Merge remote-tracking branch 'upstream/master'

1 files changed, 316 insertions, 0 deletions

diff --git a/decoder/rule_lexer.ll b/decoder/rule_lexer.ll
new file mode 100644
index 00000000..083a5bb1
--- /dev/null
+++ b/decoder/rule_lexer.ll
@@ -0,0 +1,316 @@
+%option nounput
+%{
+#include "rule_lexer.h"
+
+#include <string>
+#include <iostream>
+#include <sstream>
+#include <cstring>
+#include <cassert>
+#include <stack>
+#include "tdict.h"
+#include "fdict.h"
+#include "trule.h"
+#include "verbose.h"
+
+int lex_line = 0;
+std::istream* scfglex_stream = NULL;
+RuleLexer::RuleCallback rule_callback = NULL;
+void* rule_callback_extra = NULL;
+std::vector<int> scfglex_phrase_fnames;
+
+#undef YY_INPUT
+#define YY_INPUT(buf, result, max_size) (result = scfglex_stream->read(buf, max_size).gcount())
+
+#define YY_SKIP_YYWRAP 1
+int num_rules = 0;
+int yywrap() { return 1; }
+bool fl = true;
+#define MAX_TOKEN_SIZE 255
+std::string scfglex_tmp_token(MAX_TOKEN_SIZE, '\0');
+
+#define MAX_RULE_SIZE 200
+WordID scfglex_src_rhs[MAX_RULE_SIZE];
+WordID scfglex_trg_rhs[MAX_RULE_SIZE];
+int scfglex_src_rhs_size;
+int scfglex_trg_rhs_size;
+WordID scfglex_lhs;
+int scfglex_src_arity;
+int scfglex_trg_arity;
+
+#define MAX_FEATS 100
+int scfglex_feat_ids[MAX_FEATS];
+double scfglex_feat_vals[MAX_FEATS];
+int scfglex_num_feats;
+
+#define MAX_ARITY 200
+int scfglex_nt_sanity[MAX_ARITY];
+int scfglex_src_nts[MAX_ARITY];
+// float scfglex_nt_size_means[MAX_ARITY];
+// float scfglex_nt_size_vars[MAX_ARITY];
+std::stack<TRulePtr> ctf_rule_stack;
+unsigned int ctf_level = 0;
+
+#define MAX_ALS 200
+AlignmentPoint scfglex_als[MAX_ALS];
+int scfglex_num_als;
+
+void sanity_check_trg_symbol(WordID nt, int index) {
+  if (scfglex_src_nts[index-1] != nt) {
+    std::cerr << "Target symbol with index " << index << " is of type " << TD::Convert(nt*-1)
+              << " but corresponding source is of type "
+              << TD::Convert(scfglex_src_nts[index-1] * -1) << std::endl;
+    abort();
+  }
+}
+
+void sanity_check_trg_index(int index) {
+  if (index > scfglex_src_arity) {
+    std::cerr << "Target index " << index << " exceeds source arity " << scfglex_src_arity << std::endl;
+    abort();
+  }
+  int& flag = scfglex_nt_sanity[index - 1];
+  if (flag) {
+    std::cerr << "Target index " << index << " used multiple times!" << std::endl;
+    abort();
+  }
+  flag = 1;
+}
+
+void scfglex_reset() {
+  scfglex_src_arity = 0;
+  scfglex_trg_arity = 0;
+  scfglex_num_feats = 0;
+  scfglex_src_rhs_size = 0;
+  scfglex_trg_rhs_size = 0;
+  scfglex_num_als = 0;
+}
+
+void check_and_update_ctf_stack(const TRulePtr& rp) {
+  if (ctf_level > ctf_rule_stack.size()){
+    std::cerr << "Found rule at projection level " << ctf_level << " but previous rule was at level "
+      << ctf_rule_stack.size()-1 << " (cannot exceed previous level by more than one; line " << lex_line << ")" << std::endl;
+    abort();
+  }
+  while (ctf_rule_stack.size() > ctf_level)
+    ctf_rule_stack.pop();
+  // ensure that rule has the same signature as parent (coarse) rule.  Rules may *only*
+  // differ by the rhs nonterminals, not terminals or permutation of nonterminals.
