ref: 18b7b2fa6fe5ef02966d57c9d76f25becc9b8999
dir: /sim.c/
#include "sim.h"
#include "gbuffer.h"
//////// Utilities
static Glyph const glyph_table[36] = {
'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', // 0-11
'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', // 12-23
'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z', // 24-35
};
enum { Glyphs_index_count = sizeof glyph_table };
static inline Glyph glyph_of(Usz index) {
assert(index < Glyphs_index_count);
return glyph_table[index];
}
static U8 const index_table[128] = {
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 0-15
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 16-31
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 32-47
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 0, 0, 0, 0, 0, // 48-63
0, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, // 64-79
25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 0, 0, 0, 0, 0, // 80-95
0, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, // 96-111
25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 0, 0, 0, 0, 0}; // 112-127
static ORCA_FORCEINLINE Usz index_of(Glyph c) { return index_table[c & 0x7f]; }
// Reference implementation:
// static Usz index_of(Glyph c) {
// if (c >= '0' && c <= '9') return (Usz)(c - '0');
// if (c >= 'A' && c <= 'Z') return (Usz)(c - 'A' + 10);
// if (c >= 'a' && c <= 'z') return (Usz)(c - 'a' + 10);
// return 0;
// }
static ORCA_FORCEINLINE bool glyph_is_lowercase(Glyph g) { return g & 1 << 5; }
static ORCA_FORCEINLINE Glyph glyph_lowered_unsafe(Glyph g) {
return (Glyph)(g | 1 << 5);
}
static inline Glyph glyph_with_case(Glyph g, Glyph caser) {
enum { Case_bit = 1 << 5, Alpha_bit = 1 << 6 };
return (Glyph)((g & ~Case_bit) | ((~g & Alpha_bit) >> 1) |
(caser & Case_bit));
}
static ORCA_PURE bool oper_has_neighboring_bang(Glyph const *gbuf, Usz h, Usz w,
Usz y, Usz x) {
Glyph const *gp = gbuf + w * y + x;
if (x < w - 1 && gp[1] == '*')
return true;
if (x > 0 && *(gp - 1) == '*')
return true;
if (y < h - 1 && gp[w] == '*')
return true;
// note: negative array subscript on rhs of short-circuit, may cause ub if
// the arithmetic under/overflows, even if guarded the guard on lhs is false
if (y > 0 && *(gp - w) == '*')
return true;
return false;
}
// Returns UINT8_MAX if not a valid note.
static U8 midi_note_number_of(Glyph g) {
int sharp = (g & 1 << 5) >> 5; // sharp=1 if lowercase
g &= ~(1 << 5); // make uppercase
if (g < 'A' || g > 'Z') // A through Z only
return UINT8_MAX;
// We want C=0, D=1, E=2, etc. A and B are equivalent to H and I.
int deg = g <= 'B' ? 'G' - 'B' + g - 'A' : g - 'C';
return (U8)(deg / 7 * 12 + (I8[]){0, 2, 4, 5, 7, 9, 11}[deg % 7] + sharp);
}
typedef struct {
Glyph *vars_slots;
Oevent_list *oevent_list;
Usz random_seed;
} Oper_extra_params;
static void oper_poke_and_stun(Glyph *restrict gbuffer, Mark *restrict mbuffer,
Usz height, Usz width, Usz y, Usz x, Isz delta_y,
Isz delta_x, Glyph g) {
Isz y0 = (Isz)y + delta_y;
Isz x0 = (Isz)x + delta_x;
if (y0 < 0 || x0 < 0 || (Usz)y0 >= height || (Usz)x0 >= width)
return;
Usz offs = (Usz)y0 * width + (Usz)x0;
gbuffer[offs] = g;
mbuffer[offs] |= Mark_flag_sleep;
}
// For anyone editing this in the future: the "no inline" here is deliberate.
// You may think that inlining is always faster. Or even just letting the
// compiler decide. You would be wrong. Try it. If you really want this VM to
// run faster, you will need to use computed goto or assembly.
