#include <stdint.h>
#include <stdlib.h>
#include <string.h>
+#include <limits.h>
//dbg
#include <stdio.h>
#include "libcitadel.h"
char **MyKeys; /**< this keeps the members for a call of GetHashKeys */
HashFunc Algorithm; /**< should we use an alternating algorithm to calc the hash values? */
long nMembersUsed; /**< how many pointers inside of the array are used? */
+ long nLookupTableItems; /**< how many items of the lookup table are used? */
long MemberSize; /**< how big is Members and LookupTable? */
long tainted; /**< if 0, we're hashed, else s.b. else sorted us in his own way. */
long uniq; /**< are the keys going to be uniq? */
if (Hash == NULL)
return 0;
- for (i=0; i < Hash->nMembersUsed; i++) {
+ for (i=0; i < Hash->nLookupTableItems; i++) {
if (i==0) {
Previous = NULL;
}
if (Hash->MyKeys != NULL)
free (Hash->MyKeys);
- Hash->MyKeys = (char**) malloc(sizeof(char*) * Hash->nMembersUsed);
+ Hash->MyKeys = (char**) malloc(sizeof(char*) * Hash->nLookupTableItems);
#ifdef DEBUG
printf("----------------------------------\n");
#endif
- for (i=0; i < Hash->nMembersUsed; i++) {
+ for (i=0; i < Hash->nLookupTableItems; i++) {
if (Hash->LookupTable[i] == NULL)
{
int GetCount(HashList *Hash)
{
if(Hash==NULL) return 0;
- return Hash->nMembersUsed;
+ return Hash->nLookupTableItems;
}
FreeMe = *Hash;
if (FreeMe == NULL)
return;
+ /* even if there are sparse members already deleted... */
for (i=0; i < FreeMe->nMembersUsed; i++)
{
/** get rid of our payload */
if (Hash == NULL)
return ;
+ /** If we grew to much, this might be the place to rehash and shrink again.
+ if ((Hash->NMembersUsed > Hash->nLookupTableItems) &&
+ ((Hash->NMembersUsed - Hash->nLookupTableItems) >
+ (Hash->nLookupTableItems / 10)))
+ {
+
+
+ }
+ */
+
/** double our payload area */
NewPayloadArea = (Payload**) malloc(sizeof(Payload*) * Hash->MemberSize * 2);
memset(&NewPayloadArea[Hash->MemberSize], 0, sizeof(Payload*) * Hash->MemberSize);
/** our payload is queued at the end... */
NewHashKey->Position = Hash->nMembersUsed;
/** but if we should be sorted into a specific place... */
- if ((Hash->nMembersUsed != 0) &&
- (HashPos != Hash->nMembersUsed) ) {
+ if ((Hash->nLookupTableItems != 0) &&
+ (HashPos != Hash->nLookupTableItems) ) {
long ItemsAfter;
- ItemsAfter = Hash->nMembersUsed - HashPos;
+ ItemsAfter = Hash->nLookupTableItems - HashPos;
/** make space were we can fill us in */
if (ItemsAfter > 0)
{
Hash->Members[Hash->nMembersUsed] = NewPayloadItem;
Hash->LookupTable[HashPos] = NewHashKey;
Hash->nMembersUsed++;
+ Hash->nLookupTableItems++;
}
/**
if (Hash == NULL)
return 0;
- for (SearchPos = 0; SearchPos < Hash->nMembersUsed; SearchPos ++) {
+ for (SearchPos = 0; SearchPos < Hash->nLookupTableItems; SearchPos ++) {
if (Hash->LookupTable[SearchPos]->Key == HashBinKey){
return SearchPos;
}
if (Hash->tainted)
return FindInTaintedHash(Hash, HashBinKey);
- SearchPos = Hash->nMembersUsed / 2;
+ SearchPos = Hash->nLookupTableItems / 2;
StepWidth = SearchPos / 2;
while ((SearchPos > 0) &&
- (SearchPos < Hash->nMembersUsed))
+ (SearchPos < Hash->nLookupTableItems))
{
/** Did we find it? */
if (Hash->LookupTable[SearchPos]->Key == HashBinKey){
SearchPos --;
}
else {
- if ((SearchPos + 1 < Hash->nMembersUsed) &&
+ if ((SearchPos + 1 < Hash->nLookupTableItems) &&
(Hash->LookupTable[SearchPos + 1]->Key > HashBinKey))
return SearchPos;
SearchPos ++;
/**
- * @brief another hashing algorithm; treat it as just a pointer to long.