+  if (ctf_rule_stack.size() > 0) {
+    TRulePtr& coarse_rp = ctf_rule_stack.top();
+    if (rp->f_.size() != coarse_rp->f_.size() || rp->e_ != coarse_rp->e_) {
+      std::cerr << "Rule " << (rp->AsString()) << " is not a projection of " <<
+        (coarse_rp->AsString()) << std::endl;
+      abort();
+    }
+    for (int i=0; i<rp->f_.size(); ++i) {
+      if (((rp->f_[i]<0) != (coarse_rp->f_[i]<0)) ||
+          ((rp->f_[i]>0) && (rp->f_[i] != coarse_rp->f_[i]))) {
+        std::cerr << "Rule " << (rp->AsString()) << " is not a projection of " <<
+          (coarse_rp->AsString()) << std::endl;
+        abort();
+      }
+    }
+  }
+}
+
+%}
+
+REAL [\-+]?[0-9]+(\.[0-9]*([eE][-+]*[0-9]+)?)?|inf|[\-+]inf
+NT [^\t \[\],]+
+
+%x LHS_END SRC TRG FEATS FEATVAL ALIGNS
+%%
+
+<INITIAL>[ \t]	{
+  ctf_level++;
+  };
+
+<INITIAL>\[{NT}\]   {
+		scfglex_tmp_token.assign(yytext + 1, yyleng - 2);
+		scfglex_lhs = -TD::Convert(scfglex_tmp_token);
+		// std::cerr << scfglex_tmp_token << "\n";
+  		BEGIN(LHS_END);
+		}
+
+<SRC>\[{NT}\]   {
+		scfglex_tmp_token.assign(yytext + 1, yyleng - 2);
+		scfglex_src_nts[scfglex_src_arity] = scfglex_src_rhs[scfglex_src_rhs_size] = -TD::Convert(scfglex_tmp_token);
+		++scfglex_src_arity;
+		++scfglex_src_rhs_size;
+		}
+
+<SRC>\[{NT},[1-9][0-9]?\]   {
+		int index = yytext[yyleng - 2] - '0';
+		if (yytext[yyleng - 3] == ',') {
+		  scfglex_tmp_token.assign(yytext + 1, yyleng - 4);
+		} else {
+		  scfglex_tmp_token.assign(yytext + 1, yyleng - 5);
+		  index += 10 * (yytext[yyleng - 3] - '0');
+		}
+		if ((scfglex_src_arity+1) != index) {
+			std::cerr << "Src indices must go in order: expected " << scfglex_src_arity << " but got " << index << std::endl;
+			abort();
+		}
+		scfglex_src_nts[scfglex_src_arity] = scfglex_src_rhs[scfglex_src_rhs_size] = -TD::Convert(scfglex_tmp_token);
+		++scfglex_src_rhs_size;
+		++scfglex_src_arity;
+		}
+
+<TRG>\[{NT},[1-9][0-9]?\]   {
+		int index = yytext[yyleng - 2] - '0';
+		if (yytext[yyleng - 3] == ',') {
+		  scfglex_tmp_token.assign(yytext + 1, yyleng - 4);
+		} else {
+		  scfglex_tmp_token.assign(yytext + 1, yyleng - 5);
+		  index += 10 * (yytext[yyleng - 3] - '0');
+		}
+		++scfglex_trg_arity;
+		// std::cerr << "TRG INDEX: " << index << std::endl;
+		sanity_check_trg_symbol(-TD::Convert(scfglex_tmp_token), index);
+		sanity_check_trg_index(index);
+		scfglex_trg_rhs[scfglex_trg_rhs_size] = 1 - index;
+		++scfglex_trg_rhs_size;
+}
+
+<TRG>\[[1-9][0-9]?\]   {
+		int index = yytext[yyleng - 2] - '0';
+		if (yyleng == 4) {
+		  index += 10 * (yytext[yyleng - 3] - '0');
+		}
+		++scfglex_trg_arity;
+		sanity_check_trg_index(index);
+		scfglex_trg_rhs[scfglex_trg_rhs_size] = 1 - index;
+		++scfglex_trg_rhs_size;
+}
+
+<LHS_END>[ \t] { ; }
+<LHS_END>\|\|\|	{
+		scfglex_reset();
+		BEGIN(SRC);
+		}
+<INITIAL,LHS_END>.	{
+		std::cerr << "Line " << lex_line << ": unexpected input in LHS: " << yytext << std::endl;
+		abort();
+		}
+
+<SRC>\|\|\|	{
+		memset(scfglex_nt_sanity, 0, scfglex_src_arity * sizeof(int));
+		BEGIN(TRG);
+		}
+<SRC>[^ \t]+	{
+		scfglex_tmp_token.assign(yytext, yyleng);
+		scfglex_src_rhs[scfglex_src_rhs_size] = TD::Convert(scfglex_tmp_token);
+		++scfglex_src_rhs_size;
+		}
+<SRC>[ \t]+	{ ; }
+
+<TRG>\|\|\|	{
