Improvements to JSON string dequoting.

FossilOrigin-Name: 196d66d34d9783622e6f2f79eafea1488fc6f5cf

ext/misc/json1.c

@@ -454,33 +454,29 @@ static void jsonReturn(
         }
         for(i=1, j=0; i<n-1; i++){
           char c = z[i];
-          if( c!='\\' && z[i+1] ){
+          if( c!='\\' ){
             zOut[j++] = c;
           }else{
             c = z[++i];
-            if( c=='u' && z[1] ){
+            if( c=='u' ){
               u32 v = 0, k;
-              for(k=0; k<4 && z[i+1]; i++, k++){
+              for(k=0; k<4 && i<n-2; i++, k++){
                 c = z[i+1];
                 if( c>='0' && c<='9' ) v = v*16 + c - '0';
                 else if( c>='A' && c<='F' ) v = v*16 + c - 'A' + 10;
                 else if( c>='a' && c<='f' ) v = v*16 + c - 'a' + 10;
                 else break;
               }
+              if( v==0 ) break;
               if( v<=0x7f ){
                 zOut[j++] = v;
               }else if( v<=0x7ff ){
                 zOut[j++] = 0xc0 | (v>>6);
                 zOut[j++] = 0x80 | (v&0x3f);
-              }else if( v<=0xffff ){
+              }else{
                 zOut[j++] = 0xe0 | (v>>12);
                 zOut[j++] = 0x80 | ((v>>6)&0x3f);
                 zOut[j++] = 0x80 | (v&0x3f);
-              }else if( v<=0x10ffff ){
-                zOut[j++] = 0xf0 | (v>>18);
-                zOut[j++] = 0x80 | ((v>>12)&0x3f);
-                zOut[j++] = 0x80 | ((v>>6)&0x3f);
-                zOut[j++] = 0x80 | (v&0x3f);
               }
             }else{
               if( c=='b' ){

manifest

@@ -1,5 +1,5 @@
-C Fix\scorner-case\sproblems\sin\sthe\stype\sand\satom\scolumns\sof\sjson_each()\sand\njson_tree().
+C Improvements\sto\sJSON\sstring\sdequoting.
-D 2015-08-24T02:32:04.608
+D 2015-08-24T12:42:41.080
 F Makefile.arm-wince-mingw32ce-gcc d6df77f1f48d690bd73162294bbba7f59507c72f
 F Makefile.in e2218eb228374422969de7b1680eda6864affcef
 F Makefile.linux-gcc 91d710bdc4998cb015f39edf3cb314ec4f4d7e23
@@ -192,7 +192,7 @@ F ext/misc/eval.c f971962e92ebb8b0a4e6b62949463ee454d88fa2
 F ext/misc/fileio.c d4171c815d6543a9edef8308aab2951413cd8d0f
 F ext/misc/fuzzer.c 4c84635c71c26cfa7c2e5848cf49fe2d2cfcd767
 F ext/misc/ieee754.c b0362167289170627659e84173f5d2e8fee8566e
-F ext/misc/json1.c 443f8b54b76042112f669c694683f7ecb2512580
+F ext/misc/json1.c 541004e47235cefc2843ab03c100517452931913
 F ext/misc/nextchar.c 35c8b8baacb96d92abbb34a83a997b797075b342
 F ext/misc/percentile.c bcbee3c061b884eccb80e21651daaae8e1e43c63
 F ext/misc/regexp.c af92cdaa5058fcec1451e49becc7ba44dba023dc
@@ -1378,7 +1378,7 @@ F tool/vdbe_profile.tcl 67746953071a9f8f2f668b73fe899074e2c6d8c1
 F tool/warnings-clang.sh f6aa929dc20ef1f856af04a730772f59283631d4
 F tool/warnings.sh 48bd54594752d5be3337f12c72f28d2080cb630b
 F tool/win/sqlite.vsix deb315d026cc8400325c5863eef847784a219a2f
-P 518d6220a12fb1289f699ef0821e6adfcd286ed0
+P f0aba0e120074430cd7ad93291fcc97b8a25a054
-R d6c92e3d9acd1a46fd49a9ba005fd842
+R 3625d17566ea8cc316dd4952d6bffb99
 U drh
-Z 8270e043900b276b537309af17df590f
+Z 6090b9f6d755a9917a579931aff72e9d

manifest.uuid

@@ -1 +1 @@
-f0aba0e120074430cd7ad93291fcc97b8a25a054
+196d66d34d9783622e6f2f79eafea1488fc6f5cf