#include <stdlib.h>
#include <string.h>
-#define LKC_DIRECT_LINK
#include "lkc.h"
#define DEBUG_EXPR 0
struct expr *expr_alloc_symbol(struct symbol *sym)
{
- struct expr *e = malloc(sizeof(*e));
- memset(e, 0, sizeof(*e));
+ struct expr *e = xcalloc(1, sizeof(*e));
e->type = E_SYMBOL;
e->left.sym = sym;
return e;
struct expr *expr_alloc_one(enum expr_type type, struct expr *ce)
{
- struct expr *e = malloc(sizeof(*e));
- memset(e, 0, sizeof(*e));
+ struct expr *e = xcalloc(1, sizeof(*e));
e->type = type;
e->left.expr = ce;
return e;
struct expr *expr_alloc_two(enum expr_type type, struct expr *e1, struct expr *e2)
{
- struct expr *e = malloc(sizeof(*e));
- memset(e, 0, sizeof(*e));
+ struct expr *e = xcalloc(1, sizeof(*e));
e->type = type;
e->left.expr = e1;
e->right.expr = e2;
struct expr *expr_alloc_comp(enum expr_type type, struct symbol *s1, struct symbol *s2)
{
- struct expr *e = malloc(sizeof(*e));
- memset(e, 0, sizeof(*e));
+ struct expr *e = xcalloc(1, sizeof(*e));
e->type = type;
e->left.sym = s1;
e->right.sym = s2;
return e2 ? expr_alloc_two(E_OR, e1, e2) : e1;
}
-struct expr *expr_copy(struct expr *org)
+struct expr *expr_copy(const struct expr *org)
{
struct expr *e;
if (!org)
return NULL;
- e = malloc(sizeof(*org));
+ e = xmalloc(sizeof(*org));
memcpy(e, org, sizeof(*org));
switch (org->type) {
case E_SYMBOL:
break;
case E_AND:
case E_OR:
- case E_CHOICE:
+ case E_LIST:
e->left.expr = expr_copy(org->left.expr);
e->right.expr = expr_copy(org->right.expr);
break;
return;
}
if (e1->type == E_SYMBOL && e2->type == E_SYMBOL &&
- e1->left.sym == e2->left.sym && (e1->left.sym->flags & (SYMBOL_YES|SYMBOL_NO)))
+ e1->left.sym == e2->left.sym &&
+ (e1->left.sym == &symbol_yes || e1->left.sym == &symbol_no))
return;
if (!expr_eq(e1, e2))
return;
expr_free(e2);
trans_count = old_count;
return res;
- case E_CHOICE:
+ case E_LIST:
case E_RANGE:
case E_NONE:
/* panic */;
/*
* e1 || e2 -> ?
*/
-struct expr *expr_join_or(struct expr *e1, struct expr *e2)
+static struct expr *expr_join_or(struct expr *e1, struct expr *e2)
{
struct expr *tmp;
struct symbol *sym1, *sym2;
return NULL;
}
-struct expr *expr_join_and(struct expr *e1, struct expr *e2)
+static struct expr *expr_join_and(struct expr *e1, struct expr *e2)
{
struct expr *tmp;
struct symbol *sym1, *sym2;
case E_EQUAL:
case E_UNEQUAL:
case E_SYMBOL:
- case E_CHOICE:
+ case E_LIST:
break;
default:
e->left.expr = expr_transform(e->left.expr);
break;
case E_SYMBOL:
return expr_alloc_comp(type, e->left.sym, sym);
- case E_CHOICE:
+ case E_LIST:
case E_RANGE:
case E_NONE:
/* panic */;
case E_AND:
val1 = expr_calc_value(e->left.expr);
val2 = expr_calc_value(e->right.expr);
- return E_AND(val1, val2);
+ return EXPR_AND(val1, val2);
case E_OR:
val1 = expr_calc_value(e->left.expr);
val2 = expr_calc_value(e->right.expr);
- return E_OR(val1, val2);
+ return EXPR_OR(val1, val2);
case E_NOT:
val1 = expr_calc_value(e->left.expr);
- return E_NOT(val1);
+ return EXPR_NOT(val1);
case E_EQUAL:
sym_calc_value(e->left.sym);
sym_calc_value(e->right.sym);
if (t2 == E_OR)
return 1;
case E_OR:
- if (t2 == E_CHOICE)
+ if (t2 == E_LIST)
return 1;
- case E_CHOICE:
+ case E_LIST:
if (t2 == 0)
return 1;
default:
#endif
}
-void expr_print(struct expr *e, void (*fn)(void *, const char *), void *data, int prevtoken)
+static inline struct expr *
+expr_get_leftmost_symbol(const struct expr *e)
+{
+
+ if (e == NULL)
+ return NULL;
+
+ while (e->type != E_SYMBOL)
+ e = e->left.expr;
+
+ return expr_copy(e);
+}
+
+/*
+ * Given expression `e1' and `e2', returns the leaf of the longest
+ * sub-expression of `e1' not containing 'e2.
