core: add BFile_FindFirst, Next and Close syscalls

The return code -1 noted in the BFile_FindFirst or BFile_FindNext is
from test,  which mean it could be possibles that they are negative
error code from functions failing and not meaning that no file have been
found, to be sure, the value IML_FILEERR_ENUMERATEEND from filebios.h in
the fxlib need to be checked (and maybe defined in gint with a more
meaningful name for user interactivity)

include/gint/bfile.h

@@ -84,4 +84,41 @@ int BFile_Write(int fd, void const *data, int even_size);
    Returns a BFile error code. */
 int BFile_Read(int handle, void *data, int size, int whence);
 
+/* BFile_FindFirst(): Search a directory for file with matching name.
+   Doesn't work on Main memory.
+   Only four search handle can be opened, you need to close them to be able to reuse them.
+   Search is NOT case sensitive and * can be used to match any string.
+
+   @search      FONTCHARACTER file path to match
+   @shandle     Search handle to pass to BFile_FindNext or BFile_FindClose
+   @founfile    FONTCHARACTER found file path
+   @fileinfo    Structure containing a lot of information on the found file
+   Return 0 on success, -1 if no file found, or negative value on error. */
+typedef struct tag_FILE_INFO
+{
+    unsigned short id;       //file index
+    unsigned short type;     //file type
+    unsigned long  fsize;    //file size
+    unsigned long  dsize;    //date size (file - header)
+    unsigned int   property; //if 0 file complete
+    unsigned long  adress;   //top adress of data (direct access is unadvised)
+} FILE_INFO;
+int BFile_FindFirst(uint16_t const *search, int *shandle, uint16_t *foundfile, FILE_INFO *fileinfo);
+
+/* BFile_FindNext(): Continue a search a directory for file with matching name.
+   Only four search handle can be opened, u need to close them to be able to reuse them.
+
+   @shandle     Search handle from BFile_FindFirst
+   @founfile    FONTCHARACTER found file path
+   @fileinfo    Structure containing a lot of information on the found file
+   Return 0 on success, -1 if no file found, or negative value on error. */
+int BFile_FindNext(int shandle, uint16_t *foundfile, FILE_INFO *fileinfo);
+
+/* BFile_FindClose(): Close the specified search handle
+   Only four search handle can be opened, u need to close them to be able to reuse them.
+
+   @shandle     Search handle from BFile_FindFirst
+   Return 0 on success or negative value on error. */
+int BFile_FindClose(int shandle);
+
 #endif /* GINT_BFILE */

src/core/syscalls.S

@@ -26,6 +26,9 @@
 .global	_BFile_Size
 .global	_BFile_Write
 .global	_BFile_Read
+.global	_BFile_FindFirst
+.global	_BFile_FindNext
+.global	_BFile_FindClose
 
 .section ".pretext"
 
@@ -84,6 +87,18 @@ _BFile_Write:
 _BFile_Read:
 	syscall(0x0432)
 
+# int BFile_FindFirst(uint16_t const *search, int *shandle, uint16_t *foundfile, FILE_INFO *fileinfo)
+_BFile_FindFirst:
+    syscall(0x043b)
+
+# int BFile_FindNext(int shandle, uint16_t *foundfile, FILE_INFO *fileinfo)
+_BFile_FindNext:
+    syscall(0x043c)
+
+# int BFile_FindClose(int shandle)
+_BFile_FindClose:
+    syscall(0x043d)
+
 syscall_table:
 	.long	0x80010070