆ Armenian */
{0x10a0, 0x10c5, +7264}, /* 38x Ⴀ ..Ⴥ → ⴀ ..ⴥ Georgian */
{0x10c7, 0x10c7, +7264}, /* 1x Ⴧ ..Ⴧ → ⴧ ..ⴧ Georgian */
{0x10cd, 0x10cd, +7264}, /* 1x Ⴭ ..Ⴭ → ⴭ ..ⴭ Georgian */
{0x13f0, 0x13f5, +8}, /* 6x Ᏸ ..Ᏽ → ᏸ ..ᏽ Cherokee */
{0x1c90, 0x1cba, -3008}, /* 43x Ა ..Ჺ → ა ..ჺ Georgian2 */
{0x1cbd, 0x1cbf, -3008}, /* 3x Ჽ ..Ჿ → ჽ ..ჿ Georgian2 */
{0x1f08, 0x1f0f, -8}, /* 8x Ἀ ..Ἇ → ἀ ..ἇ Greek2 */
{0x1f18, 0x1f1d, -8}, /* 6x Ἐ ..Ἕ → ἐ ..ἕ Greek2 */
{0x1f28, 0x1f2f, -8}, /* 8x Ἠ ..Ἧ → ἠ ..ἧ Greek2 */
{0x1f38, 0x1f3f, -8}, /* 8x Ἰ ..Ἷ → ἰ ..ἷ Greek2 */
{0x1f48, 0x1f4d, -8}, /* 6x Ὀ ..Ὅ → ὀ ..ὅ Greek2 */
{0x1f59, 0x1f59, -8}, /* 1x Ὑ ..Ὑ → ὑ ..ὑ Greek2 */
{0x1f5b, 0x1f5b, -8}, /* 1x Ὓ ..Ὓ → ὓ ..ὓ Greek2 */
{0x1f5d, 0x1f5d, -8}, /* 1x Ὕ ..Ὕ → ὕ ..ὕ Greek2 */
{0x1f5f, 0x1f5f, -8}, /* 1x Ὗ ..Ὗ → ὗ ..ὗ Greek2 */
{0x1f68, 0x1f6f, -8}, /* 8x Ὠ ..Ὧ → ὠ ..ὧ Greek2 */
{0x1f88, 0x1f8f, -8}, /* 8x ᾈ ..ᾏ → ᾀ ..ᾇ Greek2 */
{0x1f98, 0x1f9f, -8}, /* 8x ᾘ ..ᾟ → ᾐ ..ᾗ Greek2 */
{0x1fa8, 0x1faf, -8}, /* 8x ᾨ ..ᾯ → ᾠ ..ᾧ Greek2 */
{0x1fb8, 0x1fb9, -8}, /* 2x Ᾰ ..Ᾱ → ᾰ ..ᾱ Greek2 */
{0x1fba, 0x1fbb, -74}, /* 2x Ὰ ..Ά → ὰ ..ά Greek2 */
{0x1fbc, 0x1fbc, -9}, /* 1x ᾼ ..ᾼ → ᾳ ..ᾳ Greek2 */
{0x1fc8, 0x1fcb, -86}, /* 4x Ὲ ..Ή → ὲ ..ή Greek2 */
{0x1fcc, 0x1fcc, -9}, /* 1x ῌ ..ῌ → ῃ ..ῃ Greek2 */
{0x1fd8, 0x1fd9, -8}, /* 2x Ῐ ..Ῑ → ῐ ..ῑ Greek2 */
{0x1fda, 0x1fdb, -100}, /* 2x Ὶ ..Ί → ὶ ..ί Greek2 */
{0x1fe8, 0x1fe9, -8}, /* 2x Ῠ ..Ῡ → ῠ ..ῡ Greek2 */
{0x1fea, 0x1feb, -112}, /* 2x Ὺ ..Ύ → ὺ ..ύ Greek2 */
{0x1fec, 0x1fec, -7}, /* 1x Ῥ ..Ῥ → ῥ ..ῥ Greek2 */
{0x1ff8, 0x1ff9, -128}, /* 2x Ὸ ..Ό → ὸ ..ό Greek2 */
{0x1ffa, 0x1ffb, -126}, /* 2x Ὼ ..Ώ → ὼ ..ώ Greek2 */
{0x1ffc, 0x1ffc, -9}, /* 1x ῼ ..ῼ → ῳ ..ῳ Greek2 */
{0x2126, 0x2126, -7517}, /* 1x Ω ..Ω → ω ..ω Letterlike */
{0x212a, 0x212a, -8383}, /* 1x K ..K → k ..k Letterlike */
{0x212b, 0x212b, -8262}, /* 1x Å ..Å → å ..å Letterlike */
{0x2132, 0x2132, +28}, /* 1x Ⅎ ..Ⅎ → ⅎ ..ⅎ Letterlike */
{0x2160, 0x216f, +16}, /* 16x Ⅰ ..Ⅿ → ⅰ ..ⅿ Numbery */
{0x2183, 0x2183, +1}, /* 1x Ↄ ..Ↄ → ↄ ..ↄ Numbery */
{0x24b6, 0x24cf, +26}, /* 26x Ⓐ ..Ⓩ → ⓐ ..ⓩ Enclosed */
{0x2c00, 0x2c2e, +48}, /* 47x Ⰰ ..Ⱞ → ⰰ ..ⱞ Glagolitic */
{0xff21, 0xff3a, +32}, /* 26x Ａ..Ｚ → ａ..ｚ Dubs */
};
l = 0;
r = n = sizeof(kLower) / sizeof(kLower[0]);
while (l < r) {
m = (l + r) >> 1;
if (kLower[m].b < c) {
l = m + 1;
} else {
r = m;
}
}
if (l < n && kLower[l].a <= c && c <= kLower[l].b) {
return c + kLower[l].d;
} else {
return c;
}
}
} else {
static struct {
unsigned a;
unsigned b;
short d;
} kAstralLower[] = {
{0x10400, 0x10427, +40}, /* 40x 𐐀 ..𐐧 → 𐐨 ..𐑏 Deseret */
{0x104b0, 0x104d3, +40}, /* 36x 𐒰 ..𐓓 → 𐓘 ..𐓻 Osage */
{0x1d400, 0x1d419, +26}, /* 26x 𝐀 ..𝐙 → 𝐚 ..𝐳 Math */
{0x1d43c, 0x1d44d, +26}, /* 18x 𝐼 ..𝑍 → 𝑖 ..𝑧 Math */
{0x1d468, 0x1d481, +26}, /* 26x 𝑨 ..𝒁 → 𝒂 ..𝒛 Math */
{0x1d4ae, 0x1d4b5, +26}, /* 8x 𝒮 ..𝒵 → 𝓈 ..𝓏 Math */
{0x1d4d0, 0x1d4e9, +26}, /* 26x 𝓐 ..𝓩 → 𝓪 ..𝔃 Math */
{0x1d50d, 0x1d514, +26}, /* 8x 𝔍 ..𝔔 → 𝔧 ..𝔮 Math */
{0x1d56c, 0x1d585, +26}, /* 26x 𝕬 ..𝖅 → 𝖆 ..𝖟 Math */
{0x1d5a0, 0x1d5b9, +26}, /* 26x 𝖠 ..𝖹 → 𝖺 ..𝗓 Math */
{0x1d5d4, 0x1d5ed, +26}, /* 26x 𝗔 ..𝗭 → 𝗮 ..𝘇 Math */
{0x1d608, 0x1d621, +26}, /* 26x 𝘈 ..𝘡 → 𝘢 ..𝘻 Math */
{0x1d63c, 0x1d655, -442}, /* 26x 𝘼 ..𝙕 → 𝒂 ..𝒛 Math */
{0x1d670, 0x1d689, +26}, /* 26x 𝙰 ..𝚉 → 𝚊 ..𝚣 Math */
{0x1d6a8, 0x1d6b8, +26}, /* 17x 𝚨 ..𝚸 → 𝛂 ..𝛒 Math */
{0x1d6e2, 0x1d6f2, +26}, /* 17x 𝛢 ..𝛲 → 𝛼 ..𝜌 Math */
{0x1d71c, 0x1d72c, +26}, /* 17x 𝜜 ..𝜬 → 𝜶 ..𝝆 Math */
{0x1d756, 0x1d766, +26}, /* 17x 𝝖 ..𝝦 → 𝝰 ..𝞀 Math */
{0x1d790, 0x1d7a0, -90}, /* 17x 𝞐 ..𝞠 → 𝜶 ..𝝆 Math */
};
l = 0;
r = n = sizeof(kAstralLower) / sizeof(kAstralLower[0]);
while (l < r) {
m = (l + r) >> 1;
if (kAstralLower[m].b < c) {
l = m + 1;
} else {
r = m;
}
}
if (l < n && kAstralLower[l].a <= c && c <= kAstralLower[l].b) {
return c + kAstralLower[l].d;
} else {
return c;
}
}
}
unsigned bestlineUppercase(unsigned c) {
int m, l, r, n;
if (c < 0200) {
if ('a' <= c && c <= 'z') {
return c - 32;
} else {
return c;
}
} else if (c <= 0xffff) {
if ((0x0101 <= c && c <= 0x0177) || /* 60x ā..ŵ → Ā..ā Watin-A */
(0x01df <= c && c <= 0x01ef) || /* 9x ǟ..ǯ → Ǟ..Ǯ Watin-B */
(0x01f8 <= c && c <= 0x021e) || /* 20x ǹ..ȟ → Ǹ..Ȟ Watin-B */
(0x0222 <= c && c <= 0x0232) || /* 9x ȣ..ȳ → Ȣ..Ȳ Watin-B */
(0x1e01 <= c && c <= 0x1eff)) { /*256x ḁ..ỿ → Ḁ..Ỿ Watin-C */
if (c == 0x0131) return c + 232;
if (c == 0x1e9e) return c;
return c - (c & 1);
} else if (0x01d0 <= c && c <= 0x01dc) {
return c - (~c & 1); /* 7x ǐ..ǜ → Ǐ..Ǜ Watin-B */
} else if (0xab70 <= c && c <= 0xabbf) {
return c - 38864; /* 80x ꭰ ..ꮿ → Ꭰ ..Ꮿ Cherokee Supplement */
} else {
static const struct {
unsigned short a;
unsigned short b;
short d;
} kUpper[] = {
{0x00b5, 0x00b5, +743}, /* 1x µ ..µ → Μ ..Μ Watin */
{0x00e0, 0x00f6, -32}, /* 23x à ..ö → À ..Ö Watin */
{0x00f8, 0x00fe, -32}, /* 7x ø ..þ → Ø ..Þ Watin */
{0x00ff, 0x00ff, +121}, /* 1x ÿ ..ÿ → Ÿ ..Ÿ Watin */
{0x017a, 0x017a, -1}, /* 1x ź ..ź → Ź ..Ź Watin-A */
{0x017c, 0x017c, -1}, /* 1x ż ..ż → Ż ..Ż Watin-A */
{0x017e, 0x017e, -1}, /* 1x ž ..ž → Ž ..Ž Watin-A */
{0x017f, 0x017f, -300}, /* 1x ſ ..ſ → S ..S Watin-A */
{0x0180, 0x0180, +195}, /* 1x ƀ ..ƀ → Ƀ ..Ƀ Watin-B */
{0x0183, 0x0183, -1}, /* 1x ƃ ..ƃ → Ƃ ..Ƃ Watin-B */
{0x0185, 0x0185, -1}, /* 1x ƅ ..ƅ → Ƅ ..Ƅ Watin-B */
{0x0188, 0x0188, -1}, /* 1x ƈ ..ƈ → Ƈ ..Ƈ Watin-B */
{0x018c, 0x018c, -1}, /* 1x ƌ ..ƌ → Ƌ ..Ƌ Watin-B */
{0x0192, 0x0192, -1}, /* 1x ƒ ..ƒ → Ƒ ..Ƒ Watin-B */
{0x0195, 0x0195, +97}, /* 1x ƕ ..ƕ → Ƕ ..Ƕ Watin-B */
{0x0199, 0x0199, -1}, /* 1x ƙ ..ƙ → Ƙ ..Ƙ Watin-B */
{0x019a, 0x019a, +163}, /* 1x ƚ ..ƚ → Ƚ ..Ƚ Watin-B */
{0x019e, 0x019e, +130}, /* 1x ƞ ..ƞ → Ƞ ..Ƞ Watin-B */
{0x01a1, 0x01a1, -1}, /* 1x ơ ..ơ → Ơ ..Ơ Watin-B */
{0x01a3, 0x01a3, -1}, /* 1x ƣ ..ƣ → Ƣ ..Ƣ Watin-B */
{0x01a5, 0x01a5, -1}, /* 1x ƥ ..ƥ → Ƥ ..Ƥ Watin-B */
{0x01a8, 0x01a8, -1}, /* 1x ƨ ..ƨ → Ƨ ..Ƨ Watin-B */
{0x01ad, 0x01ad, -1}, /* 1x ƭ ..ƭ → Ƭ ..Ƭ Watin-B */
{0x01b0, 0x01b0, -1}, /* 1x ư ..ư → Ư ..Ư Watin-B */
{0x01b4, 0x01b4, -1}, /* 1x ƴ ..ƴ → Ƴ ..Ƴ Watin-B */
{0x01b6, 0x01b6, -1}, /* 1x ƶ ..ƶ → Ƶ ..Ƶ Watin-B */
{0x01b9, 0x01b9, -1}, /* 1x ƹ ..ƹ → Ƹ ..Ƹ Watin-B */
{0x01bd, 0x01bd, -1}, /* 1x ƽ ..ƽ → Ƽ ..Ƽ Watin-B */
{0x01bf, 0x01bf, +56}, /* 1x ƿ ..ƿ → Ƿ ..Ƿ Watin-B */
{0x01c5, 0x01c5, -1}, /* 1x Dž ..Dž → DŽ ..DŽ Watin-B */
{0x01c6, 0x01c6, -2}, /* 1x dž ..dž → DŽ ..DŽ Watin-B */
{0x01c8, 0x01c8, -1}, /* 1x Lj ..Lj → LJ ..LJ Watin-B */
{0x01c9, 0x01c9, -2}, /* 1x lj ..lj → LJ ..LJ Watin-B */
{0x01cb, 0x01cb, -1}, /* 1x Nj ..Nj → NJ ..NJ Watin-B */
{0x01cc, 0x01cc, -2}, /* 1x nj ..nj → NJ ..NJ Watin-B */
{0x01ce, 0x01ce, -1}, /* 1x ǎ ..ǎ → Ǎ ..Ǎ Watin-B */
{0x01dd, 0x01dd, -79}, /* 1x ǝ ..ǝ → Ǝ ..Ǝ Watin-B */
{0x01f2, 0x01f2, -1}, /* 1x Dz ..Dz → DZ ..DZ Watin-B */
{0x01f3, 0x01f3, -2}, /* 1x dz ..dz → DZ ..DZ Watin-B */
{0x01f5, 0x01f5, -1}, /* 1x ǵ ..ǵ → Ǵ ..Ǵ Watin-B */
{0x023c, 0x023c, -1}, /* 1x ȼ ..ȼ → Ȼ ..Ȼ Watin-B */
{0x023f, 0x0240,+10815}, /* 2x ȿ ..ɀ → Ȿ ..Ɀ Watin-B */
{0x0242, 0x0242, -1}, /* 1x ɂ ..ɂ → Ɂ ..Ɂ Watin-B */
{0x0247, 0x0247, -1}, /* 1x ɇ ..ɇ → Ɇ ..Ɇ Watin-B */
{0x0249, 0x0249, -1}, /* 1x ɉ ..ɉ → Ɉ ..Ɉ Watin-B */
