Update Zig binding generation (#2765)
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Jared Miller
GitHub
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@ -13,6 +13,8 @@ local zig_template = [[
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const std = @import("std");
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pub const ViewId = u16;
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$types
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$funcs
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@ -31,8 +33,17 @@ local function hasSuffix(str, suffix)
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return suffix == "" or str:sub(- #suffix) == suffix
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end
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local function convert_type_0(arg)
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local enum = { }
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local function convert_array(member)
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if string.find(member.array, "::") then
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return string.format("[%s]", enum[member.array])
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else
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return member.array
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end
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end
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local function convert_type_0(arg)
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if hasPrefix(arg.ctype, "uint64_t") then
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return arg.ctype:gsub("uint64_t", "u64")
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elseif hasPrefix(arg.ctype, "int64_t") then
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@ -43,18 +54,14 @@ local function convert_type_0(arg)
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return arg.ctype:gsub("int32_t", "i32")
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elseif hasPrefix(arg.ctype, "uint16_t") then
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return arg.ctype:gsub("uint16_t", "u16")
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elseif hasPrefix(arg.ctype, "bgfx_view_id_t") then
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return arg.ctype:gsub("bgfx_view_id_t", "u16")
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elseif hasPrefix(arg.ctype, "uint8_t") then
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return arg.ctype:gsub("uint8_t", "u8")
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elseif hasPrefix(arg.ctype, "uintptr_t") then
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return arg.ctype:gsub("uintptr_t", "usize")
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elseif hasPrefix(arg.ctype, "float") then
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return arg.ctype:gsub("float", "f32")
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-- elseif arg.ctype == "bgfx_caps_gpu_t" then
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-- return arg.ctype:gsub("bgfx_caps_gpu_t", "u32")
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elseif arg.ctype == "const char*" then
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return "[*c]const u8"
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return "[*c]const u8"
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elseif hasPrefix(arg.ctype, "char") then
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return arg.ctype:gsub("char", "u8")
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elseif hasSuffix(arg.fulltype, "Handle") then
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@ -66,8 +73,6 @@ local function convert_type_0(arg)
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or arg.fulltype == "CallbackI*"
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or arg.fulltype == "ReleaseFn" then
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return "?*anyopaque"
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elseif arg.fulltype == "const ViewId*" then
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return "[*c]c_ushort"
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end
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return arg.fulltype
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@ -80,24 +85,25 @@ local function convert_type(arg)
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ctype = ctype:gsub("&", "*")
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ctype = ctype:gsub("char", "u8")
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ctype = ctype:gsub("float", "f32")
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if hasPrefix(ctype, "const ") then
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ctype = ctype:gsub("const ", "")
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end
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ctype = ctype:gsub("const void%*", "?*const anyopaque")
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ctype = ctype:gsub("Encoder%*", "?*Encoder")
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if hasSuffix(ctype, "void*") then
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ctype = ctype:gsub("void%*", "?*anyopaque");
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elseif hasSuffix(ctype, "*") then
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ctype = "[*c]" .. ctype:gsub("*", "")
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end
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if arg.array ~= nil then
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ctype = ctype:gsub("const ", "")
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ctype = convert_array(arg) .. ctype
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end
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return ctype
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end
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local function convert_struct_type(arg)
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local ctype = convert_type(arg)
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if hasPrefix(arg.ctype, "bool") then
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ctype = ctype:gsub("bool", "bool")
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end
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return ctype
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return convert_type(arg)
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end
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local function convert_ret_type(arg)
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@ -106,10 +112,10 @@ end
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local converter = {}
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local yield = coroutine.yield
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local indent = ""
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local gen = {}
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local indent = ""
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function gen.gen()
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local r = zig_template:gsub("$(%l+)", function(what)
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local tmp = {}
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@ -134,10 +140,6 @@ function gen.gen()
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return r
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end
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-- function gen.gen_dllname()
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-- return csharp_dllname_template
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-- end
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local combined = { "State", "Stencil", "Buffer", "Texture", "Sampler", "Reset" }
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for _, v in ipairs(combined) do
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@ -145,39 +147,40 @@ for _, v in ipairs(combined) do
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end
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local lastCombinedFlag
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local function FlagBlock(typ)
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local format = "0x%08x"
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local enumType = "c_uint"
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local enumType = "u32"
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if typ.bits == 64 then
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format = "0x%016x"
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enumType = "c_ulong"
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enumType = "u64"
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elseif typ.bits == 16 then
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format = "0x%04x"
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enumType = "c_ushort"
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enumType = "u16"
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end
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yield("pub const " .. typ.name .. "Flags = enum(" .. enumType .. ") {")
