FS_command_default through FSi_WriteFileCommand

arm9/arm9.lcf

@@ -113,6 +113,7 @@ SECTIONS {
 #include "undefined_syms.txt"
 	.arm9 : {
 		SDK_STATIC_START = .;
+		SDK_STATIC_TEXT_START = .;
 		secure.o (.text)
 		crt0.o (.text)
 		crt0.o (.version)
@@ -202,6 +203,7 @@ SECTIONS {
 		PXI_init.o (.text)
 		PXI_fifo.o (.text)
 		FS_command.o (.text)
+		FS_command_default.asm.o (.text)
 		FS_command_default.o (.text)
 		FS_archive.o (.text)
 		FS_file.o (.text)
@@ -221,13 +223,18 @@ SECTIONS {
 		libc.o (.text)
 		/* MWCC library */
 		libmwcc.o (.text)
+		SDK_STATIC_TEXT_END = .;
 
 		/* Static data */
+		SDK_STATIC_DATA_START = .;
 		rom2.o (.data)
 		string_util.o (.data)
 		rom2_2.o (.data)
-		FS_rom.o (.data)
+		FS_command_default.o (.rodata)
 		rom2_3.o (.data)
+		FS_rom.o (.data)
+		rom2_4.o (.data)
+		SDK_STATIC_DATA_END = .;
 		SDK_STATIC_END = .;
 		SDK_STATIC_SIZE = SDK_STATIC_END - SDK_STATIC_START;
 	} > arm9

arm9/asm/FS_command_default.asm.s

@@ -1,6 +1,9 @@
 	.include "asm/macros.inc"
 	.include "global.inc"
 	.section .text
+	.extern FSi_StrNICmp
+	.extern FSi_ReadTable
+	.extern FSi_SeekDirDirect
 
