1 files changed, 47 insertions, 0 deletions
diff --git a/src/runtime/value/bytes.c b/src/runtime/value/bytes.c
new file mode 100644
index 0000000..6a6edb6
--- /dev/null
+++ b/src/runtime/value/bytes.c
@@ -0,0 +1,47 @@
+#include <lcq/pit/runtime/value/bytes.h>
+
+bool pit_value_is_bytes(pit_runtime *rt, pit_value a) {
+    return pit_value_is_ref_heavy_sort(rt, a, PIT_VALUE_HEAVY_SORT_BYTES);
+}
+pit_value pit_value_bytes_new(pit_runtime *rt, u8 *buf, i64 len) {
+    u8 *dest = pit_arena_alloc_back(rt->heap, len);
+    if (!dest) { pit_error(rt, "failed to allocate bytes"); return PIT_NIL; }
+    pit_libc_string_memcpy(dest, buf, (size_t) len);
+    pit_value ret = pit_value_ref_heavy_new(rt);
+    pit_value_heavy *h = pit_value_ref_deref(rt, pit_value_as_ref(rt, ret));
+    if (!h) { pit_error(rt, "failed to create new heavy value for bytes"); return PIT_NIL; }
+    h->hsort = PIT_VALUE_HEAVY_SORT_BYTES;
+    h->in.bytes.data = dest;
+    h->in.bytes.len = len;
+    return ret;
+}
+pit_value pit_value_bytes_new_cstr(pit_runtime *rt, char *s) {
+    return pit_value_bytes_new(rt, (u8 *) s, (i64) pit_libc_string_strlen(s));
+}
+/* return true if v is a reference to bytes that are the same as those in buf */
+bool pit_value_bytes_match(pit_runtime *rt, pit_value v, u8 *buf, i64 len) {
+    if (pit_value_sort(v) != PIT_VALUE_SORT_REF) return false;
+    pit_value_heavy *h = pit_value_ref_deref(rt, pit_value_as_ref(rt, v));
+    if (!h) { pit_error(rt, "bad ref"); return false; }
+    if (h->hsort != PIT_VALUE_HEAVY_SORT_BYTES) return false;
+    if (h->in.bytes.len != len) return false;
+    for (i64 i = 0; i < len; ++i)
+        if (h->in.bytes.data[i] != buf[i]) {
+            return false;
+        }
+    return true;
+}
+i64 pit_value_bytes_copy(pit_runtime *rt, pit_value v, u8 *buf, i64 maxlen) {
+    if (pit_value_sort(v) != PIT_VALUE_SORT_REF) { pit_error(rt, "not a ref"); return -1; }
+    pit_value_heavy *h = pit_value_ref_deref(rt, pit_value_as_ref(rt, v));
+    if (!h) { pit_error(rt, "bad ref"); return -1; }
+    if (h->hsort != PIT_VALUE_HEAVY_SORT_BYTES) {
+        pit_error(rt, "invalid use of value as bytes");
+        return -1;
+    }
+    i64 len = maxlen < h->in.bytes.len ? maxlen : h->in.bytes.len;
+    for (i64 i = 0; i < len; ++i) {
+        buf[i] = h->in.bytes.data[i];
+    }
+    return len;
+}