commit ec1b1338332e718eb9d7a88d90810a02cdf8af72
Author: Ed van Bruggen <ed@edryd.org>
Date: Mon, 19 Feb 2018 00:30:04 -0800
Initial commit
Diffstat:
| .gitignore | | | 21 | +++++++++++++++++++++ |
| LICENSE | | | 19 | +++++++++++++++++++ |
| Makefile | | | 73 | +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
| README.md | | | 34 | ++++++++++++++++++++++++++++++++++ |
| config.def.h | | | 2 | ++ |
| config.mk | | | 18 | ++++++++++++++++++ |
| extern/arg.h | | | 63 | +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
| extern/linenoise.c | | | 1199 | +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
| extern/linenoise.h | | | 73 | +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
| tisp.1 | | | 35 | +++++++++++++++++++++++++++++++++++ |
| tisp.c | | | 546 | +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
| util.c | | | 75 | +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
| util.h | | | 14 | ++++++++++++++ |
13 files changed, 2172 insertions(+), 0 deletions(-)
diff --git a/.gitignore b/.gitignore
@@ -0,0 +1,21 @@
+# swap files
+*~
+*.swp
+*.swo
+\#*\#
+
+# compiled files
+tisp
+*.exe
+*.out
+*.app
+*.i*86
+*.x86_64
+*.o
+*.obj
+*.so
+*.so.*
+
+# misc
+tags
+config.h
diff --git a/LICENSE b/LICENSE
@@ -0,0 +1,19 @@
+zlib License
+
+Copyright (c) 2017-2018 Ed van Bruggen
+
+This software is provided 'as-is', without any express or implied
+warranty. In no event will the authors be held liable for any damages
+arising from the use of this software.
+
+Permission is granted to anyone to use this software for any purpose,
+including commercial applications, and to alter it and redistribute it
+freely, subject to the following restrictions:
+
+1. The origin of this software must not be misrepresented; you must not
+ claim that you wrote the original software. If you use this software
+ in a product, an acknowledgment in the product documentation would be
+ appreciated but is not required.
+2. Altered source versions must be plainly marked as such, and must not be
+ misrepresented as being the original software.
+3. This notice may not be removed or altered from any source distribution.
diff --git a/Makefile b/Makefile
@@ -0,0 +1,73 @@
+# tisp - tiny lisp
+# See LICENSE file for copyright and license details.
+
+include config.mk
+
+EXE = tisp
+SRC = $(wildcard *.c */*.c)
+OBJ = $(SRC:.c=.o)
+
+all: options $(EXE)
+
+options:
+ @echo $(EXE) build options:
+ @echo "CFLAGS = $(CFLAGS)"
+ @echo "LDFLAGS = $(LDFLAGS)"
+
+.o:
+ @echo $(LD) $@
+ @$(LD) -o $@ $< $(LDFLAGS)
+
+.c.o:
+ @echo $(CC) $<
+ @$(CC) -c -o $@ $< $(CFLAGS)
+
+$(OBJ): config.h config.mk
+
+config.h:
+ @echo creating $@ from config.def.h
+ @cp config.def.h $@
+
+$(EXE): $(OBJ)
+ @echo $(CC) -o $@
+ @$(CC) -o $@ $(OBJ) $(LDFLAGS)
+
+clean:
+ @echo -n cleaning ...
+ @rm -f $(OBJ) $(EXE)
+ @echo \ done
+
+install: all
+ @echo -n installing $(EXE) to $(DESTDIR)$(PREFIX)/bin ...
+ @mkdir -p $(DESTDIR)$(PREFIX)/bin
+ @cp -f $(EXE) $(DESTDIR)$(PREFIX)/bin
+ @chmod 755 $(DESTDIR)$(PREFIX)/bin/$(EXE)
+ @echo \ done
+ @echo -n installing manual page to $(DESTDIR)$(MANPREFIX)/man1 ...
+ @mkdir -p $(DESTDIR)$(MANPREFIX)/man1
+ @sed "s/VERSION/$(VERSION)/g" < $(EXE).1 > $(DESTDIR)$(MANPREFIX)/man1/$(EXE).1
+ @chmod 644 $(DESTDIR)$(MANPREFIX)/man1/$(EXE).1
+ @echo \ done
+
+uninstall:
+ @echo -n removing $(EXE) from $(DESTDIR)$(PREFIX)/bin ...
+ @rm -f $(DESTDIR)$(PREFIX)/bin/$(EXE)
+ @echo \ done
+ @echo -n removing manual page from $(DESTDIR)$(MANPREFIX)/man1 ...
+ @rm -f $(DESTDIR)$(MANPREFIX)/man1/$(EXE).1
+ @echo \ done
+
+man:
+ @echo -n updating man page $(EXE).1 ...
+ @(head -1 README.md | sed "s/$(EXE)/$(EXE) 1 \"`date +%B\ %Y`\" \"$(EXE)\ $(VERSION)\"\n\n##NAME\n\n&/"; \
+ echo "\n##SYNOPSIS\n"; \
+ ./$(EXE) -h 2>&1 | sed -E 's/(\<[_A-Z][_A-Z]+\>)/\*\1\*/g' | \
+ sed -E 's/(-[a-Z]+\>)/\*\*\1\*\*/g' | \
+ sed -E 's/(\<$(EXE)\>)/\*\*\1\*\*/g' | \
+ sed 's/_/\\_/g' | sed 's/:/:\ /g'| cut -d' ' -f2-; \
+ echo "\n##DESCRIPTION"; \
+ tail +2 README.md;) | \
+ md2roff - | sed "9s/]/]\ /g" | sed "9s/|/|\ /g" > $(EXE).1
+ @echo \ done
+
+.PHONY: all options clean install uninstall man
diff --git a/README.md b/README.md
@@ -0,0 +1,34 @@
+# tisp \- tiny lisp
+
+Tiny lisp implementation, still in heavy development, barely even "useable."
+Designed to be scheme-like, ie very minimalist.
+
+## OPTIONS
+
+#### -h
+
+Print help and exit
+
+#### -v
+
+Print version info and exit
+
+## USAGE
+
+Run the program from the command line to launch the REPL, type command and
+press enter to see result. Alternatively you can pass a single command as the
+first argument to the command line program and see a result instantly.
+
+## AUTHOR
+
+Ed van Bruggen <ed@edryd.org>
+
+## SEE ALSO
+
+See project page at <https://edryd.org/projects/tisp.html>
+
+View source code at <https://github.com/edvb/tisp>
+
+## LICENSE
+
+zlib License
diff --git a/config.def.h b/config.def.h
@@ -0,0 +1,2 @@
+#define SHOW_HINTS 1
+#define USE_LINENOISE 1 /* TODO implement */
diff --git a/config.mk b/config.mk
@@ -0,0 +1,18 @@
+# tisp version number
+VERSION = 0.0.0
+
+# paths
+PREFIX = /usr/local
+MANPREFIX = $(PREFIX)/share/man
+
+# includes and libraries
+INCS = -Iinclude
+LIBS = -lm
+
+# flags
+CPPFLAGS = -DVERSION=\"$(VERSION)\" -D_DEFAULT_SOURCE -D_BSD_SOURCE -D_XOPEN_SOURCE=600
+CFLAGS = -g -std=c99 -pedantic -Wall $(INCS) $(CPPFLAGS)
+LDFLAGS = -g $(LIBS)
+
+# compiler and linker
+CC = cc
diff --git a/extern/arg.h b/extern/arg.h
@@ -0,0 +1,63 @@
+/*
+ * Copy me if you can.
+ * by 20h
+ */
+
+#ifndef ARG_H__
+#define ARG_H__
+
+extern char *argv0;
+
+/* use main(int argc, char *argv[]) */
+#define ARGBEGIN for (argv0 = basename(*argv), argv++, argc--;\
+ argv[0] && argv[0][0] == '-'\
+ && argv[0][1];\
+ argc--, argv++) {\
+ char argc_;\
+ char **argv_;\
+ int brk_;\
+ if (argv[0][1] == '-' && argv[0][2] == '\0') {\
+ argv++;\
+ argc--;\
+ break;\
+ }\
+ for (brk_ = 0, argv[0]++, argv_ = argv;\
+ argv[0][0] && !brk_;\
+ argv[0]++) {\
+ if (argv_ != argv)\
+ break;\
+ argc_ = argv[0][0];\
+ switch (argc_)
+
+/* Handles -NUM syntax */
+#define ARGNUM case '0':\
+ case '1':\
+ case '2':\
+ case '3':\
+ case '4':\
+ case '5':\
+ case '6':\
+ case '7':\
+ case '8':\
+ case '9'
+
+#define ARGEND }\
+ }
+
+#define ARGC() argc_
+
+#define ARGNUMF() (brk_ = 1, atoi(argv[0]))
+
+#define EARGF(x) ((argv[0][1] == '\0' && argv[1] == NULL)?\
+ ((x), abort(), (char *)0) :\
+ (brk_ = 1, (argv[0][1] != '\0')?\
+ (&argv[0][1]) :\
+ (argc--, argv++, argv[0])))
+
+#define ARGF() ((argv[0][1] == '\0' && argv[1] == NULL)?\
+ (char *)0 :\
+ (brk_ = 1, (argv[0][1] != '\0')?\
+ (&argv[0][1]) :\
+ (argc--, argv++, argv[0])))
+
+#endif
diff --git a/extern/linenoise.c b/extern/linenoise.c
@@ -0,0 +1,1199 @@
+/* linenoise.c -- guerrilla line editing library against the idea that a
+ * line editing lib needs to be 20,000 lines of C code.
