ACE/ace/OS_NS_string.cpp

   1 #include "ace/ACE.h"
   2 #include "ace/Global_Macros.h"
   3 #include "ace/OS_NS_string.h"
   4 #include "ace/OS_NS_stdio.h"
   5 #include "ace/OS_NS_stdlib.h"
   6
   7 #if !defined (ACE_HAS_INLINED_OSCALLS)
   8 # include "ace/OS_NS_string.inl"
   9 #endif /* ACE_HAS_INLINED_OSCALLS */
  10
  11 #if defined (ACE_HAS_ALLOC_HOOKS)
  12 # include "ace/Malloc_Base.h"
  13 #endif /* ACE_HAS_ALLOC_HOOKS */
  14
  15 ACE_BEGIN_VERSIONED_NAMESPACE_DECL
  16
  17 #if (defined (ACE_LACKS_STRDUP) && !defined (ACE_STRDUP_EQUIVALENT)) \
  18   || defined (ACE_HAS_STRDUP_EMULATION)
  19 char *
  20 ACE_OS::strdup_emulation (const char *s)
  21 {
  22 #if defined (ACE_HAS_ALLOC_HOOKS)
  23   char *t = (char *) ACE_Allocator::instance()->malloc (ACE_OS::strlen (s) + 1);
  24 #else
  25   char *t = (char *) ACE_OS::malloc (ACE_OS::strlen (s) + 1);
  26 #endif /* ACE_HAS_ALLOC_HOOKS */
  27
  28   if (t == 0)
  29     return 0;
  30
  31   return ACE_OS::strcpy (t, s);
  32 }
  33 #endif /* (ACE_LACKS_STRDUP && !ACE_STRDUP_EQUIVALENT) || ... */
  34
  35 #if defined (ACE_HAS_WCHAR)
  36 #if (defined (ACE_LACKS_WCSDUP) && !defined (ACE_WCSDUP_EQUIVALENT)) \
  37   || defined (ACE_HAS_WCSDUP_EMULATION)
  38 wchar_t *
  39 ACE_OS::strdup_emulation (const wchar_t *s)
  40 {
  41   wchar_t *buffer =
  42     (wchar_t *) ACE_OS::malloc ((ACE_OS::strlen (s) + 1)
  43                                 * sizeof (wchar_t));
  44   if (buffer == 0)
  45     return 0;
  46
  47   return ACE_OS::strcpy (buffer, s);
  48 }
  49 #endif /* (ACE_LACKS_WCSDUP && !ACE_WCSDUP_EQUIVALENT) || ... */
  50 #endif /* ACE_HAS_WCHAR */
  51
  52 char *
  53 ACE_OS::strecpy (char *s, const char *t)
  54 {
  55   char *dscan = s;
  56   const char *sscan = t;
  57
  58   while ((*dscan++ = *sscan++) != '\0')
  59     continue;
  60
  61   return dscan;
  62 }
  63
  64 #if defined (ACE_HAS_WCHAR)
  65 wchar_t *
  66 ACE_OS::strecpy (wchar_t *s, const wchar_t *t)
  67 {
  68   wchar_t *dscan = s;
  69   const wchar_t *sscan = t;
  70
  71   while ((*dscan++ = *sscan++) != ACE_TEXT_WIDE ('\0'))
  72     continue;
  73
  74   return dscan;
  75 }
  76 #endif /* ACE_HAS_WCHAR */
  77
  78 char *
  79 ACE_OS::strerror (int errnum)
  80 {
  81   static char ret_errortext[128];
  82
  83   if (ACE::is_sock_error (errnum))
  84     {
  85       const ACE_TCHAR *errortext = ACE::sock_error (errnum);
  86       ACE_OS::strsncpy (ret_errortext,
  87                         ACE_TEXT_ALWAYS_CHAR (errortext),
  88                         sizeof (ret_errortext));
  89       return ret_errortext;
  90     }
  91 #if defined (ACE_LACKS_STRERROR)
  92   errno = EINVAL;
  93   return ACE_OS::strerror_emulation (errnum);
  94 #else /* ACE_LACKS_STRERROR */
  95   // Adapt to the various ways that strerror() indicates a bad errnum.
  96   // Most modern systems set errno to EINVAL. Some older platforms return
  97   // a pointer to a NULL string. This code makes the behavior more consistent
  98   // across platforms. On a bad errnum, we make a string with the error number
  99   // and set errno to EINVAL.
