/*
 * Copyright (C) 2019 Intel Corporation.  All rights reserved.
 * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 */

#ifndef _WASM_H_
#define _WASM_H_

#include "bh_platform.h"
#include "bh_hashmap.h"
#include "bh_assert.h"

#ifdef __cplusplus
extern "C" {
#endif

/* Value Types */
#define VALUE_TYPE_I32 0x7F
#define VALUE_TYPE_I64 0X7E
#define VALUE_TYPE_F32 0x7D
#define VALUE_TYPE_F64 0x7C
#define VALUE_TYPE_V128 0x7B
#define VALUE_TYPE_FUNCREF 0x70
#define VALUE_TYPE_EXTERNREF 0x6F
#define VALUE_TYPE_VOID 0x40

/* Packed Types */
#define PACKED_TYPE_I8 0x7A
#define PACKED_TYPE_I16 0x79

/* Reference Types */
#define REF_TYPE_FUNCREF VALUE_TYPE_FUNCREF
#define REF_TYPE_EXTERNREF VALUE_TYPE_EXTERNREF
/* extern is renamed back to any, the name extern is kept as
   an alias in the text format for backwards compatibility */
#define REF_TYPE_ANYREF VALUE_TYPE_EXTERNREF
#define REF_TYPE_EQREF 0x6D
#define REF_TYPE_HT_NULLABLE 0x6C
#define REF_TYPE_HT_NON_NULLABLE 0x6B
#define REF_TYPE_I31REF 0x6A
#define REF_TYPE_RTTN 0x69
#define REF_TYPE_RTT 0x68
#define REF_TYPE_DATAREF 0x67
#define REF_TYPE_ARRAYREF 0x66

/* Heap Types */
#define HEAP_TYPE_FUNC (-0x10)
#define HEAP_TYPE_EXTERN (-0x11)
#define HEAP_TYPE_ANY (-0x11)
#define HEAP_TYPE_EQ (-0x13)
#define HEAP_TYPE_I31 (-0x16)
#define HEAP_TYPE_RTTN (-0x17)
#define HEAP_TYPE_RTT (-0x18)
#define HEAP_TYPE_DATA (-0x19)
#define HEAP_TYPE_ARRAY (-0x20)

/* Defined Types */
#define DEFINED_TYPE_FUNC 0x60
#define DEFINED_TYPE_STRUCT 0x5F
#define DEFINED_TYPE_ARRAY 0x5E

/* Used by AOT */
#define VALUE_TYPE_I1 0x41
/* Used by loader to represent any type of i32/i64/f32/f64/v128,
 * and ref, including funcref/externref/anyref/eqref/i31ref/dataref,
 * (ref null $ht), and (ref $ht) */
#define VALUE_TYPE_ANY 0x42

#define DEFAULT_NUM_BYTES_PER_PAGE 65536

#if WASM_ENABLE_GC == 0
typedef uint32 table_elem_type_t;
#define NULL_REF (0xFFFFFFFF)
#else
typedef void *table_elem_type_t;
#define NULL_REF (NULL)
#define REF_CELL_NUM ((uint32)sizeof(uintptr_t) / sizeof(uint32))
#endif

#define TABLE_MAX_SIZE (1024)

#define INIT_EXPR_TYPE_I32_CONST 0x41
#define INIT_EXPR_TYPE_I64_CONST 0x42
#define INIT_EXPR_TYPE_F32_CONST 0x43
#define INIT_EXPR_TYPE_F64_CONST 0x44
#define INIT_EXPR_TYPE_V128_CONST 0xFD
/* = WASM_OP_REF_FUNC */
#define INIT_EXPR_TYPE_FUNCREF_CONST 0xD2
/* = WASM_OP_REF_NULL */
#define INIT_EXPR_TYPE_REFNULL_CONST 0xD0
#define INIT_EXPR_TYPE_GET_GLOBAL 0x23
#define INIT_EXPR_TYPE_RTT_CANON 0x30
#define INIT_EXPR_TYPE_RTT_SUB 0x31
#define INIT_EXPR_TYPE_ERROR 0xff

