File: boolfunc.h

package info (click to toggle)
ivtools 1.2.11a2-4
  • links: PTS, VCS
  • area: main
  • in suites: bullseye, buster, sid
  • size: 13,364 kB
  • sloc: cpp: 174,988; ansic: 12,717; xml: 5,359; perl: 2,164; makefile: 831; sh: 326
file content (189 lines) | stat: -rw-r--r-- 5,832 bytes parent folder | download
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
/*
 * Copyright (c) 2001 Scott E. Johnston
 * Copyright (c) 2000 IET Inc.
 * Copyright (c) 1994-1997,1999 Vectaport Inc.
 *
 * Permission to use, copy, modify, distribute, and sell this software and
 * its documentation for any purpose is hereby granted without fee, provided
 * that the above copyright notice appear in all copies and that both that
 * copyright notice and this permission notice appear in supporting
 * documentation, and that the names of the copyright holders not be used in
 * advertising or publicity pertaining to distribution of the software
 * without specific, written prior permission.  The copyright holders make
 * no representations about the suitability of this software for any purpose.
 * It is provided "as is" without express or implied warranty.
 *
 * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS
 * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS.
 * IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL,
 * INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING
 * FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
 * NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
 * WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 * 
 */

/* 
 * This is a collection of boolean operators.  They inherit the 
 * C-like promotion mechanism of NumFunc. 
 */

#if !defined(_boolfunc_h)
#define _boolfunc_h

#include <ComTerp/numfunc.h>

//: && (and) operator.
class AndFunc : public NumFunc {
public:
    AndFunc(ComTerp*, boolean pre=false);

    virtual void execute();
    virtual boolean post_eval() { return !_pre; }
    virtual const char* docstring() { 
      return "&& is the and operator"; }

protected:
    boolean _pre;
};

//: || (or) operator.
class OrFunc : public NumFunc {
public:
    OrFunc(ComTerp*, boolean pre=false);

    virtual void execute();
    virtual boolean post_eval() { return !_pre; }
    virtual const char* docstring() { 
      return "|| is the or operator"; }

protected:
    boolean _pre;

};

//: ! (negate) operator.
class NegFunc : public NumFunc {
public:
    NegFunc(ComTerp*);

    virtual void execute();
    virtual const char* docstring() { 
      return "! is the negate operator"; }

};


//: == (equality) operator.
// also useful for partial string comparison with :n keyword, i.e.
// eq("string1" "string2" :n 6) returns true.
// also useful for symbol comparison with :sym keyword.
class EqualFunc : public NumFunc {
public:
    EqualFunc(ComTerp*);

    virtual void execute();
    virtual const char* docstring() { 
      return "== is the equal operator\nbool=eq(str1 str2 :n len) -- partial string comparison\nbool=eq(sym1 sym2 :sym) -- symbol comparison"; }

};


//: != (non-equality) operator.
// also useful for partial string comparison with :n keyword.
// not_eq("string1" "string2" :n 6) returns false.
// also useful for symbol comparison with :sym keyword.
class NotEqualFunc : public NumFunc {
public:
    NotEqualFunc(ComTerp*);

    virtual void execute();
    virtual const char* docstring() { 
      return "!= is the not-equal operator\nbool=not_eq(str1 str2 :n len) -- partial string comparison\nbool=not_eq(sym1 sym2 :sym) -- symbol comparison"; }

};


//: > (greater than) operator.
// also useful for partial string comparison with :n keyword, i.e.
// gt("string1" "string2" :n 6) returns false.
// also useful for symbol comparison with :sym keyword.
class GreaterThanFunc : public NumFunc {
public:
    GreaterThanFunc(ComTerp*);

    virtual void execute();
    virtual const char* docstring() { 
      return "> is the greater-than operator\nbool=gt(str1 str2 :n len) -- partial string comparison\nbool=gt(sym1 sym2 :sym) -- symbol comparison"; }

};


//: >= (greater than or equal) operator.
// also useful for partial string comparison with :n keyword.
// also useful for symbol comparison with :sym keyword.
class GreaterThanOrEqualFunc : public NumFunc {
public:
    GreaterThanOrEqualFunc(ComTerp*);

    virtual void execute();
    virtual const char* docstring() { 
      return ">= is the greater-than-or-equal operator\nbool=gt_or_eq(str1 str2 :n len) -- partial string comparison\nbool=gt_or_eq(sym1 sym2 :sym) -- symbol comparison"; }

};


//: < (less than) operator.
// also useful for partial string comparison with :n keyword, i.e.
// lt("string2" "string1" :n 6) returns false.
// also useful for symbol comparison with :sym keyword.
class LessThanFunc : public NumFunc {
public:
    LessThanFunc(ComTerp*);

    virtual void execute();
    virtual const char* docstring() { 
      return "< is the less-than operator\nbool=lt(str1 str2 :n len) -- partial string comparison\nbool=lt(sym1 sym2 :sym) -- symbol comparison"; }

};

//: <= (less than or equal) operator.
class LessThanOrEqualFunc : public NumFunc {
// also useful for partial string comparison with :n keyword.
// also useful for symbol comparison with :sym keyword.
public:
    LessThanOrEqualFunc(ComTerp*);

    virtual void execute();
    virtual const char* docstring() { 
      return "<= is the less-than-or-equal operator\nbool=lt_or_eq(str1 str2 :n len) -- partial string comparison\nbool=lt_or_eq(sym1 sym2 :sym) -- symbol comparison"; }

};

//: returns true
class TrueFunc : public NumFunc {
// Accepts any arguments and returns true
public:
    TrueFunc(ComTerp*);

    virtual void execute();
    virtual const char* docstring() { 
      return "true([...]) -- accepts any arguments and returns true"; }

};

//: returns false
class FalseFunc : public NumFunc {
// Accepts any arguments and returns false
public:
    FalseFunc(ComTerp*);

    virtual void execute();
    virtual const char* docstring() { 
      return "false([...]) -- accepts any arguments and returns false"; }

};


#endif /* !defined(_boolfunc_h) */