From 6f84b07d939be6ef5e50c5468b95651fb4465500 Mon Sep 17 00:00:00 2001
From: Nicholas Noll <nbnoll@eml.cc>
Date: Fri, 12 Jun 2020 17:53:56 -0700
Subject: prototype of tinycurses

---
 sys/libterm/input.c | 108 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 108 insertions(+)
 create mode 100644 sys/libterm/input.c

(limited to 'sys/libterm/input.c')

diff --git a/sys/libterm/input.c b/sys/libterm/input.c
new file mode 100644
index 0000000..038e8df
--- /dev/null
+++ b/sys/libterm/input.c
@@ -0,0 +1,108 @@
+#include <u.h>
+#include <libn.h>
+#include <unibilium.h>
+
+#define iota(x)     1 << (x)
+
+// -----------------------------------------------------------------------
+// enums
+
+enum 
+{
+    KeyRune, KeyFunc, KeySym, 
+    KeyMouse, KeyPosition, KeyModeReport, 
+    KeyDCS, KeyOSC, /* add other recognised types here */
+    KeyUnknownCSI = -1
+};
+
+enum KeyEvent 
+{
+    EvNil, EvKey, EvEOF, EvAgain, EvErr,
+};
+
+enum 
+{
+    SymUnknown = -1,
+    SymNone    =  0,
+
+    /* special names in c0 */
+    SymBackspace, SymTab, SymEnter, SymEscape,
+
+    /* special names in g0 */
+    SymSpace, SymDel,
+
+    /* special keys */
+    SymUp, SymDown, SymLeft, SymRight, SymBegin, SymFind, SymInsert,
+    SymDelete, SymSelect, SymPageUp, SymPageDown, SymHome, SymEnd,
+
+    /* special keys from terminfo */
+    SymCancel,  SymClear,  SymClose,     SymCommand, SymCopy, SymExit,
+    SymHelp,    SymMark,   SymMessage,   SymMove,    SymOpen, SymOptions,
+    SymPrint,   SymRedo,   SymReference, SymRefresh, SymReplace,
+    SymRestart, SymResume, SymSave,      SymSuspend, SymUndo,
+
+    /* numeric keypad special keys */
+    SymKp0, SymKp1, SymKp2, SymKp3, SymKp4, SymKp5, SymKp6, SymKp7, SymKp8,
+    SymKp9, SymKpEnter, SymKpPlus, SymKpMinus, SymKpMul, SymKpDiv, SymKpComma,
+    SymKpDot, SymKpEq,
+
+    /* et cetera ad nauseum */
+    NumSyms 
+};
+
+enum MouseEvent
+{
+    MouseNil, MousePress, MouseDrag, MouseRelease,
+};
+
+enum 
+{
+    ModShift = iota(0),
+    ModAlt   = iota(1),
+    ModCtrl  = iota(2),
+};
+
+// -----------------------------------------------------------------------
+// types
+
+typedef struct Input Input;
+
+struct Input
+{
+    int fd;
+    int wait; /* in msec */
+    struct {
+        char *b, *c, bytes[1024];
+    } rbuf;   /* read buffer */
+    struct {
+        char *b, *c, bytes[1024];
+    } ebuf;   /* escape buffer */
+};
+
+// -----------------------------------------------------------------------
+// globals
+
+// -----------------------------------------------------------------------
+// utility functions
+
+// -----------------------------------------------------------------------
+// implementation
+
+Input *
+makeinput(int fd, int flags, unibi_term *info)
+{
+    int    i;
+    Input *in;
+    char  *e;
+
+    if (!(in = calloc(1, sizeof(in))))
+        panicf("out of memory");
+
+    in->fd      = fd;
+    in->wait    = 50; /* in msec */
+
+    /* initialize buffers */
+    in->rbuf.c = in->rbuf.b = in->rbuf.bytes;
+
+    return in;
+}
-- 
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