#define OPER_FUNCTION_ATTRIBS ORCA_NOINLINE static void
#define BEGIN_OPERATOR(_oper_name) \
OPER_FUNCTION_ATTRIBS oper_behavior_##_oper_name( \
Glyph *const restrict gbuffer, Mark *const restrict mbuffer, \
Usz const height, Usz const width, Usz const y, Usz const x, \
Usz Tick_number, Oper_extra_params *const extra_params, \
Mark const cell_flags, Glyph const This_oper_char) { \
(void)gbuffer; \
(void)mbuffer; \
(void)height; \
(void)width; \
(void)y; \
(void)x; \
(void)Tick_number; \
(void)extra_params; \
(void)cell_flags; \
(void)This_oper_char;
#define END_OPERATOR }
#define PEEK(_delta_y, _delta_x) \
gbuffer_peek_relative(gbuffer, height, width, y, x, _delta_y, _delta_x)
#define POKE(_delta_y, _delta_x, _glyph) \
gbuffer_poke_relative(gbuffer, height, width, y, x, _delta_y, _delta_x, \
_glyph)
#define STUN(_delta_y, _delta_x) \
mbuffer_poke_relative_flags_or(mbuffer, height, width, y, x, _delta_y, \
_delta_x, Mark_flag_sleep)
#define POKE_STUNNED(_delta_y, _delta_x, _glyph) \
oper_poke_and_stun(gbuffer, mbuffer, height, width, y, x, _delta_y, \
_delta_x, _glyph)
#define LOCK(_delta_y, _delta_x) \
mbuffer_poke_relative_flags_or(mbuffer, height, width, y, x, _delta_y, \
_delta_x, Mark_flag_lock)
#define IN Mark_flag_input
#define OUT Mark_flag_output
#define NONLOCKING Mark_flag_lock
#define PARAM Mark_flag_haste_input
#define LOWERCASE_REQUIRES_BANG \
if (glyph_is_lowercase(This_oper_char) && \
!oper_has_neighboring_bang(gbuffer, height, width, y, x)) \
return
#define STOP_IF_NOT_BANGED \
if (!oper_has_neighboring_bang(gbuffer, height, width, y, x)) \
return
#define PORT(_delta_y, _delta_x, _flags) \
mbuffer_poke_relative_flags_or(mbuffer, height, width, y, x, _delta_y, \
_delta_x, (_flags) ^ Mark_flag_lock)
//////// Operators
#define UNIQUE_OPERATORS(_) \
_('!', midicc) \
_('#', comment) \
_('%', midi) \
_('*', bang) \
_(':', midi) \
_(';', udp) \
_('=', osc) \
_('?', midipb)
#define ALPHA_OPERATORS(_) \
_('A', add) \
_('B', bounce) \
_('C', clock) \
_('D', delay) \
_('E', movement) \
_('F', if) \
_('G', generator) \
_('H', halt) \
_('I', increment) \
_('J', jump) \
_('K', konkat) \
_('L', lesser) \
_('M', multiply) \
_('N', movement) \
_('O', offset) \
_('P', push) \
_('Q', query) \
_('R', random) \
_('S', movement) \
_('T', track) \
_('U', uclid) \
_('V', variable) \
_('W', movement) \
_('X', teleport) \
_('Y', yump) \
_('Z', lerp)
BEGIN_OPERATOR(movement)
if (glyph_is_lowercase(This_oper_char) &&
!oper_has_neighboring_bang(gbuffer, height, width, y, x))
return;
Isz delta_y, delta_x;
switch (glyph_lowered_unsafe(This_oper_char)) {
case 'n':
delta_y = -1;
delta_x = 0;
break;
case 'e':
delta_y = 0;
delta_x = 1;
break;
case 's':
delta_y = 1;
delta_x = 0;
break;
case 'w':
delta_y = 0;
delta_x = -1;
break;
default:
// could cause strict aliasing problem, maybe
delta_y = 0;
delta_x = 0;
break;
}
Isz y0 = (Isz)y + delta_y;
Isz x0 = (Isz)x + delta_x;
if (y0 >= (Isz)height || x0 >= (Isz)width || y0 < 0 || x0 < 0) {
gbuffer[y * width + x] = '*';
return;
}
Glyph *restrict g_at_dest = gbuffer + (Usz)y0 * width + (Usz)x0;
if (*g_at_dest == '.') {
*g_at_dest = This_oper_char;
gbuffer[y * width + x] = '.';
mbuffer[(Usz)y0 * width + (Usz)x0] |= Mark_flag_sleep;
} else {
gbuffer[y * width + x] = '*';
}
END_OPERATOR
BEGIN_OPERATOR(midicc)
for (Usz i = 1; i < 4; ++i) {
PORT(0, (Isz)i, IN);
}
STOP_IF_NOT_BANGED;
Glyph channel_g = PEEK(0, 1);
Glyph control_g = PEEK(0, 2);
Glyph value_g = PEEK(0, 3);
if (channel_g == '.' || control_g == '.')
