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
|
/*
* Copyright (c) 2013 Kurt Jung (Gmail: kurt.w.jung)
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, 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.
*/
package gofpdf
import (
"bytes"
"compress/zlib"
"fmt"
// "github.com/davecgh/go-spew/spew"
"math"
"os"
)
func round(f float64) int {
if f < 0 {
return -int(math.Floor(-f + 0.5))
}
return int(math.Floor(f + 0.5))
}
func sprintf(fmtStr string, args ...interface{}) string {
return fmt.Sprintf(fmtStr, args...)
}
// Returns true if the specified normal file exists
func fileExist(filename string) (ok bool) {
info, err := os.Stat(filename)
if err == nil {
if ^os.ModePerm&info.Mode() == 0 {
ok = true
}
}
return ok
}
// Returns the size of the specified file; ok will be false
// if the file does not exist or is not an ordinary file
func fileSize(filename string) (size int64, ok bool) {
info, err := os.Stat(filename)
ok = err == nil
if ok {
size = info.Size()
}
return
}
// Returns a new buffer populated with the contents of the specified file
func bufferFromFile(fileStr string) (b *bytes.Buffer, err error) {
var fl *os.File
fl, err = os.Open(fileStr)
if err != nil {
return
}
defer fl.Close()
b = new(bytes.Buffer)
_, err = b.ReadFrom(fl)
return
}
// Returns a zlib-compressed copy of the specified byte array
func sliceCompress(data []byte) []byte {
var buf bytes.Buffer
cmp := zlib.NewWriter(&buf)
cmp.Write(data)
cmp.Close()
return buf.Bytes()
}
// Returns an uncompressed copy of the specified zlib-compressed byte array
func sliceUncompress(data []byte) (outData []byte, err error) {
inBuf := bytes.NewBuffer(data)
r, err := zlib.NewReader(inBuf)
defer r.Close()
if err == nil {
var outBuf bytes.Buffer
_, err = outBuf.ReadFrom(r)
if err == nil {
outData = outBuf.Bytes()
}
}
return
}
// Convert UTF-8 to UTF-16BE with BOM; from http://www.fpdf.org/
func utf8toutf16(s string) string {
res := make([]byte, 0, 8)
res = append(res, 0xFE, 0xFF)
nb := len(s)
i := 0
for i < nb {
c1 := byte(s[i])
i++
if c1 >= 224 {
// 3-byte character
c2 := byte(s[i])
i++
c3 := byte(s[i])
i++
res = append(res, ((c1&0x0F)<<4)+((c2&0x3C)>>2),
((c2&0x03)<<6)+(c3&0x3F))
} else if c1 >= 192 {
// 2-byte character
c2 := byte(s[i])
i++
res = append(res, ((c1 & 0x1C) >> 2),
((c1&0x03)<<6)+(c2&0x3F))
} else {
// Single-byte character
res = append(res, 0, c1)
}
}
return string(res)
}
// Return a if cnd is true, otherwise b
func intIf(cnd bool, a, b int) int {
if cnd {
return a
}
return b
}
// Return aStr if cnd is true, otherwise bStr
func strIf(cnd bool, aStr, bStr string) string {
if cnd {
return aStr
}
return bStr
}
// Dump the internals of the specified values
// func dump(fileStr string, a ...interface{}) {
// fl, err := os.OpenFile(fileStr, os.O_CREATE|os.O_APPEND|os.O_WRONLY, 0600)
// if err == nil {
// fmt.Fprintf(fl, "----------------\n")
// spew.Fdump(fl, a...)
// fl.Close()
// }
// }
|
