static bool initialize()
{
// Initialize upb state, decode descriptor.
upb_status status = UPB_STATUS_INIT;
upb_symtab *s = upb_symtab_new();
upb_load_descriptor_file_into_symtab(s, MESSAGE_DESCRIPTOR_FILE, &status);
if(!upb_ok(&status)) {
fprintf(stderr, "Error reading descriptor: %s\n",
upb_status_getstr(&status));
return false;
}
def = upb_dyncast_msgdef_const(upb_symtab_lookup(s, MESSAGE_NAME));
if(!def) {
fprintf(stderr, "Error finding symbol '%s'.\n", MESSAGE_NAME);
return false;
}
upb_symtab_unref(s);
// Read the message data itself.
char *str = upb_readfile(MESSAGE_FILE, &len);
if(str == NULL) {
fprintf(stderr, "Error reading " MESSAGE_FILE "\n");
return false;
}
upb_status_uninit(&status);
for (int i = 0; i < NUM_MESSAGES; i++)
msg[i] = upb_stdmsg_new(def);
upb_stringsrc_init(&strsrc);
upb_stringsrc_reset(&strsrc, str, len);
upb_handlers *h = upb_handlers_new();
upb_accessors_reghandlers(h, def);
if (!JIT) h->should_jit = false;
upb_decoder_init(&d, h);
upb_handlers_unref(h);
if (!BYREF) {
// TODO: use byref/byval accessors.
}
return true;
}
static bool initialize()
{
// Initialize upb state, decode descriptor.
upb_status status = UPB_STATUS_INIT;
upb_symtab *s = upb_symtab_new(&s);
upb_load_descriptor_file_into_symtab(s, MESSAGE_DESCRIPTOR_FILE, &status);
if(!upb_ok(&status)) {
fprintf(stderr, "Error reading descriptor: %s\n",
upb_status_getstr(&status));
return false;
}
def = upb_dyncast_msgdef_const(upb_symtab_lookup(s, MESSAGE_NAME, &def));
if(!def) {
fprintf(stderr, "Error finding symbol '%s'.\n", MESSAGE_NAME);
return false;
}
upb_symtab_unref(s, &s);
// Read the message data itself.
input_str = upb_readfile(MESSAGE_FILE, &input_len);
if(input_str == NULL) {
fprintf(stderr, "Error reading " MESSAGE_FILE "\n");
return false;
}
upb_handlers *handlers = upb_handlers_new();
// Cause all messages to be read, but do nothing when they are.
upb_handlerset hset = {NULL, NULL, value, startsubmsg, NULL, NULL, NULL};
upb_handlers_reghandlerset(handlers, def, &hset);
upb_decoder_init(&decoder);
plan = upb_decoderplan_new(handlers, JIT);
upb_decoder_resetplan(&decoder, plan, 0);
upb_handlers_unref(handlers);
upb_stringsrc_init(&stringsrc);
return true;
}
int main(int argc, char *argv[]) {
if (argc < 3) {
fprintf(stderr, "Usage: stream_transcode <descfile> <msgname>\n");
return 1;
}
upb_symtab *symtab = upb_symtab_new();
size_t desc_len;
const char *desc = upb_readfile(argv[1], &desc_len);
if (!desc) {
fprintf(stderr, "Couldn't open descriptor file: %s\n", argv[1]);
return 1;
}
upb_status status = UPB_STATUS_INIT;
upb_load_descriptor_into_symtab(symtab, desc, desc_len, &status);
if (!upb_ok(&status)) {
fprintf(stderr, "Error parsing descriptor: %s", upb_status_getstr(&status));
return 1;
}
free((void*)desc);
const upb_def *md = upb_symtab_lookup(symtab, argv[2]);
if (!md) {
fprintf(stderr, "Descriptor did not contain message: %s\n", argv[2]);
return 1;
}
const upb_msgdef *m = upb_dyncast_msgdef_const(md);
if (!m) {
fprintf(stderr, "Def was not a msgdef.\n");
return 1;
}
upb_stdio in, out;
upb_stdio_init(&in);
upb_stdio_init(&out);
upb_stdio_reset(&in, stdin);
upb_stdio_reset(&out, stdout);
upb_handlers *handlers = upb_handlers_new();
upb_textprinter *p = upb_textprinter_new();
upb_textprinter_reset(p, upb_stdio_bytesink(&out), false);
upb_textprinter_reghandlers(handlers, m);
upb_decoder d;
upb_decoder_init(&d, handlers);
upb_decoder_reset(&d, upb_stdio_bytesrc(&in), 0, UPB_NONDELIMITED, p);
upb_status_clear(&status);
upb_decoder_decode(&d, &status);
if (!upb_ok(&status)) {
fprintf(stderr, "Error parsing input: %s", upb_status_getstr(&status));
}
upb_status_uninit(&status);
upb_stdio_uninit(&in);
upb_stdio_uninit(&out);
upb_decoder_uninit(&d);
upb_textprinter_free(p);
upb_def_unref(UPB_UPCAST(m));
upb_symtab_unref(symtab);
// Prevent C library from holding buffers open, so Valgrind doesn't see
// memory leaks.
fclose(stdin);
fclose(stdout);
}