Size optimizations in vdbeapi.c. (CVS 1982)

FossilOrigin-Name: b2f3d4bb8e24212d3cef7615c24da13f29c1440c

manifest

@@ -1,5 +1,5 @@
-C Save\sa\sfew\sbytes\sin\sutf.c.\s(CVS\s1981)
-D 2004-09-24T23:20:52
+C Size\soptimizations\sin\svdbeapi.c.\s(CVS\s1982)
+D 2004-09-24T23:59:12
 F Makefile.in abdeb5bd9d017822691884935c320037c33f6ee6
 F Makefile.linux-gcc a9e5a0d309fa7c38e7c14d3ecf7690879d3a5457
 F README f1de682fbbd94899d50aca13d387d1b3fd3be2dd
@@ -77,7 +77,7 @@ F src/vacuum.c 257de36230cb988842f66eb08dc6c0250b8e05f3
 F src/vdbe.c 0542852785220807feb02b9dee1150ac2e592c8d
 F src/vdbe.h 067ca8d6750ba4f69a50284765e5883dee860181
 F src/vdbeInt.h 6017100adff362b8dfa37a69e3f1431f084bfa5b
-F src/vdbeapi.c f1e060aae5adace5f3a6ae2b0527cfe73e880f1c
+F src/vdbeapi.c 81ab9e84c55f5762f552904e6e5d309269b02017
 F src/vdbeaux.c dc3848209aee05b32636a9c1dd913a56ef8dac79
 F src/vdbemem.c ef9ac7d32acfe4bce5c5b408b1294c8d9e0cdb56
 F src/where.c 5d573333c07f259c8d3b8423d82ba774b78b63a9
@@ -247,7 +247,7 @@ F www/tclsqlite.tcl 560ecd6a916b320e59f2917317398f3d59b7cc25
 F www/vdbe.tcl 59288db1ac5c0616296b26dce071c36cb611dfe9
 F www/version3.tcl 092a01f5ef430d2c4acc0ae558d74c4bb89638a0
 F www/whentouse.tcl a8335bce47cc2fddb07f19052cb0cb4d9129a8e4
-P eabc77c99b3e78b4c620a1736d9acfa6cb1e7b67
-R c07c37cfeb3c8a36c1a7b9c5d319b905
+P 8154d545e8ae3d22490b49ce4f327605883accaa
+R 508b9be36c846738b3d04606ced87a41
 U drh
-Z b991617d4e2790fa5a311f1ff33d427d
+Z da75a2e59bfb74cfb329258a940d48f5

manifest.uuid

@@ -1 +1 @@
-8154d545e8ae3d22490b49ce4f327605883accaa
+b2f3d4bb8e24212d3cef7615c24da13f29c1440c

src/vdbeapi.c

@@ -350,21 +350,37 @@ int sqlite3_column_type(sqlite3_stmt *pStmt, int i){
   return sqlite3_value_type( columnMem(pStmt,i) );
 }
 
+/*
+** Convert the N-th element of pStmt->pColName[] into a string using
+** xFunc() then return that string.  If N is out of range, return 0.
+** If useType is 1, then use the second set of N elements (the datatype
+** names) instead of the first set.
+*/
+static const void *columnName(
+  sqlite3_stmt *pStmt,
+  int N,
+  const void *(*xFunc)(Mem*),
+  int useType
+){
+  Vdbe *p = (Vdbe *)pStmt;
+  int n = sqlite3_column_count(pStmt);
+
+  if( p==0 || N>=n || N<0 ){
+    return 0;
+  }
+  if( useType ){
+    N += n;
+  }
+  return xFunc(&p->aColName[N]);
+}
+
 
 /*
 ** Return the name of the Nth column of the result set returned by SQL
 ** statement pStmt.
 */
 const char *sqlite3_column_name(sqlite3_stmt *pStmt, int N){
-  Vdbe *p = (Vdbe *)pStmt;
-  Mem *pColName;
-
-  if( N>=sqlite3_column_count(pStmt) || N<0 ){
-    return 0;
-  }
-
-  pColName = &(p->aColName[N]);
-  return sqlite3_value_text(pColName);
+  return columnName(pStmt, N, (const void*(*)(Mem*))sqlite3_value_text, 0);
 }
 
 /*
@@ -372,15 +388,7 @@ const char *sqlite3_column_name(sqlite3_stmt *pStmt, int N){
 ** pStmt, encoded as UTF-16.
 */
 const void *sqlite3_column_name16(sqlite3_stmt *pStmt, int N){
-  Vdbe *p = (Vdbe *)pStmt;
-  Mem *pColName;
-
-  if( N>=sqlite3_column_count(pStmt) || N<0 ){
-    return 0;
-  }
-
-  pColName = &(p->aColName[N]);
-  return sqlite3_value_text16(pColName);
+  return columnName(pStmt, N, (const void*(*)(Mem*))sqlite3_value_text16, 0);
 }
 