 100   ACE_Errno_Guard g (errno);
 101   errno = 0;
 102   char *errmsg = 0;
 103
 104 #if defined (ACE_HAS_TR24731_2005_CRT)
 105   errmsg = ret_errortext;
 106   ACE_SECURECRTCALL (strerror_s (ret_errortext, sizeof(ret_errortext), errnum),
 107                      char *, 0, errmsg);
 108   if (errnum < 0 || errnum >= _sys_nerr)
 109     g = EINVAL;
 110
 111   return errmsg;
 112 #elif defined (ACE_WIN32)
 113   if (errnum < 0 || errnum >= _sys_nerr)
 114     errno = EINVAL;
 115 #endif /* ACE_WIN32 */
 116   errmsg = ::strerror (errnum);
 117
 118   if (errno == EINVAL || errmsg == 0 || errmsg[0] == 0)
 119     {
 120       ACE_OS::snprintf (ret_errortext, 128, "Unknown error %d", errnum);
 121       errmsg = ret_errortext;
 122       g = EINVAL;
 123     }
 124   return errmsg;
 125 #endif /* ACE_LACKS_STRERROR */
 126 }
 127
 128 #if defined (ACE_LACKS_STRERROR)
 129 /**
 130  * Just returns "Unknown Error" all the time.
 131  */
 132 char *
 133 ACE_OS::strerror_emulation (int)
 134 {
 135   return const_cast <char*> ("Unknown Error");
 136 }
 137 #endif /* ACE_LACKS_STRERROR */
 138
 139 char *
 140 ACE_OS::strsignal (int signum)
 141 {
 142   static char signal_text[128];
 143 #if defined (ACE_HAS_STRSIGNAL)
 144   char *ret_val = 0;
 145
 146 # if defined (ACE_NEEDS_STRSIGNAL_RANGE_CHECK)
 147   if (signum < 0 || signum >= ACE_NSIG)
 148     ret_val = 0;
 149   else
 150 # endif /* (ACE_NEEDS_STRSIGNAL_RANGE_CHECK */
 151   ret_val = ::strsignal (signum);
 152
 153   if (ret_val <= reinterpret_cast<char *> (0))
 154     {
 155       ACE_OS::snprintf (signal_text, 128, "Unknown signal: %d", signum);
 156       ret_val = signal_text;
 157     }
 158   return ret_val;
 159 #else
 160   if (signum < 0 || signum >= ACE_NSIG)
 161     {
 162       ACE_OS::snprintf (signal_text, 128, "Unknown signal: %d", signum);
 163       return signal_text;
 164     }
 165 # if defined (ACE_SYS_SIGLIST)
 166   return ACE_SYS_SIGLIST[signum];
 167 # else
 168   ACE_OS::snprintf (signal_text, 128, "Signal: %d", signum);
 169   return signal_text;
 170 # endif /* ACE_SYS_SIGLIST */
 171 #endif /* ACE_HAS_STRSIGNAL */
 172 }
 173
 174 char *
 175 ACE_OS::strerror_r (int errnum, char *buf, size_t buflen)
 176 {
 177 #ifdef ACE_HAS_STRERROR_R
 178 # ifdef ACE_HAS_STRERROR_R_XSI
 179   if (::strerror_r (errnum, buf, buflen) == 0)
 180     return buf;
 181   return const_cast <char*> ("Unknown Error");
 182 # else
 183   return ::strerror_r (errnum, buf, buflen);
 184 # endif
 185 #else
 186   return ACE_OS::strncpy (buf, strerror (errnum), buflen);
 187 #endif
 188 }
 189
 190 const char *
 191 ACE_OS::strnchr (const char *s, int c, size_t len)
 192 {
 193   for (size_t i = 0; i < len; ++i)
 194     if (s[i] == c)
 195       return s + i;
 196
 197   return 0;
 198 }
 199
 200 const ACE_WCHAR_T *
 201 ACE_OS::strnchr (const ACE_WCHAR_T *s, ACE_WCHAR_T c, size_t len)
 202 {
 203   for (size_t i = 0; i < len; ++i)
 204     {
 205       if (s[i] == c)
 206         {
 207           return s + i;
 208         }
 209     }
 210
 211   return 0;
 212 }
 213
 214 const char *
 215 ACE_OS::strnstr (const char *s1, const char *s2, size_t len2)
 216 {
 217   // Substring length
 218   size_t const len1 = ACE_OS::strlen (s1);
 219
 220   // Check if the substring is longer than the string being searched.
 221   if (len2 > len1)
 222     return 0;
 223
 224   // Go upto <len>
 225   size_t const len = len1 - len2;
 226
 227   for (size_t i = 0; i <= len; i++)
 228     {
 229       if (ACE_OS::memcmp (s1 + i, s2, len2) == 0)
 230         {
 231          // Found a match!  Return the index.
