SQLite

**    May you find forgiveness for yourself and forgive others.
**    May you share freely, never taking more than you give.
**
*************************************************************************
** This file contains routines used for analyzing expressions and
** for generating VDBE code that evaluates expressions in SQLite.
**
** $Id: expr.c,v 1.206 2005/06/12 21:35:52 drh Exp $
*/
#include "sqliteInt.h"
#include <ctype.h>

/*
** Return the 'affinity' of the expression pExpr if any.
**

  }
  return pNew;
}

/*
** When doing a nested parse, you can include terms in an expression
** that look like this:   #0 #1 #2 ...  These terms refer to elements
** on the stack.  "#0" (or just "#") means the top of the stack.
** "#1" means the next down on the stack.  And so forth.  #-1 means
** memory location 0.  #-2 means memory location 1.  And so forth.
**
** This routine is called by the parser to deal with on of those terms.
** It immediately generates code to store the value in a memory location.
** The returns an expression that will code to extract the value from
** that memory location as needed.
*/
Expr *sqlite3RegisterExpr(Parse *pParse, Token *pToken){
  Vdbe *v = pParse->pVdbe;
  Expr *p;
  int depth;
  if( v==0 ) return 0;
  if( pParse->nested==0 ){
    sqlite3ErrorMsg(pParse, "near \"%T\": syntax error", pToken);
    return 0;
  }
  p = sqlite3Expr(TK_REGISTER, 0, 0, pToken);
  if( p==0 ){
    return 0;  /* Malloc failed */
  }
  depth = atoi(&pToken->z[1]);
  if( depth>=0 ){
    p->iTable = pParse->nMem++;
    sqlite3VdbeAddOp(v, OP_Dup, depth, 0);
    sqlite3VdbeAddOp(v, OP_MemStore, p->iTable, 1);
  }else{
    p->iTable = -1-depth;
  }
  return p;
}

/*
** Join two expressions using an AND operator.  If either expression is
** NULL, then just return the other expression.
*/

*************************************************************************
** An tokenizer for SQL
**
** This file contains C code that splits an SQL input string up into
** individual tokens and sends those tokens one-by-one over to the
** parser for analysis.
**
** $Id: tokenize.c,v 1.103 2005/06/06 14:45:43 drh Exp $
*/
#include "sqliteInt.h"
#include "os.h"
#include <ctype.h>
#include <stdlib.h>

/*

      *tokenType = TK_BITAND;
      return 1;
    }
    case '~': {
      *tokenType = TK_BITNOT;
      return 1;
    }
    case '#': {
      for(i=1; isdigit(z[i]) || (i==1 && z[1]=='-'); i++){}
      *tokenType = TK_REGISTER;
      return i;
    }
    case '\'': case '"': {
      int delim = z[0];
      for(i=1; (c=z[i])!=0; i++){
        if( c==delim ){
          if( z[i+1]==delim ){
            i++;
          }else{

      return i;
    }
    case '?': {
      *tokenType = TK_VARIABLE;
      for(i=1; isdigit(z[i]); i++){}
      return i;
    }
    case ':': {
      for(i=1; IdChar(z[i]); i++){}



      *tokenType = i>1 ? TK_VARIABLE : TK_ILLEGAL;
      return i;
    }



#ifndef SQLITE_OMIT_TCL_VARIABLE
    case '$': {
      *tokenType = TK_VARIABLE;
      if( z[1]=='{' ){
        int nBrace = 1;
        for(i=2; (c=z[i])!=0 && nBrace; i++){
          if( c=='{' ){
            nBrace++;
          }else if( c=='}' ){
            nBrace--;
          }
        }
        if( c==0 ) *tokenType = TK_ILLEGAL;
      }else{
        int n = 0;

        for(i=1; (c=z[i])!=0; i++){
          if( isalnum(c) || c=='_' ){
            n++;

          }else if( c=='(' && n>0 ){
            do{
              i++;
            }while( (c=z[i])!=0 && !isspace(c) && c!=')' );
            if( c==')' ){
              i++;
            }else{
              *tokenType = TK_ILLEGAL;
            }
            break;
          }else if( c==':' && z[i+1]==':' ){
            i++;

          }else{
            break;
          }
        }
        if( n==0 ) *tokenType = TK_ILLEGAL;
      }
      return i;
    }
#endif
#ifndef SQLITE_OMIT_BLOB_LITERAL
    case 'x': case 'X': {
      if( (c=z[1])=='\'' || c=='"' ){
        int delim = c;
        *tokenType = TK_BLOB;
        for(i=2; (c=z[i])!=0; i++){
          if( c==delim ){

# 2003 September 6
#
# The author disclaims copyright to this source code.  In place of
# a legal notice, here is a blessing:
#
#    May you do good and not evil.
#    May you find forgiveness for yourself and forgive others.
#    May you share freely, never taking more than you give.
#
#***********************************************************************
# This file implements regression tests for SQLite library.  The
# focus of this script testing the sqlite_bind API.
#
# $Id: bind.test,v 1.31 2005/03/20 23:18:58 drh Exp $
#

set testdir [file dirname $argv0]
source $testdir/tester.tcl

proc sqlite_step {stmt N VALS COLS} {
  upvar VALS vals

# the $var processing is compiled into the library.
#
ifcapable {tclvar} {
  do_test bind-2.1 {
    execsql {
      DELETE FROM t1;
    }
    set VM [sqlite3_prepare $DB {INSERT INTO t1 VALUES($one,$::two,${x{y}z})}\
            -1 TX]
    set TX
  } {}
  set v1 {$one}
  set v2 {$::two}
  set v3 {${x{y}z}}
}
ifcapable {!tclvar} {
  do_test bind-2.1 {
    execsql {
      DELETE FROM t1;
    }
    set VM [sqlite3_prepare $DB {INSERT INTO t1 VALUES(:one,:two,:_)} -1 TX]