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Imported needed files for exclude path functionality

This commit is contained in:
Mario Danic 2006-09-01 12:12:25 +00:00
parent 11d1b9bbb6
commit 374166119e
4 changed files with 350 additions and 0 deletions
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65
libisofs/exclude.c Normal file
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/***************************************************************************
* exclude.c
*
* Copyright 2006 Philippe Rouquier
* Bonfire-app@wanadoo.fr
***************************************************************************/
/*
* 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 2 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 Library General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include "hash.h"
#include "exclude.h"
static struct iso_hash_node *table[HASH_NODES]={0,};
static int num=0;
void
iso_exclude_add_path(const char *path)
{
if (!path)
return;
num += iso_hash_insert(table, path);
}
void
iso_exclude_remove_path(const char *path)
{
if (!num || !path)
return;
num -= iso_hash_remove(table, path);
}
void
iso_exclude_empty(void)
{
if (!num)
return;
iso_hash_empty(table);
num=0;
}
int
iso_exclude_lookup(const char *path)
{
if (!num || !path)
return 0;
return iso_hash_lookup(table, path);
}

35
libisofs/exclude.h Normal file
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/***************************************************************************
* exclude.h
*
* Copyright 2006 Philippe Rouquier
* Bonfire-app@wanadoo.fr
***************************************************************************/
/*
* 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 2 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 Library General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#ifndef ISO_EXCLUDE_H
#define ISO_EXCLUDE_H
/**
* Add a path to ignore when adding a directory recursively.
*
* \param path The path, on the local filesystem, of the file.
*/
int
iso_exclude_lookup(const char *path);
#endif /* ISO_EXCLUDE */

181
libisofs/hash.c Normal file
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/***************************************************************************
* hash.c
*
* Copyright 2006 Philippe Rouquier
* Bonfire-app@wanadoo.fr
***************************************************************************/
/*
* 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 2 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 Library General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include <stdlib.h>
#include <string.h>
#include "hash.h"
static unsigned int
iso_hash_path(const char *path)
{
unsigned int hash_num=0;
const char *c;
c=path;
while(*c)
hash_num = (hash_num << 15) + (hash_num << 3) + (hash_num >> 3) + *c++;
return hash_num % HASH_NODES;
}
int
iso_hash_lookup(struct iso_hash_node **table, const char *path)
{
struct iso_hash_node *node;
unsigned int hash_num;
hash_num = iso_hash_path(path);
node=table[hash_num];
if (!node)
return 0;
if (!strcmp(path, node->path))
return 1;
while (node->next) {
node=node->next;
if (!strcmp(path, node->path))
return 1;
}
return 0;
}
static struct iso_hash_node*
iso_hash_node_new (const char *path)
{
struct iso_hash_node *node;
/*create an element to be inserted in the hash table */
node=malloc(sizeof(struct iso_hash_node));
node->path=strdup(path);
node->next=NULL;
return node;
}
int
iso_hash_insert(struct iso_hash_node **table, const char *path)
{
struct iso_hash_node *node;
unsigned int hash_num;
/* find the hash number */
hash_num = iso_hash_path(path);
/* insert it */
node = table[hash_num];
/* unfortunately, we can't safely consider that a path
* won't be twice in the hash table so make sure it
* doesn't already exists */
if (!node) {
table[hash_num]=iso_hash_node_new(path);
return 1;
}
/* if it's already in, we don't do anything */
if (!strcmp(path, node->path))
return 0;
while (node->next) {
node = node->next;
/* if it's already in, we don't do anything */
if (!strcmp (path, node->path))
return 0;
}
node->next = iso_hash_node_new(path);
return 1;
}
static void
iso_hash_node_free(struct iso_hash_node *node)
{
free(node->path);
free(node);
}
int
iso_hash_remove(struct iso_hash_node **table, const char *path)
{
unsigned int hash_num;
struct iso_hash_node *node;
hash_num = iso_hash_path(path);
node=table[hash_num];
if (!node)
return 0;
if (!strcmp(path, node->path)) {
table[hash_num]=node->next;
iso_hash_node_free(node);
return 1;
}
while (node->next) {
struct iso_hash_node *prev;
prev = node;
node = node->next;
if (!strcmp (path, node->path)) {
prev->next=node->next;
iso_hash_node_free(node);
return 1;
}
}
return 0;
}
void
iso_hash_empty(struct iso_hash_node **table)
{
int i;
for (i=0; i < HASH_NODES; i++) {
struct iso_hash_node *node;
node=table[i];
if (!node)
continue;
table[i]=NULL;
do {
struct iso_hash_node *next;
next=node->next;
iso_hash_node_free(node);
node=next;
} while (node);
}
}

69
libisofs/hash.h Normal file
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/***************************************************************************
* hash.h
*
* Copyright 2006 Philippe Rouquier
* Bonfire-app@wanadoo.fr
***************************************************************************/
/*
* 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 2 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 Library General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#ifndef ISO_HASH_H
#define ISO_HASH_H
struct iso_hash_node {
struct iso_hash_node *next;
char *path;
};
#define HASH_NODES 128
/**
* Searches in the hash table if the path exists.
*
* \param table The hash table.
* \param path The path of the file to look for.
*
* \return 1 if the path exists in the hash table, 0 otherwise.
*/
int iso_hash_lookup(struct iso_hash_node **table, const char *path);
/**
* Insert a new path in the hash table.
*
* \param table The hash table.
* \param path The path of a file to add to the hash table.
*
* \return 1 if the file wasn't already in the hash table, 0 otherwise.
*/
int iso_hash_insert(struct iso_hash_node **table, const char *path);
/**
* Remove a path from the hash table.
*
* \param table The hash table.
* \param path The path of a file to remove from the hash table.
*
* \return 1 if the file was found and removed, 0 otherwise.
*/
int iso_hash_remove(struct iso_hash_node **table, const char *path);
/**
* Empty the hash table.
*/
void iso_hash_empty(struct iso_hash_node **table);
#endif /* ISO_HASH_H */