From abfe132b83219efa30220ecfdaf6e26e31b9d13d Mon Sep 17 00:00:00 2001
From: Aleksey Veresov <aleksey@veresov.pro>
Date: Sun, 3 Jan 2021 01:19:12 +0300
Subject: Input-output added.

---
 examples/generated.c  |  6 ++++++
 examples/translator.c |  2 +-
 src/csx.c             | 33 ++++++++++++++++++++++++++++++++-
 3 files changed, 39 insertions(+), 2 deletions(-)
 create mode 100644 examples/generated.c

diff --git a/examples/generated.c b/examples/generated.c
new file mode 100644
index 0000000..0b70fd6
--- /dev/null
+++ b/examples/generated.c
@@ -0,0 +1,6 @@
+#include <csx.h>
+int main()
+{
+csx_eval(csx_list(csx_name("do"),csx_list(csx_name("define"),csx_name("a"),csx_num(10),0),csx_list(csx_name("define"),csx_name("b"),csx_list(csx_name("sum"),csx_name("a"),csx_num(3),0),0),csx_list(csx_name("outname"),csx_list(csx_name("quote"),csx_name("sum-of-10-and-3-is"),0),0),csx_list(csx_name("outnum"),csx_name("b"),0),0));
+return 0;
+}
diff --git a/examples/translator.c b/examples/translator.c
index 448d052..ad676c0 100644
--- a/examples/translator.c
+++ b/examples/translator.c
@@ -14,7 +14,7 @@ void readlist()
             readlist();
             printf("0)");
             c = getchar();
-        } else if (isdigit(c)) {
+        } else if (isdigit(c) || c == '-') {
             if (first) first = 0;
             else putchar(',');
             printf("csx_num(");
diff --git a/src/csx.c b/src/csx.c
index 7225792..1a643f2 100644
--- a/src/csx.c
+++ b/src/csx.c
@@ -3,6 +3,7 @@
 #include <stdlib.h>
 #include <stdarg.h>
 #include <string.h>
+#include <stdio.h>
 
 
 typedef enum csx_type {
@@ -380,7 +381,33 @@ static void *base_context(void *arg)
 
 static void *base_quote(void *arg)
 {
-    return arg;
+    return head(arg);
+}
+
+static void *base_input(void *arg)
+{
+    int res = getchar();
+    return res != EOF ? new_num(res) : null;
+}
+
+static void *base_output(void *arg)
+{
+    arg = eval_each(arg);
+    return putchar(*(int *)head(arg)) != EOF ? one : null;
+}
+
+static void *base_outname(void *arg)
+{
+    arg = eval_each(arg);
+    return fputs(head(arg), stdout) != EOF ? one : null;
+}
+
+static void *base_outnum(void *arg)
+{
+    arg = eval_each(arg);
+    int num = *(int *)head(arg);
+    printf("%d", num);
+    return one;
 }
 
 static void *base_fn(void *arg)
@@ -500,6 +527,10 @@ static void new_context()
     base_define(csx_list(new_name("if"), new_base(base_if), 0));
     base_define(csx_list(new_name("and"), new_base(base_and), 0));
     base_define(csx_list(new_name("or"), new_base(base_or), 0));
+    base_define(csx_list(new_name("input"), new_base(base_input), 0));
+    base_define(csx_list(new_name("output"), new_base(base_output), 0));
+    base_define(csx_list(new_name("outname"), new_base(base_outname), 0));
+    base_define(csx_list(new_name("outnum"), new_base(base_outnum), 0));
 }
 
 
-- 
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