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main.c
1791 lines (1730 loc) · 55.8 KB
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main.c
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#if 0
gcc -s -O2 -Wno-unused-result -fwrapv main.c `sdl-config --cflags --libs`
exit
#endif
// This file is public domain.
#include "SDL.h"
#include <dirent.h>
#include <err.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include <time.h>
#include <unistd.h>
static const Uint8 fontdata[]={ // font for built-in menus
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x30,0x78,0x78,0x30,0x30,0x00,0x30,0x00,
0x6C,0x6C,0x6C,0x00,0x00,0x00,0x00,0x00,0x6C,0x6C,0xFE,0x6C,0xFE,0x6C,0x6C,0x00,
0x30,0x7C,0xC0,0x78,0x0C,0xF8,0x30,0x00,0x00,0xC6,0xCC,0x18,0x30,0x66,0xC6,0x00,
0x38,0x6C,0x38,0x76,0xDC,0xCC,0x76,0x00,0x60,0x60,0xC0,0x00,0x00,0x00,0x00,0x00,
0x18,0x30,0x60,0x60,0x60,0x30,0x18,0x00,0x60,0x30,0x18,0x18,0x18,0x30,0x60,0x00,
0x00,0x66,0x3C,0xFF,0x3C,0x66,0x00,0x00,0x00,0x30,0x30,0xFC,0x30,0x30,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x30,0x30,0x60,0x00,0x00,0x00,0xFC,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x30,0x30,0x00,0x06,0x0C,0x18,0x30,0x60,0xC0,0x80,0x00,
0x7C,0xC6,0xCE,0xDE,0xF6,0xE6,0x7C,0x00,0x30,0x70,0x30,0x30,0x30,0x30,0xFC,0x00,
0x78,0xCC,0x0C,0x38,0x60,0xCC,0xFC,0x00,0x78,0xCC,0x0C,0x38,0x0C,0xCC,0x78,0x00,
0x1C,0x3C,0x6C,0xCC,0xFE,0x0C,0x1E,0x00,0xFC,0xC0,0xF8,0x0C,0x0C,0xCC,0x78,0x00,
0x38,0x60,0xC0,0xF8,0xCC,0xCC,0x78,0x00,0xFC,0xCC,0x0C,0x18,0x30,0x30,0x30,0x00,
0x78,0xCC,0xCC,0x78,0xCC,0xCC,0x78,0x00,0x78,0xCC,0xCC,0x7C,0x0C,0x18,0x70,0x00,
0x00,0x30,0x30,0x00,0x00,0x30,0x30,0x00,0x00,0x30,0x30,0x00,0x00,0x30,0x30,0x60,
0x18,0x30,0x60,0xC0,0x60,0x30,0x18,0x00,0x00,0x00,0xFC,0x00,0x00,0xFC,0x00,0x00,
0x60,0x30,0x18,0x0C,0x18,0x30,0x60,0x00,0x78,0xCC,0x0C,0x18,0x30,0x00,0x30,0x00,
0x7C,0xC6,0xDE,0xDE,0xDE,0xC0,0x78,0x00,0x30,0x78,0xCC,0xCC,0xFC,0xCC,0xCC,0x00,
0xFC,0x66,0x66,0x7C,0x66,0x66,0xFC,0x00,0x3C,0x66,0xC0,0xC0,0xC0,0x66,0x3C,0x00,
0xF8,0x6C,0x66,0x66,0x66,0x6C,0xF8,0x00,0xFE,0x62,0x68,0x78,0x68,0x62,0xFE,0x00,
0xFE,0x62,0x68,0x78,0x68,0x60,0xF0,0x00,0x3C,0x66,0xC0,0xC0,0xCE,0x66,0x3E,0x00,
0xCC,0xCC,0xCC,0xFC,0xCC,0xCC,0xCC,0x00,0x78,0x30,0x30,0x30,0x30,0x30,0x78,0x00,
0x1E,0x0C,0x0C,0x0C,0xCC,0xCC,0x78,0x00,0xE6,0x66,0x6C,0x78,0x6C,0x66,0xE6,0x00,
0xF0,0x60,0x60,0x60,0x62,0x66,0xFE,0x00,0xC6,0xEE,0xFE,0xFE,0xD6,0xC6,0xC6,0x00,
0xC6,0xE6,0xF6,0xDE,0xCE,0xC6,0xC6,0x00,0x38,0x6C,0xC6,0xC6,0xC6,0x6C,0x38,0x00,
0xFC,0x66,0x66,0x7C,0x60,0x60,0xF0,0x00,0x78,0xCC,0xCC,0xCC,0xDC,0x78,0x1C,0x00,
0xFC,0x66,0x66,0x7C,0x6C,0x66,0xE6,0x00,0x78,0xCC,0xE0,0x70,0x1C,0xCC,0x78,0x00,
0xFC,0xB4,0x30,0x30,0x30,0x30,0x78,0x00,0xCC,0xCC,0xCC,0xCC,0xCC,0xCC,0xFC,0x00,
0xCC,0xCC,0xCC,0xCC,0xCC,0x78,0x30,0x00,0xC6,0xC6,0xC6,0xD6,0xFE,0xEE,0xC6,0x00,
0xC6,0xC6,0x6C,0x38,0x38,0x6C,0xC6,0x00,0xCC,0xCC,0xCC,0x78,0x30,0x30,0x78,0x00,
0xFE,0xC6,0x8C,0x18,0x32,0x66,0xFE,0x00,0x78,0x60,0x60,0x60,0x60,0x60,0x78,0x00,
0xC0,0x60,0x30,0x18,0x0C,0x06,0x02,0x00,0x78,0x18,0x18,0x18,0x18,0x18,0x78,0x00,
0x10,0x38,0x6C,0xC6,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xFF,
0x30,0x30,0x18,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x78,0x0C,0x7C,0xCC,0x76,0x00,
0xE0,0x60,0x60,0x7C,0x66,0x66,0xDC,0x00,0x00,0x00,0x78,0xCC,0xC0,0xCC,0x78,0x00,
0x1C,0x0C,0x0C,0x7C,0xCC,0xCC,0x76,0x00,0x00,0x00,0x78,0xCC,0xFC,0xC0,0x78,0x00,