return;
Usz channel = index_of(channel_g);
if (channel > 15)
return;
Oevent_midi_cc *oe =
(Oevent_midi_cc *)oevent_list_alloc_item(extra_params->oevent_list);
oe->oevent_type = Oevent_type_midi_cc;
oe->channel = (U8)channel;
oe->control = (U8)index_of(control_g);
oe->value = (U8)(index_of(value_g) * 127 / 35); // 0~35 -> 0~127
END_OPERATOR
BEGIN_OPERATOR(comment)
// restrict probably ok here...
Glyph const *restrict gline = gbuffer + y * width;
Mark *restrict mline = mbuffer + y * width;
Usz max_x = x + 255;
if (width < max_x)
max_x = width;
for (Usz x0 = x + 1; x0 < max_x; ++x0) {
Glyph g = gline[x0];
mline[x0] |= (Mark)Mark_flag_lock;
if (g == '#')
break;
}
END_OPERATOR
BEGIN_OPERATOR(bang)
gbuffer_poke(gbuffer, height, width, y, x, '.');
END_OPERATOR
BEGIN_OPERATOR(midi)
for (Usz i = 1; i < 6; ++i) {
PORT(0, (Isz)i, IN);
}
STOP_IF_NOT_BANGED;
Glyph channel_g = PEEK(0, 1);
Glyph octave_g = PEEK(0, 2);
Glyph note_g = PEEK(0, 3);
Glyph velocity_g = PEEK(0, 4);
Glyph length_g = PEEK(0, 5);
U8 octave_num = (U8)index_of(octave_g);
if (octave_num == 0)
return;
if (octave_num > 9)
octave_num = 9;
U8 note_num = midi_note_number_of(note_g);
if (note_num == UINT8_MAX)
return;
Usz channel_num = index_of(channel_g);
if (channel_num > 15)
channel_num = 15;
Usz vel_num;
if (velocity_g == '.') {
// If no velocity is specified, set it to full.
vel_num = 127;
} else {
vel_num = index_of(velocity_g);
// MIDI notes with velocity zero are actually note-offs. (MIDI has two ways
// to send note offs. Zero-velocity is the alternate way.) If there is a zero
// velocity, we'll just not do anything.
if (vel_num == 0)
return;
vel_num = vel_num * 8 - 1; // 1~16 -> 7~127
if (vel_num > 127)
vel_num = 127;
}
Oevent_midi_note *oe =
(Oevent_midi_note *)oevent_list_alloc_item(extra_params->oevent_list);
oe->oevent_type = (U8)Oevent_type_midi_note;
oe->channel = (U8)channel_num;
oe->octave = octave_num;
oe->note = note_num;
oe->velocity = (U8)vel_num;
// Mask used here to suppress bad GCC Wconversion for bitfield. This is bad
// -- we should do something smarter than this.
oe->duration = (U8)(index_of(length_g) & 0x7Fu);
oe->mono = This_oper_char == '%' ? 1 : 0;
END_OPERATOR
BEGIN_OPERATOR(udp)
Usz n = width - x - 1;
if (n > 16)
n = 16;
Glyph const *restrict gline = gbuffer + y * width + x + 1;
Mark *restrict mline = mbuffer + y * width + x + 1;
Glyph cpy[Oevent_udp_string_count];
Usz i;
for (i = 0; i < n; ++i) {
Glyph g = gline[i];
if (g == '.')
