#define STRINGSPACE_BLOCK 65535
void
-stringpool_init (Stringpool *ss, const char *strs[])
+stringpool_init(Stringpool *ss, const char *strs[])
{
unsigned totalsize = 0;
unsigned count;
- // count number and total size of predefined strings
+
+ memset(ss, 0, sizeof(*ss));
+ /* count number and total size of predefined strings */
for (count = 0; strs[count]; count++)
totalsize += strlen(strs[count]) + 1;
- // alloc appropriate space
- ss->stringspace = (char *)xmalloc((totalsize + STRINGSPACE_BLOCK) & ~STRINGSPACE_BLOCK);
- ss->strings = (Offset *)xmalloc(((count + STRING_BLOCK) & ~STRING_BLOCK) * sizeof(Offset));
+ /* alloc appropriate space */
+ ss->stringspace = solv_extend_resize(0, totalsize, 1, STRINGSPACE_BLOCK);
+ ss->strings = solv_extend_resize(0, count, sizeof(Offset), STRING_BLOCK);
- // now copy predefined strings into allocated space
+ /* now copy predefined strings into allocated space */
ss->sstrings = 0;
for (count = 0; strs[count]; count++)
{
ss->nstrings = count;
}
+void
+stringpool_free(Stringpool *ss)
+{
+ solv_free(ss->strings);
+ solv_free(ss->stringspace);
+ solv_free(ss->stringhashtbl);
+}
+
+void
+stringpool_freehash(Stringpool *ss)
+{
+ ss->stringhashtbl = solv_free(ss->stringhashtbl);
+ ss->stringhashmask = 0;
+}
+
+void
+stringpool_init_empty(Stringpool *ss)
+{
+ const char *emptystrs[] = {
+ "<NULL>",
+ "",
+ 0,
+ };
+ stringpool_init(ss, emptystrs);
+}
+
+void
+stringpool_clone(Stringpool *ss, Stringpool *from)
+{
+ memset(ss, 0, sizeof(*ss));
+ ss->strings = solv_extend_resize(0, from->nstrings, sizeof(Offset), STRING_BLOCK);
+ memcpy(ss->strings, from->strings, from->nstrings * sizeof(Offset));
+ ss->stringspace = solv_extend_resize(0, from->sstrings, 1, STRINGSPACE_BLOCK);
+ memcpy(ss->stringspace, from->stringspace, from->sstrings);
+ ss->nstrings = from->nstrings;
+ ss->sstrings = from->sstrings;
+}
+
Id
-stringpool_str2id (Stringpool *ss, const char *str, int create)
+stringpool_strn2id(Stringpool *ss, const char *str, unsigned int len, int create)
{
- Hashval h;
- unsigned int hh;
- Hashmask hashmask;
- int i, space_needed;
+ Hashval h, hh, hashmask, oldhashmask;
+ int i;
Id id;
Hashtable hashtbl;
- // check string
if (!str)
return STRID_NULL;
- if (!*str)
+ if (!len)
return STRID_EMPTY;
- hashmask = ss->stringhashmask;
+ hashmask = oldhashmask = ss->stringhashmask;
hashtbl = ss->stringhashtbl;
- // expand hashtable if needed
- //
- //
+ /* expand hashtable if needed */
if (ss->nstrings * 2 > hashmask)
{
- xfree(hashtbl);
+ solv_free(hashtbl);
- // realloc hash table
+ /* realloc hash table */
ss->stringhashmask = hashmask = mkmask(ss->nstrings + STRING_BLOCK);
- ss->stringhashtbl = hashtbl = (Hashtable)xcalloc(hashmask + 1, sizeof(Id));
+ ss->stringhashtbl = hashtbl = (Hashtable)solv_calloc(hashmask + 1, sizeof(Id));
- // rehash all strings into new hashtable
+ /* rehash all strings into new hashtable */
for (i = 1; i < ss->nstrings; i++)
{
h = strhash(ss->stringspace + ss->strings[i]) & hashmask;
hh = HASHCHAIN_START;
- while (hashtbl[h] != 0) // follow overflow chain
+ while (hashtbl[h] != 0)
h = HASHCHAIN_NEXT(h, hh, hashmask);
