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/* GNU gettext - internationalization aids
Copyright (C) 1995, 1998, 2000-2004, 2006, 2009 Free Software Foundation, Inc.
This file was written by Peter Miller <millerp@canb.auug.org.au>
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
/* Specification. */
#include "str-list.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "xalloc.h"
/* Initialize an empty list of strings. */
void
string_list_init (string_list_ty *slp)
{
slp->item = NULL;
slp->nitems = 0;
slp->nitems_max = 0;
}
/* Return a fresh, empty list of strings. */
string_list_ty *
string_list_alloc ()
{
string_list_ty *slp;
slp = XMALLOC (string_list_ty);
slp->item = NULL;
slp->nitems = 0;
slp->nitems_max = 0;
return slp;
}
/* Append a single string to the end of a list of strings. */
void
string_list_append (string_list_ty *slp, const char *s)
{
/* Grow the list. */
if (slp->nitems >= slp->nitems_max)
{
size_t nbytes;
slp->nitems_max = slp->nitems_max * 2 + 4;
nbytes = slp->nitems_max * sizeof (slp->item[0]);
slp->item = (const char **) xrealloc (slp->item, nbytes);
}
/* Add a copy of the string to the end of the list. */
slp->item[slp->nitems++] = xstrdup (s);
}
/* Append a single string to the end of a list of strings, unless it is
already contained in the list. */
void
string_list_append_unique (string_list_ty *slp, const char *s)
{
size_t j;
/* Do not if the string is already in the list. */
for (j = 0; j < slp->nitems; ++j)
if (strcmp (slp->item[j], s) == 0)
return;
/* Grow the list. */
if (slp->nitems >= slp->nitems_max)
{
slp->nitems_max = slp->nitems_max * 2 + 4;
slp->item = (const char **) xrealloc (slp->item,
slp->nitems_max
* sizeof (slp->item[0]));
}
/* Add a copy of the string to the end of the list. */
slp->item[slp->nitems++] = xstrdup (s);
}
/* Destroy a list of strings. */
void
string_list_destroy (string_list_ty *slp)
{
size_t j;
for (j = 0; j < slp->nitems; ++j)
free ((char *) slp->item[j]);
if (slp->item != NULL)
free (slp->item);
}
/* Free a list of strings. */
void
string_list_free (string_list_ty *slp)
{
size_t j;
for (j = 0; j < slp->nitems; ++j)
free ((char *) slp->item[j]);
if (slp->item != NULL)
free (slp->item);
free (slp);
}
/* Return a freshly allocated string obtained by concatenating all the
strings in the list. */
char *
string_list_concat (const string_list_ty *slp)
{
size_t len;
size_t j;
char *result;
size_t pos;
len = 1;
for (j = 0; j < slp->nitems; ++j)
len += strlen (slp->item[j]);
result = XNMALLOC (len, char);
pos = 0;
for (j = 0; j < slp->nitems; ++j)
{
len = strlen (slp->item[j]);
memcpy (result + pos, slp->item[j], len);
pos += len;
}
result[pos] = '\0';
return result;
}
/* Return a freshly allocated string obtained by concatenating all the
strings in the list, and destroy the list. */
char *
string_list_concat_destroy (string_list_ty *slp)
{
char *result;
/* Optimize the most frequent case. */
if (slp->nitems == 1)
{
result = (char *) slp->item[0];
free (slp->item);
}
else
{
result = string_list_concat (slp);
string_list_destroy (slp);
}
return result;
}
/* Return a freshly allocated string obtained by concatenating all the
strings in the list, separated by the separator string, terminated
by the terminator character. The terminator character is not added if
drop_redundant_terminator is true and the last string already ends with
the terminator. */
char *
string_list_join (const string_list_ty *slp, const char *separator,
char terminator, bool drop_redundant_terminator)
{
size_t separator_len = strlen (separator);
size_t len;
size_t j;
char *result;
size_t pos;
len = 1;
for (j = 0; j < slp->nitems; ++j)
{
if (j > 0)
len += separator_len;
len += strlen (slp->item[j]);
}
if (terminator)
++len;
result = XNMALLOC (len, char);
pos = 0;
for (j = 0; j < slp->nitems; ++j)
{
if (j > 0)
{
memcpy (result + pos, separator, separator_len);
pos += separator_len;
}
len = strlen (slp->item[j]);
memcpy (result + pos, slp->item[j], len);
pos += len;
}
if (terminator
&& !(drop_redundant_terminator
&& slp->nitems > 0
&& (len = strlen (slp->item[slp->nitems - 1])) > 0
&& slp->item[slp->nitems - 1][len - 1] == terminator))
result[pos++] = terminator;
result[pos] = '\0';
return result;
}
/* Return 1 if s is contained in the list of strings, 0 otherwise. */
bool
string_list_member (const string_list_ty *slp, const char *s)
{
size_t j;
for (j = 0; j < slp->nitems; ++j)
if (strcmp (slp->item[j], s) == 0)
return true;
return false;
}
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