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
|
fn main args: (addr array (addr array byte)) -> exit-status/ebx: int {
# initialize fs from args[1]
var filename/eax: (addr array byte) <- first-arg args
var file-state-storage: file-state
var fs/esi: (addr file-state) <- address file-state-storage
init-file-state fs, filename
#
enable-screen-grid-mode
enable-keyboard-immediate-mode
# initialize screen state from screen size
var screen-position-state-storage: screen-position-state
var screen-position-state/eax: (addr screen-position-state) <- address screen-position-state-storage
init-screen-position-state screen-position-state
normal-text
{
render fs, screen-position-state
var key/eax: byte <- read-key
compare key, 0x71 # 'q'
loop-if-!=
}
enable-keyboard-type-mode
enable-screen-type-mode
exit-status <- copy 0
}
fn render fs: (addr file-state), state: (addr screen-position-state) {
start-drawing state
render-normal fs, state
}
fn render-normal fs: (addr file-state), state: (addr screen-position-state) {
var newline-seen?/esi: boolean <- copy 0 # false
$render-normal:loop: {
# if done-drawing?(state) break
var done?/eax: boolean <- done-drawing? state
compare done?, 0 # false
break-if-!=
#
var c/eax: byte <- next-char fs
# if (c == EOF) break
compare c, 0xffffffff # EOF marker
break-if-=
# if (c == newline)
compare c, 0xa # newline
{
break-if-!=
# if it's the first newline, buffer it
compare newline-seen?, 0
{
break-if-!=
newline-seen? <- copy 1 # true
loop $render-normal:loop
}
# otherwise render two newlines
{
break-if-=
add-char state, 0xa # newline
add-char state, 0xa # newline
newline-seen? <- copy 0 # false
loop $render-normal:loop
}
}
# if c is unprintable (particularly a '\r' CR), skip it
compare c, 0x20
loop-if-<
# If there's a newline buffered and c is a space, print the buffered
# newline (hard newline).
# If there's a newline buffered and c is not a newline or space, print a
# space (soft newline).
compare newline-seen?, 0 # false
$render-normal:flush-buffered-newline: {
break-if-=
newline-seen? <- copy 0 # false
{
compare c, 0x20
break-if-!=
add-char state, 0xa # newline
break $render-normal:flush-buffered-newline
}
add-char state, 0x20 # space
# fall through to print c
}
# if (c == '*') switch to bold
compare c, 0x2a # '*'
{
break-if-!=
start-bold
render-until-asterisk fs, state
normal-text
loop $render-normal:loop
}
# if (c == '_') switch to bold
compare c, 0x5f # '_'
{
break-if-!=
start-color 0xec, 7 # 236 = darkish gray
start-bold
render-until-underscore fs, state
reset-formatting
start-color 0xec, 7 # 236 = darkish gray
loop $render-normal:loop
}
#
add-char state, c
#
loop
}
}
fn render-until-asterisk fs: (addr file-state), state: (addr screen-position-state) {
{
# if done-drawing?(state) break
var done?/eax: boolean <- done-drawing? state
compare done?, 0 # false
break-if-!=
#
var c/eax: byte <- next-char fs
# if (c == EOF) break
compare c, 0xffffffff # EOF marker
break-if-=
# if (c == '*') break
compare c, 0x2a # '*'
break-if-=
#
add-char state, c
#
loop
}
}
fn render-until-underscore fs: (addr file-state), state: (addr screen-position-state) {
{
# if done-drawing?(state) break
var done?/eax: boolean <- done-drawing? state
compare done?, 0 # false
break-if-!=
#
var c/eax: byte <- next-char fs
# if (c == EOF) break
compare c, 0xffffffff # EOF marker
break-if-=
# if (c == '_') break
compare c, 0x5f # '_'
break-if-=
#
add-char state, c
#
loop
}
}
fn first-arg args-on-stack: (addr array (addr array byte)) -> out/eax: (addr array byte) {
var args/eax: (addr array (addr array byte)) <- copy args-on-stack
var result/eax: (addr addr array byte) <- index args, 1
out <- copy *result
}
fn normal-text {
reset-formatting
start-color 0xec, 7 # 236 = darkish gray
}
|