+ *
+ * You can find the latest source code at:
+ *
+ * http://github.com/antirez/linenoise
+ *
+ * Does a number of crazy assumptions that happen to be true in 99.9999% of
+ * the 2010 UNIX computers around.
+ *
+ * ------------------------------------------------------------------------
+ *
+ * Copyright (c) 2010-2016, Salvatore Sanfilippo <antirez at gmail dot com>
+ * Copyright (c) 2010-2013, Pieter Noordhuis <pcnoordhuis at gmail dot 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.
+ *
+ * ------------------------------------------------------------------------
+ *
+ * References:
+ * - http://invisible-island.net/xterm/ctlseqs/ctlseqs.html
+ * - http://www.3waylabs.com/nw/WWW/products/wizcon/vt220.html
+ *
+ * Todo list:
+ * - Filter bogus Ctrl+<char> combinations.
+ * - Win32 support
+ *
+ * Bloat:
+ * - History search like Ctrl+r in readline?
+ *
+ * List of escape sequences used by this program, we do everything just
+ * with three sequences. In order to be so cheap we may have some
+ * flickering effect with some slow terminal, but the lesser sequences
+ * the more compatible.
+ *
+ * EL (Erase Line)
+ * Sequence: ESC [ n K
+ * Effect: if n is 0 or missing, clear from cursor to end of line
+ * Effect: if n is 1, clear from beginning of line to cursor
+ * Effect: if n is 2, clear entire line
+ *
+ * CUF (CUrsor Forward)
+ * Sequence: ESC [ n C
+ * Effect: moves cursor forward n chars
+ *
+ * CUB (CUrsor Backward)
+ * Sequence: ESC [ n D
+ * Effect: moves cursor backward n chars
+ *
+ * The following is used to get the terminal width if getting
+ * the width with the TIOCGWINSZ ioctl fails
+ *
+ * DSR (Device Status Report)
+ * Sequence: ESC [ 6 n
+ * Effect: reports the current cusor position as ESC [ n ; m R
+ * where n is the row and m is the column
+ *
+ * When multi line mode is enabled, we also use an additional escape
+ * sequence. However multi line editing is disabled by default.
+ *
+ * CUU (Cursor Up)
+ * Sequence: ESC [ n A
+ * Effect: moves cursor up of n chars.
+ *
+ * CUD (Cursor Down)
+ * Sequence: ESC [ n B
+ * Effect: moves cursor down of n chars.
+ *
+ * When linenoiseClearScreen() is called, two additional escape sequences
+ * are used in order to clear the screen and position the cursor at home
+ * position.
+ *
+ * CUP (Cursor position)
+ * Sequence: ESC [ H
+ * Effect: moves the cursor to upper left corner
+ *
+ * ED (Erase display)
+ * Sequence: ESC [ 2 J
+ * Effect: clear the whole screen
+ *
+ */
+
+#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 <unistd.h>
+#include "linenoise.h"
+
+#define LINENOISE_DEFAULT_HISTORY_MAX_LEN 100
+#define LINENOISE_MAX_LINE 4096
+static char *unsupported_term[] = {"dumb","cons25","emacs",NULL};
+static linenoiseCompletionCallback *completionCallback = NULL;
+static linenoiseHintsCallback *hintsCallback = NULL;
+static linenoiseFreeHintsCallback *freeHintsCallback = NULL;
+
+static struct termios orig_termios; /* In order to restore at exit.*/
+static int rawmode = 0; /* For atexit() function to check if restore is needed*/
+static int mlmode = 0; /* Multi line mode. Default is single line. */
+static int atexit_registered = 0; /* Register atexit just 1 time. */
+static int history_max_len = LINENOISE_DEFAULT_HISTORY_MAX_LEN;
+static int history_len = 0;
+static char **history = NULL;
+
+/* The linenoiseState structure represents the state during line editing.
+ * We pass this state to functions implementing specific editing
+ * functionalities. */
+struct linenoiseState {
+ int ifd; /* Terminal stdin file descriptor. */
+ int ofd; /* Terminal stdout file descriptor. */
+ char *buf; /* Edited line buffer. */
+ size_t buflen; /* Edited line buffer size. */
+ const char *prompt; /* Prompt to display. */
+ size_t plen; /* Prompt length. */
+ size_t pos; /* Current cursor position. */
+ size_t oldpos; /* Previous refresh cursor position. */
+ size_t len; /* Current edited line length. */
+ size_t cols; /* Number of columns in terminal. */
+ size_t maxrows; /* Maximum num of rows used so far (multiline mode) */
+ int history_index; /* The history index we are currently editing. */
+};
+
+enum KEY_ACTION{
+ KEY_NULL = 0, /* NULL */
+ CTRL_A = 1, /* Ctrl+a */
+ CTRL_B = 2, /* Ctrl-b */
+ CTRL_C = 3, /* Ctrl-c */
+ CTRL_D = 4, /* Ctrl-d */
+ CTRL_E = 5, /* Ctrl-e */
+ CTRL_F = 6, /* Ctrl-f */
+ CTRL_H = 8, /* Ctrl-h */
+ TAB = 9, /* Tab */
+ CTRL_K = 11, /* Ctrl+k */
+ CTRL_L = 12, /* Ctrl+l */
+ ENTER = 13, /* Enter */
+ CTRL_N = 14, /* Ctrl-n */
+ CTRL_P = 16, /* Ctrl-p */
+ CTRL_T = 20, /* Ctrl-t */
+ CTRL_U = 21, /* Ctrl+u */
+ CTRL_W = 23, /* Ctrl+w */
+ ESC = 27, /* Escape */
+ BACKSPACE = 127 /* Backspace */
+};
+
+static void linenoiseAtExit(void);
+int linenoiseHistoryAdd(const char *line);
+static void refreshLine(struct linenoiseState *l);
+
+/* Debugging macro. */
+#if 0
+FILE *lndebug_fp = NULL;
+#define lndebug(...) \
+ do { \
+ if (lndebug_fp == NULL) { \
+ lndebug_fp = fopen("/tmp/lndebug.txt","a"); \
+ fprintf(lndebug_fp, \
+ "[%d %d %d] p: %d, rows: %d, rpos: %d, max: %d, oldmax: %d\n", \
+ (int)l->len,(int)l->pos,(int)l->oldpos,plen,rows,rpos, \
+ (int)l->maxrows,old_rows); \
+ } \
+ fprintf(lndebug_fp, ", " __VA_ARGS__); \
+ fflush(lndebug_fp); \
+ } while (0)
+#else
+#define lndebug(fmt, ...)
+#endif
+
+/* ======================= Low level terminal handling ====================== */
+
+/* Set if to use or not the multi line mode. */
+void linenoiseSetMultiLine(int ml) {
+ mlmode = ml;
+}
+
+/* Return true if the terminal name is in the list of terminals we know are
+ * not able to understand basic escape sequences. */
+static int isUnsupportedTerm(void) {
+ char *term = getenv("TERM");
+ int j;
+
+ if (term == NULL) return 0;
+ for (j = 0; unsupported_term[j]; j++)
+ if (!strcasecmp(term,unsupported_term[j])) return 1;
+ return 0;
+}
+
+/* Raw mode: 1960 magic shit. */
+static int enableRawMode(int fd) {
+ struct termios raw;
+
+ if (!isatty(STDIN_FILENO)) goto fatal;
+ if (!atexit_registered) {
+ atexit(linenoiseAtExit);
+ atexit_registered = 1;
+ }
+ if (tcgetattr(fd,&orig_termios) == -1) goto fatal;
+
+ raw = orig_termios; /* modify the original mode */
+ /* input modes: no break, no CR to NL, no parity check, no strip char,
+ * no start/stop output control. */
+ raw.c_iflag &= ~(BRKINT | ICRNL | INPCK | ISTRIP | IXON);
+ /* output modes - disable post processing */
+ raw.c_oflag &= ~(OPOST);
+ /* control modes - set 8 bit chars */
+ raw.c_cflag |= (CS8);
+ /* local modes - choing off, canonical off, no extended functions,
+ * no signal chars (^Z,^C) */
+ raw.c_lflag &= ~(ECHO | ICANON | IEXTEN | ISIG);
+ /* control chars - set return condition: min number of bytes and timer.
