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The C based gRPC (C++, Python, Ruby, Objective-C, PHP, C#) https://grpc.io/
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grpc/third_party/nanopb/tests/backwards_compatibility/decode_legacy.c

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/* Tests the decoding of all types.
* This is a backwards-compatibility test, using alltypes_legacy.h.
* It is similar to decode_alltypes, but duplicated in order to allow
* decode_alltypes to test any new features introduced later.
*
* Run e.g. ./encode_legacy | ./decode_legacy
*/
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <pb_decode.h>
#include "alltypes_legacy.h"
#include "test_helpers.h"
#define TEST(x) if (!(x)) { \
printf("Test " #x " failed.\n"); \
return false; \
}
/* This function is called once from main(), it handles
the decoding and checks the fields. */
bool check_alltypes(pb_istream_t *stream, int mode)
{
AllTypes alltypes = {0};
if (!pb_decode(stream, AllTypes_fields, &alltypes))
return false;
TEST(alltypes.req_int32 == -1001);
TEST(alltypes.req_int64 == -1002);
TEST(alltypes.req_uint32 == 1003);
TEST(alltypes.req_uint64 == 1004);
TEST(alltypes.req_sint32 == -1005);
TEST(alltypes.req_sint64 == -1006);
TEST(alltypes.req_bool == true);
TEST(alltypes.req_fixed32 == 1008);
TEST(alltypes.req_sfixed32 == -1009);
TEST(alltypes.req_float == 1010.0f);
TEST(alltypes.req_fixed64 == 1011);
TEST(alltypes.req_sfixed64 == -1012);
TEST(alltypes.req_double == 1013.0f);
TEST(strcmp(alltypes.req_string, "1014") == 0);
TEST(alltypes.req_bytes.size == 4);
TEST(memcmp(alltypes.req_bytes.bytes, "1015", 4) == 0);
TEST(strcmp(alltypes.req_submsg.substuff1, "1016") == 0);
TEST(alltypes.req_submsg.substuff2 == 1016);
TEST(alltypes.req_submsg.substuff3 == 3);
TEST(alltypes.req_enum == MyEnum_Truth);
TEST(alltypes.rep_int32_count == 5 && alltypes.rep_int32[4] == -2001 && alltypes.rep_int32[0] == 0);
TEST(alltypes.rep_int64_count == 5 && alltypes.rep_int64[4] == -2002 && alltypes.rep_int64[0] == 0);
TEST(alltypes.rep_uint32_count == 5 && alltypes.rep_uint32[4] == 2003 && alltypes.rep_uint32[0] == 0);
TEST(alltypes.rep_uint64_count == 5 && alltypes.rep_uint64[4] == 2004 && alltypes.rep_uint64[0] == 0);
TEST(alltypes.rep_sint32_count == 5 && alltypes.rep_sint32[4] == -2005 && alltypes.rep_sint32[0] == 0);
TEST(alltypes.rep_sint64_count == 5 && alltypes.rep_sint64[4] == -2006 && alltypes.rep_sint64[0] == 0);
TEST(alltypes.rep_bool_count == 5 && alltypes.rep_bool[4] == true && alltypes.rep_bool[0] == false);
TEST(alltypes.rep_fixed32_count == 5 && alltypes.rep_fixed32[4] == 2008 && alltypes.rep_fixed32[0] == 0);
TEST(alltypes.rep_sfixed32_count == 5 && alltypes.rep_sfixed32[4] == -2009 && alltypes.rep_sfixed32[0] == 0);
TEST(alltypes.rep_float_count == 5 && alltypes.rep_float[4] == 2010.0f && alltypes.rep_float[0] == 0.0f);
TEST(alltypes.rep_fixed64_count == 5 && alltypes.rep_fixed64[4] == 2011 && alltypes.rep_fixed64[0] == 0);
TEST(alltypes.rep_sfixed64_count == 5 && alltypes.rep_sfixed64[4] == -2012 && alltypes.rep_sfixed64[0] == 0);
TEST(alltypes.rep_double_count == 5 && alltypes.rep_double[4] == 2013.0 && alltypes.rep_double[0] == 0.0);
TEST(alltypes.rep_string_count == 5 && strcmp(alltypes.rep_string[4], "2014") == 0 && alltypes.rep_string[0][0] == '\0');
TEST(alltypes.rep_bytes_count == 5 && alltypes.rep_bytes[4].size == 4 && alltypes.rep_bytes[0].size == 0);
TEST(memcmp(alltypes.rep_bytes[4].bytes, "2015", 4) == 0);
TEST(alltypes.rep_submsg_count == 5);
TEST(strcmp(alltypes.rep_submsg[4].substuff1, "2016") == 0 && alltypes.rep_submsg[0].substuff1[0] == '\0');
TEST(alltypes.rep_submsg[4].substuff2 == 2016 && alltypes.rep_submsg[0].substuff2 == 0);
TEST(alltypes.rep_submsg[4].substuff3 == 2016 && alltypes.rep_submsg[0].substuff3 == 3);
