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Verify bounds for linked lists

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NHOrus 2017-08-24 13:47:57 +03:00
parent 5e39abf730
commit 25424a01db
2 changed files with 9 additions and 4 deletions
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2
advent.h
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@ -165,7 +165,7 @@ struct game_t {
loc_t dloc[NDWARVES + 1]; // location of dwarves, initially hard-wired in
loc_t odloc[NDWARVES + 1]; // prior loc of each dwarf, initially garbage
loc_t fixed[NOBJECTS + 1]; // fixed location of object (if not IS_FREE)
long link[NOBJECTS * 2 + 1]; // object-list links
obj_t link[NOBJECTS * 2 + 1]; // object-list links
loc_t place[NOBJECTS + 1]; // location of object
long hinted[NHINTS]; // hinted[i] = true iff hint i has been used.
long hintlc[NHINTS]; // hintlc[i] = how long at LOC with cond bit i

11
saveresume.c
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@ -185,7 +185,7 @@ bool is_valid(struct game_t valgame)
}
/* Check that properties of objects aren't beyond expected */
for (int obj = 0; obj <= NOBJECTS; obj++) {
for (obj_t obj = 0; obj <= NOBJECTS; obj++) {
if (valgame.prop[obj] < STATE_NOTFOUND || valgame.prop[obj] > 1) {
switch (obj) {
case RUG:
@ -210,9 +210,14 @@ bool is_valid(struct game_t valgame)
}
}
/* Check that we have objects at locations */
/* Check that values in linked lists for objects in locations are inside bounds */
for (loc_t loc = LOC_NOWHERE; loc <= NLOCATIONS; loc++) {
if (valgame.atloc[loc] < NO_OBJECT || valgame.atloc[loc] > NOBJECTS * 2 + 1) {
if (valgame.atloc[loc] < NO_OBJECT || valgame.atloc[loc] > NOBJECTS * 2) {
return false;
}
}
for (obj_t obj = 0; obj <= NOBJECTS * 2; obj++ ) {
if (valgame.link[obj] < NO_OBJECT || valgame.link[obj] > NOBJECTS * 2) {
return false;
}
}