Protocol Buffers - Google's data interchange format (grpc依赖) https://developers.google.com/protocol-buffers/
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/*
* Copyright (c) 2009-2022, Google LLC
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of Google LLC nor the
* names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL Google LLC BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "upbc/code_generator_request.h"
#include <inttypes.h>
#include "google/protobuf/compiler/plugin.upb.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;
upbc_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 = upbc_CodeGeneratorRequest_new(s->arena);
if (!s->out) upbc_Error(s, __func__, "could not allocate request");
}
static void upbc_State_Emit(upbc_State* s, const char* name,
upb_StringView encoding) {
const upb_StringView key = upb_StringView_FromString(name);
bool ok = upbc_CodeGeneratorRequest_mini_descriptors_set(s->out, key,
encoding, 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_Emit(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_Emit(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 =
upbc_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_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");
upbc_State_Emit(s, upb_MessageDef_FullName(m), desc);
upbc_Scrape_NestedEnums(s, m);
upbc_Scrape_NestedExtensions(s, m);
upbc_Scrape_NestedMessages(s, m);
}
static upbc_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);
upbc_CodeGeneratorRequest_set_request(s->out, request);
upbc_Scrape_Files(s);
upbc_State_Fini(s);
return s->out;
}
upbc_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);
}