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Factor out buffered utf helper.

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This commit is contained in:
Jeroen van Rijn
2025-06-16 20:12:27 +02:00
parent 1a2f83f123
commit eef07431ef
2 changed files with 75 additions and 34 deletions
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core/os/env_windows.odin
+7 -30
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@@ -35,50 +35,27 @@ lookup_env_alloc :: proc(key: string, allocator := context.allocator) -> (value:
@(require_results)
lookup_env_buffer :: proc(buf: []u8, key: string) -> (value: string, err: Error) {
key_buf: [513]u16
n1 := win32.MultiByteToWideChar(win32.CP_UTF8, win32.MB_ERR_INVALID_CHARS, raw_data(key), i32(len(key)), nil, 0)
if n1 == 0 {
return "", nil
wkey := win32.utf8_to_wstring(key_buf[:], key)
if wkey == nil {
return "", .Buffer_Full
}
n1 = win32.MultiByteToWideChar(win32.CP_UTF8, win32.MB_ERR_INVALID_CHARS, raw_data(key), i32(len(key)), raw_data(key_buf[:]), n1)
if n1 == 0 {
return "", nil
}
n2 := win32.GetEnvironmentVariableW(raw_data(key_buf[:]), nil, 0)
n2 := win32.GetEnvironmentVariableW(wkey, nil, 0)
if n2 == 0 && get_last_error() == ERROR_ENVVAR_NOT_FOUND {
return "", .Env_Var_Not_Found
}
val_buf: [513]u16
n2 = win32.GetEnvironmentVariableW(raw_data(key_buf[:]), raw_data(val_buf[:]), u32(len(val_buf[:])))
n2 = win32.GetEnvironmentVariableW(wkey, raw_data(val_buf[:]), u32(len(val_buf[:])))
if n2 == 0 && get_last_error() == ERROR_ENVVAR_NOT_FOUND {
return "", .Env_Var_Not_Found
} else if int(n2) > len(buf) {
return "", .Buffer_Full
}
n3 := win32.WideCharToMultiByte(win32.CP_UTF8, win32.WC_ERR_INVALID_CHARS, raw_data(val_buf[:]), -1, nil, 0, nil, nil)
if n3 == 0 {
return
} else if int(n3) > len(buf) {
return "", .Buffer_Full
}
value = win32.utf16_to_utf8(buf, val_buf[:n2])
n4 := win32.WideCharToMultiByte(win32.CP_UTF8, win32.WC_ERR_INVALID_CHARS, raw_data(val_buf[:]), -1, raw_data(buf), n3, nil, nil)
if n4 == 0 {
return
} else if int(n4) > len(buf) {
return "", .Buffer_Full
}
for i in 0..<n3 {
if buf[i] == 0 {
n3 = i
break
}
}
return string(buf[:n3]), nil
return value, nil
}
lookup_env :: proc{lookup_env_alloc, lookup_env_buffer}