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local name = typ.name .. "Flags"
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yield("pub const " .. name .. " = " .. enumType .. ";")
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for idx, flag in ipairs(typ.flag) do
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if flag.comment ~= nil then
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if idx ~= 1 then
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yield("")
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end
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for _, comment in ipairs(flag.comment) do
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yield(" /// " .. comment)
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yield("/// " .. comment)
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end
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end
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local flagName = flag.name:gsub("_", "")
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yield(" "
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yield("pub const " .. name .. "_"
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.. flagName
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.. ": "
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.. name
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.. string.rep(" ", 22 - #(flagName))
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.. " = "
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.. string.format(flag.format or format, flag.value)
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.. ","
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.. ";"
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)
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end
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@ -199,8 +202,6 @@ local function FlagBlock(typ)
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.. string.format(format, flag.mask)
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)
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end
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yield("};")
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end
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local function lastCombinedFlagBlock()
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@ -214,22 +215,8 @@ local function lastCombinedFlagBlock()
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end
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end
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local enum = {}
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local function convert_array(member)
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if string.find(member.array, "::") then
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return string.format("[%d]", enum[member.array])
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else
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return member.array
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end
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end
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local function convert_struct_member(member)
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if member.array then
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return member.name .. ": " .. convert_array(member) .. convert_struct_type(member)
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else
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return member.name .. ": " .. convert_struct_type(member)
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end
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return member.name .. ": " .. convert_struct_type(member)
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end
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local namespace = ""
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@ -319,13 +306,11 @@ function converter.types(typ)
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FlagBlock(typ)
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end
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elseif typ.struct ~= nil then
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local skip = false
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if typ.namespace ~= nil then
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if namespace ~= typ.namespace then
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yield("pub const " .. typ.namespace .. " = extern struct {")
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-- yield("{")
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namespace = typ.namespace
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indent = " "
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end
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@ -336,14 +321,15 @@ function converter.types(typ)
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end
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if not skip then
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yield(indent .. "pub const " .. typ.name .. " = extern struct {")
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-- yield(indent .. "{")
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if typ.name ~= "Encoder" then
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yield(indent .. "pub const " .. typ.name .. " = extern struct {")
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else
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yield(indent .. "pub const " .. typ.name .. " = opaque {")
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end
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end
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for _, member in ipairs(typ.struct) do
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yield(
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indent .. indent .. convert_struct_member(member) .. ","
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)
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yield(indent .. indent .. convert_struct_member(member) .. ",")
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end
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yield(indent .. "};")
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@ -381,7 +367,15 @@ function converter.funcs(func)
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local args = {}
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if func.this ~= nil then
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args[1] = "self: [*c]" .. func.this_type.type
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local ptr = "[*c]"
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if func.const ~= nil then
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ptr = ptr .. "const "
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end
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if func.this_type.type == "Encoder" then
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ptr = "?*"
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end
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args[1] = "self: " .. ptr .. func.this_type.type
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end
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for _, arg in ipairs(func.args) do
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local argName = arg.name:gsub("_", "")
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@ -392,12 +386,9 @@ function converter.funcs(func)
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table.insert(args, convert_type(arg))
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end
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end
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yield("pub extern fn bgfx_" .. func.cname .. "(" .. table.concat(args, ", ") .. ") callconv(.C) " .. convert_ret_type(func.ret) .. ";")
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yield("pub extern fn bgfx_" .. func.cname .. "(" .. table.concat(args, ", ") .. ") " .. convert_ret_type(func.ret) .. ";")
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end
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-- printtable("idl types", idl.types)
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-- printtable("idl funcs", idl.funcs)
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function gen.write(codes, outputfile)
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local out = assert(io.open(outputfile, "wb"))
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out:write(codes)
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@ -406,7 +397,7 @@ function gen.write(codes, outputfile)
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end
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if (...) == nil then
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-- run `lua bindings-cs.lua` in command line
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-- run `lua bindings-zig.lua` in command line
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print(gen.gen())
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end
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