 	arm_func_start FSi_CloseFileCommand
 FSi_CloseFileCommand: ; 0x020D0114
@@ -42,7 +45,6 @@ FSi_OpenFileFastCommand: ; 0x020D0144
 	mov r2, #0x8
 	str r3, [sp, #0xc]
 	bl FSi_ReadTable
-_020D0194:
 	cmp r0, #0
 	addne sp, sp, #0x14
 	ldmneia sp!, {r4-r5,lr}
@@ -614,135 +616,3 @@ _020D0978:
 	bx lr
 	.balign 4
 _020D0988: .word 0x00000FFF
-
-	arm_func_start FSi_WriteFileCommand
-FSi_WriteFileCommand: ; 0x020D098C
-	stmdb sp!, {lr}
-	sub sp, sp, #0x4
-	ldr r2, [r0, #0x2c]
-	ldr r3, [r0, #0x38]
-	ldr lr, [r0, #0x8]
-	ldr r1, [r0, #0x30]
-	add r12, r2, r3
-	str r12, [r0, #0x2c]
-	ldr r12, [lr, #0x4c]
-	mov r0, lr
-	blx r12
-	add sp, sp, #0x4
-	ldmia sp!, {lr}
-	bx lr
-
-	arm_func_start FSi_ReadFileCommand
-FSi_ReadFileCommand: ; 0x020D09C4
-	stmdb sp!, {lr}
-	sub sp, sp, #0x4
-	ldr r2, [r0, #0x2c]
-	ldr r3, [r0, #0x38]
-	ldr lr, [r0, #0x8]
-	ldr r1, [r0, #0x30]
-	add r12, r2, r3
-	str r12, [r0, #0x2c]
-	ldr r12, [lr, #0x48]
-	mov r0, lr
-	blx r12
-	add sp, sp, #0x4
-	ldmia sp!, {lr}
-	bx lr
-
-	arm_func_start FSi_SeekDirDirect
-FSi_SeekDirDirect: ; 0x020D09FC
-	ldr r3, [r0, #0xc]
-	mov r2, #0x0
-	orr r3, r3, #0x4
-	str r3, [r0, #0xc]
-	ldr r3, [r0, #0x8]
-	ldr ip, _020D0A2C ; =FSi_TranslateCommand
-	str r3, [r0, #0x30]
-	str r2, [r0, #0x38]
-	strh r2, [r0, #0x36]
-	strh r1, [r0, #0x34]
-	mov r1, #0x2
-	bx r12
-	.balign 4
-_020D0A2C: .word FSi_TranslateCommand
-
-	arm_func_start FSi_ReadTable
-FSi_ReadTable:
-	stmdb sp!, {r4-r8,lr}
-	mov r7, r0
-	ldr r5, [r7, #0x0]
-	mov r6, r2
-	ldr r2, [r5, #0x1c]
-	mov r0, r5
-	orr r2, r2, #0x200
-	str r2, [r5, #0x1c]
-	ldr r2, [r7, #0x4]
-	ldr r4, [r5, #0x50]
-	mov r3, r6
-	blx r4
-	cmp r0, #0x0
-	beq _020D0A7C
-	cmp r0, #0x1
-	beq _020D0A7C
-	cmp r0, #0x6
-	beq _020D0A8C
-	b _020D0AC8
-_020D0A7C:
-	ldr r1, [r5, #0x1c]
-	bic r1, r1, #0x200
-	str r1, [r5, #0x1c]
-	b _020D0AC8
-_020D0A8C:
-	bl OS_DisableInterrupts
-	ldr r1, [r5, #0x1c]
-	mov r4, r0
-	ands r0, r1, #0x200
-	beq _020D0AB8
-	add r8, r5, #0xc
-_020D0AA4:
-	mov r0, r8
-	bl OS_SleepThread
-	ldr r0, [r5, #0x1c]
-	ands r0, r0, #0x200
-	bne _020D0AA4
-_020D0AB8:
-	mov r0, r4
-	bl OS_RestoreInterrupts
-	ldr r0, [r5, #0x24]
-	ldr r0, [r0, #0x14]
-_020D0AC8:
-	ldr r1, [r7, #0x4]
-	add r1, r1, r6
-	str r1, [r7, #0x4]
-	ldmia sp!, {r4-r8,lr}
-	bx lr
-
-	arm_func_start FSi_StrNICmp
-FSi_StrNICmp: ; 0x020D0ADC
-	stmdb sp!, {lr}
-	sub sp, sp, #0x4
-	cmp r2, #0x0
-	mov lr, #0x0
-	bls _020D0B30
-_020D0AF0:
-	ldrb r12, [r0, lr]
-	ldrb r3, [r1, lr]
-	sub r12, r12, #0x41
-	cmp r12, #0x19
-	sub r3, r3, #0x41
-	addls r12, r12, #0x20
-	cmp r3, #0x19
-	addls r3, r3, #0x20
-	cmp r12, r3
-	addne sp, sp, #0x4
-	subne r0, r12, r3
-	ldmneia sp!, {lr}
-	bxne lr
-	add lr, lr, #0x1
-	cmp lr, r2
-	blo _020D0AF0
-_020D0B30:
-	mov r0, #0x0
-	add sp, sp, #0x4
-	ldmia sp!, {lr}
-	bx lr

arm9/data/rom2_2.s

@@ -733,6 +733,3 @@ gScriptCmdTable: ; 0x020F355C
 
 	.incbin "baserom.nds", 0xF80A0, 0xFEE0
 
-	.global fsi_default_command
-fsi_default_command: ; 0x02103F80
-	.incbin "baserom.nds", 0x107F80, 0x28b0

arm9/data/rom2_3.s

@@ -5,5 +5,5 @@
 
 	.section .data
 
-	/* 0x02106834 */
-	.incbin "baserom.nds", 0x10a834, 0x76c
+	/* 0x02103FA4 */
+	.incbin "baserom.nds", 0x107FA4, 0x288C

arm9/data/rom2_4.s

@@ -0,0 +1,9 @@
+	.include "asm/macros.inc"
+	.include "global.inc"
+
+	/* rom2.s TODO: Disassemble */
+
+	.section .data
+
+	/* 0x02106834 */
+	.incbin "baserom.nds", 0x10a834, 0x76c