#define WASM_MAGIC_NUMBER 0x6d736100
#define WASM_CURRENT_VERSION 1

#define SECTION_TYPE_USER 0
#define SECTION_TYPE_TYPE 1
#define SECTION_TYPE_IMPORT 2
#define SECTION_TYPE_FUNC 3
#define SECTION_TYPE_TABLE 4
#define SECTION_TYPE_MEMORY 5
#define SECTION_TYPE_GLOBAL 6
#define SECTION_TYPE_EXPORT 7
#define SECTION_TYPE_START 8
#define SECTION_TYPE_ELEM 9
#define SECTION_TYPE_CODE 10
#define SECTION_TYPE_DATA 11
#if WASM_ENABLE_BULK_MEMORY != 0
#define SECTION_TYPE_DATACOUNT 12
#endif

#define SUB_SECTION_TYPE_MODULE 0
#define SUB_SECTION_TYPE_FUNC 1
#define SUB_SECTION_TYPE_LOCAL 2

#define IMPORT_KIND_FUNC 0
#define IMPORT_KIND_TABLE 1
#define IMPORT_KIND_MEMORY 2
#define IMPORT_KIND_GLOBAL 3

#define EXPORT_KIND_FUNC 0
#define EXPORT_KIND_TABLE 1
#define EXPORT_KIND_MEMORY 2
#define EXPORT_KIND_GLOBAL 3

#define LABEL_TYPE_BLOCK 0
#define LABEL_TYPE_LOOP 1
#define LABEL_TYPE_IF 2
#define LABEL_TYPE_FUNCTION 3

#define WASM_TYPE_FUNC 0
#define WASM_TYPE_STRUCT 1
#define WASM_TYPE_ARRAY 2

typedef struct WASMModule WASMModule;
typedef struct WASMFunction WASMFunction;
typedef struct WASMGlobal WASMGlobal;

typedef union V128 {
    int8 i8x16[16];
    int16 i16x8[8];
    int32 i32x8[4];
    int64 i64x2[2];
    float32 f32x4[4];
    float64 f64x2[2];
} V128;

#if WASM_ENABLE_GC != 0
typedef struct RttSubInitInfo {
    /* Which opcode to init the parent type of rtt.sub,
       currently it can only be rtt.canon */
    uint8 parent_init_expr_type;
    /* The type index of rtt.canon */
    uint32 parent_type_idx;
    /* The type index of rtt.sub */
    uint32 sub_type_idx;
} RttSubInitInfo;
#endif

typedef union WASMValue {
    int32 i32;
    uint32 u32;
    uint32 global_index;
    uint32 ref_index;
    int64 i64;
    uint64 u64;
    float32 f32;
    float64 f64;
    V128 v128;
#if WASM_ENABLE_GC != 0
    void *gc_obj;
#endif
} WASMValue;

typedef struct InitializerExpression {
    /* type of INIT_EXPR_TYPE_XXX, which is an instruction of
       constant expression */
    uint8 init_expr_type;
    WASMValue u;
} InitializerExpression;

#if WASM_ENABLE_GC != 0
/**
 * Reference type of (ref null ht) or (ref ht),
 * and heap type is defined type (type i), i >= 0
 */
typedef struct RefHeapType_TypeIdx {
    /* ref_type is REF_TYPE_HT_NULLABLE or
       REF_TYPE_HT_NON_NULLABLE, (0x6C or 0x6B) */
    uint8 ref_type;
    /* true if ref_type is REF_TYPE_HT_NULLABLE */
    bool nullable;
    /* heap type is defined type: type_index >= 0 */
    int32 type_idx;
} RefHeapType_TypeIdx;

/**
 * Reference type of (ref null ht) or (ref ht),
 * and heap type is rtt type with n (rtt n i)
 */
typedef struct RefHeapType_RttN {
    /* ref_type is REF_TYPE_HT_NULLABLE or
       REF_TYPE_HT_NON_NULLABLE (0x6C or 0x6B) */
    uint8 ref_type;
    /* true if ref_type is REF_TYPE_HT_NULLABLE */
    bool nullable;
    /* heap type is rtt type with n: rtt_type is -0x17 */
    int32 rtt_type;
    uint32 n;
    uint32 type_idx;
} RefHeapType_RttN;