break;
cpy[i] = g;
mline[i] |= Mark_flag_lock;
}
n = i;
STOP_IF_NOT_BANGED;
Oevent_udp_string *oe =
(Oevent_udp_string *)oevent_list_alloc_item(extra_params->oevent_list);
oe->oevent_type = (U8)Oevent_type_udp_string;
oe->count = (U8)n;
for (i = 0; i < n; ++i) {
oe->chars[i] = cpy[i];
}
END_OPERATOR
BEGIN_OPERATOR(osc)
PORT(0, 1, IN | PARAM);
PORT(0, 2, IN | PARAM);
Usz len = index_of(PEEK(0, 2));
if (len > Oevent_osc_int_count)
len = Oevent_osc_int_count;
for (Usz i = 0; i < len; ++i) {
PORT(0, (Isz)i + 3, IN);
}
STOP_IF_NOT_BANGED;
Glyph g = PEEK(0, 1);
if (g != '.') {
U8 buff[Oevent_osc_int_count];
for (Usz i = 0; i < len; ++i) {
buff[i] = (U8)index_of(PEEK(0, (Isz)i + 3));
}
Oevent_osc_ints *oe =
&oevent_list_alloc_item(extra_params->oevent_list)->osc_ints;
oe->oevent_type = (U8)Oevent_type_osc_ints;
oe->glyph = g;
oe->count = (U8)len;
for (Usz i = 0; i < len; ++i) {
oe->numbers[i] = buff[i];
}
}
END_OPERATOR
BEGIN_OPERATOR(midipb)
for (Usz i = 1; i < 4; ++i) {
PORT(0, (Isz)i, IN);
}
STOP_IF_NOT_BANGED;
Glyph channel_g = PEEK(0, 1);
Glyph msb_g = PEEK(0, 2);
Glyph lsb_g = PEEK(0, 3);
if (channel_g == '.')
return;
Usz channel = index_of(channel_g);
if (channel > 15)
return;
Oevent_midi_pb *oe =
(Oevent_midi_pb *)oevent_list_alloc_item(extra_params->oevent_list);
oe->oevent_type = Oevent_type_midi_pb;
oe->channel = (U8)channel;
oe->msb = (U8)(index_of(msb_g) * 127 / 35); // 0~35 -> 0~127
oe->lsb = (U8)(index_of(lsb_g) * 127 / 35);
END_OPERATOR
BEGIN_OPERATOR(add)
LOWERCASE_REQUIRES_BANG;
PORT(0, -1, IN | PARAM);
PORT(0, 1, IN);
PORT(1, 0, OUT);
Glyph a = PEEK(0, -1);
Glyph b = PEEK(0, 1);
Glyph g = glyph_table[(index_of(a) + index_of(b)) % Glyphs_index_count];
POKE(1, 0, glyph_with_case(g, b));
END_OPERATOR
BEGIN_OPERATOR(bounce)
LOWERCASE_REQUIRES_BANG;
PORT(0, -1, IN | PARAM);
PORT(0, 1, IN);
PORT(1, 0, OUT);
Glyph a = PEEK(0, -1);
Glyph b = PEEK(0, 1);
Isz val = (Isz)index_of(b) - (Isz)index_of(a);
if (val < 0)
val = -val;
POKE(1, 0, glyph_with_case(glyph_of((Usz)val), b));
END_OPERATOR
BEGIN_OPERATOR(clock)
LOWERCASE_REQUIRES_BANG;
PORT(0, -1, IN | PARAM);
PORT(0, 1, IN);
PORT(1, 0, OUT);
Usz rate = index_of(PEEK(0, -1));
Usz mod_num = index_of(PEEK(0, 1));
if (rate == 0)
rate = 1;
if (mod_num == 0)
