From 342886a098683a054c4cd15283d07f7d0c448bf9 Mon Sep 17 00:00:00 2001
From: Emile Clark-Boman <eclarkboman@gmail.com>
Date: Tue, 9 Sep 2025 11:25:59 +1000
Subject: [PATCH] test custom curses implementation

---
 lib/cursed.c | 94 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 lib/cursed.h | 41 +++++++++++++++++++++++
 2 files changed, 135 insertions(+)
 create mode 100644 lib/cursed.c
 create mode 100644 lib/cursed.h

diff --git a/lib/cursed.c b/lib/cursed.c
new file mode 100644
index 0000000..49c17c6
--- /dev/null
+++ b/lib/cursed.c
@@ -0,0 +1,94 @@
+#include <ctype.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/ioctl.h>
+
+#include "cursed.h"
+#include "termios.h"
+
+struct s_state *glstate;
+
+PRIVATE inline int termenable(struct s_state *st) {
+  struct termios term;
+
+  // if (!st)
+  //   return 1;
+
+  if (ioctl(0, TCGETS, &term) == -1)
+    return 1;
+  memcpy(&st->term, &term, sizeof(struct termios));
+  // control characters
+  // term.c_cc[VMIN] = 1;
+  // term.c_cc[VTIME] = 0;
+  // io flags
+  term.c_iflag &= ~(IXON | INPCK | ICRNL | ISTRIP | BRKINT);
+  term.c_oflag &= ~(OPOST); // disable post-processing (using \r\n manually now)
+  term.c_cflag |= (CS8);
+  // misc flags
+  term.c_lflag &= ~(ECHO | ICANON | IEXTEN);
+  if (ioctl(0, TCSETS, &term))
+    return 1;
+
+  // unbuffer stdin
+  // if (setvbuf(stdin, NULL, _IOLBF, 0))
+  //   return 1;
+
+  return 0;
+}
+
+PRIVATE inline int termdisable(struct s_state *st) {
+  if (!st)
+    return 1;
+
+  if (ioctl(0, TCSETS, &st->term))
+    return 1;
+  
+  return 0;
+}
+
+PRIVATE struct s_framebuffer *init_framebuffer(pos cols, pos rows) {
+  unsigned long int fbsz, bmsz; // framebuf + bitmap sizes
+  struct s_framebuffer *buf;
+}
+
+PRIVATE struct s_state *init_state(void) {
+  struct s_state *st = (struct s_state*)malloc(sizeof(struct s_state));
+  if (st == NULL) exit(1); // BUG: WARNING: TODO
+  return st;
+}
+
+PUBLIC _INIT void initlib(void) {
+  // atexit(destroylib)
+  glstate = init_state();
+  termenable(glstate);
+  // (volatile void)init_window(glstate, 90, 25);
+}
+
+PUBLIC _FINI void destroylib(void) {
+  // if (glstate != NULL) 
+  termdisable(glstate);
+}
+
+
+
+int main(int argc, char **argv) {
+  // TODO: use STDIN_FILENO instead for 0
+  char c, s[10];
+  int pad;
+  while (read(STDIN_FILENO, &c, 1) == 1) {
+    sprintf(s, "%d", c);
+    pad = 3 - strlen(s); // max is 256 (strlen 3)
+    
+    printf("0x%.02hhx %s", c, s);
+    if (!iscntrl(c)) {
+      for (int i=0; i < pad; i++)
+        putchar(' ');
+      printf(" (%c)", c);
+    }
+    printf("\r\n");
+  }
+
+  return EXIT_SUCCESS;
+}
diff --git a/lib/cursed.h b/lib/cursed.h
new file mode 100644
index 0000000..439f51c
--- /dev/null
+++ b/lib/cursed.h
@@ -0,0 +1,41 @@
+#ifndef CURSED_H
+#define CURSED_H
+
+#include <stdbool.h>
+#include <sys/termios.h>
+
+#define PACKED __attribute__((packed, aligned(1)))
+#define PUBLIC __attribute((visibility("default")))
+#define PROTECTED __attribute__((visibility("hidden")))
+#define PRIVATE static
+
+#define _INIT __attribute__((constructor))
+#define _FINI __attribute__((destructor))
+
+typedef unsigned char uid;      // >=  8B
+typedef unsigned short int pos; // >= 16B
+
+struct s_framebuffer {
+  pos *buf; // framebuffer
+  bool bitmap[];
+} PACKED;
+
+struct s_window {
+  uid id;
+  pos cols;
+  pos rows;
+  struct s_framebuffer frame;
+
+  pos x;
+  pos y;
+} PACKED;
+
+struct s_state {
+  struct termios term;
+} PACKED;
+
+// === Public API ===
+PRIVATE struct s_framebuffer *init_framebuffer(pos cols, pos rows);
+PUBLIC struct s_window *init_window(uid id, pos cols, pos rows);
+
+#endif /* CURSED_H */