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NeoStats/keeper/kp_iface.c
2004-01-14 11:36:37 +00:00

482 lines
12 KiB
C

/* NeoStats - IRC Statistical Services
** Copyright (c) 1999-2004 Adam Rutter, Justin Hammond
** http://www.neostats.net/
**
** 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 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
**
** NeoStats CVS Identification
** $Id$
*/
/*
* KEEPER: A configuration reading and writing library
*
* Copyright (C) 1999-2000 Miklos Szeredi
* Email: mszeredi@inf.bme.hu
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 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
* Library 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, write to the Free
* Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
* MA 02111-1307, USA
*/
#include "kp_util.h"
#include <errno.h>
#include <sys/stat.h>
/* -------------------------------------------------------------------------
* Checks the key-path for correct syntax
* ------------------------------------------------------------------------- */
static int kp_check_path(const char *keypath)
{
int seglen, segbeg;
int i;
int colonfound;
/* Check for the following:
- only one / per segment
- : only appears once, and only at end or before /
- path does not contain . or .. segments
- path does not contain non printable characters
- path does not end with /
*/
colonfound = 0;
segbeg = 0;
i = 0;
do {
if ((keypath[i] > 0 && keypath[i] < 32)
|| keypath[i] == 127)
return KPERR_BADKEY;
if (keypath[i] == '/' || keypath[i] == ':'
|| keypath[i] == '\0') {
seglen = i - segbeg;
if (keypath[i] == ':') {
if (colonfound)
return KPERR_BADKEY;
if (keypath[i + 1] != '/'
&& keypath[i + 1] != '\0')
return KPERR_BADKEY;
colonfound = 1;
i++;
}
if (i > 0) {
if (seglen == 0)
return KPERR_BADKEY;
if (seglen == 1 && keypath[segbeg] == '.')
return KPERR_BADKEY;
if (seglen == 2 && keypath[segbeg] == '.'
&& keypath[segbeg + 1] == '.')
return KPERR_BADKEY;
}
segbeg = i + 1;
}
} while (keypath[i++]);
return 0;
}
/* -------------------------------------------------------------------------
* Get the value of the key, iterate through the sections
* ------------------------------------------------------------------------- */
static int kp_get(const char *keypath, kp_key * ck, kpval_t type)
{
kp_path kpp;
char *keyname;
int iskeyfile;
int res;
res = kp_check_path(keypath);
if (res != 0)
return res;
do {
res = _kp_get_path(keypath, &kpp, &keyname, &iskeyfile);
if (res != 0)
return res;
if (iskeyfile && !keyname[0])
res = KPERR_BADKEY;
else {
res = _kp_cache_get(&kpp, keyname, type, ck);
}
free(kpp.path);
keypath++;
} while (res == KPERR_NOKEY);
return res;
}
/* -------------------------------------------------------------------------
* Get a string value
* ------------------------------------------------------------------------- */
int kp_get_string(const char *keypath, char **stringp)
{
int res;
kp_key ck;
res = kp_get(keypath, &ck, KPVAL_STRING);
if (res != 0)
return res;
*stringp = (char *) malloc_check(ck.len + 1);
memcpy(*stringp, ck.data, ck.len);
(*stringp)[ck.len] = '\0';
kp_value_destroy(&ck);
return res;
}
/* -------------------------------------------------------------------------
* Get an integer value
* ------------------------------------------------------------------------- */
int kp_get_int(const char *keypath, int *intp)
{
int res;
kp_key ck;
res = kp_get(keypath, &ck, KPVAL_INT);
if (res != 0)
return res;
*intp = *((int *) ck.data);
kp_value_destroy(&ck);
return res;
}
/* -------------------------------------------------------------------------
* Get a float value
* ------------------------------------------------------------------------- */
int kp_get_float(const char *keypath, double *floatp)
{
int res;
kp_key ck;
res = kp_get(keypath, &ck, KPVAL_FLOAT);
if (res != 0)
return res;
*floatp = *((double *) ck.data);
kp_value_destroy(&ck);
return res;
}
/* -------------------------------------------------------------------------
* Get an arbitary data (stored as a character array)
* ------------------------------------------------------------------------- */
int kp_get_data(const char *keypath, void **datap, unsigned int *lenp)
{
int res;
kp_key ck;
res = kp_get(keypath, &ck, KPVAL_DATA);
if (res != 0)
return res;
*datap = malloc_check(ck.len);
memcpy(*datap, ck.data, ck.len);
*lenp = ck.len;
kp_value_destroy(&ck);
return res;
}
/* -------------------------------------------------------------------------
* Copy the key-name strings to the end of the array, and free them
* ------------------------------------------------------------------------- */
static void kp_combine_strings(struct key_array *keys)
{
char *s;
int strsize;
char **kp;
s = ((char *) keys->array) + (sizeof(char *) * (keys->num + 1));
for (kp = keys->array; *kp != NULL; kp++) {
strsize = strlen(*kp) + 1;
strsize = ROUND_TO(strsize, 8);
strcpy(s, *kp);
free(*kp);
*kp = s;
s += strsize;
}
}
/* -------------------------------------------------------------------------
* Free the key-names in the array, and the array itself
* ------------------------------------------------------------------------- */
static void kp_free_keyarray(struct key_array *keys)
{
char **kp;
for (kp = keys->array; *kp != NULL; kp++)
free(*kp);
