src/cbuf/set_data.c

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#include <sys/types.h>
#include <string.h>
#include <errno.h>

#include "cbuf.h"

char *
cbufSetData(Cbuf this, const void * src, size_t n)
{
        char * addr;

        if (n > cbufGetFree(this)) {
                errno = ECBUFOVFL;
                return (char *)-1;
        }

        addr = memcpy(cbufGetWrite(this), src, n);
        cbufIncWrite(this, n);

        return addr;
}

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