ref: 53b5cb4f63b5725d4a97592abb3ab3316a4bf466
dir: /sim.c/
#include "sim.h"
#include "gbuffer.h"
//////// Utilities
static Glyph const indexed_glyphs[] = {
'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 indexed_glyphs };
// Always returns 0 through (sizeof indexed_glyphs) - 1, and works on
// capitalized glyphs as well. The index of the lower-cased glyph is returned
// if the glyph is capitalized.
#if 1
// Branchless implementation. Assumes two's complement.
static Usz index_of(Glyph c) {
int i = c;
enum {
// All number chars have this bit set. Some alpha chars do.
Num_bit = 1 << 4,
// All alpha chars have this bit set. No number chars do.
Alpha_bit = 1 << 6,
// The bits we use from a number char (0000 1111) to get an index number
Lower_4 = 0xF,
// The bits we use from an alpha char (0001 1111) to get an index number
Lower_5 = 0x1F,
};
union {
uint32_t u;
int32_t i;
} pui;
// Turn the alpha bit into a mask of all 32 bits
pui.u = (uint32_t)(i & Alpha_bit) << UINT32_C(25);
int alpha_mask = pui.i >> 31;
// Turn the number bit into a mask of all 32 bits
pui.u = (uint32_t)(i & Num_bit) << UINT32_C(27);
int num_mask = pui.i >> 31;
// If it's an alpha char, we add 9 to it, bringing 'a'/'A' from 1 to 10, 'b'
// to 11, etc.
return (Usz)((i & ((alpha_mask & Lower_5) | (num_mask & Lower_4))) +
(9 & alpha_mask));
// If the glyph might be a non-valid char in certain ranges (like '^' char)
// we will return a number here greater than 35. We could do % 36 here if we
// wanted to be really safe.
}
#else
// Reference implementation
static Usz index_of(Glyph c) {
if (c == '.' || c == '*')
return 0;
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;
}
#endif
static Usz safe_index_of(Glyph c) { return index_of(c) % 36; }
static inline Glyph glyph_of(Usz index) {
assert(index < Glyphs_index_count);
return indexed_glyphs[index];
}
static inline bool glyph_is_lowercase(Glyph g) { return g & (1 << 5); }
static inline 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));
}
ORCA_PURE static 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) {
switch (g) {
case 'C':
return 0;
case 'c':
return 1;
case 'D':
return 2;
case 'd':
return 3;
case 'E':
return 4;
case 'F':
return 5;
case 'f':
return 6;
case 'G':
return 7;
case 'g':
return 8;
case 'A':
return 9;
case 'a':
return 10;
case 'B':
return 11;
default:
return UINT8_MAX;
}
}
static ORCA_FORCE_NO_INLINE U8 midi_velocity_of(Glyph g) {
Usz n = index_of(g);
// scale [0,9] to [0,127]
if (n < 10)
return (U8)(n * 14 + 1);
n -= 10;
// scale [0,25] to [0,127]
// js seems to send 1 when original n is < 10, and 0 when n is 11. Is that
// the intended behavior?
if (n == 0)
return UINT8_C(0);
if (n >= 26)
return UINT8_C(127);
return (U8)(n * 5 - 3);
}
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;
}
#define OPER_FUNCTION_ATTRIBS ORCA_FORCE_NO_INLINE 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) \
_('*', bang) \
_(':', midi) \
_(';', udp) \
_('=', osc)
#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)
// TODO unimplemented
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;
Oevent_midi* oe =
(Oevent_midi*)oevent_list_alloc_item(extra_params->oevent_list);
oe->oevent_type = (U8)Oevent_type_midi;
oe->channel = (U8)channel_num;
oe->octave = octave_num;
oe->note = note_num;
oe->velocity = midi_velocity_of(velocity_g);
oe->bar_divisor = (U8)(index_of(length_g) + 1);
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(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 = indexed_glyphs[(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 = safe_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 = indexed_glyphs[(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 = safe_index_of(left);
extra_params->vars_slots[var_idx] = right;
} else if (right != '.') {
// Read
PORT(1, 0, OUT);
Usz var_idx = safe_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 = 1;
if (g != '.' && g != '*')
rate = (Isz)index_of(g);
Isz target = (Isz)index_of(PEEK(0, 1));
Isz val = (Isz)index_of(PEEK(1, 0));
Isz mod = (val <= target - rate)
? rate
: ((val >= target + rate) ? -rate : target - 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
}
}
}
}