+ * We want read to return every single byte, without timeout. */
+ raw.c_cc[VMIN] = 1; raw.c_cc[VTIME] = 0; /* 1 byte, no timer */
+
+ /* put terminal in raw mode after flushing */
+ if (tcsetattr(fd,TCSAFLUSH,&raw) < 0) goto fatal;
+ rawmode = 1;
+ return 0;
+
+fatal:
+ errno = ENOTTY;
+ return -1;
+}
+
+static void disableRawMode(int fd) {
+ /* Don't even check the return value as it's too late. */
+ if (rawmode && tcsetattr(fd,TCSAFLUSH,&orig_termios) != -1)
+ rawmode = 0;
+}
+
+/* Use the ESC [6n escape sequence to query the horizontal cursor position
+ * and return it. On error -1 is returned, on success the position of the
+ * cursor. */
+static int getCursorPosition(int ifd, int ofd) {
+ char buf[32];
+ int cols, rows;
+ unsigned int i = 0;
+
+ /* Report cursor location */
+ if (write(ofd, "\x1b[6n", 4) != 4) return -1;
+
+ /* Read the response: ESC [ rows ; cols R */
+ while (i < sizeof(buf)-1) {
+ if (read(ifd,buf+i,1) != 1) break;
+ if (buf[i] == 'R') break;
+ i++;
+ }
+ buf[i] = '\0';
+
+ /* Parse it. */
+ if (buf[0] != ESC || buf[1] != '[') return -1;
+ if (sscanf(buf+2,"%d;%d",&rows,&cols) != 2) return -1;
+ return cols;
+}
+
+/* Try to get the number of columns in the current terminal, or assume 80
+ * if it fails. */
+static int getColumns(int ifd, int ofd) {
+ struct winsize ws;
+
+ if (ioctl(1, TIOCGWINSZ, &ws) == -1 || ws.ws_col == 0) {
+ /* ioctl() failed. Try to query the terminal itself. */
+ int start, cols;
+
+ /* Get the initial position so we can restore it later. */
+ start = getCursorPosition(ifd,ofd);
+ if (start == -1) goto failed;
+
+ /* Go to right margin and get position. */
+ if (write(ofd,"\x1b[999C",6) != 6) goto failed;
+ cols = getCursorPosition(ifd,ofd);
+ if (cols == -1) goto failed;
+
+ /* Restore position. */
+ if (cols > start) {
+ char seq[32];
+ snprintf(seq,32,"\x1b[%dD",cols-start);
+ if (write(ofd,seq,strlen(seq)) == -1) {
+ /* Can't recover... */
+ }
+ }
+ return cols;
+ } else {
+ return ws.ws_col;
+ }
+
+failed:
+ return 80;
+}
+
+/* Clear the screen. Used to handle ctrl+l */
+void linenoiseClearScreen(void) {
+ if (write(STDOUT_FILENO,"\x1b[H\x1b[2J",7) <= 0) {
+ /* nothing to do, just to avoid warning. */
+ }
+}
+
+/* Beep, used for completion when there is nothing to complete or when all
+ * the choices were already shown. */
+static void linenoiseBeep(void) {
+ fprintf(stderr, "\x7");
+ fflush(stderr);
+}
+
+/* ============================== Completion ================================ */
+
+/* Free a list of completion option populated by linenoiseAddCompletion(). */
+static void freeCompletions(linenoiseCompletions *lc) {
+ size_t i;
+ for (i = 0; i < lc->len; i++)
+ free(lc->cvec[i]);
+ if (lc->cvec != NULL)
+ free(lc->cvec);
+}
+
+/* This is an helper function for linenoiseEdit() 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 linenoiseState
+ * structure as described in the structure definition. */
+static int completeLine(struct linenoiseState *ls) {
+ linenoiseCompletions lc = { 0, NULL };
+ int nread, nwritten;
+ char c = 0;
+
+ completionCallback(ls->buf,&lc);
+ if (lc.len == 0) {
+ linenoiseBeep();
+ } else {
+ size_t stop = 0, i = 0;
+
+ while(!stop) {
+ /* Show completion or original buffer */
+ if (i < lc.len) {
+ struct linenoiseState saved = *ls;
+
+ ls->len = ls->pos = strlen(lc.cvec[i]);
+ ls->buf = lc.cvec[i];
+ refreshLine(ls);
+ ls->len = saved.len;
+ ls->pos = saved.pos;
+ ls->buf = saved.buf;
+ } else {
+ refreshLine(ls);
+ }
+
+ nread = read(ls->ifd,&c,1);
+ if (nread <= 0) {
+ freeCompletions(&lc);
+ return -1;
+ }
+
+ switch(c) {
+ case 9: /* tab */
+ i = (i+1) % (lc.len+1);
+ if (i == lc.len) linenoiseBeep();
+ break;
+ case 27: /* escape */
+ /* Re-show original buffer */
+ if (i < lc.len) refreshLine(ls);
+ stop = 1;
+ break;
+ default:
+ /* Update buffer and return */
+ if (i < lc.len) {
+ nwritten = snprintf(ls->buf,ls->buflen,"%s",lc.cvec[i]);
+ ls->len = ls->pos = nwritten;
+ }
+ stop = 1;
+ break;
+ }
+ }
+ }
+
+ freeCompletions(&lc);
+ return c; /* Return last read character */
+}
+
+/* Register a callback function to be called for tab-completion. */
+void linenoiseSetCompletionCallback(linenoiseCompletionCallback *fn) {
+ completionCallback = fn;
+}
+
+/* Register a hits function to be called to show hits to the user at the
+ * right of the prompt. */
+void linenoiseSetHintsCallback(linenoiseHintsCallback *fn) {
+ hintsCallback = fn;
+}
+
+/* Register a function to free the hints returned by the hints callback
+ * registered with linenoiseSetHintsCallback(). */
+void linenoiseSetFreeHintsCallback(linenoiseFreeHintsCallback *fn) {
+ freeHintsCallback = fn;
+}
+
+/* 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 linenoiseAddCompletion(linenoiseCompletions *lc, const char *str) {
+ size_t len = strlen(str);
+ char *copy, **cvec;
+
+ copy = malloc(len+1);
+ if (copy == NULL) return;
+ memcpy(copy,str,len+1);
+ cvec = realloc(lc->cvec,sizeof(char*)*(lc->len+1));
+ if (cvec == NULL) {
+ free(copy);
+ return;
+ }
+ lc->cvec = cvec;
+ lc->cvec[lc->len++] = copy;
+}
+
+/* =========================== Line editing ================================= */
+
+/* We define a very simple "append buffer" structure, that is an heap
+ * allocated string where we can append to. This is useful in order to
+ * write all the escape sequences in a buffer and flush them to the standard
+ * output in a single call, to avoid flickering effects. */
+struct abuf {
+ char *b;
+ int len;
+};
+
+static void abInit(struct abuf *ab) {
+ ab->b = NULL;
+ ab->len = 0;
+}
+
+static void abAppend(struct abuf *ab, const char *s, int len) {
+ char *new = realloc(ab->b,ab->len+len);
+
+ if (new == NULL) return;
+ memcpy(new+ab->len,s,len);
+ ab->b = new;
+ ab->len += len;
+}
+
+static void abFree(struct abuf *ab) {
+ free(ab->b);
+}
+
+/* Helper of refreshSingleLine() and refreshMultiLine() to show hints
+ * to the right of the prompt. */
+void refreshShowHints(struct abuf *ab, struct linenoiseState *l, int plen) {
+ char seq[64];
+ if (hintsCallback && plen+l->len < l->cols) {
+ int color = -1, bold = 0;
+ char *hint = hintsCallback(l->buf,&color,&bold);
+ if (hint) {
+ int hintlen = strlen(hint);
+ int hintmaxlen = l->cols-(plen+l->len);
+ if (hintlen > hintmaxlen) hintlen = hintmaxlen;
+ if (bold == 1 && color == -1) color = 37;
+ if (color != -1 || bold != 0)
+ snprintf(seq,64,"\033[%d;%d;49m",bold,color);
+ abAppend(ab,seq,strlen(seq));
+ abAppend(ab,hint,hintlen);
+ if (color != -1 || bold != 0)
+ abAppend(ab,"\033[0m",4);
+ /* Call the function to free the hint returned. */
+ if (freeHintsCallback) freeHintsCallback(hint);
+ }
+ }
+}
+
+/* Single line low level line refresh.