/**
 * Reference type of (ref null ht) or (ref ht),
 * and heap type is rtt type without n (rtt i)
 */
typedef struct RefHeapType_Rtt {
    /* ref_type is REF_TYPE_HT_NULLABLE or
       REF_TYPE_HT_NON_NULLABLE (0x6C or 0x6B) */
    uint8 ref_type;
    /* true if ref_type is REF_TYPE_HT_NULLABLE */
    bool nullable;
    /* heap type is rtt type without n: rtt_type is -0x18 */
    int32 rtt_type;
    uint32 type_idx;
} RefHeapType_Rtt;

/**
 * Reference type of (ref null ht) or (ref ht),
 * and heap type is other type, not defined type and not rtt type
 */
typedef struct RefHeapType_Common {
    /* ref_type is REF_TYPE_HT_NULLABLE or
       REF_TYPE_HT_NON_NULLABLE (0x6C or 0x6B) */
    uint8 ref_type;
    /* true if ref_type is REF_TYPE_HT_NULLABLE */
    bool nullable;
    /* Common heap type (not defined type and not rtt type):
       -0x10 (func), -0x11 (any), -0x13 (eq),
       -0x16 (i31), -0x19 (data), -0x20 (array) */
    int32 heap_type;
} RefHeapType_Common;

/**
 * Reference type of (rtt n i)
 */
typedef struct RefRttNType {
    /* ref_type is REF_TYPE_RTTN (0x69) */
    uint8 ref_type;
    uint32 n;
    uint32 type_idx;
} RefRttNType;

/**
 * Reference type of (rtt i)
 */
typedef struct RefRttType {
    /* ref_type is REF_TYPE_RTTN (0x68) */
    uint8 ref_type;
    uint32 type_idx;
} RefRttType;

/**
 * Reference type
 */
typedef union WASMRefType {
    uint8 ref_type;
    RefHeapType_TypeIdx ref_ht_typeidx;
    RefHeapType_RttN ref_ht_rttn;
    RefHeapType_Rtt ref_ht_rtt;
    RefHeapType_Common ref_ht_common;
    RefRttNType ref_rttn;
    RefRttType ref_rtt;
} WASMRefType;

typedef struct WASMRefTypeMap {
    /**
     * The type index of a type array, which only stores
     * the first byte of the type, e.g. WASMFuncType.types,
     * WASMStructType.fields
     */
    uint16 index;
    /* The full type info if the type cannot be described
       with one byte */
    WASMRefType *ref_type;
} WASMRefTypeMap;
#endif /* end of WASM_ENABLE_GC */

#if WASM_ENABLE_GC == 0
typedef struct WASMFuncType WASMType;
typedef WASMType *WASMTypePtr;
#else
/**
 * Common type, store the same fields of
 * WASMFuncType, WASMStructType and WASMArrayType
 */
typedef struct WASMType {
    /**
     * type_flag must be WASM_TYPE_FUNC/STRUCT/ARRAY to
     * denote that it is a WASMFuncType, WASMStructType or
     * WASMArrayType
     */
    uint16 type_flag;
    /* How many types are refering to this type
       in module->types array */
    uint16 ref_count;
    /* The index in type array */
    uint32 type_idx;

    uint32 data[1];
} WASMType, *WASMTypePtr;
#endif /* end of WASM_ENABLE_GC */

/**
 * Function type
 */
typedef struct WASMFuncType {
#if WASM_ENABLE_GC != 0
    /**
     * type_flag must be WASM_TYPE_FUNC for WASMFuncType
     * or this structure must be treated as WASMStructType or
     * WASMArrayType
     */
    uint16 type_flag;
    /* How many types are refering to this type
       in module->types array */
    uint16 ref_count;
    /* The index in type array */
    uint32 type_idx;
#endif

    uint16 param_count;
    uint16 result_count;
    uint16 param_cell_num;
    uint16 ret_cell_num;