{0x024b, 0x024b, -1}, /* 1x ɋ ..ɋ → Ɋ ..Ɋ Watin-B */
{0x024d, 0x024d, -1}, /* 1x ɍ ..ɍ → Ɍ ..Ɍ Watin-B */
{0x024f, 0x024f, -1}, /* 1x ɏ ..ɏ → Ɏ ..Ɏ Watin-B */
{0x037b, 0x037d, +130}, /* 3x ͻ ..ͽ → Ͻ ..Ͽ Greek */
{0x03ac, 0x03ac, -38}, /* 1x ά ..ά → Ά ..Ά Greek */
{0x03ad, 0x03af, -37}, /* 3x έ ..ί → Έ ..Ί Greek */
{0x03b1, 0x03c1, -32}, /* 17x α ..ρ → Α ..Ρ Greek */
{0x03c2, 0x03c2, -31}, /* 1x ς ..ς → Σ ..Σ Greek */
{0x03c3, 0x03cb, -32}, /* 9x σ ..ϋ → Σ ..Ϋ Greek */
{0x03cc, 0x03cc, -64}, /* 1x ό ..ό → Ό ..Ό Greek */
{0x03cd, 0x03ce, -63}, /* 2x ύ ..ώ → Ύ ..Ώ Greek */
{0x03d0, 0x03d0, -62}, /* 1x ϐ ..ϐ → Β ..Β Greek */
{0x03d1, 0x03d1, -57}, /* 1x ϑ ..ϑ → Θ ..Θ Greek */
{0x03d5, 0x03d5, -47}, /* 1x ϕ ..ϕ → Φ ..Φ Greek */
{0x03d6, 0x03d6, -54}, /* 1x ϖ ..ϖ → Π ..Π Greek */
{0x03dd, 0x03dd, -1}, /* 1x ϝ ..ϝ → Ϝ ..Ϝ Greek */
{0x03f0, 0x03f0, -86}, /* 1x ϰ ..ϰ → Κ ..Κ Greek */
{0x03f1, 0x03f1, -80}, /* 1x ϱ ..ϱ → Ρ ..Ρ Greek */
{0x03f5, 0x03f5, -96}, /* 1x ϵ ..ϵ → Ε ..Ε Greek */
{0x0430, 0x044f, -32}, /* 32x а ..я → А ..Я Cyrillic */
{0x0450, 0x045f, -80}, /* 16x ѐ ..џ → Ѐ ..Џ Cyrillic */
{0x0461, 0x0461, -1}, /* 1x ѡ ..ѡ → Ѡ ..Ѡ Cyrillic */
{0x0463, 0x0463, -1}, /* 1x ѣ ..ѣ → Ѣ ..Ѣ Cyrillic */
{0x0465, 0x0465, -1}, /* 1x ѥ ..ѥ → Ѥ ..Ѥ Cyrillic */
{0x0473, 0x0473, -1}, /* 1x ѳ ..ѳ → Ѳ ..Ѳ Cyrillic */
{0x0491, 0x0491, -1}, /* 1x ґ ..ґ → Ґ ..Ґ Cyrillic */
{0x0499, 0x0499, -1}, /* 1x ҙ ..ҙ → Ҙ ..Ҙ Cyrillic */
{0x049b, 0x049b, -1}, /* 1x қ ..қ → Қ ..Қ Cyrillic */
{0x0561, 0x0586, -48}, /* 38x ա ..ֆ → Ա ..Ֆ Armenian */
{0x10d0, 0x10fa, +3008}, /* 43x ა ..ჺ → Ა ..Ჺ Georgian */
{0x10fd, 0x10ff, +3008}, /* 3x ჽ ..ჿ → Ჽ ..Ჿ Georgian */
{0x13f8, 0x13fd, -8}, /* 6x ᏸ ..ᏽ → Ᏸ ..Ᏽ Cherokee */
{0x214e, 0x214e, -28}, /* 1x ⅎ ..ⅎ → Ⅎ ..Ⅎ Letterlike */
{0x2170, 0x217f, -16}, /* 16x ⅰ ..ⅿ → Ⅰ ..Ⅿ Numbery */
{0x2184, 0x2184, -1}, /* 1x ↄ ..ↄ → Ↄ ..Ↄ Numbery */
{0x24d0, 0x24e9, -26}, /* 26x ⓐ ..ⓩ → Ⓐ ..Ⓩ Enclosed */
{0x2c30, 0x2c5e, -48}, /* 47x ⰰ ..ⱞ → Ⰰ ..Ⱞ Glagolitic */
{0x2d00, 0x2d25, -7264}, /* 38x ⴀ ..ⴥ → Ⴀ ..Ⴥ Georgian2 */
{0x2d27, 0x2d27, -7264}, /* 1x ⴧ ..ⴧ → Ⴧ ..Ⴧ Georgian2 */
{0x2d2d, 0x2d2d, -7264}, /* 1x ⴭ ..ⴭ → Ⴭ ..Ⴭ Georgian2 */
{0xff41, 0xff5a, -32}, /* 26x ａ..ｚ → Ａ..Ｚ Dubs */
};
l = 0;
r = n = sizeof(kUpper) / sizeof(kUpper[0]);
while (l < r) {
m = (l + r) >> 1;
if (kUpper[m].b < c) {
l = m + 1;
} else {
r = m;
}
}
if (l < n && kUpper[l].a <= c && c <= kUpper[l].b) {
return c + kUpper[l].d;
} else {
return c;
}
}
} else {
static const struct {
unsigned a;
unsigned b;
short d;
} kAstralUpper[] = {
{0x10428, 0x1044f, -40}, /* 40x 𐐨..𐑏 → 𐐀..𐐧 Deseret */
{0x104d8, 0x104fb, -40}, /* 36x 𐓘..𐓻 → 𐒰..𐓓 Osage */
{0x1d41a, 0x1d433, -26}, /* 26x 𝐚..𝐳 → 𝐀..𝐙 Math */
{0x1d456, 0x1d467, -26}, /* 18x 𝑖..𝑧 → 𝐼..𝑍 Math */
{0x1d482, 0x1d49b, -26}, /* 26x 𝒂..𝒛 → 𝑨..𝒁 Math */
{0x1d4c8, 0x1d4cf, -26}, /* 8x 𝓈..𝓏 → 𝒮..𝒵 Math */
{0x1d4ea, 0x1d503, -26}, /* 26x 𝓪..𝔃 → 𝓐..𝓩 Math */
{0x1d527, 0x1d52e, -26}, /* 8x 𝔧..𝔮 → 𝔍..𝔔 Math */
{0x1d586, 0x1d59f, -26}, /* 26x 𝖆..𝖟 → 𝕬..𝖅 Math */
{0x1d5ba, 0x1d5d3, -26}, /* 26x 𝖺..𝗓 → 𝖠..𝖹 Math */
{0x1d5ee, 0x1d607, -26}, /* 26x 𝗮..𝘇 → 𝗔..𝗭 Math */
{0x1d622, 0x1d63b, -26}, /* 26x 𝘢..𝘻 → 𝘈..𝘡 Math */
{0x1d68a, 0x1d6a3, +442}, /* 26x 𝒂..𝒛 → 𝘼..𝙕 Math */
{0x1d6c2, 0x1d6d2, -26}, /* 26x 𝚊..𝚣 → 𝙰..𝚉 Math */
{0x1d6fc, 0x1d70c, -26}, /* 17x 𝛂..𝛒 → 𝚨..𝚸 Math */
{0x1d736, 0x1d746, -26}, /* 17x 𝛼..𝜌 → 𝛢..𝛲 Math */
{0x1d770, 0x1d780, -26}, /* 17x 𝜶..𝝆 → 𝜜..𝜬 Math */
{0x1d770, 0x1d756, -26}, /* 17x 𝝰..𝞀 → 𝝖..𝝦 Math */
{0x1d736, 0x1d790, -90}, /* 17x 𝜶..𝝆 → 𝞐..𝞠 Math */
};
l = 0;
r = n = sizeof(kAstralUpper) / sizeof(kAstralUpper[0]);
while (l < r) {
m = (l + r) >> 1;
if (kAstralUpper[m].b < c) {
l = m + 1;
} else {
r = m;
}
}
if (l < n && kAstralUpper[l].a <= c && c <= kAstralUpper[l].b) {
return c + kAstralUpper[l].d;
} else {
return c;
}
}
}
char bestlineNotSeparator(unsigned c) {
return !bestlineIsSeparator(c);
}
static unsigned GetMirror(const unsigned short A[][2], size_t n, unsigned c) {
int l, m, r;
l = 0;
r = n - 1;
while (l <= r) {
m = (l + r) >> 1;
if (A[m][0] < c) {
l = m + 1;
} else if (A[m][0] > c) {
r = m - 1;
} else {
return A[m][1];
}
}
return 0;
}
unsigned bestlineMirrorLeft(unsigned c) {
static const unsigned short kMirrorRight[][2] = {
{L')', L'('}, {L']', L'['}, {L'}', L'{'}, {L'⁆', L'⁅'},
{L'⁾', L'⁽'}, {L'₎', L'₍'}, {L'⌉', L'⌈'}, {L'⌋', L'⌊'},
{L'〉', L'〈'}, {L'❩', L'❨'}, {L'❫', L'❪'}, {L'❭', L'❬'},
{L'❯', L'❮'}, {L'❱', L'❰'}, {L'❳', L'❲'}, {L'❵', L'❴'},
{L'⟆', L'⟅'}, {L'⟧', L'⟦'}, {L'⟩', L'⟨'}, {L'⟫', L'⟪'},
{L'⟭', L'⟬'}, {L'⟯', L'⟮'}, {L'⦄', L'⦃'}, {L'⦆', L'⦅'},
{L'⦈', L'⦇'}, {L'⦊', L'⦉'}, {L'⦌', L'⦋'}, {L'⦎', L'⦏'},
{L'⦐', L'⦍'}, {L'⦒', L'⦑'}, {L'⦔', L'⦓'}, {L'⦘', L'⦗'},
{L'⧙', L'⧘'}, {L'⧛', L'⧚'}, {L'⧽', L'⧼'}, {L'﹚', L'﹙'},
{L'﹜', L'﹛'}, {L'﹞', L'﹝'}, {L'）', L'（'}, {L'］', L'［'},
{L'｝', L'｛'}, {L'｣', L'｢'},
};
return GetMirror(kMirrorRight,
sizeof(kMirrorRight) / sizeof(kMirrorRight[0]),
c);
}
unsigned bestlineMirrorRight(unsigned c) {
static const unsigned short kMirrorLeft[][2] = {
{L'(', L')'}, {L'[', L']'}, {L'{', L'}'}, {L'⁅', L'⁆'},
{L'⁽', L'⁾'}, {L'₍', L'₎'}, {L'⌈', L'⌉'}, {L'⌊', L'⌋'},
{L'〈', L'〉'}, {L'❨', L'❩'}, {L'❪', L'❫'}, {L'❬', L'❭'},
{L'❮', L'❯'}, {L'❰', L'❱'}, {L'❲', L'❳'}, {L'❴', L'❵'},
{L'⟅', L'⟆'}, {L'⟦', L'⟧'}, {L'⟨', L'⟩'}, {L'⟪', L'⟫'},
{L'⟬', L'⟭'}, {L'⟮', L'⟯'}, {L'⦃', L'⦄'}, {L'⦅', L'⦆'},
{L'⦇', L'⦈'}, {L'⦉', L'⦊'}, {L'⦋', L'⦌'}, {L'⦍', L'⦐'},
{L'⦏', L'⦎'}, {L'⦑', L'⦒'}, {L'⦓', L'⦔'}, {L'⦗', L'⦘'},
{L'⧘', L'⧙'}, {L'⧚', L'⧛'}, {L'⧼', L'⧽'}, {L'﹙', L'﹚'},
{L'﹛', L'﹜'}, {L'﹝', L'﹞'}, {L'（', L'）'}, {L'［', L'］'},
{L'｛', L'｝'}, {L'｢', L'｣'},
};
return GetMirror(kMirrorLeft,
sizeof(kMirrorLeft) / sizeof(kMirrorLeft[0]),
c);
}
char bestlineIsXeparator(unsigned c) {
return (bestlineIsSeparator(c) &&
!bestlineMirrorLeft(c) &&
!bestlineMirrorRight(c));
}
static unsigned Capitalize(unsigned c) {
if (!iscapital) {
c = bestlineUppercase(c);
iscapital = 1;
}
return c;
}
static inline int Bsr(unsigned long long x) {
#if defined(__GNUC__) && !defined(__STRICT_ANSI__)
int b;
b = __builtin_clzll(x);
b ^= sizeof(unsigned long long) * CHAR_BIT - 1;
return b;
#else
static const char kDebruijn[64] = {
0, 47, 1, 56, 48, 27, 2, 60, 57, 49, 41, 37, 28, 16, 3, 61,
54, 58, 35, 52, 50, 42, 21, 44, 38, 32, 29, 23, 17, 11, 4, 62,
46, 55, 26, 59, 40, 36, 15, 53, 34, 51, 20, 43, 31, 22, 10, 45,
25, 39, 14, 33, 19, 30, 9, 24, 13, 18, 8, 12, 7, 6, 5, 63,
};
x |= x >> 1;
x |= x >> 2;
x |= x >> 4;
x |= x >> 8;
x |= x >> 16;
x |= x >> 32;
return kDebruijn[(x * 0x03f79d71b4cb0a89) >> 58];
#endif
}
static struct rune DecodeUtf8(int c) {
struct rune r;
if (c < 252) {
r.n = Bsr(255 & ~c);
r.c = c & (((1 << r.n) - 1) | 3);
r.n = 6 - r.n;
} else {
r.c = c & 3;
r.n = 5;
}
return r;
}
static unsigned long long EncodeUtf8(unsigned c) {
static const unsigned short kTpEnc[32 - 7] = {
1|0300<<8, 1|0300<<8, 1|0300<<8, 1|0300<<8, 2|0340<<8,
2|0340<<8, 2|0340<<8, 2|0340<<8, 2|0340<<8, 3|0360<<8,
3|0360<<8, 3|0360<<8, 3|0360<<8, 3|0360<<8, 4|0370<<8,
4|0370<<8, 4|0370<<8, 4|0370<<8, 4|0370<<8, 5|0374<<8,
5|0374<<8, 5|0374<<8, 5|0374<<8, 5|0374<<8, 5|0374<<8,
};
int e, n;
unsigned long long w;
if (c < 0200) return c;
e = kTpEnc[Bsr(c) - 7];
