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authorHavoc Pennington <hp@redhat.com>2002-12-12 04:26:46 +0000
committerHavoc Pennington <hp@redhat.com>2002-12-12 04:26:46 +0000
commitd4b870e7f91b7018524f7b85dc00b90cc64453bf (patch)
tree2030a48f0fd0bcebc37ebc1cb9a69c56bf0ad5dd /dbus/dbus-sysdeps.c
parent652aa5e14cbd6c87ff8ce19ba37168ad876151a8 (diff)
2002-12-11 Havoc Pennington <hp@pobox.com>
* dbus/dbus-types.h: add dbus_unichar * dbus/dbus-internals.c (_dbus_verbose): use _dbus_getenv * dbus/dbus-connection.c (dbus_connection_send_message): return TRUE on success * dbus/dbus-transport.c: include dbus-watch.h * dbus/dbus-connection.c: include dbus-message-internal.h * HACKING: add file with coding guidelines stuff. * dbus/dbus-string.h, dbus/dbus-string.c: Encapsulate all string handling here, for security purposes (as in vsftpd). Not actually using this class yet. * dbus/dbus-sysdeps.h, dbus/dbus-sysdeps.c: Encapsulate all system/libc usage here, as in vsftpd, for ease of auditing (and should also simplify portability). Haven't actually moved all the system/libc usage into here yet.
Diffstat (limited to 'dbus/dbus-sysdeps.c')
-rw-r--r--dbus/dbus-sysdeps.c223
1 files changed, 223 insertions, 0 deletions
diff --git a/dbus/dbus-sysdeps.c b/dbus/dbus-sysdeps.c
new file mode 100644
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+++ b/dbus/dbus-sysdeps.c
@@ -0,0 +1,223 @@
+/* -*- 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 */