filehash.c


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#include "filehash.h"

#include <stdlib.h>
#include <string.h>

struct filehash_t
{
  const char *hash_program;
  const char **argv;
  unsigned max_per_invocation;
};

filehash_t *
filehash_new(const char *hash_program, unsigned max_per_invocation)
{
  filehash_t *fh;

  fh = malloc(sizeof(filehash_t));
  if (!fh)
    return NULL;

  *fh = (filehash_t){
    .hash_program = strdup(hash_program),
    .max_per_invocation = max_per_invocation,
    .argv = reallocarray(NULL, 1 + max_per_invocation, sizeof(const char *)),
  };

  if (!fh->hash_program)
    goto fail;
  if (!fh->argv)
    goto fail;

  fh->argv[max_per_invocation] = NULL;

  return fh;

fail:
  filehash_free(fh);
  return NULL;
}

void
filehash_free(filehash_t *fh)
{
  if (!fh)
    return;

  free(fh->argv);
  free((void *)fh->hash_program);
  free(fh);
}