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Delete obsolete dump_cinit.lua.

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pull/13171/head
Joshua Haberman 6 years ago
parent f4532ab273
commit 0517c462e6
1 changed files with 0 additions and 751 deletions
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      tools/dump_cinit.lua

751
tools/dump_cinit.lua
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--[[
Routines for dumping internal data structures into C initializers
that can be compiled into a .o file.
--]]
local upbtable = require "upb.table"
local upb = require "upb"
local export = {}
-- A tiny little abstraction that decouples the dump_* functions from
-- what they're writing to (appending to a string, writing to file I/O, etc).
-- This could possibly matter since naive string building is O(n^2) in the
-- number of appends.
function export.str_appender()
local str = ""
local function append(fmt, ...)
str = str .. string.format(fmt, ...)
end
local function get()
return str
end
return append, get
end
function export.file_appender(file)
local f = file
local function append(fmt, ...)
f:write(string.format(fmt, ...))
end
return append
end
function handler_types(base)
local ret = {}
for k, _ in pairs(base) do
if string.find(k, "^" .. "HANDLER_") then
ret[#ret + 1] = k
end
end
return ret
end
function octchar(num)
assert(num < 8)
local idx = num + 1 -- 1-based index
return string.sub("01234567", idx, idx)
end
function c_escape(num)
assert(num < 256)
return string.format("\\%s%s%s",
octchar(math.floor(num / 64)),
octchar(math.floor(num / 8) % 8),
octchar(num % 8));
end
-- const(f, label) -> UPB_LABEL_REPEATED, where f:label() == upb.LABEL_REPEATED
function const(obj, name, base)
local val = obj[name]
base = base or upb
-- Support both f:label() and f.label.
if type(val) == "function" then
val = val(obj)
end
for k, v in pairs(base) do
if v == val and string.find(k, "^" .. string.upper(name)) then
return "UPB_" .. k
end
end
assert(false, "Couldn't find UPB_" .. string.upper(name) ..
" constant for value: " .. val)
end
function sortedkeys(tab)
arr = {}
for key in pairs(tab) do
arr[#arr + 1] = key
end
table.sort(arr)
return arr
end
function sorted_defs(defs)
local sorted = {}
for def in defs do
if def.type == deftype then
sorted[#sorted + 1] = def
end
end
table.sort(sorted,
function(a, b) return a:full_name() < b:full_name() end)
return sorted
end
function constlist(pattern)
local ret = {}
for k, v in pairs(upb) do
if string.find(k, "^" .. pattern) then
ret[k] = v
end
end
return ret
end
function boolstr(val)
if val == true then
return "true"
elseif val == false then
return "false"
else
assert(false, "Bad bool value: " .. tostring(val))
end
end
--[[
LinkTable: an object that tracks all linkable objects and their offsets to
facilitate linking.
--]]
local LinkTable = {}
function LinkTable:new(types)
local linktab = {
types = types,
table = {}, -- ptr -> {type, 0-based offset}
obj_arrays = {} -- Establishes the ordering for each object type
}
for type, _ in pairs(types) do
linktab.obj_arrays[type] = {}
end
setmetatable(linktab, {__index = LinkTable}) -- Inheritance
return linktab
end
-- Adds a new object to the sequence of objects of this type.
function LinkTable:add(objtype, ptr, obj)
obj = obj or ptr
assert(self.table[obj] == nil)
assert(self.types[objtype])
local arr = self.obj_arrays[objtype]
self.table[ptr] = {objtype, #arr}
arr[#arr + 1] = obj
end
-- Returns a C symbol name for the given objtype and offset.
function LinkTable:csym(objtype, offset)
local typestr = assert(self.types[objtype])
return string.format("%s[%d]", typestr, offset)
end
-- Returns the address of the given C object.
function LinkTable:addr(obj)
if obj == upbtable.NULL then
return "NULL"
else
local tabent = assert(self.table[obj], "unknown object: " .. tostring(obj))
return "&" .. self:csym(tabent[1], tabent[2])
end
end
-- Returns an array declarator indicating how many objects have been added.
function LinkTable:cdecl(objtype)
return self:csym(objtype, #self.obj_arrays[objtype])
end
function LinkTable:objs(objtype)
-- Return iterator function, allowing use as:
-- for obj in linktable:objs(type) do
-- -- ...