0x38,0x6C,0x60,0xF0,0x60,0x60,0xF0,0x00,0x00,0x00,0x76,0xCC,0xCC,0x7C,0x0C,0xF8,
0xE0,0x60,0x6C,0x76,0x66,0x66,0xE6,0x00,0x30,0x00,0x70,0x30,0x30,0x30,0x78,0x00,
0x0C,0x00,0x0C,0x0C,0x0C,0xCC,0xCC,0x78,0xE0,0x60,0x66,0x6C,0x78,0x6C,0xE6,0x00,
0x70,0x30,0x30,0x30,0x30,0x30,0x78,0x00,0x00,0x00,0xCC,0xFE,0xFE,0xD6,0xC6,0x00,
0x00,0x00,0xF8,0xCC,0xCC,0xCC,0xCC,0x00,0x00,0x00,0x78,0xCC,0xCC,0xCC,0x78,0x00,
0x00,0x00,0xDC,0x66,0x66,0x7C,0x60,0xF0,0x00,0x00,0x76,0xCC,0xCC,0x7C,0x0C,0x1E,
0x00,0x00,0xDC,0x76,0x66,0x60,0xF0,0x00,0x00,0x00,0x7C,0xC0,0x78,0x0C,0xF8,0x00,
0x10,0x30,0x7C,0x30,0x30,0x34,0x18,0x00,0x00,0x00,0xCC,0xCC,0xCC,0xCC,0x76,0x00,
0x00,0x00,0xCC,0xCC,0xCC,0x78,0x30,0x00,0x00,0x00,0xC6,0xD6,0xFE,0xFE,0x6C,0x00,
0x00,0x00,0xC6,0x6C,0x38,0x6C,0xC6,0x00,0x00,0x00,0xCC,0xCC,0xCC,0x7C,0x0C,0xF8,
0x00,0x00,0xFC,0x98,0x30,0x64,0xFC,0x00,0x1C,0x30,0x30,0xE0,0x30,0x30,0x1C,0x00,
0x18,0x18,0x18,0x00,0x18,0x18,0x18,0x00,0xE0,0x30,0x30,0x1C,0x30,0x30,0xE0,0x00,
0x76,0xDC,0x00,0x00,0x00,0x00,0x00,0x00,0x55,0xAA,0x55,0xAA,0x55,0xAA,0x55,0xAA,
};
#define EXPANDED_MEMORY 8
#define MEMSIZE ((EXPANDED_MEMORY+1)*0x10000)
#define GET16(p) (((p)[0]<<8)|(p)[1])
#define PUT16(p,q) ((p)[0]=(q)>>8,(p)[1]=(q))
typedef struct {
Uint8 p;
Uint8 d[256];
} Stack;
typedef struct Device {
Uint8 d[16];
Uint8(*in)(struct Device*,Uint8);
void(*out)(struct Device*,Uint8);
void(*exp)(struct Device*,Uint16);
void*aux;
} Device;
typedef struct {
FILE*file;
DIR*dir;
char name[4096];
struct dirent*de;
Uint8 mode;
} UxnFile;
typedef struct {
Uint32 envtime,phase,freq;
Uint32 length,end,pos;
Uint32 env[4];
Uint8 vol[2];
} UxnAudio;
typedef struct {
Uint8*data;
Uint32 addr;
Uint16 len;
Uint8 kind,stage;
} Script;
static SDL_Color colors[64]={
// 0
{0xFF,0xFF,0xFF,0},
{0x00,0x00,0x00,0},
{0x00,0xFF,0xFF,0},
{0xFF,0x00,0x00,0},
{0xAA,0xAA,0xAA,0},
{0x43,0x43,0x33,0},
{0x43,0xAA,0xAA,0},
{0xAA,0x43,0x33,0},
// 1
{0x00,0x00,0x00,0},
{0xFF,0xFF,0xFF,0},
{0x00,0xFF,0xFF,0},
{0xFF,0x00,0x00,0},
{0x43,0x43,0x33,0},
{0xAA,0xAA,0xAA,0},
{0x43,0xAA,0xAA,0},
{0xAA,0x43,0x33,0},
// 2
{0x10,0x30,0x10,0},
{0x60,0xE0,0x60,0},
{0x60,0x60,0xE0,0},
{0xE0,0x60,0x60,0},
{0x10,0x80,0x10,0},
{0x38,0xFF,0xF8,0},
{0xF8,0x38,0xFF,0},
{0xFF,0xF8,0x38,0},
// 3
{0x55,0x55,0x55,0},
{0xFF,0x55,0x00,0},
{0x00,0x00,0x00,0},
{0xFF,0xFF,0xFF,0},
{0x55,0x55,0x55,0},
{0xFF,0x55,0x00,0},
{0x00,0x00,0x00,0},
{0xFF,0xFF,0xFF,0},
// 4
{0x55,0x55,0x55,0},
{0xFF,0x55,0x00,0},
{0xFF,0xFF,0xFF,0},
{0x00,0x00,0x00,0},
{0x55,0x55,0x55,0},
{0xFF,0x55,0x00,0},
{0xFF,0xFF,0xFF,0},
{0x00,0x00,0x00,0},
// 5
{0xFF,0xFF,0xFF,0},
{0xAA,0xAA,0xAA,0},
{0x55,0x55,0x55,0},
{0x00,0x00,0x00,0},
{0xFF,0x80,0x00,0},
{0xC6,0x60,0x00,0},
{0x94,0x40,0x00,0},
{0x72,0x20,0x00,0},
// 6
{0xAA,0xAA,0xAA,0},
{0x00,0x00,0x00,0},
{0xAA,0xAA,0xAA,0},
{0x00,0x00,0x00,0},
{0x91,0xAA,0x9A,0},
{0x0D,0x0E,0x0E,0},
{0x91,0xAA,0x9A,0},
{0x19,0x15,0x00,0},
// 7
{0xFF,0xFF,0xFF,0},
{0x00,0x00,0x00,0},
{0x77,0xCC,0xAA,0},
{0x99,0x22,0x44,0},
{0xFF,0xFF,0xFF,0},
{0x00,0x00,0x00,0},
{0x77,0xCC,0xAA,0},
{0x99,0x22,0x44,0},
};
static Uint8 blend[4][16]={
{4,0,0,0,1,4,1,1,2,2,4,2,3,3,3,4},
{0,1,2,3,0,1,2,3,0,1,2,3,0,1,2,3},
{1,2,3,1,1,2,3,1,1,2,3,1,1,2,3,1},
{2,3,1,2,2,3,1,2,2,3,1,2,2,3,1,2},
};
static const Uint32 notes[12]={
0x20000000,0x21e71f26,0x23eb3588,0x260dfc14,0x285145f3,0x2ab70212,
0x2d413ccd,0x2ff221af,0x32cbfd4a,0x35d13f33,0x39047c0f,0x3c686fce,
