blob: a3523ebac34487278d4c4d3a4c415c1ca60d010b [file] [log] [blame]
// Protocol Buffers - Google's data interchange format
// Copyright 2023 Google LLC. All rights reserved.
//
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file or at
// https://developers.google.com/open-source/licenses/bsd
#include "upb_generator/code_generator_request.h"
#include <inttypes.h>
#include "google/protobuf/compiler/plugin.upb.h"
#include "upb/mini_descriptor/decode.h"
#include "upb/mini_table/field.h"
#include "upb/reflection/def.h"
// Must be last.
#include "upb/port/def.inc"
/******************************************************************************/
// Kitchen sink storage for all of our state as we build the mini descriptors.
typedef struct {
upb_Arena* arena;
upb_Status* status;
upb_DefPool* symtab;
upb_CodeGeneratorRequest* out;
jmp_buf jmp;
} upbc_State;
static void upbc_State_Fini(upbc_State* s) {
if (s->symtab) upb_DefPool_Free(s->symtab);
}
UPB_NORETURN static void upbc_Error(upbc_State* s, const char* fn,
const char* msg) {
upb_Status_SetErrorFormat(s->status, "%s(): %s", fn, msg);
upbc_State_Fini(s);
UPB_LONGJMP(s->jmp, -1);
}
static void upbc_State_Init(upbc_State* s) {
s->symtab = upb_DefPool_New();
if (!s->symtab) upbc_Error(s, __func__, "could not allocate def pool");
s->out = upb_CodeGeneratorRequest_new(s->arena);
if (!s->out) upbc_Error(s, __func__, "could not allocate request");
}
static upb_StringView upbc_State_StrDup(upbc_State* s, const char* str) {
upb_StringView from = upb_StringView_FromString(str);
char* to = upb_Arena_Malloc(s->arena, from.size);
if (!to) upbc_Error(s, __func__, "Out of memory");
memcpy(to, from.data, from.size);
return upb_StringView_FromDataAndSize(to, from.size);
}
static void upbc_State_AddMiniDescriptor(upbc_State* s, const char* name,
upb_StringView encoding) {
const upb_StringView key = upb_StringView_FromString(name);
upb_CodeGeneratorRequest_UpbInfo* info =
upb_CodeGeneratorRequest_UpbInfo_new(s->arena);
if (!info) upbc_Error(s, __func__, "Out of memory");
upb_CodeGeneratorRequest_UpbInfo_set_mini_descriptor(info, encoding);
bool ok = upb_CodeGeneratorRequest_upb_info_set(s->out, key, info, s->arena);
if (!ok) upbc_Error(s, __func__, "could not set mini descriptor in map");
}
/******************************************************************************/
// Forward declaration.
static void upbc_Scrape_Message(upbc_State*, const upb_MessageDef*);
static void upbc_Scrape_Enum(upbc_State* s, const upb_EnumDef* e) {
upb_StringView desc;
bool ok = upb_EnumDef_MiniDescriptorEncode(e, s->arena, &desc);
if (!ok) upbc_Error(s, __func__, "could not encode enum");
upbc_State_AddMiniDescriptor(s, upb_EnumDef_FullName(e), desc);
}
static void upbc_Scrape_Extension(upbc_State* s, const upb_FieldDef* f) {
upb_StringView desc;
bool ok = upb_FieldDef_MiniDescriptorEncode(f, s->arena, &desc);
if (!ok) upbc_Error(s, __func__, "could not encode extension");
upbc_State_AddMiniDescriptor(s, upb_FieldDef_FullName(f), desc);
}
static void upbc_Scrape_FileEnums(upbc_State* s, const upb_FileDef* f) {
const size_t len = upb_FileDef_TopLevelEnumCount(f);
for (size_t i = 0; i < len; i++) {
upbc_Scrape_Enum(s, upb_FileDef_TopLevelEnum(f, i));
}
}
static void upbc_Scrape_FileExtensions(upbc_State* s, const upb_FileDef* f) {
const size_t len = upb_FileDef_TopLevelExtensionCount(f);
for (size_t i = 0; i < len; i++) {
upbc_Scrape_Extension(s, upb_FileDef_TopLevelExtension(f, i));
}
}
static void upbc_Scrape_FileMessages(upbc_State* s, const upb_FileDef* f) {
const size_t len = upb_FileDef_TopLevelMessageCount(f);
for (size_t i = 0; i < len; i++) {
upbc_Scrape_Message(s, upb_FileDef_TopLevelMessage(f, i));
}
}
static void upbc_Scrape_File(upbc_State* s, const upb_FileDef* f) {
upbc_Scrape_FileEnums(s, f);
upbc_Scrape_FileExtensions(s, f);
upbc_Scrape_FileMessages(s, f);
}
static void upbc_Scrape_Files(upbc_State* s) {
