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diff --git a/fluent-bit/lib/wasm-micro-runtime-WAMR-1.2.2/core/iwasm/interpreter/wasm_loader.h b/fluent-bit/lib/wasm-micro-runtime-WAMR-1.2.2/core/iwasm/interpreter/wasm_loader.h
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+++ b/fluent-bit/lib/wasm-micro-runtime-WAMR-1.2.2/core/iwasm/interpreter/wasm_loader.h
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+/*
+ * Copyright (C) 2019 Intel Corporation. All rights reserved.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+ */
+#ifndef _WASM_LOADER_H
+#define _WASM_LOADER_H
+
+#include "wasm.h"
+#include "bh_hashmap.h"
+#include "../common/wasm_runtime_common.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * Load a WASM module from a specified byte buffer.
+ *
+ * @param buf the byte buffer which contains the WASM binary data
+ * @param size the size of the buffer
+ * @param error_buf output of the exception info
+ * @param error_buf_size the size of the exception string
+ *
+ * @return return module loaded, NULL if failed
+ */
+WASMModule *
+wasm_loader_load(uint8 *buf, uint32 size,
+#if WASM_ENABLE_MULTI_MODULE != 0
+ bool main_module,
+#endif
+ char *error_buf, uint32 error_buf_size);
+
+/**
+ * Load a WASM module from a specified WASM section list.
+ *
+ * @param section_list the section list which contains each section data
+ * @param error_buf output of the exception info
+ * @param error_buf_size the size of the exception string
+ *
+ * @return return WASM module loaded, NULL if failed
+ */
+WASMModule *
+wasm_loader_load_from_sections(WASMSection *section_list, char *error_buf,
+ uint32 error_buf_size);
+
+/**
+ * Unload a WASM module.
+ *
+ * @param module the module to be unloaded
+ */
+void
+wasm_loader_unload(WASMModule *module);
+
+/**
+ * Find address of related else opcode and end opcode of opcode block/loop/if
+ * according to the start address of opcode.
+ *
+ * @param module the module to find
+ * @param start_addr the next address of opcode block/loop/if
+ * @param code_end_addr the end address of function code block
+ * @param block_type the type of block, 0/1/2 denotes block/loop/if
+ * @param p_else_addr returns the else addr if found
+ * @param p_end_addr returns the end addr if found
+ * @param error_buf returns the error log for this function
+ * @param error_buf_size returns the error log string length
+ *
+ * @return true if success, false otherwise
+ */
+
+bool
+wasm_loader_find_block_addr(WASMExecEnv *exec_env, BlockAddr *block_addr_cache,
+ const uint8 *start_addr, const uint8 *code_end_addr,
+ uint8 block_type, uint8 **p_else_addr,
+ uint8 **p_end_addr);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* end of _WASM_LOADER_H */