ficlWord *ficlSystemLookupLocal(ficlSystem *system, ficlString name)
{
ficlWord *word = NULL;
ficlDictionary *dictionary = system->dictionary;
ficlHash *hash = ficlSystemGetLocals(system)->forthWordlist;
int i;
ficlUnsigned16 hashCode = ficlHashCode(name);
FICL_SYSTEM_ASSERT(system, hash);
FICL_SYSTEM_ASSERT(system, dictionary);
ficlDictionaryLock(dictionary, FICL_TRUE);
/*
** check the locals dictionary first...
*/
word = ficlHashLookup(hash, name, hashCode);
/*
** If no joy, (!word) ------------------------------v
** iterate over the search list in the main dictionary
*/
for (i = (int)dictionary->wordlistCount - 1; (i >= 0) && (!word); --i)
{
hash = dictionary->wordlists[i];
word = ficlHashLookup(hash, name, hashCode);
}
ficlDictionaryLock(dictionary, FICL_FALSE);
return word;
}
/*
* d i c t A p p e n d W o r d
* Create a new word in the dictionary with the specified
* ficlString, code, and flags. Does not require a NULL-terminated
* name.
*/
ficlWord *
ficlDictionaryAppendWord(ficlDictionary *dictionary, ficlString name,
ficlPrimitive code, ficlUnsigned8 flags)
{
ficlUnsigned8 length = (ficlUnsigned8)FICL_STRING_GET_LENGTH(name);
char *nameCopy;
ficlWord *word;
ficlDictionaryLock(dictionary, FICL_TRUE);
/*
* NOTE: ficlDictionaryAppendString advances "here" as a side-effect.
* It must execute before word is initialized.
*/
nameCopy = ficlDictionaryAppendString(dictionary, name);
word = (ficlWord *)dictionary->here;
dictionary->smudge = word;
word->hash = ficlHashCode(name);
word->code = code;
word->semiParen = ficlInstructionSemiParen;
word->flags = (ficlUnsigned8)(flags | FICL_WORD_SMUDGED);
word->length = length;
word->name = nameCopy;
/*
* Point "here" to first ficlCell of new word's param area...
*/
dictionary->here = word->param;
if (!(flags & FICL_WORD_SMUDGED))
ficlDictionaryUnsmudge(dictionary);
ficlDictionaryLock(dictionary, FICL_FALSE);
return (word);
}
/*
* d i c t L o o k u p
* Find the ficlWord that matches the given name and length.
* If found, returns the word's address. Otherwise returns NULL.
* Uses the search order list to search multiple wordlists.
*/
ficlWord *
ficlDictionaryLookup(ficlDictionary *dictionary, ficlString name)
{
ficlWord *word = NULL;
ficlHash *hash;
int i;
ficlUnsigned16 hashCode = ficlHashCode(name);
FICL_DICTIONARY_ASSERT(dictionary, dictionary != NULL);
ficlDictionaryLock(dictionary, FICL_TRUE);
for (i = (int)dictionary->wordlistCount - 1; (i >= 0) && (!word); --i) {
hash = dictionary->wordlists[i];
word = ficlHashLookup(hash, name, hashCode);
}
ficlDictionaryLock(dictionary, FICL_FALSE);
return (word);
}
/*
* s e a r c h - w o r d l i s t
* SEARCH ( c-addr u wid -- 0 | xt 1 | xt -1 )
* Find the definition identified by the string c-addr u in the word list
* identified by wid. If the definition is not found, return zero. If the
* definition is found, return its execution token xt and one (1) if the
* definition is immediate, minus-one (-1) otherwise.
*/
static void
ficlPrimitiveSearchWordlist(ficlVm *vm)
{
ficlString name;
ficlUnsigned16 hashCode;
ficlWord *word;
ficlHash *hash = ficlStackPopPointer(vm->dataStack);
name.length = (ficlUnsigned8)ficlStackPopUnsigned(vm->dataStack);
name.text = ficlStackPopPointer(vm->dataStack);
hashCode = ficlHashCode(name);
ficlDictionaryLock(ficlVmGetDictionary(vm), FICL_TRUE);
word = ficlHashLookup(hash, name, hashCode);
ficlDictionaryLock(ficlVmGetDictionary(vm), FICL_FALSE);
if (word) {
ficlStackPushPointer(vm->dataStack, word);
ficlStackPushInteger(vm->dataStack,
(ficlWordIsImmediate(word) ? 1 : -1));
} else {
ficlStackPushUnsigned(vm->dataStack, 0);
}
}
FICL_PLATFORM_EXTERN ficlUnsigned16 hashHashCode (ficlString string) { return ficlHashCode(string); }
