Change 50722709 by junyangl@junyangl:latency:20:citc on 2013/08/12 11:06:20

	Wrap the parser for Hunspell check.
	Use a parameter/dynamic flag to control which parser to use.
	Fix bug in hunspell TextParser to accept very long input.
	
	PRESUBMIT=passed
	R=lianglin,shine,jiho
	CC=caribou-backend-reviews,caribou-prod-reviews
	APPROVED=jiho,shine
	DELTA=527 (420 added, 51 deleted, 56 changed)
	OCL=50412080

Affected files ...

... //depot/google3/caribou/medley/lib/internal/medley_server.cc#239 edit
... //depot/google3/caribou/spell/BUILD#46 edit
... //depot/google3/caribou/spell/server_main.cc#7 edit
... //depot/google3/caribou/spell/spell_server.cc#15 edit
... //depot/google3/caribou/spell/spell_server.h#5 edit
... //depot/google3/caribou/spell/spellcheck.cc#61 edit
... //depot/google3/caribou/spell/spellcheck.h#24 edit
... //depot/google3/caribou/spell/spellcheck_benchmark.cc#2 edit
... //depot/google3/caribou/spell/spellcheck_parser.cc#1 add
... //depot/google3/caribou/spell/spellcheck_parser.h#1 add
... //depot/google3/caribou/spell/spellcheck_parser_test.cc#1 add
... //depot/google3/caribou/spell/spellcheck_unittest.cc#56 edit
... //depot/google3/caribou/spell/stats.cc#9 edit
... //depot/google3/caribou/spell/stats.h#8 edit
... //depot//README.google#4 edit
... //depot//src/parsers/htmlparser.cxx#3 edit
... //depot//src/parsers/htmlparser.hxx#2 edit
... //depot//src/parsers/textparser.cxx#2 edit
... //depot//src/parsers/textparser.hxx#2 edit

==== //depot//src/parsers/htmlparser.cxx#2 - /google/src/files/50722709/depot//src/parsers/htmlparser.cxx ====
--- /google/src/files/49864191/depot//src/parsers/htmlparser.cxx	2013-07-24 23:12:12.000000000 -0400
+++ /google/src/files/50722709/depot//src/parsers/htmlparser.cxx	2013-08-12 14:06:20.000000000 -0400
@@ -43,10 +43,8 @@
 	init(wordchars);
 }
 
-HTMLParser::HTMLParser(unsigned short * wordchars, int len)
-{
-	init(wordchars, len);
-}
+HTMLParser::HTMLParser(unsigned short *wordchars, int len, int text_len)
+    : TextParser(wordchars, len, text_len) {}
 
 HTMLParser::~HTMLParser() 
 {
==== //depot//src/parsers/htmlparser.hxx#1 - /google/src/files/50722709/depot//src/parsers/htmlparser.hxx ====
--- /google/src/files/37375269/depot//src/parsers/htmlparser.hxx	2012-10-31 14:23:51.000000000 -0400
+++ /google/src/files/50722709/depot//src/parsers/htmlparser.hxx	2013-08-12 14:06:20.000000000 -0400
@@ -23,7 +23,7 @@
 public:
  
   HTMLParser(const char * wc);
-  HTMLParser(unsigned short * wordchars, int len);
+  HTMLParser(unsigned short * wordchars, int len, int text_len);
   virtual ~HTMLParser();
 
   virtual char *              next_token();
==== //depot//src/parsers/textparser.cxx#1 - /google/src/files/50722709/depot//src/parsers/textparser.cxx ====
--- /google/src/files/37375269/depot//src/parsers/textparser.cxx	2012-10-31 14:23:51.000000000 -0400
+++ /google/src/files/50722709/depot//src/parsers/textparser.cxx	2013-08-12 14:06:20.000000000 -0400
@@ -55,13 +55,25 @@
 	init(wordchars);
 }
 
-TextParser::TextParser(unsigned short * wordchars, int len)
+TextParser::TextParser(unsigned short * wordchars, int len, int text_len)
 {
-	init(wordchars, len);
+  // Note(junyangl@google.com): Dynamically allocate space according to text_len
+  // to avoid segfault for too long input.
+  for (int i = 0; i < MAXPREVLINE; i++) {
+    line[i] = (char*)malloc(text_len + 1);
+  }
+  urlline = (char*)malloc(text_len + 1);
+
+  init(wordchars, len);
 }
 
 TextParser::~TextParser() 
 {
+  // Note(junyangl@google.com): Free dynamically allocated space.
+  for (int i = 0; i < MAXPREVLINE; i++) {
+    free(line[i]);
+  }
+  free(urlline);
 }
 
 int TextParser::is_wordchar(char * w)
==== //depot//src/parsers/textparser.hxx#1 - /google/src/files/50722709/depot//src/parsers/textparser.hxx ====
--- /google/src/files/37375269/depot//src/parsers/textparser.hxx	2012-10-31 14:23:51.000000000 -0400
+++ /google/src/files/50722709/depot//src/parsers/textparser.hxx	2013-08-12 14:06:20.000000000 -0400
@@ -29,8 +29,10 @@
   void                init(const char *);
   void                init(unsigned short * wordchars, int len);
   int                 wordcharacters[256]; // for detection of the word boundaries
-  char                line[MAXPREVLINE][MAXLNLEN]; // parsed and previous lines
-  char                urlline[MAXLNLEN]; // mask for url detection
+  // Note(junyangl@google.com): Dynamically allocate space for line and urlline
+  // according to input length, to avoid segfault when the input is too long.
+  char *              line[MAXPREVLINE]; // parsed and previous lines
+  char *              urlline; // mask for url detection
   int                 checkurl;
   int                 actual; // actual line
   int                 head;   // head position
@@ -44,7 +46,7 @@
 public:
  
   TextParser();
-  TextParser(unsigned short * wordchars, int len);
+  TextParser(unsigned short * wordchars, int len, int text_len);
   TextParser(const char * wc);
   virtual ~TextParser();