mod_num = 8;
Glyph g = glyph_of(Tick_number / rate % mod_num);
POKE(1, 0, g);
END_OPERATOR
BEGIN_OPERATOR(delay)
LOWERCASE_REQUIRES_BANG;
PORT(0, -1, IN | PARAM);
PORT(0, 1, IN);
PORT(1, 0, OUT);
Usz rate = index_of(PEEK(0, -1));
Usz mod_num = index_of(PEEK(0, 1));
if (rate == 0)
rate = 1;
if (mod_num == 0)
mod_num = 8;
Glyph g = Tick_number % (rate * mod_num) == 0 ? '*' : '.';
POKE(1, 0, g);
END_OPERATOR
BEGIN_OPERATOR(if)
LOWERCASE_REQUIRES_BANG;
PORT(0, -1, IN | PARAM);
PORT(0, 1, IN);
PORT(1, 0, OUT);
Glyph g0 = PEEK(0, -1);
Glyph g1 = PEEK(0, 1);
POKE(1, 0, g0 == g1 ? '*' : '.');
END_OPERATOR
BEGIN_OPERATOR(generator)
LOWERCASE_REQUIRES_BANG;
Isz out_x = (Isz)index_of(PEEK(0, -3));
Isz out_y = (Isz)index_of(PEEK(0, -2)) + 1;
Isz len = (Isz)index_of(PEEK(0, -1));
PORT(0, -3, IN | PARAM); // x
PORT(0, -2, IN | PARAM); // y
PORT(0, -1, IN | PARAM); // len
for (Isz i = 0; i < len; ++i) {
PORT(0, i + 1, IN);
PORT(out_y, out_x + i, OUT | NONLOCKING);
Glyph g = PEEK(0, i + 1);
POKE_STUNNED(out_y, out_x + i, g);
}
END_OPERATOR
BEGIN_OPERATOR(halt)
LOWERCASE_REQUIRES_BANG;
PORT(1, 0, OUT);
END_OPERATOR
BEGIN_OPERATOR(increment)
LOWERCASE_REQUIRES_BANG;
PORT(0, -1, IN | PARAM);
PORT(0, 1, IN);
PORT(1, 0, IN | OUT);
Glyph g = PEEK(0, -1);
Usz rate = 1;
if (g != '.' && g != '*')
rate = index_of(g);
Usz max = index_of(PEEK(0, 1));
Usz val = index_of(PEEK(1, 0));
if (max == 0)
max = 36;
val = val + rate;
val = val % max;
POKE(1, 0, glyph_of(val));
END_OPERATOR
BEGIN_OPERATOR(jump)
LOWERCASE_REQUIRES_BANG;
PORT(-1, 0, IN);
PORT(1, 0, OUT);
POKE(1, 0, PEEK(-1, 0));
END_OPERATOR
// Note: this is merged from a pull request without being fully tested or
// optimized
BEGIN_OPERATOR(konkat)
LOWERCASE_REQUIRES_BANG;
Isz len = (Isz)index_of(PEEK(0, -1));
if (len == 0)
len = 1;
PORT(0, -1, IN | PARAM);
for (Isz i = 0; i < len; ++i) {
PORT(0, i + 1, IN);
Glyph var = PEEK(0, i + 1);
if (var != '.') {
Usz var_idx = index_of(var);
if (var_idx != 0) {
Glyph result = extra_params->vars_slots[var_idx];
PORT(1, i + 1, OUT);
POKE(1, i + 1, result);
}
}
}
END_OPERATOR
BEGIN_OPERATOR(lesser)
LOWERCASE_REQUIRES_BANG;
PORT(0, -1, IN | PARAM);
PORT(0, 1, IN);
PORT(1, 0, OUT);
Glyph ga = PEEK(0, -1);
Glyph gb = PEEK(0, 1);
if (ga == '.' || gb == '.') {
