From 5e464afa775b163b39deeaf73f111897e5615b07 Mon Sep 17 00:00:00 2001
From: Joseph Ferano <joseph@ferano.io>
Date: Thu, 15 Sep 2022 18:14:08 +0700
Subject: [PATCH] WIP: Identify a basic Control Sequence Introducer

---
 bt.c | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/bt.c b/bt.c
index 4fb02d3..bfccddd 100644
--- a/bt.c
+++ b/bt.c
@@ -193,6 +193,30 @@ int main(void) {
                     DrawTextEx(*fontDefault, row_buf, pos, fontsize, 0, RAYWHITE);
                     nrow++;
                     ncol = 0;
+                } if (sb.buf[c] == '\x1b') {
+                    int c2 = c + 1;
+                    // Control Sequence Introducer
+                    int csi_args[16];
+                    char csi_code;
+                    int nargs = 0;
+                    if (sb.buf[c2] == '[') {
+                        char *esc_buf = sb.buf + c2 + 1;
+                        while (true) {
+                            char *substr;
+                            long num = strtol(esc_buf, &substr, 10);
+                            if (esc_buf != substr) {
+                                csi_args[nargs++] = num;
+                                esc_buf = substr;
+                                if (substr[0] == ';') {
+                                    esc_buf++;
+                                }
+                                continue;
+                            }
+                            csi_code = substr[0];
+                            break;
+                        }
+                    }
+                    printf("Found an escape sequence. Code: %c.\n", csi_code);
                 } else {
                     row_buf[ncol] = sb.buf[c];
                     ncol++;