-- done
local array = self.obj_arrays[objtype]
local i = 0
return function()
i = i + 1
if array[i] then return array[i] end
end
end
function LinkTable:empty(objtype)
return #self.obj_arrays[objtype] == 0
end
--[[
Dumper: an object that can dump C initializers for several constructs.
Uses a LinkTable to resolve references when necessary.
--]]
local Dumper = {}
function Dumper:new(linktab)
local obj = {linktab = linktab}
setmetatable(obj, {__index = Dumper}) -- Inheritance
return obj
end
-- Dumps a upb_tabval, eg:
-- UPB_TABVALUE_INIT(5)
function Dumper:_value(val, upbtype)
if type(val) == "nil" then
return "UPB_TABVALUE_EMPTY_INIT"
elseif type(val) == "number" then
-- Use upbtype to disambiguate what kind of number it is.
if upbtype == upbtable.CTYPE_INT32 then
return string.format("UPB_TABVALUE_INT_INIT(%d)", val)
else
-- TODO(haberman): add support for these so we can properly support
-- default values.
error("Unsupported number type " .. upbtype)
end
elseif type(val) == "string" then
return string.format('UPB_TABVALUE_PTR_INIT("%s")', val)
else
-- We take this as an object reference that has an entry in the link table.
return string.format("UPB_TABVALUE_PTR_INIT(%s)", self.linktab:addr(val))
end
end
-- Dumps a table key.
function Dumper:tabkey(key)
if type(key) == "nil" then
return "UPB_TABKEY_NONE"
elseif type(key) == "string" then
local len = #key
local len1 = c_escape(len % 256)
local len2 = c_escape(math.floor(len / 256) % 256)
local len3 = c_escape(math.floor(len / (256 * 256)) % 256)
local len4 = c_escape(math.floor(len / (256 * 256 * 256)) % 256)
return string.format('UPB_TABKEY_STR("%s", "%s", "%s", "%s", "%s")',
len1, len2, len3, len4, key)
else
return string.format("UPB_TABKEY_NUM(%d)", key)
end
end
-- Dumps a table entry.
function Dumper:tabent(ent)
local key = self:tabkey(ent.key)
local val = self:_value(ent.value, ent.valtype)
local next = self.linktab:addr(ent.next)
return string.format(' {%s, %s, %s},\n', key, val, next)
end
-- Dumps an inttable array entry. This is almost the same as value() above,
-- except that nil values have a special value to indicate "empty".
function Dumper:arrayval(val)
if val.val then
return string.format(" %s,\n", self:_value(val.val, val.valtype))
else
return " UPB_TABVALUE_EMPTY_INIT,\n"
end
end
-- Dumps an initializer for the given strtable/inttable (respectively). Its
-- entries must have previously been added to the linktable.
function Dumper:strtable(t)
-- UPB_STRTABLE_INIT(count, mask, type, size_lg2, entries)
return string.format(
"UPB_STRTABLE_INIT(%d, %d, %s, %d, %s)",
t.count, t.mask, const(t, "ctype", upbtable) , t.size_lg2,
self.linktab:addr(t.entries[1].ptr))
end
function Dumper:inttable(t)
local lt = assert(self.linktab)
-- UPB_INTTABLE_INIT(count, mask, type, size_lg2, ent, a, asize, acount)
local entries = "NULL"
if #t.entries > 0 then
entries = lt:addr(t.entries[1].ptr)
end
return string.format(
"UPB_INTTABLE_INIT(%d, %d, %s, %d, %s, %s, %d, %d)",
t.count, t.mask, const(t, "ctype", upbtable), t.size_lg2, entries,
lt:addr(t.array[1].ptr), t.array_size, t.array_count)
end
-- A visitor for visiting all tables of a def. Used first to count entries
-- and later to dump them.