};
static Uint8 mem[MEMSIZE];
static Stack ds,rs;
static Device device[16];
static Uint16 scr_w,scr_h;
static Uint8*bglayer;
static Uint8*fglayer;
static UxnFile uxnfile0;
static UxnFile uxnfile1;
static FILE*inf;
static FILE*outf;
static const char*rom_name;
static Uint8 use_console=1;
static Uint8 use_screen=1;
static Uint8 use_mouse=1;
static Uint8 use_debug=0;
static Uint8 use_utc=0;
static Uint8 use_extension=0;
static Uint8 use_thread=0;
static Uint8 hide_cursor=0;
static Uint8 allow_write=0;
static Uint8 joypad_repeat=0;
static Uint16 scroll_size=1;
static Uint8 zoom=1;
static Uint8 disallow_size_change=0;
static Sint16 default_width=512;
static Sint16 default_height=320;
static Uint32 scrflags=SDL_SWSURFACE;
static Uint16 timer_rate=16;
static Uint8 paused=0;
static Uint8 picture_changed=0;
static Uint8 size_changed=0;
static volatile Uint8 timer_expired=0;
static SDL_Surface*screen;
static Uint8 layers;
static Uint8 palet=7;
static Uint8 touch_mode=0;
static SDL_cond*stdin_cond;
static Uint8 screencompat=0x03;
static Uint16 scriptc;
static Script*scriptv;
static FILE*scriptf;
static Sint32*audio_option;
static SDL_AudioSpec audiospec;
static Uint8 joy_mask;
static Uint8 joy_player[4];
static Uint8 joy_hat,joy_hat_mode;
static Uint8 joy_axis_x,joy_axis_y,joy_axis_mode;
static Uint8 joy_button_map[128];
static Uint16 joy_sensitivity=8192;
static Uint8 debugger=0;
static Uint16 breakpoint=0;
static Uint16 break_pc=0x0100;
static Uint8 debug_op=0;
static void debug(int i) {
int j;
if(i) fprintf(stderr,"Debug(%02X)\n",i);
fprintf(stderr,"ds:");
for(i=0;i<ds.p;i++) fprintf(stderr," %02X",ds.d[i]);
fputc('\n',stderr);
fprintf(stderr,"rs:");
for(i=0;i<rs.p;i++) fprintf(stderr," %02X",rs.d[i]);
fputc('\n',stderr);
fprintf(stderr," 0. 1. 2. 3. 4. 5. 6. 7. 8. 9. A. B. C. D. E. F.\n");
for(i=0;i<16;i++) {
fprintf(stderr,"%1X:",i);
for(j=0;j<16;j++) fprintf(stderr," %02X",device[i].d[j]);
if(device[i].aux) fprintf(stderr," *");
fputc('\n',stderr);
}
}
static void uxnerr(int n,int pc) {
if(use_debug) debug(-1);
fflush(outf);
fflush(stderr);
errx(2,"Uxn error %d at 0x%04X",n,pc);
}
#define Push8(z) ({ s->d[s->p++]=(z); })
#define Push16(z) ({ s->d[s->p++]=(z)>>8; s->d[s->p++]=(z); })
#define Push(z) ({ if(v&0x20) s->d[s->p++]=(z)>>8; s->d[s->p++]=(z); })
#define Pop8(z) ({ z=s->d[0xFF&--k]; if(v<0x80) s->p=k; })
#define Pop16(z) ({ z=s->d[0xFF&--k]; z|=s->d[0xFF&--k]<<8; if(v<0x80) s->p=k; })
#define Pop(z) ({ if(v&0x20) Pop16(z); else Pop8(z); })
static void run(Uint16 pc) {
Stack*s;
Uint8 k,v;
Uint16 x,y,z;
if(!pc) return;
start:
while(v=mem[pc++]) {
if(pc==breakpoint && use_screen) goto stop;
s=(v&0x40?&rs:&ds);
k=s->p;
switch(v&0x1F?:v) {
case 0x01: Pop(x); Push(x+1); break;
case 0x02: Pop(x); break;
case 0x03: Pop(x); Pop(y); Push(x); break;
case 0x04: Pop(x); Pop(y); Push(x); Push(y); break;
case 0x05: Pop(z); Pop(y); Pop(x); Push(y); Push(z); Push(x); break;
case 0x06: Pop(x); Push(x); Push(x); break;
case 0x07: Pop(x); Pop(y); Push(y); Push(x); Push(y); break;
case 0x08: Pop(x); Pop(y); Push8(y==x?1:0); break;
case 0x09: Pop(x); Pop(y); Push8(y!=x?1:0); break;
case 0x0A: Pop(x); Pop(y); Push8(y>x?1:0); break;
case 0x0B: Pop(x); Pop(y); Push8(y<x?1:0); break;
case 0x0C: Pop(x); jump: if(v&0x20) pc=x; else pc+=(Sint8)x; break;
case 0x0D: Pop(x); Pop8(y); if(y) goto jump; break;
case 0x0E: Pop(x); y=pc; goto stash;
case 0x0F: Pop(x); goto stash;
