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day10

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This commit is contained in:
Zack Buhman 2024-12-10 00:27:23 -06:00
parent c7febb0b23
commit 9271e4c3e5
15 changed files with 284 additions and 19 deletions
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1
aoc.mk
View File

@ -11,6 +11,7 @@ OBJ = \
DREAMCAST_OBJ = \
runner_dreamcast.o \
input_dreamcast.o \
sh7091_scif.o \
$(LIB)/holly/core.o \
$(LIB)/holly/region_array.o \
$(LIB)/holly/background.o \

54
day10/input.txt Normal file
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@ -0,0 +1,54 @@
034565433432321821235456556798712438943432345432101010
125674344341210930012367349897601123876501656543238923
545981265210523841112398232098532014101665437654147014
436780378019654756501454101123442125012878328956056985
521091489328765661498760130210356916763969012347841076
342698456410644570187321221202197809854054521078932987
434784387569653089298435430143087612870123654169410673
525601295678762120387589347834561543965434783254321034
510567856789854871456678956921670123457650199165890321
654356943889903962345665067830589894398743278056785410
701245012958712653434784167845678765210634565410156789
898434321867012344321093254976104543231023876321943089
686321780154102101287765323987267650122012989423872176
567980691233283237898894015416398532143606788714565765
408974500543098946907623234505458545014545698601159854
312363217632127655416510107612369876105894332589018345
221457898565634562323421458733478983276701201478121230
100656967874567641032102369021098744589856782363210121
789345450923498634543001078112321654678345891054308701
654212321012654521694210981205430903543232654143489610
503403430156787610784300870376567812654121743267876523
012567567343898525695421889487854925780010893210965432
123498788210123436786438976598943056891234984921014101
019567699101898345877567887678762147878765675870123012
108754543210567212968900194589054038969454566767636323
205610121056750303453213293032123229454323879098545438
014981232347841219874984782143210110301012978121654569
123672654338932306705675676154560121212307665430743478
298543789221069455012310145069430430925408578989832387
567010176109178764563498232178521567876519454567601296
432123485458769853074567310123678106898323343218970345
012034394367458102189601489433439256765401252102181234
123465210210343012078732676512508349850106769843098321
054896990101212043896543216109612556743219856784587410
969887889654302158987894107898743445654340145697656531
878791078745983467856765545677654354567854234548545621
745622363215676500345653231987980123498960129639343210
034215454301876211256570120345678154323870038721658343
122100189321945308967981011234569067212721801290569012
543893276430932457898876323233432178008934980387378143
456764345567801966501895400145567889127645673456269654
369632105478765873432689312176876901234560012562158765
278543254309894569546576543089985432321071239873043210
103450569212723278637434010034394321810980548954560127
894321078112010198728922121165223010901289687643073438
765697151003434587017213033278112987874398796542189569
056788769876524326501304544569001056965834321233675678
145679458985015415432987693432102345216945610344569547
230989347034376102341056780540989104307898700123678632
321078234123289211652346791691071234487465410878766781
989165106000105690789905882782360943296578321969215690
076234245612234782349814943485456850123489100154304385
145210238763145671456723876596306765012101256701235276
234300149854078980365432101487217898721032349810120123

15
day10/input.txt.h Normal file
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@ -0,0 +1,15 @@
#pragma once
#include <stdint.h>
#ifdef __cplusplus
extern "C" {
#endif
extern uint32_t _binary_day10_input_txt_start __asm("_binary_day10_input_txt_start");
extern uint32_t _binary_day10_input_txt_end __asm("_binary_day10_input_txt_end");
extern uint32_t _binary_day10_input_txt_size __asm("_binary_day10_input_txt_size");
#ifdef __cplusplus
}
#endif

8
day10/sample1.txt Normal file
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@ -0,0 +1,8 @@
89010123
78121874
87430965
96549874
45678903
32019012
01329801
10456732

15
day10/sample1.txt.h Normal file
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@ -0,0 +1,15 @@
#pragma once
#include <stdint.h>
#ifdef __cplusplus
extern "C" {
#endif
extern uint32_t _binary_day10_sample1_txt_start __asm("_binary_day10_sample1_txt_start");
extern uint32_t _binary_day10_sample1_txt_end __asm("_binary_day10_sample1_txt_end");
extern uint32_t _binary_day10_sample1_txt_size __asm("_binary_day10_sample1_txt_size");
#ifdef __cplusplus
}
#endif

