From 01f75f2d68a17d52db2aa7c966e2c687b9e75897 Mon Sep 17 00:00:00 2001
From: drh <drh@noemail.net>
Date: Wed, 2 Oct 2013 20:46:30 +0000
Subject: [PATCH] In the lemon parser generator, change all hashes to unsigned
 to avoid potential problems with signed integer overflow.

FossilOrigin-Name: 8d399a03de63c15908d63ed69140ee15c6275b8d
---
 manifest      | 12 ++++++------
 manifest.uuid |  2 +-
 tool/lemon.c  | 38 +++++++++++++++++++-------------------
 3 files changed, 26 insertions(+), 26 deletions(-)

diff --git a/manifest b/manifest
index a90b2c12b9..cce6c31761 100644
--- a/manifest
+++ b/manifest
@@ -1,5 +1,5 @@
-C Bring\ssome\sfile\sformat\scomments\sin\sbtreeInt.h\sup\sto\sdate.
-D 2013-10-01T20:29:30.106
+C In\sthe\slemon\sparser\sgenerator,\schange\sall\shashes\sto\sunsigned\sto\savoid\npotential\sproblems\swith\ssigned\sinteger\soverflow.
+D 2013-10-02T20:46:30.804
 F Makefile.arm-wince-mingw32ce-gcc d6df77f1f48d690bd73162294bbba7f59507c72f
 F Makefile.in 5e41da95d92656a5004b03d3576e8b226858a28e
 F Makefile.linux-gcc 91d710bdc4998cb015f39edf3cb314ec4f4d7e23
@@ -1080,7 +1080,7 @@ F tool/fragck.tcl 5265a95126abcf6ab357f7efa544787e5963f439
 F tool/genfkey.README cf68fddd4643bbe3ff8e31b8b6d8b0a1b85e20f4
 F tool/genfkey.test 4196a8928b78f51d54ef58e99e99401ab2f0a7e5
 F tool/getlock.c f4c39b651370156cae979501a7b156bdba50e7ce
-F tool/lemon.c 680980c7935bfa1edec20c804c9e5ba4b1dd96f5
+F tool/lemon.c 323e54ac86fb2393f9950219224e304620d2fb12
 F tool/lempar.c 01ca97f87610d1dac6d8cd96ab109ab1130e76dc
 F tool/mkautoconfamal.sh f8d8dbf7d62f409ebed5134998bf5b51d7266383
 F tool/mkkeywordhash.c bb52064aa614e1426445e4b2b9b00eeecd23cc79
@@ -1118,7 +1118,7 @@ F tool/warnings-clang.sh f6aa929dc20ef1f856af04a730772f59283631d4
 F tool/warnings.sh fbc018d67fd7395f440c28f33ef0f94420226381
 F tool/wherecosttest.c f407dc4c79786982a475261866a161cd007947ae
 F tool/win/sqlite.vsix 030f3eeaf2cb811a3692ab9c14d021a75ce41fff
-P e0db7b38e1bc0edb1c3995cb23c46488aa6a0909
-R 2a738c8214c86a0fa4841687a9a6b019
+P 012d54d0d2b40888d08915082592ba75d70891c1
+R 38c31151664dc230209e6e8e0d82d69e
 U drh
-Z 1d3a10d5db55bb3286dbd9e3921936ff
+Z 767364e5a4324e897c21661eb6e99a80
diff --git a/manifest.uuid b/manifest.uuid
index 7c054883ad..f340f41c8d 100644
--- a/manifest.uuid
+++ b/manifest.uuid
@@ -1 +1 @@
-012d54d0d2b40888d08915082592ba75d70891c1
\ No newline at end of file
+8d399a03de63c15908d63ed69140ee15c6275b8d
\ No newline at end of file
diff --git a/tool/lemon.c b/tool/lemon.c
index f63e76facb..ac08250220 100644
--- a/tool/lemon.c
+++ b/tool/lemon.c
@@ -3391,7 +3391,7 @@ void print_stack_union(
   int maxdtlength;          /* Maximum length of any ".datatype" field. */
   char *stddt;              /* Standardized name for a datatype */
   int i,j;                  /* Loop counters */
-  int hash;                 /* For hashing the name of a type */
+  unsigned hash;            /* For hashing the name of a type */
   const char *name;         /* Name of the parser */
 
   /* Allocate and initialize types[] and allocate stddt[] */
@@ -4234,10 +4234,10 @@ int SetUnion(char *s1, char *s2)
 ** Code for processing tables in the LEMON parser generator.
 */
 
-PRIVATE int strhash(const char *x)
+PRIVATE unsigned strhash(const char *x)
 {
-  int h = 0;
-  while( *x) h = h*13 + *(x++);
+  unsigned h = 0;
+  while( *x ) h = h*13 + *(x++);
   return h;
 }
 
@@ -4309,8 +4309,8 @@ void Strsafe_init(){
 int Strsafe_insert(const char *data)
 {
   x1node *np;
-  int h;
-  int ph;
+  unsigned h;
+  unsigned ph;
 
   if( x1a==0 ) return 0;
   ph = strhash(data);
@@ -4364,7 +4364,7 @@ int Strsafe_insert(const char *data)
 ** if no such key. */
 const char *Strsafe_find(const char *key)
 {
-  int h;
+  unsigned h;
   x1node *np;
 
   if( x1a==0 ) return 0;
@@ -4475,8 +4475,8 @@ void Symbol_init(){
 int Symbol_insert(struct symbol *data, const char *key)
 {
   x2node *np;
-  int h;
-  int ph;
+  unsigned h;
+  unsigned ph;
 
   if( x2a==0 ) return 0;
   ph = strhash(key);
@@ -4532,7 +4532,7 @@ int Symbol_insert(struct symbol *data, const char *key)
 ** if no such key. */
 struct symbol *Symbol_find(const char *key)
 {
-  int h;
+  unsigned h;
   x2node *np;
 
   if( x2a==0 ) return 0;
@@ -4606,9 +4606,9 @@ PRIVATE int statecmp(struct config *a, struct config *b)
 }
 
 /* Hash a state */
-PRIVATE int statehash(struct config *a)
+PRIVATE unsigned statehash(struct config *a)
 {
-  int h=0;
+  unsigned h=0;
   while( a ){
     h = h*571 + a->rp->index*37 + a->dot;
     a = a->bp;
@@ -4674,8 +4674,8 @@ void State_init(){
 int State_insert(struct state *data, struct config *key)
 {
   x3node *np;
-  int h;
-  int ph;
+  unsigned h;
+  unsigned ph;
 
   if( x3a==0 ) return 0;
   ph = statehash(key);
@@ -4731,7 +4731,7 @@ int State_insert(struct state *data, struct config *key)
 ** if no such key. */
 struct state *State_find(struct config *key)
 {
-  int h;
+  unsigned h;
   x3node *np;
 
   if( x3a==0 ) return 0;
@@ -4761,9 +4761,9 @@ struct state **State_arrayof()
 }
 
 /* Hash a configuration */
-PRIVATE int confighash(struct config *a)
+PRIVATE unsigned confighash(struct config *a)
 {
-  int h=0;
+  unsigned h=0;
   h = h*571 + a->rp->index*37 + a->dot;
   return h;
 }
@@ -4816,8 +4816,8 @@ void Configtable_init(){
 int Configtable_insert(struct config *data)
 {
   x4node *np;
-  int h;
-  int ph;
+  unsigned h;
+  unsigned ph;
 
   if( x4a==0 ) return 0;
   ph = confighash(data);