Subversion Repositories HelenOS

Rev

Rev 2670 | Rev 3351 | Go to most recent revision | Blame | Compare with Previous | Last modification | View Log | Download | RSS feed

  1. /*
  2.  * Copyright (c) 2006 Josef Cejka
  3.  * Copyright (c) 2008 Jakub Jermar
  4.  * All rights reserved.
  5.  *
  6.  * Redistribution and use in source and binary forms, with or without
  7.  * modification, are permitted provided that the following conditions
  8.  * are met:
  9.  *
  10.  * - Redistributions of source code must retain the above copyright
  11.  *   notice, this list of conditions and the following disclaimer.
  12.  * - Redistributions in binary form must reproduce the above copyright
  13.  *   notice, this list of conditions and the following disclaimer in the
  14.  *   documentation and/or other materials provided with the distribution.
  15.  * - The name of the author may not be used to endorse or promote products
  16.  *   derived from this software without specific prior written permission.
  17.  *
  18.  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  19.  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  20.  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  21.  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  22.  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  23.  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  24.  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  25.  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  26.  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  27.  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  28.  */
  29.  
  30. /** @addtogroup libc
  31.  * @{
  32.  */
  33. /** @file
  34.  */
  35.  
  36. #include <stdarg.h>
  37. #include <stdio.h>
  38. #include <stdlib.h>
  39. #include <io/printf_core.h>
  40.  
  41. static int asprintf_prewrite(const char *str, size_t count, void *unused)
  42. {
  43.     return count;
  44. }
  45.  
  46. int asprintf(char **strp, const char *fmt, ...)
  47. {
  48.     struct printf_spec ps = {
  49.          asprintf_prewrite,
  50.          NULL
  51.     };
  52.     int ret;
  53.     va_list args;
  54.  
  55.     va_start(args, fmt);
  56.     ret = printf_core(fmt, &ps, args);
  57.     va_end(args);
  58.     if (ret > 0) {
  59.         *strp = malloc(ret + 20);
  60.         if (!*strp)
  61.             return -1;
  62.         va_start(args, fmt);
  63.         vsprintf(*strp, fmt, args);
  64.         va_end(args);      
  65.     }
  66.  
  67.     return ret;
  68. }
  69.  
  70. /** @}
  71.  */
  72.