daemon: Implement a growable strings buffer type.

Previously a lot of daemon code used three variables (a string list,
'int size' and 'int alloc') to track growable strings buffers.  This
commit implements a simple struct containing the same variables, but
using size_t instead of int:

  struct stringsbuf {
    char **argv;
    size_t size;
    size_t alloc;
  };

Use it like this:

  DECLARE_STRINGSBUF (ret);
//...
  if (add_string (&ret, str) == -1)
    return NULL;
//...
  if (end_stringsbuf (&ret) == -1)
    return NULL;
  return ret.argv;

0 files changed, 0 insertions, 0 deletions