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comparison lib/xmemdup0.c @ 40214:452ab00796c7

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Fix undefined behaviour. * lib/bitrotate.h (rotl16, rotr16, rotl8, rotr8): Case x to 'unsigned int', to avoid shift operations on 'int'. * lib/xmemdup0.c (xmemdup0): Don't invoke memcpy with a zero size. * tests/test-count-leading-zeros.c (main): Use a random number that has as many bits as TYPE, not only 2*15 or 2*31 bits. * tests/test-count-trailing-zeros.c (main): Likewise. * tests/test-count-one-bits.c (main): Likewise. * tests/test-memmem.c: Don't include "null-ptr.h". (main): Use zerosize_ptr() instead of null_ptr(). * modules/memmem-tests (Files): Remove tests/null-ptr.h.
author Bruno Haible <bruno@clisp.org>
date Sat, 09 Mar 2019 20:32:25 +0100
parents b06060465f09
children
comparison
equal deleted inserted replaced
40213:cc3fed3b7788 40214:452ab00796c7
36 36
37 char * 37 char *
38 xmemdup0 (void const *p, size_t s) 38 xmemdup0 (void const *p, size_t s)
39 { 39 {
40 char *result = xcharalloc (s + 1); 40 char *result = xcharalloc (s + 1);
41 memcpy (result, p, s); 41 if (s > 0)
42 memcpy (result, p, s);
42 result[s] = 0; 43 result[s] = 0;
43 return result; 44 return result;
44 } 45 }