Put in code to defend against signed/unsigned character problems

in the command-line shell.

FossilOrigin-Name: b94a80a832777f0e639f6a81fcfe169bf970a8c0

manifest

@@ -1,5 +1,5 @@
-C Add\sa\scouple\sof\sasserts\strying\sto\smake\sthe\soperation\sof\s\nsqlite3SelectNew()\sclearer.
+C Put\sin\scode\sto\sdefend\sagainst\ssigned/unsigned\scharacter\sproblems\nin\sthe\scommand-line\sshell.
-D 2011-10-11T20:14:41.773
+D 2011-10-11T20:41:54.810
 F Makefile.arm-wince-mingw32ce-gcc d6df77f1f48d690bd73162294bbba7f59507c72f
 F Makefile.in a162fe39e249b8ed4a65ee947c30152786cfe897
 F Makefile.linux-gcc 91d710bdc4998cb015f39edf3cb314ec4f4d7e23
@@ -180,7 +180,7 @@ F src/random.c cd4a67b3953b88019f8cd4ccd81394a8ddfaba50
 F src/resolve.c 36368f44569208fa074e61f4dd0b6c4fb60ca2b4
 F src/rowset.c 69afa95a97c524ba6faf3805e717b5b7ae85a697
 F src/select.c 94b375306bfb4590fdfd76581ae663f57e94808f
-F src/shell.c e8fe1251aee84baa2fb232ce83d938de25aa650f
+F src/shell.c a07ce148dc665e4283edf878d0fb52fed2018408
 F src/sqlite.h.in 821027573c481e45ba276b078a3ae9ebaeb9bb92
 F src/sqlite3ext.h 1a1a4f784aa9c3b00edd287940197de52487cd93
 F src/sqliteInt.h 2f66bf068131f0e499dd5e0abea3f68cd6b27b2d
@@ -966,7 +966,7 @@ F tool/symbols.sh caaf6ccc7300fd43353318b44524853e222557d5
 F tool/tostr.awk e75472c2f98dd76e06b8c9c1367f4ab07e122d06
 F tool/vdbe-compress.tcl d70ea6d8a19e3571d7ab8c9b75cba86d1173ff0f
 F tool/warnings.sh fbc018d67fd7395f440c28f33ef0f94420226381
-P f1364004836078378e4005ab3eb9c0a04e3d4ce7
+P b21b1c7bc490b193da8d8a277489eb875a507e30
-R 3342cb35f3dfdd7fe1a8faa40e73a95e
+R 7c8d9511406d6fc0a6ea749b1b39d02c
 U drh
-Z ff666d79c8aac1b8165f8cc9911a51c1
+Z 1652abdbfcdbd0d6697e8d56e8019c87

manifest.uuid

@@ -1 +1 @@
-b21b1c7bc490b193da8d8a277489eb875a507e30
+b94a80a832777f0e639f6a81fcfe169bf970a8c0

src/shell.c

@@ -74,6 +74,11 @@ extern int isatty();
 /* True if the timer is enabled */
 static int enableTimer = 0;
 
+/* ctype macros that work with signed characters */
+#define IsSpace(X)  isspace((unsigned char)X)
+#define IsDigit(X)  isdigit((unsigned char)X)
+#define ToLower(X)  (char)tolower((unsigned char)X)
+
 #if !defined(_WIN32) && !defined(WIN32) && !defined(__OS2__) && !defined(__RTP__) && !defined(_WRS_KERNEL)
 #include <sys/time.h>
 #include <sys/resource.h>
@@ -265,23 +270,23 @@ static void iotracePrintf(const char *zFormat, ...){
 */
 static int isNumber(const char *z, int *realnum){
   if( *z=='-' || *z=='+' ) z++;
-  if( !isdigit(*z) ){
+  if( !IsDigit(*z) ){
     return 0;
   }
   z++;
   if( realnum ) *realnum = 0;
-  while( isdigit(*z) ){ z++; }
+  while( IsDigit(*z) ){ z++; }
   if( *z=='.' ){
     z++;
-    if( !isdigit(*z) ) return 0;
+    if( !IsDigit(*z) ) return 0;
-    while( isdigit(*z) ){ z++; }
+    while( IsDigit(*z) ){ z++; }
     if( realnum ) *realnum = 1;
   }
   if( *z=='e' || *z=='E' ){
     z++;
     if( *z=='+' || *z=='-' ) z++;
-    if( !isdigit(*z) ) return 0;
+    if( !IsDigit(*z) ) return 0;
-    while( isdigit(*z) ){ z++; }
+    while( IsDigit(*z) ){ z++; }
     if( realnum ) *realnum = 1;
   }
   return *z==0;
@@ -1090,7 +1095,7 @@ static int shell_exec(
       if( !pStmt ){
         /* this happens for a comment or white-space */
         zSql = zLeftover;
-        while( isspace(zSql[0]) ) zSql++;
+        while( IsSpace(zSql[0]) ) zSql++;
         continue;
       }
 
