Reorganized snippets and macros into src/lib

Author: scopeInfinity

src/lib/syscalls/basic.h

@@ -0,0 +1,10 @@
+#ifndef __LIB_SYSCALLS_BASIC
+#define __LIB_SYSCALLS_BASIC
+
+#define WINDOW_HEIGHT            0x18
+#define WINDOW_WIDTH             0x4F
+#define CLOCKS_PER_MS            56230 // 5% of Host CPU
+
+#define INT_MAX                  0xFFFFFFFF
+
+#endif

src/lib/syscalls/io.h

@@ -0,0 +1,46 @@
+#ifndef __LIB_SYSCALLS_IO
+#define __LIB_SYSCALLS_IO
+
+extern void _low_print(char str[], unsigned short n,
+                       unsigned char x,unsigned char y,
+                       unsigned char color);
+
+extern void _low_put_chars(char c,unsigned short count, unsigned char color);
+extern void _low_move_xy(unsigned char x, unsigned char y, unsigned char page);
+extern void _low_clear_screen(unsigned char color,
+                              unsigned char x1,unsigned char y1,
+                              unsigned char x2, unsigned char y2);
+
+unsigned char IO_CURRENT_X = 0;
+unsigned char IO_CURRENT_Y = 0;
+
+void move_xy(unsigned char x, unsigned char y) {
+    IO_CURRENT_X=x;
+    IO_CURRENT_Y=y;
+    _low_move_xy(x,y,0);
+}
+
+void move_xy_diff(unsigned char dx, unsigned char dy) {
+    IO_CURRENT_X+=dx;
+    IO_CURRENT_Y+=dy;
+    _low_move_xy(IO_CURRENT_X,IO_CURRENT_Y,0);
+}
+
+void put_char(char c, unsigned char color) {
+    _low_put_chars(c,1, color);
+    move_xy_diff(1, 0);
+}
+
+void put_chars(char c,unsigned short count, unsigned char color) {
+    _low_put_chars(c,count, color);
+    move_xy_diff(count, 0);
+}
+
+void put_string(char *str, unsigned char color) {
+    while((*str)!='\0') {
+        put_char(*str, color);
+        str++;
+    }
+}
+
+#endif

src/lib/syscalls/io_syscall.asm

@@ -0,0 +1,53 @@
+global _low_put_chars
+global _low_move_xy
+global _low_clear_screen
+
+%macro  PLUGIN_SYSCALLS_IO 0
+
+_low_put_chars:
+    push ebp
+    mov ebp, esp
+
+    mov ah, 0x09                 ; (write)
+    mov al, [ebp + 0x8]          ; (char)
+    mov cx, [ebp + 0xc]          ; (count)
+    mov bh, 0x00                 ; (pagenumber)
+    mov bl, [ebp + 0x10]         ; (attribute)
+    int 0x10
+
+    mov esp, ebp
+    pop ebp
+    ret
+
+_low_move_xy:
+    push ebp
+    mov ebp, esp
+
+    mov ah, 0x02                 ; (set custor position)
+    mov dl, [ebp + 0x8]          ; (pos_x)
+    mov dh, [ebp + 0xc]          ; (pos_y)
+    mov bh, [ebp + 0x10]         ; (page number)
+    int 0x10
+
+    mov esp, ebp
+    pop ebp
+    ret
+
+_low_clear_screen:
+    push ebp
+    mov ebp, esp
+
+    mov ah, 0x06                  ; (scroll)
+    mov al, 0x00                  ; (line count)
+    mov bh, [ebp + 0x08]          ; (attribute)
+    mov cl, [ebp + 0x0c]          ; (window top-left x)
+    mov ch, [ebp + 0x10]          ; (window top-left y)
+    mov dl, [ebp + 0x14]          ; (window bottom-right x)
+    mov dh, [ebp + 0x18]          ; (window bottom-right y)
+    int 0x10
+
+    mov esp, ebp
+    pop ebp
+    ret
+
+%endmacro

src/lib/syscalls/time.h

@@ -0,0 +1,20 @@
+#ifndef __LIB_SYSCALLS_TIME
+#define __LIB_SYSCALLS_TIME
+
+#include "lib/syscalls/basic.h"
+#define SLEEP_FACTOR_NUM         3     // Possiblity of improvement.
+#define SLEEP_FACTOR_DENO        2
+#define SLEEP_BURST_MS           INT_MAX/CLOCKS_PER_MS/SLEEP_FACTOR_NUM*SLEEP_FACTOR_DENO
+
+extern void _low_sleep(unsigned int half_instructions_count);
+
+void sleep(unsigned int ms) {
+    while(ms>0) {
+        unsigned int fms = ms>SLEEP_BURST_MS?SLEEP_BURST_MS:ms;
+        unsigned int cycles = CLOCKS_PER_MS*fms/SLEEP_FACTOR_DENO*SLEEP_FACTOR_NUM;
+        _low_sleep(cycles);
+        ms-=fms;
+    }
+}
+
+#endif

src/lib/syscalls/time_syscall.asm

@@ -0,0 +1,17 @@
+global _low_sleep
+
+%macro  PLUGIN_SYSCALLS_TIME 0
+
+_low_sleep:
+    push ebp
+    mov ebp, esp
+    mov ebx, [ebp + 0x08]          ; (cycles)
+    _low_sleep_internal:
+    sub ebx, 1
+    jnc _low_sleep_internal
+
+    mov esp, ebp
+    pop ebp
+    ret
+
+%endmacro

src/lib/util/color.h

@@ -0,0 +1,18 @@
+#define    C_BLACK               0x0
+#define    C_BLUE                0x1
+#define    C_GREEN               0x2
+#define    C_CYAN                0x3
+#define    C_RED                 0x4
+#define    C_MAGENTA             0x5
+#define    C_BROWN               0x6
+#define    C_LIGHT_GRAY          0x7
+#define    C_DARK_GRAY           0x8
+#define    C_LIGHT_BLUE          0x9
+#define    C_LIGHT_GREEN         0xA
+#define    C_LIGHT_CYAN          0xB
+#define    C_LIGHT_RED           0xC
+#define    C_LIGHT_MAGENTA       0xD
+#define    C_YELLOW              0xE
+#define    C_WHITE               0xF
+
+#define make_color(fg, bg) ((unsigned char)((fg) + ((bg)<<4)))