80 lines
1.5 KiB
V
80 lines
1.5 KiB
V
module builtin
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const (
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cp_utf8 = 65001
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)
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pub fn (_str string) to_wide() &u16 {
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$if windows {
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unsafe {
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num_chars := (C.MultiByteToWideChar(cp_utf8, 0, charptr(_str.str), _str.len,
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0, 0))
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mut wstr := &u16(malloc((num_chars + 1) * 2)) // sizeof(wchar_t)
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if wstr != 0 {
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C.MultiByteToWideChar(cp_utf8, 0, charptr(_str.str), _str.len, wstr, num_chars)
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C.memset(&byte(wstr) + num_chars * 2, 0, 2)
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}
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return wstr
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}
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} $else {
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return 0
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}
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}
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[unsafe]
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pub fn string_from_wide(_wstr &u16) string {
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$if windows {
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unsafe {
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wstr_len := C.wcslen(_wstr)
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return string_from_wide2(_wstr, wstr_len)
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}
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} $else {
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return ''
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}
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}
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[unsafe]
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pub fn string_from_wide2(_wstr &u16, len int) string {
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$if windows {
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unsafe {
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num_chars := C.WideCharToMultiByte(cp_utf8, 0, _wstr, len, 0, 0, 0, 0)
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mut str_to := malloc(num_chars + 1)
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if str_to != 0 {
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C.WideCharToMultiByte(cp_utf8, 0, _wstr, len, charptr(str_to), num_chars,
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0, 0)
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C.memset(str_to + num_chars, 0, 1)
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}
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return tos2(str_to)
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}
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} $else {
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return ''
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}
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}
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// Reads an utf8 character from standard input
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pub fn utf8_getchar() int {
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c := C.getchar()
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len := utf8_len(byte(~c))
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if c < 0 {
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return 0
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} else if len == 0 {
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return c
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} else if len == 1 {
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return -1
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} else {
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mut uc := c & ((1 << (7 - len)) - 1)
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for i := 0; i + 1 < len; i++ {
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c2 := C.getchar()
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if c2 != -1 && (c2 >> 6) == 2 {
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uc <<= 6
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uc |= (c2 & 63)
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} else if c2 == -1 {
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return 0
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} else {
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return -1
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}
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}
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return uc
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}
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}
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