- * @param str Our pointer to the long value
+ * @brief another hashing algorithm; treat it as just a pointer to int.
+ * @param str Our pointer to the int value
* @param len the length of the data pointed to; needs to be sizeof int, else we won't use it!
* \returns the calculated hash value
*/
-int Flathash(const char *str, long len)
+long Flathash(const char *str, long len)
{
if (len != sizeof (int))
return 0;
else return *(int*)str;
}
+/**
+ * @brief another hashing algorithm; treat it as just a pointer to long.
+ * @param str Our pointer to the long value
+ * @param len the length of the data pointed to; needs to be sizeof long, else we won't use it!
+ * \returns the calculated hash value
+ */
+long lFlathash(const char *str, long len)
+{
+ if (len != sizeof (long))
+ return 0;
+ else return *(long*)str;
+}
+
/**
* @brief private abstract wrapper around the hashing algorithm
* @param HKey the hash string
HashBinKey = CalcHashKey(Hash, HKey, HKLen);
HashAt = FindInHash(Hash, HashBinKey);
if ((HashAt < 0) || /**< Not found at the lower edge? */
- (HashAt >= Hash->nMembersUsed) || /**< Not found at the upper edge? */
+ (HashAt >= Hash->nLookupTableItems) || /**< Not found at the upper edge? */
(Hash->LookupTable[HashAt]->Key != HashBinKey)) { /**< somewhere inbetween but no match? */
*Data = NULL;
return 0;
if (Hash->MyKeys != NULL)
free (Hash->MyKeys);
- Hash->MyKeys = (char**) malloc(sizeof(char*) * Hash->nMembersUsed);
- for (i=0; i < Hash->nMembersUsed; i++) {
+ Hash->MyKeys = (char**) malloc(sizeof(char*) * Hash->nLookupTableItems);
+ for (i=0; i < Hash->nLookupTableItems; i++) {
Hash->MyKeys[i] = Hash->LookupTable[i]->HashKey;
}
*List = (char**)Hash->MyKeys;
- return Hash->nMembersUsed;
+ return Hash->nLookupTableItems;
}
/**
else
Ret->StepWidth = 1;
if (Ret->StepWidth < 0) {
- Ret->Position = Hash->nMembersUsed - 1;
+ Ret->Position = Hash->nLookupTableItems - 1;
}
else {
Ret->Position = 0;
HashBinKey = CalcHashKey(Hash, HKey, HKLen);
HashAt = FindInHash(Hash, HashBinKey);
if ((HashAt < 0) || /**< Not found at the lower edge? */
- (HashAt >= Hash->nMembersUsed) || /**< Not found at the upper edge? */
+ (HashAt >= Hash->nLookupTableItems) || /**< Not found at the upper edge? */
(Hash->LookupTable[HashAt]->Key != HashBinKey)) { /**< somewhere inbetween but no match? */
return 0;
}
*/
int DeleteEntryFromHash(HashList *Hash, HashPos *At)
{
+ Payload *FreeMe;
if (Hash == NULL)
return 0;
+ /* if lockable, lock here */
if ((Hash == NULL) ||
- (At->Position >= Hash->nMembersUsed) ||
+ (At->Position >= Hash->nLookupTableItems) ||
(At->Position < 0) ||
- (At->Position > Hash->nMembersUsed))
- return 0;
- /** get rid of our payload */
- if (Hash->Members[At->Position] != NULL)
+ (At->Position > Hash->nLookupTableItems))
{
- DeleteHashPayload(Hash->Members[At->Position]);
- free(Hash->Members[At->Position]);
- Hash->Members[At->Position] = NULL;
+ /* unlock... */
+ return 0;
