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Code

added some more comments

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This commit is contained in:
Andrew Tridgell -
parent 30b35d0c1f
commit 8d6f2e2399
1 changed files with 15 additions and 5 deletions
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20
source/smbd/mangle_hash2.c
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@ -54,15 +54,21 @@
#define M_DEBUG(level, x)
#endif
/* these flags are used to mark characters in as having particular
properties */
#define FLAG_BASECHAR 1
#define FLAG_ASCII 2
#define FLAG_ILLEGAL 4
#define FLAG_WILDCARD 8
/* the "possible" flags are used as a fast way to find possible DOS
reserved filenames */
#define FLAG_POSSIBLE1 16
#define FLAG_POSSIBLE2 32
#define FLAG_POSSIBLE3 64
#define FLAG_POSSIBLE4 128
/* by default have a max of 4096 entries in the cache. */
#ifndef MANGLE_CACHE_SIZE
#define MANGLE_CACHE_SIZE 4096
#endif
@ -100,11 +106,15 @@ static u32 mangle_hash(const char *key, unsigned length)
u32 i;
fstring str;
/* we have to uppercase here to ensure that the mangled name
doesn't depend on the case of the long name. Note that this
is the only place where we need to use a multi-byte string
function */
strncpy(str, key, length);
str[length] = 0;
strupper_m(str);
/* the length of a multi-byte string can change after a strupper */
/* the length of a multi-byte string can change after a strupper_m */
length = strlen(str);
/* Set the initial value from the key size. */
@ -116,7 +126,7 @@ static u32 mangle_hash(const char *key, unsigned length)
}
/*
initialise the prefix cache
initialise (ie. allocate) the prefix cache
*/
static BOOL cache_init(void)
{
@ -134,8 +144,8 @@ static BOOL cache_init(void)
}
/*
insert an entry into the prefix cache. The string may not be null terminated
*/
insert an entry into the prefix cache. The string might not be null
terminated */
static void cache_insert(const char *prefix, int length, u32 hash)
{
int i = hash % MANGLE_CACHE_SIZE;
@ -419,7 +429,7 @@ static BOOL name_map(char *name, BOOL need83, BOOL cache83)
/* find the hash for this prefix */
v = hash = mangle_hash(name, prefix_len);
/* now form the mangled name */
/* now form the mangled name. */
new_name[0] = lead_char;
new_name[7] = base_forward(v % 36);
new_name[6] = '~';