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|
/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* $URL$
* $Id$
*
*/
// Main vocabulary support functions and word lookup
#include "sci/parser/vocabulary.h"
#include "sci/resource.h"
#include "sci/engine/state.h"
#include "sci/engine/kernel.h"
#include "sci/console.h"
namespace Sci {
Vocabulary::Vocabulary(ResourceManager *resMan, bool foreign) : _resMan(resMan), _foreign(foreign) {
_parserRules = NULL;
memset(_parserNodes, 0, sizeof(_parserNodes));
// Mark parse tree as unused
_parserNodes[0].type = kParseTreeLeafNode;
_parserNodes[0].value = 0;
_parserNodes[0].right = 0;
_synonyms.clear(); // No synonyms
debug(2, "Initializing vocabulary");
if (_resMan->testResource(ResourceId(kResourceTypeVocab, VOCAB_RESOURCE_SCI0_MAIN_VOCAB))) {
_vocabVersion = kVocabularySCI0;
_resourceIdWords = VOCAB_RESOURCE_SCI0_MAIN_VOCAB;
_resourceIdSuffixes = VOCAB_RESOURCE_SCI0_SUFFIX_VOCAB;
_resourceIdBranches = VOCAB_RESOURCE_SCI0_PARSE_TREE_BRANCHES;
} else {
_vocabVersion = kVocabularySCI1;
_resourceIdWords = VOCAB_RESOURCE_SCI1_MAIN_VOCAB;
_resourceIdSuffixes = VOCAB_RESOURCE_SCI1_SUFFIX_VOCAB;
_resourceIdBranches = VOCAB_RESOURCE_SCI1_PARSE_TREE_BRANCHES;
}
if (_foreign) {
_resourceIdWords += 10;
_resourceIdSuffixes += 10;
_resourceIdBranches += 10;
}
if (getSciVersion() <= SCI_VERSION_1_EGA && loadParserWords()) {
loadSuffixes();
if (loadBranches())
// Now build a GNF grammar out of this
_parserRules = buildGNF();
} else {
debug(2, "Assuming that this game does not use a parser.");
_parserRules = NULL;
}
parser_base = NULL_REG;
parser_event = NULL_REG;
parserIsValid = false;
}
Vocabulary::~Vocabulary() {
freeRuleList(_parserRules);
freeSuffixes();
}
void Vocabulary::reset() {
parserIsValid = false; // Invalidate parser
parser_event = NULL_REG; // Invalidate parser event
parser_base = make_reg(g_sci->getEngineState()->_segMan->getSysStringsSegment(), SYS_STRING_PARSER_BASE);
}
bool Vocabulary::loadParserWords() {
char currentWord[VOCAB_MAX_WORDLENGTH] = "";
int currentWordPos = 0;
// First try to load the SCI0 vocab resource.
Resource *resource = _resMan->findResource(ResourceId(kResourceTypeVocab, _resourceIdWords), 0);
if (!resource) {
warning("Could not find a main vocabulary");
return false; // NOT critical: SCI1 games and some demos don't have one!
