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Diffstat (limited to 'engines')
-rw-r--r--engines/sci/engine/grammar.cpp190
1 files changed, 69 insertions, 121 deletions
diff --git a/engines/sci/engine/grammar.cpp b/engines/sci/engine/grammar.cpp
index 184caa506c..2429de00ae 100644
--- a/engines/sci/engine/grammar.cpp
+++ b/engines/sci/engine/grammar.cpp
@@ -42,8 +42,7 @@
int _allocd_rules = 0;
-static void
-vocab_print_rule(parse_rule_t *rule) {
+static void vocab_print_rule(parse_rule_t *rule) {
int i;
int wspace = 0;
@@ -61,14 +60,12 @@ vocab_print_rule(parse_rule_t *rule) {
uint token = rule->data[i];
if (token == TOKEN_OPAREN) {
-
if (i == rule->first_special)
sciprintf("_");
sciprintf("(");
wspace = 0;
} else if (token == TOKEN_CPAREN) {
-
if (i == rule->first_special)
sciprintf("_");
@@ -97,16 +94,13 @@ vocab_print_rule(parse_rule_t *rule) {
sciprintf(" [%d specials]", rule->specials_nr);
}
-
-static void
-_vfree(parse_rule_t *rule) {
+static void _vfree(parse_rule_t *rule) {
free(rule);
--_allocd_rules;
rule = NULL;
}
-static parse_rule_t *
-_vdup(parse_rule_t *a) {
+static parse_rule_t *_vdup(parse_rule_t *a) {
parse_rule_t *rule = (parse_rule_t*)sci_malloc(sizeof(int) * (a->length + 4));
rule->id = a->id;
@@ -120,17 +114,14 @@ _vdup(parse_rule_t *a) {
return rule;
}
-static parse_rule_t *
-_vinsert(parse_rule_t *turkey, parse_rule_t *stuffing) {
+static parse_rule_t *_vinsert(parse_rule_t *turkey, parse_rule_t *stuffing) {
int firstnt = turkey->first_special;
parse_rule_t *rule;
- while ((firstnt < turkey->length)
- && (turkey->data[firstnt] & TOKEN_NON_NT))
+ while ((firstnt < turkey->length) && (turkey->data[firstnt] & TOKEN_NON_NT))
firstnt++;
- if ((firstnt == turkey->length)
- || (turkey->data[firstnt] != stuffing->id))
+ if ((firstnt == turkey->length) || (turkey->data[firstnt] != stuffing->id))
return NULL;
rule = (parse_rule_t*)sci_malloc(sizeof(int) * (turkey->length - 1 + stuffing->length + 4));
@@ -142,16 +133,15 @@ _vinsert(parse_rule_t *turkey, parse_rule_t *stuffing) {
if (firstnt > 0)
memcpy(rule->data, turkey->data, sizeof(int) * firstnt);
+
memcpy(&(rule->data[firstnt]), stuffing->data, sizeof(int) * stuffing->length);
if (firstnt < turkey->length - 1)
- memcpy(&(rule->data[firstnt + stuffing->length]), &(turkey->data[firstnt + 1]),
- sizeof(int) * (turkey->length - firstnt - 1));
+ memcpy(&(rule->data[firstnt + stuffing->length]), &(turkey->data[firstnt + 1]), sizeof(int) * (turkey->length - firstnt - 1));
return rule;
}
-static parse_rule_t *
-_vbuild_rule(parse_tree_branch_t *branch) {
+static parse_rule_t *_vbuild_rule(parse_tree_branch_t *branch) {
parse_rule_t *rule;
int tokens = 0, tokenpos = 0, i;
@@ -159,13 +149,12 @@ _vbuild_rule(parse_tree_branch_t *branch) {
int type = branch->data[tokenpos];
tokenpos += 2;
- if ((type == VOCAB_TREE_NODE_COMPARE_TYPE)
- || (type == VOCAB_TREE_NODE_COMPARE_GROUP)
- || (type == VOCAB_TREE_NODE_FORCE_STORAGE))
