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-rw-r--r--.gitignore1
-rw-r--r--Makefile27
-rw-r--r--atom.c100
-rw-r--r--atom.h57
-rw-r--r--eval.c291
-rw-r--r--eval.h7
-rw-r--r--linenoise.c1090
-rw-r--r--linenoise.h66
-rw-r--r--list.c99
-rw-r--r--list.h19
-rw-r--r--parse.c184
-rw-r--r--parse.h12
-rw-r--r--repl.c27
-rw-r--r--test_util.h93
-rw-r--r--tokens.c188
-rw-r--r--tokens.h24
-rw-r--r--tst_main.c2
17 files changed, 2287 insertions, 0 deletions
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..5761abc
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+*.o
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..f53a3f0
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,27 @@
+SOURCES = parse.c list.c atom.c eval.c tokens.c
+OBJECTS = $(SOURCES:.c=.o)
+
+CFLAGS = -Wall -g
+LDFLAGS =
+
+CC = gcc
+LD = gcc
+
+# ifneq ($(BUILD_TEST),)
+
+test: CFLAGS := $(CFLAGS) -DBUILD_TEST
+test: $(OBJECTS) tst_main.o
+ $(LD) $(LDFLAGS) -o $@ $^
+
+# else
+
+repl: $(OBJECTS) repl.o linenoise.o
+ $(LD) $(LDFLAGS) -o $@ $^
+
+# endif
+
+.PHONY: clean
+clean:
+ rm -f *.o
+ rm -f test
+ rm -f repl
diff --git a/atom.c b/atom.c
new file mode 100644
index 0000000..73ecd7e
--- /dev/null
+++ b/atom.c
@@ -0,0 +1,100 @@
+#include "atom.h"
+#include "list.h"
+
+#include <stdlib.h>
+#include <string.h>
+
+struct atom true_atom;
+struct atom false_atom;
+struct atom nil_atom;
+
+struct atom *atom_new(char type)
+{
+ struct atom *atom = calloc(1, sizeof(*atom));
+ atom->type = type;
+ return atom;
+}
+
+struct atom *atom_new_int(long l)
+{
+ struct atom *atom = atom_new(ATOM_INT);
+ atom->l = l;
+ return atom;
+}
+
+struct atom *atom_new_str(const char *str, int len)
+{
+ struct atom *atom = atom_new(ATOM_STR);
+ atom->str.str = strndup(str, len);
+ atom->str.len = len;
+ return atom;
+}
+
+struct atom *atom_new_sym(const char *sym, int len)
+{
+ struct atom *atom = atom_new_str(sym, len);
+ atom->type = ATOM_SYMBOL;
+ return atom;
+}
+
+struct atom *atom_new_list(struct list *list)
+{
+ struct atom *atom = atom_new(ATOM_LIST);
+ atom->list = list;
+ return atom;
+}
+
+#ifdef BUILD_TEST
+
+#include "test_util.h"
+
+TEST(atom_new)
+{
+ struct atom *atom = atom_new(ATOM_STR);
+ ASSERT_TRUE(atom != NULL);
+ ASSERT_EQ(ATOM_STR, atom->type);
+}
+
+TEST(atom_new_int)
+{
+ struct atom *atom = atom_new_int(42);
+ ASSERT_TRUE(atom != NULL);
+ ASSERT_EQ(42, atom->l);
+}
+
+TEST(atom_new_str)
+{
+ struct atom *atom = atom_new_str("foobar", 6);
+ ASSERT_TRUE(atom != NULL);
+ ASSERT_STREQ("foobar", atom->str.str);
+
+ atom = atom_new_str("foobar", 3);
+ ASSERT_TRUE(atom != NULL);
+ ASSERT_STREQ("foo", atom->str.str);
+
+ ASSERT_EQ(ATOM_STR, atom->type);
+}
+
+TEST(atom_new_sym)
+{
+ struct atom *atom = atom_new_sym("foobar", 6);
+ ASSERT_TRUE(atom != NULL);
+ ASSERT_STREQ("foobar", atom->str.str);
+
+ atom = atom_new_sym("foobar", 3);
+ ASSERT_TRUE(atom != NULL);
+ ASSERT_STREQ("foo", atom->str.str);
+
+ ASSERT_EQ(ATOM_SYMBOL, atom->type);
+}
+
+TEST(atom_new_list)
+{
+ struct list list;
+ struct atom *atom = atom_new_list(&list);
+ ASSERT_TRUE(atom != NULL);
+ ASSERT_EQ(&list, atom->list);
+ ASSERT_EQ(ATOM_LIST, atom->type);
+}
+
+#endif
diff --git a/atom.h b/atom.h
new file mode 100644
index 0000000..3b716fa
--- /dev/null
+++ b/atom.h