n = e & 0xff;
w = 0;
do {
w |= 0200 | (c & 077);
w <<= 8;
c >>= 6;
} while (--n);
return c | w | e >> 8;
}
static struct rune GetUtf8(const char *p, size_t n) {
struct rune r;
if ((r.n = r.c = 0) < n && (r.c = p[r.n++] & 255) >= 0300) {
r.c = DecodeUtf8(r.c).c;
while (r.n < n && (p[r.n] & 0300) == 0200) {
r.c = r.c << 6 | (p[r.n++] & 077);
}
}
return r;
}
static char *FormatUnsigned(char *p, unsigned x) {
char t;
size_t i, a, b;
i = 0;
do {
p[i++] = x % 10 + '0';
x = x / 10;
} while (x > 0);
p[i] = '\0';
if (i) {
for (a = 0, b = i - 1; a < b; ++a, --b) {
t = p[a];
p[a] = p[b];
p[b] = t;
}
}
return p + i;
}
static void abInit(struct abuf *a) {
a->len = 0;
a->cap = 16;
a->b = (char *)malloc(a->cap);
a->b[0] = 0;
}
static char abGrow(struct abuf *a, int need) {
int cap;
char *b;
cap = a->cap;
do cap += cap / 2;
while (cap < need);
if (!(b = (char *)realloc(a->b, cap * sizeof(*a->b)))) return 0;
a->cap = cap;
a->b = b;
return 1;
}
static void abAppendw(struct abuf *a, unsigned long long w) {
char *p;
if (a->len + 8 > a->cap && !abGrow(a, a->len + 8)) return;
p = a->b + a->len;
p[0] = (0x00000000000000FF & w) >> 000;
p[1] = (0x000000000000FF00 & w) >> 010;
p[2] = (0x0000000000FF0000 & w) >> 020;
p[3] = (0x00000000FF000000 & w) >> 030;
p[4] = (0x000000FF00000000 & w) >> 040;
p[5] = (0x0000FF0000000000 & w) >> 050;
p[6] = (0x00FF000000000000 & w) >> 060;
p[7] = (0xFF00000000000000 & w) >> 070;
a->len += w ? (Bsr(w) >> 3) + 1 : 1;
}
static void abAppend(struct abuf *a, const char *s, int len) {
if (a->len + len + 1 > a->cap && !abGrow(a, a->len + len + 1)) return;
memcpy(a->b + a->len, s, len);
a->b[a->len + len] = 0;
a->len += len;
}
static void abAppends(struct abuf *a, const char *s) {
abAppend(a, s, strlen(s));
}
static void abAppendu(struct abuf *a, unsigned u) {
char b[11];
abAppend(a, b, FormatUnsigned(b, u) - b);
}
static void abFree(struct abuf *a) {
free(a->b);
a->b = 0;
}
static size_t GetFdSize(int fd) {
struct stat st;
st.st_size = 0;
fstat(fd, &st);
return st.st_size;
}
static char IsCharDev(int fd) {
struct stat st;
st.st_mode = 0;
fstat(fd, &st);
return (st.st_mode & S_IFMT) == S_IFCHR;
}
static int WaitUntilReady(int fd, int events) {
struct pollfd p[1];
p[0].fd = fd;
p[0].events = events;
return poll(p, 1, -1);
}
static char HasPendingInput(int fd) {
struct pollfd p[1];
p[0].fd = fd;
p[0].events = POLLIN;
return poll(p, 1, 0) == 1;
}
static char *GetLineBlock(FILE *f) {
ssize_t rc;
char *p = 0;
size_t n, c = 0;
if ((rc = getdelim(&p, &c, '\n', f)) != EOF) {
for (n = rc; n; --n) {
if (p[n - 1] == '\r' || p[n - 1] == '\n') {
p[n - 1] = 0;
} else {
break;
}
}
return p;
} else {
free(p);
return 0;
}
}
long bestlineReadCharacter(int fd, char *p, unsigned long n) {
int e;
size_t i;
ssize_t rc;
struct rune r;
unsigned char c;
enum { kAscii, kUtf8, kEsc, kCsi1, kCsi2, kSs, kNf, kStr, kStr2, kDone } t;
i = 0;
r.c = 0;
r.n = 0;
e = errno;
t = kAscii;
if (n) p[0] = 0;
do {
for (;;) {
if (gotint) {
errno = EINTR;
return -1;
}
if (n) {
rc = read(fd,&c,1);
} else {
rc = read(fd,0,0);
}
if (rc == -1 && errno == EINTR) {
if (!i) {
return -1;
}
} else if (rc == -1 && (errno == EAGAIN || errno == EWOULDBLOCK)) {
if (WaitUntilReady(fd, POLLIN) == -1) {
if (rc == -1 && errno == EINTR) {
if (!i) {
return -1;
}
} else {
return -1;
}
}
} else if (rc == -1) {
return -1;
} else if (!rc) {
if (!i) {
errno = e;
return 0;
} else {
errno = EILSEQ;
return -1;
}
} else {
break;
}
}
if (i + 1 < n) {
p[i] = c;
p[i+1] = 0;
} else if (i < n) {
p[i] = 0;
}
++i;
switch (t) {
Whoopsie:
if (n) p[0] = c;
t = kAscii;
i = 1;
/* fallthrough */
case kAscii:
if (c < 0200) {
if (c == 033) {
t = kEsc;
} else {
t = kDone;
}
} else if (c >= 0300) {
t = kUtf8;
r = DecodeUtf8(c);
} else {
/* ignore overlong sequences */
}
break;
case kUtf8:
if ((c & 0300) == 0200) {
r.c <<= 6;
r.c |= c & 077;
if (!--r.n) {
switch (r.c) {
case 033:
t = kEsc; /* parsed but not canonicalized */
break;
case 0x9b:
t = kCsi1; /* unusual but legal */
break;
case 0x8e: /* SS2 (Single Shift Two) */
case 0x8f: /* SS3 (Single Shift Three) */
t = kSs;
break;
case 0x90: /* DCS (Device Control String) */
case 0x98: /* SOS (Start of String) */
case 0x9d: /* OSC (Operating System Command) */
case 0x9e: /* PM (Privacy Message) */
case 0x9f: /* APC (Application Program Command) */
t = kStr;
break;
default:
t = kDone;
break;
}
}
} else {
goto Whoopsie; /* ignore underlong sequences if not eof */
}
break;
case kEsc:
if (0x20 <= c && c <= 0x2f) { /* Nf */
/*
* Almost no one uses ANSI Nf sequences
* They overlaps with alt+graphic keystrokes
* We care more about being able to type alt-/
*/
if (c == ' ' || c == '#') {
t = kNf;
} else {
t = kDone;
}
} else if (0x30 <= c && c <= 0x3f) { /* Fp */
t = kDone;
} else if (0x20 <= c && c <= 0x5F) { /* Fe */
switch (c) {
case '[':
t = kCsi1;
break;
case 'N': /* SS2 (Single Shift Two) */
case 'O': /* SS3 (Single Shift Three) */
t = kSs;
break;
case 'P': /* DCS (Device Control String) */
case 'X': /* SOS (Start of String) */
case ']': /* OSC (Operating System Command) */
case '^': /* PM (Privacy Message) */
case '_': /* APC (Application Program Command) */
t = kStr;
break;
default:
t = kDone;
break;
}
} else if (0x60 <= c && c <= 0x7e) { /* Fs */
t = kDone;
} else if (c == 033) {
if (i < 3) {
/* alt chording */
} else {
t = kDone; /* esc mashing */
i = 1;
}
} else {
t = kDone;
}
break;
case kSs:
t = kDone;
break;
case kNf:
if (0x30 <= c && c <= 0x7e) {
t = kDone;
} else if (!(0x20 <= c && c <= 0x2f)) {
goto Whoopsie;
}
break;
case kCsi1:
if (0x20 <= c && c <= 0x2f) {
t = kCsi2;
} else if (c == '[' && ((i == 3) ||
(i == 4 && p[1] == 033))) {
/* linux function keys */
} else if (0x40 <= c && c <= 0x7e) {
t = kDone;
} else if (!(0x30 <= c && c <= 0x3f)) {
goto Whoopsie;
}
break;
case kCsi2:
if (0x40 <= c && c <= 0x7e) {
t = kDone;
} else if (!(0x20 <= c && c <= 0x2f)) {
goto Whoopsie;
}
break;
case kStr:
switch (c) {
case '\a':
t = kDone;
break;
case 0033: /* ESC */
case 0302: /* C1 (UTF-8) */
t = kStr2;
break;
default:
break;
}
break;
case kStr2:
switch (c) {
case '\a':
case '\\': /* ST (ASCII) */
case 0234: /* ST (UTF-8) */
t = kDone;
break;
default:
t = kStr;
break;
}
break;
default:
assert(0);
}
} while (t != kDone);
errno = e;
return i;
}
static char *GetLineChar(int fin, int fout) {
size_t got;
ssize_t rc;
char seq[16];
struct abuf a;
struct sigaction sa[3];
abInit(&a);
gotint = 0;
sigemptyset(&sa->sa_mask);
sa->sa_flags = 0;
sa->sa_handler = bestlineOnInt;
sigaction(SIGINT,sa,sa+1);
sigaction(SIGQUIT,sa,sa+2);
for (;;) {
if (gotint) {
rc = -1;
break;
}
if ((rc = bestlineReadCharacter(fin, seq, sizeof(seq))) == -1) {
if (errno == EAGAIN || errno == EWOULDBLOCK) {
if (WaitUntilReady(fin, POLLIN) > 0) {
continue;
}
}
if (errno == EINTR) {
continue;
} else {
break;
}
}
if (!(got = rc)) {
if (a.len) {
break;
} else {
rc = -1;
break;
}
}
if (seq[0] == '\r') {
if (HasPendingInput(fin)) {
if ((rc = bestlineReadCharacter(fin, seq + 1, sizeof(seq) - 1)) > 0) {
if (seq[0] == '\n') {
break;
}
} else {
rc = -1;
break;
}
} else {
write(fout, "\n", 1);
break;
}
} else if (seq[0] == Ctrl('D')) {
break;
} else if (seq[0] == '\n') {
break;
} else if (seq[0] == '\b') {