hashtbl[h] = i;
}
}
- // compute hash and check for match
-
- h = strhash(str) & hashmask;
+ /* compute hash and check for match */
+ h = strnhash(str, len) & hashmask;
hh = HASHCHAIN_START;
- while ((id = hashtbl[h]) != 0) // follow hash overflow chain
+ while ((id = hashtbl[h]) != 0)
{
- // break if string already hashed
- if(!strcmp(ss->stringspace + ss->strings[id], str))
+ if(!memcmp(ss->stringspace + ss->strings[id], str, len)
+ && ss->stringspace[ss->strings[id] + len] == 0)
break;
h = HASHCHAIN_NEXT(h, hh, hashmask);
}
- if (id || !create) // exit here if string found
+ if (id || !create) /* exit here if string found */
return id;
- // generate next id and save in table
+ /* this should be a test for a flag that tells us if the
+ * correct blocking is used, but adding a flag would break
+ * the ABI. So we use the existance of the hash area as
+ * indication instead */
+ if (!oldhashmask)
+ {
+ ss->stringspace = solv_extend_resize(ss->stringspace, ss->sstrings + len + 1, 1, STRINGSPACE_BLOCK);
+ ss->strings = solv_extend_resize(ss->strings, ss->nstrings + 1, sizeof(Offset), STRING_BLOCK);
+ }
+
+ /* generate next id and save in table */
id = ss->nstrings++;
hashtbl[h] = id;
- //
- if ((id & STRING_BLOCK) == 0)
- ss->strings = xrealloc(ss->strings, ((ss->nstrings + STRING_BLOCK) & ~STRING_BLOCK) * sizeof(Hashval));
- // 'pointer' into stringspace is Offset of next free pos: sstrings
- ss->strings[id] = ss->sstrings;
-
- space_needed = strlen(str) + 1;
-
- // resize string buffer if needed
- if (((ss->sstrings + space_needed - 1) | STRINGSPACE_BLOCK) != ((ss->sstrings - 1) | STRINGSPACE_BLOCK))
- ss->stringspace = xrealloc(ss->stringspace, (ss->sstrings + space_needed + STRINGSPACE_BLOCK) & ~STRINGSPACE_BLOCK);
- // copy new string into buffer
- memcpy(ss->stringspace + ss->sstrings, str, space_needed);
- // next free pos is behind new string
- ss->sstrings += space_needed;
+ ss->strings = solv_extend(ss->strings, id, 1, sizeof(Offset), STRING_BLOCK);
+ ss->strings[id] = ss->sstrings; /* we will append to the end */
+ /* append string to stringspace */
+ ss->stringspace = solv_extend(ss->stringspace, ss->sstrings, len + 1, 1, STRINGSPACE_BLOCK);
+ memcpy(ss->stringspace + ss->sstrings, str, len);
+ ss->stringspace[ss->sstrings + len] = 0;
+ ss->sstrings += len + 1;
return id;
}
+Id
+stringpool_str2id(Stringpool *ss, const char *str, int create)
+{
+ if (!str)
+ return STRID_NULL;
+ if (!*str)
+ return STRID_EMPTY;
+ return stringpool_strn2id(ss, str, (unsigned int)strlen(str), create);
+}
+
void
-stringpool_shrink (Stringpool *ss)
+stringpool_shrink(Stringpool *ss)
{
- ss->stringspace = (char *)xrealloc(ss->stringspace, (ss->sstrings + STRINGSPACE_BLOCK) & ~STRINGSPACE_BLOCK);
- ss->strings = (Offset *)xrealloc(ss->strings, ((ss->nstrings + STRING_BLOCK) & ~STRING_BLOCK) * sizeof(Offset));
+ ss->stringspace = solv_extend_resize(ss->stringspace, ss->sstrings, 1, STRINGSPACE_BLOCK);
+ ss->strings = solv_extend_resize(ss->strings, ss->nstrings, sizeof(Offset), STRING_BLOCK);
}
projects / platform / upstream / libsolv.git / blobdiff