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Overview
| Comment: | Do not sort terminal symbols by name. The terminals remain in the same order that they are encountered in the grammar file. This results in parse tables that are 25% smaller. (CVS 1261) |
|---|---|
| Downloads: | Tarball | ZIP archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA1: |
f36b122d9767fa9e6dc5bcce04b5606d |
| User & Date: | drh 2004-02-22 00:08:05.000 |
Context
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2004-02-22
| ||
| 16:27 | Rearrange the grammar some so that tokens that are used together appear together in the grammar file. This reduces the size of the parser tables and some of the jump tables in switch statements. (CVS 1262) (check-in: d372c16ec6 user: drh tags: trunk) | |
| 00:08 | Do not sort terminal symbols by name. The terminals remain in the same order that they are encountered in the grammar file. This results in parse tables that are 25% smaller. (CVS 1261) (check-in: f36b122d97 user: drh tags: trunk) | |
|
2004-02-21
| ||
| 19:41 | Test cases for printf of double overflows. (CVS 1260) (check-in: 96a6d2d3ff user: drh tags: trunk) | |
Changes
Changes to tool/lemon.c.
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exit(1);
}
/* Count and index the symbols of the grammar */
lem.nsymbol = Symbol_count();
Symbol_new("{default}");
lem.symbols = Symbol_arrayof();
qsort(lem.symbols,lem.nsymbol+1,sizeof(struct symbol*),
(int(*)())Symbolcmpp);
for(i=0; i<=lem.nsymbol; i++) lem.symbols[i]->index = i;
for(i=1; isupper(lem.symbols[i]->name[0]); i++);
lem.nterminal = i;
/* Generate a reprint of the grammar, if requested on the command line */
| > | 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 |
exit(1);
}
/* Count and index the symbols of the grammar */
lem.nsymbol = Symbol_count();
Symbol_new("{default}");
lem.symbols = Symbol_arrayof();
for(i=0; i<=lem.nsymbol; i++) lem.symbols[i]->index = i;
qsort(lem.symbols,lem.nsymbol+1,sizeof(struct symbol*),
(int(*)())Symbolcmpp);
for(i=0; i<=lem.nsymbol; i++) lem.symbols[i]->index = i;
for(i=1; isupper(lem.symbols[i]->name[0]); i++);
lem.nterminal = i;
/* Generate a reprint of the grammar, if requested on the command line */
|
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sp->destructor = 0;
sp->datatype = 0;
Symbol_insert(sp,sp->name);
}
return sp;
}
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sp->destructor = 0;
sp->datatype = 0;
Symbol_insert(sp,sp->name);
}
return sp;
}
/* Compare two symbols for working purposes
**
** Symbols that begin with upper case letters (terminals or tokens)
** must sort before symbols that begin with lower case letters
** (non-terminals). Other than that, the order does not matter.
**
** We find experimentally that leaving the symbols in their original
** order (the order they appeared in the grammar file) gives the
** smallest parser tables in SQLite.
*/
int Symbolcmpp(struct symbol **a, struct symbol **b){
int i1 = (**a).index + 10000000*((**a).name[0]>'Z');
int i2 = (**b).index + 10000000*((**b).name[0]>'Z');
return i1-i2;
}
/* There is one instance of the following structure for each
** associative array of type "x2".
*/
struct s_x2 {
int size; /* The number of available slots. */
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