/usr/include/xbase64/xbexp.h is in libxbase64-dev 3.1.2-4.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 | /* xbexp.h
Xbase64 project source code
This file contains a header file for the EXP object, which is
used for expression processing.
Copyright (C) 1997,2003 Gary A Kunkel
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
Contact:
Email:
xdb-devel@lists.sourceforge.net
xdb-users@lists.sourceforge.net
Regular Mail:
XBase Support
149C South Main St
Keller Texas, 76248
USA
*/
#ifndef __XB_EXP_H__
#define __XB_EXP_H__
#ifdef __GNU_LesserG__
#pragma interface
#endif
#include <xbase64/xbase64.h>
#ifdef XB_EXPRESSIONS /* compile if expression logic on */
#include <xbase64/xbtypes.h>
/*! \file xbexp.h
*/
#undef ABS
#undef MIN
#undef MAX
class XBDLLEXPORT xbDbf;
/************************************************************************/
//! xbFuncDtl struct
/*! This structure defines function information
*/
struct XBDLLEXPORT xbFuncDtl {
const char * FuncName; /* function name */
xbShort ParmCnt; /* no of parms it needs */
char ReturnType; /* return type of function */
void (*ExpFuncPtr)(); /* pointer to function routine */
};
/************************************************************************/
//! xbExpNode struct
/*! This class defines a node within a tree of nodes, each token
in an expression gets placed onto its own node
*/
class XBDLLEXPORT xbExpNode {
public:
xbExpNode();
virtual ~xbExpNode();
public:
char * NodeText; /* expression text */
char Type; /* same as TokenType below */
xbShort Len; /* length of expression text */
xbShort InTree; /* this node in the tree? 1=yes */
xbExpNode * Node; /* pointer to parent */
xbExpNode * Sibling1; /* pointer to sibling 1 */
xbExpNode * Sibling2; /* pointer to sibling 2 */
xbExpNode * Sibling3; /* pointe/r to sibling 3 */
xbShort DataLen; /* length of data in result buffer */
xbShort ResultLen; /* length of result buffer */
xbString StringResult; /* string result */
xbDouble DoubResult; /* Numeric Result */
xbShort IntResult; /* logical result */
xbDbf * dbf; /* pointer to datafile */
xbShort FieldNo; /* field no if DBF field */
char ExpressionType; /* used in head node C,N,L or D */
};
/************************************************************************/
//! xbStackElement class
/*!
*/
class XBDLLEXPORT xbStackElement
{
public:
xbStackElement();
~xbStackElement();
friend class xbExpn;
private:
xbStackElement *Previous;
xbStackElement *Next;
xbExpNode *NodePtr;
};
/************************************************************************/
//! xbExpn class
/*! This class is used for processing expressions
*/
/* Expression handler */
class XBDLLEXPORT xbExpn{
public:
xbExpn( xbXBase * );
virtual ~xbExpn();
xbShort GetNextToken( const char *s, xbShort MaxLen );
xbShort ProcessExpression( xbExpNode *n, xbShort );
xbShort ProcessExpression( xbShort opt )
{ return ProcessExpression( Tree, opt ); }
xbExpNode * GetTree() { return Tree; }
void SetTreeToNull() { Tree = NULL; }
xbExpNode * GetFirstTreeNode( xbExpNode * );
xbExpNode * GetFirstTreeNode()
{ return GetFirstTreeNode( Tree ); }
xbShort ProcessExpression( const char *exp, xbDbf * d );
xbShort ParseExpression( const char *exp, xbDbf * d );
xbExpNode * GetExpressionHandle();
char GetExpressionResultType( xbExpNode * );
char GetExpressionResultType()
{ return GetExpressionResultType( Tree ); }
char * GetCharResult();
xbString & GetStringResult();
xbDouble GetDoubleResult();
xbLong GetIntResult();
xbShort ProcessExpression( xbExpNode * );
xbShort ProcessExpression() { return ProcessExpression( Tree ); }
xbShort BuildExpressionTree( const char * Expression, xbShort MaxTokenLen,
xbDbf *d );
/* stack functions */
void InitStack();
xbExpNode * Pop();
xbShort Push(xbExpNode *);
xbShort GetStackDepth() { return StackDepth; }
void DumpStack();
const char * GetValidFuncName( xbShort funcNo )
{ return XbaseFuncList[funcNo].FuncName; }
#ifdef XBASE_DEBUG
void DumpExpressionTree( xbShort printOption )
{ DumpExpressionTree( Tree, printOption ); }
