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add in WHB helpers for PCFS/HFIO #435

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73 changes: 73 additions & 0 deletions libraries/libwhb/include/whb/hfio.h
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#pragma once
#include <wut.h>

/**
* \defgroup whb_hfio Host I/O access
* \ingroup whb
* @{
*/

#ifdef __cplusplus
extern "C" {
#endif

typedef enum WHBWellKnownHostDirectory
{
//! A way to quickly reference the emulated MLC directory on a attached host
//! pc.
//!
//! You should prefer to use this for compatability (as it will be the same
//! across systems, even with separate paths), and it will usually be fewer
//! characters meaning the actual path can be used by more of the important
//! stuff.
WHB_MLC_HOST_DIRECTORY = 0,
//! A way to quickly reference the emulated SLC directory on a attached host
//! pc.
//!
//! You should prefer to use this for compatability (as it will be the same
//! across systems, even with separate paths), and it will usually be fewer
//! characters meaning the actual path can be used by more of the important
//! stuff.
WHB_SLC_HOST_DIRECTORY = 1,
//! A way to quickly reference the emulated directory of the 'optical disc'
//! on a attached host pc.
//!
//! You should prefer to use this for compatability (as it will be the same
//! across systems, even with separate paths), and it will usually be fewer
//! characters meaning the actual path can be used by more of the important
//! stuff.
WHB_DISC_HOST_DIRECTORY = 2,
//! A way to quickly reference the emulated directory of the current titles
//! save directory.
//!
//! You should prefer to use this for compatability (as it will be the same
//! across systems, even with separate paths), and it will usually be fewer
//! characters meaning the actual path can be used by more of the important
//! stuff.
WHB_SAVE_HOST_DIRECTORY = 3,
//! A way to quickly reference an attached network drive of the host pc.
//!
//! You should prefer to use this for compatability (as it will be the same
//! across systems, even with separate paths), and it will usually be fewer
//! characters meaning the actual path can be used by more of the important
//! stuff.
WHB_NETWORK_DRIVE_HOST_DIRECTORY = 4,
} WHBWellKnownHostDirectory;

BOOL
WHBMountHostFileIO();

char *
WHBGetHostFileIOMountPath();

char *
WHBPathForWellKnownHostDirectory(WHBWellKnownHostDirectory directory);

BOOL
WHBUnmountHostFileIO();

#ifdef __cplusplus
}
#endif

/** @} */
122 changes: 122 additions & 0 deletions libraries/libwhb/src/hfio.c
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#include <coreinit/filesystem.h>
#include <coreinit/memdefaultheap.h>
#include <string.h>
#include <whb/hfio.h>
#include <whb/log.h>


static BOOL
sHFIOMounted = FALSE;

static char
sHFIOMountPath[128] = {0};

static FSClient
sHFIOClient;

BOOL
WHBMountHostFileIO()
{
FSCmdBlock cmd;
FSMountSource mountSource;
FSStatus result;

if (sHFIOMounted) {
return TRUE;
}

FSInit();

result = FSAddClient(&sHFIOClient, FS_ERROR_FLAG_ALL);
if (result != FS_STATUS_OK) {
WHBLogPrintf("%s: FSAddClient error %d", __FUNCTION__, result);
return FALSE;
}

FSInitCmdBlock(&cmd);
result = FSGetMountSource(&sHFIOClient, &cmd, FS_MOUNT_SOURCE_HFIO, &mountSource, FS_ERROR_FLAG_ALL);
if (result < 0) {
WHBLogPrintf("%s: FSGetMountSource error %d", __FUNCTION__, result);
goto fail;
}

result = FSMount(&sHFIOClient, &cmd, &mountSource, sHFIOMountPath, sizeof(sHFIOMountPath), FS_ERROR_FLAG_ALL);
if (result < 0) {
WHBLogPrintf("%s: FSMount error %d", __FUNCTION__, result);
goto fail;
}

sHFIOMounted = TRUE;
return TRUE;

fail:
FSDelClient(&sHFIOClient, FS_ERROR_FLAG_ALL);
return FALSE;
}

char *
WHBGetHostFileIOMountPath()
{
return sHFIOMountPath;
}

char *
WHBPathForWellKnownHostDirectory(WHBWellKnownHostDirectory directory)
{
// The host path is 128 bytes, and the maximum we can append is 15 bytes, for a final size of 143.
char *finalPath = (char *)MEMAllocFromDefaultHeap(143);
if (finalPath == NULL) {
return NULL;
}

// Ensure we get a NULL terminator, mimic calloc.
memset(finalPath, 0, 143);
strcat(finalPath, sHFIOMountPath);
strcat(finalPath, "/");
switch (directory) {
case WHB_MLC_HOST_DIRECTORY:
strcat(finalPath, "%MLC_EMU_DIR");
break;
case WHB_SLC_HOST_DIRECTORY:
strcat(finalPath, "%SLC_EMU_DIR");
break;
case WHB_DISC_HOST_DIRECTORY:
strcat(finalPath, "%DISC_EMU_DIR");
break;
case WHB_SAVE_HOST_DIRECTORY:
strcat(finalPath, "%SAVE_EMU_DIR");
break;
case WHB_NETWORK_DRIVE_HOST_DIRECTORY:
strcat(finalPath, "%NETWORK");
break;
}
return finalPath;
}

BOOL
WHBUnmountHostFileIO()
{
FSCmdBlock cmd;
FSStatus result;

if (!sHFIOMounted) {
return TRUE;
}

FSInitCmdBlock(&cmd);

result = FSUnmount(&sHFIOClient, &cmd, sHFIOMountPath, FS_ERROR_FLAG_ALL);
if (result < 0) {
WHBLogPrintf("%s: FSUnmount error %d", __FUNCTION__, result);
return FALSE;
}

result = FSDelClient(&sHFIOClient, FS_ERROR_FLAG_ALL);
if (result < 0) {
WHBLogPrintf("%s: FSDelClient error %d", __FUNCTION__, result);
return FALSE;
}

sHFIOMounted = FALSE;
return TRUE;
}