while (a.len && (a.b[a.len - 1] & 0300) == 0200) --a.len;
if (a.len) --a.len;
}
if (!IsControl(seq[0])) {
abAppend(&a, seq, got);
}
}
sigaction(SIGQUIT,sa+2,0);
sigaction(SIGINT,sa+1,0);
if (gotint) {
abFree(&a);
raise(gotint);
errno = EINTR;
rc = -1;
}
if (rc != -1) {
return a.b;
} else {
abFree(&a);
return 0;
}
}
static char *GetLine(FILE *in, FILE *out) {
if (!IsCharDev(fileno(in))) {
return GetLineBlock(in);
} else {
return GetLineChar(fileno(in), fileno(out));
}
}
static char *Copy(char *d, const char *s, size_t n) {
memcpy(d, s, n);
return d + n;
}
static int CompareStrings(const char *a, const char *b) {
size_t i;
int x, y, c;
for (i = 0;; ++i) {
x = bestlineLowercase(a[i] & 255);
y = bestlineLowercase(b[i] & 255);
if ((c = x - y) || !x) {
return c;
}
}
}
static const char *FindSubstringReverse(const char *p, size_t n,
const char *q, size_t m) {
size_t i;
if (m <= n) {
n -= m;
do {
for (i = 0; i < m; ++i) {
if (p[n + i] != q[i]) {
break;
}
}
if (i == m) {
return p + n;
}
} while (n--);
}
return 0;
}
static int ParseUnsigned(const char *s, void *e) {
int c, x;
for (x = 0; (c = *s++);) {
if ('0' <= c && c <= '9') {
x = Min(c - '0' + x * 10, 32767);
} else {
break;
}
}
if (e) *(const char **)e = s;
return x;
}
/**
* Returns UNICODE CJK Monospace Width of string.
*
* Control codes and ANSI sequences have a width of zero. We only parse
* a limited subset of ANSI here since we don't store ANSI codes in the
* linenoiseState::buf, but we do encourage CSI color codes in prompts.
*/
static size_t GetMonospaceWidth(const char *p, size_t n, char *out_haswides) {
int c, d;
size_t i, w;
struct rune r;
char haswides;
enum { kAscii, kUtf8, kEsc, kCsi1, kCsi2 } t;
for (haswides = r.c = r.n = w = i = 0, t = kAscii; i < n; ++i) {
c = p[i] & 255;
switch (t) {
Whoopsie:
t = kAscii;
/* fallthrough */
case kAscii:
if (c < 0200) {
if (c == 033) {
t = kEsc;
} else {
++w;
}
} else if (c >= 0300) {
t = kUtf8;
r = DecodeUtf8(c);
}
break;
case kUtf8:
if ((c & 0300) == 0200) {
r.c <<= 6;
r.c |= c & 077;
if (!--r.n) {
d = GetMonospaceCharacterWidth(r.c);
d = Max(0, d);
w += d;
haswides |= d > 1;
t = kAscii;
break;
}
} else {
goto Whoopsie;
}
break;
case kEsc:
if (c == '[') {
t = kCsi1;
} else {
t = kAscii;
}
break;
case kCsi1:
if (0x20 <= c && c <= 0x2f) {
t = kCsi2;
} else if (0x40 <= c && c <= 0x7e) {
t = kAscii;
} else if (!(0x30 <= c && c <= 0x3f)) {
goto Whoopsie;
}
break;
case kCsi2:
if (0x40 <= c && c <= 0x7e) {
t = kAscii;
} else if (!(0x20 <= c && c <= 0x2f)) {
goto Whoopsie;
}
break;
default:
assert(0);
}
}
if (out_haswides) {
*out_haswides = haswides;
}
return w;
}
static int bestlineIsUnsupportedTerm(void) {
size_t i;
char *term;
static char once, res;
if (!once) {
if ((term = getenv("TERM"))) {
for (i = 0; i < sizeof(kUnsupported) / sizeof(*kUnsupported); i++) {
if (!CompareStrings(term,kUnsupported[i])) {
res = 1;
break;
}
}
}
once = 1;
}
return res;
}
static int enableRawMode(int fd) {
struct termios raw;
struct sigaction sa;
if (tcgetattr(fd,&orig_termios) != -1) {
raw = orig_termios;
raw.c_iflag &= ~(BRKINT | ICRNL | INPCK | ISTRIP | IXON);
raw.c_lflag &= ~(ECHO | ICANON | IEXTEN | ISIG);
raw.c_oflag &= ~OPOST;
raw.c_iflag |= IUTF8;
raw.c_cflag |= CS8;
raw.c_cc[VMIN] = 1;
raw.c_cc[VTIME] = 0;
if (tcsetattr(fd,TCSANOW,&raw) != -1) {
sa.sa_flags = 0;
sa.sa_handler = bestlineOnCont;
sigemptyset(&sa.sa_mask);
sigaction(SIGCONT,&sa,&orig_cont);
sa.sa_handler = bestlineOnWinch;
sigaction(SIGWINCH,&sa,&orig_winch);
rawmode = fd;
gotwinch = 0;
gotcont = 0;
return 0;
}
}
errno = ENOTTY;
return -1;
}
static void bestlineUnpause(int fd) {
if (ispaused) {
tcflow(fd, TCOON);
ispaused = 0;
}
}
void bestlineDisableRawMode(void) {
if (rawmode != -1) {
bestlineUnpause(rawmode);
sigaction(SIGCONT,&orig_cont,0);
sigaction(SIGWINCH,&orig_winch,0);
tcsetattr(rawmode,TCSANOW,&orig_termios);
rawmode = -1;
}
}
static int bestlineWrite(int fd, const void *p, size_t n) {
ssize_t rc;
size_t wrote;
do {
for (;;) {
if (gotint) {
errno = EINTR;
return -1;
}
if (ispaused) {
return 0;
}
rc = write(fd, p, n);
if (rc == -1 && errno == EINTR) {
continue;
} else if (rc == -1 && (errno == EAGAIN || errno == EWOULDBLOCK)) {
if (WaitUntilReady(fd, POLLOUT) == -1) {
if (errno == EINTR) {
continue;
} else {
return -1;
}
}
} else {
break;
}
}
if (rc != -1) {
wrote = rc;
n -= wrote;
p = (char *)p + wrote;
} else {
return -1;
}
} while (n);
return 0;
}
static int bestlineWriteStr(int fd, const char *p) {
return bestlineWrite(fd, p, strlen(p));
}
static ssize_t bestlineRead(int fd, char *buf, size_t size,
struct bestlineState *l) {
size_t got;
ssize_t rc;
int refreshme;
do {
refreshme = 0;
if (gotint) {
errno = EINTR;
return -1;
}
if (gotcont && rawmode != -1) {
enableRawMode(rawmode);
if (l) refreshme = 1;
}
if (gotwinch && l) {
refreshme = 1;
}
if (refreshme) bestlineRefreshLine(l);
rc = bestlineReadCharacter(fd, buf, size);
} while (rc == -1 && errno == EINTR);
if (rc != -1) {
got = rc;
if (got > 0 && l) {
memcpy(l->seq[1], l->seq[0], sizeof(l->seq[0]));
memset(l->seq[0], 0, sizeof(l->seq[0]));
memcpy(l->seq[0], buf, Min(Min(size, got), sizeof(l->seq[0]) - 1));
}
}
return rc;
}
/**
* Returns number of columns in current terminal.
*
* 1. Checks COLUMNS environment variable (set by Emacs)
* 2. Tries asking termios (works for pseudoteletypewriters)
* 3. Falls back to inband signalling (works w/ pipe or serial)
* 4. Otherwise we conservatively assume 80 columns
*
* @param ws should be initialized by caller to zero before first call
* @param ifd is input file descriptor
* @param ofd is output file descriptor
* @return window size
*/
static struct winsize GetTerminalSize(struct winsize ws, int ifd, int ofd) {
int x;
ssize_t n;
char *p, *s, b[16];
ioctl(ofd, TIOCGWINSZ, &ws);
if ((!ws.ws_row &&
(s = getenv("ROWS")) &&
(x = ParseUnsigned(s, 0)))) {
ws.ws_row = x;
}
if ((!ws.ws_col &&
(s = getenv("COLUMNS")) &&
(x = ParseUnsigned(s, 0)))) {
ws.ws_col = x;
}
if (((!ws.ws_col || !ws.ws_row) &&
bestlineRead(ifd,0,0,0) != -1 &&
bestlineWriteStr(ofd,
"\0337" /* save position */
"\033[9979;9979H" /* move cursor to bottom right corner */
"\033[6n" /* report position */
"\0338") != -1 && /* restore position */
(n = bestlineRead(ifd,b,sizeof(b),0)) != -1 &&
n && b[0] == 033 && b[1] == '[' && b[n - 1] == 'R')) {
p = b+2;
if ((x = ParseUnsigned(p,&p))) ws.ws_row = x;
if (*p++ == ';' && (x = ParseUnsigned(p,0))) ws.ws_col = x;
}
if (!ws.ws_col) ws.ws_col = 80;
if (!ws.ws_row) ws.ws_row = 24;
return ws;
}
/* Clear the screen. Used to handle ctrl+l */
void bestlineClearScreen(int fd) {
bestlineWriteStr(fd,
"\033[H" /* move cursor to top left corner */
"\033[2J"); /* erase display */
}
static void bestlineBeep(void) {
/* THE TERMINAL BELL IS DEAD - HISTORY HAS KILLED IT */
}
static char bestlineGrow(struct bestlineState *ls, size_t n) {
char *p;
size_t m;
m = ls->buflen;
if (m >= n) return 1;
do m += m >> 1;
while (m < n);
if (!(p = (char *)realloc(ls->buf, m * sizeof(*ls->buf)))) return 0;
ls->buf = p;
ls->buflen = m;
return 1;
}
/* This is an helper function for bestlineEdit() and is called when the
* user types the <tab> key in order to complete the string currently in the
* input.