local function gettables(def)
if def:def_type() == upb.DEF_MSG then
return {int = upbtable.msgdef_itof(def), str = upbtable.msgdef_ntof(def)}
elseif def:def_type() == upb.DEF_ENUM then
return {int = upbtable.enumdef_iton(def), str = upbtable.enumdef_ntoi(def)}
end
end
local function emit_file_warning(filedef, append)
append('/* This file was generated by upbc (the upb compiler) from the input\n')
append(' * file:\n')
append(' *\n')
append(' * %s\n', filedef:name())
append(' *\n')
append(' * Do not edit -- your changes will be discarded when the file is\n')
append(' * regenerated. */\n\n')
end
local function join(...)
return table.concat({...}, ".")
end
local function split(str)
local ret = {}
for word in string.gmatch(str, "%w+") do
table.insert(ret, word)
end
return ret
end
local function to_cident(...)
return string.gsub(join(...), "[%./]", "_")
end
local function to_preproc(...)
return string.upper(to_cident(...))
end
-- Strips away last path element, ie:
-- foo.Bar.Baz -> foo.Bar
local function remove_name(name)
local package_end = 0
for i=1,string.len(name) do
if string.byte(name, i) == string.byte(".", 1) then
package_end = i - 1
end
end
return string.sub(name, 1, package_end)
end
local function start_namespace(package, append)
local package_components = split(package)
for _, component in ipairs(package_components) do
append("namespace %s {\n", component)
end
end
local function end_namespace(package, append)
local package_components = split(package)
for i=#package_components,1,-1 do
append("} /* namespace %s */\n", package_components[i])
end
end
local function well_known_type(m)
local type_map = {}
type_map["google.protobuf.Any"] = "UPB_WELLKNOWN_ANY"
type_map["google.protobuf.FieldMask"] = "UPB_WELLKNOWN_FIELDMASK"
type_map["google.protobuf.Duration"] = "UPB_WELLKNOWN_DURATION"
type_map["google.protobuf.Timestamp"] = "UPB_WELLKNOWN_TIMESTAMP"
type_map["google.protobuf.Value"] = "UPB_WELLKNOWN_VALUE"
type_map["google.protobuf.ListValue"] = "UPB_WELLKNOWN_LISTVALUE"
type_map["google.protobuf.Struct"] = "UPB_WELLKNOWN_STRUCT"
type_map["google.protobuf.DoubleValue"] = "UPB_WELLKNOWN_DOUBLEVALUE"
type_map["google.protobuf.FloatValue"] = "UPB_WELLKNOWN_FLOATVALUE"
type_map["google.protobuf.Int64Value"] = "UPB_WELLKNOWN_INT64VALUE"
type_map["google.protobuf.UInt64Value"] = "UPB_WELLKNOWN_UINT64VALUE"
type_map["google.protobuf.Int32Value"] = "UPB_WELLKNOWN_INT32VALUE"
type_map["google.protobuf.UInt32Value"] = "UPB_WELLKNOWN_UINT32VALUE"
type_map["google.protobuf.BoolValue"] = "UPB_WELLKNOWN_BOOLVALUE"
type_map["google.protobuf.StringValue"] = "UPB_WELLKNOWN_STRINGVALUE"
type_map["google.protobuf.BytesValue"] = "UPB_WELLKNOWN_BYTESVALUE"
local t = type_map[m:full_name()]
if (t == nil) then
t = "UPB_WELLKNOWN_UNSPECIFIED"
end
return t
end
--[[
Top-level, exported dumper functions
--]]
local function dump_defs_c(filedef, append)
local defs = {}
for def in filedef:defs(upb.DEF_ANY) do
defs[#defs + 1] = def
if (def:def_type() == upb.DEF_MSG) then
for field in def:fields() do
defs[#defs + 1] = field
end
end
end
-- Sort all defs by (type, name).
-- This gives us a linear ordering that we can use to create offsets into
-- shared arrays like REFTABLES, hash table entries, and arrays.
table.sort(defs, function(a, b)
if a:def_type() ~= b:def_type() then
return a:def_type() < b:def_type()
else
return a:full_name() < b:full_name() end
end
)
-- Perform pre-pass to build the link table.
local linktab = LinkTable:new{
[upb.DEF_MSG] = "msgs",
[upb.DEF_FIELD] = "fields",
[upb.DEF_ENUM] = "enums",
intentries = "intentries",
strentries = "strentries",
arrays = "arrays",
}
local reftable_count = 0
for _, def in ipairs(defs) do
assert(def:is_frozen(), "can only dump frozen defs.")
