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fix reader error for bad surrogate-style encodings

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This commit is contained in:
Matthew Flatt 2015-11-04 14:03:19 -07:00
parent 42e5d9f5cf
commit c5f4740b31
1 changed files with 3 additions and 2 deletions
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5
racket/src/racket/src/read.c
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@ -3143,10 +3143,11 @@ read_string(int is_byte, Scheme_Object *port,
case 'U':
if (!is_byte) {
int maxc = ((ch == 'u') ? 4 : 8);
char initial[8];
char initial[9];
ch = scheme_getc_special_ok(port);
if (NOT_EOF_OR_SPECIAL(ch) && scheme_isxdigit(ch)) {
int count = 1;
initial[0] = ch;
n = ch<='9' ? ch-'0' : (scheme_toupper(ch)-'A'+10);
while (count < maxc) {
ch = scheme_peekc_special_ok(port);
@ -3158,6 +3159,7 @@ read_string(int is_byte, Scheme_Object *port,
} else
break;
}
initial[count] = 0;
if ((maxc == 4) && ((n >= 0xD800) && (n <= 0xDBFF))) {
/* Allow a surrogate-pair-like encoding, as long as
the next part is "\uD..." */
@ -3202,7 +3204,6 @@ read_string(int is_byte, Scheme_Object *port,
else if (NOT_EOF_OR_SPECIAL(ch))
snd[sndp++] = ch;
snd[sndp] = 0;
initial[4] = 0;
if (err_ok)
scheme_read_err(port, stxsrc, line, col, pos, SPAN(port, pos), ch, indentation,
"read: bad or incomplete surrogate-style encoding at `\\u%s%5'",