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Revert "removed bits C code inside utf8 builtin" 

This reverts commit f6a401aa02.
pull/691/head
Alexander Medvednikov 2019-06-27 02:12:28 +02:00
parent bda50e96f0
commit b9011804fc
1 changed files with 63 additions and 53 deletions
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116
builtin/utf8.v
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@ -251,63 +251,71 @@ fn (s string) runes() []string {
// Convert utf32 to utf8
// utf32 == Codepoint
fn utf32_to_str(code u32) string {
icode := int(code) //Prevents doing casts everywhere
mut buffer := malloc(5)
if icode <= 127 /* 0x7F */ {
buffer[0] = icode
return tos(buffer, 1)
}
if (icode <= 2047 /* 0x7FF */) {
buffer[0] = 192 /*0xC0*/ | (icode >> 6) /* 110xxxxx */
buffer[1] = 128 /*0x80*/ | (icode & 63 /*0x3F*/) /* 10xxxxxx */
return tos(buffer, 2)
}
if (icode <= 65535 /* 0xFFFF */) {
buffer[0] = 224 /*0xE0*/ | (icode >> 12) /* 1110xxxx */
buffer[1] = 128 /*0x80*/ | ((icode >> 6) & 63 /*0x3F*/) /* 10xxxxxx */
buffer[2] = 128 /*0x80*/ | (icode & 63 /*0x3F*/) /* 10xxxxxx */
return tos(buffer, 3)
}
if (icode <= 1114111 /* 0x10FFFF */) {
buffer[0] = 240 /*0xF0*/ | (icode >> 18) /* 11110xxx */
buffer[1] = 128 /*0x80*/ | ((icode >> 12) & 63 /*0x3F*/) /* 10xxxxxx */
buffer[2] = 128 /*0x80*/ | ((icode >> 6) & 63 /*0x3F*/) /* 10xxxxxx */
buffer[3] = 128 /*0x80*/ | (icode & 63 /*0x3F*/) /* 10xxxxxx */
return tos(buffer, 4)
}
// println('code = $code')
buffer := malloc(5)
# if (code <= 0x7F) {
// println('!!!!!!!1')
# buffer[0] = code;
# return tos(buffer, 1);
# }
# if (code <= 0x7FF) {
// println('!!!!!!!2')
# buffer[0] = 0xC0 | (code >> 6); /* 110xxxxx */
# buffer[1] = 0x80 | (code & 0x3F); /* 10xxxxxx */
# return tos(buffer, 2);
# }
# if (code <= 0xFFFF) {
// println('!!!!!!!3')
# buffer[0] = 0xE0 | (code >> 12); /* 1110xxxx */
# buffer[1] = 0x80 | ((code >> 6) & 0x3F); /* 10xxxxxx */
# buffer[2] = 0x80 | (code & 0x3F); /* 10xxxxxx */
# return tos(buffer, 3);
# }
# if (code <= 0x10FFFF) {
# buffer[0] = 0xF0 | (code >> 18); /* 11110xxx */
# buffer[1] = 0x80 | ((code >> 12) & 0x3F); /* 10xxxxxx */
# buffer[2] = 0x80 | ((code >> 6) & 0x3F); /* 10xxxxxx */
# buffer[3] = 0x80 | (code & 0x3F); /* 10xxxxxx */
# return tos(buffer, 4);
# }
return ''
}
// TODO copypasta
fn utf32_to_str_no_malloc(code u32, buffer byteptr) string {
icode := int(code) //Prevents doing casts everywhere
if icode <= 127 /* 0x7F */ {
buffer[0] = icode
return tos(buffer, 1)
}
if (icode <= 2047 /* 0x7FF */) {
buffer[0] = 192 /*0xC0*/ | (icode >> 6) /* 110xxxxx */
buffer[1] = 128 /*0x80*/ | (icode & 63 /*0x3F*/) /* 10xxxxxx */
return tos(buffer, 2)
}
if (icode <= 65535 /* 0xFFFF */) {
buffer[0] = 224 /*0xE0*/ | (icode >> 12) /* 1110xxxx */
buffer[1] = 128 /*0x80*/ | ((icode >> 6) & 63 /*0x3F*/) /* 10xxxxxx */
buffer[2] = 128 /*0x80*/ | (icode & 63 /*0x3F*/) /* 10xxxxxx */
return tos(buffer, 3)
}
if (icode <= 1114111 /* 0x10FFFF */) {
buffer[0] = 240 /*0xF0*/ | (icode >> 18) /* 11110xxx */
buffer[1] = 128 /*0x80*/ | ((icode >> 12) & 63 /*0x3F*/) /* 10xxxxxx */
buffer[2] = 128 /*0x80*/ | ((icode >> 6) & 63 /*0x3F*/) /* 10xxxxxx */
buffer[3] = 128 /*0x80*/ | (icode & 63 /*0x3F*/) /* 10xxxxxx */
return tos(buffer, 4)
}
fn utf32_to_str_no_malloc(code u32, buf voidptr) string {
// println('code = $code')
# char* buffer = buf;
# if (code <= 0x7F) {
// println('!!!!!!!1')
# buffer[0] = code;
# return tos(buffer, 1);
# }
# if (code <= 0x7FF) {
// println('!!!!!!!2')
# buffer[0] = 0xC0 | (code >> 6); /* 110xxxxx */
# buffer[1] = 0x80 | (code & 0x3F); /* 10xxxxxx */
# return tos(buffer, 2);
# }
# if (code <= 0xFFFF) {
// println('!!!!!!!3')
# buffer[0] = 0xE0 | (code >> 12); /* 1110xxxx */
# buffer[1] = 0x80 | ((code >> 6) & 0x3F); /* 10xxxxxx */
# buffer[2] = 0x80 | (code & 0x3F); /* 10xxxxxx */
# return tos(buffer, 3);
# }
# if (code <= 0x10FFFF) {
# buffer[0] = 0xF0 | (code >> 18); /* 11110xxx */
# buffer[1] = 0x80 | ((code >> 12) & 0x3F); /* 10xxxxxx */
# buffer[2] = 0x80 | ((code >> 6) & 0x3F); /* 10xxxxxx */
# buffer[3] = 0x80 | (code & 0x3F); /* 10xxxxxx */
# return tos(buffer, 4);
# }
return ''
}
// Convert utf8 to utf32
fn (_rune string) utf32_code() int {
// println('utf 32 of $rune len=$rune.len')
if _rune.len == 0 {
return 0
}
@ -315,18 +323,20 @@ fn (_rune string) utf32_code() int {
if _rune.len == 1 {
return int(_rune[0])
}
mut b := byte(int(_rune[0]))
b := byte(int(_rune[0]))
// TODO should be
// res := int( rune[0] << rune.len)
b <<= _rune.len
mut res := int(b)
# b <<= _rune.len;
res := int(b)
mut shift := 6 - _rune.len
for i := 1; i < _rune.len; i++ {
// println('c=$res')
c := int(_rune[i])
res <<= shift
res |= c & 63 /* 0x3f */
# res <<= shift;
# res |= c & 0x3f;
shift = 6
}
// println('!!!!!!!! utf32 $rune res = $res')
return res
}