diff options
Diffstat (limited to 'tests/test-memchr.c')
| -rw-r--r-- | tests/test-memchr.c | 53 |
1 files changed, 32 insertions, 21 deletions
diff --git a/tests/test-memchr.c b/tests/test-memchr.c index 9111371a..48f9b2ea 100644 --- a/tests/test-memchr.c +++ b/tests/test-memchr.c @@ -1,5 +1,5 @@ /* - * Copyright (C) 2008-2024 Free Software Foundation, Inc. + * Copyright (C) 2008-2025 Free Software Foundation, Inc. * Written by Eric Blake and Bruno Haible * * This program is free software: you can redistribute it and/or modify @@ -27,9 +27,16 @@ SIGNATURE_CHECK (memchr, void *, (void const *, int, size_t)); #include "zerosize-ptr.h" #include "macros.h" -/* Calculating void * + int is not portable, so this wrapper converts - to char * to make the tests easier to write. */ -#define MEMCHR (char *) memchr +/* Test the library, not the compiler+library. */ +static void * +lib_memchr (void const *s, int c, size_t n) +{ + return memchr (s, c, n); +} +static void *(*volatile volatile_memchr) (void const *, int, size_t) + = lib_memchr; +#undef memchr +#define memchr volatile_memchr int main (void) @@ -46,26 +53,26 @@ main (void) input[n - 1] = 'a'; /* Basic behavior tests. */ - ASSERT (MEMCHR (input, 'a', n) == input); + ASSERT (memchr (input, 'a', n) == input); - ASSERT (MEMCHR (input, 'a', 0) == NULL); + ASSERT (memchr (input, 'a', 0) == NULL); { void *page_boundary = zerosize_ptr (); if (page_boundary) - ASSERT (MEMCHR (page_boundary, 'a', 0) == NULL); + ASSERT (memchr (page_boundary, 'a', 0) == NULL); } - ASSERT (MEMCHR (input, 'b', n) == input + 1); - ASSERT (MEMCHR (input, 'c', n) == input + 2); - ASSERT (MEMCHR (input, 'd', n) == input + 1026); + ASSERT (memchr (input, 'b', n) == input + 1); + ASSERT (memchr (input, 'c', n) == input + 2); + ASSERT (memchr (input, 'd', n) == input + 1026); - ASSERT (MEMCHR (input + 1, 'a', n - 1) == input + n - 1); - ASSERT (MEMCHR (input + 1, 'e', n - 1) == input + n - 2); - ASSERT (MEMCHR (input + 1, 0x789abc00 | 'e', n - 1) == input + n - 2); + ASSERT (memchr (input + 1, 'a', n - 1) == input + n - 1); + ASSERT (memchr (input + 1, 'e', n - 1) == input + n - 2); + ASSERT (memchr (input + 1, 0x789abc00 | 'e', n - 1) == input + n - 2); - ASSERT (MEMCHR (input, 'f', n) == NULL); - ASSERT (MEMCHR (input, '\0', n) == NULL); + ASSERT (memchr (input, 'f', n) == NULL); + ASSERT (memchr (input, '\0', n) == NULL); /* Check that a very long haystack is handled quickly if the byte is found near the beginning. */ @@ -73,7 +80,7 @@ main (void) size_t repeat = 10000; for (; repeat > 0; repeat--) { - ASSERT (MEMCHR (input, 'c', n) == input + 2); + ASSERT (memchr (input, 'c', n) == input + 2); } } @@ -86,7 +93,7 @@ main (void) input[i + j] = j; for (j = 0; j < 256; j++) { - ASSERT (MEMCHR (input + i, j, 256) == input + i + j); + ASSERT (memchr (input + i, j, 256) == input + i + j); } } } @@ -109,8 +116,8 @@ main (void) { char *mem = page_boundary - n; memset (mem, 'X', n); - ASSERT (MEMCHR (mem, 'U', n) == NULL); - ASSERT (MEMCHR (mem, 0, n) == NULL); + ASSERT (memchr (mem, 'U', n) == NULL); + ASSERT (memchr (mem, 0, n) == NULL); { size_t i; @@ -120,10 +127,10 @@ main (void) { mem[i] = 'U'; for (k = i + 1; k < n + limit; k++) - ASSERT (MEMCHR (mem, 'U', k) == mem + i); + ASSERT (memchr (mem, 'U', k) == mem + i); mem[i] = 0; for (k = i + 1; k < n + limit; k++) - ASSERT (MEMCHR (mem, 0, k) == mem + i); + ASSERT (memchr (mem, 0, k) == mem + i); mem[i] = 'X'; } } @@ -133,5 +140,9 @@ main (void) free (input); + /* Test zero-length operations on NULL pointers, allowed by + <https://www.open-std.org/jtc1/sc22/wg14/www/docs/n3322.pdf>. */ + ASSERT (memchr (NULL, '?', 0) == NULL); + return test_exit_status; } |