+ if ((type == VOCAB_TREE_NODE_COMPARE_TYPE) || (type == VOCAB_TREE_NODE_COMPARE_GROUP) || (type == VOCAB_TREE_NODE_FORCE_STORAGE))
++tokens;
else if (type > VOCAB_TREE_NODE_LAST_WORD_STORAGE)
tokens += 5;
- else return NULL; /* invalid */
+ else
+ return NULL; // invalid
}
rule = (parse_rule_t*)sci_malloc(sizeof(int) * (4 + tokens));
@@ -187,7 +176,7 @@ _vbuild_rule(parse_tree_branch_t *branch) {
rule->data[tokens++] = value | TOKEN_TERMINAL_GROUP;
else if (type == VOCAB_TREE_NODE_FORCE_STORAGE)
rule->data[tokens++] = value | TOKEN_STUFFING_WORD;
- else { /* normal inductive rule */
+ else { // normal inductive rule
rule->data[tokens++] = TOKEN_OPAREN;
rule->data[tokens++] = type | TOKEN_STUFFING_WORD;
rule->data[tokens++] = value | TOKEN_STUFFING_WORD;
@@ -195,7 +184,7 @@ _vbuild_rule(parse_tree_branch_t *branch) {
if (i == 0)
rule->first_special = tokens;
- rule->data[tokens++] = value; /* The non-terminal */
+ rule->data[tokens++] = value; // The non-terminal
rule->data[tokens++] = TOKEN_CPAREN;
}
}
@@ -203,9 +192,7 @@ _vbuild_rule(parse_tree_branch_t *branch) {
return rule;
}
-
-static parse_rule_t *
-_vsatisfy_rule(parse_rule_t *rule, result_word_t *input) {
+static parse_rule_t *_vsatisfy_rule(parse_rule_t *rule, result_word_t *input) {
int dep;
if (!rule->specials_nr)
@@ -213,11 +200,8 @@ _vsatisfy_rule(parse_rule_t *rule, result_word_t *input) {
dep = rule->data[rule->first_special];
- if (((dep & TOKEN_TERMINAL_CLASS)
- && ((dep & 0xffff) & input->w_class))
- ||
- ((dep & TOKEN_TERMINAL_GROUP)
- && ((dep & 0xffff) & input->group))) {
+ if (((dep & TOKEN_TERMINAL_CLASS) && ((dep & 0xffff) & input->w_class)) ||
+ ((dep & TOKEN_TERMINAL_GROUP) && ((dep & 0xffff) & input->group))) {
parse_rule_t *retval = (parse_rule_t*)sci_malloc(sizeof(int) * (4 + rule->length));
++_allocd_rules;
retval->id = rule->id;
@@ -227,12 +211,10 @@ _vsatisfy_rule(parse_rule_t *rule, result_word_t *input) {
retval->data[rule->first_special] = TOKEN_STUFFING_WORD | input->group;
retval->first_special = 0;
- if (retval->specials_nr) { /* find first special, if it exists */
+ if (retval->specials_nr) { // find first special, if it exists
int tmp, i = rule->first_special;
- while ((i < rule->length)
- && ((tmp = retval->data[i]) & TOKEN_NON_NT)
- && !(tmp & TOKEN_TERMINAL))
+ while ((i < rule->length)&& ((tmp = retval->data[i]) & TOKEN_NON_NT) && !(tmp & TOKEN_TERMINAL))
++i;
if (i < rule->length)
@@ -240,32 +222,26 @@ _vsatisfy_rule(parse_rule_t *rule, result_word_t *input) {
}
return retval;
- } else return NULL;
+ } else
+ return NULL;
}
-/************** Rule lists **************/
-
-void
-vocab_free_rule_list(parse_rule_list_t *list) {
+void vocab_free_rule_list(parse_rule_list_t *list) {
if (list) {
_vfree(list->rule);
- vocab_free_rule_list(list->next); /* Yep, this is slow and memory-intensive. */
+ vocab_free_rule_list(list->next); // Yep, this is slow and memory-intensive.
