/
encode.go
154 lines (132 loc) · 3.36 KB
/
encode.go
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
// Copyright ©2017 The go-hep Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package slha
import (
"fmt"
"io"
"math"
"strings"
)
func blockFormat(name string, nargs int) string {
switch name {
case "MASS":
//return "(1x,I9,3x,1P,E16.8,0P,3x,’#’,1x,A)"
return " %9d %16.8E # %s\n"
case "NMIX", "UMIX", "VMIX", "STOPMIX", "SBOTMIX", "STAUMIX",
"USQMIX", "DSQMIX", "SELMIX", "SNUMIX", // FIXME(sbinet) right format ?
"AU", "AD", "AE",
"YU", "YD", "YE",
"TU", "TD", "TE",
"TUIN", "TDIN", "TEIN",
"MSQ2IN", "MSU2IN", "MSD2IN", "MSL2IN", "MSE2IN",
"MSQ2", "MSU2", "MSD2", "MSL2", "MSE2",
"VCKM", "IMVCKM",
"UPMNS", "IMUPMNS":
//return "(1x,I2,1x,I2,3x,1P,E16.8,0P,3x,’#’,1x,A)"
return " %2d %2d %16.8E # %s\n"
case "ALPHA":
// return "(9x,1P,E16.8,0P,3x,’#’,1x,A)"
return " %16.8E # %s\n"
case "HMIX",
"GAUGE",
"MSOFT":
//return "(1x,I5,3x,1P,E16.8,0P,3x,’#’,1x,A)"
return " %5d %16.8E # %s\n"
case "SMINPUTS", "VCKMIN", "UPMNSIN":
//return "(1x,I5,3x,A)"
return " %5d %16.8E # %s\n"
case "MINPAR", "EXTPAR", "QEXTPAR":
return " %5d %16.8E # %s\n"
case "SPINFO", "DCINFO":
return " %5d %-8s # %s\n"
case "MODSEL":
return " %5d %5d # %s\n"
}
return strings.Repeat(" %v", nargs-1) + " # %s\n"
}
const (
particleHeader = "# PDG Width\n"
decayHeader = "# BR NDA ID1 ID2\n"
decayLineFront = " %16.8E %2d "
decayLineID = " %9d"
decayLineBack = " # %s\n"
)
// Encode writes the SLHA informations to w.
func Encode(w io.Writer, data *SLHA) error {
var err error
for i := range data.Blocks {
blk := &data.Blocks[i]
str := []string{"BLOCK", blk.Name}
if !math.IsNaN(blk.Q) {
str = append(str, fmt.Sprintf("Q=%16.8E", blk.Q))
}
if blk.Comment != "" {
str = append(str, " # "+blk.Comment)
}
_, err = fmt.Fprintf(w, "%s\n", strings.Join(str, " "))
if err != nil {
return err
}
for _, item := range blk.Data {
v := item.Value
idx := item.Index.Index() //
args := make([]interface{}, 0, len(idx)+2)
if blk.Name != "ALPHA" {
for _, v := range idx {
args = append(args, v)
}
}
args = append(args, v.Interface(), v.Comment())
format := blockFormat(blk.Name, len(args))
_, err = fmt.Fprintf(w, format, args...)
if err != nil {
return err
}
}
_, err = fmt.Fprintf(w, "#\n")
if err != nil {
return err
}
}
for i := range data.Particles {
part := &data.Particles[i]
_, err = fmt.Fprintf(w, "%sDECAY %9d %16.8E # %s\n", particleHeader, part.PdgID, part.Width, part.Comment)
if err != nil {
return err
}
if len(part.Decays) <= 0 {
_, err = fmt.Fprintf(w, "#\n")
if err != nil {
return err
}
continue
}
_, err = fmt.Fprintf(w, decayHeader)
if err != nil {
return err
}
for j := range part.Decays {
decay := &part.Decays[j]
_, err = fmt.Fprintf(w, decayLineFront, decay.Br, len(decay.IDs))
if err != nil {
return err
}
for _, id := range decay.IDs {
_, err = fmt.Fprintf(w, decayLineID, id)
if err != nil {
return err
}
}
_, err = fmt.Fprintf(w, decayLineBack, decay.Comment)
if err != nil {
return err
}
}
_, err = fmt.Fprintf(w, "#\n")
if err != nil {
return err
}
}
return err
}