linktab:add(def:def_type(), def)
reftable_count = reftable_count + 2
local tables = gettables(def)
if tables then
for _, e in ipairs(tables.str.entries) do
linktab:add("strentries", e.ptr, e)
end
for _, e in ipairs(tables.int.entries) do
linktab:add("intentries", e.ptr, e)
end
for _, e in ipairs(tables.int.array) do
linktab:add("arrays", e.ptr, e)
end
end
end
-- Emit forward declarations.
emit_file_warning(filedef, append)
append('#include "upb/def.h"\n')
append('#include "upb/structdefs.int.h"\n\n')
append("static const upb_msgdef %s;\n", linktab:cdecl(upb.DEF_MSG))
append("static const upb_fielddef %s;\n", linktab:cdecl(upb.DEF_FIELD))
if not linktab:empty(upb.DEF_ENUM) then
append("static const upb_enumdef %s;\n", linktab:cdecl(upb.DEF_ENUM))
end
append("static const upb_tabent %s;\n", linktab:cdecl("strentries"))
if not linktab:empty("intentries") then
append("static const upb_tabent %s;\n", linktab:cdecl("intentries"))
end
append("static const upb_tabval %s;\n", linktab:cdecl("arrays"))
append("\n")
append("#ifdef UPB_DEBUG_REFS\n")
append("static upb_inttable reftables[%d];\n", reftable_count)
append("#endif\n")
append("\n")
-- Emit defs.
local dumper = Dumper:new(linktab)
local reftable = 0
append("static const upb_msgdef %s = {\n", linktab:cdecl(upb.DEF_MSG))
for m in linktab:objs(upb.DEF_MSG) do
local tables = gettables(m)
-- UPB_MSGDEF_INIT(name, selector_count, submsg_field_count, itof, ntof,
-- refs, ref2s)
append(' UPB_MSGDEF_INIT("%s", %d, %d, %s, %s, %s, %s, %s,' ..
' &reftables[%d], &reftables[%d]),\n',
m:full_name(),
upbtable.msgdef_selector_count(m),
upbtable.msgdef_submsg_field_count(m),
dumper:inttable(tables.int),
dumper:strtable(tables.str),
boolstr(m:_map_entry()),
const(m, "syntax"),
well_known_type(m),
reftable, reftable + 1)
reftable = reftable + 2
end
append("};\n\n")
append("static const upb_fielddef %s = {\n", linktab:cdecl(upb.DEF_FIELD))
for f in linktab:objs(upb.DEF_FIELD) do
local subdef = "NULL"
if f:has_subdef() then
subdef = string.format("(const upb_def*)(%s)", linktab:addr(f:subdef()))
end
local intfmt
if f:type() == upb.TYPE_UINT32 or
f:type() == upb.TYPE_INT32 or
f:type() == upb.TYPE_UINT64 or
f:type() == upb.TYPE_INT64 then
intfmt = const(f, "intfmt")
else
intfmt = "0"
end
-- UPB_FIELDDEF_INIT(label, type, intfmt, tagdelim, is_extension, lazy,
-- packed, name, num, msgdef, subdef, selector_base,
-- index, -- default_value)
append(' UPB_FIELDDEF_INIT(%s, %s, %s, %s, %s, %s, %s, "%s", %d, %s, ' ..
'%s, %d, %d, {0},' .. -- TODO: support default value
'&reftables[%d], &reftables[%d]),\n',
const(f, "label"), const(f, "type"), intfmt,
boolstr(f:istagdelim()), boolstr(f:is_extension()),
boolstr(f:lazy()), boolstr(f:packed()), f:name(), f:number(),
linktab:addr(f:containing_type()), subdef,
upbtable.fielddef_selector_base(f), f:index(),
reftable, reftable + 1
)
reftable = reftable + 2
end
append("};\n\n")
if not linktab:empty(upb.DEF_ENUM) then
append("static const upb_enumdef %s = {\n", linktab:cdecl(upb.DEF_ENUM))
for e in linktab:objs(upb.DEF_ENUM) do
local tables = gettables(e)
-- UPB_ENUMDEF_INIT(name, ntoi, iton, defaultval)
append(' UPB_ENUMDEF_INIT("%s", %s, %s, %d, ' ..