}
VocabularyVersions resourceType = _vocabVersion;
if (resourceType == kVocabularySCI0) {
if (resource->size < 26 * 2) {
warning("Invalid main vocabulary encountered: Much too small");
return false;
}
// Check the alphabet-offset table for any content
int alphabetNr;
for (alphabetNr = 0; alphabetNr < 26; alphabetNr++) {
if (READ_LE_UINT16(resource->data + alphabetNr * 2))
break;
}
// If all of them were empty, we are definitely seeing SCI01 vocab in disguise (e.g. pq2 japanese)
if (alphabetNr == 26) {
warning("SCI0: Found SCI01 vocabulary in disguise");
resourceType = kVocabularySCI1;
}
}
unsigned int seeker;
if (resourceType == kVocabularySCI1)
seeker = 255 * 2; // vocab.900 starts with 255 16-bit pointers which we don't use
else
seeker = 26 * 2; // vocab.000 starts with 26 16-bit pointers which we don't use
if (resource->size < seeker) {
warning("Invalid main vocabulary encountered: Too small");
return false;
// Now this ought to be critical, but it'll just cause parse() and said() not to work
}
_parserWords.clear();
while (seeker < resource->size) {
byte c;
currentWordPos = resource->data[seeker++]; // Parts of previous words may be re-used
if (resourceType == kVocabularySCI1) {
c = 1;
while (seeker < resource->size && currentWordPos < 255 && c) {
c = resource->data[seeker++];
currentWord[currentWordPos++] = c;
}
if (seeker == resource->size) {
warning("SCI1: Vocabulary not usable, disabling");
_parserWords.clear();
return false;
}
} else {
do {
c = resource->data[seeker++];
currentWord[currentWordPos++] = c & 0x7f; // 0x80 is used to terminate the string
} while (c < 0x80);
}
currentWord[currentWordPos] = 0;
// Now decode class and group:
c = resource->data[seeker + 1];
ResultWord newWord;
newWord._class = ((resource->data[seeker]) << 4) | ((c & 0xf0) >> 4);
newWord._group = (resource->data[seeker + 2]) | ((c & 0x0f) << 8);
// SCI01 was the first version to support multiple class/group pairs
// per word, so we clear the list in earlier versions
// in earlier versions.
if (getSciVersion() < SCI_VERSION_01)
_parserWords[currentWord].clear();
// Add this to the list of possible class,group pairs for this word
_parserWords[currentWord].push_back(newWord);
seeker += 3;
}
return true;
}
const char *Vocabulary::getAnyWordFromGroup(int group) {
if (group == VOCAB_MAGIC_NUMBER_GROUP)
return "{number}";
if (group == VOCAB_MAGIC_NOTHING_GROUP)
return "{nothing}";
for (WordMap::const_iterator i = _parserWords.begin(); i != _parserWords.end(); ++i) {
for (ResultWordList::const_iterator j = i->_value.begin(); j != i->_value.end(); ++j)
if (j->_group == group)
return i->_key.c_str();
}
return "{invalid}";
}
bool Vocabulary::loadSuffixes() {
// Determine if we can find a SCI1 suffix vocabulary first
Resource* resource = _resMan->findResource(ResourceId(kResourceTypeVocab, _resourceIdSuffixes), 1);
if (!resource)
return false; // No vocabulary found
unsigned int seeker = 1;
while ((seeker < resource->size - 1) && (resource->data[seeker + 1] != 0xff)) {
suffix_t suffix;
suffix.alt_suffix = (const char *)resource->data + seeker;
suffix.alt_suffix_length = strlen(suffix.alt_suffix);
seeker += suffix.alt_suffix_length + 1; // Hit end of string
suffix.result_class = (int16)READ_BE_UINT16(resource->data + seeker);
seeker += 2;
// Beginning of next string - skip leading '*'
seeker++;
suffix.word_suffix = (const char *)resource->data + seeker;
suffix.word_suffix_length = strlen(suffix.word_suffix);
seeker += suffix.word_suffix_length + 1;
suffix.class_mask = (int16)READ_BE_UINT16(resource->data + seeker);
seeker += 3; // Next entry
_parserSuffixes.push_back(suffix);
}
return true;
}
void Vocabulary::freeSuffixes() {
Resource* resource = _resMan->findResource(ResourceId(kResourceTypeVocab, _resourceIdSuffixes), 0);
if (resource)
_resMan->unlockResource(resource);
_parserSuffixes.clear();
}
bool Vocabulary::loadBranches() {
Resource *resource = _resMan->findResource(ResourceId(kResourceTypeVocab, _resourceIdBranches), 0);
_parserBranches.clear();
if (!resource)
return false; // No parser tree data found
int branches_nr = resource->size / 20;
if (branches_nr == 0) {
warning("Parser tree data is empty");
return false;
}
_parserBranches.resize(branches_nr);
for (int i = 0; i < branches_nr; i++) {
byte *base = resource->data + i * 20;
_parserBranches[i].id = (int16)READ_LE_UINT16(base);
for (int k = 0; k < 9; k++)
_parserBranches[i].data[k] = READ_LE_UINT16(base + 2 + 2 * k);
_parserBranches[i].data[9] = 0; // Always terminate
}
if (!_parserBranches[branches_nr - 1].id) // branch lists may be terminated by empty rules
_parserBranches.remove_at(branches_nr - 1);
return true;
}
// we assume that *word points to an already lowercased word
void Vocabulary::lookupWord(ResultWordList& retval, const char *word, int word_len) {
retval.clear();
Common::String tempword(word, word_len);
// Remove all dashes from tempword
for (uint i = 0; i < tempword.size(); ) {
if (tempword[i] == '-')
tempword.deleteChar(i);
else
++i;
}
// Look it up:
WordMap::iterator dict_words = _parserWords.find(tempword);
// Match found? Return it!
