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sort disk images in the BIOS

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This commit is contained in:
Jorj Bauer 2020-07-11 19:43:00 -04:00
parent 9b21e88296
commit db39f6e5b7
2 changed files with 31 additions and 0 deletions
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29
bios.cpp
View File

@ -1,3 +1,4 @@
#include <string.h>
#include "globals.h"
#include "bios.h"
@ -824,6 +825,7 @@ uint16_t BIOS::DrawDiskNames(uint8_t page, int8_t selection, const char *filter)
return fileCount;
}
// Read a directory, cache all the entries
uint16_t BIOS::cacheAllEntries(const char *filter)
{
// If we've already cached this directory, then just return it
@ -860,12 +862,39 @@ uint16_t BIOS::cacheAllEntries(const char *filter)
/* NOTREACHED */
}
void BIOS::swapCacheEntries(int a, int b)
{
struct _cacheEntry tmpEntry;
strcpy(tmpEntry.fn, biosCache[a].fn);
strcpy(biosCache[a].fn, biosCache[b].fn);
strcpy(biosCache[b].fn, tmpEntry.fn);
}
// Take all the entries in the cache and sort htem
void BIOS::sortCachedEntries()
{
if (numCacheEntries <= 1)
return;
bool changedAnything = true;
while (changedAnything) {
changedAnything = false;
for (int i=0; i<numCacheEntries-1; i++) {
if (strcmp(biosCache[i].fn, biosCache[i+1].fn) > 0) {
swapCacheEntries(i, i+1);
changedAnything = true;
}
}
}
}
uint16_t BIOS::GatherFilenames(uint8_t pageOffset, const char *filter)
{
uint8_t startNum = 10 * pageOffset;
uint8_t count = 0; // number we're including in our listing
uint16_t numEntriesTotal = cacheAllEntries(filter);
sortCachedEntries();
if (numEntriesTotal > BIOSCACHESIZE) {
// ... umm, this is a problem. FIXME?
}

2
bios.h
View File

@ -46,6 +46,8 @@ class BIOS {
void showAbout();
uint16_t cacheAllEntries(const char *filter);
void sortCachedEntries();
void swapCacheEntries(int a, int b);
private:
int8_t selectedFile;