#if WASM_ENABLE_GC != 0
    uint16 *param_offsets;
    uint16 total_param_size;
    uint16 ref_type_map_count;
    WASMRefTypeMap *ref_type_maps;
    WASMRefTypeMap *result_ref_type_maps;
#endif

    /* types of params and results, only store the first byte
     * of the type, if it cannot be described with one byte,
     * then the full type info is stored in ref_type_maps */
    uint8 types[1];
} WASMFuncType;

#if WASM_ENABLE_GC != 0
typedef struct WASMStructFieldType {
    uint16 field_flags;
    uint8 field_type;
    uint8 field_size;
    uint32 field_offset;
} WASMStructFieldType;

typedef struct WASMStructType {
    /**
     * type_flag must be WASM_TYPE_STRUCT for WASMStructType
     * or this structure must be treated as WASMFuncType or
     * WASMArrayType
     */
    uint16 type_flag;
    /* How many types are refering to this type
       in module->types array */
    uint16 ref_count;
    /* The index in type array */
    uint32 type_idx;

    /* total size of this struct object */
    uint32 total_size;
    uint16 field_count;

    uint16 ref_type_map_count;
    WASMRefTypeMap *ref_type_maps;

    /* Field info, note that fields[i]->field_type only stores
     * the first byte of the field type, if it cannot be described
     * with one byte, then the full field type info is stored in
     * ref_type_maps */
    WASMStructFieldType fields[1];
} WASMStructType;

typedef struct WASMArrayType {
    /**
     * type_flag must be WASM_TYPE_ARRAY for WASMArrayType
     * or this structure must be treated as WASMFuncType or
     * WASMStructType
     */
    uint16 type_flag;
    /* How many types are refering to this type
       in module->types array */
    uint16 ref_count;
    /* The index in type array */
    uint32 type_idx;

    uint16 elem_flags;
    uint8 elem_type;
    /* The full elem type info if the elem type cannot be
       described with one byte */
    WASMRefType *elem_ref_type;
} WASMArrayType;
#endif

typedef struct WASMTable {
    uint8 elem_type;
    /* 0: no max size, not shared, 1: hax max size, 2: shared */
    uint8 flags;
    bool possible_grow;
    uint32 init_size;
    /* specified if (flags & 1), else it is 0x10000 */
    uint32 max_size;
#if WASM_ENABLE_GC != 0
    WASMRefType *elem_ref_type;
#endif
} WASMTable;

typedef struct WASMMemory {
    uint32 flags;
    uint32 num_bytes_per_page;
    uint32 init_page_count;
    uint32 max_page_count;
} WASMMemory;

typedef struct WASMTableImport {
    char *module_name;
    char *field_name;
    uint8 elem_type;
    /* 0: no max size, 1: has max size */
    uint8 flags;
    bool possible_grow;
    uint32 init_size;
    /* specified if (flags & 1), else it is 0x10000 */
    uint32 max_size;
#if WASM_ENABLE_GC != 0
    WASMRefType *elem_ref_type;
#endif
#if WASM_ENABLE_MULTI_MODULE != 0
    WASMModule *import_module;
    WASMTable *import_table_linked;
#endif
} WASMTableImport;

typedef struct WASMMemoryImport {
    char *module_name;
    char *field_name;
    uint32 flags;
    uint32 num_bytes_per_page;
    uint32 init_page_count;
    uint32 max_page_count;
#if WASM_ENABLE_MULTI_MODULE != 0
    WASMModule *import_module;
    WASMMemory *import_memory_linked;
#endif
} WASMMemoryImport;

typedef struct WASMFunctionImport {
    char *module_name;
    char *field_name;
    /* function type */
    WASMFuncType *func_type;
    /* native function pointer after linked */
    void *func_ptr_linked;
    /* signature from registered native symbols */
    const char *signature;
    /* attachment */
    void *attachment;
    bool call_conv_raw;
#if WASM_ENABLE_MULTI_MODULE != 0
    WASMModule *import_module;
    WASMFunction *import_func_linked;
#endif
    bool call_conv_wasm_c_api;
    bool wasm_c_api_with_env;
} WASMFunctionImport;