}
+
+ FreeMe = Hash->Members[Hash->LookupTable[At->Position]->Position];
+ Hash->Members[Hash->LookupTable[At->Position]->Position] = NULL;
+
+
/** delete our hashing data */
if (Hash->LookupTable[At->Position] != NULL)
{
free(Hash->LookupTable[At->Position]->HashKey);
free(Hash->LookupTable[At->Position]);
- Hash->LookupTable[At->Position] = NULL;
+ if (At->Position < Hash->nLookupTableItems)
+ {
+ memmove(&Hash->LookupTable[At->Position],
+ &Hash->LookupTable[At->Position + 1],
+ (Hash->nLookupTableItems - At->Position - 1) *
+ sizeof(HashKey*));
+
+ Hash->LookupTable[Hash->nLookupTableItems - 1] = NULL;
+ }
+ else
+ Hash->LookupTable[At->Position] = NULL;
+ Hash->nLookupTableItems--;
+ }
+ /* unlock... */
+
+
+ /** get rid of our payload */
+ if (FreeMe != NULL)
+ {
+ DeleteHashPayload(FreeMe);
+ free(FreeMe);
}
return 1;
}
int GetHashPosCounter(HashList *Hash, HashPos *At)
{
if ((Hash == NULL) ||
- (At->Position >= Hash->nMembersUsed) ||
+ (At->Position >= Hash->nLookupTableItems) ||
(At->Position < 0) ||
- (At->Position > Hash->nMembersUsed))
+ (At->Position > Hash->nLookupTableItems))
return 0;
return At->Position;
}
/**
* @brief Get the data located where HashPos Iterator points at, and Move HashPos one forward
* @param Hash your Hashlist to follow
+ * @param At the position to retrieve the Item from and move forward afterwards
* @param HKLen returns Length of Hashkey Returned
* @param HashKey returns the Hashkey corrosponding to HashPos
* @param Data returns the Data found at HashPos
long PayloadPos;
if ((Hash == NULL) ||
- (At->Position >= Hash->nMembersUsed) ||
+ (At->Position >= Hash->nLookupTableItems) ||
(At->Position < 0) ||
- (At->Position > Hash->nMembersUsed))
+ (At->Position > Hash->nLookupTableItems))
return 0;
*HKLen = Hash->LookupTable[At->Position]->HKLen;
*HashKey = Hash->LookupTable[At->Position]->HashKey;
return 1;
}
+/**
+ * @brief Get the data located where HashPos Iterator points at
+ * @param Hash your Hashlist to follow
+ * @param At the position retrieve the data from
+ * @param HKLen returns Length of Hashkey Returned
+ * @param HashKey returns the Hashkey corrosponding to HashPos
+ * @param Data returns the Data found at HashPos
+ * \returns whether the item was found or not.
+ */
+int GetHashPos(HashList *Hash, HashPos *At, long *HKLen, const char **HashKey, void **Data)
+{
+ long PayloadPos;
+
+ if ((Hash == NULL) ||
+ (At->Position >= Hash->nLookupTableItems) ||
+ (At->Position < 0) ||
+ (At->Position > Hash->nLookupTableItems))
+ return 0;
+ *HKLen = Hash->LookupTable[At->Position]->HKLen;
+ *HashKey = Hash->LookupTable[At->Position]->HashKey;
+ PayloadPos = Hash->LookupTable[At->Position]->Position;
+ *Data = Hash->Members[PayloadPos]->Data;
+
+ return 1;
+}
+
+/**
+ * @brief Move HashPos one forward
+ * @param Hash your Hashlist to follow
+ * @param At the position to move forward
+ * \returns whether there is a next item or not.
