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Diffstat (limited to 'extra/config/expr.c')
-rw-r--r--extra/config/expr.c92
1 files changed, 77 insertions, 15 deletions
diff --git a/extra/config/expr.c b/extra/config/expr.c
index 579ece4fa..d6626521f 100644
--- a/extra/config/expr.c
+++ b/extra/config/expr.c
@@ -7,15 +7,13 @@
#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;
@@ -23,8 +21,7 @@ struct expr *expr_alloc_symbol(struct symbol *sym)
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;
@@ -32,8 +29,7 @@ struct expr *expr_alloc_one(enum expr_type type, struct expr *ce)
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;
@@ -42,8 +38,7 @@ struct expr *expr_alloc_two(enum expr_type type, struct expr *e1, struct expr *e
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;
@@ -64,14 +59,14 @@ struct expr *expr_alloc_or(struct expr *e1, struct expr *e2)
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:
@@ -348,7 +343,7 @@ struct expr *expr_trans_bool(struct expr *e)
/*
* 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;
@@ -412,7 +407,7 @@ struct expr *expr_join_or(struct expr *e1, struct expr *e2)
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;
@@ -1013,6 +1008,48 @@ int expr_compare_type(enum expr_type t1, enum expr_type t2)
#endif
}
+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) {
@@ -1087,7 +1124,7 @@ void expr_print(struct expr *e, void (*fn)(void *, struct symbol *, const char *
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)
@@ -1097,7 +1134,32 @@ void expr_fprint(struct expr *e, FILE *out)
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)