typedef struct WASMGlobalImport {
    char *module_name;
    char *field_name;
    uint8 type;
    bool is_mutable;
    bool is_linked;
    /* global data after linked */
    WASMValue global_data_linked;
#if WASM_ENABLE_GC != 0
    WASMRefType *ref_type;
#endif
#if WASM_ENABLE_MULTI_MODULE != 0
    /* imported function pointer after linked */
    /* TODO: remove if not needed */
    WASMModule *import_module;
    WASMGlobal *import_global_linked;
#endif
} WASMGlobalImport;

typedef struct WASMImport {
    uint8 kind;
    union {
        WASMFunctionImport function;
        WASMTableImport table;
        WASMMemoryImport memory;
        WASMGlobalImport global;
        struct {
            char *module_name;
            char *field_name;
        } names;
    } u;
} WASMImport;

struct WASMFunction {
#if WASM_ENABLE_CUSTOM_NAME_SECTION != 0
    char *field_name;
#endif
    /* the type of function */
    WASMFuncType *func_type;
    uint32 local_count;
    uint8 *local_types;
#if WASM_ENABLE_GC != 0
    uint16 local_ref_type_map_count;
    WASMRefTypeMap *local_ref_type_maps;
#endif

    /* cell num of parameters */
    uint16 param_cell_num;
    /* cell num of return type */
    uint16 ret_cell_num;
    /* cell num of local variables */
    uint16 local_cell_num;
    /* offset of each local, including function parameters
       and local variables */
    uint16 *local_offsets;

    uint32 max_stack_cell_num;
    uint32 max_block_num;
    /* Whether function has opcode memory.grow */
    bool has_op_memory_grow;
    /* Whether function has opcode call or
       call_indirect */
    bool has_op_func_call;
    uint32 code_size;
    uint8 *code;
#if WASM_ENABLE_FAST_INTERP != 0
    uint32 code_compiled_size;
    uint8 *code_compiled;
    uint8 *consts;
    uint32 const_cell_num;
#endif
};

struct WASMGlobal {
    uint8 type;
    bool is_mutable;
#if WASM_ENABLE_GC != 0
    WASMRefType *ref_type;
#endif
    InitializerExpression init_expr;
};

typedef struct WASMExport {
    char *name;
    uint8 kind;
    uint32 index;
} WASMExport;

typedef struct WASMTableSeg {
    /* 0 to 7 */
    uint32 mode;
    /* funcref or externref, elemkind will be considered as funcref */
    uint32 elem_type;
#if WASM_ENABLE_GC != 0
    WASMRefType *elem_ref_type;
#endif
    bool is_dropped;
    /* optional, only for active */
    uint32 table_index;
    InitializerExpression base_offset;
    uint32 function_count;
    uint32 *func_indexes;
} WASMTableSeg;

typedef struct WASMDataSeg {
    uint32 memory_index;
    InitializerExpression base_offset;
    uint32 data_length;
#if WASM_ENABLE_BULK_MEMORY != 0
    bool is_passive;
#endif
    uint8 *data;
} WASMDataSeg;

typedef struct BlockAddr {
    const uint8 *start_addr;
    uint8 *else_addr;
    uint8 *end_addr;
} BlockAddr;

#if WASM_ENABLE_LIBC_WASI != 0
typedef struct WASIArguments {
    const char **dir_list;
    uint32 dir_count;
    const char **map_dir_list;
    uint32 map_dir_count;
    const char **env;
    uint32 env_count;
    /* in CIDR noation */
    const char **addr_pool;
    uint32 addr_count;
    char **argv;
    uint32 argc;
    int stdio[3];
} WASIArguments;
#endif

typedef struct StringNode {
    struct StringNode *next;
    char *str;
} StringNode, *StringList;

typedef struct BrTableCache {
    struct BrTableCache *next;
    /* Address of br_table opcode */
    uint8 *br_table_op_addr;
    uint32 br_count;
    uint32 br_depths[1];
} BrTableCache;

