fafc90526b
_nm_utils_ascii_str_to_int64() was declared in libnm-core's internal header "nm-core-internal.h" and thus available for libnm-core, libnm, NetworkManager and related. It also means, the function was not available in libnm-util, libnm-glib, clients or dispatcher. So, we either reimplemented it (nmc_string_to_int_base) or struggle with the awkward strtol* API.
104 lines
2.9 KiB
C
104 lines
2.9 KiB
C
/* -*- Mode: C; tab-width: 4; indent-tabs-mode: t; c-basic-offset: 4 -*- */
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/* NetworkManager -- Network link manager
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301 USA.
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*
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* (C) Copyright 2016 Red Hat, Inc.
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*/
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#include "nm-default.h"
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#include "nm-shared-utils.h"
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#include <errno.h>
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/*****************************************************************************/
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/* _nm_utils_ascii_str_to_int64:
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*
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* A wrapper for g_ascii_strtoll, that checks whether the whole string
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* can be successfully converted to a number and is within a given
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* range. On any error, @fallback will be returned and %errno will be set
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* to a non-zero value. On success, %errno will be set to zero, check %errno
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* for errors. Any trailing or leading (ascii) white space is ignored and the
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* functions is locale independent.
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*
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* The function is guaranteed to return a value between @min and @max
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* (inclusive) or @fallback. Also, the parsing is rather strict, it does
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* not allow for any unrecognized characters, except leading and trailing
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* white space.
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**/
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gint64
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_nm_utils_ascii_str_to_int64 (const char *str, guint base, gint64 min, gint64 max, gint64 fallback)
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{
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gint64 v;
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size_t len;
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char buf[64], *s, *str_free = NULL;
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if (str) {
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while (g_ascii_isspace (str[0]))
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str++;
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}
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if (!str || !str[0]) {
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errno = EINVAL;
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return fallback;
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}
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len = strlen (str);
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if (g_ascii_isspace (str[--len])) {
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/* backward search the first non-ws character.
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* We already know that str[0] is non-ws. */
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while (g_ascii_isspace (str[--len]))
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;
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/* str[len] is now the last non-ws character... */
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len++;
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if (len >= sizeof (buf))
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s = str_free = g_malloc (len + 1);
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else
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s = buf;
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memcpy (s, str, len);
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s[len] = 0;
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nm_assert (len > 0 && len < strlen (str) && len == strlen (s));
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nm_assert (!g_ascii_isspace (str[len-1]) && g_ascii_isspace (str[len]));
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nm_assert (strncmp (str, s, len) == 0);
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str = s;
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}
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errno = 0;
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v = g_ascii_strtoll (str, &s, base);
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if (errno != 0)
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v = fallback;
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else if (s[0] != 0) {
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errno = EINVAL;
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v = fallback;
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} else if (v > max || v < min) {
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errno = ERANGE;
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v = fallback;
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}
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if (G_UNLIKELY (str_free))
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g_free (str_free);
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return v;
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}
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/*****************************************************************************/
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