POKE(1, 0, '.');
} else {
Usz ia = index_of(ga);
Usz ib = index_of(gb);
Usz out = ia < ib ? ia : ib;
POKE(1, 0, glyph_with_case(glyph_of(out), gb));
}
END_OPERATOR
BEGIN_OPERATOR(multiply)
LOWERCASE_REQUIRES_BANG;
PORT(0, -1, IN | PARAM);
PORT(0, 1, IN);
PORT(1, 0, OUT);
Glyph a = PEEK(0, -1);
Glyph b = PEEK(0, 1);
Glyph g = glyph_table[(index_of(a) * index_of(b)) % Glyphs_index_count];
POKE(1, 0, glyph_with_case(g, b));
END_OPERATOR
BEGIN_OPERATOR(offset)
LOWERCASE_REQUIRES_BANG;
Isz in_x = (Isz)index_of(PEEK(0, -2)) + 1;
Isz in_y = (Isz)index_of(PEEK(0, -1));
PORT(0, -1, IN | PARAM);
PORT(0, -2, IN | PARAM);
PORT(in_y, in_x, IN);
PORT(1, 0, OUT);
POKE(1, 0, PEEK(in_y, in_x));
END_OPERATOR
BEGIN_OPERATOR(push)
LOWERCASE_REQUIRES_BANG;
Usz key = index_of(PEEK(0, -2));
Usz len = index_of(PEEK(0, -1));
PORT(0, -1, IN | PARAM);
PORT(0, -2, IN | PARAM);
PORT(0, 1, IN);
if (len == 0)
return;
Isz out_x = (Isz)(key % len);
for (Usz i = 0; i < len; ++i) {
LOCK(1, (Isz)i);
}
PORT(1, out_x, OUT);
POKE(1, out_x, PEEK(0, 1));
END_OPERATOR
BEGIN_OPERATOR(query)
LOWERCASE_REQUIRES_BANG;
Isz in_x = (Isz)index_of(PEEK(0, -3)) + 1;
Isz in_y = (Isz)index_of(PEEK(0, -2));
Isz len = (Isz)index_of(PEEK(0, -1));
Isz out_x = 1 - len;
PORT(0, -3, IN | PARAM); // x
PORT(0, -2, IN | PARAM); // y
PORT(0, -1, IN | PARAM); // len
// todo direct buffer manip
for (Isz i = 0; i < len; ++i) {
PORT(in_y, in_x + i, IN);
PORT(1, out_x + i, OUT);
Glyph g = PEEK(in_y, in_x + i);
POKE(1, out_x + i, g);
}
END_OPERATOR
BEGIN_OPERATOR(random)
LOWERCASE_REQUIRES_BANG;
PORT(0, -1, IN | PARAM);
PORT(0, 1, IN);
PORT(1, 0, OUT);
Usz a = index_of(PEEK(0, -1));
Usz b = index_of(PEEK(0, 1));
if (b == 0)
b = 36;
Usz min, max;
if (a == b) {
POKE(1, 0, glyph_of(a));
return;
} else if (a < b) {
min = a;
max = b;
} else {
min = b;
max = a;
}
// Initial input params for the hash
Usz key = (extra_params->random_seed + y * width + x) ^
(Tick_number << UINT32_C(16));
// 32-bit shift_mult hash to evenly distribute bits
key = (key ^ UINT32_C(61)) ^ (key >> UINT32_C(16));
key = key + (key << UINT32_C(3));
key = key ^ (key >> UINT32_C(4));
key = key * UINT32_C(0x27d4eb2d);
key = key ^ (key >> UINT32_C(15));
// Hash finished. Restrict to desired range of numbers.
