+// The extra_token parameter specifies how to convert multiple values
+// into additional tokens. For '#', additional values get pushed as
+// SCM_IDENTIFIER. For '$', they get checked for their type and get
+// pushed as a corresponding *_IDENTIFIER token. Since the latter
+// tampers with yylval, it can only be done from the lexer itself, so
+// this function is private.
+
+SCM
+Lily_lexer::eval_scm (SCM readerdata, Input hi, char extra_token)
+{
+ SCM sval = SCM_UNDEFINED;
+
+ if (!SCM_UNBNDP (readerdata))
+ {
+ sval = ly_eval_scm (readerdata,
+ hi,
+ be_safe_global && is_main_input_,
+ parser_);
+ }
+
+ if (SCM_UNBNDP (sval))
+ {
+ error_level_ = 1;
+ return SCM_UNSPECIFIED;
+ }
+
+ if (extra_token && SCM_VALUESP (sval))
+ {
+ sval = scm_struct_ref (sval, SCM_INUM0);
+
+ if (scm_is_pair (sval)) {
+ for (SCM p = scm_reverse (scm_cdr (sval));
+ scm_is_pair (p);
+ p = scm_cdr (p))
+ {
+ SCM v = scm_car (p);
+ if (Music *m = unsmob<Music> (v))
+ {
+ if (!unsmob<Input> (m->get_property ("origin")))
+ m->set_spot (override_input (here_input ()));
+ }
+
+ int token;
+ switch (extra_token) {
+ case '$':
+ token = scan_scm_id (v);
+ if (!scm_is_eq (yylval, SCM_UNSPECIFIED))
+ push_extra_token (here_input (),
+ token, yylval);
+ break;
+ case '#':
+ push_extra_token (here_input (),
+ SCM_IDENTIFIER, v);
+ break;
+ }
+ }
+ sval = scm_car (sval);
+ } else
+ sval = SCM_UNSPECIFIED;
+ }
+
+ if (Music *m = unsmob<Music> (sval))
+ {
+ if (!unsmob<Input> (m->get_property ("origin")))
+ m->set_spot (override_input (here_input ()));
+ }
+
+ return sval;
+}
+
+/* Check for valid UTF-8 that has no overlong or surrogate codes and
+ is in the range 0-0x10ffff */
+
+const char *
+Lily_lexer::YYText_utf8 ()
+{
+ const char * const p = YYText ();
+ for (int i=0; p[i];) {
+ if ((p[i] & 0xff) < 0x80) {
+ ++i;
+ continue;
+ }
+ int oldi = i; // start of character
+ int more = 0; // # of followup bytes, 0 if bad
+ switch (p[i++] & 0xff) {
+ // 0xc0 and 0xc1 are overlong prefixes for
+ // 0x00-0x3f and 0x40-0x7f respectively, bad.
+ case 0xc2: // 0x80-0xbf
+ case 0xc3: // 0xc0-0xff
+ case 0xc4: // 0x100-0x13f
+ case 0xc5: // 0x140-0x17f
+ case 0xc6: // 0x180-0x1bf
+ case 0xc7: // 0x1c0-0x1ff
+ case 0xc8: // 0x200-0x23f
+ case 0xc9: // 0x240-0x27f
+ case 0xca: // 0x280-0x2bf
+ case 0xcb: // 0x2c0-0x2ff
+ case 0xcc: // 0x300-0x33f
+ case 0xcd: // 0x340-0x37f
+ case 0xce: // 0x380-0x3bf
+ case 0xcf: // 0x3c0-0x3ff
+ case 0xd0: // 0x400-0x43f
+ case 0xd1: // 0x440-0x47f
+ case 0xd2: // 0x480-0x4bf
+ case 0xd3: // 0x4c0-0x4ff
+ case 0xd4: // 0x500-0x53f
+ case 0xd5: // 0x540-0x57f
+ case 0xd6: // 0x580-0x5bf
+ case 0xd7: // 0x5c0-0x5ff
+ case 0xd8: // 0x600-0x63f
+ case 0xd9: // 0x640-0x67f
+ case 0xda: // 0x680-0x6bf
+ case 0xdb: // 0x6c0-0x6ff
+ case 0xdc: // 0x700-0x73f
+ case 0xdd: // 0x740-0x77f
+ case 0xde: // 0x780-0x7bf
+ case 0xdf: // 0x7c0-0x7ff
+ more = 1; // 2-byte sequences, 0x80-0x7ff
+ break;
+ case 0xe0:
+ // don't allow overlong sequences for 0-0x7ff
+ if ((p[i] & 0xff) < 0xa0)
+ break;
+ case 0xe1: // 0x1000-0x1fff
+ case 0xe2: // 0x2000-0x2fff
+ case 0xe3: // 0x3000-0x3fff
+ case 0xe4: // 0x4000-0x4fff
+ case 0xe5: // 0x5000-0x5fff
+ case 0xe6: // 0x6000-0x6fff
+ case 0xe7: // 0x7000-0x7fff
+ case 0xe8: // 0x8000-0x8fff
+ case 0xe9: // 0x9000-0x9fff
+ case 0xea: // 0xa000-0xafff
+ case 0xeb: // 0xb000-0xbfff
+ case 0xec: // 0xc000-0xcfff
+ more = 2; // 3-byte sequences, 0x7ff-0xcfff
+ break;
+ case 0xed: // 0xd000-0xdfff
+ // Don't allow surrogate codes 0xd800-0xdfff
+ if ((p[i] & 0xff) >= 0xa0)
+ break;
+ case 0xee: // 0xe000-0xefff
+ case 0xef: // 0xf000-0xffff
+ more = 2; // 3-byte sequences,
+ // 0xd000-0xd7ff, 0xe000-0xffff
+ break;
+ case 0xf0:
+ // don't allow overlong sequences for 0-0xffff
+ if ((p[i] & 0xff) < 0x90)
+ break;
+ case 0xf1: // 0x40000-0x7ffff
+ case 0xf2: // 0x80000-0xbffff
+ case 0xf3: // 0xc0000-0xfffff
+ more = 3; // 4-byte sequences, 0x10000-0xfffff
+ break;
+ case 0xf4:
+ // don't allow more than 0x10ffff
+ if ((p[i] & 0xff) >= 0x90)
+ break;
+ more = 3; // 4-byte sequence, 0x100000-0x10ffff
+ break;
+ }
+ if (more) {
+ // check that all continuation bytes are valid
+ do {
+ if ((p[i++] & 0xc0) != 0x80)
+ break;
+ } while (--more);
+ if (!more)
+ continue;
+ }
+ Input h = here_input ();
+ h.set (h.get_source_file (), h.start () + oldi, h.start () + i);
+ h.warning (_ ("non-UTF-8 input").c_str ());
+ }
+ return p;
+}
+
+
projects / lilypond.git / blobdiff