src/lib/string/compat_string.h

   1 /* Copyright (c) 2003-2004, Roger Dingledine
   2  * Copyright (c) 2004-2006, Roger Dingledine, Nick Mathewson.
   3  * Copyright (c) 2007-2021, The Tor Project, Inc. */
   4 /* See LICENSE for licensing information */
   5
   6 /**
   7  * \file compat_string.h
   8  * \brief Header for compat_string.c
   9  **/
  10
  11 #ifndef TOR_COMPAT_STRING_H
  12 #define TOR_COMPAT_STRING_H
  13
  14 #include "orconfig.h"
  15 #include "lib/cc/compat_compiler.h"
  16
  17 #include <stddef.h>
  18
  19 /* ===== String compatibility */
  20 #ifdef _WIN32
  21 /* Windows doesn't have str(n)casecmp, but mingw defines it: only define it
  22  * ourselves if it's missing. */
  23 #ifndef HAVE_STRNCASECMP
  24 static inline int strncasecmp(const char *a, const char *b, size_t n);
  25 static inline int strncasecmp(const char *a, const char *b, size_t n) {
  26   return _strnicmp(a,b,n);
  27 }
  28 #endif /* !defined(HAVE_STRNCASECMP) */
  29 #ifndef HAVE_STRCASECMP
  30 static inline int strcasecmp(const char *a, const char *b);
  31 static inline int strcasecmp(const char *a, const char *b) {
  32   return _stricmp(a,b);
  33 }
  34 #endif /* !defined(HAVE_STRCASECMP) */
  35 #endif /* defined(_WIN32) */
  36
  37 #if defined __APPLE__
  38 /* On OSX 10.9 and later, the overlap-checking code for strlcat would
  39  * appear to have a severe bug that can sometimes cause aborts in Tor.
  40  * Instead, use the non-checking variants.  This is sad.
  41  *
  42  * (If --enable-fragile-hardening is passed to configure, we use the hardened
  43  * variants, which do not suffer from this issue.)
  44  *
  45  * See https://bugs.torproject.org/tpo/core/tor/15205.
  46  */
  47 #undef strlcat
  48 #undef strlcpy
  49 #endif /* defined __APPLE__ */
  50
  51 #ifndef HAVE_STRLCAT
  52 size_t strlcat(char *dst, const char *src, size_t siz);
  53 #endif
  54 #ifndef HAVE_STRLCPY
  55 size_t strlcpy(char *dst, const char *src, size_t siz);
  56 #endif
  57
  58 char *tor_strtok_r_impl(char *str, const char *sep, char **lasts);
  59 #ifdef HAVE_STRTOK_R
  60 #define tor_strtok_r(str, sep, lasts) strtok_r(str, sep, lasts)
  61 #else
  62 #define tor_strtok_r(str, sep, lasts) tor_strtok_r_impl(str, sep, lasts)
  63 #endif
  64
  65 #endif /* !defined(TOR_COMPAT_STRING_H) */