TEST(alltypes.rep_enum_count == 5 && alltypes.rep_enum[4] == MyEnum_Truth && alltypes.rep_enum[0] == MyEnum_Zero);
if (mode == 0)
{
/* Expect default values */
TEST(alltypes.has_opt_int32 == false);
TEST(alltypes.opt_int32 == 4041);
TEST(alltypes.has_opt_int64 == false);
TEST(alltypes.opt_int64 == 4042);
TEST(alltypes.has_opt_uint32 == false);
TEST(alltypes.opt_uint32 == 4043);
TEST(alltypes.has_opt_uint64 == false);
TEST(alltypes.opt_uint64 == 4044);
TEST(alltypes.has_opt_sint32 == false);
TEST(alltypes.opt_sint32 == 4045);
TEST(alltypes.has_opt_sint64 == false);
TEST(alltypes.opt_sint64 == 4046);
TEST(alltypes.has_opt_bool == false);
TEST(alltypes.opt_bool == false);
TEST(alltypes.has_opt_fixed32 == false);
TEST(alltypes.opt_fixed32 == 4048);
TEST(alltypes.has_opt_sfixed32 == false);
TEST(alltypes.opt_sfixed32 == 4049);
TEST(alltypes.has_opt_float == false);
TEST(alltypes.opt_float == 4050.0f);
TEST(alltypes.has_opt_fixed64 == false);
TEST(alltypes.opt_fixed64 == 4051);
TEST(alltypes.has_opt_sfixed64 == false);
TEST(alltypes.opt_sfixed64 == 4052);
TEST(alltypes.has_opt_double == false);
TEST(alltypes.opt_double == 4053.0);
TEST(alltypes.has_opt_string == false);
TEST(strcmp(alltypes.opt_string, "4054") == 0);
TEST(alltypes.has_opt_bytes == false);
TEST(alltypes.opt_bytes.size == 4);
TEST(memcmp(alltypes.opt_bytes.bytes, "4055", 4) == 0);
TEST(alltypes.has_opt_submsg == false);
TEST(strcmp(alltypes.opt_submsg.substuff1, "1") == 0);
TEST(alltypes.opt_submsg.substuff2 == 2);
TEST(alltypes.opt_submsg.substuff3 == 3);
TEST(alltypes.has_opt_enum == false);
TEST(alltypes.opt_enum == MyEnum_Second);
}
else
{
/* Expect filled-in values */
TEST(alltypes.has_opt_int32 == true);
TEST(alltypes.opt_int32 == 3041);
TEST(alltypes.has_opt_int64 == true);
TEST(alltypes.opt_int64 == 3042);
TEST(alltypes.has_opt_uint32 == true);
TEST(alltypes.opt_uint32 == 3043);
TEST(alltypes.has_opt_uint64 == true);
TEST(alltypes.opt_uint64 == 3044);
TEST(alltypes.has_opt_sint32 == true);
TEST(alltypes.opt_sint32 == 3045);
TEST(alltypes.has_opt_sint64 == true);
TEST(alltypes.opt_sint64 == 3046);
TEST(alltypes.has_opt_bool == true);
TEST(alltypes.opt_bool == true);
TEST(alltypes.has_opt_fixed32 == true);
TEST(alltypes.opt_fixed32 == 3048);
TEST(alltypes.has_opt_sfixed32 == true);
TEST(alltypes.opt_sfixed32 == 3049);
TEST(alltypes.has_opt_float == true);
TEST(alltypes.opt_float == 3050.0f);
TEST(alltypes.has_opt_fixed64 == true);
TEST(alltypes.opt_fixed64 == 3051);
TEST(alltypes.has_opt_sfixed64 == true);
TEST(alltypes.opt_sfixed64 == 3052);
TEST(alltypes.has_opt_double == true);
TEST(alltypes.opt_double == 3053.0);
TEST(alltypes.has_opt_string == true);
TEST(strcmp(alltypes.opt_string, "3054") == 0);
TEST(alltypes.has_opt_bytes == true);
TEST(alltypes.opt_bytes.size == 4);
TEST(memcmp(alltypes.opt_bytes.bytes, "3055", 4) == 0);
TEST(alltypes.has_opt_submsg == true);
TEST(strcmp(alltypes.opt_submsg.substuff1, "3056") == 0);
TEST(alltypes.opt_submsg.substuff2 == 3056);
TEST(alltypes.opt_submsg.substuff3 == 3);
TEST(alltypes.has_opt_enum == true);
TEST(alltypes.opt_enum == MyEnum_Truth);
}
TEST(alltypes.end == 1099);
return true;
}
int main(int argc, char **argv)
{
uint8_t buffer[1024];
size_t count;
pb_istream_t stream;
/* Whether to expect the optional values or the default values. */
int mode = (argc > 1) ? atoi(argv[1]) : 0;
/* Read the data into buffer */
SET_BINARY_MODE(stdin);
count = fread(buffer, 1, sizeof(buffer), stdin);
/* Construct a pb_istream_t for reading from the buffer */
stream = pb_istream_from_buffer(buffer, count);
/* Decode and print out the stuff */
if (!check_alltypes(&stream, mode))
{
printf("Parsing failed: %s\n", PB_GET_ERROR(&stream));
return 1;
} else {
return 0;
}
}