Invalid Initializer - Array of structs

Question

I am having problems with assigning a value to cv. Based on my code below, I am getting error: invalid initializer at the line:

ChVec cv = r->cv;

Would anyone know what the issue might be?

Thanks for your help.

tuple.c

#include "defs.h"
#include "tuple.h"
#include "reln.h"
#include "hash.h"
#include "chvec.h"
#include "bits.h"

Bits tupleHash(Reln r, Tuple t)
{
    ChVec cv = r->cv;
    ...
    ...
}

chvec.h

#include "defs.h"
#include "reln.h"

#define MAXCHVEC 32

typedef struct {
    Byte att;
    Byte bit;
} ChVecItem;

typedef ChVecItem ChVec[MAXCHVEC];

reln.h

#ifndef RELN_H
#define RELN_H 1

typedef struct RelnRep *Reln;

#include "defs.h"
#include "tuple.h"
#include "chvec.h"
#include "page.h"


struct RelnRep {
    Count  nattrs; // number of attributes
    Count  depth;  // depth of main data file
    Offset sp;     // split pointer
    Count  npages; // number of main data pages
    Count  ntups;  // total number of tuples
    ChVec  cv;     // choice vector
    char   mode;   // open for read/write
    FILE  *info;   // handle on info file
    FILE  *data;   // handle on data file
    FILE  *ovflow; // handle on ovflow file
};

- The link will be of help to you. stackoverflow.com/questions/3635053/… — techEmbedded
– techEmbedded, Commented May 6, 2016 at 6:20

Some programmer dude · Accepted Answer · 2016-05-06 05:42:16Z

3

The type ChVec is an array, you can't initialize an array using another array (just like you can't assign to an array variable).

Instead you need to copy the array:

ChVec cv;
memcpy(cv, r->cv, sizeof cv);

answered May 6, 2016 at 5:42

Some programmer dude

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Comments

CinCout · Accepted Answer · 2016-05-06 05:42:47Z

2

Arrays cannot be assigned the way you are doing.

You must use memcpy() to copy contents:

ChVec cv;
memcpy(cv, r->cv, sizeof(cv));

answered May 6, 2016 at 5:42

CinCout

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