ZVAL_STRINGL please work

ext/hash.c

@@ -0,0 +1,58 @@
+/**
+ * Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ * SPDX-License-Identifier: Apache-2.0.
+ */
+
+#include "php_aws_crt.h"
+
+PHP_FUNCTION(aws_crt_sha1_new) {
+    aws_crt_hash *hash = aws_crt_sha1_new();
+    RETURN_LONG((zend_ulong)hash);
+}
+
+PHP_FUNCTION(aws_crt_sha256_new) {
+    aws_crt_hash *hash = aws_crt_sha256_new();
+    RETURN_LONG((zend_ulong)hash);
+}
+
+PHP_FUNCTION(aws_crt_md5_new) {
+    aws_crt_hash *hash = aws_crt_md5_new();
+    RETURN_LONG((zend_ulong)hash);
+}
+
+PHP_FUNCTION(aws_crt_hash_update) {
+    zend_ulong php_hash = 0;
+    const char * buffer = NULL;
+    size_t len = 0;
+    aws_php_parse_parameters("ls", &php_hash, &buffer, &len);
+    aws_crt_hash *hash = (void *) php_hash;
+    RETURN_LONG((zend_ulong) aws_crt_hash_update(hash, (uint8_t *)buffer, (uint32_t) len));
+}
+
+PHP_FUNCTION(aws_crt_hash_digest) {
+    zend_ulong php_hash = 0;
+    size_t truncate_to = 0;
+    size_t length = 0;
+    aws_php_parse_parameters("lll", &php_hash, &truncate_to, &length);
+    aws_crt_hash *hash = (void *) php_hash;
+    if (truncate_to != 0 && length > truncate_to) {
+        length = truncate_to;
+    }
+    uint8_t *output = aws_crt_hash_digest(hash, truncate_to);
+    size_t len = strlen((const char *)output) + 1;
+    char arr[len];  // Make sure there's enough space
+    strcpy(arr, (char *) output);
+    printf(arr);
+    zval *php_output = NULL;
+    ZVAL_STRINGL(php_output, (const char *)output, length);
+    aws_mem_release(aws_crt_default_allocator(), output);
+    // copy false, destroy false?
+    RETURN_ZVAL(php_output, false, false);
+}
+
+PHP_FUNCTION(aws_crt_hash_destroy) {
+    zend_ulong php_hash = 0;
+    aws_php_parse_parameters("l", &php_hash);
+    aws_crt_hash *hash = (void *) php_hash;
+    aws_crt_hash_destroy(hash);
+}