+ *
+ * Rewrite the currently edited line accordingly to the buffer content,
+ * cursor position, and number of columns of the terminal. */
+static void refreshSingleLine(struct linenoiseState *l) {
+ char seq[64];
+ size_t plen = strlen(l->prompt);
+ int fd = l->ofd;
+ char *buf = l->buf;
+ size_t len = l->len;
+ size_t pos = l->pos;
+ struct abuf ab;
+
+ while((plen+pos) >= l->cols) {
+ buf++;
+ len--;
+ pos--;
+ }
+ while (plen+len > l->cols) {
+ len--;
+ }
+
+ abInit(&ab);
+ /* Cursor to left edge */
+ snprintf(seq,64,"\r");
+ abAppend(&ab,seq,strlen(seq));
+ /* Write the prompt and the current buffer content */
+ abAppend(&ab,l->prompt,strlen(l->prompt));
+ abAppend(&ab,buf,len);
+ /* Show hits if any. */
+ refreshShowHints(&ab,l,plen);
+ /* Erase to right */
+ snprintf(seq,64,"\x1b[0K");
+ abAppend(&ab,seq,strlen(seq));
+ /* Move cursor to original position. */
+ snprintf(seq,64,"\r\x1b[%dC", (int)(pos+plen));
+ abAppend(&ab,seq,strlen(seq));
+ if (write(fd,ab.b,ab.len) == -1) {} /* Can't recover from write error. */
+ abFree(&ab);
+}
+
+/* Multi line low level line refresh.
+ *
+ * Rewrite the currently edited line accordingly to the buffer content,
+ * cursor position, and number of columns of the terminal. */
+static void refreshMultiLine(struct linenoiseState *l) {
+ char seq[64];
+ int plen = strlen(l->prompt);
+ int rows = (plen+l->len+l->cols-1)/l->cols; /* rows used by current buf. */
+ int rpos = (plen+l->oldpos+l->cols)/l->cols; /* cursor relative row. */
+ int rpos2; /* rpos after refresh. */
+ int col; /* colum position, zero-based. */
+ int old_rows = l->maxrows;
+ int fd = l->ofd, j;
+ struct abuf ab;
+
+ /* Update maxrows if needed. */
+ if (rows > (int)l->maxrows) l->maxrows = rows;
+
+ /* First step: clear all the lines used before. To do so start by
+ * going to the last row. */
+ abInit(&ab);
+ if (old_rows-rpos > 0) {
+ lndebug("go down %d", old_rows-rpos);
+ snprintf(seq,64,"\x1b[%dB", old_rows-rpos);
+ abAppend(&ab,seq,strlen(seq));
+ }
+
+ /* Now for every row clear it, go up. */
+ for (j = 0; j < old_rows-1; j++) {
+ lndebug("clear+up");
+ snprintf(seq,64,"\r\x1b[0K\x1b[1A");
+ abAppend(&ab,seq,strlen(seq));
+ }
+
+ /* Clean the top line. */
+ lndebug("clear");
+ snprintf(seq,64,"\r\x1b[0K");
+ abAppend(&ab,seq,strlen(seq));
+
+ /* Write the prompt and the current buffer content */
+ abAppend(&ab,l->prompt,strlen(l->prompt));
+ abAppend(&ab,l->buf,l->len);
+
+ /* Show hits if any. */
+ refreshShowHints(&ab,l,plen);
+
+ /* 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 (l->pos &&
+ l->pos == l->len &&
+ (l->pos+plen) % l->cols == 0)
+ {
+ lndebug("<newline>");
+ abAppend(&ab,"\n",1);
+ snprintf(seq,64,"\r");
+ abAppend(&ab,seq,strlen(seq));
+ rows++;
+ if (rows > (int)l->maxrows) l->maxrows = rows;
+ }
+
+ /* Move cursor to right position. */
+ rpos2 = (plen+l->pos+l->cols)/l->cols; /* current cursor relative row. */
+ lndebug("rpos2 %d", rpos2);
+
+ /* Go up till we reach the expected positon. */
+ if (rows-rpos2 > 0) {
+ lndebug("go-up %d", rows-rpos2);
+ snprintf(seq,64,"\x1b[%dA", rows-rpos2);
+ abAppend(&ab,seq,strlen(seq));
+ }
+
+ /* Set column. */
+ col = (plen+(int)l->pos) % (int)l->cols;
+ lndebug("set col %d", 1+col);
+ if (col)
+ snprintf(seq,64,"\r\x1b[%dC", col);
+ else
+ snprintf(seq,64,"\r");
+ abAppend(&ab,seq,strlen(seq));
+
+ lndebug("\n");
+ l->oldpos = l->pos;
+
+ if (write(fd,ab.b,ab.len) == -1) {} /* Can't recover from write error. */
+ abFree(&ab);
+}
+
+/* Calls the two low level functions refreshSingleLine() or
+ * refreshMultiLine() according to the selected mode. */
+static void refreshLine(struct linenoiseState *l) {
+ if (mlmode)
+ refreshMultiLine(l);
+ else
+ refreshSingleLine(l);
+}
+
+/* Insert the character 'c' at cursor current position.
+ *
+ * On error writing to the terminal -1 is returned, otherwise 0. */
+int linenoiseEditInsert(struct linenoiseState *l, char c) {
+ if (l->len < l->buflen) {
+ if (l->len == l->pos) {
+ l->buf[l->pos] = c;
+ l->pos++;
+ l->len++;
+ l->buf[l->len] = '\0';
+ if ((!mlmode && l->plen+l->len < l->cols && !hintsCallback)) {
+ /* Avoid a full update of the line in the
+ * trivial case. */
+ if (write(l->ofd,&c,1) == -1) return -1;
+ } else {
+ refreshLine(l);
+ }
+ } else {
+ memmove(l->buf+l->pos+1,l->buf+l->pos,l->len-l->pos);
+ l->buf[l->pos] = c;
+ l->len++;
+ l->pos++;
+ l->buf[l->len] = '\0';
+ refreshLine(l);
+ }
+ }
+ return 0;
+}
+
+/* Move cursor on the left. */
+void linenoiseEditMoveLeft(struct linenoiseState *l) {
+ if (l->pos > 0) {
+ l->pos--;
+ refreshLine(l);
+ }
+}
+
+/* Move cursor on the right. */
+void linenoiseEditMoveRight(struct linenoiseState *l) {
+ if (l->pos != l->len) {
+ l->pos++;
+ refreshLine(l);
+ }
+}
+
+/* Move cursor to the start of the line. */
+void linenoiseEditMoveHome(struct linenoiseState *l) {
+ if (l->pos != 0) {
+ l->pos = 0;
+ refreshLine(l);
+ }
+}
+
+/* Move cursor to the end of the line. */
+void linenoiseEditMoveEnd(struct linenoiseState *l) {
+ if (l->pos != l->len) {
+ l->pos = l->len;
+ refreshLine(l);
+ }
+}
+
+/* Substitute the currently edited line with the next or previous history
+ * entry as specified by 'dir'. */
+#define LINENOISE_HISTORY_NEXT 0
+#define LINENOISE_HISTORY_PREV 1
+void linenoiseEditHistoryNext(struct linenoiseState *l, int dir) {
+ if (history_len > 1) {
+ /* Update the current history entry before to
+ * overwrite it with the next one. */
+ free(history[history_len - 1 - l->history_index]);
+ history[history_len - 1 - l->history_index] = strdup(l->buf);
+ /* Show the new entry */
+ l->history_index += (dir == LINENOISE_HISTORY_PREV) ? 1 : -1;
+ if (l->history_index < 0) {
+ l->history_index = 0;
+ return;
+ } else if (l->history_index >= history_len) {
+ l->history_index = history_len-1;
+ return;
+ }
+ strncpy(l->buf,history[history_len - 1 - l->history_index],l->buflen);
+ l->buf[l->buflen-1] = '\0';
+ l->len = l->pos = strlen(l->buf);
+ refreshLine(l);
+ }
+}
+
+/* Delete the character at the right of the cursor without altering the cursor
+ * position. Basically this is what happens with the "Delete" keyboard key. */
+void linenoiseEditDelete(struct linenoiseState *l) {
+ if (l->len > 0 && l->pos < l->len) {
+ memmove(l->buf+l->pos,l->buf+l->pos+1,l->len-l->pos-1);
+ l->len--;
+ l->buf[l->len] = '\0';
+ refreshLine(l);
+ }
+}
+
+/* Backspace implementation. */
+void linenoiseEditBackspace(struct linenoiseState *l) {
+ if (l->pos > 0 && l->len > 0) {
+ memmove(l->buf+l->pos-1,l->buf+l->pos,l->len-l->pos);
+ l->pos--;
+ l->len--;
+ l->buf[l->len] = '\0';
+ refreshLine(l);
+ }
+}
+
+/* Delete the previosu word, maintaining the cursor at the start of the
+ * current word. */
+void linenoiseEditDeletePrevWord(struct linenoiseState *l) {
+ size_t old_pos = l->pos;
+ size_t diff;
+
+ while (l->pos > 0 && l->buf[l->pos-1] == ' ')
+ l->pos--;
+ while (l->pos > 0 && l->buf[l->pos-1] != ' ')
+ l->pos--;
+ diff = old_pos - l->pos;
+ memmove(l->buf+l->pos,l->buf+old_pos,l->len-old_pos+1);
+ l->len -= diff;
+ refreshLine(l);
+}
+
+/* This function is the core of the line editing capability of linenoise.
