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lexer, vstr: Add unicode support.

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This commit is contained in:
Chris Angelico
2014-06-04 05:28:12 +10:00
committed by Paul Sokolovsky
parent 1e3781bc35
commit 2ba2299d28
2 changed files with 57 additions and 10 deletions
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38
py/vstr.c
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@@ -199,12 +199,40 @@ void vstr_add_byte(vstr_t *vstr, byte b) {
}
void vstr_add_char(vstr_t *vstr, unichar c) {
// TODO UNICODE
byte *buf = (byte*)vstr_add_len(vstr, 1);
if (buf == NULL) {
return;
// TODO: Can this be simplified and deduplicated?
// Is it worth just calling vstr_add_len(vstr, 4)?
if (c < 0x80) {
byte *buf = (byte*)vstr_add_len(vstr, 1);
if (buf == NULL) {
return;
}
*buf = (byte)c;
} else if (c < 0x800) {
byte *buf = (byte*)vstr_add_len(vstr, 2);
if (buf == NULL) {
return;
}
buf[0] = (c >> 6) | 0xC0;
buf[1] = (c & 0x3F) | 0x80;
} else if (c < 0x10000) {
byte *buf = (byte*)vstr_add_len(vstr, 3);
if (buf == NULL) {
return;
}
buf[0] = (c >> 12) | 0xE0;
buf[1] = ((c >> 6) & 0x3F) | 0x80;
buf[2] = (c & 0x3F) | 0x80;
} else {
assert(c < 0x110000);
byte *buf = (byte*)vstr_add_len(vstr, 4);
if (buf == NULL) {
return;
}
buf[0] = (c >> 18) | 0xF0;
buf[1] = ((c >> 12) & 0x3F) | 0x80;
buf[2] = ((c >> 6) & 0x3F) | 0x80;
buf[3] = (c & 0x3F) | 0x80;
}
buf[0] = c;
}
void vstr_add_str(vstr_t *vstr, const char *str) {