//// Dis VM// File: sys_utils.h// Author: arr// #ifndef _DISVM_SRC_VM_SYS_SYS_UTILS_H_#define _DISVM_SRC_VM_SYS_SYS_UTILS_H_ #include <vector>#include <iosfwd>#include <memory>#include <disvm.h>#include <utils.h> namespace disvm{    namespace runtime    {        namespace sys        {            // Prints the format and arguments to the supplied buffer.            // Returns the number of bytes written.            word_t printf_to_buffer(                const vm_string_t &msg_fmt,                byte_t *msg_args,                pointer_t base,                const std::size_t buffer_size,                char *buffer);             // Prints the format and arguments to the supplied dynamic buffer.            // Returns the number of bytes written.            word_t printf_to_dynamic_buffer(                const vm_string_t &msg_fmt,                byte_t *msg_args,                pointer_t base,                std::vector<char> &buffer);             enum class cfs_flags_t            {                none,                atomic,                ensure_create,            };             DEFINE_ENUM_FLAG_OPERATORS(cfs_flags_t);             std::unique_ptr<std::fstream> create_file_stream(const char *path, std::ios::openmode mode, cfs_flags_t flags = sys::cfs_flags_t::none);             const word_t vm_invalid_fd = -1;             // The first three FD records are optimized for lock-less access.            word_t create_fd_record(vm_alloc_t *fd_alloc);             vm_alloc_t * fetch_fd_record(word_t fd);             void drop_fd_record(word_t fd);         }    }} #endif // _DISVM_SRC_VM_SYS_SYS_UTILS_H_