#if WASM_ENABLE_DEBUG_INTERP != 0
typedef struct WASMFastOPCodeNode {
    struct WASMFastOPCodeNode *next;
    uint64 offset;
    uint8 orig_op;
} WASMFastOPCodeNode;
#endif

struct WASMModule {
    /* Module type, for module loaded from WASM bytecode binary,
       this field is Wasm_Module_Bytecode;
       for module loaded from AOT file, this field is
       Wasm_Module_AoT, and this structure should be treated as
       AOTModule structure. */
    uint32 module_type;

    uint32 type_count;
    uint32 import_count;
    uint32 function_count;
    uint32 table_count;
    uint32 memory_count;
    uint32 global_count;
    uint32 export_count;
    uint32 table_seg_count;
    /* data seg count read from data segment section */
    uint32 data_seg_count;
#if WASM_ENABLE_BULK_MEMORY != 0
    /* data count read from datacount section */
    uint32 data_seg_count1;
#endif

    uint32 import_function_count;
    uint32 import_table_count;
    uint32 import_memory_count;
    uint32 import_global_count;

    WASMImport *import_functions;
    WASMImport *import_tables;
    WASMImport *import_memories;
    WASMImport *import_globals;

    WASMType **types;
    WASMImport *imports;
    WASMFunction **functions;
    WASMTable *tables;
    WASMMemory *memories;
    WASMGlobal *globals;
    WASMExport *exports;
    WASMTableSeg *table_segments;
    WASMDataSeg **data_segments;
    uint32 start_function;

    /* the index of auxiliary __data_end global,
       -1 means unexported */
    uint32 aux_data_end_global_index;
    /* auxiliary __data_end exported by wasm app */
    uint32 aux_data_end;

    /* the index of auxiliary __heap_base global,
       -1 means unexported */
    uint32 aux_heap_base_global_index;
    /* auxiliary __heap_base exported by wasm app */
    uint32 aux_heap_base;

    /* the index of auxiliary stack top global,
       -1 means unexported */
    uint32 aux_stack_top_global_index;
    /* auxiliary stack bottom resolved */
    uint32 aux_stack_bottom;
    /* auxiliary stack size resolved */
    uint32 aux_stack_size;

    /* the index of malloc/free function,
       -1 means unexported */
    uint32 malloc_function;
    uint32 free_function;

    /* the index of __retain function,
       -1 means unexported */
    uint32 retain_function;

    /* Whether there is possible memory grow, e.g. memory.grow opcode */
    bool possible_memory_grow;

    StringList const_str_list;
#if WASM_ENABLE_FAST_INTERP == 0
    bh_list br_table_cache_list_head;
    bh_list *br_table_cache_list;
#endif

#if WASM_ENABLE_LIBC_WASI != 0
    WASIArguments wasi_args;
    bool import_wasi_api;
#endif

#if WASM_ENABLE_MULTI_MODULE != 0
    /* TODO: add mutex for mutli-thread? */
    bh_list import_module_list_head;
    bh_list *import_module_list;
#endif
#if WASM_ENABLE_DEBUG_INTERP != 0 || WASM_ENABLE_DEBUG_AOT != 0
    bh_list fast_opcode_list;
    uint8 *buf_code;
    uint8 *load_addr;
    uint64 load_size;
    uint64 buf_code_size;
#endif

#if WASM_ENABLE_GC != 0
    /* Ref types hash set */
    HashMap *ref_type_set;
    /* Rtt object hash set */
    HashMap *rtt_obj_set;
#endif

#if WASM_ENABLE_DEBUG_INTERP != 0
    /**
     * Count how many instances reference this module. When source
     * debugging feature enabled, the debugger may modify the code
     * section of the module, so we need to report a warning if user
     * create several instances based on the same module
     *
     * Sub_instances created by lib-pthread or spawn API will not
     * influence or check the ref count
     */
    uint32 ref_count;
    korp_mutex ref_count_lock;
#endif

