aboutsummaryrefslogtreecommitdiff
diff options
context:
space:
mode:
authorPřemysl Janouch <p.janouch@gmail.com>2017-05-21 13:01:23 +0200
committerPřemysl Janouch <p.janouch@gmail.com>2017-05-21 13:19:50 +0200
commitf0156897c82da0ac30bc16aef8d301e7e07c44c6 (patch)
treeddd8d1e6bd6b406264dd40dc22e2fd2a76fafd3f
parent455845d078f39f3969139c6a0729e0b081cfa159 (diff)
downloadell-f0156897c82da0ac30bc16aef8d301e7e07c44c6.tar.gz
ell-f0156897c82da0ac30bc16aef8d301e7e07c44c6.tar.xz
ell-f0156897c82da0ac30bc16aef8d301e7e07c44c6.zip
Add a REPL for toying around
-rw-r--r--.gitignore3
-rw-r--r--Makefile2
-rw-r--r--repl.c73
3 files changed, 76 insertions, 2 deletions
diff --git a/.gitignore b/.gitignore
index 870f5b5..d2554f0 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,6 +1,7 @@
# Build files
/build
-/ell
+/interpreter
+/repl
# Qt Creator files
/CMakeLists.txt.user*
diff --git a/Makefile b/Makefile
index 0b52f38..62b8853 100644
--- a/Makefile
+++ b/Makefile
@@ -4,7 +4,7 @@ all: interpreter
interpreter: interpreter.c ell.c
$(CC) $(CFLAGS) $< -o $@
repl: repl.c ell.c
- $(CC) $(CFLAGS) $< -o $@
+ $(CC) $(CFLAGS) $< -o $@ -lreadline
clean:
rm -f interpreter repl
.PHONY: all clean
diff --git a/repl.c b/repl.c
new file mode 100644
index 0000000..c2fbf02
--- /dev/null
+++ b/repl.c
@@ -0,0 +1,73 @@
+/*
+ * repl.c: test REPL
+ *
+ * Copyright (c) 2017, Přemysl Janouch <p.janouch@gmail.com>
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
+ * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
+ * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
+ * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ */
+
+#include "ell.c"
+#include <readline/readline.h>
+#include <readline/history.h>
+
+int
+main (int argc, char *argv[]) {
+ (void) argc;
+
+ struct context ctx;
+ context_init (&ctx);
+ if (!init_runtime_library (&ctx))
+ printf ("%s\n", "runtime library initialization failed");
+
+ using_history ();
+ const char *slash = strrchr (argv[0], '/');
+ rl_readline_name = slash ? ++slash : argv[0];
+
+ char *line;
+ while ((line = readline ("> "))) {
+ struct parser parser;
+ parser_init (&parser, line, strlen (line));
+ add_history (line);
+
+ const char *e = NULL;
+ struct item *program = parser_run (&parser, &e);
+ free (line);
+ if (e) {
+ printf ("\x1b[31m%s: %s\x1b[0m\n", "parse error", e);
+ parser_free (&parser);
+ continue;
+ }
+ parser_free (&parser);
+
+ struct item *result = NULL;
+ (void) execute (&ctx, program, &result);
+ item_free_list (program);
+
+ const char *failure = ctx.error;
+ if (ctx.memory_failure)
+ failure = "memory allocation failure";
+ if (failure) {
+ printf ("\x1b[31m%s: %s\x1b[0m\n", "runtime error", failure);
+ free (ctx.error);
+ ctx.error = NULL;
+ ctx.memory_failure = false;
+ } else {
+ print_tree (result, 0);
+ putchar ('\n');
+ item_free_list (result);
+ }
+ }
+ context_free (&ctx);
+ return 0;
+}