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glibc  2.9
Defines | Functions
_strerror.c File Reference
#include <libintl.h>
#include <stdio.h>
#include <string.h>
#include <sys/param.h>
#include <stdio-common/_itoa.h>
#include <locale.h>

Go to the source code of this file.

Defines

#define dgettext(domainname, msgid)   dcgettext (domainname, msgid, LC_MESSAGES)

Functions

char * __strerror_r (int errnum, char *buf, size_t buflen)

Define Documentation

#define dgettext (   domainname,
  msgid 
)    dcgettext (domainname, msgid, LC_MESSAGES)

Definition at line 32 of file _strerror.c.


Function Documentation

char* __strerror_r ( int  errnum,
char *  buf,
size_t  buflen 
)

Definition at line 37 of file _strerror.c.

{
  if (__builtin_expect (errnum < 0 || errnum >= _sys_nerr_internal
                     || _sys_errlist_internal[errnum] == NULL, 0))
    {
      /* Buffer we use to print the number in.  For a maximum size for
        `int' of 8 bytes we never need more than 20 digits.  */
      char numbuf[21];
      const char *unk = _("Unknown error ");
      const size_t unklen = strlen (unk);
      char *p, *q;

      numbuf[20] = '\0';
      p = _itoa_word (errnum, &numbuf[20], 10, 0);

      /* Now construct the result while taking care for the destination
        buffer size.  */
      q = __mempcpy (buf, unk, MIN (unklen, buflen));
      if (unklen < buflen)
       memcpy (q, p, MIN ((size_t) (&numbuf[21] - p), buflen - unklen));

      /* Terminate the string in any case.  */
      if (buflen > 0)
       buf[buflen - 1] = '\0';

      return buf;
    }

  return (char *) _(_sys_errlist_internal[errnum]);
}

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