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-- Copyright (C) Yichun Zhang (agentzh)
local ffi = require "ffi"
local base = require "resty.core.base"
local C = ffi.C
local ffi_str = ffi.string
local ffi_copy = ffi.copy
local byte = string.byte
local str_find = string.find
local get_string_buf = base.get_string_buf
local subsystem = ngx.config.subsystem
local _M = {
version = base.version
}
if subsystem == "http" then
ffi.cdef[[
void ngx_http_lua_ffi_str_replace_char(unsigned char *buf, size_t len,
const unsigned char find, const unsigned char replace);
]]
function _M.str_replace_char(str, find, replace)
if not str_find(str, find, nil, true) then
return str
end
local len = #str
local buf = get_string_buf(len)
ffi_copy(buf, str, len)
C.ngx_http_lua_ffi_str_replace_char(buf, len, byte(find),
byte(replace))
return ffi_str(buf, len)
end
end
return _M
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