diff options
Diffstat (limited to 'src/libudev/libudev-util.c')
| -rw-r--r-- | src/libudev/libudev-util.c | 171 |
1 files changed, 3 insertions, 168 deletions
diff --git a/src/libudev/libudev-util.c b/src/libudev/libudev-util.c index ae5e285ec0..b4452f60d4 100644 --- a/src/libudev/libudev-util.c +++ b/src/libudev/libudev-util.c @@ -37,6 +37,7 @@ #include "libudev.h" #include "libudev-private.h" +#include "utf8.h" /** * SECTION:libudev-util @@ -314,129 +315,6 @@ void util_remove_trailing_chars(char *path, char 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; -} - int util_replace_whitespace(const char *str, char *to, size_t len) { size_t i, j; @@ -465,17 +343,6 @@ int util_replace_whitespace(const char *str, char *to, size_t len) return 0; } -static int is_whitelisted(char c, const char *white) -{ - if ((c >= '0' && c <= '9') || - (c >= 'A' && c <= 'Z') || - (c >= 'a' && c <= 'z') || - strchr("#+-.:=@_", c) != NULL || - (white != NULL && strchr(white, c) != NULL)) - return 1; - return 0; -} - /* allow chars in whitelist, plain ascii, hex-escaping and valid utf8 */ int util_replace_chars(char *str, const char *white) { @@ -485,7 +352,7 @@ int util_replace_chars(char *str, const char *white) while (str[i] != '\0') { int len; - if (is_whitelisted(str[i], white)) { + if (is_utf8_encoding_whitelisted(str[i], white)) { i++; continue; } @@ -533,39 +400,7 @@ int util_replace_chars(char *str, const char *white) **/ _public_ int udev_util_encode_string(const char *str, char *str_enc, size_t len) { - size_t i, j; - - if (str == NULL || str_enc == NULL) - return -1; - - for (i = 0, j = 0; str[i] != '\0'; i++) { - int seqlen; - - seqlen = utf8_encoded_valid_unichar(&str[i]); - if (seqlen > 1) { - if (len-j < (size_t)seqlen) - goto err; - memcpy(&str_enc[j], &str[i], seqlen); - j += seqlen; - i += (seqlen-1); - } else if (str[i] == '\\' || !is_whitelisted(str[i], NULL)) { - if (len-j < 4) - goto err; - sprintf(&str_enc[j], "\\x%02x", (unsigned char) str[i]); - j += 4; - } else { - if (len-j < 1) - goto err; - str_enc[j] = str[i]; - j++; - } - } - if (len-j < 1) - goto err; - str_enc[j] = '\0'; - return 0; -err: - return -1; + return udev_encode_string(str, str_enc, len); } /* |