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#include "hiscore.hpp"
#include "util.hpp"
#include <cassert>
int highscore_seek(int highscore_fd, int i)
{
/* Seek for the requested record */
return (fd_seek(highscore_fd, (huge)(i) * sizeof(high_score)));
}
errr highscore_read(int highscore_fd, high_score *score)
{
/* Read the record, note failure */
return (fd_read(highscore_fd, (char*)(score), sizeof(high_score)));
}
int highscore_write(int highscore_fd, high_score *score)
{
/* Write the record, note failure */
return (fd_write(highscore_fd, (char*)(score), sizeof(high_score)));
}
int highscore_where(int highscore_fd, high_score *score)
{
int i;
high_score the_score;
/* Paranoia -- it may not have opened */
if (highscore_fd < 0) return ( -1);
/* Go to the start of the highscore file */
if (highscore_seek(highscore_fd, 0)) return ( -1);
/* Read until we get to a higher score */
for (i = 0; i < MAX_HISCORES; i++)
{
if (highscore_read(highscore_fd, &the_score)) return (i);
if (strcmp(the_score.pts, score->pts) < 0) return (i);
}
/* The "last" entry is always usable */
return (MAX_HISCORES - 1);
}
int highscore_add(int highscore_fd, high_score *score)
{
int i, slot;
bool_ done = FALSE;
high_score the_score, tmpscore;
/* Paranoia -- it may not have opened */
if (highscore_fd < 0) return ( -1);
/* Determine where the score should go */
slot = highscore_where(highscore_fd, score);
/* Hack -- Not on the list */
if (slot < 0) return ( -1);
/* Hack -- prepare to dump the new score */
the_score = (*score);
/* Slide all the scores down one */
for (i = slot; !done && (i < MAX_HISCORES); i++)
{
/* Read the old guy, note errors */
if (highscore_seek(highscore_fd, i)) return ( -1);
if (highscore_read(highscore_fd, &tmpscore)) done = TRUE;
/* Back up and dump the score we were holding */
if (highscore_seek(highscore_fd, i)) return ( -1);
if (highscore_write(highscore_fd, &the_score)) return ( -1);
/* Hack -- Save the old score, for the next pass */
the_score = tmpscore;
}
/* Return location used */
return (slot);
}
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