/* C functions that return strings, for programs/cstr-return.flan. Each one is
 * a way a real library hands text back, and each has a failure the copy at
 * the boundary has to survive. */

#include <stddef.h>
#include <stdio.h>
#include <string.h>

/* The library's static buffer, overwritten by the next call: TextFormat and
 * GetGamepadName's shape. */
const char *cret_count(int n) {
  static char buf[32];
  snprintf(buf, sizeof buf, "count %d", n);
  return buf;
}

/* A pointer into the argument: GetFileName's shape. The argument is the
 * wrapper's own NUL-terminated copy, which is gone once the wrapper returns. */
const char *cret_after_slash(const char *path) {
  const char *s = strrchr(path, '/');
  return s == NULL ? path : s + 1;
}

/* No text at all. */
const char *cret_nothing(void) { return NULL; }