//
// Given the current command and line number, and number of lines back or foward, compute the new
// command and line number.
//
Histloc_t hist_locate(History_t *hp, int command, int line, int lines) {
Histloc_t next;
line += lines;
if (!hp) {
command = -1;
goto done;
}
if (lines > 0) {
int count;
while (command <= hp->histind) {
count = hist_copy(NULL, 0, command, -1);
if (count > line) goto done;
line -= count;
command++;
}
} else {
int least = (int)hp->histind - hp->histsize;
while (1) {
if (line >= 0) goto done;
if (--command < least) break;
line += hist_copy(NULL, 0, command, -1);
}
command = -1;
}
done:
next.hist_line = line;
next.hist_command = command;
next.hist_char = 0;
return next;
}
//
// Return word number <word> from command number <command>.
//
char *hist_word(char *string, int size, int word) {
int c;
char *s1 = string;
unsigned char *cp = (unsigned char *)s1;
int flag = 0;
History_t *hp = hist_ptr;
if (!hp) return NULL;
hist_copy(string, size, (int)hp->histind - 1, -1);
for (; (c = *cp); cp++) {
c = isspace(c);
if (c && flag) {
*cp = 0;
if (--word == 0) break;
flag = 0;
} else if (c == 0 && flag == 0) {
s1 = (char *)cp;
flag++;
}
}
*cp = 0;
// We can't use strcpy() because the two buffers may overlap.
if (s1 != string) memmove(string, s1, strlen(s1) + 1);
return string;
}
/**
* Add an entry with text `text` to the history list, with type `type`
* ("HIST_xxx" in player-history.h), and artifact number `id` (0 for
* everything else).
*
* Return true on success.
*/
bool history_add_full(struct player *p,
bitflag *type,
int aidx,
int dlev,
int clev,
int turnno,
const char *text)
{
struct player_history *h = &p->hist;
/* Allocate or expand the history list if needed */
if (!h->entries)
history_init(h);
else if (h->next == h->length)
history_realloc(h);
/* Add entry */
hist_copy(h->entries[h->next].type, type);
h->entries[h->next].dlev = dlev;
h->entries[h->next].clev = clev;
h->entries[h->next].a_idx = aidx;
h->entries[h->next].turn = turnno;
my_strcpy(h->entries[h->next].event,
text,
sizeof(h->entries[h->next].event));
h->next++;
return true;
}
/**
* Add an entry with text `event` to the history list, with type `type`
* ("HIST_xxx" in player-history.h), and artifact number `id` (0 for
* everything else).
*
* Return true on success.
*/
bool history_add_full(bitflag *type, struct artifact *artifact, s16b dlev,
s16b clev, s32b turnno, const char *text)
{
/* Allocate or expand the history list as needed */
if (!history_list)
history_init(HISTORY_BIRTH_SIZE);
else if ((history_ctr == history_size) &&
!history_set_num(history_size + 10))
return false;
/* History list exists and is not full. Add an entry at the current
* counter location. */
hist_copy(history_list[history_ctr].type, type);
history_list[history_ctr].dlev = dlev;
history_list[history_ctr].clev = clev;
history_list[history_ctr].a_idx = artifact ? artifact->aidx : 0;
history_list[history_ctr].turn = turnno;
my_strcpy(history_list[history_ctr].event,
text, sizeof(history_list[history_ctr].event));
history_ctr++;
return true;
}
