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-- 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