wip

input.c

@@ -0,0 +1,70 @@
+/*  input.c
+ *
+ *  Various input routines
+ *
+ *  written by vx-clutch
+ */
+
+#include <ctype.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "input.h"
+
+char *getstring(char *fmt, ...) {
+  va_list args;
+  va_start(args, fmt);
+
+  printf("? ");
+  vprintf(fmt, args);
+  putc(' ', stdout);
+
+  va_end(args);
+  fflush(stdout);
+
+  char *buf = NULL;
+  size_t size = 0;
+  ssize_t len = getline(&buf, &size, stdin);
+
+  if (len < 0) {
+    free(buf);
+    return NULL;
+  }
+
+  if (len > 0 && buf[len - 1] == '\n')
+    buf[len - 1] = '\0';
+
+  return buf;
+}
+
+int yes_no_prompt(const char *fmt, ...) {
+  char prompt[256];
+
+  va_list ap;
+  va_start(ap, fmt);
+  vsnprintf(prompt, sizeof prompt, fmt, ap);
+  va_end(ap);
+
+  char buf[64];
+  for (;;) {
+    fprintf(stderr, "? %s", prompt);
+    fputs(" (y/n) ", stdout);
+    fflush(stdout);
+
+    if (!fgets(buf, sizeof buf, stdin))
+      return 0;
+
+    size_t i = 0;
+    while (buf[i] && isspace((unsigned char)buf[i]))
+      i++;
+    if (!buf[i])
+      continue;
+
+    char c = tolower((unsigned char)buf[i]);
+    if (c == 'y')
+      return 1;
+    if (c == 'n')
+      return 0;
+  }
+}