@@ -0,0 +1,57 @@
+#ifndef ATOM_H
+#define ATOM_H
+
+#define LIST_GET_ATOM(LIST) ((struct atom *) (LIST)->data)
+
+#define ATOM_TYPE(LIST) ((LIST_GET_ATOM(LIST))->type)
+#define IS_INT(LIST) ((ATOM_TYPE(LIST)) == ATOM_INT)
+#define IS_STR(LIST) ((ATOM_TYPE(LIST)) == ATOM_STR)
+#define IS_SYM(LIST) ((ATOM_TYPE(LIST)) == ATOM_SYMBOL)
+#define IS_LIST(LIST) ((ATOM_TYPE(LIST)) == ATOM_LIST)
+
+#define IS_TRUE(LIST) (LIST_GET_ATOM(LIST) == &true_atom)
+#define IS_FALSE(LIST) (LIST_GET_ATOM(LIST) == &false_atom)
+#define IS_NIL(LIST) (LIST_GET_ATOM(LIST) == &nil_atom)
+
+#define CAR(LIST) LIST
+
+#define CDR(LIST) ((LIST) != NULL ? (LIST)->next : NULL)
+#define CDDR(LIST) CDR(CDR(LIST))
+
+enum
+{
+ ATOM_NIL,
+ ATOM_INT,
+ ATOM_STR,
+ ATOM_SYMBOL,
+ ATOM_LIST
+};
+
+struct atom
+{
+ union
+ {
+ long l;
+ struct
+ {
+ char *str;
+ int len;
+ } str;
+ struct list *list;
+ };
+ char type;
+};
+
+struct list;
+
+struct atom *atom_new(char type);
+struct atom *atom_new_int(long l);
+struct atom *atom_new_str(const char *str, int len);
+struct atom *atom_new_sym(const char *sym, int len);
+struct atom *atom_new_list(struct list *list);
+
+extern struct atom true_atom;
+extern struct atom false_atom;
+extern struct atom nil_atom;
+
+#endif
diff --git a/eval.c b/eval.c
new file mode 100644
index 0000000..43e1e05
--- /dev/null
+++ b/eval.c
@@ -0,0 +1,291 @@
+#include "eval.h"
+#include "list.h"
+#include "atom.h"
+#include "parse.h"
+
+#include <string.h>
+
+static int atom_cmp(struct list *a, struct list *b)
+{
+ if (ATOM_TYPE(a) != ATOM_TYPE(b))
+ return 0;
+
+ if (IS_TRUE(a) && !IS_TRUE(b))
+ return 0;
+
+ if (IS_FALSE(a) && !IS_FALSE(b))
+ return 0;
+
+ if (IS_TRUE(b) && !IS_TRUE(a))
+ return 0;
+
+ if (IS_FALSE(b) && !IS_FALSE(a))
+ return 0;
+
+ if (IS_NIL(a) && !IS_NIL(b))
+ return 0;
+
+ if (IS_NIL(b) && !IS_NIL(a))
+ return 0;
+
+ int result = 1;
+
+ switch (ATOM_TYPE(a))
+ {
+ case ATOM_INT:
+ if (LIST_GET_ATOM(a)->l != LIST_GET_ATOM(b)->l)
+ result = 0;
+ break;
+
+ case ATOM_STR:
+ case ATOM_SYMBOL:
+ if (strcmp(LIST_GET_ATOM(a)->str.str, LIST_GET_ATOM(b)->str.str) != 0)
+ result = 0;
+ break;
+
+ case ATOM_LIST:
+ {
+ struct list *ai = LIST_GET_ATOM(a)->list;
+ struct list *bi = LIST_GET_ATOM(b)->list;
+
+ while (ai && bi)
+ {
+ if (!atom_cmp(ai, bi))
+ {
+ result = 0;
+ break;
+ }
+
+ ai = ai->next;
+ bi = bi->next;
+ }
+
+ if (ai != NULL || bi != NULL)
+ result = 0;
+
+ break;
+ }
+ }
+
+ return result;
+}
+
+struct list *eval(struct list *list)
+{
+ if (!IS_LIST(list))
+ return list;
+
+ struct list *l = LIST_GET_ATOM(list)->list;
+
+ if (IS_SYM(l))
+ {
+ const char *sym = LIST_GET_ATOM(l)->str.str;
+
+ if (strcmp(sym, "quote") == 0)
+ {
+ return l->next;
+ }
+ else if (strcmp(sym, "atom") == 0)
+ {
+ if (IS_LIST(l->next))
+ {
+ return list_append(NULL, &false_atom);
+ }
+ else
+ {
+ return list_append(NULL, &true_atom);
+ }
+ }
+ else if (strcmp(sym, "eq") == 0)
+ {
+ struct list *a = l->next;
+ if (!a)
+ return list_append(NULL, &false_atom);
+
+ struct list *b = a->next;
+ if (!b)
+ return list_append(NULL, &false_atom);
+
+ a = eval(a);
+ b = eval(b);
+
+ if (atom_cmp(a, b))
+ return list_append(NULL, &true_atom);
+
+ return list_append(NULL, &false_atom);
+ }
+ else if (strncmp(sym, "+", 1) == 0 ||
+ strncmp(sym, "-", 1) == 0 ||