+ * 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.
+ *
+ * The function returns the length of the current buffer. */
+static int linenoiseEdit(int stdin_fd, int stdout_fd, char *buf, size_t buflen, const char *prompt)
+{
+ struct linenoiseState l;
+
+ /* Populate the linenoise state that we pass to functions implementing
+ * specific editing functionalities. */
+ l.ifd = stdin_fd;
+ l.ofd = stdout_fd;
+ l.buf = buf;
+ l.buflen = buflen;
+ l.prompt = prompt;
+ l.plen = strlen(prompt);
+ l.oldpos = l.pos = 0;
+ l.len = 0;
+ l.cols = getColumns(stdin_fd, stdout_fd);
+ l.maxrows = 0;
+ l.history_index = 0;
+
+ /* Buffer starts empty. */
+ l.buf[0] = '\0';
+ l.buflen--; /* Make sure there is always space for the nulterm */
+
+ /* The latest history entry is always our current buffer, that
+ * initially is just an empty string. */
+ linenoiseHistoryAdd("");
+
+ if (write(l.ofd,prompt,l.plen) == -1) return -1;
+ while(1) {
+ char c;
+ int nread;
+ char seq[3];
+
+ nread = read(l.ifd,&c,1);
+ if (nread <= 0) return l.len;
+
+ /* Only autocomplete when the callback is set. It returns < 0 when
+ * there was an error reading from fd. Otherwise it will return the
+ * character that should be handled next. */
+ if (c == 9 && completionCallback != NULL) {
+ c = completeLine(&l);
+ /* Return on errors */
+ if (c < 0) return l.len;
+ /* Read next character when 0 */
+ if (c == 0) continue;
+ }
+
+ switch(c) {
+ case ENTER: /* enter */
+ history_len--;
+ free(history[history_len]);
+ if (mlmode) linenoiseEditMoveEnd(&l);
+ if (hintsCallback) {
+ /* Force a refresh without hints to leave the previous
+ * line as the user typed it after a newline. */
+ linenoiseHintsCallback *hc = hintsCallback;
+ hintsCallback = NULL;
+ refreshLine(&l);
+ hintsCallback = hc;
+ }
+ return (int)l.len;
+ case CTRL_C: /* ctrl-c */
+ errno = EAGAIN;
+ return -1;
+ case BACKSPACE: /* backspace */
+ case 8: /* ctrl-h */
+ linenoiseEditBackspace(&l);
+ break;
+ case CTRL_D: /* ctrl-d, remove char at right of cursor, or if the
+ line is empty, act as end-of-file. */
+ if (l.len > 0) {
+ linenoiseEditDelete(&l);
+ } else {
+ history_len--;
+ free(history[history_len]);
+ return -1;
+ }
+ break;
+ case CTRL_T: /* ctrl-t, swaps current character with previous. */
+ if (l.pos > 0 && l.pos < l.len) {
+ int aux = buf[l.pos-1];
+ buf[l.pos-1] = buf[l.pos];
+ buf[l.pos] = aux;
+ if (l.pos != l.len-1) l.pos++;
+ refreshLine(&l);
+ }
+ break;
+ case CTRL_B: /* ctrl-b */
+ linenoiseEditMoveLeft(&l);
+ break;
+ case CTRL_F: /* ctrl-f */
+ linenoiseEditMoveRight(&l);
+ break;
+ case CTRL_P: /* ctrl-p */
+ linenoiseEditHistoryNext(&l, LINENOISE_HISTORY_PREV);
+ break;
+ case CTRL_N: /* ctrl-n */
+ linenoiseEditHistoryNext(&l, LINENOISE_HISTORY_NEXT);
+ break;
+ case ESC: /* escape sequence */
+ /* Read the next two bytes representing the escape sequence.
+ * Use two calls to handle slow terminals returning the two
+ * chars at different times. */
+ if (read(l.ifd,seq,1) == -1) break;
+ if (read(l.ifd,seq+1,1) == -1) break;
+
+ /* ESC [ sequences. */
+ if (seq[0] == '[') {
+ if (seq[1] >= '0' && seq[1] <= '9') {
+ /* Extended escape, read additional byte. */
+ if (read(l.ifd,seq+2,1) == -1) break;
+ if (seq[2] == '~') {
+ switch(seq[1]) {
+ case '3': /* Delete key. */
+ linenoiseEditDelete(&l);
+ break;
+ }
+ }
+ } else {
+ switch(seq[1]) {
+ case 'A': /* Up */
+ linenoiseEditHistoryNext(&l, LINENOISE_HISTORY_PREV);
+ break;
+ case 'B': /* Down */
+ linenoiseEditHistoryNext(&l, LINENOISE_HISTORY_NEXT);
+ break;
+ case 'C': /* Right */
+ linenoiseEditMoveRight(&l);
+ break;
+ case 'D': /* Left */
+ linenoiseEditMoveLeft(&l);
+ break;
+ case 'H': /* Home */
+ linenoiseEditMoveHome(&l);
+ break;
+ case 'F': /* End*/
+ linenoiseEditMoveEnd(&l);
+ break;
+ }
+ }
+ }
+
+ /* ESC O sequences. */
+ else if (seq[0] == 'O') {
+ switch(seq[1]) {
+ case 'H': /* Home */
+ linenoiseEditMoveHome(&l);
+ break;
+ case 'F': /* End*/
+ linenoiseEditMoveEnd(&l);
+ break;
+ }
+ }
+ break;
+ default:
+ if (linenoiseEditInsert(&l,c)) return -1;
+ break;
+ case CTRL_U: /* Ctrl+u, delete the whole line. */
+ buf[0] = '\0';
+ l.pos = l.len = 0;
+ refreshLine(&l);
+ break;
+ case CTRL_K: /* Ctrl+k, delete from current to end of line. */
+ buf[l.pos] = '\0';
+ l.len = l.pos;
+ refreshLine(&l);
+ break;
+ case CTRL_A: /* Ctrl+a, go to the start of the line */
+ linenoiseEditMoveHome(&l);
+ break;
+ case CTRL_E: /* ctrl+e, go to the end of the line */
+ linenoiseEditMoveEnd(&l);
+ break;
+ case CTRL_L: /* ctrl+l, clear screen */
+ linenoiseClearScreen();
+ refreshLine(&l);
+ break;
+ case CTRL_W: /* ctrl+w, delete previous word */
+ linenoiseEditDeletePrevWord(&l);
+ break;
+ }
+ }
+ return l.len;
+}
+
+/* This special mode is used by linenoise in order to print scan codes
+ * on screen for debugging / development purposes. It is implemented
+ * by the linenoise_example program using the --keycodes option. */
+void linenoisePrintKeyCodes(void) {
+ char quit[4];
+
+ printf("Linenoise key codes debugging mode.\n"
+ "Press keys to see scan codes. Type 'quit' at any time to exit.\n");
+ if (enableRawMode(STDIN_FILENO) == -1) return;
+ memset(quit,' ',4);
+ while(1) {
+ char c;
+ int nread;
+
+ nread = read(STDIN_FILENO,&c,1);
+ if (nread <= 0) continue;
+ memmove(quit,quit+1,sizeof(quit)-1); /* shift string to left. */
+ quit[sizeof(quit)-1] = c; /* Insert current char on the right. */
+ if (memcmp(quit,"quit",sizeof(quit)) == 0) break;
+
+ printf("'%c' %02x (%d) (type quit to exit)\n",
+ isprint(c) ? c : '?', (int)c, (int)c);
+ printf("\r"); /* Go left edge manually, we are in raw mode. */
+ fflush(stdout);
+ }
+ disableRawMode(STDIN_FILENO);
+}
+
+/* This function calls the line editing function linenoiseEdit() using
+ * the STDIN file descriptor set in raw mode. */
+static int linenoiseRaw(char *buf, size_t buflen, const char *prompt) {
+ int count;
+
+ if (buflen == 0) {
+ errno = EINVAL;
+ return -1;
+ }
+
+ if (enableRawMode(STDIN_FILENO) == -1) return -1;
+ count = linenoiseEdit(STDIN_FILENO, STDOUT_FILENO, buf, buflen, prompt);
+ disableRawMode(STDIN_FILENO);
+ printf("\n");
+ return count;
+}
+
+/* This function is called when linenoise() is called with the standard
+ * input file descriptor not attached to a TTY. So for example when the
+ * program using linenoise is called in pipe or with a file redirected
+ * to its standard input. In this case, we want to be able to return the
+ * line regardless of its length (by default we are limited to 4k). */
+static char *linenoiseNoTTY(void) {
+ char *line = NULL;
+ size_t len = 0, maxlen = 0;
+
+ while(1) {
+ if (len == maxlen) {
+ if (maxlen == 0) maxlen = 16;
+ maxlen *= 2;
+ char *oldval = line;
+ line = realloc(line,maxlen);
+ if (line == NULL) {
+ if (oldval) free(oldval);
+ return NULL;
+ }
+ }
+ int c = fgetc(stdin);
+ if (c == EOF || c == '\n') {
+ if (c == EOF && len == 0) {
+ free(line);
+ return NULL;
+ } else {
+ line[len] = '\0';
+ return line;
+ }
+ } else {
+ line[len] = c;
+ len++;
+ }
+ }
+}
+
+/* The high level function that is the main API of the linenoise library.