const google_protobuf_compiler_CodeGeneratorRequest* request =
upb_CodeGeneratorRequest_request(s->out);
size_t len = 0;
const google_protobuf_FileDescriptorProto* const* files =
google_protobuf_compiler_CodeGeneratorRequest_proto_file(request, &len);
for (size_t i = 0; i < len; i++) {
const upb_FileDef* f = upb_DefPool_AddFile(s->symtab, files[i], s->status);
if (!f) upbc_Error(s, __func__, "could not add file to def pool");
upbc_Scrape_File(s, f);
}
}
static void upbc_Scrape_NestedEnums(upbc_State* s, const upb_MessageDef* m) {
const size_t len = upb_MessageDef_NestedEnumCount(m);
for (size_t i = 0; i < len; i++) {
upbc_Scrape_Enum(s, upb_MessageDef_NestedEnum(m, i));
}
}
static void upbc_Scrape_NestedExtensions(upbc_State* s,
const upb_MessageDef* m) {
const size_t len = upb_MessageDef_NestedExtensionCount(m);
for (size_t i = 0; i < len; i++) {
upbc_Scrape_Extension(s, upb_MessageDef_NestedExtension(m, i));
}
}
static void upbc_Scrape_NestedMessages(upbc_State* s, const upb_MessageDef* m) {
const size_t len = upb_MessageDef_NestedMessageCount(m);
for (size_t i = 0; i < len; i++) {
upbc_Scrape_Message(s, upb_MessageDef_NestedMessage(m, i));
}
}
static void upbc_Scrape_MessageSubs(upbc_State* s,
upb_CodeGeneratorRequest_UpbInfo* info,
const upb_MessageDef* m) {
const upb_MiniTableField** fields =
malloc(upb_MessageDef_FieldCount(m) * sizeof(*fields));
const upb_MiniTable* mt = upb_MessageDef_MiniTable(m);
uint32_t counts = upb_MiniTable_GetSubList(mt, fields);
uint32_t msg_count = counts >> 16;
uint32_t enum_count = counts & 0xffff;
for (uint32_t i = 0; i < msg_count; i++) {
const upb_FieldDef* f = upb_MessageDef_FindFieldByNumber(
m, upb_MiniTableField_Number(fields[i]));
if (!f) upbc_Error(s, __func__, "Missing f");
const upb_MessageDef* sub = upb_FieldDef_MessageSubDef(f);
if (!sub) upbc_Error(s, __func__, "Missing sub");
upb_StringView name = upbc_State_StrDup(s, upb_MessageDef_FullName(sub));
upb_CodeGeneratorRequest_UpbInfo_add_sub_message(info, name, s->arena);
}
for (uint32_t i = 0; i < enum_count; i++) {
const upb_FieldDef* f = upb_MessageDef_FindFieldByNumber(
m, upb_MiniTableField_Number(fields[msg_count + i]));
if (!f) upbc_Error(s, __func__, "Missing f (2)");
const upb_EnumDef* sub = upb_FieldDef_EnumSubDef(f);
if (!sub) upbc_Error(s, __func__, "Missing sub (2)");
upb_StringView name = upbc_State_StrDup(s, upb_EnumDef_FullName(sub));
upb_CodeGeneratorRequest_UpbInfo_add_sub_enum(info, name, s->arena);
}
free(fields);
}
static void upbc_Scrape_Message(upbc_State* s, const upb_MessageDef* m) {
upb_StringView desc;
bool ok = upb_MessageDef_MiniDescriptorEncode(m, s->arena, &desc);
if (!ok) upbc_Error(s, __func__, "could not encode message");
upb_CodeGeneratorRequest_UpbInfo* info =
upb_CodeGeneratorRequest_UpbInfo_new(s->arena);
if (!info) upbc_Error(s, __func__, "Out of memory");
upb_CodeGeneratorRequest_UpbInfo_set_mini_descriptor(info, desc);
upbc_Scrape_MessageSubs(s, info, m);
const upb_StringView key = upbc_State_StrDup(s, upb_MessageDef_FullName(m));
ok = upb_CodeGeneratorRequest_upb_info_set(s->out, key, info, s->arena);
if (!ok) upbc_Error(s, __func__, "could not set mini descriptor in map");
upbc_Scrape_NestedEnums(s, m);
upbc_Scrape_NestedExtensions(s, m);
upbc_Scrape_NestedMessages(s, m);
}
static upb_CodeGeneratorRequest* upbc_State_MakeCodeGeneratorRequest(
upbc_State* const s, google_protobuf_compiler_CodeGeneratorRequest* const request) {
if (UPB_SETJMP(s->jmp)) return NULL;
upbc_State_Init(s);
upb_CodeGeneratorRequest_set_request(s->out, request);
upbc_Scrape_Files(s);
upbc_State_Fini(s);
return s->out;
}
upb_CodeGeneratorRequest* upbc_MakeCodeGeneratorRequest(
google_protobuf_compiler_CodeGeneratorRequest* request, upb_Arena* arena,
upb_Status* status) {
upbc_State s = {
.arena = arena,
.status = status,
.symtab = NULL,
.out = NULL,
};
return upbc_State_MakeCodeGeneratorRequest(&s, request);
}