зеркало из https://github.com/mozilla/gecko-dev.git
144 строки
2.4 KiB
C
144 строки
2.4 KiB
C
char rcsid_delta[] = "$Id: delta.c,v 1.1 1998/12/17 06:36:46 fur%netscape.com Exp $";
|
|
|
|
#include <stdio.h>
|
|
#include "b.h"
|
|
#include "fe.h"
|
|
|
|
int principleCost = 0;
|
|
int lexical = 0;
|
|
|
|
#ifndef NOLEX
|
|
void
|
|
ASSIGNCOST(l, r) DeltaPtr l; DeltaPtr r;
|
|
{
|
|
int i;
|
|
|
|
if (lexical) {
|
|
for (i = 0; i < DELTAWIDTH; i++) {
|
|
l[i] = r[i];
|
|
}
|
|
} else {
|
|
l[0] = r[0];
|
|
}
|
|
}
|
|
|
|
void
|
|
ADDCOST(l, r) DeltaPtr l; DeltaPtr r;
|
|
{
|
|
int i;
|
|
|
|
if (lexical) {
|
|
for (i = 0; i < DELTAWIDTH; i++) {
|
|
l[i] += r[i];
|
|
}
|
|
} else {
|
|
l[0] += r[0];
|
|
}
|
|
}
|
|
|
|
void
|
|
MINUSCOST(l, r) DeltaPtr l; DeltaPtr r;
|
|
{
|
|
int i;
|
|
|
|
if (lexical) {
|
|
for (i = 0; i < DELTAWIDTH; i++) {
|
|
l[i] -= r[i];
|
|
}
|
|
} else {
|
|
l[0] -= r[0];
|
|
}
|
|
}
|
|
|
|
void
|
|
ZEROCOST(x) DeltaPtr x;
|
|
{
|
|
int i;
|
|
|
|
if (lexical) {
|
|
for (i = 0; i < DELTAWIDTH; i++) {
|
|
x[i] = 0;
|
|
}
|
|
} else {
|
|
x[0] = 0;
|
|
}
|
|
}
|
|
|
|
int
|
|
LESSCOST(l, r) DeltaPtr l; DeltaPtr r;
|
|
{
|
|
int i;
|
|
|
|
if (lexical) {
|
|
for (i = 0; i < DELTAWIDTH; i++) {
|
|
if (l[i] < r[i]) {
|
|
return 1;
|
|
} else if (l[i] > r[i]) {
|
|
return 0;
|
|
}
|
|
}
|
|
return 0;
|
|
} else {
|
|
return l[0] < r[0];
|
|
}
|
|
}
|
|
|
|
int
|
|
EQUALCOST(l, r) DeltaPtr l; DeltaPtr r;
|
|
{
|
|
int i;
|
|
|
|
if (lexical) {
|
|
for (i = 0; i < DELTAWIDTH; i++) {
|
|
if (l[i] != r[i]) {
|
|
return 0;
|
|
}
|
|
}
|
|
return 1;
|
|
} else {
|
|
return l[0] == r[0];
|
|
}
|
|
}
|
|
#endif /* NOLEX */
|
|
|
|
void
|
|
CHECKDIVERGE(c, its, nt, base) DeltaPtr c; Item_Set its; int nt; int base;
|
|
{
|
|
int i;
|
|
|
|
if (prevent_divergence <= 0) {
|
|
return;
|
|
}
|
|
if (lexical) {
|
|
#ifndef NOLEX
|
|
for (i = 0; i < DELTAWIDTH; i++) {
|
|
if (c[i] > prevent_divergence) {
|
|
char ntname[100];
|
|
char basename[100];
|
|
nonTerminalName(ntname, nt);
|
|
nonTerminalName(basename, base);
|
|
fprintf(stderr, "ERROR: The grammar appears to diverge\n");
|
|
fprintf(stderr, "\tRelative Costs: %s(0), %s(%d)\n", basename, ntname, c[i]);
|
|
fprintf(stderr, "\tOffending Operator: %s\n", its->op->name);
|
|
fprintf(stderr, "\tOffending Tree: ");
|
|
printRepresentative(stderr, its);
|
|
fprintf(stderr, "\n");
|
|
exit(1);
|
|
}
|
|
}
|
|
#endif /*NOLEX*/
|
|
} else if (PRINCIPLECOST(c) > prevent_divergence) {
|
|
char ntname[100];
|
|
char basename[100];
|
|
nonTerminalName(ntname, nt);
|
|
nonTerminalName(basename, base);
|
|
fprintf(stderr, "ERROR: The grammar appears to diverge\n");
|
|
fprintf(stderr, "\tRelative Costs: %s(0), %s(%d)\n", basename, ntname, PRINCIPLECOST(c));
|
|
fprintf(stderr, "\tOffending Operator: %s\n", its->op->name);
|
|
fprintf(stderr, "\tOffending Tree: ");
|
|
printRepresentative(stderr, its);
|
|
fprintf(stderr, "\n");
|
|
exit(1);
|
|
}
|
|
}
|