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- tidier flag checking code

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- finished the is_mangled() function
This commit is contained in:
Andrew Tridgell -
parent 8d6f2e2399
commit 128bec2071
1 changed files with 40 additions and 8 deletions
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48
source/smbd/mangle_hash2.c
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@ -76,6 +76,8 @@
/* these tables are used to provide fast tests for characters */
static unsigned char char_flags[256];
#define FLAG_CHECK(c, flag) (char_flags[(unsigned char)(c)] & (flag))
/* we will use a very simple direct mapped prefix cache. The big
advantage of this cache structure is speed and low memory usage
@ -183,12 +185,41 @@ static const char *cache_lookup(u32 hash)
*/
static BOOL is_mangled(const char *name)
{
int len, i;
M_DEBUG(0,("is_mangled %s\n", name));
/* the best distinguishing characteristic is the ~ */
if (name[6] != '~') return False;
/* check the length */
len = strlen(name);
if (len > 12 || len < 8) return False;
/* check extension */
if (len > 8) {
if (name[8] != '.') return False;
for (i=9; name[i]; i++) {
if (! FLAG_CHECK(name[i], FLAG_ASCII)) {
return False;
}
}
}
/* check first character */
if (! FLAG_CHECK(name[0], FLAG_ASCII)) {
return False;
}
/* check rest of hash */
if (! FLAG_CHECK(name[7], FLAG_BASECHAR)) {
return False;
}
for (i=1;i<6;i++) {
if (! FLAG_CHECK(name[i], FLAG_BASECHAR)) {
return False;
}
}
return True;
}
@ -251,7 +282,8 @@ static BOOL is_8_3(const char *name, BOOL check_case)
/* the length are all OK. Now check to see if the characters themselves are OK */
for (i=0; name[i]; i++) {
if (!(char_flags[(unsigned)(name[i])] & (FLAG_ASCII|FLAG_WILDCARD))) {
/* note that we allow wildcard petterns! */
if (!FLAG_CHECK(name[i], FLAG_ASCII|FLAG_WILDCARD)) {
return False;
}
}
@ -324,10 +356,10 @@ static BOOL check_cache(char *name)
*/
static BOOL is_reserved_name(const char *name)
{
if ((char_flags[(unsigned char)name[0]] & FLAG_POSSIBLE1) &&
(char_flags[(unsigned char)name[1]] & FLAG_POSSIBLE2) &&
(char_flags[(unsigned char)name[2]] & FLAG_POSSIBLE3) &&
(char_flags[(unsigned char)name[3]] & FLAG_POSSIBLE4)) {
if (FLAG_CHECK(name[0], FLAG_POSSIBLE1) &&
FLAG_CHECK(name[1], FLAG_POSSIBLE2) &&
FLAG_CHECK(name[2], FLAG_POSSIBLE3) &&
FLAG_CHECK(name[3], FLAG_POSSIBLE4)) {
/* a likely match, scan the lot */
int i;
for (i=0; reserved_names[i]; i++) {
@ -349,7 +381,7 @@ static BOOL is_reserved_name(const char *name)
static BOOL is_legal_name(const char *name)
{
while (*name) {
if (char_flags[(unsigned char)*name] & FLAG_ILLEGAL) {
if (FLAG_CHECK(name[0], FLAG_ILLEGAL)) {
return False;
}
name++;
@ -402,7 +434,7 @@ static BOOL name_map(char *name, BOOL need83, BOOL cache83)
otherwise '_' is used
*/
lead_char = name[0];
if (! (char_flags[(unsigned char)lead_char] & FLAG_ASCII)) {
if (! FLAG_CHECK(lead_char, FLAG_ASCII)) {
lead_char = '_';
}
lead_char = toupper(lead_char);
@ -420,7 +452,7 @@ static BOOL name_map(char *name, BOOL need83, BOOL cache83)
if (dot_p) {
for (i=1; extension_length < 3 && dot_p[i]; i++) {
char c = dot_p[i];
if (char_flags[(unsigned char)c] & FLAG_ASCII) {
if (FLAG_CHECK(c, FLAG_ASCII)) {
extension[extension_length++] = toupper(c);
}
}