Usz val = key % (max - min) + min;
POKE(1, 0, glyph_of(val));
END_OPERATOR
BEGIN_OPERATOR(track)
LOWERCASE_REQUIRES_BANG;
Usz key = index_of(PEEK(0, -2));
Usz len = index_of(PEEK(0, -1));
PORT(0, -2, IN | PARAM);
PORT(0, -1, IN | PARAM);
if (len == 0)
return;
Isz read_val_x = (Isz)(key % len) + 1;
for (Usz i = 0; i < len; ++i) {
LOCK(0, (Isz)(i + 1));
}
PORT(0, (Isz)read_val_x, IN);
PORT(1, 0, OUT);
POKE(1, 0, PEEK(0, read_val_x));
END_OPERATOR
// https://www.computermusicdesign.com/
// simplest-euclidean-rhythm-algorithm-explained/
BEGIN_OPERATOR(uclid)
LOWERCASE_REQUIRES_BANG;
PORT(0, -1, IN | PARAM);
PORT(0, 1, IN);
PORT(1, 0, OUT);
Glyph left = PEEK(0, -1);
Usz steps = 1;
if (left != '.' && left != '*')
steps = index_of(left);
Usz max = index_of(PEEK(0, 1));
if (max == 0)
max = 8;
Usz bucket = (steps * (Tick_number + max - 1)) % max + steps;
Glyph g = (bucket >= max) ? '*' : '.';
POKE(1, 0, g);
END_OPERATOR
BEGIN_OPERATOR(variable)
LOWERCASE_REQUIRES_BANG;
PORT(0, -1, IN | PARAM);
PORT(0, 1, IN | PARAM);
Glyph left = PEEK(0, -1);
Glyph right = PEEK(0, 1);
if (left != '.') {
// Write
Usz var_idx = index_of(left);
extra_params->vars_slots[var_idx] = right;
} else if (right != '.') {
// Read
PORT(1, 0, OUT);
Usz var_idx = index_of(right);
Glyph result = extra_params->vars_slots[var_idx];
POKE(1, 0, result);
}
END_OPERATOR
BEGIN_OPERATOR(teleport)
LOWERCASE_REQUIRES_BANG;
Isz out_x = (Isz)index_of(PEEK(0, -2));
Isz out_y = (Isz)index_of(PEEK(0, -1)) + 1;
PORT(0, -2, IN | PARAM); // x
PORT(0, -1, IN | PARAM); // y
PORT(0, 1, IN);
PORT(out_y, out_x, OUT | NONLOCKING);
POKE_STUNNED(out_y, out_x, PEEK(0, 1));
END_OPERATOR
BEGIN_OPERATOR(yump)
LOWERCASE_REQUIRES_BANG;
PORT(0, -1, IN);
PORT(0, 1, OUT);
POKE(0, 1, PEEK(0, -1));
END_OPERATOR
BEGIN_OPERATOR(lerp)
LOWERCASE_REQUIRES_BANG;
PORT(0, -1, IN | PARAM);
PORT(0, 1, IN);
PORT(1, 0, IN | OUT);
Glyph g = PEEK(0, -1);
Isz rate = g == '.' || g == '*' ? 1 : (Isz)index_of(g);
Isz goal = (Isz)index_of(PEEK(0, 1));
Isz val = (Isz)index_of(PEEK(1, 0));
Isz mod = val <= goal - rate ? rate : val >= goal + rate ? -rate : goal - val;
POKE(1, 0, glyph_of((Usz)(val + mod)));
END_OPERATOR
//////// Run simulation
void orca_run(Glyph *restrict gbuf, Mark *restrict mbuf, Usz height, Usz width,
Usz tick_number, Oevent_list *oevent_list, Usz random_seed) {
Glyph vars_slots[Glyphs_index_count];
memset(vars_slots, '.', sizeof(vars_slots));
Oper_extra_params extras;
extras.vars_slots = &vars_slots[0];
extras.oevent_list = oevent_list;
extras.random_seed = random_seed;
for (Usz iy = 0; iy < height; ++iy) {
Glyph const *glyph_row = gbuf + iy * width;
Mark const *mark_row = mbuf + iy * width;
for (Usz ix = 0; ix < width; ++ix) {
Glyph glyph_char = glyph_row[ix];
if (ORCA_LIKELY(glyph_char == '.'))
continue;
Mark cell_flags = mark_row[ix] & (Mark_flag_lock | Mark_flag_sleep);
if (cell_flags & (Mark_flag_lock | Mark_flag_sleep))
continue;
switch (glyph_char) {
#define UNIQUE_CASE(_oper_char, _oper_name) \
case _oper_char: \
oper_behavior_##_oper_name(gbuf, mbuf, height, width, iy, ix, tick_number, \
&extras, cell_flags, glyph_char); \
break;
#define ALPHA_CASE(_upper_oper_char, _oper_name) \
case _upper_oper_char: \
case (char)(_upper_oper_char | 1 << 5): \
oper_behavior_##_oper_name(gbuf, mbuf, height, width, iy, ix, tick_number, \
&extras, cell_flags, glyph_char); \
break;
UNIQUE_OPERATORS(UNIQUE_CASE)
ALPHA_OPERATORS(ALPHA_CASE)
#undef UNIQUE_CASE
#undef ALPHA_CASE
}
}
}
}