'&reftables[%d], &reftables[%d]),\n',
e:full_name(),
dumper:strtable(tables.str),
dumper:inttable(tables.int),
--e:default())
0,
reftable, reftable + 1)
reftable = reftable + 2
end
append("};\n\n")
end
append("static const upb_tabent %s = {\n", linktab:cdecl("strentries"))
for ent in linktab:objs("strentries") do
append(dumper:tabent(ent))
end
append("};\n\n");
if not linktab:empty("intentries") then
append("static const upb_tabent %s = {\n", linktab:cdecl("intentries"))
for ent in linktab:objs("intentries") do
append(dumper:tabent(ent))
end
append("};\n\n");
end
append("static const upb_tabval %s = {\n", linktab:cdecl("arrays"))
for ent in linktab:objs("arrays") do
append(dumper:arrayval(ent))
end
append("};\n\n");
append("#ifdef UPB_DEBUG_REFS\n")
append("static upb_inttable reftables[%d] = {\n", reftable_count)
for i = 1,reftable_count do
append(" UPB_EMPTY_INTTABLE_INIT(UPB_CTYPE_PTR),\n")
end
append("};\n")
append("#endif\n\n")
append("static const upb_msgdef *refm(const upb_msgdef *m, const void *owner) {\n")
append(" upb_msgdef_ref(m, owner);\n")
append(" return m;\n")
append("}\n\n")
append("static const upb_enumdef *refe(const upb_enumdef *e, const void *owner) {\n")
append(" upb_enumdef_ref(e, owner);\n")
append(" return e;\n")
append("}\n\n")
append("/* Public API. */\n")
for m in linktab:objs(upb.DEF_MSG) do
append("const upb_msgdef *upbdefs_%s_get(const void *owner)" ..
" { return refm(%s, owner); }\n",
to_cident(m:full_name()), linktab:addr(m))
end
append("\n")
for e in linktab:objs(upb.DEF_ENUM) do
append("const upb_enumdef *upbdefs_%s_get(const void *owner)" ..
" { return refe(%s, owner); }\n",
to_cident(e:full_name()), linktab:addr(e))
end
return linktab
end
local function dump_defs_for_type(format, defs, append)
local sorted = sorted_defs(defs)
for _, def in ipairs(sorted) do
append(format, to_cident(def:full_name()), def:full_name())
end
append("\n")
end
local function make_children_map(file)
-- Maps file:package() or msg:full_name() -> children.
local map = {}
for def in file:defs(upb.DEF_ANY) do
local container = remove_name(def:full_name())
if not map[container] then
map[container] = {}
end
table.insert(map[container], def)
end
-- Sort all the lists for a consistent ordering.
for name, children in pairs(map) do
table.sort(children, function(a, b) return a:name() < b:name() end)
end
return map
end
local print_classes
local function print_message(def, map, indent, append)
append("\n")
append("%sclass %s : public ::upb::reffed_ptr<const ::upb::MessageDef> {\n",
indent, def:name())
append("%s public:\n", indent)
append("%s %s(const ::upb::MessageDef* m, const void *ref_donor = NULL)\n",
indent, def:name())
append("%s : reffed_ptr(m, ref_donor) {\n", indent)
append("%s UPB_ASSERT(upbdefs_%s_is(m));\n", indent, to_cident(def:full_name()))
append("%s }\n", indent)
append("\n")
append("%s static %s get() {\n", indent, def:name())
append("%s const ::upb::MessageDef* m = upbdefs_%s_get(&m);\n", indent, to_cident(def:full_name()))
append("%s return %s(m, &m);\n", indent, def:name())
append("%s }\n", indent)
-- TODO(haberman): add fields
print_classes(def:full_name(), map, indent .. " ", append)
append("%s};\n", indent)
end
local function print_enum(def, indent, append)
append("\n")
append("%sclass %s : public ::upb::reffed_ptr<const ::upb::EnumDef> {\n",
indent, def:name())
append("%s public:\n", indent)
append("%s %s(const ::upb::EnumDef* e, const void *ref_donor = NULL)\n",
indent, def:name())
append("%s : reffed_ptr(e, ref_donor) {\n", indent)
append("%s UPB_ASSERT(upbdefs_%s_is(e));\n", indent, to_cident(def:full_name()))