110
day10/solution.c Normal file
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@ -0,0 +1,110 @@
#include <stdint.h>
#include "parse.h"
#include "cartesian.h"
#include "printf.h"
#include "memory.h"
#include "array.h"
struct offset {
int x;
int y;
};
int walk_trailhead(const char * input,
int depth,
int stride,
int width, int height,
int x, int y,
char * reachable)
{
if (depth == 9) {
reachable[y * width + x] = 1;
return 1;
}
const static struct offset offset[] = {
{ 1, 0},
{-1, 0},
{ 0, 1},
{ 0, -1},
};
int rating = 0;
for (int i = 0; i < (sizeof (offset)) / (sizeof (offset[0])); i++) {
int new_x = x + offset[i].x;
int new_y = y + offset[i].y;
if (cartesian_inside(width, height, new_x, new_y)) {
char c = input[new_y * stride + new_x];
int new_depth = parse_base10_digit(c);
if (new_depth == depth + 1) {
rating += walk_trailhead(input,
new_depth,
stride,
width, height,
new_x, new_y,
reachable);
}
}
}
return rating;
}
struct rating_score {
int rating;
int score;
};
struct rating_score find_trailheads(const char * input, int length,
int stride,
int width, int height
)
{
int x = 0;
int y = 0;
char reachable[width * height];
int total_score = 0;
int total_rating = 0;
for (int i = 0; i < length; i++) {
if (input[i] == '0') {
memory_set_char(reachable, 0, width * height);
int rating = walk_trailhead(input, 0, stride, width, height, x, y, reachable);
total_rating += rating;
int score = array_sum_char(reachable, width * height);
total_score += score;
}
if (input[i] == '\n') {
x = 0;
y += 1;
} else {
x += 1;
}
}
return (struct rating_score){total_rating, total_score};
}
int64_t day10_part1(const char * input, int length)
{
int stride = parse_stride(input, length);
int height = parse_height(input, length);
int width = stride - 1;
struct rating_score rs = find_trailheads(input, length, stride, width, height);
return rs.score;
}
int64_t day10_part2(const char * input, int length)
{
int stride = parse_stride(input, length);
int height = parse_height(input, length);
int width = stride - 1;
struct rating_score rs = find_trailheads(input, length, stride, width, height);
return rs.rating;
}

14
gen.sh
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@ -42,7 +42,7 @@ function gen_start_size ()
}
for i in day* ; do
for i in day? day?? ; do
make ${i}/sample1.txt.h ${i}/input.txt.h
if [ -f ${i}/sample2.txt ]; then
make ${i}/sample2.txt.h
@ -52,7 +52,7 @@ done
truncate -s0 input_dreamcast.inc
for i in day* ; do
for i in day? day?? ; do
echo "#include \"${i}/sample1.txt.h\"" >> input_dreamcast.inc
if [ -f ${i}/sample2.txt ]; then
echo "#include \"${i}/sample2.txt.h\"" >> input_dreamcast.inc
@ -61,7 +61,7 @@ for i in day* ; do
done
echo >> input_dreamcast.inc
echo "static struct start_size sample[][2] = {" >> input_dreamcast.inc
for i in day* ; do
for i in day? day?? ; do
echo " {" >> input_dreamcast.inc
gen_start_size " " "${i}" "sample1"
if [ ! -f ${i}/sample2.txt ]; then
@ -74,7 +74,7 @@ done
echo "};" >> input_dreamcast.inc
echo >> input_dreamcast.inc
echo "static struct start_size input[] = {" >> input_dreamcast.inc
for i in day* ; do
for i in day? day?? ; do
gen_start_size "" "${i}" "input"
done
echo "};" >> input_dreamcast.inc
@ -82,7 +82,7 @@ echo "};" >> input_dreamcast.inc
truncate -s0 solutions.mk
echo -n "DAY_OBJ =" >> solutions.mk
for i in day* ; do
for i in day? day?? ; do
echo " \\" >> solutions.mk
echo " ${i}/sample1.txt.o \\" >> solutions.mk
if [ -f ${i}/sample2.txt ]; then
@ -97,7 +97,7 @@ done
echo >> solutions.mk
truncate -s0 runner.inc
for i in day* ; do
for i in day? day?? ; do
echo "int64_t ${i}_part1(const char * input, int length);" >> runner.inc
echo "int64_t ${i}_part2(const char * input, int length);" >> runner.inc
if [ -f ${i}/render.cpp ]; then
@ -108,7 +108,7 @@ for i in day* ; do
done
echo >> runner.inc
echo "struct day_funcs solution[] = {" >> runner.inc
for i in day* ; do
for i in day? day?? ; do
echo " {" >> runner.inc
echo " {${i}_part1, ${i}_part2}," >> runner.inc
if [ -f ${i}/render.cpp ]; then

10
input_dreamcast.inc
View File

@ -17,6 +17,8 @@
#include "day8/input.txt.h"
#include "day9/sample1.txt.h"
#include "day9/input.txt.h"
#include "day10/sample1.txt.h"
#include "day10/input.txt.h"
static struct start_size sample[][2] = {
{
@ -73,6 +75,12 @@ static struct start_size sample[][2] = {
{ ( char *)&_binary_day9_sample1_txt_start,
(uint32_t)&_binary_day9_sample1_txt_size },
},
{
{ ( char *)&_binary_day10_sample1_txt_start,
(uint32_t)&_binary_day10_sample1_txt_size },
{ ( char *)&_binary_day10_sample1_txt_start,
(uint32_t)&_binary_day10_sample1_txt_size },
},
};
static struct start_size input[] = {
@ -94,4 +102,6 @@ static struct start_size input[] = {
(uint32_t)&_binary_day8_input_txt_size },
{ ( char *)&_binary_day9_input_txt_start,
(uint32_t)&_binary_day9_input_txt_size },
{ ( char *)&_binary_day10_input_txt_start,
(uint32_t)&_binary_day10_input_txt_size },
};

