Edit File: string.lua
-- Copyright (C) by Yichun Zhang (agentzh) local ffi = require "ffi" local ffi_new = ffi.new local ffi_str = ffi.string local C = ffi.C --local setmetatable = setmetatable --local error = error local tonumber = tonumber local _M = { _VERSION = '0.16' } ffi.cdef[[ typedef unsigned char u_char; u_char * ngx_hex_dump(u_char *dst, const u_char *src, size_t len); intptr_t ngx_atoi(const unsigned char *line, size_t n); ]] local str_type = ffi.typeof("uint8_t[?]") local BUF_MAX_LEN = 1024 local hex_buf = ffi_new(str_type, BUF_MAX_LEN) function _M.to_hex(s) local len = #s local buf_len = len * 2 local buf if buf_len <= BUF_MAX_LEN then buf = hex_buf else buf = ffi_new(str_type, buf_len) end C.ngx_hex_dump(buf, s, len) return ffi_str(buf, buf_len) end function _M.atoi(s) return tonumber(C.ngx_atoi(s, #s)) end return _M