#if WASM_ENABLE_CUSTOM_NAME_SECTION != 0
    const uint8 *name_section_buf;
    const uint8 *name_section_buf_end;
#endif
};

typedef struct BlockType {
    /* Block type may be expressed in one of two forms:
     * either by the type of the single return value or
     * by a type index of module.
     */
    union {
        struct {
            uint8 type;
#if WASM_ENABLE_GC != 0
            WASMRefTypeMap ref_type_map;
#endif
        } value_type;
        WASMFuncType *type;
    } u;
    bool is_value_type;
} BlockType;

typedef struct WASMBranchBlock {
    uint8 *begin_addr;
    uint8 *target_addr;
    uint32 *frame_sp;
    uint32 cell_num;
} WASMBranchBlock;

/* Execution environment, e.g. stack info */
/**
 * Align an unsigned value on a alignment boundary.
 *
 * @param v the value to be aligned
 * @param b the alignment boundary (2, 4, 8, ...)
 *
 * @return the aligned value
 */
inline static unsigned
align_uint(unsigned v, unsigned b)
{
    unsigned m = b - 1;
    return (v + m) & ~m;
}

/**
 * Return the hash value of c string.
 */
inline static uint32
wasm_string_hash(const char *str)
{
    unsigned h = (unsigned)strlen(str);
    const uint8 *p = (uint8 *)str;
    const uint8 *end = p + h;

    while (p != end)
        h = ((h << 5) - h) + *p++;
    return h;
}

/**
 * Whether two c strings are equal.
 */
inline static bool
wasm_string_equal(const char *s1, const char *s2)
{
    return strcmp(s1, s2) == 0 ? true : false;
}

/**
 * Return the byte size of value type.
 */
inline static uint32
wasm_value_type_size(uint8 value_type)
{
    if (value_type == VALUE_TYPE_VOID)
        return 0;
    else if (value_type == VALUE_TYPE_I32 || value_type == VALUE_TYPE_F32
             || value_type == VALUE_TYPE_ANY)
        return sizeof(int32);
    else if (value_type == VALUE_TYPE_I64 || value_type == VALUE_TYPE_F64)
        return sizeof(int64);
#if WASM_ENABLE_SIMD != 0
    else if (value_type == VALUE_TYPE_V128)
        return sizeof(int64) * 2;
#endif
#if WASM_ENABLE_GC != 0
    else if (value_type >= (uint8)REF_TYPE_ARRAYREF
             && value_type <= (uint8)REF_TYPE_FUNCREF)
        return sizeof(uintptr_t);
#elif WASM_ENABLE_REF_TYPES != 0
    else if (value_type == VALUE_TYPE_FUNCREF
             || value_type == VALUE_TYPE_EXTERNREF)
        return sizeof(uint32);
#endif
    else {
        bh_assert(0);
    }
    return 0;
}

inline static uint16
wasm_value_type_cell_num(uint8 value_type)
{
    return wasm_value_type_size(value_type) / 4;
}

inline static uint32
wasm_get_cell_num(const uint8 *types, uint32 type_count)
{
    uint32 cell_num = 0;
    uint32 i;
    for (i = 0; i < type_count; i++)
        cell_num += wasm_value_type_cell_num(types[i]);
    return cell_num;
}

#if WASM_ENABLE_REF_TYPES != 0
inline static uint16
wasm_value_type_cell_num_outside(uint8 value_type)
{
    if (VALUE_TYPE_EXTERNREF == value_type) {
        return sizeof(uintptr_t) / sizeof(uint32);
    }
    else {
        return wasm_value_type_cell_num(value_type);
    }
}
#endif

#if WASM_ENABLE_GC == 0
inline static bool
wasm_type_equal(const WASMType *type1, const WASMType *type2,
                const WASMTypePtr *types, uint32 type_count)
{
    const WASMFuncType *func_type1 = (const WASMFuncType *)type1;
    const WASMFuncType *func_type2 = (const WASMFuncType *)type2;
    return (func_type1->param_count == func_type2->param_count
            && func_type1->result_count == func_type2->result_count
            && memcmp(
                   func_type1->types, func_type2->types,
                   (uint32)(func_type1->param_count + func_type1->result_count))
                   == 0)
               ? true
               : false;
    (void)types;
    (void)type_count;
}
#else
/* implemented in ../common/gc */
bool
wasm_type_equal(const WASMType *type1, const WASMType *type2,
                const WASMTypePtr *types, uint32 type_count);
#endif

inline static uint32
wasm_get_smallest_type_idx(const WASMTypePtr *types, uint32 type_count,
                           uint32 cur_type_idx)
{
    uint32 i;

    for (i = 0; i < cur_type_idx; i++) {
        if (wasm_type_equal(types[cur_type_idx], types[i], types, type_count))
            return i;
    }
    return cur_type_idx;
}