case 0x10: Pop8(x); peek: if(v&0x20) x=GET16(mem+x); else x=mem[x]; Push(x); break;
case 0x11: Pop8(x); Pop(y); poke: if(v&0x20) PUT16(mem+x,y); else mem[x]=y; break;
case 0x12: Pop8(x); x=pc+(Sint8)x; goto peek; break;
case 0x13: Pop8(x); Pop(y); x=pc+(Sint8)x; goto poke; break;
case 0x14: Pop16(x); goto peek; break;
case 0x15: Pop16(x); Pop(y); goto poke; break;
case 0x16:
Pop8(x);
z=(x>>4)&15; x&=15;
y=device[z].in(device+z,x);
if(v&0x20) y=(y<<8)|device[z].in(device+z,x+1);
Push(y);
break;
case 0x17:
Pop8(x); Pop(y);
z=(x>>4)&15; x&=15;
if(v&0x20) {
device[z].d[x]=y>>8;
device[z].d[(x+1)&15]=y;
device[z].out(device+z,x);
device[z].out(device+z,x+1);
} else {
device[z].d[x]=y;
device[z].out(device+z,x);
}
break;
case 0x18: Pop(x); Pop(y); Push(y+x); break;
case 0x19: Pop(x); Pop(y); Push(y-x); break;
case 0x1A: Pop(x); Pop(y); Push(y*x); break;
case 0x1B: Pop(x); Pop(y); Push(x?y/x:0); break;
case 0x1C: Pop(x); Pop(y); Push(y&x); break;
case 0x1D: Pop(x); Pop(y); Push(y|x); break;
case 0x1E: Pop(x); Pop(y); Push(y^x); break;
case 0x1F: Pop8(x); Pop(y); z=x>>4; x&=15; Push((y>>x)<<z); break;
case 0x20: Pop8(x); pc+=x?GET16(mem+pc)+2:2; break;
case 0x40: pc+=GET16(mem+pc)+2; break;
case 0x60: Push16(pc+2); pc+=GET16(mem+pc)+2; break;
case 0x80: case 0xC0: Push8(mem[pc++]); break;
case 0xA0: case 0xE0: Push8(mem[pc++]); Push8(mem[pc++]); break;
}
continue;
stash:
s=(v&0x40?&ds:&rs);
if(v&1) {
Push(x);
} else {
Push16(y);
if(v&0x20) pc=x; else pc+=(Sint8)x;
}
}
if(pc==breakpoint && use_screen) {
stop:
paused=debugger=picture_changed=1;
break_pc=pc-1;
}
fflush(outf);
}
static void load_rom(void) {
FILE*fp=fopen(rom_name,"r");
if(!fp) err(1,"Cannot load program file");
memset(mem,0,MEMSIZE);
fread(mem+0x0100,1,MEMSIZE-0x0100,fp);
if(ferror(fp)) err(1,"Cannot load program file");
fclose(fp);
}
static Uint8 default_in(Device*misc1,Uint8 misc2) { return misc1->d[misc2&15]; }
static void default_out(Device*misc1,Uint8 misc2) {}
static void default_exp(Device*misc1,Uint16 misc2) {}
static Uint8 system_in(Device*dev,Uint8 id) {
switch(id) {
case 4: return ds.p;
case 5: return rs.p;
default: return dev->d[id];
}
}
static void system_out(Device*dev,Uint8 id) {
Uint16 x;
switch(id) {
case 3:
x=GET16(dev->d+2);
device[mem[x]>>4].exp(device+(mem[x]>>4),x);
break;
case 4:
ds.p=dev->d[4];
break;
case 5:
rs.p=dev->d[5];
break;
case 8 ... 13:
colors[070].r=colors[074].r=(dev->d[8]>>4)*0x11;
colors[071].r=colors[075].r=(dev->d[8]&15)*0x11;
colors[072].r=colors[076].r=(dev->d[9]>>4)*0x11;
colors[073].r=colors[077].r=(dev->d[9]&15)*0x11;
colors[070].g=colors[074].g=(dev->d[10]>>4)*0x11;
colors[071].g=colors[075].g=(dev->d[10]&15)*0x11;
colors[072].g=colors[076].g=(dev->d[11]>>4)*0x11;
colors[073].g=colors[077].g=(dev->d[11]&15)*0x11;
colors[070].b=colors[074].b=(dev->d[12]>>4)*0x11;
colors[071].b=colors[075].b=(dev->d[12]&15)*0x11;
colors[072].b=colors[076].b=(dev->d[13]>>4)*0x11;
colors[073].b=colors[077].b=(dev->d[13]&15)*0x11;
if(screen && palet==7) {
SDL_SetColors(screen,colors+palet*8,0,8);
picture_changed=1;
}
break;
case 14: if(dev->d[14] && use_debug) debug(dev->d[14]); break;
case 15: if(dev->d[15]) exit(dev->d[15]&0x7F); break;
}
}
static void console_out(Device*dev,Uint8 id) {
switch(id) {
case 8: fputc(dev->d[8],outf); break;
case 9: fputc(dev->d[9],stderr); break;
}
}
static Uint16 files_stat(int fd,char*name,Uint16 len,Uint8*out) {
