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/* dctrl-tools - Debian control file inspection tools
Copyright © 2003, 2004, 2008, 2010, 2011, 2012 Antti-Juhani Kaijanaho
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include <ctype.h>
#include <stdlib.h>
#include <regex.h>
#include <string.h>
#include "atom.h"
#include "fsaf.h"
#include "msg.h"
#include "util.h"
#include "predicate.h"
#include "strutil.h"
#include "version.h"
typedef bool (*eval_t)(struct predicate *, para_t * para);
struct predicate_vtbl {
bool (*eval)(struct predicate *, para_t *);
void (*print)(struct predicate *, size_t indent);
};
struct predicate {
const struct predicate_vtbl *vtbl;
};
static void print(struct predicate *p, size_t indent)
{
p->vtbl->print(p, indent);
}
struct unary_predicate {
struct predicate super;
struct predicate *rand;
};
struct binary_predicate {
struct predicate super;
struct predicate *lrand;
struct predicate *rrand;
};
struct atomary_predicate {
struct predicate super;
struct atom *atom;
};
static bool eval_AND(struct predicate *base_p, para_t * para)
{
struct binary_predicate *p = (struct binary_predicate *)base_p;
if (!does_para_satisfy(p->lrand, para)) return false;
return does_para_satisfy(p->rrand, para);
}
static void print_AND(struct predicate *base_p, size_t indent)
{
struct binary_predicate *p = (struct binary_predicate *)base_p;
for (size_t i = 0; i < indent; i++) putchar(' ');
puts("AND");
print(p->lrand, indent+1);
print(p->rrand, indent+1);
}
static bool eval_OR(struct predicate *base_p, para_t * para)
{
struct binary_predicate *p = (struct binary_predicate *)base_p;
if (does_para_satisfy(p->lrand, para)) return true;
return does_para_satisfy(p->rrand, para);
}
static void print_OR(struct predicate *base_p, size_t indent)
{
struct binary_predicate *p = (struct binary_predicate *)base_p;
for (size_t i = 0; i < indent; i++) putchar(' ');
puts("OR");
print(p->lrand, indent+1);
print(p->rrand, indent+1);
}
static bool eval_NOT(struct predicate *base_p, para_t * para)
{
struct unary_predicate *p = (struct unary_predicate *)base_p;
return !does_para_satisfy(p->rand, para);
}
static void print_NOT(struct predicate *base_p, size_t indent)
{
struct unary_predicate *p = (struct unary_predicate *)base_p;
for (size_t i = 0; i < indent; i++) putchar(' ');
puts("NOT");
print(p->rand, indent+1);
}
static bool eval_ATOM(struct predicate *base_p, para_t * para)
{
struct atomary_predicate *p = (struct atomary_predicate *)base_p;
return atom_verify(p->atom, para);
}
static void print_ATOM(struct predicate *base_p, size_t indent)
{
struct atomary_predicate *p = (struct atomary_predicate *)base_p;
char ind[indent+1];
for (size_t i = 0; i < indent; i++) ind[i] = ' ';
ind[indent] = '\0';
printf("%sATOM", ind);
printf("%s field_name = %s\n", ind, p->atom->field_name);
printf("%s mode = %i\n", ind, p->atom->mode);
printf("%s ignore_case = %i\n", ind, p->atom->ignore_case);
printf("%s whole_pkg = %i\n", ind, p->atom->whole_pkg);
printf("%s pat = %s\n", ind, p->atom->pat);
}
struct predicate *binary_predicate(const struct predicate_vtbl *vtbl,
struct predicate *pl, struct predicate *pr){
struct binary_predicate *rv = malloc(sizeof *rv);
if (rv == 0) enomem(0);
rv->super.vtbl = vtbl;
rv->lrand= pl;
rv->rrand = pr;
return &rv->super;
}
struct predicate *predicate_AND(struct predicate *pl, struct predicate *pr)
{
static const struct predicate_vtbl vtbl =
{ .eval = eval_AND, .print = print_AND };
return binary_predicate(&vtbl, pl, pr);
}
struct predicate *predicate_OR(struct predicate *pl, struct predicate *pr)
{
static const struct predicate_vtbl vtbl =
{ .eval = eval_OR, .print = print_OR };
return binary_predicate(&vtbl, pl, pr);
}
struct predicate *predicate_NOT(struct predicate *p)
{
static const struct predicate_vtbl vtbl =
{ .eval = eval_NOT, .print = print_NOT };
struct unary_predicate *rv = malloc(sizeof *rv);
if (rv == 0) enomem(0);
rv->super.vtbl = &vtbl;
rv->rand = p;
return &rv->super;
}
struct predicate *predicate_ATOM(struct atom *at)
{
static const struct predicate_vtbl vtbl =
{ .eval = eval_ATOM, .print = print_ATOM };
struct atomary_predicate *rv = malloc(sizeof *rv);
if (rv == 0) enomem(0);
rv->super.vtbl = &vtbl;
rv->atom = at;
return &rv->super;
}
bool check_predicate(struct predicate * p __attribute__((unused)))
{
// static checking of predicate
// currently no operation
return true;
}
bool does_para_satisfy(struct predicate * p, para_t * para)
{
return p->vtbl->eval(p, para);
}
void predicate_print(struct predicate *p)
{
print(p, 0);
}
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