#if WASM_ENABLE_GC == 0
static inline uint32
block_type_get_param_types(BlockType *block_type, uint8 **p_param_types)
#else
static inline uint32
block_type_get_param_types(BlockType *block_type, uint8 **p_param_types,
                           WASMRefTypeMap **p_param_reftype_maps,
                           uint32 *p_param_reftype_map_count)
#endif
{
    uint32 param_count = 0;
    if (!block_type->is_value_type) {
        WASMFuncType *func_type = block_type->u.type;
        *p_param_types = func_type->types;
        param_count = func_type->param_count;
#if WASM_ENABLE_GC != 0
        *p_param_reftype_maps = func_type->ref_type_maps;
        *p_param_reftype_map_count =
            func_type->result_ref_type_maps - func_type->ref_type_maps;
#endif
    }
    else {
        *p_param_types = NULL;
        param_count = 0;
#if WASM_ENABLE_GC != 0
        *p_param_reftype_maps = NULL;
        *p_param_reftype_map_count = 0;
#endif
    }

    return param_count;
}

#if WASM_ENABLE_GC == 0
static inline uint32
block_type_get_result_types(BlockType *block_type, uint8 **p_result_types)
#else
static inline uint32
block_type_get_result_types(BlockType *block_type, uint8 **p_result_types,
                            WASMRefTypeMap **p_result_reftype_maps,
                            uint32 *p_result_reftype_map_count)
#endif
{
    uint32 result_count = 0;
    uint8 *result_types = NULL;
#if WASM_ENABLE_GC != 0
    uint8 type;
    uint32 result_reftype_map_count = 0;
    WASMRefTypeMap *result_reftype_maps = NULL;
#endif

    if (block_type->is_value_type) {
        if (block_type->u.value_type.type != VALUE_TYPE_VOID) {
            result_types = &block_type->u.value_type.type;
            result_count = 1;
#if WASM_ENABLE_GC != 0
            type = block_type->u.value_type.type;
            if ((type == (uint8)REF_TYPE_HT_NULLABLE
                 || type == (uint8)REF_TYPE_HT_NON_NULLABLE
                 || type == (uint8)REF_TYPE_RTTN
                 || type == (uint8)REF_TYPE_RTT)) {
                result_reftype_maps = &block_type->u.value_type.ref_type_map;
                result_reftype_map_count = 1;
            }
#endif
        }
    }
    else {
        WASMFuncType *func_type = block_type->u.type;
        result_types = func_type->types + func_type->param_count;
        result_count = func_type->result_count;
#if WASM_ENABLE_GC != 0
        result_reftype_maps = func_type->result_ref_type_maps;
        result_reftype_map_count = (uint32)(func_type->ref_type_map_count
                                            - (func_type->result_ref_type_maps
                                               - func_type->ref_type_maps));
#endif
    }
    *p_result_types = result_types;
#if WASM_ENABLE_GC != 0
    *p_result_reftype_maps = result_reftype_maps;
    *p_result_reftype_map_count = result_reftype_map_count;
#endif
    return result_count;
}

static inline uint32
block_type_get_arity(const BlockType *block_type, uint8 label_type)
{
    if (label_type == LABEL_TYPE_LOOP) {
        if (block_type->is_value_type)
            return 0;
        else
            return block_type->u.type->param_count;
    }
    else {
        if (block_type->is_value_type) {
            return block_type->u.value_type.type != VALUE_TYPE_VOID ? 1 : 0;
        }
        else
            return block_type->u.type->result_count;
    }
    return 0;
}

#ifdef __cplusplus
} /* end of extern "C" */
#endif

#endif /* end of _WASM_H_ */