1 files changed, 108 insertions, 0 deletions
diff --git a/package/utils/ucode-mod-uline/src/vt100.c b/package/utils/ucode-mod-uline/src/vt100.c
new file mode 100644
index 0000000000..f81b11d3ad
--- /dev/null
+++ b/package/utils/ucode-mod-uline/src/vt100.c
@@ -0,0 +1,108 @@
+// SPDX-License-Identifier: ISC
+/*
+ * Copyright (C) 2025 Felix Fietkau <nbd@nbd.name>
+ */
+#include <string.h>
+#include <stdlib.h>
+#include "uline.h"
+#include "private.h"
+
+enum vt100_escape vt100_esc_decode(const char *str, uint32_t *data)
+{
+	unsigned long code, code2;
+	char *err;
+
+	switch (*(str++)) {
+	case 0:
+		return VT100_INCOMPLETE;
+	case '[':
+	case 'O':
+		switch (*(str++)) {
+		case 0:
+			return VT100_INCOMPLETE;
+		case 'A':
+			return VT100_CURSOR_UP;
+		case 'B':
+			return VT100_CURSOR_DOWN;
+		case 'C':
+			return VT100_CURSOR_RIGHT;
+		case 'D':
+			return VT100_CURSOR_LEFT;
+		case 'F':
+			return VT100_END;
+		case 'H':
+			return VT100_HOME;
+		case '5':
+			switch (*str) {
+			case 'C':
+				return VT100_CURSOR_WORD_RIGHT;
+			case 'D':
+				return VT100_CURSOR_WORD_LEFT;
+			default:
+				break;
+			}
+			/* fallthrough */
+		case '0' ... '4':
+		case '6' ... '9':
+			str--;
+			code = strtoul(str, &err, 10);
+			switch (*err) {
+			case 0:
+				return VT100_INCOMPLETE;
+			case '~':
+				switch (code) {
+				case 1:
+					return VT100_HOME;
+				case 3:
+					return VT100_DELETE;
+				case 4:
+					return VT100_END;
+				case 200:
+				case 201:
+					// paste start/end
+					return VT100_IGNORE;
+				default:
+					return VT100_UNKNOWN;
+				}
+			case ';':
+				code2 = strtoul(err + 1, &err, 10);
+				switch (*err) {
+				case 0:
+					return VT100_INCOMPLETE;
+				case 'R':
+					*data = (code2 << 16) | (code & 0xffff);
+					return VT100_CURSOR_POS;
+				default:
+					return VT100_UNKNOWN;
+				}
+			default:
+				return VT100_UNKNOWN;
+			}
+		default:
+			return VT100_UNKNOWN;
+		}
+	default:
+		return VT100_UNKNOWN;
+	}
+}
+
+void __vt100_csi_num(FILE *out, int num, char code)
+{
+	fprintf(out, "\e[%d%c", num, code);
+}
+
+void __vt100_esc(FILE *out, char c)
+{
+	char seq[] = "\eX";
+	seq[1] = c;
+	fputs(seq, out);
+}
+
+void __vt100_csi2(FILE *out, char c1, char c2)
+{
+	char seq[] = "\e[XX";
+
+	seq[2] = c1;
+	seq[3] = c2;
+	fputs(seq, out);
+}