free(keys->array);
}
/* -------------------------------------------------------------------------
* Get the subkeys in a dir, iterate through all sections
* ------------------------------------------------------------------------- */
static int kp_get_subkeys(const char *keypath, struct key_array *keys)
{
kp_path kpp;
char *keyname;
int iskeyfile;
int res;
res = kp_check_path(keypath);
if (res != 0)
return res;
while (keypath[0] != '\0' && keypath[0] != '/') {
res = _kp_get_path(keypath, &kpp, &keyname, &iskeyfile);
if (res == 0) {
_kp_cache_get_subkeys(&kpp, keyname, iskeyfile,
keys);
free(kpp.path);
}
keypath++;
}
return 0;
}
/* -------------------------------------------------------------------------
* Get the subkeys in a dir, return the compact (one alloc) key array
* ------------------------------------------------------------------------- */
int kp_get_dir(const char *keypath, char ***keysp, unsigned int *nump)
{
int res;
struct key_array keys;
keys.array = (char **) malloc_check(sizeof(char *));
keys.array[0] = NULL;
keys.num = 0;
keys.strsize = 0;
res = kp_get_subkeys(keypath, &keys);
if (res == 0) {
kp_combine_strings(&keys);
*keysp = keys.array;
if (nump != NULL)
*nump = keys.num;
} else
kp_free_keyarray(&keys);
return res;
}
/* -------------------------------------------------------------------------
* Get the type of a key, iterate through the sections
* ------------------------------------------------------------------------- */
int kp_get_type(const char *keypath, kpval_t * typep)
{
kp_path kpp;
char *keyname;
int iskeyfile;
int res;
res = kp_check_path(keypath);
if (res != 0)
return res;
do {
res = _kp_get_path(keypath, &kpp, &keyname, &iskeyfile);
if (res != 0)
return res;
res = _kp_cache_get_type(&kpp, keyname, iskeyfile, typep);
free(kpp.path);
keypath++;
} while (res == KPERR_NOKEY);
return res;
}
/* -------------------------------------------------------------------------
* Set the value of the key, only the first section is set
* ------------------------------------------------------------------------- */
static int kp_set(const char *keypath, kp_key * ck)
{
kp_path kpp;
char *keyname;
int res;
int iskeyfile;
res = kp_check_path(keypath);
if (res != 0)
return res;
res = _kp_get_path(keypath, &kpp, &keyname, &iskeyfile);
if (res != 0)
return res;
if (iskeyfile && !keyname[0])
res = KPERR_BADKEY;
else {
ck->name = strdup_check(keyname);
res = _kp_cache_set(&kpp, ck);
}
free(kpp.path);
return res;
}
/* -------------------------------------------------------------------------
* Set a string value
* ------------------------------------------------------------------------- */
int kp_set_string(const char *keypath, const char *string)
{
int res;
kp_key ck;
unsigned int len;
len = strlen(string);
kp_value_new(&ck, KPVAL_STRING, len, string);
res = kp_set(keypath, &ck);
kp_value_destroy(&ck);
return res;
}
/* -------------------------------------------------------------------------
* Set an integer value
* ------------------------------------------------------------------------- */
int kp_set_int(const char *keypath, int intval)
{
int res;
kp_key ck;
unsigned int len;
len = sizeof(int);
kp_value_new(&ck, KPVAL_INT, len, &intval);
res = kp_set(keypath, &ck);
kp_value_destroy(&ck);
return res;
}
/* -------------------------------------------------------------------------
* Set a float value
* ------------------------------------------------------------------------- */
int kp_set_float(const char *keypath, double floatval)
{
int res;
kp_key ck;
unsigned int len;
len = sizeof(double);
kp_value_new(&ck, KPVAL_FLOAT, len, &floatval);
res = kp_set(keypath, &ck);
kp_value_destroy(&ck);
return res;
}
/* -------------------------------------------------------------------------
* Set an arbitary data (stored as a character array)
* ------------------------------------------------------------------------- */
int kp_set_data(const char *keypath, const void *data, unsigned int len)
{
int res;
kp_key ck;
kp_value_new(&ck, KPVAL_DATA, len, data);
res = kp_set(keypath, &ck);
kp_value_destroy(&ck);
return res;
}
/* -------------------------------------------------------------------------
* Remove a key
* ------------------------------------------------------------------------- */
int kp_remove(const char *keypath)
{
int res;
kp_key ck;
kp_value_new(&ck, KPVAL_UNKNOWN, 0, NULL);
ck.flags |= KPFL_REMOVED;
res = kp_set(keypath, &ck);
return res;
}
/* -------------------------------------------------------------------------
* Flush changes to disk
* ------------------------------------------------------------------------- */
int kp_flush()
{
int res;
res = _kp_cache_flush();
return res;
}
/* -------------------------------------------------------------------------
* Return a string corresponding to an error value
* ------------------------------------------------------------------------- */
char *kp_strerror(int kperr)
{
switch (kperr) {
case KPERR_OK:
return "OK";
case KPERR_NOKEY:
return "Key does not exist";
case KPERR_NOACCES:
return "Access denied";
case KPERR_BADKEY:
return "Bad key";
case KPERR_BADTYPE:
return "Bad type";
case KPERR_BADDB:
return "Bad database";
case KPERR_NOSPACE:
return "Not enough resources";
default:
return NULL;
}
}
/* End of kp_iface.c */