if (dict_words != _parserWords.end()) {
retval = dict_words->_value;
// SCI01 was the first version to support
// multiple matches, so no need to look further
// in earlier versions.
if (getSciVersion() < SCI_VERSION_01)
return;
}
// Now try all suffixes
for (SuffixList::const_iterator suffix = _parserSuffixes.begin(); suffix != _parserSuffixes.end(); ++suffix) {
if (suffix->alt_suffix_length <= word_len) {
int suff_index = word_len - suffix->alt_suffix_length;
// Offset of the start of the suffix
if (strncmp(suffix->alt_suffix, word + suff_index, suffix->alt_suffix_length) == 0) { // Suffix matched!
// Terminate word at suffix start position...:
Common::String tempword2(word, MIN(word_len, suff_index));
// ...and append "correct" suffix
tempword2 += Common::String(suffix->word_suffix, suffix->word_suffix_length);
dict_words = _parserWords.find(tempword2);
if (dict_words != _parserWords.end()) {
for (ResultWordList::const_iterator j = dict_words->_value.begin(); j != dict_words->_value.end(); ++j) {
if (j->_class & suffix->class_mask) { // Found it?
// Use suffix class
ResultWord tmp = *j;
tmp._class = suffix->result_class;
retval.push_back(tmp);
// SCI01 was the first version to support
// multiple matches, so no need to look further
// in earlier versions.
if (getSciVersion() < SCI_VERSION_01)
return;
}
}
}
}
}
}
if (!retval.empty())
return;
// No match so far? Check if it's a number.
char *tester;
if ((strtol(tempword.c_str(), &tester, 10) >= 0) && (*tester == '\0')) { // Do we have a complete number here?
ResultWord tmp = { VOCAB_CLASS_NUMBER, VOCAB_MAGIC_NUMBER_GROUP };
retval.push_back(tmp);
}
}
void Vocabulary::debugDecipherSaidBlock(const byte *addr) {
bool first = true;
uint16 nextItem;
do {
nextItem = *addr++;
if (nextItem != 0xff) {
if ((!first) && (nextItem != 0xf0))
printf(" ");
first = false;
if (nextItem < 0xf0) {
nextItem = nextItem << 8 | *addr++;
printf("%s{%03x}", getAnyWordFromGroup(nextItem), nextItem);
nextItem = 0; // Make sure that group 0xff doesn't abort
} else switch (nextItem) {
case 0xf0:
printf(",");
break;
case 0xf1:
printf("&");
break;
case 0xf2:
printf("/");
break;
case 0xf3:
printf("(");
break;
case 0xf4:
printf(")");
break;
case 0xf5:
printf("[");
break;
case 0xf6:
printf("]");
break;
case 0xf7:
printf("#");
break;
case 0xf8:
printf("<");
break;
case 0xf9:
printf(">");
break;
case 0xff:
break;
}
}
} while (nextItem != 0xff);
}
static const byte lowerCaseMap[256] = {
0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, // 0x00
0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, // 0x10
0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, // 0x20
0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f, // 0x30
0x40, 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', // 0x40
'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z', 0x5b, 0x5c, 0x5d, 0x5e, 0x5f, // 0x50
0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, // 0x60
0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, 0x7a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f, // 0x70