struct stat st;
if(strlen(name)+7>len || fstatat(fd,name,&st,0)) return 0;
if(S_ISDIR(st.st_mode)) return snprintf(out,len,"---- %s\n",name);
else if(st.st_size<0x10000) return snprintf(out,len,"%04x %s\n",(unsigned int)st.st_size,name);
else return snprintf(out,len,"???? %s\n",name);
return 0;
}
static Uint32 files_seek(UxnFile*uf,Uint8 mode,Uint32 len) {
switch(uf->mode) {
case 1: case 2: case 4:
switch(mode) {
case 0: fseek(uf->file,len,SEEK_SET); break;
case 1: fseek(uf->file,(Sint32)len,SEEK_CUR); break;
case 2: fseek(uf->file,(Sint32)len,SEEK_END); break;
case 3: return ftell(uf->file);
}
break;
case 3:
if(!mode && !len) rewinddir(uf->dir);
uf->de=0;
break;
}
return 0;
}
static int files_set(Device*dev,int rw) {
// rw: 0(close) 1(read) 2(write) 3(both)
// return: 1 if file opened, 0 if not opened
Uint8 m=dev->d[7];
UxnFile*uf=dev->aux;
if(uf->file) fclose(uf->file);
if(uf->dir) closedir(uf->dir);
uf->file=0;
uf->dir=0;
uf->de=0;
uf->mode=0;
dev->d[2]=dev->d[3]=0;
if(!uf->name[0]) return 0;
if(rw==1) {
if(uf->dir=opendir(uf->name)) {
uf->mode=3;
return 1;
} else if(uf->file=fopen(uf->name,"r")) {
uf->mode=1;
return 1;
} else {
warn("Cannot open file '%s' for reading",uf->name);
}
} else if(rw==2 && allow_write) {
if(uf->file=fopen(uf->name,m?"a":"w")) {
uf->mode=2;
return 1;
} else {
warn("Cannot open file '%s' for writing",uf->name);
}
} else if(rw==3) {
if(allow_write && (uf->file=fopen(uf->name,"r+"))) {
uf->mode=4;
return 1;
} else if(uf->file=fopen(uf->name,"r")) {
uf->mode=1;
return 1;
} else {
warn("Cannot open file '%s' for reading/writing",uf->name);
}
}
return 0;
}
static void files_out(Device*dev,Uint8 id) {
UxnFile*uf=dev->aux;
Uint16 len=GET16(dev->d+10);
Uint16 addr,x,y;
int i;
switch(id) {
case 5:
addr=GET16(dev->d+4);
dev->d[2]=dev->d[3]=0;
if(!uf->name[0]) break;
y=files_stat(AT_FDCWD,uf->name,len,mem+addr);
if(y<=len) PUT16(dev->d+2,y);
break;
case 7:
if(use_extension) files_set(dev,0);
break;
case 9:
addr=GET16(dev->d+8);
files_set(dev,0);
x=GET16(dev->d+8);
for(i=0;i<4095;i++) {
if(!(uf->name[i]=mem[x+i])) break;
// if(mem[x+i]=='/') uf->name[i]=0;
}
if(use_debug) fprintf(stderr,"! File: %s\n",uf->name);
break;
case 13:
addr=GET16(dev->d+12);
dev->d[2]=dev->d[3]=0;
read:
if(uf->mode==1 || uf->mode==4) {
if(!len) break;
x=fread(mem+addr,1,len,uf->file);
PUT16(dev->d+2,x);
if(ferror(uf->file)) {
warn("Error reading file '%s'",uf->name);
clearerr(uf->file);
}
} else if(uf->mode==3) {
do {
if(uf->de) {
if(x=files_stat(dirfd(uf->dir),uf->de->d_name,len,mem+addr)) {
addr+=x;
len-=x;
} else {
break;
}
}
} while(uf->de=readdir(uf->dir));
PUT16(dev->d+2,addr-GET16(dev->d+12));
} else {
if(files_set(dev,1)) goto read;
}
break;
case 15:
addr=GET16(dev->d+14);
dev->d[2]=dev->d[3]=0;
if(!allow_write) {
disallow:
warnx("Not allowed to write to file '%s'.",uf->name);
break;
}
write:
if(uf->mode==2 || uf->mode==4) {
if(!len) break;
x=fwrite(mem+addr,1,len,uf->file);
PUT16(dev->d+2,x);
if(ferror(uf->file)) {
warn("Error writing file '%s'",uf->name);
clearerr(uf->file);
}
} else {
if(files_set(dev,2)) goto write;
}
break;
}
}
static Uint8 files_in(Device*dev,Uint8 id) {
UxnFile*uf=dev->aux;
int c;
switch(id) {
case 12: case 13:
dev->d[2]=dev->d[3]=0;
read:
if(uf->mode==1 || uf->mode==4) {
c=fgetc(uf->file);
if(c==EOF) {
if(ferror(uf->file)) {
warn("Error reading file '%s'",uf->name);
clearerr(uf->file);
}
c=0;
} else {
dev->d[3]=1;
