1 files changed, 24 insertions, 0 deletions
diff --git a/src/third-party/base64/lib/arch/generic/enc_head.c b/src/third-party/base64/lib/arch/generic/enc_head.c
new file mode 100644
index 0000000..38d60b2
--- /dev/null
+++ b/src/third-party/base64/lib/arch/generic/enc_head.c
@@ -0,0 +1,24 @@
+// Assume that *out is large enough to contain the output.
+// Theoretically it should be 4/3 the length of src.
+const uint8_t *s = (const uint8_t *) src;
+uint8_t *o = (uint8_t *) out;
+
+// Use local temporaries to avoid cache thrashing:
+size_t olen = 0;
+size_t slen = srclen;
+struct base64_state st;
+st.bytes = state->bytes;
+st.carry = state->carry;
+
+// Turn three bytes into four 6-bit numbers:
+// in[0] = 00111111
+// in[1] = 00112222
+// in[2] = 00222233
+// in[3] = 00333333
+
+// Duff's device, a for() loop inside a switch() statement. Legal!
+switch (st.bytes)
+{
+	for (;;)
+	{
+	case 0: