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

   1 /*
   2  * strncmp 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 #include <stdint.h>
  10 #include <stdio.h>
  11 #include <stdlib.h>
  12 #include <string.h>
  13 #include "stringlib.h"
  14
  15 static const struct fun
  16 {
  17         const char *name;
  18         int (*fun)(const char *, const char *, size_t);
  19 } funtab[] = {
  20 #define F(x) {#x, x},
  21 F(strncmp)
  22 #if __aarch64__
  23 F(__strncmp_aarch64)
  24 # if __ARM_FEATURE_SVE
  25 F(__strncmp_aarch64_sve)
  26 # endif
  27 #endif
  28 #undef F
  29         {0, 0}
  30 };
  31
  32 static int test_status;
  33 #define ERR(...) (test_status=1, printf(__VA_ARGS__))
  34
  35 #define A 32
  36 #define LEN 250000
  37 static char s1buf[LEN+2*A];
  38 static char s2buf[LEN+2*A];
  39
  40 static void *alignup(void *p)
  41 {
  42         return (void*)(((uintptr_t)p + A-1) & -A);
  43 }
  44
  45 static void test(const struct fun *fun, int s1align, int s2align, int maxlen, int diffpos, int len)
  46 {
  47         char *src1 = alignup(s1buf);
  48         char *src2 = alignup(s2buf);
  49         char *s1 = src1 + s1align;
  50         char *s2 = src2 + s2align;
  51         int r;
  52
  53         if (len > LEN || s1align >= A || s2align >= A)
  54                 abort();
  55         if (diffpos > 1 && diffpos >= len-1)
  56                 abort();
  57
  58         for (int i = 0; i < len+A; i++)
  59                 src1[i] = src2[i] = '?';
  60         for (int i = 0; i < len-1; i++)
  61                 s1[i] = s2[i] = 'a' + i%23;
  62         if (diffpos > 1)
  63                 s1[diffpos]++;
  64         s1[len] = s2[len] = '\0';
  65
  66         r = fun->fun(s1, s2, maxlen);
  67
  68         diffpos = maxlen <= diffpos ? 0 : diffpos;
  69
  70         if (((diffpos <= 1) && r != 0) || (diffpos > 1 && r == 0)) {
  71                 ERR("%s(align %d, align %d, %d (%d)) failed, returned %d (%d)\n",
  72                         fun->name, s1align, s2align, maxlen, len, r, diffpos);
  73                 ERR("src1: %.*s\n", s1align+len+1, src1);
  74                 ERR("src2: %.*s\n", s2align+len+1, src2);
  75         }
  76 }
  77
  78 int main()
  79 {
  80         int r = 0;
  81         for (int i=0; funtab[i].name; i++) {
  82                 test_status = 0;
  83                 for (int d = 0; d < A; d++)
  84                         for (int s = 0; s < A; s++) {
  85                                 int n;
  86                                 for (n = 0; n < 100; n++) {
  87                                         test(funtab+i, d, s, n,   0,   n);
  88                                         test(funtab+i, d, s, n,   n/2, n);
  89                                         test(funtab+i, d, s, n/2, 0,   n);
  90                                         test(funtab+i, d, s, n/2, n/2, n);
  91                                 }
  92                                 for (; n < LEN; n *= 2) {
  93                                         test(funtab+i, d, s, n,   0,   n);
  94                                         test(funtab+i, d, s, n,   n/2, n);
  95                                         test(funtab+i, d, s, n/2, 0,   n);
  96                                         test(funtab+i, d, s, n/2, n/2, n);
  97                                 }
  98                         }
  99                 printf("%s %s\n", test_status ? "FAIL" : "PASS", funtab[i].name);
 100                 if (test_status)
 101                         r = -1;
 102         }
 103         return r;
 104 }