The quineHEADmaster

1 files changed, 27 insertions, 0 deletions

diff --git a/cquine.in.c b/cquine.in.c
new file mode 100644
index 0000000..42860c8
--- /dev/null
+++ b/cquine.in.c
@@ -0,0 +1,27 @@
+// SPDX-FileCopyrightText: 2024 Tomasz Kramkowski <tomasz@kramkow.ski>
+// SPDX-LicenseIdentifier: GPL-3.0-or-later
+
+#include <stdio.h>
+#include <string.h>
+
+void escape(char *dest, const char *src)
+{
+	for (size_t i = 0; src[i] != '\0'; i++) {
+		switch (src[i]) {
+		case '\t': *dest++ = '\\'; *dest++ = 't'; break;
+		case '\n': *dest++ = '\\'; *dest++ = 'n'; break;
+		case '"': *dest++ = '\\'; *dest++ = '"'; break;
+		case '\\': *dest++ = '\\'; *dest++ = '\\'; break;
+		default: *dest++ = src[i]; break;
+		}
+	}
+	*dest = '\0';
+}
+
+int main(void)
+{
+	const char *program = "%s";
+	char escaped[strlen(program) * 2 + 1];
+	escape(escaped, program);
+	printf(program, escaped);
+}