advent2025

commit cedb45a57fb1989768dcd09cf7f142628860e911
parent 25c5cdae5e6851c0473fc24f59ba668686d52e53
Author: bsandro <email@bsandro.tech>
Date:   Wed, 10 Dec 2025 08:53:26 +0200

day10 parsing

Diffstat:
A
day10.c
 | 
71
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

1 file changed, 71 insertions(+), 0 deletions(-)
diff --git a/day10.c b/day10.c
@@ -0,0 +1,71 @@
+#include <stdio.h>
+#include <stdbool.h>
+
+#define BUF_SIZE 256
+
+typedef struct {
+    int toggles_l;
+    int toggles[16];
+} Button;
+
+typedef struct {
+    int lights_l;
+    bool lights[16];
+    int buttons_l;
+    Button buttons[16];
+} Machine;
+
+void m_add_lights(Machine *m, int buf_l, char buf[buf_l]) {
+    for (int i=0;i<buf_l;++i) {
+        m->lights[m->lights_l++] = buf[i]=='#';
+    }
+}
+
+void m_add_button(Machine *m, int buf_l, char buf[buf_l]) {
+    Button *btn = &m->buttons[m->buttons_l++];
+    for (int i=0;i<buf_l;++i) {
+        btn->toggles[btn->toggles_l++] = buf[i]-'0';
+    }
+}
+
+void m_print(Machine *m, bool btns) {
+    puts("---- Machine ----");
+    printf("Lights:  [");
+    for (int i=0;i<m->lights_l;++i) printf("%c", m->lights[i]?'#':'.');
+    printf("]\n");
+    if (!btns) return;
+    printf("Buttons: ");
+    for (int i=0;i<m->buttons_l;++i) {
+        printf("(");
+        Button *btn = &m->buttons[i];
+        for (int j=0;j<btn->toggles_l;++j) printf("%d", btn->toggles[j]);
+        printf(") ");
+    }
+    printf("\n");
+}
+
+int main(void) {
+    Machine machines[180] = {0};
+    int machines_l = 0;
+    char buf[BUF_SIZE] = {0};
+    int buf_l = 0;
+    for (int c=getchar();c!=EOF;c=getchar()) {
+        if (c==']') {
+            m_add_lights(&machines[machines_l], buf_l, buf);
+            buf_l = 0;
+        }
+        else if (c==')') {
+            m_add_button(&machines[machines_l], buf_l, buf);
+            buf_l = 0;
+        }
+        else if ((c>='0'&&c<='9')||c=='.'||c=='#') buf[buf_l++] = c;
+        else if (c=='\n') {
+            machines_l++;
+            buf_l = 0;
+        }
+    }
+    for (int i=0;i<machines_l;++i) {
+        m_print(&machines[i], false);
+    }
+    return 0;
+}