0x87, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x8d, 0x84, 0x86, // 0x80
//^^ ^^^^ ^^^^
0x82, 0x91, 0x91, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98, 0x94, 0x81, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f, // 0x90
//^^ ^^^^ ^^^^ ^^^^
0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa4, 0xa6, 0xa7, 0xa8, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf, // 0xa0
// ^^^^
0xb0, 0xb1, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7, 0xb8, 0xb9, 0xba, 0xbb, 0xbc, 0xbd, 0xbe, 0xbf, // 0xb0
0xc0, 0xc1, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xcb, 0xcc, 0xcd, 0xce, 0xcf, // 0xc0
0xd0, 0xd1, 0xd2, 0xd3, 0xd4, 0xd5, 0xd6, 0xd7, 0xd8, 0xd9, 0xda, 0xdb, 0xdc, 0xdd, 0xde, 0xdf, // 0xd0
0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef, // 0xe0
0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xff // 0xf0
};
bool Vocabulary::tokenizeString(ResultWordListList &retval, const char *sentence, char **error) {
char currentWord[VOCAB_MAX_WORDLENGTH] = "";
int pos_in_sentence = 0;
unsigned char c;
int wordLen = 0;
*error = NULL;
do {
c = sentence[pos_in_sentence++];
if (isalnum(c) || (c == '-' && wordLen) || (c >= 0x80)) {
currentWord[wordLen] = lowerCaseMap[c];
++wordLen;
}
// Continue on this word */
// Words may contain a '-', but may not
// start with one.
else {
if (wordLen) { // Finished a word?
ResultWordList lookup_result;
// Look it up
lookupWord(lookup_result, currentWord, wordLen);
if (lookup_result.empty()) { // Not found?
*error = (char *)calloc(wordLen + 1, 1);
strncpy(*error, currentWord, wordLen); // Set the offending word
retval.clear();
return false; // And return with error
}
// Copy into list
retval.push_back(lookup_result);
}
wordLen = 0;
}
} while (c); // Until terminator is hit
return true;
}
void Vocabulary::printSuffixes() const {
char word_buf[VOCAB_MAX_WORDLENGTH], alt_buf[VOCAB_MAX_WORDLENGTH];
Console *con = g_sci->getSciDebugger();
int i = 0;
for (SuffixList::const_iterator suf = _parserSuffixes.begin(); suf != _parserSuffixes.end(); ++suf) {
strncpy(word_buf, suf->word_suffix, suf->word_suffix_length);
word_buf[suf->word_suffix_length] = 0;
strncpy(alt_buf, suf->alt_suffix, suf->alt_suffix_length);
alt_buf[suf->alt_suffix_length] = 0;
con->DebugPrintf("%4d: (%03x) -%12s => -%12s (%03x)\n", i, suf->class_mask, word_buf, alt_buf, suf->result_class);
++i;
}
}
void Vocabulary::printParserWords() const {
Console *con = g_sci->getSciDebugger();
int n = 0;
for (WordMap::iterator i = _parserWords.begin(); i != _parserWords.end(); ++i) {
for (ResultWordList::iterator j = i->_value.begin(); j != i->_value.end(); ++j) {
con->DebugPrintf("%4d: %03x [%03x] %20s |", n, j->_class, j->_group, i->_key.c_str());
if (n % 3 == 0)
con->DebugPrintf("\n");
n++;
}
}
con->DebugPrintf("\n");
}
void _vocab_recursive_ptree_dump(ParseTreeNode *tree, int blanks) {
assert(tree);
ParseTreeNode* lbranch = tree->left;
ParseTreeNode* rbranch = tree->right;
int i;
if (tree->type == kParseTreeLeafNode) {
printf("vocab_dump_parse_tree: Error: consp is nil\n");
return;
}
if (lbranch) {