 232           return s1 + i;
 233         }
 234     }
 235
 236   return 0;
 237 }
 238
 239 const ACE_WCHAR_T *
 240 ACE_OS::strnstr (const ACE_WCHAR_T *s1, const ACE_WCHAR_T *s2, size_t len2)
 241 {
 242   // Substring length
 243   size_t const len1 = ACE_OS::strlen (s1);
 244
 245   // Check if the substring is longer than the string being searched.
 246   if (len2 > len1)
 247     return 0;
 248
 249   // Go upto <len>
 250   size_t const len = len1 - len2;
 251
 252   for (size_t i = 0; i <= len; i++)
 253     {
 254       if (ACE_OS::memcmp (s1 + i, s2, len2 * sizeof (ACE_WCHAR_T)) == 0)
 255         {
 256           // Found a match!  Return the index.
 257           return s1 + i;
 258         }
 259     }
 260
 261   return 0;
 262 }
 263
 264 char *
 265 ACE_OS::strsncpy (char *dst, const char *src, size_t maxlen)
 266 {
 267   char *rdst = dst;
 268   const char *rsrc = src;
 269   size_t rmaxlen = maxlen;
 270
 271   if (rmaxlen > 0)
 272     {
 273       if (rdst!=rsrc)
 274         {
 275           *rdst = '\0';
 276           if (rsrc != 0)
 277             {
 278               ACE_OS::strncat (rdst, rsrc, --rmaxlen);
 279             }
 280         }
 281       else
 282         {
 283           rdst += (rmaxlen - 1);
 284           *rdst = '\0';
 285         }
 286     }
 287   return dst;
 288 }
 289
 290 ACE_WCHAR_T *
 291 ACE_OS::strsncpy (ACE_WCHAR_T *dst, const ACE_WCHAR_T *src, size_t maxlen)
 292 {
 293   ACE_WCHAR_T *rdst = dst;
 294   const ACE_WCHAR_T *rsrc = src;
 295   size_t rmaxlen = maxlen;
 296
 297   if (rmaxlen > 0)
 298     {
 299       if (rdst!= rsrc)
 300         {
 301           *rdst = ACE_TEXT_WIDE ('\0');
 302           if (rsrc != 0)
 303             {
 304               ACE_OS::strncat (rdst, rsrc, --rmaxlen);
 305             }
 306         }
 307       else
 308         {
 309           rdst += (rmaxlen - 1);
 310           *rdst = ACE_TEXT_WIDE ('\0');
 311         }
 312     }
 313   return dst;
 314 }
 315
 316 #if defined (ACE_LACKS_STRTOK_R)
 317 char *
 318 ACE_OS::strtok_r_emulation (char *s, const char *tokens, char **lasts)
 319 {
 320   if (s == 0)
 321     s = *lasts;
 322   else
 323     *lasts = s;
 324   if (*s == 0)                  // We have reached the end
 325     return 0;
 326   size_t const l_org = ACE_OS::strlen (s);
 327   s = ::strtok (s, tokens);
 328   if (s == 0)
 329     return 0;
 330   size_t const l_sub = ACE_OS::strlen (s);
 331   if (s + l_sub < *lasts + l_org)
 332     *lasts = s + l_sub + 1;
 333   else
 334     *lasts = s + l_sub;
 335   return s ;
 336 }
 337 #endif /* ACE_LACKS_STRTOK_R */
 338
 339 # if defined (ACE_HAS_WCHAR) && defined (ACE_LACKS_WCSTOK)
 340 wchar_t*
 341 ACE_OS::strtok_r_emulation (ACE_WCHAR_T *s,
 342                             const ACE_WCHAR_T *tokens,
 343                             ACE_WCHAR_T **lasts)
 344 {
 345   ACE_WCHAR_T* sbegin = s ? s : *lasts;
 346   sbegin += ACE_OS::strspn(sbegin, tokens);
 347   if (*sbegin == 0)
 348     {
 349       static ACE_WCHAR_T empty[1] = { 0 };
 350       *lasts = empty;
 351       return 0;
 352   }
 353   ACE_WCHAR_T*send = sbegin + ACE_OS::strcspn(sbegin, tokens);
 354   if (*send != 0)
 355       *send++ = 0;
 356   *lasts = send;
 357   return sbegin;
 358 }
 359 # endif  /* ACE_HAS_WCHAR && ACE_LACKS_WCSTOK */
 360
 361 ACE_END_VERSIONED_NAMESPACE_DECL