append("%s }\n", indent)
append("%s static %s get() {\n", indent, def:name())
append("%s const ::upb::EnumDef* e = upbdefs_%s_get(&e);\n", indent, to_cident(def:full_name()))
append("%s return %s(e, &e);\n", indent, def:name())
append("%s }\n", indent)
append("%s};\n", indent)
end
function print_classes(name, map, indent, append)
if not map[name] then
return
end
for _, def in ipairs(map[name]) do
if def:def_type() == upb.DEF_MSG then
print_message(def, map, indent, append)
elseif def:def_type() == upb.DEF_ENUM then
print_enum(def, indent, append)
else
error("Unknown def type for " .. def:full_name())
end
end
end
local function dump_defs_h(file, append, linktab)
local basename_preproc = to_preproc(file:name())
append("/* This file contains accessors for a set of compiled-in defs.\n")
append(" * Note that unlike Google's protobuf, it does *not* define\n")
append(" * generated classes or any other kind of data structure for\n")
append(" * actually storing protobufs. It only contains *defs* which\n")
append(" * let you reflect over a protobuf *schema*.\n")
append(" */\n")
emit_file_warning(file, append)
append('#ifndef %s_UPB_H_\n', basename_preproc)
append('#define %s_UPB_H_\n\n', basename_preproc)
append('#include "upb/def.h"\n\n')
append('UPB_BEGIN_EXTERN_C\n\n')
-- Dump C enums for proto enums.
append("/* MessageDefs: call these functions to get a ref to a msgdef. */\n")
dump_defs_for_type(
"const upb_msgdef *upbdefs_%s_get(const void *owner);\n",
file:defs(upb.DEF_MSG), append)
append("/* EnumDefs: call these functions to get a ref to an enumdef. */\n")
dump_defs_for_type(
"const upb_enumdef *upbdefs_%s_get(const void *owner);\n",
file:defs(upb.DEF_ENUM), append)
append("/* Functions to test whether this message is of a certain type. */\n")
dump_defs_for_type(
"UPB_INLINE bool upbdefs_%s_is(const upb_msgdef *m) {\n" ..
" return strcmp(upb_msgdef_fullname(m), \"%s\") == 0;\n}\n",
file:defs(upb.DEF_MSG), append)
append("/* Functions to test whether this enum is of a certain type. */\n")
dump_defs_for_type(
"UPB_INLINE bool upbdefs_%s_is(const upb_enumdef *e) {\n" ..
" return strcmp(upb_enumdef_fullname(e), \"%s\") == 0;\n}\n",
file:defs(upb.DEF_ENUM), append)
append("\n")
-- fields
local fields = {}
for f in linktab:objs(upb.DEF_FIELD) do
local symname = f:containing_type():full_name() .. "." .. f:name()
fields[#fields + 1] = {to_cident(symname), f}
end
table.sort(fields, function(a, b) return a[1] < b[1] end)
append("/* Functions to get a fielddef from a msgdef reference. */\n")
for _, field in ipairs(fields) do
local f = field[2]
local msg_cident = to_cident(f:containing_type():full_name())
local field_cident = to_cident(f:name())
append("UPB_INLINE const upb_fielddef *upbdefs_%s_f_%s(const upb_msgdef *m) {" ..
" UPB_ASSERT(upbdefs_%s_is(m));" ..
" return upb_msgdef_itof(m, %d); }\n",
msg_cident, field_cident, msg_cident, f:number())
end
append('\nUPB_END_EXTERN_C\n\n')
-- C++ wrappers.
local children_map = make_children_map(file)
append("#ifdef __cplusplus\n\n")
append("namespace upbdefs {\n")
start_namespace(file:package(), append)
print_classes(file:package(), children_map, "", append)
append("\n")
end_namespace(file:package(), append)
append("} /* namespace upbdefs */\n\n")
append("#endif /* __cplusplus */\n")
append("\n")
append('#endif /* %s_UPB_H_ */\n', basename_preproc)
end
function export.dump_defs(filedef, append_h, append_c)
local linktab = dump_defs_c(filedef, append_c)
dump_defs_h(filedef, append_h, linktab)
end
return export
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