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/*
* Copyright (C) 2023 Patrick McDermott
*
* This file is part of opkg-opk.
*
* opkg-opk 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.
*
* opkg-opk 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 opkg-opk. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stdlib.h>
#include <string.h>
#include "defs.h"
#include "dirent.h"
static int
_opkg_opk_dirent_name_prefix(struct opkg_opk_dirent *dirent, char **name_buf,
size_t *name_buf_len, char **pref_buf, size_t *pref_buf_len,
size_t *name_len, size_t *pref_len)
{
size_t len;
char **buf;
len = strlen(dirent->name) + 1;
if (*name_len + len <= *name_buf_len) {
*name_buf_len -= len;
buf = name_buf;
} else if (*pref_len + len <= *pref_buf_len) {
*pref_buf_len -= len;
buf = pref_buf;
} else {
return OPKG_OPK_ERROR;
}
if (dirent->parent != NULL &&
_opkg_opk_dirent_name_prefix(dirent->parent,
name_buf, name_buf_len, pref_buf, pref_buf_len,
name_len, pref_len) == OPKG_OPK_ERROR) {
return OPKG_OPK_ERROR;
}
**buf = '/';
*buf += 1;
memcpy(*buf, dirent->name, len - 1);
*buf += len - 1;
return OPKG_OPK_OK;
}
int
opkg_opk_dirent_name_prefix(struct opkg_opk_dirent *dirent, char *name_buf,
size_t name_buf_len, char *pref_buf, size_t pref_buf_len)
{
size_t name_len = 0;
size_t pref_len = 0;
if (_opkg_opk_dirent_name_prefix(dirent, &name_buf, &name_buf_len,
&pref_buf, &pref_buf_len, &name_len, &pref_len)
== OPKG_OPK_ERROR) {
return OPKG_OPK_ERROR;
}
name_buf[name_len] = '\0';
pref_buf[pref_len] = '\0';
return OPKG_OPK_OK;
}
static char *
_opkg_opk_dirent_full_name(struct opkg_opk_dirent *dirent, char **cur,
size_t *buf_len)
{
size_t len;
char *buf;
len = strlen(dirent->name) + 1;
*buf_len += len;
if (dirent->parent == NULL) {
buf = malloc(*buf_len);
if (buf == NULL) {
return NULL;
}
*cur = buf;
} else if ((buf = _opkg_opk_dirent_full_name(dirent->parent, cur,
buf_len)) == NULL) {
return NULL;
}
**cur = '/';
*cur += 1;
memcpy(*cur, dirent->name, len - 1);
*cur += len - 1;
return buf;
}
char *
opkg_opk_dirent_full_name(struct opkg_opk_dirent *dirent)
{
char *name;
char *cur = NULL;
size_t buf_len = 1; /* 1 for NUL */
if ((name = _opkg_opk_dirent_full_name(dirent, &cur, &buf_len)) == NULL)
{
return NULL;
}
*cur = '\0';
return name;
}
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