1 files changed, 51 insertions, 0 deletions
diff --git a/src/buffer.c b/src/buffer.c
new file mode 100644
index 0000000..51a3e3c
--- /dev/null
+++ b/src/buffer.c
@@ -0,0 +1,51 @@
+//
+// Created by Anshul Gupta on 4/4/25.
+//
+
+#include "buffer.h"
+
+#include <assert.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "alloc.h"
+
+buffer_t buffer_new(size_t cap)
+{
+	buffer_t buf;
+
+	if (cap == 0)
+		return (buffer_t) {NULL, 0, 0};
+
+	cap = (cap + 7) & ~7; // Align to 8 bytes
+	buf.data = gmalloc(cap);
+	if (!buf.data)
+		abort();
+
+	return (buffer_t) {buf.data, 0, cap};
+}
+
+void buffer_free(buffer_t buf) { gfree(buf.data); }
+
+void buffer_reserve(buffer_t *buf, size_t cap)
+{
+	if (buf->cap >= cap)
+		return;
+
+	cap = (cap + 7) & ~7; // Align to 8 bytes
+	uint8_t *new_data = grealloc(buf->data, cap);
+	if (!new_data)
+		abort();
+	buf->data = new_data;
+	buf->cap = cap;
+}
+
+void buffer_append(buffer_t *buf, const void *data, size_t len)
+{
+	if (buf->len + len > buf->cap)
+		buffer_reserve(buf, buf->len + len);
+
+	memcpy(buf->data + buf->len, data, len);
+	buf->len += len;
+	assert(buf->len <= buf->cap);
+}