Remove all vestiges of ctype.h from FTS3.

FossilOrigin-Name: b8b465ed2c56b23b50334680a2a940885b1ac530

ext/fts3/fts3_expr.c

@@ -78,7 +78,6 @@ int sqlite3_fts3_enable_parentheses = 0;
 #define SQLITE_FTS3_DEFAULT_NEAR_PARAM 10
 
 #include "fts3Int.h"
-#include <ctype.h>
 #include <string.h>
 #include <assert.h>
 
@@ -104,7 +103,7 @@ struct ParseContext {
 ** negative values).
 */
 static int fts3isspace(char c){
-  return (c&0x80)==0 ? isspace(c) : 0;
+  return c==' ' || c=='\t' || c=='\n' || c=='\r' || c=='\v' || c=='\f';
 }
 
 /*

ext/fts3/fts3_porter.c

@@ -30,7 +30,6 @@
 #include <stdlib.h>
 #include <stdio.h>
 #include <string.h>
-#include <ctype.h>
 
 #include "fts3_tokenizer.h"
 

ext/fts3/fts3_snippet.c

@@ -16,7 +16,6 @@
 #include "fts3Int.h"
 #include <string.h>
 #include <assert.h>
-#include <ctype.h>
 
 
 /*

ext/fts3/fts3_tokenizer.c

@@ -32,7 +32,6 @@
 
 #include "fts3Int.h"
 #include <assert.h>
-#include <ctype.h>
 #include <string.h>
 
 /*

ext/fts3/fts3_tokenizer1.c

@@ -30,7 +30,6 @@
 #include <stdlib.h>
 #include <stdio.h>
 #include <string.h>
-#include <ctype.h>
 
 #include "fts3_tokenizer.h"
 
@@ -53,6 +52,9 @@ typedef struct simple_tokenizer_cursor {
 static int simpleDelim(simple_tokenizer *t, unsigned char c){
   return c<0x80 && t->delim[c];
 }
+static int fts3_isalnum(int x){
+  return (x>='0' && x<='9') || (x>='A' && x<='Z') || (x>='a' && x<='z');
+}
 
 /*
 ** Create a new tokenizer instance.
@@ -87,7 +89,7 @@ static int simpleCreate(
     /* Mark non-alphanumeric ASCII characters as delimiters */
     int i;
     for(i=1; i<0x80; i++){
-      t->delim[i] = !isalnum(i) ? -1 : 0;
+      t->delim[i] = !fts3_isalnum(i) ? -1 : 0;
     }
   }
 
@@ -193,7 +195,7 @@ static int simpleNext(
         ** case-insensitivity.
         */
         unsigned char ch = p[iStartOffset+i];
-        c->pToken[i] = (char)(ch<0x80 ? tolower(ch) : ch);
+        c->pToken[i] = (char)((ch>='A' && ch<='Z') ? ch-'A'+'a' : ch);
       }
       *ppToken = c->pToken;
       *pnBytes = n;