@@ -1170,7 +1175,7 @@ static int shell_exec(
       rc = sqlite3_finalize(pStmt);
       if( rc==SQLITE_OK ){
         zSql = zLeftover;
-        while( isspace(zSql[0]) ) zSql++;
+        while( IsSpace(zSql[0]) ) zSql++;
       }else if( pzErrMsg ){
         *pzErrMsg = save_err_msg(db);
       }
@@ -1441,7 +1446,7 @@ static int booleanValue(char *zArg){
   int val = atoi(zArg);
   int j;
   for(j=0; zArg[j]; j++){
-    zArg[j] = (char)tolower(zArg[j]);
+    zArg[j] = ToLower(zArg[j]);
   }
   if( strcmp(zArg,"on")==0 ){
     val = 1;
@@ -1467,7 +1472,7 @@ static int do_meta_command(char *zLine, struct callback_data *p){
   /* Parse the input line into tokens.
   */
   while( zLine[i] && nArg<ArraySize(azArg) ){
-    while( isspace((unsigned char)zLine[i]) ){ i++; }
+    while( IsSpace(zLine[i]) ){ i++; }
     if( zLine[i]==0 ) break;
     if( zLine[i]=='\'' || zLine[i]=='"' ){
       int delim = zLine[i++];
@@ -1479,7 +1484,7 @@ static int do_meta_command(char *zLine, struct callback_data *p){
       if( delim=='"' ) resolve_backslashes(azArg[nArg-1]);
     }else{
       azArg[nArg++] = &zLine[i];
-      while( zLine[i] && !isspace((unsigned char)zLine[i]) ){ i++; }
+      while( zLine[i] && !IsSpace(zLine[i]) ){ i++; }
       if( zLine[i] ) zLine[i++] = 0;
       resolve_backslashes(azArg[nArg-1]);
     }
@@ -2021,7 +2026,7 @@ static int do_meta_command(char *zLine, struct callback_data *p){
     data.mode = MODE_Semi;
     if( nArg>1 ){
       int i;
-      for(i=0; azArg[1][i]; i++) azArg[1][i] = (char)tolower(azArg[1][i]);
+      for(i=0; azArg[1][i]; i++) azArg[1][i] = ToLower(azArg[1][i]);
       if( strcmp(azArg[1],"sqlite_master")==0 ){
         char *new_argv[2], *new_colv[2];
         new_argv[0] = "CREATE TABLE sqlite_master (\n"
@@ -2344,7 +2349,7 @@ static int _contains_semicolon(const char *z, int N){
 */
 static int _all_whitespace(const char *z){
   for(; *z; z++){
-    if( isspace(*(unsigned char*)z) ) continue;
+    if( IsSpace(z[0]) ) continue;
     if( *z=='/' && z[1]=='*' ){
       z += 2;
       while( *z && (*z!='*' || z[1]!='/') ){ z++; }
@@ -2369,11 +2374,11 @@ static int _all_whitespace(const char *z){
 ** as is the Oracle "/".
 */
 static int _is_command_terminator(const char *zLine){
-  while( isspace(*(unsigned char*)zLine) ){ zLine++; };
+  while( IsSpace(zLine[0]) ){ zLine++; };
   if( zLine[0]=='/' && _all_whitespace(&zLine[1]) ){
     return 1;  /* Oracle */
   }
-  if( tolower(zLine[0])=='g' && tolower(zLine[1])=='o'
+  if( ToLower(zLine[0])=='g' && ToLower(zLine[1])=='o'
          && _all_whitespace(&zLine[2]) ){
     return 1;  /* SQL Server */
   }
@@ -2443,7 +2448,7 @@ static int process_input(struct callback_data *p, FILE *in){
     nSqlPrior = nSql;
     if( zSql==0 ){
       int i;
-      for(i=0; zLine[i] && isspace((unsigned char)zLine[i]); i++){}
+      for(i=0; zLine[i] && IsSpace(zLine[i]); i++){}
       if( zLine[i]!=0 ){
         nSql = strlen30(zLine);
         zSql = malloc( nSql+3 );