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/* -*- mode: C; c-file-style: "gnu" -*- */
/* dbus-sysdeps.c Wrappers around system/libc features (internal to D-BUS implementation)
*
* Copyright (C) 2002 Red Hat, Inc.
*
* Licensed under the Academic Free License version 1.2
*
* 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
*
*/
#include "dbus-sysdeps.h"
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <stdio.h>
#include <errno.h>
/**
* @addtogroup DBusInternalsUtils
* @{
*/
/**
* Aborts the program with SIGABRT (dumping core).
*/
void
_dbus_abort (void)
{
abort ();
_exit (1); /* in case someone manages to ignore SIGABRT */
}
/**
* Wrapper for getenv().
*
* @param varname name of environment variable
* @returns value of environment variable or #NULL if unset
*/
const char*
_dbus_getenv (const char *varname)
{
return getenv (varname);
}
/** @} */
/**
* @addtogroup DBusString
*
* @{
*/
/**
* Appends an integer to a DBusString.
*
* @param str the string
* @param value the integer value
* @returns #FALSE if not enough memory or other failure.
*/
dbus_bool_t
_dbus_string_append_int (DBusString *str,
long value)
{
/* this calculation is from comp.lang.c faq */
#define MAX_LONG_LEN ((sizeof (long) * 8 + 2) / 3 + 1) /* +1 for '-' */
int orig_len;
int i;
char *buf;
orig_len = _dbus_string_get_length (str);
if (!_dbus_string_lengthen (str, MAX_LONG_LEN))
return FALSE;
_dbus_string_get_data_len (str, &buf, orig_len, MAX_LONG_LEN);
snprintf (buf, MAX_LONG_LEN, "%ld", value);
i = 0;
while (*buf)
{
++buf;
++i;
}
_dbus_string_shorten (str, MAX_LONG_LEN - i);
return TRUE;
}
/**
* Appends a double to a DBusString.
*
* @param str the string
* @param value the floating point value
* @returns #FALSE if not enough memory or other failure.
*/
dbus_bool_t
_dbus_string_append_double (DBusString *str,
double value)
{
#define MAX_DOUBLE_LEN 64 /* this is completely made up :-/ */
int orig_len;
char *buf;
int i;
orig_len = _dbus_string_get_length (str);
if (!_dbus_string_lengthen (str, MAX_DOUBLE_LEN))
return FALSE;
_dbus_string_get_data_len (str, &buf, orig_len, MAX_DOUBLE_LEN);
snprintf (buf, MAX_LONG_LEN, "%g", value);
i = 0;
while (*buf)
{
++buf;
++i;
}
_dbus_string_shorten (str, MAX_DOUBLE_LEN - i);
return TRUE;
}
/**
* Parses an integer contained in a DBusString. Either return parameter
* may be #NULL if you aren't interested in it. The integer is parsed
* and stored in value_return. Return parameters are not initialized
* if the function returns #FALSE.
*
* @param str the string
* @param start the byte index of the start of the integer
* @param value_return return location of the integer value or #NULL
* @param end_return return location of the end of the integer, or #NULL
* @returns #TRUE on success
*/
dbus_bool_t
_dbus_string_parse_int (const DBusString *str,
int start,
long *value_return,
int *end_return)
{
long v;
const char *p;
char *end;
_dbus_string_get_const_data_len (str, &p, start,
_dbus_string_get_length (str) - start);
end = NULL;
errno = 0;
v = strtol (p, &end, 0);
if (end == NULL || end == p || errno != 0)
return FALSE;
if (value_return)
*value_return = v;
if (end_return)
*end_return = (end - p);
return TRUE;
}
/**
* Parses a floating point number contained in a DBusString. Either
* return parameter may be #NULL if you aren't interested in it. The
* integer is parsed and stored in value_return. Return parameters are
* not initialized if the function returns #FALSE.
*
* @todo this function is currently locale-dependent. Should
* ask alexl to relicense g_ascii_strtod() code and put that in
* here instead, so it's locale-independent.
*
* @param str the string
* @param start the byte index of the start of the float
* @param value_return return location of the float value or #NULL
* @param end_return return location of the end of the float, or #NULL
* @returns #TRUE on success
*/
dbus_bool_t
_dbus_string_parse_double (const DBusString *str,
int start,
double *value_return,
int *end_return)
{
double v;
const char *p;
char *end;
_dbus_warn ("_dbus_string_parse_double() needs to be made locale-independent\n");
_dbus_string_get_const_data_len (str, &p, start,
_dbus_string_get_length (str) - start);
end = NULL;
errno = 0;
v = strtod (p, &end);
if (end == NULL || end == p || errno != 0)
return FALSE;
if (value_return)
*value_return = v;
if (end_return)
*end_return = (end - p);
return TRUE;
}
/** @} end of DBusString */
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