*
* The state of the editing is encapsulated into the pointed bestlineState
* structure as described in the structure definition. */
static ssize_t bestlineCompleteLine(struct bestlineState *ls, char *seq, int size) {
ssize_t nread;
size_t i, n, stop;
bestlineCompletions lc;
struct bestlineState saved;
nread=0;
memset(&lc,0,sizeof(lc));
completionCallback(ls->buf,&lc);
if (!lc.len) {
bestlineBeep();
} else {
i = 0;
stop = 0;
while (!stop) {
/* Show completion or original buffer */
if (i < lc.len) {
saved = *ls;
ls->len = ls->pos = strlen(lc.cvec[i]);
ls->buf = lc.cvec[i];
bestlineRefreshLine(ls);
ls->len = saved.len;
ls->pos = saved.pos;
ls->buf = saved.buf;
} else {
bestlineRefreshLine(ls);
}
if ((nread = bestlineRead(ls->ifd,seq,size,ls)) <= 0) {
bestlineFreeCompletions(&lc);
return -1;
}
switch (seq[0]) {
case '\t':
i = (i+1) % (lc.len+1);
if (i == lc.len) {
bestlineBeep();
}
break;
default:
if (i < lc.len) {
n = strlen(lc.cvec[i]);
if (bestlineGrow(ls, n + 1)) {
memcpy(ls->buf, lc.cvec[i], n + 1);
ls->len = ls->pos = n;
}
}
stop = 1;
break;
}
}
}
bestlineFreeCompletions(&lc);
return nread;
}
static void bestlineEditHistoryGoto(struct bestlineState *l, unsigned i) {
size_t n;
if (historylen <= 1) return;
i = Max(Min(i,historylen-1),0);
free(history[historylen - 1 - l->hindex]);
history[historylen - 1 - l->hindex] = strdup(l->buf);
l->hindex = i;
n = strlen(history[historylen - 1 - l->hindex]);
bestlineGrow(l, n + 1);
n = Min(n, l->buflen - 1);
memcpy(l->buf, history[historylen - 1 - l->hindex], n);
l->buf[n] = 0;
l->len = l->pos = n;
bestlineRefreshLine(l);
}
static void bestlineEditHistoryMove(struct bestlineState *l, int dx) {
bestlineEditHistoryGoto(l,l->hindex+dx);
}
static char *bestlineMakeSearchPrompt(struct abuf *ab, int fail, const char *s, int n) {
ab->len=0;
abAppendw(ab,'(');
if (fail) abAppends(ab,"failed ");
abAppends(ab,"reverse-i-search `\033[4m");
abAppend(ab,s,n);
abAppends(ab,"\033[24m");
abAppends(ab,s+n);
abAppendw(ab,Read32le("') "));
return ab->b;
}
static int bestlineSearch(struct bestlineState *l, char *seq, int size) {
char *p;
char isstale;
struct abuf ab;
struct abuf prompt;
unsigned i, j, k, matlen;
const char *oldprompt, *q;
int rc, fail, added, oldpos, oldindex;
if (historylen <= 1) return 0;
abInit(&ab);
abInit(&prompt);
oldpos = l->pos;
oldprompt = l->prompt;
oldindex = l->hindex;
for (fail=matlen=0;;) {
l->prompt = bestlineMakeSearchPrompt(&prompt,fail,ab.b,matlen);
bestlineRefreshLine(l);
fail = 1;
added = 0;
j = l->pos;
i = l->hindex;
rc = bestlineRead(l->ifd,seq,size,l);
if (rc > 0) {
if (seq[0] == Ctrl('?') || seq[0] == Ctrl('H')) {
if (ab.len) {
--ab.len;
matlen = Min(matlen, ab.len);
}
} else if (seq[0] == Ctrl('R')) {
if (j) {
--j;
} else if (i + 1 < historylen) {
++i;
j = strlen(history[historylen - 1 - i]);
}
} else if (seq[0] == Ctrl('G')) {
bestlineEditHistoryGoto(l,oldindex);
l->pos = oldpos;
rc = 0;
break;
} else if (IsControl(seq[0])) { /* only sees canonical c0 */
break;
} else {
abAppend(&ab,seq,rc);
added = rc;
}
} else {
break;
}
isstale = 0;
while (i < historylen) {
p = history[historylen - 1 - i];
k = strlen(p);
if (!isstale) {
j = Min(k, j + ab.len);
} else {
isstale = 0;
j = k;
}
if ((q = FindSubstringReverse(p, j, ab.b, ab.len))) {
bestlineEditHistoryGoto(l,i);
l->pos = q - p;
fail = 0;
if (added) {
matlen += added;
added = 0;
}
break;
} else {
isstale = 1;
++i;
}
}
}
l->prompt = oldprompt;
bestlineRefreshLine(l);
abFree(&prompt);
abFree(&ab);
bestlineRefreshLine(l);
return rc;
}
static void bestlineRingFree(void) {
size_t i;
for (i = 0; i < BESTLINE_MAX_RING; ++i) {
if (ring.p[i]) {
free(ring.p[i]);
ring.p[i] = 0;
}
}
}
static void bestlineRingPush(const char *p, size_t n) {
char *q;
if (!n) return;
if (!(q = (char *)malloc(n + 1))) return;
ring.i = (ring.i + 1) % BESTLINE_MAX_RING;
free(ring.p[ring.i]);
ring.p[ring.i] = (char *)memcpy(q, p, n);
ring.p[ring.i][n] = 0;
}
static void bestlineRingRotate(void) {
size_t i;
for (i = 0; i < BESTLINE_MAX_RING; ++i) {
ring.i = (ring.i - 1) % BESTLINE_MAX_RING;
if (ring.p[ring.i]) break;
}
}
static char *bestlineRefreshHints(struct bestlineState *l) {
char *hint;
struct abuf ab;
const char *ansi1 = "\033[90m", *ansi2 = "\033[39m";
if (!hintsCallback) return 0;
if (!(hint = hintsCallback(l->buf, &ansi1, &ansi2))) return 0;
abInit(&ab);
if (ansi1) abAppends(&ab, ansi1);
abAppends(&ab, hint);
if (ansi2) abAppends(&ab, ansi2);
if (freeHintsCallback) freeHintsCallback(hint);
return ab.b;
}
static size_t Backward(struct bestlineState *l, size_t pos) {
if (pos) {
do --pos;
while (pos && (l->buf[pos] & 0300) == 0200);
}
return pos;
}
static int bestlineEditMirrorLeft(struct bestlineState *l, int res[2]) {
unsigned c, pos, left, right, depth, index;
if ((pos = Backward(l, l->pos))) {
right = GetUtf8(l->buf + pos, l->len - pos).c;
if ((left = bestlineMirrorLeft(right))) {
depth = 0;
index = pos;
do {
pos = Backward(l, pos);
c = GetUtf8(l->buf + pos, l->len - pos).c;
if (c == right) {
++depth;
} else if (c == left) {
if (depth) {
--depth;
} else {
res[0] = pos;
res[1] = index;
return 0;
}
}
} while (pos);
}
}
return -1;
}
static int bestlineEditMirrorRight(struct bestlineState *l, int res[2]) {
struct rune rune;
unsigned pos, left, right, depth, index;
pos = l->pos;
rune = GetUtf8(l->buf + pos, l->len - pos);
left = rune.c;
if ((right = bestlineMirrorRight(left))) {
depth = 0;
index = pos;
do {
pos += rune.n;
rune = GetUtf8(l->buf + pos, l->len - pos);
if (rune.c == left) {
++depth;
} else if (rune.c == right) {
if (depth) {
--depth;
} else {
res[0] = index;
res[1] = pos;
return 0;
}
}
} while (pos + rune.n < l->len);
}
return -1;
}
static int bestlineEditMirror(struct bestlineState *l, int res[2]) {
int rc;
rc = bestlineEditMirrorLeft(l, res);
if (rc == -1) rc = bestlineEditMirrorRight(l, res);
return rc;
}
static void bestlineRefreshLineImpl(struct bestlineState *l, int force) {
char *hint;
char flipit;
char hasflip;
char haswides;
struct abuf ab;
const char *buf;
struct rune rune;
struct winsize oldsize;
int fd, plen, rows, len, pos;
unsigned x, xn, yn, width, pwidth;
int i, t, cx, cy, tn, resized, flip[2];
/*
* synchonize the i/o state
*/
if (ispaused) {
if (force) {
bestlineUnpause(l->ofd);
} else {
return;
}
}
if (!force && HasPendingInput(l->ifd)) {
l->dirty = 1;
return;
}
oldsize = l->ws;
if ((resized = gotwinch) && rawmode != -1) {
gotwinch = 0;
l->ws = GetTerminalSize(l->ws, l->ifd, l->ofd);
}
hasflip = !l->final && !bestlineEditMirror(l, flip);
StartOver:
fd = l->ofd;
buf = l->buf;
pos = l->pos;
len = l->len;
xn = l->ws.ws_col;
yn = l->ws.ws_row;
plen = strlen(l->prompt);
pwidth = GetMonospaceWidth(l->prompt, plen, 0);
width = GetMonospaceWidth(buf, len, &haswides);
/*
* handle the case where the line is larger than the whole display
* gnu readline actually isn't able to deal with this situation!!!
* we kludge xn to address the edge case of wide chars on the edge
*/
for (tn = xn - haswides * 2;;) {
if (pwidth + width + 1 < tn * yn) break; /* we're fine */
if (!len || width < 2) break; /* we can't do anything */
if (pwidth + 2 > tn * yn) break; /* we can't do anything */
if (pos > len / 2) {
/* hide content on the left if we're editing on the right */
rune = GetUtf8(buf, len);
buf += rune.n;
len -= rune.n;
pos -= rune.n;
} else {
/* hide content on the right if we're editing on left */
t = len;
while (len && (buf[len - 1] & 0300) == 0200) --len;
if (len) --len;
rune = GetUtf8(buf + len, t - len);
}
if ((t = GetMonospaceCharacterWidth(rune.c)) > 0) {
width -= t;
}
}
pos = Max(0, Min(pos, len));
/*
* now generate the terminal codes to update the line
*
* since we support unlimited lines it's important that we don't
* clear the screen before we draw the screen. doing that causes
* flickering. the key with terminals is to overwrite cells, and
* then use \e[K and \e[J to clear everything else.
*
* we make the assumption that prompts and hints may contain ansi
* sequences, but the buffer does not.
*
* we need to handle the edge case where a wide character like 度
* might be at the edge of the window, when there's one cell left.
* so we can't use division based on string width to compute the
* coordinates and have to track it as we go.
