kirill-refactor

mine/lab_2/vlad/lib_d.c

@@ -0,0 +1,35 @@
+#include <stddef.h>
+
+int replace_char(char *buf, int key, int *replacements_left) {
+    (void)key;
+    int replaced = 0;
+    size_t i = 0;
+
+    while (buf[i] != '\0') {
+        if (buf[i] == '\n') {
+            i++;
+            continue;
+        }
+
+        // Detect start of a symbol run
+        char symbol = buf[i];
+        size_t run_start = i;
+        size_t run_len = 1;
+
+        // Count length of run
+        while (buf[i + run_len] == symbol && buf[i + run_len] != '\n' && buf[i + run_len] != '\0') {
+            run_len++;
+        }
+
+        // For pairs and longer runs: replace every 2nd, 4th, ...
+        for (size_t j = 1; j < run_len && *replacements_left > 0; j += 2) {
+            buf[run_start + j] = ' ';
+            replaced++;
+            (*replacements_left)--;
+            if (*replacements_left == 0) break;
+        }
+
+        i += run_len;
+    }
+    return replaced;
+}