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Comment:201506 2nd star
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SHA3-256: 9aa8be0d39cce2effd6049625fb5cda3810ba0929345d3da51532545e75b7c4f
User & Date: nnz on 2024-12-15 16:42:00
Other Links: manifest | tags
Context
2024-12-25
15:31
202422 1st star check-in: 8769d8509e user: nnz tags: trunk
2024-12-15
16:42
201506 2nd star check-in: 9aa8be0d39 user: nnz tags: trunk
15:51
201506 1st star check-in: e9f61cfc4a user: nnz tags: trunk
Changes
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Modified aoc2015.c from [3e3bef2904] to [c2e39c674a]. 

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#include <ctype.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "aocdailies.h"
#include "aocutils.h"






static void gridchange(bool *grid, int v,
                       unsigned r1, unsigned c1, unsigned r2, unsigned c2) {
    unsigned firstrow = (r1 < r2) ? r1 : r2;
    unsigned lastrow = (r1 < r2) ? r2 : r1;
    unsigned firstcol = (c1 < c2) ? c1 : c2;
    unsigned lastcol = (c1 < c2) ? c2 : c1;
    for (unsigned row = firstrow; row <= lastrow; row++) {
        for (unsigned col = firstcol; col <= lastcol; col++) {
            grid[1000*row + col] = (v < 0) ? !grid[1000*row + col] : !!v;














        }
    }
}

void aoc201506(char *data, size_t len) {
    (void)len; // unused argument
    bool *grid_ptr = calloc(1000 * 1000, 1);
    char *line = strtok(data, "\n");
    while (line) {
        unsigned x1, x2, y1, y2;
        char *err = line;
        while (!isdigit((unsigned char)*err)) err++;
        y1 = strtoul(err, &err, 10); err++;
        x1 = strtoul(err, &err, 10); while (!isdigit((unsigned char)*err)) err++;
        y2 = strtoul(err, &err, 10); err++;
        x2 = strtoul(err, &err, 10);
        if (line[6] == 'n') gridchange(grid_ptr, 1, y1, x1, y2, x2);
        if (line[6] == 'f') gridchange(grid_ptr, 0, y1, x1, y2, x2);
        if (line[6] == ' ') gridchange(grid_ptr, -1, y1, x1, y2, x2);
        line = strtok(NULL, "\n");
    }
    unsigned lit = 0;
    for (unsigned row = 0; row < 1000; row++) {
        for (unsigned col = 0; col < 1000; col++) {
            lit += grid_ptr[1000*row + col];

        }
    }
    free(grid_ptr);
    printf("After following the instructions, there are %u lights lit.\n", lit);

}

void aoc201505(char *data, size_t len) {
    (void)len; // unused argument
    unsigned nice = 0, nice2 = 0;
    char *line = strtok(data, "\n"), *curr;
    while (line) {









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#include <ctype.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "aocdailies.h"
#include "aocutils.h"

struct LampGrid {
    unsigned lit:1;
    unsigned bright:31;
};

static void gridchange(struct LampGrid *grid, int v,
                       unsigned r1, unsigned c1, unsigned r2, unsigned c2) {
    unsigned firstrow = (r1 < r2) ? r1 : r2;
    unsigned lastrow = (r1 < r2) ? r2 : r1;
    unsigned firstcol = (c1 < c2) ? c1 : c2;
    unsigned lastcol = (c1 < c2) ? c2 : c1;
    for (unsigned row = firstrow; row <= lastrow; row++) {
        for (unsigned col = firstcol; col <= lastcol; col++) {
            size_t index = 1000*row + col;
            switch (v) {
                default: fprintf(stderr, "bad value detected\n");
                         exit(EXIT_FAILURE);
                         //  break; // never reached
                case -1: grid[index].lit = 0;
                         if (grid[index].bright > 0) grid[index].bright -= 1;
                         break;
                case 1: grid[index].lit = 1;
                        grid[index].bright += 1;
                        break;
                case 2: grid[index].lit = 1 - grid[index].lit;
                        grid[index].bright += 2;
                        break;
            }
        }
    }
}

void aoc201506(char *data, size_t len) {
    (void)len; // unused argument
    struct LampGrid *grid_ptr = calloc(1000 * 1000, sizeof *grid_ptr);
    char *line = strtok(data, "\n");
    while (line) {
        unsigned x1, x2, y1, y2;
        char *err = line;
        while (!isdigit((unsigned char)*err)) err++;
        y1 = strtoul(err, &err, 10); err++;
        x1 = strtoul(err, &err, 10); while (!isdigit((unsigned char)*err)) err++;
        y2 = strtoul(err, &err, 10); err++;
        x2 = strtoul(err, &err, 10);
        if (line[6] == 'n') gridchange(grid_ptr, 1, y1, x1, y2, x2);
        if (line[6] == 'f') gridchange(grid_ptr, -1, y1, x1, y2, x2);
        if (line[6] == ' ') gridchange(grid_ptr, 2, y1, x1, y2, x2);
        line = strtok(NULL, "\n");
    }
    unsigned lit = 0, brightness = 0;
    for (unsigned row = 0; row < 1000; row++) {
        for (unsigned col = 0; col < 1000; col++) {
            lit += grid_ptr[1000*row + col].lit;
            brightness += grid_ptr[1000*row + col].bright;
        }
    }
    free(grid_ptr);
    printf("After following the instructions, there are %u lights lit.\n", lit);
    printf("Total brightness is {%u}.\n", brightness);
}

void aoc201505(char *data, size_t len) {
    (void)len; // unused argument
    unsigned nice = 0, nice2 = 0;
    char *line = strtok(data, "\n"), *curr;
    while (line) {
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