free(list);
}
}
-static inline int
-_rules_equal_p(parse_rule_t *r1, parse_rule_t *r2) {
- if ((r1->id != r2->id)
- || (r1->length != r2->length)
- || (r1->first_special != r2->first_special))
+static inline int _rules_equal_p(parse_rule_t *r1, parse_rule_t *r2) {
+ if ((r1->id != r2->id) || (r1->length != r2->length) || (r1->first_special != r2->first_special))
return 0;
return !(memcmp(r1->data, r2->data, sizeof(int) * r1->length));
}
-static parse_rule_list_t *
-_vocab_add_rule(parse_rule_list_t *list, parse_rule_t *rule) {
+static parse_rule_list_t *_vocab_add_rule(parse_rule_list_t *list, parse_rule_t *rule) {
parse_rule_list_t *new_elem;
int term;
@@ -281,19 +257,21 @@ _vocab_add_rule(parse_rule_list_t *list, parse_rule_t *rule) {
if (!list)
return new_elem;
- else/* if (term < list->terminal) {
- new_elem->next = list;
- return new_elem;
- } else*/ {
+ else {
+/* if (term < list->terminal) {
+ new_elem->next = list;
+ return new_elem;
+ } else {*/
parse_rule_list_t *seeker = list;
while (seeker->next/* && seeker->next->terminal <= term*/) {
- if (seeker->next->terminal == term)
+ if (seeker->next->terminal == term) {
if (_rules_equal_p(seeker->next->rule, rule)) {
_vfree(rule);
free(new_elem);
- return list; /* No duplicate rules */
+ return list; // No duplicate rules
}
+ }
seeker = seeker->next;
}
@@ -303,8 +281,7 @@ _vocab_add_rule(parse_rule_list_t *list, parse_rule_t *rule) {
}
}
-static void
-_vprl(parse_rule_list_t *list, int pos) {
+static void _vprl(parse_rule_list_t *list, int pos) {
if (list) {
sciprintf("R%03d: ", pos);
vocab_print_rule(list->rule);
@@ -315,31 +292,27 @@ _vprl(parse_rule_list_t *list, int pos) {
}
}
-void
-vocab_print_rule_list(parse_rule_list_t *list) {
+void vocab_print_rule_list(parse_rule_list_t *list) {
_vprl(list, 0);
}
-static parse_rule_list_t *
-_vocab_split_rule_list(parse_rule_list_t *list) {
- if (!list->next
- || (list->next->terminal)) {
+static parse_rule_list_t *_vocab_split_rule_list(parse_rule_list_t *list) {
+ if (!list->next || (list->next->terminal)) {
parse_rule_list_t *tmp = list->next;
list->next = NULL;
return tmp;
- } else return _vocab_split_rule_list(list->next);
+ } else
+ return _vocab_split_rule_list(list->next);
}
-static void
-_vocab_free_empty_rule_list(parse_rule_list_t *list) {
+static void _vocab_free_empty_rule_list(parse_rule_list_t *list) {
if (list->next)
_vocab_free_empty_rule_list(list->next);
free(list);
}
-static parse_rule_list_t *
-_vocab_merge_rule_lists(parse_rule_list_t *l1, parse_rule_list_t *l2) {
+static parse_rule_list_t *_vocab_merge_rule_lists(parse_rule_list_t *l1, parse_rule_list_t *l2) {
parse_rule_list_t *retval = l1, *seeker = l2;
while (seeker) {
retval = _vocab_add_rule(retval, seeker->rule);
@@ -350,14 +323,11 @@ _vocab_merge_rule_lists(parse_rule_list_t *l1, parse_rule_list_t *l2) {
return retval;
}
-static int
-_vocab_rule_list_length(parse_rule_list_t *list) {
+static int _vocab_rule_list_length(parse_rule_list_t *list) {
return ((list) ? _vocab_rule_list_length(list->next) + 1 : 0);
}
-
-static parse_rule_list_t *
-_vocab_clone_rule_list_by_id(parse_rule_list_t *list, int id) {
+static parse_rule_list_t *_vocab_clone_rule_list_by_id(parse_rule_list_t *list, int id) {
parse_rule_list_t *result = NULL;
