/* ----------------------------------------------------------------------------

   libconfig - A library for processing structured configuration files

   Copyright (C) 2005-2025  Mark A Lindner

   This file is part of libconfig.

   This library is free software; you can redistribute it and/or

   modify it under the terms of the GNU Lesser General Public License

   as published by the Free Software Foundation; either version 2.1 of

   the License, or (at your option) any later version.

   This library is distributed in the hope that it will be useful, but

   WITHOUT ANY WARRANTY; without even the implied warranty of

   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

   Lesser General Public License for more details.

   You should have received a copy of the GNU Library General Public

   License along with this library; if not, see

   <http://www.gnu.org/licenses/>.

   ----------------------------------------------------------------------------

*/

#include "strbuf.h"

#include "util.h"

#include <string.h>

#include <stdlib.h>

#define STRING_BLOCK_SIZE 64

/* ------------------------------------------------------------------------- */

void libconfig_strbuf_ensure_capacity(strbuf_t *buf, size_t len)

{

  static const size_t mask = ~(STRING_BLOCK_SIZE - 1);

  size_t newlen = buf->length + len + 1; /* add 1 for NUL */

  if(newlen > buf->capacity)

  {

    buf->capacity = (newlen + (STRING_BLOCK_SIZE - 1)) & mask;

    buf->string = (char *)libconfig_realloc(buf->string, buf->capacity);

  }

}

/* ------------------------------------------------------------------------- */

char *libconfig_strbuf_release(strbuf_t *buf)

{

  char *r = buf->string;

  __zero(buf);

  return(r);

}

/* ------------------------------------------------------------------------- */

void libconfig_strbuf_append_string(strbuf_t *buf, const char *s)

{

  size_t len = strlen(s);

  libconfig_strbuf_ensure_capacity(buf, len);

  strcpy(buf->string + buf->length, s);

  buf->length += len;

}

/* ------------------------------------------------------------------------- */

void libconfig_strbuf_append_char(strbuf_t *buf, char c)

{

  libconfig_strbuf_ensure_capacity(buf, 1);

  *(buf->string + buf->length) = c;

  ++(buf->length);

  *(buf->string + buf->length) = '\0';

}

/* ------------------------------------------------------------------------- */