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
|
#+private
package os
import win32 "core:sys/windows"
import "base:runtime"
_lookup_env_alloc :: proc(key: string, allocator: runtime.Allocator) -> (value: string, found: bool) {
if key == "" {
return
}
temp_allocator := TEMP_ALLOCATOR_GUARD({ allocator })
wkey, _ := win32_utf8_to_wstring(key, temp_allocator)
n := win32.GetEnvironmentVariableW(wkey, nil, 0)
if n == 0 {
err := win32.GetLastError()
if err == win32.ERROR_ENVVAR_NOT_FOUND {
return "", false
}
return "", true
}
b := make([]u16, n+1, temp_allocator)
n = win32.GetEnvironmentVariableW(wkey, raw_data(b), u32(len(b)))
if n == 0 {
err := win32.GetLastError()
if err == win32.ERROR_ENVVAR_NOT_FOUND {
return "", false
}
return "", false
}
value = win32_utf16_to_utf8(string16(b[:n]), allocator) or_else ""
found = true
return
}
// This version of `lookup_env` doesn't allocate and instead requires the user to provide a buffer.
// Note that it is limited to environment names and values of 512 utf-16 values each
// due to the necessary utf-8 <> utf-16 conversion.
@(require_results)
_lookup_env_buf :: proc(buf: []u8, key: string) -> (value: string, err: Error) {
key_buf: [513]u16
wkey := win32.utf8_to_wstring(key_buf[:], key)
if wkey == nil {
return "", .Buffer_Full
}
n2 := win32.GetEnvironmentVariableW(wkey, nil, 0)
if n2 == 0 {
return "", .Env_Var_Not_Found
}
val_buf: [513]u16
n2 = win32.GetEnvironmentVariableW(wkey, raw_data(val_buf[:]), u32(len(val_buf[:])))
if n2 == 0 {
return "", .Env_Var_Not_Found
} else if int(n2) > len(buf) {
return "", .Buffer_Full
}
value = win32.utf16_to_utf8(buf, val_buf[:n2])
return value, nil
}
_lookup_env :: proc{_lookup_env_alloc, _lookup_env_buf}
_set_env :: proc(key, value: string) -> Error {
temp_allocator := TEMP_ALLOCATOR_GUARD({})
k := win32_utf8_to_wstring(key, temp_allocator) or_return
v := win32_utf8_to_wstring(value, temp_allocator) or_return
if !win32.SetEnvironmentVariableW(k, v) {
return _get_platform_error()
}
return nil
}
_unset_env :: proc(key: string) -> bool {
temp_allocator := TEMP_ALLOCATOR_GUARD({})
k, _ := win32_utf8_to_wstring(key, temp_allocator)
return bool(win32.SetEnvironmentVariableW(k, nil))
}
_clear_env :: proc() {
temp_allocator := TEMP_ALLOCATOR_GUARD({})
envs, _ := environ(temp_allocator)
for env in envs {
for j in 1..<len(env) {
if env[j] == '=' {
unset_env(env[0:j])
break
}
}
}
}
_environ :: proc(allocator: runtime.Allocator) -> (environ: []string, err: Error) {
envs := win32.GetEnvironmentStringsW()
if envs == nil {
return
}
defer win32.FreeEnvironmentStringsW(envs)
n := 0
for from, i, p := 0, 0, envs; true; i += 1 {
c := ([^]u16)(p)[i]
if c == 0 {
if i <= from {
break
}
n += 1
from = i + 1
}
}
r := make([dynamic]string, 0, n, allocator) or_return
defer if err != nil {
for e in r {
delete(e, allocator)
}
delete(r)
}
for from, i, p := 0, 0, envs; true; i += 1 {
c := ([^]u16)(p)[i]
if c == 0 {
if i <= from {
break
}
w := ([^]u16)(p)[from:i]
s := win32_utf16_to_utf8(w, allocator) or_return
append(&r, s)
from = i + 1
}
}
environ = r[:]
return
}
|