}
return c;
} else if(uf->mode==3) {
return 0;
} else {
if(files_set(dev,1)) goto read;
}
return 0;
default: return dev->d[id];
}
}
static void files_exp(Device*dev,Uint16 addr) {
UxnFile*uf=dev->aux;
Uint32 x;
if(use_extension) switch(mem[addr]&15) {
case 0 ... 2:
x=GET16(mem+addr+1)<<16;
x|=GET16(mem+addr+3);
if(!uf->mode) files_set(dev,3);
files_seek(uf,mem[addr]&15,x);
break;
case 3:
x=files_seek(uf,3,0);
PUT16(mem+addr+1,x>>16);
PUT16(mem+addr+3,x);
break;
}
}
static Uint8 datetime_in(Device*dev,Uint8 id) {
time_t t=time(0);
struct tm r;
if(use_utc) gmtime_r(&t,&r); else localtime_r(&t,&r);
switch(id) {
case 0: return (r.tm_year+1900)>>8;
case 1: return r.tm_year+1900;
case 2: return r.tm_mon;
case 3: return r.tm_mday;
case 4: return r.tm_hour;
case 5: return r.tm_min;
case 6: return r.tm_sec;
case 7: return r.tm_wday;
case 8: return r.tm_yday>>8;
case 9: return r.tm_yday;
case 10: return r.tm_isdst;
default: return dev->d[id];
}
}
static void set_cursor(void) {
if(hide_cursor) SDL_ShowCursor(paused || !use_mouse);
}
static Uint32 timer_callback(Uint32 interval) {
if(!timer_expired) {
SDL_Event e;
timer_expired=1;
e.type=SDL_USEREVENT;
SDL_PushEvent(&e);
timer_expired=1;
}
return interval;
}
static void set_screen_mode(int w,int h) {
picture_changed=size_changed=0;
free(bglayer);
if(screen) SDL_FreeSurface(screen);
if(w<1) w=1;
if(h<1) h=1;
scr_w=w;
scr_h=h;
screen=SDL_SetVideoMode(w*zoom,h*zoom,8,scrflags);
if(!screen) errx(1,"Cannot set screen mode: %s",SDL_GetError());
if(!bglayer) {
if(timer_rate) SDL_SetTimer(timer_rate,timer_callback);
if(audio_option) {
if(SDL_OpenAudio(&audiospec,0)) errx(1,"Cannot initialize SDL audio: %s",SDL_GetError());
SDL_PauseAudio(0);
}
SDL_EnableKeyRepeat(SDL_DEFAULT_REPEAT_DELAY,SDL_DEFAULT_REPEAT_INTERVAL);
SDL_WM_SetCaption(rom_name,rom_name);
set_cursor();
SDL_EnableUNICODE(1);
}
SDL_SetColors(screen,colors+palet*8,0,8);
bglayer=calloc(w*h,2);
if(!bglayer) err(1,"Memory allocation error");
fglayer=bglayer+w*h;
}
static void screen_fill(Uint8*p,Uint8 v,Uint16 x0,Uint16 y0,Uint16 x1,Uint16 y1) {
if(y1>scr_h) y1=scr_h;
if(x1>scr_w) x1=scr_w;
if(y0>=y1 || x0>=x1) return;
p+=y0*scr_w+x0;
x1-=x0;
while(y0++<y1) memset(p,v,x1),p+=scr_w;
}
static void draw_sprite(Uint16 x,Uint16 y,Uint16 addr,Uint8 v) {
Uint8 b=v&0x80;
Uint8 u;
Uint16 c;
Uint8*p=v&0x40?fglayer:bglayer;
Uint8*m;
if(x+8>scr_w || y+8>scr_h || addr>0x10000-(b?16:8)) return;
p+=y*scr_w+x;
m=mem+addr;
for(y=0;y<8;y++) {
c=m[y]|(b?m[y+8]<<8:0);
for(x=0;x<8;x++) {
u=(c&1)|((c>>7)&2);
c>>=1;
if((u=blend[u][v&0x0F])!=4) p[(y^(v&0x20?7:0))*scr_w+(x^(v&0x10?0:7))]=u;
}
}
}
static void screen_out(Device*dev,Uint8 id) {
int i,fx,fy;
Uint16 w;
Uint16 x=GET16(dev->d+8);
Uint16 y=GET16(dev->d+10);
Uint8 z=dev->d[id];
if(id<6 && disallow_size_change) {
PUT16(dev->d+2,scr_w);
PUT16(dev->d+4,scr_h);
return;
}
switch(id) {
case 2: case 3:
x=GET16(dev->d+2);
if(x!=scr_w) scr_w=x,size_changed=1;
break;
case 4: case 5:
x=GET16(dev->d+4);
if(x!=scr_h) scr_h=x,size_changed=1;
break;
case 14:
if(size_changed) set_screen_mode(scr_w,scr_h);
picture_changed=1;
if(z<0x80) {
if(x<scr_w && y<scr_h) (z&0x40?fglayer:bglayer)[x+y*scr_w]=z&3;
if(dev->d[6]&0x01) PUT16(dev->d+8,x+1);
if(dev->d[6]&0x02) PUT16(dev->d+10,y+1);
} else {
screen_fill(z&0x40?fglayer:bglayer,z&3,dev->d[14]&0x10?0:x,dev->d[14]&0x20?0:y,dev->d[14]&0x10?x:scr_w,dev->d[14]&0x20?y:scr_h);
}
break;
case 15:
