lib/streamio: Initial commit

Makefile

@@ -7,7 +7,7 @@ IMAGE_SIZE := 16777216
 ROM_IMAGE_SIZE := 196608
 BOOTLOADER := bootloader/bootloader.bin
 
-all: fox32os.img romdisk.img
+all: base_image/streamio.lbr fox32os.img romdisk.img
 
 base_image:
 	mkdir -p base_image
@@ -130,15 +130,23 @@ ROM_FILES = \
 	base_image/loadfont.fxf \
 	base_image/tasks.fxf
 
-fox32os.img: $(BOOTLOADER) $(FILES)
+base_image/%.lbr: $(wildcard libraries/*/*.asm)
+	cd libraries && $(MAKE)
+
+fox32os.img: $(BOOTLOADER) $(FILES) $(wildcard libraries/*/*.asm)
 	$(RYFS) -s $(IMAGE_SIZE) -l fox32os -b $(BOOTLOADER) create $@.tmp
+	for file in base_image/*.lbr; do $(RYFS) add $@.tmp $$file; done
 	for file in $(FILES); do $(RYFS) add $@.tmp $$file; done
 	mv $@.tmp $@
 
-romdisk.img: $(BOOTLOADER) $(ROM_FILES)
+romdisk.img: $(BOOTLOADER) $(ROM_FILES) $(wildcard libraries/*/*.asm)
 	$(RYFS) -s $(ROM_IMAGE_SIZE) -l romdisk -b $(BOOTLOADER) create $@.tmp
+	for file in base_image/*.lbr; do $(RYFS) add $@.tmp $$file; done
 	for file in $(ROM_FILES); do $(RYFS) add $@.tmp $$file; done
 	mv $@.tmp $@
 
 clean:
+	cd libraries && $(MAKE) clean
 	rm -f $(FILES)
+
+.PHONY: clean

libraries/Makefile

@@ -0,0 +1,12 @@
+FOX32ASM := ../../fox32asm/target/release/fox32asm
+
+FILES = \
+	../base_image/streamio.lbr
+
+all: $(FILES)
+
+../base_image/%.lbr: %/main.asm
+	$(FOX32ASM) $< $@
+
+clean:
+	rm -f $(FILES)

libraries/streamio/main.asm

@@ -0,0 +1,84 @@
+    opton
+
+jump_table:
+    data.32 print_character
+    data.32 print_string
+    data.32 print_decimal
+    data.32 0x00000000 ; end jump table
+
+const ROM_string_length: 0xF0046018
+const OS_write: 0x00000D20
+
+; print a single character to the given stream
+; inputs:
+; r0: character byte
+; r1: stream pointer
+; outputs:
+; none
+print_character:
+    push r2
+
+    push r0
+    mov r2, rsp
+    mov r0, 1
+    call [OS_write]
+    pop r0
+
+    pop r2
+    ret
+
+; print a null-terminated string to the given stream
+; inputs:
+; r0: pointer to null-terminated string
+; r1: stream pointer
+; outputs:
+; none
+print_string:
+    push r0
+    push r2
+
+    mov r2, r0
+    call [ROM_string_length]
+    call [OS_write]
+
+    pop r2
+    pop r0
+    ret
+
+; print a decimal integer to the given stream
+; inputs:
+; r0: integer
+; r1: stream pointer
+; outputs:
+; none
+print_decimal:
+    push r0
+    push r10
+    push r11
+    push r12
+    push r13
+    mov r10, rsp
+    mov r12, r0
+
+    push.8 0
+print_decimal_loop:
+    push r12
+    div r12, 10
+    pop r13
+    rem r13, 10
+    mov r11, r13
+    add r11, '0'
+    push.8 r11
+    cmp r12, 0
+    ifnz jmp print_decimal_loop
+
+    mov r0, rsp
+    call print_string
+
+    mov rsp, r10
+    pop r13
+    pop r12
+    pop r11
+    pop r10
+    pop r0
+    ret