+ * This function checks if the terminal has basic capabilities, just checking
+ * for a blacklist of stupid 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. */
+char *linenoise(const char *prompt) {
+ char buf[LINENOISE_MAX_LINE];
+ int count;
+
+ if (!isatty(STDIN_FILENO)) {
+ /* Not a tty: read from file / pipe. In this mode we don't want any
+ * limit to the line size, so we call a function to handle that. */
+ return linenoiseNoTTY();
+ } else if (isUnsupportedTerm()) {
+ size_t len;
+
+ printf("%s",prompt);
+ fflush(stdout);
+ if (fgets(buf,LINENOISE_MAX_LINE,stdin) == NULL) return NULL;
+ len = strlen(buf);
+ while(len && (buf[len-1] == '\n' || buf[len-1] == '\r')) {
+ len--;
+ buf[len] = '\0';
+ }
+ return strdup(buf);
+ } else {
+ count = linenoiseRaw(buf,LINENOISE_MAX_LINE,prompt);
+ if (count == -1) return NULL;
+ return strdup(buf);
+ }
+}
+
+/* This is just a wrapper the user may want to call in order to make sure
+ * the linenoise returned buffer is freed with the same allocator it was
+ * created with. Useful when the main program is using an alternative
+ * allocator. */
+void linenoiseFree(void *ptr) {
+ free(ptr);
+}
+
+/* ================================ History ================================= */
+
+/* Free the history, but does not reset it. Only used when we have to
+ * exit() to avoid memory leaks are reported by valgrind & co. */
+static void freeHistory(void) {
+ if (history) {
+ int j;
+
+ for (j = 0; j < history_len; j++)
+ free(history[j]);
+ free(history);
+ }
+}
+
+/* At exit we'll try to fix the terminal to the initial conditions. */
+static void linenoiseAtExit(void) {
+ disableRawMode(STDIN_FILENO);
+ freeHistory();
+}
+
+/* This is the API call to add a new entry in the linenoise history.
+ * It uses a fixed array of char pointers that are shifted (memmoved)
+ * when the history max length is reached in order to remove the older
+ * entry and make room for the new one, so it is not exactly suitable for huge
+ * histories, but will work well for a few hundred of entries.
+ *
+ * Using a circular buffer is smarter, but a bit more complex to handle. */
+int linenoiseHistoryAdd(const char *line) {
+ char *linecopy;
+
+ if (history_max_len == 0) return 0;
+
+ /* Initialization on first call. */
+ if (history == NULL) {
+ history = malloc(sizeof(char*)*history_max_len);
+ if (history == NULL) return 0;
+ memset(history,0,(sizeof(char*)*history_max_len));
+ }
+
+ /* Don't add duplicated lines. */
+ if (history_len && !strcmp(history[history_len-1], line)) return 0;
+
+ /* Add an heap allocated copy of the line in the history.
+ * If we reached the max length, remove the older line. */
+ linecopy = strdup(line);
+ if (!linecopy) return 0;
+ if (history_len == history_max_len) {
+ free(history[0]);
+ memmove(history,history+1,sizeof(char*)*(history_max_len-1));
+ history_len--;
+ }
+ history[history_len] = linecopy;
+ history_len++;
+ return 1;
+}
+
+/* Set the maximum length for the history. This function can be called even
+ * if there is already some history, the function will make sure to retain
+ * just the latest 'len' elements if the new history length value is smaller
+ * than the amount of items already inside the history. */
+int linenoiseHistorySetMaxLen(int len) {
+ char **new;
+
+ if (len < 1) return 0;
+ if (history) {
+ int tocopy = history_len;
+
+ new = malloc(sizeof(char*)*len);
+ if (new == NULL) return 0;
+
+ /* If we can't copy everything, free the elements we'll not use. */
+ if (len < tocopy) {
+ int j;
+
+ for (j = 0; j < tocopy-len; j++) free(history[j]);
+ tocopy = len;
+ }
+ memset(new,0,sizeof(char*)*len);
+ memcpy(new,history+(history_len-tocopy), sizeof(char*)*tocopy);
+ free(history);
+ history = new;
+ }
+ history_max_len = len;
+ if (history_len > history_max_len)
+ history_len = history_max_len;
+ return 1;
+}
+
+/* Save the history in the specified file. On success 0 is returned
+ * otherwise -1 is returned. */
+int linenoiseHistorySave(const char *filename) {
+ mode_t old_umask = umask(S_IXUSR|S_IRWXG|S_IRWXO);
+ FILE *fp;
+ int j;
+
+ fp = fopen(filename,"w");
+ umask(old_umask);
+ if (fp == NULL) return -1;
+ chmod(filename,S_IRUSR|S_IWUSR);
+ for (j = 0; j < history_len; j++)
+ fprintf(fp,"%s\n",history[j]);
+ fclose(fp);
+ return 0;
+}
+
+/* Load the history from the specified file. If the file does not exist
+ * zero is returned and no operation is performed.
+ *
+ * If the file exists and the operation succeeded 0 is returned, otherwise
+ * on error -1 is returned. */
+int linenoiseHistoryLoad(const char *filename) {
+ FILE *fp = fopen(filename,"r");
+ char buf[LINENOISE_MAX_LINE];
+
+ if (fp == NULL) return -1;
+
+ while (fgets(buf,LINENOISE_MAX_LINE,fp) != NULL) {
+ char *p;
+
+ p = strchr(buf,'\r');
+ if (!p) p = strchr(buf,'\n');
+ if (p) *p = '\0';
+ linenoiseHistoryAdd(buf);
+ }
+ fclose(fp);
+ return 0;
+}
diff --git a/extern/linenoise.h b/extern/linenoise.h
@@ -0,0 +1,73 @@
+/* linenoise.h -- VERSION 1.0
+ *
+ * Guerrilla line editing library against the idea that a line editing lib
+ * needs to be 20,000 lines of C code.
+ *
+ * See linenoise.c for more information.
+ *
+ * ------------------------------------------------------------------------
+ *
+ * Copyright (c) 2010-2014, Salvatore Sanfilippo <antirez at gmail dot com>
+ * Copyright (c) 2010-2013, Pieter Noordhuis <pcnoordhuis at gmail dot 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.