+ strncmp(sym, "/", 1) == 0 ||
+ strncmp(sym, "*", 1) == 0)
+ {
+ struct list *oper = CAR(l);
+ struct list *a = CDR(oper);
+ struct list *b = CDDR(oper);
+
+ if (!a || !b)
+ return list_append(NULL, &nil_atom);
+
+ a = eval(a);
+ b = eval(b);
+
+ if (!(ATOM_TYPE(a) == ATOM_TYPE(b) && ATOM_TYPE(a) == ATOM_INT))
+ return list_append(NULL, &nil_atom);
+
+ long numa = LIST_GET_ATOM(a)->l;
+ long numb = LIST_GET_ATOM(b)->l;
+ long numr;
+
+ switch (*sym)
+ {
+ case '+':
+ numr = numa + numb;
+ break;
+ case '-':
+ numr = numa - numb;
+ break;
+ case '/':
+ numr = numa / numb;
+ break;
+ case '*':
+ numr = numa * numb;
+ break;
+ }
+
+ struct list *result = list_append(NULL, atom_new_int(numr));
+
+ return result;
+ }
+ else if (strncmp(sym, ">", 1) == 0)
+ {
+ struct list *oper = CAR(l);
+ struct list *a = CDR(oper);
+ struct list *b = CDDR(oper);
+
+ if (!a || !b)
+ return list_append(NULL, &nil_atom);
+
+ a = eval(a);
+ b = eval(b);
+
+ if (!(ATOM_TYPE(a) == ATOM_TYPE(b) && ATOM_TYPE(a) == ATOM_INT))
+ return list_append(NULL, &nil_atom);
+
+ long numa = LIST_GET_ATOM(a)->l;
+ long numb = LIST_GET_ATOM(b)->l;
+
+ if (numa > numb)
+ return list_append(NULL, &true_atom);
+ else
+ return list_append(NULL, &false_atom);
+ }
+ else if (strcmp(sym, "if") == 0)
+ {
+ struct list *predicate = CDR(l);
+ struct list *true_case = CDR(predicate);
+ struct list *false_case = CDR(true_case);
+
+ if (!predicate || !true_case || !false_case)
+ return list_append(NULL, &nil_atom);
+
+ predicate = eval(predicate);
+
+ if (IS_TRUE(predicate))
+ return eval(true_case);
+ else
+ return eval(false_case);
+ }
+ }
+ else if (IS_LIST(l))
+ {
+ return eval(l);
+ }
+
+ return list_append(NULL, &nil_atom);
+}
+
+struct list *eval_str(const char *str)
+{
+ struct list *result;
+ int pos = 0;
+
+ result = eval(parse(str, &pos));
+
+ return result;
+}
+
+#ifdef BUILD_TEST
+
+#include "test_util.h"
+
+TEST(eval)
+{
+ struct list *result;
+ int pos;
+
+#define EVAL(EXPR) \
+ pos = 0; \
+ result = eval(parse((EXPR), &pos))
+
+#define ARITHMETIC_TEST(EXPR, RESULT) \
+ EVAL(EXPR); \
+ ASSERT_EQ(ATOM_INT, ATOM_TYPE(result)); \
+ ASSERT_EQ(RESULT, LIST_GET_ATOM(result)->l)
+
+ ARITHMETIC_TEST("(+ 1 2)", 3);
+ ARITHMETIC_TEST("(- 5 10)", -5);
+ ARITHMETIC_TEST("(/ 42 2)", 21);
+ ARITHMETIC_TEST("(* 5 10)", 50);
+ ARITHMETIC_TEST("(* (* 2 (+ 1 1)) 2)", 8);
+
+#undef ARITHMETIC_TEST
+
+#define EQ_TEST(EXPR, RESULT) \
+ EVAL(EXPR); \
+ ASSERT_EQ(result, RESULT)
+
+#define EQ_TEST_T(EXPR) EVAL(EXPR); ASSERT(IS_TRUE(result))
+#define EQ_TEST_F(EXPR) EVAL(EXPR); ASSERT(IS_FALSE(result))
+
+ EQ_TEST_T("(eq 1 1)");
+ EQ_TEST_T("(eq (+ 1 1) 2)");
+ EQ_TEST_T("(eq (quote (1 2 3)) (quote (1 2 3)))");
+
+ EQ_TEST_T("(eq \"eka\" \"eka\"");
+ EQ_TEST_F("(eq \"eka\" eka)");
+ EQ_TEST_F("(eq \"eka\" 100)");
+ EQ_TEST_F("(eq \"eka\" \"toka\"");
+
+ EQ_TEST_T("(eq eka eka)");
+ EQ_TEST_F("(eq eka toka)");
+
+ EQ_TEST_F("(eq 1 2)");
+ EQ_TEST_F("(eq 1 (- 1 1))");
+ EQ_TEST_F("(eq (quote (1)) (quote (1 2 3)))");
+
+ EQ_TEST_T("(eq (quote (1 2)) '(1 2))");
+ EQ_TEST_T("(eq 'bar 'bar)");
+ EQ_TEST_F("(eq 'foo 'bar)");
+ EQ_TEST_T("(eq (quote bar) 'bar)");
+ EQ_TEST_F("(eq (quote foo) 'bar)");
+
+ EQ_TEST_F("(> 1 2)");
+ EQ_TEST_T("(> 2 1)");
+
+#undef EQ_TEST_F
