libc/AOR_v20.02/string/test/strnlen.c

   1 /*
   2  * strnlen test.
   3  *
   4  * Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   5  * See https://llvm.org/LICENSE.txt for license information.
   6  * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   7  */
   8
   9 #define _POSIX_C_SOURCE 200809L
  10
  11 #include <stdint.h>
  12 #include <stdio.h>
  13 #include <stdlib.h>
  14 #include <string.h>
  15 #include <limits.h>
  16 #include "stringlib.h"
  17
  18 static const struct fun
  19 {
  20         const char *name;
  21         size_t (*fun)(const char *s, size_t m);
  22 } funtab[] = {
  23 #define F(x) {#x, x},
  24 F(strnlen)
  25 #if __aarch64__
  26 F(__strnlen_aarch64)
  27 # if __ARM_FEATURE_SVE
  28 F(__strnlen_aarch64_sve)
  29 # endif
  30 #endif
  31 #undef F
  32         {0, 0}
  33 };
  34
  35 static int test_status;
  36 #define ERR(...) (test_status=1, printf(__VA_ARGS__))
  37
  38 #define A 32
  39 #define SP 512
  40 #define LEN 250000
  41 static char sbuf[LEN+2*A];
  42
  43 static void *alignup(void *p)
  44 {
  45         return (void*)(((uintptr_t)p + A-1) & -A);
  46 }
  47
  48 static void test(const struct fun *fun, int align, int maxlen, int len)
  49 {
  50         char *src = alignup(sbuf);
  51         char *s = src + align;
  52         size_t r;
  53         size_t e = maxlen < len ? maxlen : len - 1;
  54
  55         if (len > LEN || align >= A)
  56                 abort();
  57
  58         for (int i = 0; i < len + A; i++)
  59                 src[i] = '?';
  60         for (int i = 0; i < len - 2; i++)
  61                 s[i] = 'a' + i%23;
  62         s[len - 1] = '\0';
  63
  64         r = fun->fun(s, maxlen);
  65         if (r != e) {
  66                 ERR("%s(%p) returned %zu\n", fun->name, s, r);
  67                 ERR("input:    %.*s\n", align+len+1, src);
  68                 ERR("expected: %d\n", len);
  69                 abort();
  70         }
  71 }
  72
  73 int main()
  74 {
  75         int r = 0;
  76         for (int i=0; funtab[i].name; i++) {
  77                 test_status = 0;
  78                 for (int a = 0; a < A; a++) {
  79                         int n;
  80                         for (n = 1; n < 100; n++)
  81                                 for (int maxlen = 0; maxlen < 100; maxlen++)
  82                                         test(funtab+i, a, maxlen, n);
  83                         for (; n < LEN; n *= 2) {
  84                                 test(funtab+i, a, n*2, n);
  85                                 test(funtab+i, a, n, n);
  86                                 test(funtab+i, a, n/2, n);
  87                         }
  88                 }
  89                 printf("%s %s\n", test_status ? "FAIL" : "PASS", funtab[i].name);
  90                 if (test_status)
  91                         r = -1;
  92         }
  93         return r;
  94 }