+ */
+struct expr *expr_simplify_unmet_dep(struct expr *e1, struct expr *e2)
+{
+ struct expr *ret;
+
+ switch (e1->type) {
+ case E_OR:
+ return expr_alloc_and(
+ expr_simplify_unmet_dep(e1->left.expr, e2),
+ expr_simplify_unmet_dep(e1->right.expr, e2));
+ case E_AND: {
+ struct expr *e;
+ e = expr_alloc_and(expr_copy(e1), expr_copy(e2));
+ e = expr_eliminate_dups(e);
+ ret = (!expr_eq(e, e1)) ? e1 : NULL;
+ expr_free(e);
+ break;
+ }
+ default:
+ ret = e1;
+ break;
+ }
+
+ return expr_get_leftmost_symbol(ret);
+}
+
+void expr_print(struct expr *e, void (*fn)(void *, struct symbol *, const char *), void *data, int prevtoken)
{
if (!e) {
- fn(data, "y");
+ fn(data, NULL, "y");
return;
}
if (expr_compare_type(prevtoken, e->type) > 0)
- fn(data, "(");
+ fn(data, NULL, "(");
switch (e->type) {
case E_SYMBOL:
if (e->left.sym->name)
- fn(data, e->left.sym->name);
+ fn(data, e->left.sym, e->left.sym->name);
else
- fn(data, "<choice>");
+ fn(data, NULL, "<choice>");
break;
case E_NOT:
- fn(data, "!");
+ fn(data, NULL, "!");
expr_print(e->left.expr, fn, data, E_NOT);
break;
case E_EQUAL:
- fn(data, e->left.sym->name);
- fn(data, "=");
- fn(data, e->right.sym->name);
+ if (e->left.sym->name)
+ fn(data, e->left.sym, e->left.sym->name);
+ else
+ fn(data, NULL, "<choice>");
+ fn(data, NULL, "=");
+ fn(data, e->right.sym, e->right.sym->name);
break;
case E_UNEQUAL:
- fn(data, e->left.sym->name);
- fn(data, "!=");
- fn(data, e->right.sym->name);
+ if (e->left.sym->name)
+ fn(data, e->left.sym, e->left.sym->name);
+ else
+ fn(data, NULL, "<choice>");
+ fn(data, NULL, "!=");
+ fn(data, e->right.sym, e->right.sym->name);
break;
case E_OR:
expr_print(e->left.expr, fn, data, E_OR);
- fn(data, " || ");
+ fn(data, NULL, " || ");
expr_print(e->right.expr, fn, data, E_OR);
break;
case E_AND:
expr_print(e->left.expr, fn, data, E_AND);
- fn(data, " && ");
+ fn(data, NULL, " && ");
expr_print(e->right.expr, fn, data, E_AND);
break;
- case E_CHOICE:
- fn(data, e->right.sym->name);
+ case E_LIST:
+ fn(data, e->right.sym, e->right.sym->name);
if (e->left.expr) {
- fn(data, " ^ ");
- expr_print(e->left.expr, fn, data, E_CHOICE);
+ fn(data, NULL, " ^ ");
+ expr_print(e->left.expr, fn, data, E_LIST);
}
break;
case E_RANGE:
- fn(data, "[");
- fn(data, e->left.sym->name);
- fn(data, " ");
- fn(data, e->right.sym->name);
- fn(data, "]");
+ fn(data, NULL, "[");
+ fn(data, e->left.sym, e->left.sym->name);
+ fn(data, NULL, " ");
+ fn(data, e->right.sym, e->right.sym->name);
+ fn(data, NULL, "]");
break;
default:
{
char buf[32];
sprintf(buf, "<unknown type %d>", e->type);
- fn(data, buf);
+ fn(data, NULL, buf);
break;
}
}
if (expr_compare_type(prevtoken, e->type) > 0)
- fn(data, ")");
+ fn(data, NULL, ")");
}
-static void expr_print_file_helper(void *data, const char *str)
+static void expr_print_file_helper(void *data, struct symbol *sym, const char *str)
{
- fwrite(str, strlen(str), 1, data);
+ xfwrite(str, strlen(str), 1, data);
}
void expr_fprint(struct expr *e, FILE *out)
expr_print(e, expr_print_file_helper, out, E_NONE);
}
-static void expr_print_gstr_helper(void *data, const char *str)
+static void expr_print_gstr_helper(void *data, struct symbol *sym, const char *str)
{
- str_append((struct gstr*)data, str);
+ struct gstr *gs = (struct gstr*)data;
+ const char *sym_str = NULL;
+
+ if (sym)
+ sym_str = sym_get_string_value(sym);
+
+ if (gs->max_width) {
+ unsigned extra_length = strlen(str);
+ const char *last_cr = strrchr(gs->s, '\n');
+ unsigned last_line_length;
+
+ if (sym_str)
+ extra_length += 4 + strlen(sym_str);
+
+ if (!last_cr)
+ last_cr = gs->s;
+
+ last_line_length = strlen(gs->s) - (last_cr - gs->s);
+
+ if ((last_line_length + extra_length) > gs->max_width)
+ str_append(gs, "\\\n");
+ }
+
+ str_append(gs, str);
+ if (sym && sym->type != S_UNKNOWN)
+ str_printf(gs, " [=%s]", sym_str);
}
void expr_gstr_print(struct expr *e, struct gstr *gs)
projects / openwrt / openwrt.git / blobdiff