1 files changed, 39 insertions, 0 deletions
diff --git a/utils/write_c_string_literal.c b/utils/write_c_string_literal.c
new file mode 100644
index 00000000..e8b2f53b
--- /dev/null
+++ b/utils/write_c_string_literal.c
@@ -0,0 +1,39 @@
+/*
+ * Write data to a file or BinarySink in the form of a C string
+ * literal, with any non-printable-ASCII character escaped
+ * appropriately.
+ */
+
+#include "defs.h"
+#include "misc.h"
+
+void BinarySink_put_c_string_literal(BinarySink *bs, ptrlen str)
+{
+    for (const char *p = str.ptr; p < (const char *)str.ptr + str.len; p++) {
+        char c = *p;
+
+        if (c == '\n')
+            put_datalit(bs, "\\n");
+        else if (c == '\r')
+            put_datalit(bs, "\\r");
+        else if (c == '\t')
+            put_datalit(bs, "\\t");
+        else if (c == '\b')
+            put_datalit(bs, "\\b");
+        else if (c == '\\')
+            put_datalit(bs, "\\\\");
+        else if (c == '"')
+            put_datalit(bs, "\\\"");
+        else if (c >= 32 && c <= 126)
+            put_byte(bs, c);
+        else
+            put_fmt(bs, "\\%03o", (unsigned)c & 0xFFU);
+    }
+}
+
+void write_c_string_literal(FILE *fp, ptrlen str)
+{
+    stdio_sink s;
+    stdio_sink_init(&s, fp);
+    put_c_string_literal(&s, str);
+}