29
printf.c
View File

@ -5,6 +5,7 @@
#include "parse.h"
#include "unparse.h"
#include "printf.h"
#include "sh7091_scif.h"
enum format_type {
FORMAT_BASE10,
@ -62,6 +63,19 @@ static const char * parse_escape(const char * format, struct format * ft)
struct output_buffer global_output_buffer = {0};
void print_char(char c)
{
global_output_buffer.buf[global_output_buffer.buf_ix++] = c;
scif_character(c);
}
static void __print_s(const char * s, int length)
{
for (int i = 0; i < length; i++) {
scif_character(s[i]);
}
}
void _printf(const char * format, ...)
{
va_list args;
@ -82,6 +96,7 @@ void _printf(const char * format, ...)
int32_t num = va_arg(args, int32_t);
char * s = &global_output_buffer.buf[global_output_buffer.buf_ix];
int offset = unparse_base10(s, num, ft.pad_length, ft.fill_char);
__print_s(s, offset);
global_output_buffer.buf_ix += offset;
}
break;
@ -90,6 +105,7 @@ void _printf(const char * format, ...)
int64_t num = va_arg(args, int64_t);
char * s = &global_output_buffer.buf[global_output_buffer.buf_ix];
int offset = unparse_base10_64(s, num, ft.pad_length, ft.fill_char);
__print_s(s, offset);
global_output_buffer.buf_ix += offset;
}
break;
@ -98,6 +114,7 @@ void _printf(const char * format, ...)
uint32_t num = va_arg(args, uint32_t);
char * s = &global_output_buffer.buf[global_output_buffer.buf_ix];
int offset = unparse_base16(s, num, ft.pad_length, ft.fill_char);
__print_s(s, offset);
global_output_buffer.buf_ix += offset;
}
break;
@ -105,24 +122,32 @@ void _printf(const char * format, ...)
{
const char * s = va_arg(args, const char *);
while (*s != 0) {
global_output_buffer.buf[global_output_buffer.buf_ix++] = *s++;
char c = *s++;
scif_character(c);
global_output_buffer.buf[global_output_buffer.buf_ix++] = c;
}
}
break;
case FORMAT_CHAR:
{
const int c = va_arg(args, const int);
scif_character((char)c);
global_output_buffer.buf[global_output_buffer.buf_ix++] = (char)c;
}
break;
case FORMAT_PERCENT:
scif_character('%');
global_output_buffer.buf[global_output_buffer.buf_ix++] = '%';
break;
}
}
break;
default:
global_output_buffer.buf[global_output_buffer.buf_ix++] = *format++;
{
char c = *format++;
scif_character(c);
global_output_buffer.buf[global_output_buffer.buf_ix++] = c;
}
break;
}
}

2
runner.c
View File

@ -32,7 +32,7 @@ bool runner_tick(struct runner_state * runner_state)
int part = tick % 2;
int day = tick / 2;
if (day < 8)
if (day < 9)
return true;
runner_state->want_render = solution[day].render != NULL;

6
runner.inc
View File

@ -19,6 +19,8 @@ int64_t day8_part1(const char * input, int length);
int64_t day8_part2(const char * input, int length);
int64_t day9_part1(const char * input, int length);
int64_t day9_part2(const char * input, int length);
int64_t day10_part1(const char * input, int length);
int64_t day10_part2(const char * input, int length);
struct day_funcs solution[] = {
{
@ -57,4 +59,8 @@ struct day_funcs solution[] = {
{day9_part1, day9_part2},
NULL,
},
{
{day10_part1, day10_part2},
NULL,
},
};

8
runner_dreamcast.cpp
View File

@ -454,11 +454,3 @@ int main()
serial::string("return\n");
serial::string("return\n");
}
extern "C"
void print_char(char c)
{
global_output_buffer.buf[global_output_buffer.buf_ix++] = c;
serial::character(c);
}

15
sh7091_scif.cpp Normal file
View File

@ -0,0 +1,15 @@
#include "sh7091/sh7091.hpp"
#include "sh7091/sh7091_bits.hpp"
#include "sh7091_scif.h"
void scif_character(const char c)
{
using namespace scif;
// wait for transmit fifo to become partially empty
while ((sh7091.SCIF.SCFSR2 & scfsr2::tdfe::bit_mask) == 0);
sh7091.SCIF.SCFSR2 &= ~scfsr2::tdfe::bit_mask;
sh7091.SCIF.SCFTDR2 = static_cast<uint8_t>(c);
}

11
sh7091_scif.h Normal file
View File

@ -0,0 +1,11 @@
#pragma once
#ifdef __cplusplus
extern "C" {
#endif
void scif_character(const char c);
#ifdef __cplusplus
}
#endif

5
solutions.mk
View File

@ -27,4 +27,7 @@ DAY_OBJ = \
day8/solution.o \
day9/sample1.txt.o \
day9/input.txt.o \
day9/solution.o
day9/solution.o \
day10/sample1.txt.o \
day10/input.txt.o \
day10/solution.o