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/*
* Copyright (c) 2005, Stefan Walter
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above
* copyright notice, this list of conditions and the
* following disclaimer.
* * Redistributions in binary form must reproduce the
* above copyright notice, this list of conditions and
* the following disclaimer in the documentation and/or
* other materials provided with the distribution.
* * The names of contributors to this software may not be
* used to endorse or promote products derived from this
* software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
* THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
* DAMAGE.
*
*
* CONTRIBUTORS
* Stef Walter <stef@memberwebs.com>
*/
#include "config.h"
#include "conf.h"
#include <sys/param.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <assert.h>
#include <ctype.h>
#include <dirent.h>
#include <errno.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
static void
errmsg (conf_error_func error_func, const char* msg, ...)
{
#define MAX_MSGLEN 1024
char buf[MAX_MSGLEN];
va_list ap;
if (!error_func)
return;
va_start (ap, msg);
vsnprintf (buf, MAX_MSGLEN, msg, ap);
buf[MAX_MSGLEN - 1] = 0;
error_func (buf);
va_end (ap);
}
static void
strcln (char* data, char ch)
{
char* p;
for (p = data; *data; data++, p++) {
while (*data == ch)
data++;
*p = *data;
}
/* Renull terminate */
*p = 0;
}
static char*
strbtrim (const char* data)
{
while (*data && isspace (*data))
++data;
return (char*)data;
}
static void
stretrim (char* data)
{
char* t = data + strlen (data);
while (t > data && isspace (*(t - 1))) {
t--;
*t = 0;
}
}
static char*
strtrim (char* data)
{
data = (char*)strbtrim (data);
stretrim (data);
return data;
}
/* -----------------------------------------------------------------------------
* CONFIG PARSER
*/
static char*
read_config_file (const char* filename, int flags,
conf_error_func error_func)
{
char* config = NULL;
FILE* f = NULL;
long len;
assert (filename);
f = fopen (filename, "r");
if (f == NULL) {
if ((flags & CONF_IGNORE_MISSING) &&
(errno == ENOENT || errno == ENOTDIR)) {
config = strdup ("\n");
if (!config)
errno = ENOMEM;
return config;
}
errmsg (error_func, "couldn't open config file: %s", filename);
return NULL;
}
/* Figure out size */
if (fseek (f, 0, SEEK_END) == -1 ||
(len = ftell (f)) == -1 ||
fseek (f, 0, SEEK_SET) == -1) {
errmsg (error_func, "couldn't seek config file: %s", filename);
return NULL;
}
if ((config = (char*)malloc (len + 2)) == NULL) {
errmsg (error_func, "out of memory");
errno = ENOMEM;
return NULL;
}
/* And read in one block */
if (fread (config, 1, len, f) != len) {
errmsg (error_func, "couldn't read config file: %s", filename);
return NULL;
}
fclose (f);
/* Null terminate the data */
config[len] = '\n';
config[len + 1] = 0;
/* Remove nasty dos line endings */
strcln (config, '\r');
return config;
}
hash_t*
conf_parse_file (const char* filename, int flags,
conf_error_func error_func)
{
char *name;
char *value;
hash_t *ht = NULL;
char *config;
char *next;
char *end;
assert (filename);
/* Adds an extra newline to end of file */
config = read_config_file (filename, flags, error_func);
if (!config)
return NULL;
ht = hash_create (hash_string_hash, hash_string_equal, free, free);
next = config;
/* Go through lines and process them */
while ((end = strchr (next, '\n')) != NULL) {
*end = 0;
name = strbtrim (next);
next = end + 1;
/* Empty lines / comments at start */
if (!*name || *name == '#')
continue;
/* Look for the break between name: value on the same line */
value = name + strcspn (name, ":");
if (!*value) {
errmsg (error_func, "%s: invalid config line: %s", filename, name);
errno = EINVAL;
break;
}
/* Null terminate and split value part */
*value = 0;
value++;
name = strtrim (name);
value = strtrim (value);
name = strdup (name);
if (!name) {
errno = ENOMEM;
break;
}
value = strdup (value);
if (!value) {
free (name);
errno = ENOMEM;
break;
}
if (!hash_set (ht, name, value)) {
free (name);
free (value);
errno = ENOMEM;
break;
}
}
/* Unsuccessful? */
if (end != NULL) {
hash_free (ht);
ht = NULL;
}
free (config);
return ht;
}
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