+#undef EQ_TEST_T
+#undef EQ_TEST
+
+ EVAL("(if #t 1 2)");
+ ASSERT_EQ(1, LIST_GET_ATOM(result)->l);
+
+ EVAL("(if #t (+ 1 1) (* 2 2))");
+ ASSERT_EQ(2, LIST_GET_ATOM(result)->l);
+
+ EVAL("(if #f (+ 1 1) (* 2 2))");
+ ASSERT_EQ(4, LIST_GET_ATOM(result)->l);
+
+#undef EVAL
+}
+
+#endif /* BUILD_TEST */
diff --git a/eval.h b/eval.h
new file mode 100644
index 0000000..d22355b
--- /dev/null
+++ b/eval.h
@@ -0,0 +1,7 @@
+#ifndef EVAL_H
+#define EVAL_H
+
+struct list *eval(struct list *list);
+struct list *eval_str(const char *str);
+
+#endif
diff --git a/linenoise.c b/linenoise.c
new file mode 100644
index 0000000..aef5cdd
--- /dev/null
+++ b/linenoise.c
@@ -0,0 +1,1090 @@
+/* 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) 2010-2013, 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.
+ *
+ * CHA (Cursor Horizontal Absolute)
+ * Sequence: ESC [ n G
+ * Effect: moves cursor to column n
+ *
+ * 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 of n chars
+ *
+ * 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.
+ *
+ * The following are used to clear the screen: ESC [ H ESC [ 2 J
+ * This is actually composed of two sequences:
+ *
+ * cursorhome
+ * Sequence: ESC [ H
+ * Effect: moves the cursor to upper left corner
+ *
+ * ED2 (Clear entire screen)
+ * 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/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 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;
+}
+
+/* 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);
+}
+
+/* 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,"\x1b[0G");
+ abAppend(&ab,seq,strlen(seq));
+ /* Write the prompt and the current buffer content */
+ abAppend(&ab,l->prompt,strlen(l->prompt));
+ abAppend(&ab,buf,len);
+ /* Erase to right */
+ snprintf(seq,64,"\x1b[0K");
+ abAppend(&ab,seq,strlen(seq));
+ /* Move cursor to original position. */
+ snprintf(seq,64,"\x1b[0G\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 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,"\x1b[0G\x1b[0K\x1b[1A");
+ abAppend(&ab,seq,strlen(seq));
+ }
+
+ /* Clean the top line. */
+ lndebug("clear");
+ snprintf(seq,64,"\x1b[0G\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);
+
+ /* 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,"\x1b[0G");
+ 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. */
+ lndebug("set col %d", 1+((plen+(int)l->pos) % (int)l->cols));
+ snprintf(seq,64,"\x1b[%dG", 1+((plen+(int)l->pos) % (int)l->cols));
+ 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) /* || mlmode */) {
+ /* 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]);
+ 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 of 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("\x1b[0G"); /* 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 (!isatty(STDIN_FILENO)) {
+ /* Not a tty: read from file / pipe. */
+ if (fgets(buf, buflen, stdin) == NULL) return -1;
+ count = strlen(buf);
+ if (count && buf[count-1] == '\n') {
+ count--;
+ buf[count] = '\0';
+ }
+ } else {
+ /* Interactive editing. */
+ if (enableRawMode(STDIN_FILENO) == -1) return -1;
+ count = linenoiseEdit(STDIN_FILENO, STDOUT_FILENO, buf, buflen, prompt);
+ disableRawMode(STDIN_FILENO);
+ printf("\n");
+ }
+ return count;
+}
+