if(size_changed) set_screen_mode(scr_w,scr_h);
picture_changed=1;
w=GET16(dev->d+12);
fx=((z&0x10)&&(screencompat&0x02)?-8:8);
fy=((z&0x20)&&(screencompat&0x02)?-8:8);
for(i=0;i<=(dev->d[6]>>4);i++) {
draw_sprite(x+i*(dev->d[6]&0x02?fx:0),y+i*(dev->d[6]&0x01?fy:0),w,z);
if(dev->d[6]&0x04) w+=z&0x80?16:8;
}
if(dev->d[6]&0x01) PUT16(dev->d+8,x+fx);
if(dev->d[6]&0x02) PUT16(dev->d+10,y+fy);
if(dev->d[6]&0x04) PUT16(dev->d+12,w);
break;
}
}
static void audio_out(Device*dev,Uint8 id) {
UxnAudio*a;
Uint32 s,n;
if(id!=15) return;
if(use_screen) SDL_LockAudio();
a=dev->aux;
a->env[0]=(dev->d[8]>>4)*audio_option['e'-'a'];
a->env[1]=(dev->d[8]&15)*audio_option['e'-'a'];
a->env[2]=(dev->d[9]>>4)*audio_option['e'-'a'];
a->env[3]=(dev->d[9]&15)*audio_option['e'-'a'];
a->length=n=GET16(dev->d+10);
a->pos=s=GET16(dev->d+12);
a->end=s+n;
if(dev->d[15]&0x80) a->length=0;
a->envtime=0;
a->phase=0;
s=(dev->d[15]&0x7F)+audio_option['n'-'a'];
s=notes[s%12]>>(10-s/12);
if(n<256) s=(n*(unsigned long long)s)>>8;
if(use_extension && (dev->d[6] || dev->d[7])) s=(((unsigned long long)s)*(0x10000+GET16(dev->d+6)))>>16;
a->freq=s;
if(audiospec.channels==1) {
a->vol[0]=a->vol[1]=((dev->d[14]&15)+(dev->d[14]>>4))/2;
} else {
a->vol[0]=dev->d[14]>>4;
a->vol[1]=dev->d[14]&15;
}
if(use_screen) SDL_UnlockAudio();
}
static Uint32 envelope(const UxnAudio*a) {
// Returns a number from 0 to 64.
Uint32 t=a->envtime;
if(!(a->env[0]|a->env[1]|a->env[2]|a->env[3])) return 64;
if(t<a->env[0]) return ((64*t)/a->env[0])?:1;
t-=a->env[0];
if(t<a->env[1]) return 64-((32*t)/a->env[1]);
t-=a->env[1];
if(t<a->env[2]) return 32;
t-=a->env[2];
if(t<a->env[3]) return 32-((32*t)/a->env[3]);
return 0;
}
static void audio_callback(void*userdata,Uint8*stream,int len) {
Uint8 c=audiospec.channels;
Uint32 vol=audio_option['m'-'a']?0:audio_option['v'-'a'];
Sint16*buf=(void*)stream;
UxnAudio*a;
Uint32 o0,o1,d,n,e;
len>>=1;
for(n=0;n<len;n+=c) {
o0=o1=0;
for(d=3;d<7;d++) {
a=device[d].aux;
if(a->pos>=a->end && !a->length) continue;
e=envelope(a);
if(!e) {
a->pos=a->length=a->end=0;
continue;
}
a->envtime++;
e*=(Sint8)(mem[a->pos]^0x80);
a->phase+=a->freq;
if(a->phase>=0x1000000) {
a->pos+=a->phase>>24;
a->phase&=0xFFFFFF;
while(a->pos>=a->end && a->length) a->pos-=a->length;
}
o0+=e*a->vol[0];
o1+=e*a->vol[1];
}
buf[n]=(o0*vol)>>12;
if(c==2) buf[n+1]=(o1*vol)>>12;
}
}
static void run_audio(void) {
Uint8 c=audiospec.channels;
Uint32 vol=audio_option['m'-'a']?0:audio_option['v'-'a'];
Uint32 fram=(timer_rate*(long long)audiospec.freq)/1000;
Uint8 q=0;
Uint32 f=0;
UxnAudio*a;
Uint32 o0,o1,d,e;
for(;;) {
if(++f==fram) {
f=0;
run(GET16(device[2].d));
}
if(q) {
for(d=3;d<7;d++) if(q&(1<<d)) run(GET16(device[d].d));
q=0;
}
//TODO: check for input from stdin
o0=o1=0;
for(d=3;d<7;d++) {
a=device[d].aux;
if(a->pos>=a->end && !a->length) {
end:
if(a->length) q|=1<<d;
a->pos=a->length=a->end=0;
continue;
}
e=envelope(a);
if(!e) goto end;
a->envtime++;
e*=(Sint8)(mem[a->pos]^0x80);
a->phase+=a->freq;
if(a->phase>=0x1000000) {
a->pos+=a->phase>>24;
a->phase&=0xFFFFFF;
while(a->pos>=a->end && a->length) a->pos-=a->length;
}
o0+=e*a->vol[0];
o1+=e*a->vol[1];
}
d=(o0*vol)>>12; putchar(d>>8); putchar(d);
if(c==2) {
d=(o1*vol)>>12; putchar(d>>8); putchar(d);
}
}
}
static void do_extension_by_uuid(Uint16 addr) {
static const Uint8 uuid_8color[]="\x80\x17\x51\x32\xE2\x63\x11\xED\xB8\xC9\x00\x26\x18\x74\x54\x16";
