Do not use strcpy() on overlapping buffers. (CVS 1187)

FossilOrigin-Name: ed6bd2eb39a0940c4f41d365ddc81ecc7066cf4e

manifest

@@ -1,5 +1,5 @@
-C Access\sto\sfree()ed\smemory\sproblem\sfixed.\s\sFound\sby\selectric\sfence.\nOnly\san\sissue\swhen\sdoing\san\sEXPLAIN\sof\sa\sCREATE\sINDEX.\s(CVS\s1186)
-D 2004-01-16T20:01:31
+C Do\snot\suse\sstrcpy()\son\soverlapping\sbuffers.\s(CVS\s1187)
+D 2004-01-17T01:16:21
 F Makefile.in 0515ff9218ad8d5a8f6220f0494b8ef94c67013b
 F Makefile.linux-gcc b86a99c493a5bfb402d1d9178dcdc4bd4b32f906
 F README f1de682fbbd94899d50aca13d387d1b3fd3be2dd
@@ -28,7 +28,7 @@ F src/btree.h 9b7c09f1e64274d7bb74a57bbfc63778f67b1048
 F src/btree_rb.c 50210dfd2a5f410c8624ef8fde8e82babd376d9f
 F src/build.c 4b95b200515d1f6ffc4ae60d5d57380afa0b4081
 F src/copy.c 9e47975ea96751c658bcf1a0c4f0bb7c6ee61e73
-F src/date.c bb89fdb9c89e367b9a728c58cb96e4823974a2c1
+F src/date.c c6b7e3fa5364d50fe19641882194f3c75364a5af
 F src/delete.c 0f81e6799c089487615d38e042a2de4d2d6192bc
 F src/encode.c 9e70ea1e4e746f23f18180949e94f1bb1c2220d3
 F src/expr.c e6a05bec1ca8d80d0901e5ff59c4ce3d9553f6cc
@@ -180,7 +180,7 @@ F www/speed.tcl 2f6b1155b99d39adb185f900456d1d592c4832b3
 F www/sqlite.tcl 3c83b08cf9f18aa2d69453ff441a36c40e431604
 F www/tclsqlite.tcl b9271d44dcf147a93c98f8ecf28c927307abd6da
 F www/vdbe.tcl 9b9095d4495f37697fd1935d10e14c6015e80aa1
-P a0f8b1f3cea9a0542f8d36898bf98df3c59f12e0
-R 22d0a66cb7de0b8a060be537991d2422
+P 6604e5f7d332b484e84d177f93c9d9f2ab54a32b
+R 56122f9d9725d849b260b2f540e95202
 U drh
-Z df4ea589467fac8b0c735260f2083f34
+Z 081176abfab2dbf18cbd619ec8f258ba

manifest.uuid

@@ -1 +1 @@
-6604e5f7d332b484e84d177f93c9d9f2ab54a32b
+ed6bd2eb39a0940c4f41d365ddc81ecc7066cf4e

src/date.c

@@ -16,7 +16,7 @@
 ** sqliteRegisterDateTimeFunctions() found at the bottom of the file.
 ** All other code has file scope.
 **
-** $Id: date.c,v 1.8 2004/01/08 02:17:32 drh Exp $
+** $Id: date.c,v 1.9 2004/01/17 01:16:21 drh Exp $
 **
 ** NOTES:
 **
@@ -452,8 +452,9 @@ static int parseModifier(const char *zMod, DateTime *p){
   int rc = 1;
   int n;
   double r;
-  char z[30];
-  for(n=0; n<sizeof(z)-1 && zMod[n]; n++){
+  char *z, zBuf[30];
+  z = zBuf;
+  for(n=0; n<sizeof(zBuf)-1 && zMod[n]; n++){
     z[n] = tolower(zMod[n]);
   }
   z[n] = 0;
@@ -526,22 +527,22 @@ static int parseModifier(const char *zMod, DateTime *p){
       ** or month or year.
       */
       if( strncmp(z, "start of ", 9)!=0 ) break;
-      zMod = &z[9];
+      z += 9;
       computeYMD(p);
       p->validHMS = 1;
       p->h = p->m = 0;
       p->s = 0.0;
       p->validTZ = 0;
       p->validJD = 0;
-      if( strcmp(zMod,"month")==0 ){
+      if( strcmp(z,"month")==0 ){
         p->D = 1;
         rc = 0;
-      }else if( strcmp(zMod,"year")==0 ){
+      }else if( strcmp(z,"year")==0 ){
         computeYMD(p);
         p->M = 1;
         p->D = 1;
         rc = 0;
-      }else if( strcmp(zMod,"day")==0 ){
+      }else if( strcmp(z,"day")==0 ){
         rc = 0;
       }
       break;
@@ -560,11 +561,10 @@ static int parseModifier(const char *zMod, DateTime *p){
     case '9': {
       n = getValue(z, &r);
       if( n<=0 ) break;
-      zMod = &z[n];
-      while( isspace(zMod[0]) ) zMod++;
-      n = strlen(zMod);
+      z += n;
+      while( isspace(z[0]) ) z++;
+      n = strlen(z);
       if( n>10 || n<3 ) break;
-      strcpy(z, zMod);
       if( z[n-1]=='s' ){ z[n-1] = 0; n--; }
       computeJD(p);
       rc = 0;