+/* 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 (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);
+ }
+}
+
+/* ================================ 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) {
+ FILE *fp = fopen(filename,"w");
+ int j;
+
+ if (fp == NULL) return -1;
+ 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/linenoise.h b/linenoise.h
new file mode 100644
index 0000000..e22ebd3
--- /dev/null
+++ b/linenoise.h
@@ -0,0 +1,66 @@
+/* linenoise.h -- 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, Salvatore Sanfilippo <antirez at gmail dot com>
+ * Copyright (c) 2010, 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 *);
+void linenoiseSetCompletionCallback(linenoiseCompletionCallback *);
+void linenoiseAddCompletion(linenoiseCompletions *, const char *);
+
+char *linenoise(const char *prompt);
+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/list.c b/list.c
new file mode 100644
index 0000000..58510ac
--- /dev/null
+++ b/list.c
@@ -0,0 +1,99 @@
+#include "list.h"
+
+#include <stdlib.h>
+#include <string.h>
+
+void list_init(struct list *list)
+{
+ memset(list, 0, sizeof(*list));
+}
+
+struct list *list_new(void *data)
+{
+ struct list *list = calloc(1, sizeof(*list));
+ list->data = data;
+ return list;
+}
+
+struct list *list_append(struct list *list, void *data)
+{
+ if (list == NULL)
+ {
+ return list_new(data);
+ }
+
+ struct list *last = list_get_last(list);
+ list = list_new(data);
+ last->next = list;
+
+ return list;
+}
+
+struct list *list_get_last(struct list *list)
+{
+ while (list && list->next)
+ list = list->next;
+ return list;
+}
+
+struct list *list_pop_front(struct list **list)
+{
+ struct list *popped = *list;
+
+ if (!popped)
+ return NULL;
+
+ *list = popped->next;
+ popped->next = NULL;
+
+ return popped;
+}
+
+void list_free(struct list *list, list_free_cb free_cb, void *userdata)
+{
+ struct list *popped;
+
+ while ((popped = list_pop_front(&list)) != NULL)
+ {
+ if (free_cb)
+ free_cb(popped->data, userdata);
+ free(popped);
+ }
+}
+
+#ifdef BUILD_TEST
+
+#include "test_util.h"
+
+TEST(list_init)
+{
+
+}
+
+TEST(list_new)
+{
+
+}
+
+TEST(list_append)
+{
+
+}
+
+TEST(list_get_last)
+{
+
+}
+
+TEST(list_pop_front)
+{
+
+}
+
+TEST(list_free)
+{
+
+}
+
+
+#endif
diff --git a/list.h b/list.h
new file mode 100644
index 0000000..ea82440
--- /dev/null
+++ b/list.h
@@ -0,0 +1,19 @@
+#ifndef LIST_H
+#define LIST_H
+
+struct list
+{
+ void *data;
+ struct list *next;
+};
+
+typedef void (*list_free_cb)(void *data, void *userdata);
+
+void list_init(struct list *list);
+struct list *list_new(void *data);
+struct list *list_append(struct list *list, void *data);
+struct list *list_get_last(struct list *list);
+struct list *list_pop_front(struct list **list);
+void list_free(struct list *list, list_free_cb free_cb, void *userdata);
+
+#endif
diff --git a/parse.c b/parse.c
new file mode 100644
index 0000000..b5101e1
--- /dev/null
+++ b/parse.c
@@ -0,0 +1,184 @@
+#include "parse.h"
+#include "tokens.h"
+#include "list.h"
+#include "atom.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <ctype.h>
+
+void print_list(struct list *list, int level)
+{
+ while (list)
+ {
+ struct atom *atom = LIST_GET_ATOM(list);
+
+ if (IS_TRUE(list))
+ {
+ printf("#t");
+ }
+ else if (IS_FALSE(list))
+ {