+ */
+
+#ifndef __LINENOISE_H
+#define __LINENOISE_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef struct linenoiseCompletions {
+ size_t len;
+ char **cvec;
+} linenoiseCompletions;
+
+typedef void(linenoiseCompletionCallback)(const char *, linenoiseCompletions *);
+typedef char*(linenoiseHintsCallback)(const char *, int *color, int *bold);
+typedef void(linenoiseFreeHintsCallback)(void *);
+void linenoiseSetCompletionCallback(linenoiseCompletionCallback *);
+void linenoiseSetHintsCallback(linenoiseHintsCallback *);
+void linenoiseSetFreeHintsCallback(linenoiseFreeHintsCallback *);
+void linenoiseAddCompletion(linenoiseCompletions *, const char *);
+
+char *linenoise(const char *prompt);
+void linenoiseFree(void *ptr);
+int linenoiseHistoryAdd(const char *line);
+int linenoiseHistorySetMaxLen(int len);
+int linenoiseHistorySave(const char *filename);
+int linenoiseHistoryLoad(const char *filename);
+void linenoiseClearScreen(void);
+void linenoiseSetMultiLine(int ml);
+void linenoisePrintKeyCodes(void);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __LINENOISE_H */
diff --git a/tisp.1 b/tisp.1
@@ -0,0 +1,35 @@
+.\" x-roff document
+.do mso man.tmac
+.TH tisp 1 "February 2018" "tisp 0.0.0"
+.PP
+.SH NAME
+tisp - tiny lisp
+.PP
+.SH SYNOPSIS
+\fBtisp\fP [\fB-hv\fP] [\fICODE\fP]
+.PP
+.SH DESCRIPTION
+Tiny lisp implementation, still in heavy development, barely even "useable." Designed to be scheme-like, ie very minimalist.
+.PP
+.SH OPTIONS
+.TP
+\fB-h
+\fRPrint help and exit
+.PP
+.TP
+\fB-v
+\fRPrint version info and exit
+.PP
+.SH USAGE
+Run the program from the command line to launch the REPL, type command and press enter to see result. Alternatively you can pass a single command as the first argument to the command line program and see a result instantly.
+.PP
+.SH AUTHOR
+Ed van Bruggen <ed@edryd.org>
+.PP
+.SH SEE ALSO
+See project page at <https://edryd.org/projects/tisp.html>
+.PP
+View source code at <https://github.com/edvb/tisp>
+.PP
+.SH LICENSE
+zlib License
diff --git a/tisp.c b/tisp.c
@@ -0,0 +1,546 @@
+/* See LICENSE file for copyright and license details. */
+#include <ctype.h>
+#include <libgen.h>
+#include <limits.h>
+#include <regex.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "extern/arg.h"
+#include "extern/linenoise.h"
+#include "util.h"
+
+/* defines */
+#define car(P) ((P)->v.p.car)
+#define cdr(P) ((P)->v.p.cdr)
+#define nilp(P) ((P)->t == NIL)
+
+/* typedefs */
+struct Val;
+typedef struct Val *Val;
+
+/* improved interface for a pointer to a string */
+typedef struct Str {
+ char *d;
+} *Str;
+
+typedef enum { false, true } bool;
+
+typedef enum {
+ ERROR_OK,
+ ERROR_SYNTAX
+} Error;
+
+/* fraction */
+typedef struct {
+ int num, den;
+} Ratio;
+
+typedef struct Entry *Entry;
+
+typedef struct Hash {
+ int size, cap;
+ struct Entry {
+ char *key;
+ Val val;
+ } *items;
+ struct Hash *next;
+} *Hash;
+
+/* basic function written in C, not lisp */
+typedef Val (*Prim)(Hash, Val);
+
+/* function written directly in lisp instead of C */
+typedef struct {
+ Val args;
+ Val body;
+ Hash env;
+} Func;
+
+typedef struct {
+ Val car, cdr;
+} Pair;
+
+typedef enum {
+ NIL,
+ BOOLEAN,
+ INTEGER,
+ RATIONAL,
+ STRING,
+ SYMBOL,
+ PRIMITIVE,
+ FUNCTION,
+ PAIR,
+} Type;
+
+struct Val {
+ Type t;
+ union {
+ int i;
+ Ratio r;
+ char *s;
+ Prim pr;
+ Func f;
+ Pair p;
+ } v;
+};
+
+/* functions */
+static void hash_add(Hash ht, char *key, Val val);
+
+Val read_val(Str str);
+Val read_list(Str str);
+
+static void tisp_print(Val v);
+static Val tisp_eval(Hash env, Val v);
+
+/* variables */
+char *argv0;
+
+struct Val nil;
+
+#include "config.h"
+
+static int
+issymbol(char c)
+{
+ return BETWEEN(c, 'a', 'z') || strchr("+-*/", c);
+}
+
+/* TODO skip comments */
+static void
+skip_spaces(Str str) {
+ for (; *str->d && isspace(*str->d); str->d++);
+}
+
+/* return hashed number based on key */
+static uint32_t
+hash(char *key)
+{
+ uint32_t h = 0;
+ char c;
+ while (h < ULONG_MAX && (c = *key++))
+ h = h * 33 + c;
+ return h;
+}
+
+/* create new empty hash table with given capacity */
+static Hash
+hash_new(size_t cap)
+{
+ int i;
+ if (cap < 1) return NULL;
+ Hash ht = emalloc(sizeof(struct Hash));
+ ht->size = 0;
+ ht->cap = cap;
+ ht->items = ecalloc(cap, sizeof(struct Entry));
+ for (i = 0; i < cap; i++)
+ ht->items[i].key = NULL;
+ ht->next = NULL;
+ return ht;
+}
+
+static Entry
+entry_get(Hash ht, char *key)
+{
+ int i = hash(key) % ht->cap;
+ char *s;
+ while ((s = ht->items[i].key)) {
+ if (!strcmp(s, key))
+ break;
+ if (++i == ht->cap)
+ i = 0;
+ }
+ return &ht->items[i];
+}
+
+/* get vale of given key in hash table */
+static Val
+hash_get(Hash ht, char *key)
+{
+ Entry e;
+ for (; ht; ht = ht->next) {
+ e = entry_get(ht, key);
+ if (e->key)
+ return e->val;
+ }
+ return &nil;
+}
+
+/* enlarge the hash table to ensure algorithm's efficiency */
+static void
+hash_grow(Hash ht)
+{
+ if (ht->size < ht->cap / 2)
+ return; /* only need to grow table if it is more than half full */
+ int i;
+ int ocap = ht->cap;
+ Entry oitems = ht->items;
+ ht->cap *= 2;
+ ht->items = ecalloc(ht->cap, sizeof(struct Entry));
+ for (i = 0; i < ht->cap; i++) /* empty the new larger hash table */
+ ht->items[i].key = NULL;
+ for (i = 0; i < ocap; i++) /* repopulate new hash table with old values */
+ if (oitems[i].key)
+ hash_add(ht, oitems[i].key, oitems[i].val);
+ free(oitems);
+}
+
+/* create new key and value pair to the hash table */
+static void
+hash_add(Hash ht, char *key, Val val)
+{
+ Entry e = entry_get(ht, key);
+ e->val = val;
+ if (!e->key) {
+ e->key = key;
+ ht->size++;
+ hash_grow(ht);
+ }
+}
+
+Val
+mk_val(Type t)
+{
+ Val v = emalloc(sizeof(struct Val));
+ v->t = t;
+ return v;
+}
+
+Val
+mk_bool(bool b)
+{
+ Val v = mk_val(BOOLEAN);
+ v->v.i = b;
+ return v;
+}
+
+Val
+mk_int(int i)
+{
+ Val v = mk_val(INTEGER);
+ v->v.i = i;
+ return v;
+}
+
+Val
+mk_string(char *s)
+{
+ Val v = mk_val(STRING);
+ v->v.s = s;
+ return v;
+}
+
+Val
+mk_symbol(char *s)
+{
+ Val v = mk_val(SYMBOL);
+ v->v.s = s;
+ return v;
+}
+
+Val
+mk_prim(Prim pr)
+{
+ Val v = mk_val(PRIMITIVE);
+ v->v.pr = pr;
+ return v;
+}
+
+Val
+mk_pair(Val a, Val b)
+{
+ Val ret = mk_val(PAIR);
+ car(ret) = a;
+ cdr(ret) = b;
+ return ret;
+}
+
+Val