static const Uint8 uuid_screencompat[]="\x97\x0B\x5A\x0C\x2C\x44\x11\xEE\xAC\x3B\x00\x26\x18\x74\x54\x16";
int i;
if(mem[addr+1]==0x00 && use_screen && !memcmp(mem+addr+2,uuid_8color,16)) {
for(i=0;i<8;i++) {
colors[i+070].r=(mem[addr+19+i+i]>>4)*0x11;
colors[i+070].g=(mem[addr+19+i+i]&15)*0x11;
colors[i+070].b=(mem[addr+20+i+i]>>4)*0x11;
}
if(palet==7) {
SDL_SetColors(screen,colors+palet*8,0,8);
picture_changed=1;
}
mem[addr+18]=1;
} else if(mem[addr+1]==0x20 && use_screen && !memcmp(mem+addr+2,uuid_screencompat,16)) {
screencompat=mem[addr+19];
blend[0][0]=(screencompat&0x01?4:0);
mem[addr+18]=1;
}
}
static void system_exp(Device*dev,Uint16 addr) {
Uint32 src,dst;
Uint16 len,n;
switch(mem[addr]) {
case 0x00:
len=GET16(mem+addr+1);
dst=(GET16(mem+addr+3)<<16L)|(GET16(mem+addr+5));
if(dst<MEMSIZE && dst+len<=MEMSIZE) {
memset(mem+dst,mem[addr+7],len);
} else {
if(use_debug) fprintf(stderr,"! Access expanded memory out of range\n");
}
break;
case 0x01: case 0x02:
len=GET16(mem+addr+1);
src=(GET16(mem+addr+3)<<16L)|(GET16(mem+addr+5));
dst=(GET16(mem+addr+7)<<16L)|(GET16(mem+addr+9));
if(dst<MEMSIZE && src+len<=MEMSIZE && dst+len<=MEMSIZE) {
if(mem[addr]==0x01) {
for(n=0;n<len;n++) mem[dst+n]=mem[src+n];
} else {
for(n=len;n;n--) mem[dst+n-1]=mem[src+n-1];
}
} else {
if(use_debug) fprintf(stderr,"! Access expanded memory out of range\n");
}
break;
case 0x03:
if(!use_extension) break;
mem[addr+18]=0;
do_extension_by_uuid(addr);
break;
case 0x04:
if(!use_extension) break;
PUT16(mem+addr+1,EXPANDED_MEMORY);
break;
}
}
static void debug_screen(Uint8*s,Uint8 k) {
static Sint8 page=0;
static Uint8 port=0;
static Uint8 din;
static Uint32 addr=0;
static Uint32 scrol=0;
static const char opname[]=
"?IPNSRDOENGLJJJSLSLSLSDDASMDAOES"
"?NOIWOUVQETTMCSTDTDTDTEEDUUINROF"
"?CPPPTPRUQHHPNRHZZRRAAIODBLVDART"
;
char buf[81];
int i,j;
Stack*z;
FILE*f;
UxnFile*u;
if(s) {
memset(s,32,80*25);
show:
switch(page) {
case 0:
memcpy(s+80*0,buf,snprintf(buf,81,"* %s",rom_name));
memcpy(s+80*1,buf,snprintf(buf,81,"<c> Console: %s",use_console?"On":"Off"));
memcpy(s+80*2,buf,snprintf(buf,81,"<d> Debug: %s",use_debug?"On":"Off"));
memcpy(s+80*3,buf,snprintf(buf,81,"<F2> Sound: %s",audio_option?(audio_option['m'-'a']?"Mute":"On"):"N/A"));
memcpy(s+80*4,buf,snprintf(buf,81,"<F3> Mouse: %s",use_mouse?"On":"Off"));
memcpy(s+80*5,buf,snprintf(buf,81,"<F4> Layers: %s",layers?(layers==1?"fg":"bg"):"fg/bg"));
memcpy(s+80*6,buf,snprintf(buf,81,"<F6/F7> Palette: %d",palet));
memcpy(s+80*7,buf,snprintf(buf,81,"<F9> Restart"));
memcpy(s+80*8,buf,snprintf(buf,81,"<F10> Quit"));
if(audio_option) memcpy(s+80*9,buf,snprintf(buf,81,"<-/+> Volume: %d",(int)audio_option['v'-'a']));
memcpy(s+80*10,buf,snprintf(buf,81,"<PAUSE> Resume"));
memcpy(s+80*13,buf,snprintf(buf,81,"Pages: CTRL+"));
memcpy(s+80*14,buf,snprintf(buf,81," A:Stack B:Return C:Device D:Memory E:Files "));
memcpy(s+80*15,buf,snprintf(buf,81," F:Code G: N: O: P: "));
memcpy(s+80*16,buf,snprintf(buf,81," Q: R: S: T: U: "));
memcpy(s+80*17,buf,snprintf(buf,81," V: W: X: Y: Z:Main "));
break;
case 1: case 2:
if(page==1) z=&ds; else z=&rs;
memcpy(s,buf,snprintf(buf,81,"%s Stack (%02x)",page==1?"Data":"Return",z->p));
for(i=0;i<256;i++) memcpy(s+80*(i/16+1)+(i&15)*4,buf,snprintf(buf,81,"%c%02x%c",z->p==i?'[':' ',z->d[i],z->p==i?']':' '));
break;
case 3:
memcpy(s,buf,snprintf(buf,81,"-- -0 -1 -2 -3 -4 -5 -6 -7 -8 -9 -a -b -c -d -e -f"));