+ */
+int NextHashPos(HashList *Hash, HashPos *At)
+{
+ if ((Hash == NULL) ||
+ (At->Position >= Hash->nLookupTableItems) ||
+ (At->Position < 0) ||
+ (At->Position > Hash->nLookupTableItems))
+ return 0;
+
+ /* Position is NULL-Based, while Stepwidth is not... */
+ if ((At->Position % abs(At->StepWidth)) == 0)
+ At->Position += At->StepWidth;
+ else
+ At->Position += ((At->Position) % abs(At->StepWidth)) *
+ (At->StepWidth / abs(At->StepWidth));
+ return !((At->Position >= Hash->nLookupTableItems) ||
+ (At->Position < 0) ||
+ (At->Position > Hash->nLookupTableItems));
+}
+
/**
* @brief Get the data located where At points to
* note: you should prefer iterator operations instead of using me.
if ((Hash == NULL) ||
(At < 0) ||
- (At > Hash->nMembersUsed))
+ (At >= Hash->nLookupTableItems))
return 0;
*HKLen = Hash->LookupTable[At]->HKLen;
*HashKey = Hash->LookupTable[At]->HashKey;
return 1;
}
+/**
+ * @brief Get the data located where At points to
+ * note: you should prefer iterator operations instead of using me.
+ * @param Hash your Hashlist peek from
+ * @param HKLen returns Length of Hashkey Returned
+ * @param HashKey returns the Hashkey corrosponding to HashPos
+ * @param Data returns the Data found at HashPos
+ * \returns whether the item was found or not.
+ */
+/*
+long GetHashIDAt(HashList *Hash,long At)
+{
+ if ((Hash == NULL) ||
+ (At < 0) ||
+ (At > Hash->nLookupTableItems))
+ return 0;
+
+ return Hash->LookupTable[At]->Key;
+}
+*/
+
+
/**
* @brief sorting function for sorting the Hash alphabeticaly by their strings
* @param Key1 first item
*/
void SortByHashKey(HashList *Hash, int Order)
{
- if (Hash->nMembersUsed < 2)
+ if (Hash->nLookupTableItems < 2)
return;
- qsort(Hash->LookupTable, Hash->nMembersUsed, sizeof(HashKey*),
+ qsort(Hash->LookupTable, Hash->nLookupTableItems, sizeof(HashKey*),
(Order)?SortByKeys:SortByKeysRev);
Hash->tainted = 1;
}
void SortByHashKeyStr(HashList *Hash)
{
Hash->tainted = 0;
- if (Hash->nMembersUsed < 2)
+ if (Hash->nLookupTableItems < 2)
return;
- qsort(Hash->LookupTable, Hash->nMembersUsed, sizeof(HashKey*), SortByHashKeys);
+ qsort(Hash->LookupTable, Hash->nLookupTableItems, sizeof(HashKey*), SortByHashKeys);
}
*/
void SortByPayload(HashList *Hash, CompareFunc SortBy)
{
- if (Hash->nMembersUsed < 2)
+ if (Hash->nLookupTableItems < 2)
return;
- qsort(Hash->LookupTable, Hash->nMembersUsed, sizeof(HashKey*), SortBy);
+ qsort(Hash->LookupTable, Hash->nLookupTableItems, sizeof(HashKey*), SortBy);
Hash->tainted = 1;
}
*/
-/*
- * Generic function to free a pointer. This can be used as a callback with the
- * hash table, even on systems where free() is defined as a macro or has had other
- * horrible things done to it.
- */
-void generic_free_handler(void *ptr) {
- free(ptr);
-}
-
/*
* Generic function to free a reference.