+mk_list(int n, Val *a)
+{
+ int i;
+ Val b = &nil;
+ for (i = n-1; i >= 0; i--)
+ b = mk_pair(a[i], b);
+ return b;
+}
+
+Val
+read_int(Str str)
+{
+ int i = 0;
+ for (; isdigit(*str->d); str->d++)
+ i = i * 10 + *str->d - '0';
+ return mk_int(i);
+}
+
+Val
+read_string(Str str)
+{
+ int len = 0;
+ char *s = ++str->d;
+ for (; *str->d && *str->d++ != '"'; len++);
+ s[len] = '\0';
+ return mk_string(estrdup(s));
+}
+
+Val
+read_symbol(Str str)
+{
+ int len = 0;
+ char *sym = str->d;
+ for (; *str->d && issymbol(*str->d++); len++);
+ sym[len] = '\0';
+ return mk_symbol(estrdup(sym));
+}
+
+Val
+read_list(Str str)
+{
+ int n = 0;
+ Val *a = emalloc(sizeof(Val)), b;
+ str->d++;
+ skip_spaces(str);
+ while (*str->d && *str->d != ')') {
+ a = erealloc(a, (n+1) * sizeof(Val)); /* TODO realloc less */
+ a[n++] = read_val(str);
+ skip_spaces(str);
+ }
+ b = mk_list(n, a);
+ free(a);
+ skip_spaces(str);
+ return b;
+}
+
+Val
+read_val(Str str)
+{
+ skip_spaces(str);
+ if (*str->d == '#') /* TODO check 2nd char */
+ return mk_bool(*(++str->d) == 't' ? true : false);
+ if (isdigit(*str->d)) /* TODO negitive numbers */
+ return read_int(str);
+ if (*str->d == '"') /* TODO fix */
+ return read_string(str);
+ if (issymbol(*str->d))
+ return read_symbol(str);
+ if (*str->d == '(')
+ return read_list(str);
+ return NULL;
+}
+
+char *
+hints(const char *buf, int *color, int *bold)
+{
+ struct { char *match, *hint; int color, bold; } hint[] = {
+ { "(lambda", " (args) (body))", 35, 0 },
+ { "(define", " var exp)", 35, 0 },
+ { NULL, NULL, 0, 0 }
+ };
+ for (int i = 0; hint[i].match; i++) {
+ if (!strcasecmp(buf, hint[i].match)){
+ *color = hint[i].color;
+ *bold = hint[i].bold;
+ return hint[i].hint;
+ }
+ }
+ return NULL;
+}
+
+static Val
+tisp_read(char *cmd)
+{
+ char *line;
+ struct Str str;
+ Val ast;
+
+ if (cmd) {
+ line = estrdup(cmd);
+ } else {
+ if (SHOW_HINTS)
+ linenoiseSetHintsCallback(hints);
+ if (!(line = linenoise("> ")))
+ return NULL;
+ linenoiseHistoryAdd(line);
+ }
+
+ str.d = line;
+ ast = read_val(&str);
+ free(line);
+
+ return ast;
+}
+
+static Val
+eval_pair(Hash env, Val v)
+{
+ int cap = 0, size = 0;
+ Val *new = emalloc(sizeof(Val));
+ while (!nilp(v)) {
+ new[cap++] = tisp_eval(env, car(v));
+ if (cap == size) {
+ size *= 2;
+ v = erealloc(v, size*sizeof(Val));
+ }
+ v = cdr(v);
+ }
+ Val ret = mk_list(cap, new);
+ free(new);
+ return ret;
+}
+
+static Val
+tisp_eval(Hash env, Val v)
+{
+ Val f;
+ switch (v->t) {
+ case NIL:
+ case BOOLEAN:
+ case INTEGER:
+ case RATIONAL:
+ case STRING:
+ return v;
+ case SYMBOL:
+ return hash_get(env, v->v.s);
+ case PAIR:
+ f = tisp_eval(env, car(v));
+ if (f->t != PRIMITIVE)
+ die(1, "%s: Attempt to eval non primitive", argv0);
+ return (*f->v.pr)(env, eval_pair(env, cdr(v)));
+ default: break;
+ }
+ return v;
+}
+
+/* TODO return str for error msgs? */
+static void
+tisp_print(Val v)
+{
+ switch (v->t) {
+ case NIL:
+ printf("()");
+ break;
+ case BOOLEAN:
+ printf(v->v.i ? "#t" : "#f");
+ break;
+ case INTEGER:
+ printf("%d", v->v.i);
+ break;
+ case RATIONAL:
+ printf("%d/%d", v->v.r.num, v->v.r.den);
+ break;
+ case STRING:
+ printf("\"%s\"", v->v.s);
+ break;
+ case SYMBOL:
+ printf(v->v.s);
+ break;
+ case FUNCTION:
+ printf("(lambda ");
+ tisp_print(v->v.f.args);
+ putchar(' ');
+ tisp_print(v->v.f.body);
+ putchar(')');
+ break;
+ case PAIR:
+ putchar('(');
+ tisp_print(car(v));
+ v = cdr(v);
+ while (!nilp(v)) {
+ if (v->t == PAIR) {
+ putchar(' ');
+ tisp_print(car(v));
+ v = cdr(v);
+ } else {
+ puts(" . ");
+ tisp_print(v);
+ break;
+ }
+ }
+ putchar(')');
+ break;
+ default:
+ printf("%s: Could not print value type [%d]", argv0, v->t);
+ }
+}
+
+static Val
+add(Hash env, Val args)
+{
+ Val v;
+ int i = 0;
+ for (v = args; !nilp(v); v = cdr(v))
+ i += car(v)->v.i;
+ return mk_int(i);
+}
+
+static Hash
+init_env(void)
+{
+ Hash h = hash_new(64);
+ hash_add(h, "+", mk_prim(add));
+ return h;
+}
+
+void
+val_free(Val v)
+{
+ if (v->t == PAIR) {
+ val_free(car(v));
+ val_free(cdr(v));
+ }
+ if (v->t != NIL)
+ free(v);
+}
+
+static void
+usage(const int eval)
+{
+ die(eval, "usage: %s [-hv] [CODE]", argv0);
+}
+
+int
+main(int argc, char *argv[])
+{
+ ARGBEGIN {
+ case 'h':
+ usage(0);
+ case 'v':
+ printf("%s v%s (c) 2017-2018 Ed van Bruggen\n", argv0, VERSION);
+ return 0;
+ default:
+ usage(1);
+ } ARGEND;
+
+ char *str = NULL;
+ Val v;
+ Hash env = init_env();
+
+ nil.t = NIL;
+
+ if (argc > 0 && argv[0][0] == '(')
+ str = argv[0];
+
+ while ((v = tisp_read(str))) {
+ v = tisp_eval(env, v);
+
+ tisp_print(v);
+ putchar('\n');
+ val_free(v);
+ if (str) break;
+ }
+
+ for (; env; env = env->next) {
+ for (int i = 0; i < env->cap; i++)
+ if (env->items[i].key)
+ val_free(env->items[i].val);
+ free(env->items);
+ free(env);
+ }
+
+ return 0;
+}
diff --git a/util.c b/util.c
@@ -0,0 +1,75 @@
+/* See LICENSE file for copyright and license details. */
+#include <assert.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "util.h"
+
+void *
+ecalloc(size_t nmemb, size_t size)
+{
+ void *p;
+
+ if (!(p = calloc(nmemb, size)))
+ die(1, "calloc:");
+
+ return p;
+}
+
+void *
+emalloc(size_t size)
+{
+ void *p;
+
+ if (!(p = malloc(size)))
+ die(1, "malloc:");
+
+ return p;
+}
+
+void *
+erealloc(void *p, size_t size)
+{
+ if (!(p = realloc(p, size)))
+ die(1, "realloc:");
+
+ return p;
+}
+
+char *
+estrdup(char *s)
+{
+ if (!(s = strdup(s)))
+ die(1, "strdup:");
+
+ return s;
+}
+
+void
+efree(void *p)
+{
+ if (p)
+ free(p);
+}
+
+void
+die(int eval, const char *fmt, ...)
+{
+ va_list ap;
+
+ va_start(ap, fmt);
+ vfprintf(stderr, fmt, ap);
+ va_end(ap);
+
+ if (fmt[0] && fmt[strlen(fmt)-1] == ':') {
+ fputc(' ', stderr);
+ perror(NULL);
+ } else {
+ fputc('\n', stderr);
+ }
+
+ if (eval > -1)
+ exit(eval);
+}
diff --git a/util.h b/util.h
@@ -0,0 +1,14 @@
+/* See LICENSE file for copyright and license details. */
+
+#define MAX(A, B) ((A) > (B) ? (A) : (B))
+#define MIN(A, B) ((A) < (B) ? (A) : (B))
+#define BETWEEN(X, A, B) ((A) <= (X) && (X) <= (B))
+#define LEN(X) (sizeof(X) / sizeof((X)[0]))
+
+void *ecalloc(size_t nmemb, size_t size);
+void *emalloc(size_t size);
+void *erealloc(void *p, size_t size);
+char *estrdup(char *s);
+void efree(void *p);
+
+void die(int eval, const char *fmt, ...);