*/
cy = -1;
cx = -1;
rows = 1;
abInit(&ab);
abAppendw(&ab, '\r'); /* start of line */
if (l->rows - l->oldpos - 1 > 0) {
abAppends(&ab, "\033[");
abAppendu(&ab, l->rows - l->oldpos - 1);
abAppendw(&ab, 'A'); /* cursor up clamped */
}
abAppends(&ab, l->prompt);
x = pwidth;
for (i = 0; i < len; i += rune.n) {
rune = GetUtf8(buf + i, len - i);
if (x && x + rune.n > xn) {
if (cy >= 0) ++cy;
if (x < xn) {
abAppends(&ab, "\033[K"); /* clear line forward */
}
abAppends(&ab, "\r" /* start of line */
"\n"); /* cursor down unclamped */
++rows;
x = 0;
}
if (i == pos) {
cy = 0;
cx = x;
}
if (maskmode) {
abAppendw(&ab, '*');
} else {
flipit = hasflip && (i == flip[0] || i == flip[1]);
if (flipit) abAppends(&ab, "\033[1m");
abAppendw(&ab, EncodeUtf8(rune.c));
if (flipit) abAppends(&ab, "\033[22m");
}
t = GetMonospaceCharacterWidth(rune.c);
t = Max(0, t);
x += t;
}
if (!l->final && (hint = bestlineRefreshHints(l))) {
if (GetMonospaceWidth(hint, strlen(hint), 0) < xn - x) {
if (cx < 0) {
cx = x;
}
abAppends(&ab, hint);
}
free(hint);
}
abAppendw(&ab, Read32le("\033[J")); /* erase display forwards */
/*
* if we are at the very end of the screen with our prompt, we need
* to emit a newline and move the prompt to the first column.
*/
if (pos && pos == len && x >= xn) {
abAppendw(&ab, Read32le("\n\r\0"));
++rows;
}
/*
* move cursor to right position
*/
if (cy > 0) {
abAppends(&ab, "\033[");
abAppendu(&ab, cy);
abAppendw(&ab, 'A'); /* cursor up */
}
if (cx > 0) {
abAppendw(&ab, Read32le("\r\033["));
abAppendu(&ab, cx);
abAppendw(&ab, 'C'); /* cursor right */
} else if (!cx) {
abAppendw(&ab, '\r'); /* start */
}
/*
* now get ready to progress state
* we use a mostly correct kludge when the tty resizes
*/
l->rows = rows;
if (resized && oldsize.ws_col > l->ws.ws_col) {
resized = 0;
abFree(&ab);
goto StartOver;
}
l->dirty = 0;
l->oldpos = Max(0, cy);
/*
* send codes to terminal
*/
bestlineWrite(fd, ab.b, ab.len);
abFree(&ab);
}
static void bestlineRefreshLine(struct bestlineState *l) {
bestlineRefreshLineImpl(l, 0);
}
static void bestlineRefreshLineForce(struct bestlineState *l) {
bestlineRefreshLineImpl(l, 1);
}
static void bestlineEditInsert(struct bestlineState *l,
const char *p, size_t n) {
if (!bestlineGrow(l, l->len + n + 1)) return;
memmove(l->buf + l->pos + n, l->buf + l->pos, l->len - l->pos);
memcpy(l->buf + l->pos, p, n);
l->pos += n;
l->len += n;
l->buf[l->len] = 0;
bestlineRefreshLine(l);
}
static void bestlineEditHome(struct bestlineState *l) {
l->pos = 0;
bestlineRefreshLine(l);
}
static void bestlineEditEnd(struct bestlineState *l) {
l->pos = l->len;
bestlineRefreshLine(l);
}
static void bestlineEditUp(struct bestlineState *l) {
bestlineEditHistoryMove(l,BESTLINE_HISTORY_PREV);
}
static void bestlineEditDown(struct bestlineState *l) {
bestlineEditHistoryMove(l,BESTLINE_HISTORY_NEXT);
}
static void bestlineEditBof(struct bestlineState *l) {
bestlineEditHistoryMove(l,BESTLINE_HISTORY_FIRST);
}
static void bestlineEditEof(struct bestlineState *l) {
bestlineEditHistoryMove(l,BESTLINE_HISTORY_LAST);
}
static void bestlineEditRefresh(struct bestlineState *l) {
bestlineClearScreen(l->ofd);
bestlineRefreshLine(l);
}
static size_t Forward(struct bestlineState *l, size_t pos) {
return pos + GetUtf8(l->buf + pos, l->len - pos).n;
}
static size_t Backwards(struct bestlineState *l, size_t pos, char pred(unsigned)) {
size_t i;
struct rune r;
while (pos) {
i = Backward(l, pos);
r = GetUtf8(l->buf + i, l->len - i);
if (pred(r.c)) {
pos = i;
} else {
break;
}
}
return pos;
}
static size_t Forwards(struct bestlineState *l, size_t pos, char pred(unsigned)) {
struct rune r;
while (pos < l->len) {
r = GetUtf8(l->buf + pos, l->len - pos);
if (pred(r.c)) {
pos += r.n;
} else {
break;
}
}
return pos;
}
static size_t ForwardWord(struct bestlineState *l, size_t pos) {
pos = Forwards(l, pos, bestlineIsSeparator);
pos = Forwards(l, pos, bestlineNotSeparator);
return pos;
}
static size_t BackwardWord(struct bestlineState *l, size_t pos) {
pos = Backwards(l, pos, bestlineIsSeparator);
pos = Backwards(l, pos, bestlineNotSeparator);
return pos;
}
static size_t EscapeWord(struct bestlineState *l, size_t i) {
size_t j;
struct rune r;
for (; i && i < l->len; i += r.n) {
if (i < l->len) {
r = GetUtf8(l->buf + i, l->len - i);
if (bestlineIsSeparator(r.c)) break;
}
if ((j = i)) {
do --j;
while (j && (l->buf[j] & 0300) == 0200);
r = GetUtf8(l->buf + j, l->len - j);
if (bestlineIsSeparator(r.c)) break;
}
}
return i;
}
static void bestlineEditLeft(struct bestlineState *l) {
l->pos = Backward(l, l->pos);
bestlineRefreshLine(l);
}
static void bestlineEditRight(struct bestlineState *l) {
if (l->pos == l->len) return;
do l->pos++;
while (l->pos < l->len && (l->buf[l->pos] & 0300) == 0200);
bestlineRefreshLine(l);
}
static void bestlineEditLeftWord(struct bestlineState *l) {
l->pos = BackwardWord(l, l->pos);
bestlineRefreshLine(l);
}
static void bestlineEditRightWord(struct bestlineState *l) {
l->pos = ForwardWord(l, l->pos);
bestlineRefreshLine(l);
}
static void bestlineEditLeftExpr(struct bestlineState *l) {
int mark[2];
l->pos = Backwards(l, l->pos, bestlineIsXeparator);
if (!bestlineEditMirrorLeft(l, mark)) {
l->pos = mark[0];
} else {
l->pos = Backwards(l, l->pos, bestlineNotSeparator);
}
bestlineRefreshLine(l);
}
static void bestlineEditRightExpr(struct bestlineState *l) {
int mark[2];
l->pos = Forwards(l, l->pos, bestlineIsXeparator);
if (!bestlineEditMirrorRight(l, mark)) {
l->pos = Forward(l, mark[1]);
} else {
l->pos = Forwards(l, l->pos, bestlineNotSeparator);
}
bestlineRefreshLine(l);
}
static void bestlineEditDelete(struct bestlineState *l) {
size_t i;
if (l->pos == l->len) return;
i = Forward(l, l->pos);
memmove(l->buf+l->pos, l->buf+i, l->len-i+1);
l->len -= i - l->pos;
bestlineRefreshLine(l);
}
static void bestlineEditRubout(struct bestlineState *l) {
size_t i;
if (!l->pos) return;
i = Backward(l, l->pos);
memmove(l->buf+i, l->buf+l->pos, l->len-l->pos+1);
l->len -= l->pos - i;
l->pos = i;
bestlineRefreshLine(l);
}
static void bestlineEditDeleteWord(struct bestlineState *l) {
size_t i;
if (l->pos == l->len) return;
i = ForwardWord(l, l->pos);
bestlineRingPush(l->buf + l->pos, i - l->pos);
memmove(l->buf + l->pos, l->buf + i, l->len - i + 1);
l->len -= i - l->pos;
bestlineRefreshLine(l);
}
static void bestlineEditRuboutWord(struct bestlineState *l) {
size_t i;
if (!l->pos) return;
i = BackwardWord(l, l->pos);
bestlineRingPush(l->buf + i, l->pos - i);
memmove(l->buf + i, l->buf + l->pos, l->len - l->pos + 1);
l->len -= l->pos - i;
l->pos = i;
bestlineRefreshLine(l);
}
static void bestlineEditXlatWord(struct bestlineState *l, unsigned xlat(unsigned)) {
unsigned c;
size_t i, j;
struct rune r;
struct abuf ab;
abInit(&ab);
i = Forwards(l, l->pos, bestlineIsSeparator);
for (j = i; j < l->len; j += r.n) {
r = GetUtf8(l->buf + j, l->len - j);
if (bestlineIsSeparator(r.c)) break;
if ((c = xlat(r.c)) != r.c) {
abAppendw(&ab, EncodeUtf8(c));
} else { /* avoid canonicalization */
abAppend(&ab, l->buf + j, r.n);
}
}
if (ab.len && bestlineGrow(l, i + ab.len + l->len - j + 1)) {
l->pos = i + ab.len;
abAppend(&ab, l->buf + j, l->len - j);
l->len = i + ab.len;
memcpy(l->buf + i, ab.b, ab.len + 1);
bestlineRefreshLine(l);
}
abFree(&ab);
}
static void bestlineEditLowercaseWord(struct bestlineState *l) {
bestlineEditXlatWord(l, bestlineLowercase);
}
static void bestlineEditUppercaseWord(struct bestlineState *l) {
bestlineEditXlatWord(l, bestlineUppercase);
}
static void bestlineEditCapitalizeWord(struct bestlineState *l) {
iscapital = 0;
bestlineEditXlatWord(l, Capitalize);
}
static void bestlineEditKillLeft(struct bestlineState *l) {
size_t diff, old_pos;
bestlineRingPush(l->buf, l->pos);
old_pos = l->pos;
l->pos = 0;
diff = old_pos - l->pos;
memmove(l->buf+l->pos,l->buf+old_pos,l->len-old_pos+1);
l->len -= diff;
bestlineRefreshLine(l);
}
static void bestlineEditKillRight(struct bestlineState *l) {
bestlineRingPush(l->buf + l->pos, l->len - l->pos);
l->buf[l->pos] = '\0';
l->len = l->pos;
bestlineRefreshLine(l);
}
static void bestlineEditYank(struct bestlineState *l) {
char *p;
size_t n;
if (!ring.p[ring.i]) return;
n = strlen(ring.p[ring.i]);
if (!bestlineGrow(l, l->len + n + 1)) return;
if (!(p = (char *)malloc(l->len - l->pos + 1))) return;
memcpy(p, l->buf + l->pos, l->len - l->pos + 1);
memcpy(l->buf + l->pos, ring.p[ring.i], n);
memcpy(l->buf + l->pos + n, p, l->len - l->pos + 1);
free(p);
l->yi = l->pos;
l->yj = l->pos + n;
l->pos += n;
l->len += n;
bestlineRefreshLine(l);
}
static void bestlineEditRotate(struct bestlineState *l) {
if ((l->seq[1][0] == Ctrl('Y') ||
(l->seq[1][0] == 033 && l->seq[1][1] == 'y'))) {
if (l->yi < l->len && l->yj <= l->len) {
memmove(l->buf + l->yi, l->buf + l->yj, l->len - l->yj + 1);
l->len -= l->yj - l->yi;
l->pos -= l->yj - l->yi;
}
bestlineRingRotate();
bestlineEditYank(l);
}
}
static void bestlineEditTranspose(struct bestlineState *l) {
char *q, *p;
size_t a, b, c;
b = l->pos;
if (b == l->len) --b;
a = Backward(l, b);
c = Forward(l, b);
if (!(a < b && b < c)) return;
p = q = (char *)malloc(c - a);
p = Copy(p, l->buf + b, c - b);
p = Copy(p, l->buf + a, b - a);
assert((size_t)(p - q) == c - a);
memcpy(l->buf + a, q, p - q);
l->pos = c;
free(q);
bestlineRefreshLine(l);
}
static void bestlineEditTransposeWords(struct bestlineState *l) {
char *q, *p;
size_t i, pi, xi, xj, yi, yj;
i = l->pos;
if (i == l->len) {
i = Backwards(l, i, bestlineIsSeparator);
i = Backwards(l, i, bestlineNotSeparator);
}
pi = EscapeWord(l, i);
xj = Backwards(l, pi, bestlineIsSeparator);
xi = Backwards(l, xj, bestlineNotSeparator);
yi = Forwards(l, pi, bestlineIsSeparator);
yj = Forwards(l, yi, bestlineNotSeparator);
if (!(xi < xj && xj < yi && yi < yj)) return;
p = q = (char *)malloc(yj - xi);
p = Copy(p, l->buf + yi, yj - yi);
p = Copy(p, l->buf + xj, yi - xj);
p = Copy(p, l->buf + xi, xj - xi);
assert((size_t)(p - q) == yj - xi);
memcpy(l->buf + xi, q, p - q);
l->pos = yj;
free(q);
bestlineRefreshLine(l);
}
static void bestlineEditSqueeze(struct bestlineState *l) {
size_t i, j;
i = Backwards(l, l->pos, bestlineIsSeparator);
j = Forwards(l, l->pos, bestlineIsSeparator);
if (!(i < j)) return;
memmove(l->buf + i, l->buf + j, l->len - j + 1);
l->len -= j - i;
l->pos = i;
bestlineRefreshLine(l);
}
static void bestlineEditMark(struct bestlineState *l) {
l->mark = l->pos;
}
static void bestlineEditGoto(struct bestlineState *l) {
if (l->mark > l->len) return;
l->pos = Min(l->mark, l->len);
bestlineRefreshLine(l);
}
static size_t bestlineEscape(char *d, const char *s, size_t n) {
char *p;
size_t i;
unsigned c, w, l;
for (p = d, l = i = 0; i < n; ++i) {
switch ((c = s[i] & 255)) {
Case('\a', w = Read16le("\\a"));
Case('\b', w = Read16le("\\b"));
Case('\t', w = Read16le("\\t"));
Case('\n', w = Read16le("\\n"));
Case('\v', w = Read16le("\\v"));
Case('\f', w = Read16le("\\f"));
Case('\r', w = Read16le("\\r"));
Case('"', w = Read16le("\\\""));
Case('\'', w = Read16le("\\\'"));
Case('\\', w = Read16le("\\\\"));
default:
if (c <= 0x1F || c == 0x7F ||
(c == '?' && l == '?')) {
w = Read16le("\\x");
w |= "0123456789abcdef"[(c & 0xF0) >> 4] << 020;
w |= "0123456789abcdef"[(c & 0x0F) >> 0] << 030;
} else {
w = c;
}
break;
}
p[0] = (w & 0x000000ff) >> 000;
p[1] = (w & 0x0000ff00) >> 010;
p[2] = (w & 0x00ff0000) >> 020;
p[3] = (w & 0xff000000) >> 030;
p += (Bsr(w) >> 3) + 1;
l = w;
}
return p - d;
}
static void bestlineEditInsertEscape(struct bestlineState *l) {
size_t m;
ssize_t n;
char seq[16];
char esc[sizeof(seq) * 4];
if ((n = bestlineRead(l->ifd, seq, sizeof(seq), l)) > 0) {
m = bestlineEscape(esc, seq, n);
bestlineEditInsert(l, esc, m);
}
}
static void bestlineEditInterrupt(void) {
gotint = SIGINT;
}
static void bestlineEditQuit(void) {
gotint = SIGQUIT;
}
static void bestlineEditSuspend(void) {
raise(SIGSTOP);
}
static void bestlineEditPause(struct bestlineState *l) {
tcflow(l->ofd, TCOOFF);
ispaused = 1;
}
static void bestlineEditCtrlq(struct bestlineState *l) {
if (ispaused) {
bestlineUnpause(l->ofd);
bestlineRefreshLineForce(l);
} else {
bestlineEditInsertEscape(l);
}
}
/**
* Moves last item inside current s-expression to outside, e.g.