parse_rule_list_t *seeker = list;
@@ -371,9 +341,7 @@ _vocab_clone_rule_list_by_id(parse_rule_list_t *list, int id) {
return result;
}
-
-parse_rule_list_t *
-_vocab_build_gnf(parse_tree_branch_t *branches, int branches_nr, int verbose) {
+parse_rule_list_t *_vocab_build_gnf(parse_tree_branch_t *branches, int branches_nr, int verbose) {
int i;
int iterations = 0;
int last_termrules, termrules = 0;
@@ -381,10 +349,10 @@ _vocab_build_gnf(parse_tree_branch_t *branches, int branches_nr, int verbose) {
parse_rule_list_t *ntlist = NULL;
parse_rule_list_t *tlist, *new_tlist;
- for (i = 1; i < branches_nr; i++) { /* branch rule 0 is treated specially */
+ for (i = 1; i < branches_nr; i++) { // branch rule 0 is treated specially
parse_rule_t *rule = _vbuild_rule(branches + i);
-
- if (!rule) return NULL;
+ if (!rule)
+ return NULL;
ntlist = _vocab_add_rule(ntlist, rule);
}
@@ -417,13 +385,12 @@ _vocab_build_gnf(parse_tree_branch_t *branches, int branches_nr, int verbose) {
}
tlist = _vocab_merge_rule_lists(tlist, new_tlist);
-
new_tlist = new_new_tlist;
-
termrules = _vocab_rule_list_length(new_new_tlist);
if (verbose)
sciprintf("After iteration #%d: %d new term rules\n", ++iterations, termrules);
+
} while (termrules && (iterations < 30));
vocab_free_rule_list(ntlist);
@@ -436,32 +403,25 @@ _vocab_build_gnf(parse_tree_branch_t *branches, int branches_nr, int verbose) {
return tlist;
}
-parse_rule_list_t *
-vocab_build_gnf(parse_tree_branch_t *branches, int branches_nr) {
+parse_rule_list_t *vocab_build_gnf(parse_tree_branch_t *branches, int branches_nr) {
return _vocab_build_gnf(branches, branches_nr, 0);
}
-
-void
-vocab_gnf_dump(parse_tree_branch_t *branches, int branches_nr) {
+void vocab_gnf_dump(parse_tree_branch_t *branches, int branches_nr) {
parse_rule_list_t *tlist = _vocab_build_gnf(branches, branches_nr, 1);
sciprintf("%d allocd rules\n", _allocd_rules);
vocab_free_rule_list(tlist);
}
-
-int
-vocab_build_parse_tree(parse_tree_node_t *nodes, result_word_t *words, int words_nr,
+int vocab_build_parse_tree(parse_tree_node_t *nodes, result_word_t *words, int words_nr,
parse_tree_branch_t *branch0, parse_rule_list_t *rules) {
return vocab_gnf_parse(nodes, words, words_nr, branch0, rules, 0);
}
-
static int
-_vbpt_pareno(parse_tree_node_t *nodes, int *pos, int base)
-/* Opens parentheses */
-{
+_vbpt_pareno(parse_tree_node_t *nodes, int *pos, int base) {
+ // Opens parentheses
nodes[base].content.branches[0] = (*pos) + 1;
nodes[++(*pos)].type = PARSE_TREE_NODE_BRANCH;
nodes[*pos].content.branches[0] = 0;
@@ -469,11 +429,8 @@ _vbpt_pareno(parse_tree_node_t *nodes, int *pos, int base)
return *pos;
}
-
-static int
-_vbpt_parenc(parse_tree_node_t *nodes, int *pos, int paren)
-/* Closes parentheses for appending */
-{
+static int _vbpt_parenc(parse_tree_node_t *nodes, int *pos, int paren) {
+ // Closes parentheses for appending
nodes[paren].content.branches[1] = ++(*pos);
nodes[*pos].type = PARSE_TREE_NODE_BRANCH;
nodes[*pos].content.branches[0] = 0;
@@ -481,11 +438,8 @@ _vbpt_parenc(parse_tree_node_t *nodes, int *pos, int paren)
return *pos;
}
-
-static int
-_vbpt_append(parse_tree_node_t *nodes, int *pos, int base, int value)
-/* writes one value to an existing base node and creates a successor node for writing */
-{
