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Diffstat (limited to 'alsa-utils/alsactl/init_utils_string.c')
-rw-r--r--alsa-utils/alsactl/init_utils_string.c194
1 files changed, 0 insertions, 194 deletions
diff --git a/alsa-utils/alsactl/init_utils_string.c b/alsa-utils/alsactl/init_utils_string.c
deleted file mode 100644
index 2598e9f..0000000
--- a/alsa-utils/alsactl/init_utils_string.c
+++ /dev/null
@@ -1,194 +0,0 @@
-/*
- * Copyright (C) 2004-2005 Kay Sievers <kay.sievers@vrfy.org>
- *
- * 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 version 2 of the License.
- *
- * 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.,
- * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
- *
- */
-
-
-static int string_is_true(const char *str)
-{
- if (strcasecmp(str, "true") == 0)
- return 1;
- if (strcasecmp(str, "yes") == 0)
- return 1;
- if (strcasecmp(str, "1") == 0)
- return 1;
- return 0;
-}
-
-static void remove_trailing_chars(char *path, char c)
-{
- size_t len;
-
- len = strlen(path);
- while (len > 0 && path[len-1] == c)
- path[--len] = '\0';
-}
-
-/* count of characters used to encode one unicode char */
-static int utf8_encoded_expected_len(const char *str)
-{
- unsigned char c = (unsigned char)str[0];
-
- if (c < 0x80)
- return 1;
- if ((c & 0xe0) == 0xc0)
- return 2;
- if ((c & 0xf0) == 0xe0)
- return 3;
- if ((c & 0xf8) == 0xf0)
- return 4;
- if ((c & 0xfc) == 0xf8)
- return 5;
- if ((c & 0xfe) == 0xfc)
- return 6;
- return 0;
-}
-
-/* decode one unicode char */
-static int utf8_encoded_to_unichar(const char *str)
-{
- int unichar;
- int len;
- int i;
-
- len = utf8_encoded_expected_len(str);
- switch (len) {
- case 1:
- return (int)str[0];
- case 2:
- unichar = str[0] & 0x1f;
- break;
- case 3:
- unichar = (int)str[0] & 0x0f;
- break;
- case 4:
- unichar = (int)str[0] & 0x07;
- break;
- case 5:
- unichar = (int)str[0] & 0x03;
- break;
- case 6:
- unichar = (int)str[0] & 0x01;
- break;
- default:
- return -1;
- }
-
- for (i = 1; i < len; i++) {
- if (((int)str[i] & 0xc0) != 0x80)
- return -1;
- unichar <<= 6;
- unichar |= (int)str[i] & 0x3f;
- }
-
- return unichar;
-}
-
-/* expected size used to encode one unicode char */
-static int utf8_unichar_to_encoded_len(int unichar)
-{
- if (unichar < 0x80)
- return 1;
- if (unichar < 0x800)
- return 2;
- if (unichar < 0x10000)
- return 3;
- if (unichar < 0x200000)
- return 4;
- if (unichar < 0x4000000)
- return 5;
- return 6;
-}
-
-/* check if unicode char has a valid numeric range */
-static int utf8_unichar_valid_range(int unichar)
-{
- if (unichar > 0x10ffff)
- return 0;
- if ((unichar & 0xfffff800) == 0xd800)
- return 0;
- if ((unichar > 0xfdcf) && (unichar < 0xfdf0))
- return 0;
- if ((unichar & 0xffff) == 0xffff)
- return 0;
- return 1;
-}
-
-/* validate one encoded unicode char and return its length */
-static int utf8_encoded_valid_unichar(const char *str)
-{
- int len;
- int unichar;
- int i;
-
- len = utf8_encoded_expected_len(str);
- if (len == 0)
- return -1;
-
- /* ascii is valid */
- if (len == 1)
- return 1;
-
- /* check if expected encoded chars are available */
- for (i = 0; i < len; i++)
- if ((str[i] & 0x80) != 0x80)
- return -1;
-
- unichar = utf8_encoded_to_unichar(str);
-
- /* check if encoded length matches encoded value */
- if (utf8_unichar_to_encoded_len(unichar) != len)
- return -1;
-
- /* check if value has valid range */
- if (!utf8_unichar_valid_range(unichar))
- return -1;
-
- return len;
-}
-
-/* replace everything but whitelisted plain ascii and valid utf8 */
-static int replace_untrusted_chars(char *str)
-{
- size_t i = 0;
- int replaced = 0;
-
- while (str[i] != '\0') {
- int len;
-
- /* valid printable ascii char */
- if ((str[i] >= '0' && str[i] <= '9') ||
- (str[i] >= 'A' && str[i] <= 'Z') ||
- (str[i] >= 'a' && str[i] <= 'z') ||
- strchr(" #$%+-./:=?@_,", str[i])) {
- i++;
- continue;
- }
- /* valid utf8 is accepted */
- len = utf8_encoded_valid_unichar(&str[i]);
- if (len > 1) {
- i += len;
- continue;
- }
-
- /* everything else is garbage */
- str[i] = '_';
- i++;
- replaced++;
- }
-
- return replaced;
-}