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
|
// Copyright (C) 2019-2024 Algorand, Inc.
// This file is part of go-algorand
//
// go-algorand is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as
// published by the Free Software Foundation, either version 3 of the
// License, or (at your option) any later version.
//
// go-algorand 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 Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with go-algorand. If not, see <https://www.gnu.org/licenses/>.
package logic
import (
"errors"
"fmt"
)
func opProto(cx *EvalContext) error {
if !cx.fromCallsub {
return fmt.Errorf("proto was executed without a callsub")
}
cx.fromCallsub = false
nargs := int(cx.program[cx.pc+1])
if nargs > len(cx.Stack) {
return fmt.Errorf("callsub to proto that requires %d args with stack height %d", nargs, len(cx.Stack))
}
top := len(cx.callstack) - 1
cx.callstack[top].clear = true
cx.callstack[top].args = nargs
cx.callstack[top].returns = int(cx.program[cx.pc+2])
return nil
}
func opFrameDig(cx *EvalContext) error {
i := int8(cx.program[cx.pc+1])
top := len(cx.callstack) - 1
if top < 0 {
return errors.New("frame_dig with empty callstack")
}
topFrame := cx.callstack[top]
// If proto was used, don't allow `frame_dig` to go below specified args
if topFrame.clear && -int(i) > topFrame.args {
return fmt.Errorf("frame_dig %d in sub with %d args", i, topFrame.args)
}
idx := topFrame.height + int(i)
if idx >= len(cx.Stack) {
return errors.New("frame_dig above stack")
}
if idx < 0 {
return errors.New("frame_dig below stack")
}
cx.Stack = append(cx.Stack, cx.Stack[idx])
return nil
}
func opFrameBury(cx *EvalContext) error {
last := len(cx.Stack) - 1 // value
i := int8(cx.program[cx.pc+1])
top := len(cx.callstack) - 1
if top < 0 {
return errors.New("frame_bury with empty callstack")
}
topFrame := cx.callstack[top]
// If proto was used, don't allow `frame_bury` to go below specified args
if topFrame.clear && -int(i) > topFrame.args {
return fmt.Errorf("frame_bury %d in sub with %d args", i, topFrame.args)
}
idx := topFrame.height + int(i)
if idx >= last {
return errors.New("frame_bury above stack")
}
if idx < 0 {
return errors.New("frame_bury below stack")
}
cx.Stack[idx] = cx.Stack[last]
cx.Stack = cx.Stack[:last] // pop value
return nil
}
func opBury(cx *EvalContext) error {
last := len(cx.Stack) - 1 // value
i := int(cx.program[cx.pc+1])
idx := last - i
if idx < 0 || idx == last {
return errors.New("bury outside stack")
}
cx.Stack[idx] = cx.Stack[last]
cx.Stack = cx.Stack[:last] // pop value
return nil
}
func opPopN(cx *EvalContext) error {
n := cx.program[cx.pc+1]
top := len(cx.Stack) - int(n)
if top < 0 {
return fmt.Errorf("popn %d while stack contains %d", n, len(cx.Stack))
}
cx.Stack = cx.Stack[:top] // pop value
return nil
}
func opDupN(cx *EvalContext) error {
last := len(cx.Stack) - 1 // value
n := int(cx.program[cx.pc+1])
finalLen := len(cx.Stack) + n
cx.ensureStackCap(finalLen)
for i := 0; i < n; i++ {
// There will be enough room that this will not allocate
cx.Stack = append(cx.Stack, cx.Stack[last])
}
return nil
}
|
