Mirrors_Framework/mujs
1
0
Fork 0
mirror of https://github.com/ccxvii/mujs.git synced 2026-09-21 14:43:34 +08:00
Code Issues Actions Packages Projects Releases Wiki Activity

Support line continuation escapes in string literals.

Browse Source
This commit is contained in:
Tor Andersson
2014-01-02 14:00:31 +01:00
parent 429d7cdce9
commit bc914e674b
1 changed files with 38 additions and 26 deletions
Download Patch File Download Diff File Expand all files Collapse all files
js-lex.c
+38 -26
View File
@@ -230,34 +230,43 @@ static inline int lexnumber(js_State *J, const char **sp)
return TK_NUMBER;
}
static inline int lexescape(const char **sp)
static inline int lexescape(js_State *J, const char **sp)
{
int c = GET();
int x = 0;
switch (c) {
case '0': return 0;
case 'u':
if (!ishex(PEEK())) return x; else x |= NEXTPEEK() << 12;
if (!ishex(PEEK())) return x; else x |= NEXTPEEK() << 8;
if (!ishex(PEEK())) return x; else x |= NEXTPEEK() << 4;
if (!ishex(PEEK())) return x; else x |= NEXTPEEK();
return x;
case 'x':
if (!ishex(PEEK())) return x; else x |= NEXTPEEK() << 4;
if (!ishex(PEEK())) return x; else x |= NEXTPEEK();
return x;
case '\'': return '\'';
case '"': return '"';
case '\\': return '\\';
case 'b': return '\b';
case 'f': return '\f';
case 'n': return '\n';
case 'r': return '\r';
case 't': return '\t';
case 'v': return '\v';
default: return c;
if (isnewline(c)) {
if (c == '\r' && PEEK() == '\n')
NEXT();
return 0;
}
switch (c) {
case 'u':
if (!ishex(PEEK())) return 1; else x |= NEXTPEEK() << 12;
if (!ishex(PEEK())) return 1; else x |= NEXTPEEK() << 8;
if (!ishex(PEEK())) return 1; else x |= NEXTPEEK() << 4;
if (!ishex(PEEK())) return 1; else x |= NEXTPEEK();
textpush(J, x);
break;
case 'x':
if (!ishex(PEEK())) return 1; else x |= NEXTPEEK() << 4;
if (!ishex(PEEK())) return 1; else x |= NEXTPEEK();
textpush(J, x);
break;
case '0': textpush(J, 0); break;
case '\\': textpush(J, '\\'); break;
case '\'': textpush(J, '\''); break;
case '"': textpush(J, '"'); break;
case 'b': textpush(J, '\b'); break;
case 'f': textpush(J, '\f'); break;
case 'n': textpush(J, '\n'); break;
case 'r': textpush(J, '\r'); break;
case 't': textpush(J, '\t'); break;
case 'v': textpush(J, '\v'); break;
default: textpush(J, c); break;
}
return 0;
}
static inline int lexstring(js_State *J, const char **sp, int q)
@@ -269,9 +278,12 @@ static inline int lexstring(js_State *J, const char **sp, int q)
while (c != q) {
if (c == 0 || isnewline(c))
return syntaxerror(J, "string not terminated");
if (c == '\\')
c = lexescape(sp);
textpush(J, c);
if (c == '\\') {
if (lexescape(J, sp))
return syntaxerror(J, "malformed escape sequence");
} else {
textpush(J, c);
}
c = GET();
}