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
|
if not modules then modules = { } end modules ['util-fil'] = {
version = 1.001,
optimize = true,
comment = "companion to luat-lib.mkxl",
author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
copyright = "PRAGMA ADE / ConTeXt Development Team",
license = "see context related readme files"
}
-- For the old ones, see util-fil.lua.
local byte = string.byte
local char = string.char
utilities = utilities or { }
local files = { }
utilities.files = files
local zerobased = { }
function files.open(filename,zb)
local f = io.open(filename,"rb")
if f then
zerobased[f] = zb or false
end
return f
end
function files.close(f)
zerobased[f] = nil
f:close()
end
function files.size(f)
local current = f:seek()
local size = f:seek("end")
f:seek("set",current)
return size
end
files.getsize = files.size
function files.setposition(f,n)
if zerobased[f] then
f:seek("set",n)
else
f:seek("set",n - 1)
end
end
function files.getposition(f)
if zerobased[f] then
return f:seek()
else
return f:seek() + 1
end
end
function files.look(f,n,chars)
local p = f:seek()
local s = f:read(n)
f:seek("set",p)
if chars then
return s
else
return byte(s,1,#s)
end
end
function files.skip(f,n)
if n == 1 then
f:read(n)
else
f:seek("set",f:seek()+n)
end
end
-- readers:
files.readcardinal1 = fio.readcardinal1
files.readcardinal2 = fio.readcardinal2
files.readcardinal3 = fio.readcardinal3
files.readcardinal4 = fio.readcardinal4
files.readcardinal1le = fio.readcardinal1le or files.readcardinal1le
files.readcardinal2le = fio.readcardinal2le or files.readcardinal2le
files.readcardinal3le = fio.readcardinal3le or files.readcardinal3le
files.readcardinal4le = fio.readcardinal4le or files.readcardinal4le
files.readinteger1 = fio.readinteger1
files.readinteger2 = fio.readinteger2
files.readinteger3 = fio.readinteger3
files.readinteger4 = fio.readinteger4
files.readinteger1le = fio.readinteger1le or files.readinteger1le
files.readinteger2le = fio.readinteger2le or files.readinteger2le
files.readinteger3le = fio.readinteger3le or files.readinteger3le
files.readinteger4le = fio.readinteger4le or files.readinteger4le
files.readfixed2 = fio.readfixed2
files.readfixed4 = fio.readfixed4
files.read2dot14 = fio.read2dot14
files.setposition = fio.setposition
files.getposition = fio.getposition
files.readbyte = files.readcardinal1
files.readsignedbyte = files.readinteger1
files.readcardinal = files.readcardinal1
files.readinteger = files.readinteger1
local skipposition = fio.skipposition
files.skipposition = skipposition
files.readbytes = fio.readbytes
files.readbytetable = fio.readbytetable
files.readcardinaltable = fio.readcardinaltable
files.readintegertable = fio.readintegertable
files.readcstring = fio.readcstring
files.readcline = fio.readcline
function files.readchar(f)
return f:read(1)
end
function files.readstring(f,n)
return f:read(n or 1)
end
function files.skipshort(f,n)
skipposition(f,2*(n or 1))
end
function files.skiplong(f,n)
skipposition(f,4*(n or 1))
end
-- writers
function files.writestring(f,s)
f:write(char(byte(s,1,#s)))
end
function files.writebyte(f,b)
f:write(char(b))
end
files.writecardinal1 = fio.writecardinal1
files.writecardinal2 = fio.writecardinal2
files.writecardinal3 = fio.writecardinal3
files.writecardinal4 = fio.writecardinal4
files.writecardinal1le = fio.writecardinal1le
files.writecardinal2le = fio.writecardinal2le
files.writecardinal3le = fio.writecardinal3le
files.writecardinal4le = fio.writecardinal4le
files.writeinteger1 = fio.writeinteger1 or fio.writecardinal1
files.writeinteger2 = fio.writeinteger2 or fio.writecardinal2
files.writeinteger3 = fio.writeinteger3 or fio.writecardinal3
files.writeinteger4 = fio.writeinteger4 or fio.writecardinal4
files.writeinteger1le = files.writeinteger1le or fio.writecardinal1le
files.writeinteger2le = files.writeinteger2le or fio.writecardinal2le
files.writeinteger3le = files.writeinteger3le or fio.writecardinal3le
files.writeinteger4le = files.writeinteger4le or fio.writecardinal4le
|