+static int _vbpt_append(parse_tree_node_t *nodes, int *pos, int base, int value) {
+ // writes one value to an existing base node and creates a successor node for writing
nodes[base].content.branches[0] = ++(*pos);
nodes[*pos].type = PARSE_TREE_NODE_LEAF;
nodes[*pos].content.value = value;
@@ -496,20 +450,16 @@ _vbpt_append(parse_tree_node_t *nodes, int *pos, int base, int value)
return *pos;
}
-
-static int
-_vbpt_terminate(parse_tree_node_t *nodes, int *pos, int base, int value)
-/* Terminates, overwriting a nextwrite forknode */
-{
+static int _vbpt_terminate(parse_tree_node_t *nodes, int *pos, int base, int value) {
+ // Terminates, overwriting a nextwrite forknode
nodes[base].type = PARSE_TREE_NODE_LEAF;
nodes[base].content.value = value;
return *pos;
}
-static int
-_vbpt_write_subexpression(parse_tree_node_t *nodes, int *pos,
- parse_rule_t *rule, int rulepos, int writepos) {
+static int _vbpt_write_subexpression(parse_tree_node_t *nodes, int *pos, parse_rule_t *rule, int rulepos, int writepos) {
uint token;
+
while ((token = ((rulepos < rule->length) ? rule->data[rulepos++] : TOKEN_CPAREN)) != TOKEN_CPAREN) {
uint nexttoken = (rulepos < rule->length) ? rule->data[rulepos] : TOKEN_CPAREN;
if (token == TOKEN_OPAREN) {
@@ -535,10 +485,9 @@ _vbpt_write_subexpression(parse_tree_node_t *nodes, int *pos,
return rulepos;
}
-int
-vocab_gnf_parse(parse_tree_node_t *nodes, result_word_t *words, int words_nr,
+int vocab_gnf_parse(parse_tree_node_t *nodes, result_word_t *words, int words_nr,
parse_tree_branch_t *branch0, parse_rule_list_t *tlist, int verbose) {
- /* Get the start rules: */
+ // Get the start rules:
parse_rule_list_t *work = _vocab_clone_rule_list_by_id(tlist, branch0->data[1]);
parse_rule_list_t *results = NULL;
int word;
@@ -553,7 +502,6 @@ vocab_gnf_parse(parse_tree_node_t *nodes, result_word_t *words, int words_nr,
seeker = work;
while (seeker) {
-
if (seeker->rule->specials_nr <= (words_nr - word))
reduced_rules = _vocab_add_rule(reduced_rules, _vsatisfy_rule(seeker->rule, words + word));
@@ -588,7 +536,7 @@ vocab_gnf_parse(parse_tree_node_t *nodes, result_word_t *words, int words_nr,
seeker = seeker->next;
}
vocab_free_rule_list(reduced_rules);
- } else /* last word */
+ } else // last word
new_work = reduced_rules;
work = new_work;
@@ -604,13 +552,12 @@ vocab_gnf_parse(parse_tree_node_t *nodes, result_word_t *words, int words_nr,
results = work;
if (verbose) {
- sciprintf("All results (excluding the surrounding '(141 %03x' and ')'):\n",
- branch0->id);
+ sciprintf("All results (excluding the surrounding '(141 %03x' and ')'):\n", branch0->id);
vocab_print_rule_list(results);
sciprintf("\n");
}
- /* now use the first result */
+ // now use the first result
{
int temp, pos;
@@ -628,10 +575,11 @@ vocab_gnf_parse(parse_tree_node_t *nodes, result_word_t *words, int words_nr,
pos = 2;
temp = _vbpt_append(nodes, &pos, 2, branch0->id);
- /* _vbpt_write_subexpression(nodes, &pos, results[_vocab_rule_list_length(results)].rule, 0, temp); */
+ //_vbpt_write_subexpression(nodes, &pos, results[_vocab_rule_list_length(results)].rule, 0, temp);
_vbpt_write_subexpression(nodes, &pos, results->rule, 0, temp);
}
vocab_free_rule_list(results);
+
return 0;
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-12 13:25:46 +0000