*
* (a| b c)
* (a| b) c
*
* The cursor position changes only if a paren is moved before it:
*
* (a b c |)
* (a b) c |
*
* To accommodate non-LISP languages we connect unspaced outer symbols:
*
* f(a,| b, g())
* f(a,| b), g()
*
* Our standard keybinding is ALT-SHIFT-B.
*/
static void bestlineEditBarf(struct bestlineState *l) {
struct rune r;
unsigned long w;
size_t i, pos, depth = 0;
unsigned lhs, rhs, end, *stack = 0;
/* go as far right within current s-expr as possible */
for (pos = l->pos;; pos += r.n) {
if (pos == l->len) goto Finish;
r = GetUtf8(l->buf + pos, l->len - pos);
if (depth) {
if (r.c == stack[depth - 1]) {
--depth;
}
} else {
if ((rhs = bestlineMirrorRight(r.c))) {
stack = (unsigned *)realloc(stack, ++depth * sizeof(*stack));
stack[depth - 1] = rhs;
} else if (bestlineMirrorLeft(r.c)) {
end = pos;
break;
}
}
}
/* go back one item */
pos = Backwards(l, pos, bestlineIsXeparator);
for (;; pos = i) {
if (!pos) goto Finish;
i = Backward(l, pos);
r = GetUtf8(l->buf + i, l->len - i);
if (depth) {
if (r.c == stack[depth - 1]) {
--depth;
}
} else {
if ((lhs = bestlineMirrorLeft(r.c))) {
stack = (unsigned *)realloc(stack, ++depth * sizeof(*stack));
stack[depth - 1] = lhs;
} else if (bestlineIsSeparator(r.c)) {
break;
}
}
}
pos = Backwards(l, pos, bestlineIsXeparator);
/* now move the text */
r = GetUtf8(l->buf + end, l->len - end);
memmove(l->buf + pos + r.n, l->buf + pos, end - pos);
w = EncodeUtf8(r.c);
for (i = 0; i < r.n; ++i) {
l->buf[pos + i] = w;
w >>= 8;
}
if (l->pos > pos) {
l->pos += r.n;
}
bestlineRefreshLine(l);
Finish:
free(stack);
}
/**
* Moves first item outside current s-expression to inside, e.g.
*
* (a| b) c d
* (a| b c) d
*
* To accommodate non-LISP languages we connect unspaced outer symbols:
*
* f(a,| b), g()
* f(a,| b, g())
*
* Our standard keybinding is ALT-SHIFT-S.
*/
static void bestlineEditSlurp(struct bestlineState *l) {
char rp[6];
struct rune r;
size_t pos, depth = 0;
unsigned rhs, point = 0, start = 0, *stack = 0;
/* go to outside edge of current s-expr */
for (pos = l->pos; pos < l->len; pos += r.n) {
r = GetUtf8(l->buf + pos, l->len - pos);
if (depth) {
if (r.c == stack[depth - 1]) {
--depth;
}
} else {
if ((rhs = bestlineMirrorRight(r.c))) {
stack = (unsigned *)realloc(stack, ++depth * sizeof(*stack));
stack[depth - 1] = rhs;
} else if (bestlineMirrorLeft(r.c)) {
point = pos;
pos += r.n;
start = pos;
break;
}
}
}
/* go forward one item */
pos = Forwards(l, pos, bestlineIsXeparator);
for (; pos < l->len ; pos += r.n) {
r = GetUtf8(l->buf + pos, l->len - pos);
if (depth) {
if (r.c == stack[depth - 1]) {
--depth;
}
} else {
if ((rhs = bestlineMirrorRight(r.c))) {
stack = (unsigned *)realloc(stack, ++depth * sizeof(*stack));
stack[depth - 1] = rhs;
} else if (bestlineIsSeparator(r.c)) {
break;
}
}
}
/* now move the text */
memcpy(rp, l->buf + point, start - point);
memmove(l->buf + point, l->buf + start, pos - start);
memcpy(l->buf + pos - (start - point), rp, start - point);
bestlineRefreshLine(l);
free(stack);
}
static void bestlineEditRaise(struct bestlineState *l) {
(void)l;
}
/**
* Runs bestline engine.
*
* This function is the core of the line editing capability of bestline.
* It expects 'fd' to be already in "raw mode" so that every key pressed
* will be returned ASAP to read().
*
* The resulting string is put into 'buf' when the user type enter, or
* when ctrl+d is typed.
*
* Returns chomped character count in buf >=0 or -1 on eof / error
*/
static ssize_t bestlineEdit(int stdin_fd, int stdout_fd, const char *prompt,
char **obuf) {
ssize_t rc;
size_t nread;
struct rune rune;
char *p, seq[16];
unsigned long long w;
struct bestlineState l;
memset(&l,0,sizeof(l));
if (!(l.buf = (char *)malloc((l.buflen = 32)))) return -1;
l.buf[0] = 0;
l.ifd = stdin_fd;
l.ofd = stdout_fd;
l.prompt = prompt ? prompt : "";
l.ws = GetTerminalSize(l.ws,l.ifd,l.ofd);
bestlineHistoryAdd("");
bestlineWriteStr(l.ofd,l.prompt);
while (1) {
if (l.dirty) bestlineRefreshLineForce(&l);
rc = bestlineRead(l.ifd,seq,sizeof(seq),&l);
if (rc > 0) {
if (seq[0] == Ctrl('R')) {
rc = bestlineSearch(&l,seq,sizeof(seq));
if (!rc) continue;
} else if (seq[0] == '\t' && completionCallback) {
rc = bestlineCompleteLine(&l,seq,sizeof(seq));
if (!rc) continue;
}
}
if (rc > 0) {
nread = rc;
} else if (!rc && l.len) {
nread = 1;
seq[0] = '\r';
seq[1] = 0;
} else {
free(history[--historylen]);
history[historylen] = 0;
free(l.buf);
return -1;
}
switch (seq[0]) {
Case(Ctrl('P'), bestlineEditUp(&l));
Case(Ctrl('E'), bestlineEditEnd(&l));
Case(Ctrl('N'), bestlineEditDown(&l));
Case(Ctrl('A'), bestlineEditHome(&l));
Case(Ctrl('B'), bestlineEditLeft(&l));
Case(Ctrl('@'), bestlineEditMark(&l));
Case(Ctrl('Y'), bestlineEditYank(&l));
Case(Ctrl('Q'), bestlineEditCtrlq(&l));
Case(Ctrl('F'), bestlineEditRight(&l));
Case(Ctrl('\\'), bestlineEditQuit());
Case(Ctrl('S'), bestlineEditPause(&l));
Case(Ctrl('?'), bestlineEditRubout(&l));
Case(Ctrl('H'), bestlineEditRubout(&l));
Case(Ctrl('L'), bestlineEditRefresh(&l));
Case(Ctrl('Z'), bestlineEditSuspend());
Case(Ctrl('U'), bestlineEditKillLeft(&l));
Case(Ctrl('T'), bestlineEditTranspose(&l));
Case(Ctrl('K'), bestlineEditKillRight(&l));
Case(Ctrl('W'), bestlineEditRuboutWord(&l));
case Ctrl('C'):
if (bestlineRead(l.ifd,seq,sizeof(seq),&l) != 1) break;
switch (seq[0]) {
Case(Ctrl('C'), bestlineEditInterrupt());
Case(Ctrl('B'), bestlineEditBarf(&l));
Case(Ctrl('S'), bestlineEditSlurp(&l));
Case(Ctrl('R'), bestlineEditRaise(&l));
default:
break;
}
break;
case Ctrl('X'):
if (l.seq[1][0] == Ctrl('X')) {
bestlineEditGoto(&l);
}
break;
case Ctrl('D'):
if (l.len) {
bestlineEditDelete(&l);
} else {
free(history[--historylen]);
history[historylen] = 0;
free(l.buf);
return -1;
}
break;
case '\r':
l.final = 1;
free(history[--historylen]);
history[historylen] = 0;
bestlineEditEnd(&l);
bestlineRefreshLineForce(&l);
if ((p = (char *)realloc(l.buf, l.len + 1))) l.buf = p;
*obuf = l.buf;
return l.len;
case 033:
if (nread < 2) break;
switch (seq[1]) {
Case('<', bestlineEditBof(&l));
Case('>', bestlineEditEof(&l));
Case('B', bestlineEditBarf(&l));
Case('S', bestlineEditSlurp(&l));
Case('R', bestlineEditRaise(&l));
Case('y', bestlineEditRotate(&l));
Case('\\', bestlineEditSqueeze(&l));
Case('b', bestlineEditLeftWord(&l));
Case('f', bestlineEditRightWord(&l));
Case('h', bestlineEditRuboutWord(&l));
Case('d', bestlineEditDeleteWord(&l));
Case('l', bestlineEditLowercaseWord(&l));
Case('u', bestlineEditUppercaseWord(&l));
Case('c', bestlineEditCapitalizeWord(&l));
Case('t', bestlineEditTransposeWords(&l));
Case(Ctrl('B'), bestlineEditLeftExpr(&l));
Case(Ctrl('F'), bestlineEditRightExpr(&l));
Case(Ctrl('H'), bestlineEditRuboutWord(&l));
case '[':
if (nread < 3) break;
if (seq[2] >= '0' && seq[2] <= '9') {
if (nread < 4) break;
if (seq[3] == '~') {
switch (seq[2]) {
Case('1', bestlineEditHome(&l)); /* \e[1~ */
Case('3', bestlineEditDelete(&l)); /* \e[3~ */
Case('4', bestlineEditEnd(&l)); /* \e[4~ */
default:
break;
}
}
} else {
switch (seq[2]) {
Case('A', bestlineEditUp(&l));
Case('B', bestlineEditDown(&l));
Case('C', bestlineEditRight(&l));
Case('D', bestlineEditLeft(&l));
Case('H', bestlineEditHome(&l));
Case('F', bestlineEditEnd(&l));
default:
break;
}
}
break;
case 'O':
if (nread < 3) break;
switch (seq[2]) {
Case('A', bestlineEditUp(&l));
Case('B', bestlineEditDown(&l));
Case('C', bestlineEditRight(&l));
Case('D', bestlineEditLeft(&l));
Case('H', bestlineEditHome(&l));
Case('F', bestlineEditEnd(&l));
default:
break;
}
break;
case 033:
if (nread < 3) break;
switch (seq[2]) {
case '[':
if (nread < 4) break;
switch (seq[3]) {
Case('C', bestlineEditRightExpr(&l)); /* \e\e[C alt-right */
Case('D', bestlineEditLeftExpr(&l)); /* \e\e[D alt-left */
default:
break;
}
break;
case 'O':
if (nread < 4) break;
switch (seq[3]) {
Case('C', bestlineEditRightExpr(&l)); /* \e\eOC alt-right */
Case('D', bestlineEditLeftExpr(&l)); /* \e\eOD alt-left */
default:
break;
}
break;
default:
break;
}
break;
default:
break;
}
break;
default:
if (!IsControl(seq[0])) { /* only sees canonical c0 */
if (xlatCallback) {
rune = GetUtf8(seq,nread);
w = EncodeUtf8(xlatCallback(rune.c));
nread = 0;
do {
seq[nread++] = w;
} while ((w >>= 8));
}
bestlineEditInsert(&l,seq,nread);
}
break;
}
}
}
void bestlineFree(void *ptr) {
free(ptr);
}
void bestlineHistoryFree(void) {
size_t i;
for (i = 0; i < BESTLINE_MAX_HISTORY; i++) {
if (history[i]) {
free(history[i]);
history[i] = 0;
}
}
historylen = 0;
}
static void bestlineAtExit(void) {
bestlineDisableRawMode();
bestlineHistoryFree();
bestlineRingFree();
}
int bestlineHistoryAdd(const char *line) {
char *linecopy;
if (!BESTLINE_MAX_HISTORY) return 0;
if (historylen && !strcmp(history[historylen-1], line)) return 0;
if (!(linecopy = strdup(line))) return 0;
if (historylen == BESTLINE_MAX_HISTORY) {
free(history[0]);
memmove(history,history+1,sizeof(char*)*(BESTLINE_MAX_HISTORY-1));
historylen--;
}
history[historylen++] = linecopy;
return 1;
}
/**
* Saves line editing history to file.
