1/*
2 * Common string test code.
3 *
4 * Copyright (c) 2020, Arm Limited.
5 * SPDX-License-Identifier: MIT OR Apache-2.0 WITH LLVM-exception
6 */
7
8#include <ctype.h>
9#include <stdio.h>
10
11/* Accounting errors for a test case.  */
12static int err_count;
13#define ERR_LIMIT 10
14#define ERR(...) (err_count++, printf (__VA_ARGS__))
15
16static inline void
17quotechar (unsigned char c)
18{
19  if (isprint (c))
20    putchar (c);
21  else
22    printf ("\\x%02x", c);
23}
24
25/* quoted print around at or the entire string if at < 0.  */
26static void
27quoteat (const char *prefix, const void *p, int len, int at)
28{
29  static const int CTXLEN = 15;
30  int i;
31  const char *pre = "\"";
32  const char *post = "\"";
33  const char *s = p;
34  if (at > CTXLEN)
35    {
36      s += at - CTXLEN;
37      len -= at - CTXLEN;
38      pre = "...\"";
39    }
40  if (at >= 0 && len > 2 * CTXLEN + 1)
41    {
42      len = 2 * CTXLEN + 1;
43      post = "\"...";
44    }
45  printf ("%4s: %s", prefix, pre);
46  for (i = 0; i < len; i++)
47    quotechar (s[i]);
48  printf ("%s\n", post);
49}
50
51static inline void
52quote (const char *prefix, const void *p, int len)
53{
54  quoteat (prefix, p, len, -1);
55}
56