arm9/lib/src/FS_command_default.c

@@ -0,0 +1,108 @@
+#include "nitro.h"
+#include "FS_file.h"
+#include "FS_command.h"
+#include "FS_archive.h"
+#include "MI_byteAccess.h"
+
+typedef struct
+{
+    FSArchive *arc;
+    u32 pos;
+}
+FSiSyncReadParam;
+
+FSResult FSi_ReadFileCommand(FSFile * p_file);
+FSResult FSi_WriteFileCommand(FSFile * p_file);
+FSResult FSi_SeekDirCommand(FSFile * p_file);
+FSResult FSi_ReadDirCommand(FSFile * p_file);
+FSResult FSi_FindPathCommand(FSFile * p_file);
+FSResult FSi_GetPathCommand(FSFile * p_file);
+FSResult FSi_OpenFileFastCommand(FSFile * p_file);
+FSResult FSi_OpenFileDirectCommand(FSFile * p_file);
+FSResult FSi_CloseFileCommand(FSFile * p_file);
+
+FSResult (*const fsi_default_command[])(FSFile *) = {
+    [FS_COMMAND_READFILE]       = FSi_ReadFileCommand,
+    [FS_COMMAND_WRITEFILE]      = FSi_WriteFileCommand,
+    [FS_COMMAND_SEEKDIR]        = FSi_SeekDirCommand,
+    [FS_COMMAND_READDIR]        = FSi_ReadDirCommand,
+    [FS_COMMAND_FINDPATH]       = FSi_FindPathCommand,
+    [FS_COMMAND_GETPATH]        = FSi_GetPathCommand,
+    [FS_COMMAND_OPENFILEFAST]   = FSi_OpenFileFastCommand,
+    [FS_COMMAND_OPENFILEDIRECT] = FSi_OpenFileDirectCommand,
+    [FS_COMMAND_CLOSEFILE]      = FSi_CloseFileCommand,
+};
+
+// Case-insensitive string comparison
+u32 FSi_StrNICmp(const char * str1, const char * str2, u32 len)
+{
+    int i;
+    for (i = 0; i < len; i++)
+    {
+        u32 c = MI_ReadByte(str1 + i) - 'A';
+        u32 d = MI_ReadByte(str2 + i) - 'A';
+        if (c <= 'Z' - 'A')
+            c += 'a' - 'A';
+        if (d <= 'Z' - 'A')
+            d += 'a' - 'A';
+        if (c != d)
+            return c - d;
+    }
+    return 0;
+}
+
+FSResult FSi_ReadTable(FSiSyncReadParam * p, void * dst, u32 len)
+{
+    FSResult ret;
+    FSArchive * const p_arc = p->arc;
+    p_arc->flag |= FS_ARCHIVE_FLAG_IS_SYNC;
+    switch (ret = (*p_arc->table_func)(p_arc, dst, p->pos, len))
+    {
+    case FS_RESULT_SUCCESS:
+    case FS_RESULT_FAILURE:
+        p_arc->flag &= ~FS_ARCHIVE_FLAG_IS_SYNC;
+        break;
+    case FS_RESULT_PROC_ASYNC:
+    {
+        OSIntrMode bak_psr = OS_DisableInterrupts();
+        while (FSi_IsArchiveSync(p_arc))
+            OS_SleepThread(&p_arc->sync_q);
+        OS_RestoreInterrupts(bak_psr);
+        ret = p_arc->list.next->error;
+    }
+        break;
+    }
+    p->pos += len;
+    return ret;
+}
+
+FSResult FSi_SeekDirDirect(FSFile * p_dir, u32 id)
+{
+    p_dir->stat |= FS_FILE_STATUS_SYNC;
+    p_dir->arg.seekdir.pos.arc = p_dir->arc;
+    p_dir->arg.seekdir.pos.pos = 0;
+    p_dir->arg.seekdir.pos.index = 0;
+    p_dir->arg.seekdir.pos.own_id = (u16)id;
+    return FSi_TranslateCommand(p_dir, FS_COMMAND_SEEKDIR);
+}
+
+// The actual commands
+FSResult FSi_ReadFileCommand(FSFile * p_file)
+{
+    FSArchive *const p_arc = p_file->arc;
+    const u32 pos = p_file->prop.file.pos;
+    const u32 len = p_file->arg.readfile.len;
+    void *const dst = p_file->arg.readfile.dst;
+    p_file->prop.file.pos += len;
+    return (*p_arc->read_func)(p_arc, dst, pos, len);
+}
+
+FSResult FSi_WriteFileCommand(FSFile * p_file)
+{
+    FSArchive *const p_arc = p_file->arc;
+    const u32 pos = p_file->prop.file.pos;
+    const u32 len = p_file->arg.writefile.len;
+    const void *const src = p_file->arg.writefile.src;
+    p_file->prop.file.pos += len;
+    return (*p_arc->write_func)(p_arc, src, pos, len);
+}