 /*
@@ -388,15 +396,7 @@ const void *sqlite3_column_name16(sqlite3_stmt *pStmt, int N){
 ** of the result set of SQL statement pStmt, encoded as UTF-8.
 */
 const char *sqlite3_column_decltype(sqlite3_stmt *pStmt, int N){
-  Vdbe *p = (Vdbe *)pStmt;
-  Mem *pColName;
-
-  if( N>=sqlite3_column_count(pStmt) || N<0 ){
-    return 0;
-  }
-
-  pColName = &(p->aColName[N+sqlite3_column_count(pStmt)]);
-  return sqlite3_value_text(pColName);
+  return columnName(pStmt, N, (const void*(*)(Mem*))sqlite3_value_text, 1);
 }
 
 /*
@@ -404,15 +404,7 @@ const char *sqlite3_column_decltype(sqlite3_stmt *pStmt, int N){
 ** of the result set of SQL statement pStmt, encoded as UTF-16.
 */
 const void *sqlite3_column_decltype16(sqlite3_stmt *pStmt, int N){
-  Vdbe *p = (Vdbe *)pStmt;
-  Mem *pColName;
-
-  if( N>=sqlite3_column_count(pStmt) || N<0 ){
-    return 0;
-  }
-
-  pColName = &(p->aColName[N+sqlite3_column_count(pStmt)]);
-  return sqlite3_value_text16(pColName);
+  return columnName(pStmt, N, (const void*(*)(Mem*))sqlite3_value_text16, 1);
 }
 
 /******************************* sqlite3_bind_  ***************************
@@ -446,14 +438,15 @@ static int vdbeUnbind(Vdbe *p, int i){
 }
 
 /*
-** Bind a blob value to an SQL statement variable.
+** Bind a text or BLOB value.
 */
-int sqlite3_bind_blob(
+static int bindText(
   sqlite3_stmt *pStmt, 
   int i, 
   const void *zData, 
   int nData, 
-  void (*xDel)(void*)
+  void (*xDel)(void*),
+  int encoding
 ){
   Vdbe *p = (Vdbe *)pStmt;
   Mem *pVar;
@@ -464,8 +457,28 @@ int sqlite3_bind_blob(
     return rc;
   }
   pVar = &p->aVar[i-1];
-  rc = sqlite3VdbeMemSetStr(pVar, zData, nData, 0, xDel);
+  rc = sqlite3VdbeMemSetStr(pVar, zData, nData, encoding, xDel);
+  if( rc ){
     return rc;
+  }
+  if( rc==SQLITE_OK && encoding!=0 ){
+    rc = sqlite3VdbeChangeEncoding(pVar, p->db->enc);
+  }
+  return rc;
+}
+
+
+/*
+** Bind a blob value to an SQL statement variable.
+*/
+int sqlite3_bind_blob(
+  sqlite3_stmt *pStmt, 
+  int i, 
+  const void *zData, 
+  int nData, 
+  void (*xDel)(void*)
+){
+  return bindText(pStmt, i, zData, nData, xDel, 0);
 }
 int sqlite3_bind_double(sqlite3_stmt *pStmt, int i, double rValue){
   int rc;
@@ -498,21 +511,7 @@ int sqlite3_bind_text(
   int nData, 
   void (*xDel)(void*)
 ){
-  Vdbe *p = (Vdbe *)pStmt;
-  Mem *pVar;
-  int rc;
-
-  rc = vdbeUnbind(p, i);
-  if( rc || zData==0 ){
-    return rc;
-  }
-  pVar = &p->aVar[i-1];
-  rc = sqlite3VdbeMemSetStr(pVar, zData, nData, SQLITE_UTF8, xDel);
-  if( rc ){
-    return rc;
-  }
-  rc = sqlite3VdbeChangeEncoding(pVar, p->db->enc);
-  return rc;
+  return bindText(pStmt, i, zData, nData, xDel, SQLITE_UTF8);
 }
 int sqlite3_bind_text16(
   sqlite3_stmt *pStmt, 
@@ -521,22 +520,7 @@ int sqlite3_bind_text16(
   int nData, 
   void (*xDel)(void*)
 ){
-  Vdbe *p = (Vdbe *)pStmt;
-  Mem *pVar;
-  int rc;
-
-  rc = vdbeUnbind(p, i);
-  if( rc || zData==0 ){
-    return rc;
-  }
-  pVar = &p->aVar[i-1];
-
-  rc = sqlite3VdbeMemSetStr(pVar, zData, nData, SQLITE_UTF16NATIVE, xDel);
-  if( rc ){
-    return rc;
-  }
-  rc = sqlite3VdbeChangeEncoding(pVar, p->db->enc);
-  return rc;
+  return bindText(pStmt, i, zData, nData, xDel, SQLITE_UTF16NATIVE);
 }
 
 /*