+ printf("#f");
+ }
+ else if (IS_NIL(list))
+ {
+ printf("nil");
+ }
+ else
+ {
+ switch (atom->type)
+ {
+ case ATOM_SYMBOL:
+ printf("%.*s", atom->str.len, atom->str.str);
+ break;
+
+ case ATOM_LIST:
+ printf("(");
+ print_list(atom->list, level+1);
+ printf(")");
+ break;
+
+ case ATOM_STR:
+ printf("\"%.*s\"", atom->str.len, atom->str.str);
+ break;
+
+ case ATOM_INT:
+ printf("%ld", atom->l);
+ }
+ }
+
+ if (list->next)
+ printf(" ");
+
+ list = list->next;
+ }
+
+ if (level == 0)
+ printf("\n");
+}
+
+int parse_next(const char *src, int *pos, struct atom **result)
+{
+ struct token token;
+ int rc;
+
+ if ((rc = get_next_token(src, pos, &token)) > 0)
+ {
+ switch (token.type)
+ {
+ case TOKEN_INT:
+ *result = atom_new_int(strtol(token.s, NULL, 10));
+ break;
+
+ case TOKEN_STR:
+ *result = atom_new_str(token.s, token.len);
+ break;
+
+ case TOKEN_SYMBOL:
+ if (strncmp(token.s, "#t", 2) == 0)
+ *result = &true_atom;
+ else if (strncmp(token.s, "#f", 2) == 0)
+ *result = &false_atom;
+ else
+ *result = atom_new_sym(token.s, token.len);
+ break;
+
+ case TOKEN_LPAREN:
+ {
+ struct list *l = parse(src, pos);
+ *result = atom_new_list(l);
+ break;
+ }
+
+ case TOKEN_RPAREN:
+ return -2;
+
+ case TOKEN_QUOTE:
+ {
+ struct atom *quoted = NULL;
+
+ parse_next(src, pos, &quoted);
+
+ struct list *qlist = list_append(NULL,
+ atom_new_sym("quote", 5));
+
+ list_append(qlist, quoted);
+
+ *result = atom_new_list(qlist);
+
+ break;
+ }
+ }
+ }
+
+ return rc;
+}
+
+struct list *parse(const char *src, int *pos)
+{
+ int rc;
+ struct atom *atom;
+ struct list root, *last = &root;
+
+ list_init(last);
+
+ while ((rc = parse_next(src, pos, &atom)))
+ {
+ if (rc < 0)
+ break;
+
+ last = list_append(last, atom);
+ }
+
+ if (rc < 0 && rc != -2)
+ return NULL;
+
+ return root.next;
+}
+
+#ifdef BUILD_TEST
+
+#include "test_util.h"
+
+static const char *test_src_fact =
+ "(define fact\n"
+ " ;; Factorial function\n"
+ " (lambda (n)\n"
+ " (if (eq n 0)\n"
+ " 1 ; Factorial of 0 is 1\n"
+ " (* n (fact (- n 1))))))\n"
+ "(fact 5) ;; this should evaluate to 120\n";
+
+#define ASSERT_SYM(LIST, SYM) \
+ ASSERT_TRUE(IS_SYM(LIST)); \
+ ASSERT_STREQ(SYM, LIST_GET_ATOM(LIST)->str.str)
+
+TEST(test_parse)
+{
+ int pos = 0;
+ struct list *list;
+
+ list = parse(test_src_fact, &pos);
+
+ ASSERT_TRUE(list != NULL);
+
+ ASSERT_TRUE(IS_LIST(list));
+
+ list = LIST_GET_ATOM(list)->list;
+
+ ASSERT_TRUE(list != NULL);
+ ASSERT_SYM(list, "define");
+
+ list = list->next;
+
+ ASSERT_TRUE(list != NULL);
+ ASSERT_SYM(list, "fact");
+
+ list = list->next;
+
+ ASSERT_TRUE(list != NULL);
+}
+
+#endif
diff --git a/parse.h b/parse.h
new file mode 100644
index 0000000..94d6fa8
--- /dev/null
+++ b/parse.h
@@ -0,0 +1,12 @@
+#ifndef PARSER_H
+#define PARSER_H
+
+struct atom;
+struct list;
+
+int parse_next(const char *src, int *pos, struct atom **result);
+struct list *parse(const char *src, int *pos);
+
+void print_list(struct list *list, int level);
+
+#endif
diff --git a/repl.c b/repl.c
new file mode 100644
index 0000000..c9ddb6a
--- /dev/null
+++ b/repl.c
@@ -0,0 +1,27 @@
+#include <stdlib.h>
+#include <stdio.h>
+
+#include "parse.h"
+#include "eval.h"
+#include "list.h"
+#include "linenoise.h"
+
+int main(int argc, char **argv)
+{
+ char *line;
+
