text: #include <stdio.h>
  #include <string.h>
  #include <stdlib.h>
  #include <pb_decode.h>
  #include "alltypes.pb.h"
  #include "test_helpers.h"
  #include "unittests.h"
  
  /* This function is called once from main(), it handles
     the decoding and checks the fields. */
  bool check_alltypes(pb_istream_t *stream, int mode)
  {
      int status = 0;
      AllTypes alltypes;
      
      /* Fill with garbage to better detect initialization errors */
      memset(&alltypes, 0xAA, sizeof(alltypes));
      alltypes.extensions = 0;
      
      if (!pb_decode(stream, AllTypes_fields, &alltypes))
          return false;
      
      TEST(alltypes.req_int32     && *alltypes.req_int32         == -1001);
      TEST(alltypes.req_int64     && *alltypes.req_int64         == -1002);
      TEST(alltypes.req_uint32    && *alltypes.req_uint32        == 1003);
      TEST(alltypes.req_uint64    && *alltypes.req_uint64        == 1004);
      TEST(alltypes.req_sint32    && *alltypes.req_sint32        == -1005);
      TEST(alltypes.req_sint64    && *alltypes.req_sint64        == -1006);
      TEST(alltypes.req_bool      && *alltypes.req_bool          == true);
      
      TEST(alltypes.req_fixed32   && *alltypes.req_fixed32       == 1008);
      TEST(alltypes.req_sfixed32  && *alltypes.req_sfixed32      == -1009);
      TEST(alltypes.req_float     && *alltypes.req_float         == 1010.0f);
      
      TEST(alltypes.req_fixed64   && *alltypes.req_fixed64       == 1011);
      TEST(alltypes.req_sfixed64  && *alltypes.req_sfixed64      == -1012);
      TEST(alltypes.req_double    && *alltypes.req_double        == 1013.0f);
      
      TEST(alltypes.req_string    && strcmp(alltypes.req_string, "1014") == 0);
      TEST(alltypes.req_bytes     && alltypes.req_bytes->size == 4);
      TEST(alltypes.req_bytes     && memcmp(&alltypes.req_bytes->bytes, "1015", 4) == 0);
      TEST(alltypes.req_submsg    && alltypes.req_submsg->substuff1
                                  && strcmp(alltypes.req_submsg->substuff1, "1016") == 0);
      TEST(alltypes.req_submsg    && alltypes.req_submsg->substuff2
                                  && *alltypes.req_submsg->substuff2 == 1016);
      TEST(alltypes.req_enum      && *alltypes.req_enum == MyEnum_Truth);
      TEST(alltypes.req_fbytes    && memcmp(alltypes.req_fbytes, "1019", 4) == 0);
  
      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 == NULL);
      
      TEST(alltypes.rep_enum_count == 5 && alltypes.rep_enum[4] == MyEnum_Truth && alltypes.rep_enum[0] == MyEnum_Zero);
      TEST(alltypes.rep_emptymsg_count == 5);
      TEST(alltypes.rep_fbytes_count == 5);
      TEST(alltypes.rep_fbytes[0][0] == 0 && alltypes.rep_fbytes[0][3] == 0);
      TEST(memcmp(alltypes.rep_fbytes[4], "2019", 4) == 0);
      TEST(alltypes.rep_farray && (*alltypes.rep_farray)[0] == 0 && (*alltypes.rep_farray)[4] == 2040);
      TEST(alltypes.rep_farray2 && (*alltypes.rep_farray2)[0] == 0 && (*alltypes.rep_farray2)[2] == 2095);
  
      if (mode == 0)
      {
          /* Expect that optional values are not present */
          TEST(alltypes.opt_int32         == NULL);
          TEST(alltypes.opt_int64         == NULL);
          TEST(alltypes.opt_uint32        == NULL);
          TEST(alltypes.opt_uint64        == NULL);
          TEST(alltypes.opt_sint32        == NULL);
          TEST(alltypes.opt_sint64        == NULL);
          TEST(alltypes.opt_bool          == NULL);
          
          TEST(alltypes.opt_fixed32       == NULL);
          TEST(alltypes.opt_sfixed32      == NULL);
          TEST(alltypes.opt_float         == NULL);
          TEST(alltypes.opt_fixed64       == NULL);
          TEST(alltypes.opt_sfixed64      == NULL);
          TEST(alltypes.opt_double        == NULL);
          
          TEST(alltypes.opt_string        == NULL);
          TEST(alltypes.opt_bytes         == NULL);
          TEST(alltypes.opt_submsg        == NULL);
          TEST(alltypes.opt_enum          == NULL);
          TEST(alltypes.opt_fbytes        == NULL);
  
          TEST(alltypes.which_oneof       == 0);
  