*
* @return 0 on success, or -1 w/ errno
*/
int bestlineHistorySave(const char *filename) {
FILE *fp;
unsigned j;
mode_t old_umask;
old_umask = umask(S_IXUSR|S_IRWXG|S_IRWXO);
fp = fopen(filename,"w");
umask(old_umask);
if (!fp) return -1;
chmod(filename,S_IRUSR|S_IWUSR);
for (j = 0; j < historylen; j++) {
fputs(history[j],fp);
fputc('\n',fp);
}
fclose(fp);
return 0;
}
/**
* Loads history from the specified file.
*
* If the file doesn't exist, zero is returned and this will do nothing.
* If the file does exists and the operation succeeded zero is returned
* otherwise on error -1 is returned.
*
* @return 0 on success, or -1 w/ errno
*/
int bestlineHistoryLoad(const char *filename) {
char **h;
int rc, fd, err;
size_t i, j, k, n, t;
char *m, *e, *p, *q, *f, *s;
err = errno, rc = 0;
if (!BESTLINE_MAX_HISTORY) return 0;
if (!(h = (char**)calloc(2*BESTLINE_MAX_HISTORY,sizeof(char*)))) return -1;
if ((fd = open(filename,O_RDONLY)) != -1) {
if ((n = GetFdSize(fd))) {
if ((m = (char *)mmap(0,n,PROT_READ,MAP_SHARED,fd,0))!=MAP_FAILED) {
for (i = 0, e = (p = m) + n; p < e; p = f + 1) {
if (!(q = (char *)memchr(p, '\n', e - p))) q = e;
for (f = q; q > p; --q) {
if (q[-1] != '\n' && q[-1] != '\r') break;
}
if (q > p) {
h[i * 2 + 0] = p;
h[i * 2 + 1] = q;
i = (i + 1) % BESTLINE_MAX_HISTORY;
}
}
bestlineHistoryFree();
for (j = 0; j < BESTLINE_MAX_HISTORY; ++j) {
if (h[(k = (i + j) % BESTLINE_MAX_HISTORY) * 2]) {
if ((s = (char *)malloc((t=h[k*2+1]-h[k*2])+1))) {
memcpy(s,h[k*2],t),s[t]=0;
history[historylen++] = s;
}
}
}
munmap(m,n);
} else {
rc = -1;
}
}
close(fd);
} else if (errno == ENOENT) {
errno = err;
} else {
rc = -1;
}
free(h);
return rc;
}
/**
* Reads line interactively.
*
* This function can be used instead of bestline() in cases where we
* know for certain we're dealing with a terminal, which means we can
* avoid linking any stdio code.
*
* @return chomped allocated string of read line or null on eof/error
*/
char *bestlineRaw(const char *prompt, int infd, int outfd) {
char *buf;
ssize_t rc;
static char once;
struct sigaction sa[3];
if (!once) atexit(bestlineAtExit), once = 1;
if (enableRawMode(infd) == -1) return 0;
buf = 0;
gotint = 0;
sigemptyset(&sa->sa_mask);
sa->sa_flags = 0;
sa->sa_handler = bestlineOnInt;
sigaction(SIGINT,sa,sa+1);
sigaction(SIGQUIT,sa,sa+2);
rc = bestlineEdit(infd,outfd,prompt,&buf);
bestlineDisableRawMode();
sigaction(SIGQUIT,sa+2,0);
sigaction(SIGINT,sa+1,0);
if (gotint) {
free(buf);
buf = 0;
raise(gotint);
errno = EINTR;
rc = -1;
}
if (rc != -1) {
bestlineWriteStr(outfd,"\n");
return buf;
} else {
free(buf);
return 0;
}
}
/**
* Reads line intelligently.
*
* The high level function that is the main API of the bestline library.
* This function checks if the terminal has basic capabilities, just checking
* for a blacklist of inarticulate terminals, and later either calls the line
* editing function or uses dummy fgets() so that you will be able to type
* something even in the most desperate of the conditions.
*
* @param prompt is printed before asking for input if we have a term
* and this may be set to empty or null to disable and prompt may
* contain ansi escape sequences, color, utf8, etc.
* @return chomped allocated string of read line or null on eof/error
*/
char *bestline(const char *prompt) {
if (prompt && *prompt &&
(strchr(prompt, '\n') || strchr(prompt, '\t') ||
strchr(prompt + 1, '\r'))) {
errno = EINVAL;
return 0;
}
if ((!isatty(fileno(stdin)) ||
!isatty(fileno(stdout)))) {
if (prompt && *prompt && (IsCharDev(fileno(stdin)) &&
IsCharDev(fileno(stdout)))) {
fputs(prompt,stdout);
fflush(stdout);
}
return GetLine(stdin, stdout);
} else if (bestlineIsUnsupportedTerm()) {
if (prompt && *prompt) {
fputs(prompt,stdout);
fflush(stdout);
}
return GetLine(stdin, stdout);
} else {
fflush(stdout);
return bestlineRaw(prompt,fileno(stdin),fileno(stdout));
}
}
/**
* Reads line intelligently w/ history, e.g.
*
* // see ~/.foo_history
* main() {
* char *line;
* while ((line = bestlineWithHistory("IN> ", "foo"))) {
* printf("OUT> %s\n", line);
* free(line);
* }
* }
*
* @param prompt is printed before asking for input if we have a term
* and this may be set to empty or null to disable and prompt may
* contain ansi escape sequences, color, utf8, etc.
* @param prog is name of your app, used to generate history filename
* however if it contains a slash / dot then we'll assume prog is
* the history filename which as determined by the caller
* @return chomped allocated string of read line or null on eof/error
*/
char *bestlineWithHistory(const char *prompt, const char *prog) {
char *line;
struct abuf path;
const char *a, *b;
abInit(&path);
if (prog) {
if (strchr(prog, '/') || strchr(prog, '.')) {
abAppends(&path, prog);
} else {
b = "";
if (!(a = getenv("HOME"))) {
if (!(a = getenv("HOMEDRIVE")) ||
!(b = getenv("HOMEPATH"))) {
a = "";
}
}
if (*a) {
abAppends(&path, a);
abAppends(&path, b);
abAppendw(&path, '/');
}
abAppendw(&path, '.');
abAppends(&path, prog);
abAppends(&path, "_history");
}
}
if (path.len) {
bestlineHistoryLoad(path.b);
}
line = bestline(prompt);
if (path.len && line && *line) {
/* history here is inefficient but helpful when the user has multiple
* repls open at the same time, so history propagates between them */
bestlineHistoryLoad(path.b);
bestlineHistoryAdd(line);
bestlineHistorySave(path.b);
}
abFree(&path);
return line;
}
/**
* Registers tab completion callback.
*/
void bestlineSetCompletionCallback(bestlineCompletionCallback *fn) {
completionCallback = fn;
}
/**
* Registers hints callback.
*
* Register a hits function to be called to show hits to the user at the
* right of the prompt.
*/
void bestlineSetHintsCallback(bestlineHintsCallback *fn) {
hintsCallback = fn;
}
/**
* Sets free hints callback.
*
* This registers a function to free the hints returned by the hints
* callback registered with bestlineSetHintsCallback().
*/
void bestlineSetFreeHintsCallback(bestlineFreeHintsCallback *fn) {
freeHintsCallback = fn;
}
/**
* Sets character translation callback.
*/
void bestlineSetXlatCallback(bestlineXlatCallback *fn) {
xlatCallback = fn;
}
/**
* Adds completion.
*
* This function is used by the callback function registered by the user
* in order to add completion options given the input string when the
* user typed <tab>. See the example.c source code for a very easy to
* understand example.
*/
void bestlineAddCompletion(bestlineCompletions *lc, const char *str) {
size_t len;
char *copy, **cvec;
if ((copy = (char *)malloc((len = strlen(str))+1))) {
memcpy(copy,str,len+1);
if ((cvec = (char **)realloc(lc->cvec,(lc->len+1)*sizeof(*lc->cvec)))) {
lc->cvec = cvec;
lc->cvec[lc->len++] = copy;
} else {
free(copy);
}
}
}
/**
* Frees list of completion option populated by bestlineAddCompletion().
*/
void bestlineFreeCompletions(bestlineCompletions *lc) {
size_t i;
for (i = 0; i < lc->len; i++)
free(lc->cvec[i]);
if (lc->cvec)
free(lc->cvec);
}
/**
* Enables "mask mode".
*
* When it is enabled, instead of the input that the user is typing, the
* terminal will just display a corresponding number of asterisks, like
* "****". This is useful for passwords and other secrets that should
* not be displayed.
*
* @see bestlineMaskModeDisable()
*/
void bestlineMaskModeEnable(void) {
maskmode = 1;
}
/**
* Disables "mask mode".
*/
void bestlineMaskModeDisable(void) {
maskmode = 0;
}
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