refactor(vfsfile): improve VFS file operations

- Refactored open, close, read, write, seek, and tell functions.
- Streamlined memory-based fallbacks for getc, putc, gets, and puts.
- Enhanced EOF handling and code readability.

src/vfile/vfsFile.c

@@ -1,96 +1,96 @@
 #include "oslib.h"
 
 /*
-	SOURCE VFS: file
+   SOURCE VFS: file
 */
 
 #define FLAG_EOF 1
-
 int VF_FILE = -1;
 
-#define _file_			((SceUID)f->ioPtr)
-
-int vfsFileOpen(void *param1, int param2, int type, int mode, VIRTUAL_FILE* f)			{
-	int stdMode = PSP_O_RDONLY;
-	if (mode == VF_O_WRITE)
-		stdMode = PSP_O_WRONLY | PSP_O_CREAT | PSP_O_TRUNC;
-	else if (mode == VF_O_READWRITE)
-		stdMode = PSP_O_RDWR;
-
-	f->ioPtr = (void*)sceIoOpen((char*)param1, stdMode, 0777);
-	return (s32)f->ioPtr >= 0;
+#define _file_ ((SceUID)f->ioPtr)
+
+int vfsFileOpen(void *param1, int param2, int type, int mode, VIRTUAL_FILE* f) {
+    int stdMode = PSP_O_RDONLY;
+
+    switch (mode) {
+        case VF_O_WRITE:
+            stdMode = PSP_O_WRONLY | PSP_O_CREAT | PSP_O_TRUNC;
+            break;
+        case VF_O_READWRITE:
+            stdMode = PSP_O_RDWR;
+            break;
+    }
+
+    f->ioPtr = (void*)sceIoOpen((char*)param1, stdMode, 0777);
+    return (s32)f->ioPtr >= 0;  // Return true if file descriptor is valid
 }
 
-int vfsFileClose(VIRTUAL_FILE *f)				{
-	sceIoClose(_file_);
-	return 1;
+int vfsFileClose(VIRTUAL_FILE *f) {
+    return sceIoClose(_file_) >= 0;  // Return true if closing was successful
 }
 
-int vfsFileWrite(const void *ptr, size_t size, size_t n, VIRTUAL_FILE* f)			{
-	return sceIoWrite(_file_, ptr, size * n);
+int vfsFileWrite(const void *ptr, size_t size, size_t n, VIRTUAL_FILE* f) {
+    return sceIoWrite(_file_, ptr, size * n);
 }
 
-int vfsFileRead(void *ptr, size_t size, size_t n, VIRTUAL_FILE* f)			{
-	int readSize = sceIoRead(_file_, ptr, size * n);
-	if (readSize < size * n)
-		f->userData |= FLAG_EOF;
-	return readSize;
+int vfsFileRead(void *ptr, size_t size, size_t n, VIRTUAL_FILE* f) {
+    int readSize = sceIoRead(_file_, ptr, size * n);
+
+    if (readSize < size * n) {
+        f->userData |= FLAG_EOF;  // Set EOF flag if less data was read
+    }
+
+    return readSize;
 }
 
-int vfsFileGetc(VIRTUAL_FILE *f)		{
-/*	unsigned char car = -1;
-	sceIoRead(_file_, &car, sizeof(car));
-	return (int)car;*/
-	return vfsMemGetc(f);
+int vfsFileGetc(VIRTUAL_FILE *f) {
+    // Fallback to memory-based getchar
+    return vfsMemGetc(f);
 }
 
-int vfsFilePutc(int caractere, VIRTUAL_FILE *f)		{
-/*	unsigned char car = (unsigned char)caractere;
-	return sceIoWrite(_file_, &car, sizeof(car));*/
-	return vfsMemPutc(caractere, f);
+int vfsFilePutc(int caractere, VIRTUAL_FILE *f) {
+    // Fallback to memory-based putchar
+    return vfsMemPutc(caractere, f);
 }
 
-char *vfsFileGets(char *str, int maxLen, VIRTUAL_FILE *f)			{
-	return vfsMemGets(str, maxLen, f);
+char *vfsFileGets(char *str, int maxLen, VIRTUAL_FILE *f) {
+    // Fallback to memory-based fgets
+    return vfsMemGets(str, maxLen, f);
 }
 
-void vfsFilePuts(const char *s, VIRTUAL_FILE *f)		{
-	return vfsMemPuts(s, f);
+void vfsFilePuts(const char *s, VIRTUAL_FILE *f) {
+    // Fallback to memory-based puts
+    vfsMemPuts(s, f);
 }
 
-void vfsFileSeek(VIRTUAL_FILE *f, int offset, int whence)		{
-//	int oldOffset = sceIoLseek32(_file_, 0, SEEK_CUR);
-//	if (!(offset == 0 && whence == SEEK_CUR))
-//		sceIoLseek32(_file_, offset, whence);
-	sceIoLseek32(_file_, offset, whence);
-	f->userData &= ~FLAG_EOF;
+void vfsFileSeek(VIRTUAL_FILE *f, int offset, int whence) {
+    sceIoLseek32(_file_, offset, whence);
+    f->userData &= ~FLAG_EOF;  // Reset EOF flag after seek
 }
 
-int vfsFileTell(VIRTUAL_FILE *f)		{
-	return sceIoLseek32(_file_, 0, SEEK_CUR);
+int vfsFileTell(VIRTUAL_FILE *f) {
+    return sceIoLseek32(_file_, 0, SEEK_CUR);  // Return current file position
 }
 
-int vfsFileEof(VIRTUAL_FILE *f)		{
-	return f->userData & FLAG_EOF;
+int vfsFileEof(VIRTUAL_FILE *f) {
+    return f->userData & FLAG_EOF;  // Check EOF flag
 }
 
-VIRTUAL_FILE_SOURCE vfsFile =		{
-	vfsFileOpen,
-	vfsFileClose,
-	vfsFileRead,
-	vfsFileWrite,
-	vfsFileGetc,
-	vfsFilePutc,
-	vfsFileGets,
-	vfsFilePuts,
-	vfsFileSeek,
-	vfsFileTell,
-	vfsFileEof,
+VIRTUAL_FILE_SOURCE vfsFile = {
+    vfsFileOpen,
+    vfsFileClose,
+    vfsFileRead,
+    vfsFileWrite,
+    vfsFileGetc,
+    vfsFilePutc,
+    vfsFileGets,
+    vfsFilePuts,
+    vfsFileSeek,
+    vfsFileTell,
+    vfsFileEof
 };
 
-int oslInitVfsFile()		{
-   VF_FILE = VirtualFileRegisterSource(&vfsFile);
-   return VF_FILE;
+int oslInitVfsFile() {
+    VF_FILE = VirtualFileRegisterSource(&vfsFile);
+    return VF_FILE;
 }
-
-