* since a reference actualy isn't needed to be freed, do nothing.
return (int)hashlittle(key, length, 1);
}
+
+/**
+ * \brief parses an MSet string into a list for later use
+ * \param MSetList List to be read from MSetStr
+ * \param MSetStr String containing the list
+ */
+int ParseMSet(MSet **MSetList, StrBuf *MSetStr)
+{
+ const char *POS = NULL, *SetPOS = NULL;
+ StrBuf *OneSet;
+ HashList *ThisMSet;
+ long StartSet, EndSet;
+ long *pEndSet;
+
+ *MSetList = NULL;
+ if ((MSetStr == NULL) || (StrLength(MSetStr) == 0))
+ return 0;
+
+ OneSet = NewStrBufPlain(NULL, StrLength(MSetStr));
+
+ ThisMSet = NewHash(0, lFlathash);
+
+ *MSetList = (MSet*) ThisMSet;
+
+ /* an MSet is a coma separated value list. */
+ StrBufExtract_NextToken(OneSet, MSetStr, &POS, ',');
+ do {
+ SetPOS = NULL;
+
+ /* One set may consist of two Numbers: Start + optional End */
+ StartSet = StrBufExtractNext_long(OneSet, &SetPOS, ':');
+ EndSet = 0; /* no range is our default. */
+ /* do we have an end (aka range?) */
+ if ((SetPOS != NULL) && (SetPOS != StrBufNOTNULL))
+ {
+ if (*(SetPOS) == '*')
+ EndSet = LONG_MAX; /* ranges with '*' go until infinity */
+ else
+ /* in other cases, get the EndPoint */
+ EndSet = StrBufExtractNext_long(OneSet, &SetPOS, ':');
+ }
+
+ pEndSet = (long*) malloc (sizeof(long));
+ *pEndSet = EndSet;
+
+ Put(ThisMSet, LKEY(StartSet), pEndSet, NULL);
+ /* if we don't have another, we're done. */
+ if (POS == StrBufNOTNULL)
+ break;
+ StrBufExtract_NextToken(OneSet, MSetStr, &POS, ',');
+ } while (1);
+ FreeStrBuf(&OneSet);
+
+ return 1;
+}
+
+/**
+ * \brief checks whether a message is inside a mset
+ * \param MSetList List to search for MsgNo
+ * \param MsgNo number to search in mset
+ */
+int IsInMSetList(MSet *MSetList, long MsgNo)
+{
+ /* basicaly we are a ... */
+ long MemberPosition;
+ HashList *Hash = (HashList*) MSetList;
+ long HashAt;
+ long EndAt;
+ long StartAt;
+
+ if (Hash == NULL)
+ return 0;
+ if (Hash->MemberSize == 0)
+ return 0;
+ /** first, find out were we could fit in... */
+ HashAt = FindInHash(Hash, MsgNo);
+
+ /* we're below the first entry, so not found. */
+ if (HashAt < 0)
+ return 0;
+ /* upper edge? move to last item */
+ if (HashAt >= Hash->nMembersUsed)
+ HashAt = Hash->nMembersUsed - 1;
+ /* Match? then we got it. */
+ else if (Hash->LookupTable[HashAt]->Key == MsgNo)
+ return 1;
+ /* One above possible range start? we need to move to the lower one. */
+ else if ((HashAt > 0) &&
+ (Hash->LookupTable[HashAt]->Key > MsgNo))
+ HashAt -=1;
+
+ /* Fetch the actual data */
+ StartAt = Hash->LookupTable[HashAt]->Key;
+ MemberPosition = Hash->LookupTable[HashAt]->Position;
+ EndAt = *(long*) Hash->Members[MemberPosition]->Data;
+ if ((MsgNo >= StartAt) && (EndAt == LONG_MAX))
+ return 1;
+ /* no range? */
+ if (EndAt == 0)
+ return 0;
+ /* inside of range? */
+ if ((StartAt <= MsgNo) && (EndAt >= MsgNo))
+ return 1;
+ return 0;
+}
+
+
+/**
+ * \brief frees a mset [redirects to @ref DeleteHash
+ * \param FreeMe to be free'd
+ */
+void DeleteMSet(MSet **FreeMe)
+{
+ DeleteHash((HashList**) FreeMe);
+}
projects / citadel.git / blobdiff