if (lbranch->type == kParseTreeBranchNode) {
printf("\n");
for (i = 0; i < blanks; i++)
printf(" ");
printf("(");
_vocab_recursive_ptree_dump(lbranch, blanks + 1);
printf(")\n");
for (i = 0; i < blanks; i++)
printf(" ");
} else
printf("%x", lbranch->value);
printf(" ");
}/* else printf ("nil");*/
if (rbranch) {
if (rbranch->type == kParseTreeBranchNode)
_vocab_recursive_ptree_dump(rbranch, blanks);
else {
printf("%x", rbranch->value);
while (rbranch->right) {
rbranch = rbranch->right;
printf("/%x", rbranch->value);
}
}
}/* else printf("nil");*/
}
void vocab_dump_parse_tree(const char *tree_name, ParseTreeNode *nodes) {
printf("(setq %s \n'(", tree_name);
_vocab_recursive_ptree_dump(nodes, 1);
printf("))\n");
}
void Vocabulary::dumpParseTree() {
printf("(setq parse-tree \n'(");
_vocab_recursive_ptree_dump(_parserNodes, 1);
printf("))\n");
}
void Vocabulary::synonymizeTokens(ResultWordListList &words) {
if (_synonyms.empty())
return; // No synonyms: Nothing to check
for (ResultWordListList::iterator i = words.begin(); i != words.end(); ++i)
for (ResultWordList::iterator j = i->begin(); j != i->end(); ++j)
for (SynonymList::const_iterator sync = _synonyms.begin(); sync != _synonyms.end(); ++sync)
if (j->_group == sync->replaceant)
j->_group = sync->replacement;
}
void Vocabulary::printParserNodes(int num) {
Console *con = g_sci->getSciDebugger();
for (int i = 0; i < num; i++) {
con->DebugPrintf(" Node %03x: ", i);
if (_parserNodes[i].type == kParseTreeLeafNode)
con->DebugPrintf("Leaf: %04x\n", _parserNodes[i].value);
else
con->DebugPrintf("Branch: ->%04x, ->%04x\n", _parserNodes[i].left,
_parserNodes[i].right);
}
}
int Vocabulary::parseNodes(int *i, int *pos, int type, int nr, int argc, const char **argv) {
int nextToken = 0, nextValue = 0, newPos = 0, oldPos = 0;
Console *con = g_sci->getSciDebugger();
if (type == kParseNil)
return 0;
if (type == kParseNumber) {
_parserNodes[*pos += 1].type = kParseTreeLeafNode;
_parserNodes[*pos].value = nr;
_parserNodes[*pos].right = 0;
return *pos;
}
if (type == kParseEndOfInput) {
con->DebugPrintf("Unbalanced parentheses\n");
return -1;
}
if (type == kParseClosingParenthesis) {
con->DebugPrintf("Syntax error at token %d\n", *i);
return -1;
}
_parserNodes[oldPos = ++(*pos)].type = kParseTreeBranchNode;
for (int j = 0; j <= 1; j++) {
if (*i == argc) {
nextToken = kParseEndOfInput;
} else {
const char *token = argv[(*i)++];
if (!strcmp(token, "(")) {
nextToken = kParseOpeningParenthesis;
} else if (!strcmp(token, ")")) {
nextToken = kParseClosingParenthesis;
} else if (!strcmp(token, "nil")) {
nextToken = kParseNil;
} else {
nextValue = strtol(token, NULL, 0);
nextToken = kParseNumber;
}
}
newPos = parseNodes(i, pos, nextToken, nextValue, argc, argv);
if (j == 0)
_parserNodes[oldPos].left = &_parserNodes[newPos];
else
_parserNodes[oldPos].right = &_parserNodes[newPos];
if (newPos == -1)
return -1;
}
const char *token = argv[(*i)++];
if (strcmp(token, ")"))
con->DebugPrintf("Expected ')' at token %d\n", *i);
return oldPos;
}
} // End of namespace Sci
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