+		BEGIN(FEATS);
+		}
+<TRG>[^ \t]+	{
+		scfglex_tmp_token.assign(yytext, yyleng);
+		scfglex_trg_rhs[scfglex_trg_rhs_size] = TD::Convert(scfglex_tmp_token);
+		++scfglex_trg_rhs_size;
+		}
+<TRG>[ \t]+	{ ; }
+
+<TRG,FEATS,ALIGNS>\n	{
+                if (scfglex_src_arity != scfglex_trg_arity) {
+                  std::cerr << "Line " << lex_line << ": LHS and RHS arity mismatch!\n";
+                  abort();
+                }
+		// const bool ignore_grammar_features = false;
+		// if (ignore_grammar_features) scfglex_num_feats = 0;
+		TRulePtr rp(new TRule(scfglex_lhs, scfglex_src_rhs, scfglex_src_rhs_size, scfglex_trg_rhs, scfglex_trg_rhs_size, scfglex_feat_ids, scfglex_feat_vals, scfglex_num_feats, scfglex_src_arity, scfglex_als, scfglex_num_als));
+    check_and_update_ctf_stack(rp);
+    TRulePtr coarse_rp = ((ctf_level == 0) ? TRulePtr() : ctf_rule_stack.top());
+		rule_callback(rp, ctf_level, coarse_rp, rule_callback_extra);
+    ctf_rule_stack.push(rp);
+		// std::cerr << rp->AsString() << std::endl;
+		num_rules++;
+    lex_line++;
+    if (!SILENT) {
+      if (num_rules %   50000 == 0) { std::cerr << '.' << std::flush; fl = true; }
+      if (num_rules % 2000000 == 0) { std::cerr << " [" << num_rules << "]\n"; fl = false; }
+    }
+    ctf_level = 0;
+		BEGIN(INITIAL);
+		}
+
+<FEATS>[ \t;]	{ ; }
+<FEATS>[^ \t=;]+=	{
+		scfglex_tmp_token.assign(yytext, yyleng - 1);
+		const int fid = FD::Convert(scfglex_tmp_token);
+		if (fid < 1) {
+			std::cerr << "\nUNWEIGHED FEATURE " << scfglex_tmp_token << std::endl;
+			abort();
+		}
+		scfglex_feat_ids[scfglex_num_feats] = fid;
+		BEGIN(FEATVAL);
+		}
+<FEATS>\|\|\|	{
+		BEGIN(ALIGNS);
+		}
+<FEATVAL>{REAL}	{
+		scfglex_feat_vals[scfglex_num_feats] = strtod(yytext, NULL);
+		++scfglex_num_feats;
+		BEGIN(FEATS);
+		}
+<FEATVAL>.	{
+		std::cerr << "Line " << lex_line << ": unexpected input in feature value: " << yytext << std::endl;
+		abort();
+		}
+<FEATS>{REAL} 	{
+		scfglex_feat_ids[scfglex_num_feats] = scfglex_phrase_fnames[scfglex_num_feats];
+		scfglex_feat_vals[scfglex_num_feats] = strtod(yytext, NULL);
+		++scfglex_num_feats;
+		}
+<FEATS>.	{
+		std::cerr << "Line " << lex_line << " unexpected input in features: " << yytext << std::endl;
+		abort();
+		}
+<ALIGNS>[0-9]+-[0-9]+	{
+                int i = 0;
+		int a = 0;
+		int b = 0;
+		while (i < yyleng) {
+		  char c = yytext[i];
+		  if (c == '-') break;
+		  a *= 10;
+		  a += c - '0';
+		  ++i;
+		}
+		++i;
+		while (i < yyleng) {
+		  b *= 10;
+		  b += yytext[i] - '0';
+		  ++i;
+		}
+		scfglex_als[scfglex_num_als++]=AlignmentPoint(a,b);
+		}
+<ALIGNS>[ \t]	;
+<ALIGNS>.	{
+		std::cerr << "Line " << lex_line << ": unexpected input in alignment: " << yytext << std::endl;
+		abort();
+		}
+%%
+
+#include "filelib.h"
+
+void RuleLexer::ReadRules(std::istream* in, RuleLexer::RuleCallback func, void* extra) {
+  if (scfglex_phrase_fnames.empty()) {
+    scfglex_phrase_fnames.resize(100);
+    for (int i = 0; i < scfglex_phrase_fnames.size(); ++i) {
+      std::ostringstream os;
+      os << "PhraseModel_" << i;
+      scfglex_phrase_fnames[i] = FD::Convert(os.str());
+    }
+  }
+  lex_line = 1;
+  scfglex_stream = in;
+  rule_callback_extra = extra,
+  rule_callback = func;
+  yylex();
+}
+