          TEST(alltypes.opt_non_zero_based_enum == NULL);
      }
      else
      {
          /* Expect filled-in values */
          TEST(alltypes.opt_int32 && *alltypes.opt_int32      == 3041);
          TEST(alltypes.opt_int64 && *alltypes.opt_int64      == 3042);
          TEST(alltypes.opt_uint32 && *alltypes.opt_uint32    == 3043);
          TEST(alltypes.opt_uint64 && *alltypes.opt_uint64    == 3044);
          TEST(alltypes.opt_sint32 && *alltypes.opt_sint32    == 3045);
          TEST(alltypes.opt_sint64 && *alltypes.opt_sint64    == 3046);
          TEST(alltypes.opt_bool && *alltypes.opt_bool        == true);
          
          TEST(alltypes.opt_fixed32 && *alltypes.opt_fixed32  == 3048);
          TEST(alltypes.opt_sfixed32 && *alltypes.opt_sfixed32== 3049);
          TEST(alltypes.opt_float && *alltypes.opt_float      == 3050.0f);
          TEST(alltypes.opt_fixed64 && *alltypes.opt_fixed64  == 3051);
          TEST(alltypes.opt_sfixed64 && *alltypes.opt_sfixed64== 3052);
          TEST(alltypes.opt_double && *alltypes.opt_double    == 3053.0);
          
          TEST(alltypes.opt_string && strcmp(alltypes.opt_string, "3054") == 0);
          TEST(alltypes.opt_bytes && alltypes.opt_bytes->size == 4);
          TEST(alltypes.opt_bytes && memcmp(&alltypes.opt_bytes->bytes, "3055", 4) == 0);
          TEST(alltypes.opt_submsg && strcmp(alltypes.opt_submsg->substuff1, "3056") == 0);
          TEST(alltypes.opt_submsg && *alltypes.opt_submsg->substuff2 == 3056);
          TEST(alltypes.opt_enum && *alltypes.opt_enum == MyEnum_Truth);
          TEST(alltypes.opt_emptymsg);
          TEST(alltypes.opt_fbytes && memcmp(alltypes.opt_fbytes, "3059", 4) == 0);
  
          TEST(alltypes.which_oneof == AllTypes_oneof_msg1_tag);
          TEST(alltypes.oneof.oneof_msg1 && strcmp(alltypes.oneof.oneof_msg1->substuff1, "4059") == 0);
          TEST(alltypes.oneof.oneof_msg1->substuff2 && *alltypes.oneof.oneof_msg1->substuff2 == 4059);
  
          TEST(alltypes.opt_non_zero_based_enum && *alltypes.opt_non_zero_based_enum == NonZeroBasedEnum_Three);
      }
      
      TEST(alltypes.req_limits->int32_min && *alltypes.req_limits->int32_min   == INT32_MIN);
      TEST(alltypes.req_limits->int32_max && *alltypes.req_limits->int32_max   == INT32_MAX);
      TEST(alltypes.req_limits->uint32_min && *alltypes.req_limits->uint32_min == 0);
      TEST(alltypes.req_limits->uint32_max && *alltypes.req_limits->uint32_max == UINT32_MAX);
      TEST(alltypes.req_limits->int64_min && *alltypes.req_limits->int64_min   == INT64_MIN);
      TEST(alltypes.req_limits->int64_max && *alltypes.req_limits->int64_max   == INT64_MAX);
      TEST(alltypes.req_limits->uint64_min && *alltypes.req_limits->uint64_min == 0);
      TEST(alltypes.req_limits->uint64_max && *alltypes.req_limits->uint64_max == UINT64_MAX);
      TEST(alltypes.req_limits->enum_min && *alltypes.req_limits->enum_min     == HugeEnum_Negative);
      TEST(alltypes.req_limits->enum_max && *alltypes.req_limits->enum_max     == HugeEnum_Positive);
      TEST(alltypes.req_limits->largetag && *alltypes.req_limits->largetag   == 1001);
  
      TEST(alltypes.req_ds8);
      TEST(alltypes.req_ds8->first && *alltypes.req_ds8->first == 9991);
      TEST(alltypes.req_ds8->first && *alltypes.req_ds8->second == 9992);
      
      TEST(alltypes.req_intsizes);
      TEST(*alltypes.req_intsizes->req_int8 == -128);
      TEST(*alltypes.req_intsizes->req_uint8 == 255);
      TEST(*alltypes.req_intsizes->req_sint8 == -128);
      TEST(*alltypes.req_intsizes->req_int16 == -32768);
      TEST(*alltypes.req_intsizes->req_uint16 == 65535);
      TEST(*alltypes.req_intsizes->req_sint16 == -32768);
  
      TEST(alltypes.end && *alltypes.end == 1099);
  
      pb_release(AllTypes_fields, &alltypes);
  
      return status == 0;
  }
  
  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 verify the message */
      if (!check_alltypes(&stream, mode))
      {
          fprintf(stderr, "Test failed: %s\n", PB_GET_ERROR(&stream));
          return 1;
      }
      else
      {
          return 0;
      }
  }
  