+ linenoiseSetMultiLine(0);
+
+ while ((line = linenoise("> ")) != NULL)
+ {
+ linenoiseHistoryAdd(line);
+
+ struct list *result = eval_str(line);
+
+ print_list(result, 0);
+
+ free(line);
+ }
+
+ return 0;
+}
diff --git a/test_util.h b/test_util.h
new file mode 100644
index 0000000..1ebf696
--- /dev/null
+++ b/test_util.h
@@ -0,0 +1,93 @@
+#ifndef TEST_UTIL_H
+#define TEST_UTIL_H
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#ifdef _MSC_VER
+
+#define CCALL __cdecl
+#pragma section(".CRT$XCU",read)
+#define INITIALIZER(f) \
+ static void __cdecl f(void); \
+ __declspec(allocate(".CRT$XCU")) void (__cdecl*f##_)(void) = f; \
+ static void __cdecl f(void)
+
+#elif defined(__GNUC__)
+
+#define CCALL
+#define INITIALIZER(f) \
+ static void f(void) __attribute__((constructor)); \
+ static void f(void)
+
+#endif
+
+// __attribute__((constructor)) static void test_##NAME##_init()
+
+#define TEST(NAME) \
+ static void test_##NAME(); \
+ void test_util_add_test(const char *name, void (*func)()); \
+ INITIALIZER(test_##NAME##_init) \
+ { \
+ test_util_add_test(#NAME, &test_##NAME); \
+ } \
+ static void test_##NAME()
+
+#define TEST_MAIN() \
+ typedef void (*test_func)(); \
+ struct test_def { \
+ const char *name; \
+ test_func func; \
+ struct test_def *next; \
+ }; \
+ static struct test_def test_defs; \
+ void test_util_add_test(const char *name, void (*func)()) \
+ { \
+ struct test_def *def = calloc(1, sizeof(*def)); \
+ struct test_def *last = &test_defs; \
+ while (last && last->next) last = last->next; \
+ last->next = def; \
+ def->name = strdup(name); \
+ def->func = func; \
+ } \
+ int main() \
+ { \
+ struct test_def *def = test_defs.next; \
+ while (def) \
+ { \
+ printf("running test %s\n", def->name); \
+ def->func(); \
+ def = def->next; \
+ } \
+ return 0; \
+ }
+
+#define ASSERT(X) \
+ do { \
+ if (!(X)) { \
+ fprintf(stderr, "assertion %s failed at %s:%d\n", \
+ #X, __FILE__, __LINE__); \
+ exit(1); \
+ } \
+ } while (0)
+
+#define ASSERT_MSG(X, FMT, ...) \
+ do { \
+ if (!(X)) { \
+ fprintf(stderr, "assertion %s failed at %s:%d (" FMT ")\n", \
+ #X, __FILE__, __LINE__, ##__VA_ARGS__); \
+ exit(1); \
+ } \
+ } while (0)
+
+#define ASSERT_TRUE(X) ASSERT(X)
+#define ASSERT_FALSE(X) ASSERT(!(X))
+
+#define ASSERT_EQ(EXPECTED, ACTUAL) ASSERT(((EXPECTED) == (ACTUAL)))
+#define ASSERT_NEQ(EXPECTED, ACTUAL) ASSERT(((EXPECTED) != (ACTUAL)))
+
+#define ASSERT_STREQ(EXPECTED, ACTUAL) ASSERT(strcmp((EXPECTED), (ACTUAL)) == 0)
+#define ASSERT_STREQ_N(EXPECTED, ACTUAL, N) ASSERT(strncmp((EXPECTED), (ACTUAL), (N)) == 0)
+
+#endif
diff --git a/tokens.c b/tokens.c
new file mode 100644
index 0000000..d249393
--- /dev/null
+++ b/tokens.c
@@ -0,0 +1,188 @@
+#include "tokens.h"
+
+#include <ctype.h>
+
+int get_next_token(const char *src, int *pos, struct token *token)
+{
+ char c;
+
+start:
+
+ while (isspace(src[*pos]))
+ {
+ *pos += 1;
+ }
+
+ c = src[*pos];
+
+ if (!c)
+ return 0;
+
+ if (c == ';')
+ {
+ *pos += 1;
+ while (src[*pos] != '\n')
+ {
+ *pos += 1;
+ }
+
+ goto start;
+ }
+
+ if (c == '(')
+ {
+ token->type = TOKEN_LPAREN;
+ token->s = &src[*pos];
+ token->len = 1;
+ *pos += 1;
+ }
+ else if (c == ')')
+ {
+ token->type = TOKEN_RPAREN;
+ token->s = &src[*pos];
+ token->len = 1;
+ *pos += 1;
+ }
+ else if (c == '.')