void DumpExpressionTree( xbExpNode *, xbShort printOption );
void DumpExpNode( xbExpNode *, xbShort printOption );
#endif
/* expression methods */
xbDouble ABS( xbDouble );
xbLong ASC( const char * );
xbLong AT( const char *, const char * );
char * CDOW( const char * );
char * CHR( xbLong );
char * CMONTH( const char * );
char * CTOD( const char * );
char * DATE();
xbLong DAY( const char * );
char * DESCEND( const char * );
xbLong DESCEND( const xbDate & );
xbDouble DESCEND( xbDouble );
xbLong DOW( const char * );
char * DTOC( const char * );
char * DTOS( const char * );
xbDouble EXP( xbDouble );
char * IIF( xbShort, const char *, const char * );
xbLong INT( xbDouble );
xbLong ISALPHA( const char * );
xbLong ISLOWER( const char * );
xbLong ISUPPER( const char * );
char * LEFT( const char *, xbShort );
xbLong LEN( const char * );
xbDouble LOG( xbDouble );
char * LOWER( const char * );
char * LTRIM( const char * );
xbDouble MAX( xbDouble, xbDouble );
xbLong MONTH( const char * ); /* MONTH() */
xbDouble MIN( xbDouble, xbDouble );
xbLong RECNO( xbDbf * );
char * REPLICATE( const char *, xbShort );
char * RIGHT( const char *, xbShort );
char * RTRIM( const char * );
char * SPACE( xbShort );
xbDouble SQRT( xbDouble );
char * STR( const char * );
char * STR( const char *, xbShort );
char * STR( const char *, xbShort, xbShort );
char * STR( xbDouble );
char * STR( xbDouble, xbShort );
char * STR(xbDouble, xbUShort length, xbShort numDecimals );
char * STRZERO( const char * );
char * STRZERO( const char *, xbShort );
char * STRZERO( const char *, xbShort, xbShort );
char * STRZERO( xbDouble );
char * STRZERO( xbDouble, xbShort );
char * STRZERO( xbDouble, xbShort, xbShort );
char * SUBSTR( const char *, xbShort, xbShort );
char * TRIM( const char * );
char * UPPER( const char * );
xbLong VAL( const char * );
xbLong YEAR( const char * );
protected:
xbShort IsWhiteSpace( char );
char IsSeparator( char );
xbExpNode * LoadExpNode( const char * ENodeText, const char EType,
const xbShort ELen, const xbShort BufLen );
xbShort OperatorWeight( const char *Oper, xbShort len );
xbShort ReduceComplexExpression( const char * NextToken, xbShort Len,
xbExpNode * cn, xbDbf *d );
xbShort GetFunctionTokenLen( const char *s );
xbShort ReduceFunction( const char *NextToken, xbExpNode *cn, xbDbf *d );
xbExpNode * GetNextTreeNode( xbExpNode * );
xbShort ProcessOperator( xbShort );
xbShort ProcessFunction( char * );
xbShort ValidOperation( char *, char, char );
char GetOperandType( xbExpNode * );
xbShort AlphaOperation( char * );
xbShort NumericOperation( char * );
xbShort GetFuncInfo( const char *Function, xbShort Option );
xbDouble GetDoub( xbExpNode * );
xbLong GetInt( xbExpNode * );
private:
xbXBase *xbase;
xbFuncDtl *XbaseFuncList; /* pointer to list of Xbase functions */
xbExpNode *Tree; /* pointer to tree of parsed nodes */
xbShort LogicalType; /* set to 1 for logical type nodes */
char TokenType; /* E - Expression, not in simplest form */
/* C - Constant */
/* N - Numeric Constant */
/* O - Operator */
/* F - Function */
/* D - Database Field */
/* s - character string result */
/* l - logical or short int result */
/* d - double result */
char PreviousType; /* used to see if "-" follows operator */
char * Op1; /* pointer to operand 1 */
char * Op2; /* pointer to operand 2 */
xbDouble Opd1; /* double result 1 */
xbDouble Opd2; /* double result 2 */
xbShort OpLen1; /* length of memory allocated to operand 1 */
xbShort OpLen2; /* length of memory allocated to operand 2 */
xbShort OpDataLen1; /* length of data in op1 */
xbShort OpDataLen2; /* length of data in op2 */
char OpType1; /* type of operand 1 */
char OpType2; /* type of operand 2 */
xbShort TokenLen; /* length of token */
// static xbString DefaultDateFormat; /*default date format for DTOC func*/
enum { WorkBufMaxLen = 200 };
char WorkBuf[WorkBufMaxLen+1];
/* stack variables */
xbShort StackDepth;
xbStackElement *First;
xbStackElement *Last;
};
#endif // XB_EXPRESSIONS
#endif // __XB_EXP_H__
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