kc3-lang/gnulib/lib/c-vasnprintf.h

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• Hash : 281b825e
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  Date : 2018-01-01T00:57:25
  

  maint: Run 'make update-copyright'
  

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• lib/c-vasnprintf.h

• /* vsprintf with automatic memory allocation in C locale.
     Copyright (C) 2002-2004, 2007-2018 Free Software Foundation, Inc.
  
     This program is free software; you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published by
     the Free Software Foundation; either version 3, or (at your option)
     any later version.
  
     This program is distributed in the hope that it will be useful,
     but WITHOUT ANY WARRANTY; without even the implied warranty of
     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     GNU General Public License for more details.
  
     You should have received a copy of the GNU General Public License along
     with this program; if not, see <https://www.gnu.org/licenses/>.  */
  
  #ifndef _C_VASNPRINTF_H
  #define _C_VASNPRINTF_H
  
  /* Get va_list.  */
  #include <stdarg.h>
  
  /* Get size_t.  */
  #include <stddef.h>
  
  /* The __attribute__ feature is available in gcc versions 2.5 and later.
     The __-protected variants of the attributes 'format' and 'printf' are
     accepted by gcc versions 2.6.4 (effectively 2.7) and later.
     We enable _GL_ATTRIBUTE_FORMAT only if these are supported too, because
     gnulib and libintl do '#define printf __printf__' when they override
     the 'printf' function.  */
  #if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 7)
  # define _GL_ATTRIBUTE_FORMAT(spec) __attribute__ ((__format__ spec))
  #else
  # define _GL_ATTRIBUTE_FORMAT(spec) /* empty */
  #endif
  
  #ifdef __cplusplus
  extern "C" {
  #endif
  
  /* Write formatted output to a string dynamically allocated with malloc().
     You can pass a preallocated buffer for the result in RESULTBUF and its
     size in *LENGTHP; otherwise you pass RESULTBUF = NULL.
     If successful, return the address of the string (this may be = RESULTBUF
     if no dynamic memory allocation was necessary) and set *LENGTHP to the
     number of resulting bytes, excluding the trailing NUL.  Upon error, set
     errno and return NULL.
  
     When dynamic memory allocation occurs, the preallocated buffer is left
     alone (with possibly modified contents).  This makes it possible to use
     a statically allocated or stack-allocated buffer, like this:
  
            char buf[100];
            size_t len = sizeof (buf);
            char *output = vasnprintf (buf, &len, format, args);
            if (output == NULL)
              ... error handling ...;
            else
              {
                ... use the output string ...;
                if (output != buf)
                  free (output);
              }
  
     Formatting takes place in the C locale, that is, the decimal point used in
     floating-point formatting directives is always '.'.
    */
  extern char *c_vasnprintf (char *resultbuf, size_t *lengthp, const char *format, va_list args)
         _GL_ATTRIBUTE_FORMAT ((__printf__, 3, 0));
  
  #ifdef __cplusplus
  }
  #endif
  
  #endif /* _C_VASNPRINTF_H */
  

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