+ {
+ token->type = TOKEN_PERIOD;
+ token->s = &src[*pos];
+ token->len = 1;
+ *pos += 1;
+ }
+ else if (c == '\'')
+ {
+ token->type = TOKEN_QUOTE;
+ token->s = &src[*pos];
+ token->len = 1;
+ *pos += 1;
+ }
+ else if (isdigit(c))
+ {
+ token->type = TOKEN_INT;
+ token->s = &src[*pos];
+
+ while (!isspace(src[*pos]))
+ {
+ if (isdigit(src[*pos]))
+ {
+ *pos += 1;
+ }
+ else
+ {
+ c = src[*pos];
+
+ if (c == '(' || c == ')')
+ {
+ break;
+ }
+
+ return -1;
+ }
+ }
+
+ token->len = &src[*pos] - token->s;
+ }
+ else if (c == '"')
+ {
+ *pos += 1;
+ token->type = TOKEN_STR;
+ token->s = &src[*pos];
+
+ while (src[*pos] != '"')
+ {
+ *pos += 1;
+ }
+
+ token->len = &src[*pos] - token->s;
+
+ *pos += 1;
+ }
+ else if (isalnum(c) || ispunct(c))
+ {
+ token->type = TOKEN_SYMBOL;
+ token->s = &src[*pos];
+ *pos += 1;
+
+ while ((isalnum(src[*pos]) || ispunct(src[*pos])) && src[*pos] != '(' && src[*pos] != ')')
+ {
+ *pos += 1;
+ }
+
+ token->len = &src[*pos] - token->s;
+ }
+ else
+ {
+ return -1;
+ }
+
+ return 1;
+}
+
+#ifdef BUILD_TEST
+
+#include "test_util.h"
+
+static const char *test_src_fact =
+ "(define fact\n"
+ " ;; Factorial function\n"
+ " (lambda (n)\n"
+ " (if (eq n 0)\n"
+ " 1 ; Factorial of 0 is 1\n"
+ " (* n (fact (- n 1))))))\n"
+ "(fact 5) ;; this should evaluate to 120\n";
+
+TEST(test_get_next_token)
+{
+ int pos = 0;
+
+ struct token token;
+
+ ASSERT_EQ(1, get_next_token(test_src_fact, &pos, &token));
+ ASSERT_EQ(TOKEN_LPAREN, token.type);
+
+ ASSERT_EQ(1, get_next_token(test_src_fact, &pos, &token));
+ ASSERT_EQ(TOKEN_SYMBOL, token.type);
+ ASSERT_STREQ_N("define", token.s, 6);
+
+ ASSERT_EQ(1, get_next_token(test_src_fact, &pos, &token));
+ ASSERT_EQ(TOKEN_SYMBOL, token.type);
+ ASSERT_STREQ_N("fact", token.s, 4);
+
+ ASSERT_EQ(1, get_next_token(test_src_fact, &pos, &token));
+ ASSERT_EQ(TOKEN_LPAREN, token.type);
+
+ ASSERT_EQ(1, get_next_token(test_src_fact, &pos, &token));
+ ASSERT_EQ(TOKEN_SYMBOL, token.type);
+ ASSERT_STREQ_N("lambda", token.s, 6);
+
+ ASSERT_EQ(1, get_next_token(test_src_fact, &pos, &token));
+ ASSERT_EQ(TOKEN_LPAREN, token.type);
+
+ ASSERT_EQ(1, get_next_token(test_src_fact, &pos, &token));
+ ASSERT_EQ(TOKEN_SYMBOL, token.type);
+ ASSERT_STREQ_N("n", token.s, 1);
+
+ ASSERT_EQ(1, get_next_token(test_src_fact, &pos, &token));
+ ASSERT_EQ(TOKEN_RPAREN, token.type);
+
+ ASSERT_EQ(1, get_next_token(test_src_fact, &pos, &token));
+ ASSERT_EQ(1, get_next_token(test_src_fact, &pos, &token));
+ ASSERT_EQ(1, get_next_token(test_src_fact, &pos, &token));
+ ASSERT_EQ(1, get_next_token(test_src_fact, &pos, &token));
+ ASSERT_EQ(1, get_next_token(test_src_fact, &pos, &token));
+
+ ASSERT_EQ(1, get_next_token(test_src_fact, &pos, &token));
+ ASSERT_EQ(TOKEN_INT, token.type);
+ ASSERT_STREQ_N("0", token.s, 1);
+
+ ASSERT_EQ(1, get_next_token(test_src_fact, &pos, &token));
+ ASSERT_EQ(1, get_next_token(test_src_fact, &pos, &token));
+ ASSERT_EQ(1, get_next_token(test_src_fact, &pos, &token));
+
+ ASSERT_EQ(1, get_next_token(test_src_fact, &pos, &token));
+ ASSERT_EQ(TOKEN_SYMBOL, token.type);
+ ASSERT_STREQ_N("*", token.s, 1);
+}
+
+#endif /* BUILD_TEST */
diff --git a/tokens.h b/tokens.h
new file mode 100644
index 0000000..8b06454
--- /dev/null
+++ b/tokens.h
@@ -0,0 +1,24 @@
+#ifndef TOKENS_H
+#define TOKENS_H
+
+enum
+{
+ TOKEN_INT,
+ TOKEN_STR,
+ TOKEN_SYMBOL,
+ TOKEN_LPAREN,
+ TOKEN_RPAREN,
+ TOKEN_PERIOD,
+ TOKEN_QUOTE
+};
+
+struct token
+{
+ const char *s;
+ int len;
+ int type;
+};
+
+int get_next_token(const char *src, int *pos, struct token *token);
+
+#endif
diff --git a/tst_main.c b/tst_main.c
new file mode 100644
index 0000000..6e99cac
--- /dev/null
+++ b/tst_main.c
@@ -0,0 +1,2 @@
+#include "test_util.h"
+TEST_MAIN()
generated by cgit v1.2.3 (git 2.25.1) at 2025-12-15 06:35:09 +0000