include/Xprintf.h

   1 /*
   2  * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  21  * DEALINGS IN THE SOFTWARE.
  22  */
  23
  24 #ifndef XPRINTF_H
  25 #define XPRINTF_H
  26
  27 #include <stdio.h>
  28 #include <stdarg.h>
  29 #include <X11/Xfuncproto.h>
  30
  31 #ifndef _X_RESTRICT_KYWD
  32 #if defined(restrict) /* assume autoconf set it correctly */ || \
  33    (defined(__STDC__) && (__STDC_VERSION__ - 0 >= 199901L))     /* C99 */
  34 #define _X_RESTRICT_KYWD  restrict
  35 #elif defined(__GNUC__) && !defined(__STRICT_ANSI__)    /* gcc w/C89+extensions */
  36 #define _X_RESTRICT_KYWD __restrict__
  37 #else
  38 #define _X_RESTRICT_KYWD
  39 #endif
  40 #endif
  41
  42 /*
  43  * These functions provide a portable implementation of the common (but not
  44  * yet universal) asprintf & vasprintf routines to allocate a buffer big
  45  * enough to sprintf the arguments to.  The XNF variants terminate the server
  46  * if the allocation fails.
  47  * The buffer allocated is returned in the pointer provided in the first
  48  * argument.   The return value is the size of the allocated buffer, or -1
  49  * on failure.
  50  */
  51 extern _X_EXPORT int
  52 Xasprintf(char **ret, const char *_X_RESTRICT_KYWD fmt, ...)
  53 _X_ATTRIBUTE_PRINTF(2, 3);
  54 extern _X_EXPORT int
  55 Xvasprintf(char **ret, const char *_X_RESTRICT_KYWD fmt, va_list va)
  56 _X_ATTRIBUTE_PRINTF(2, 0);
  57 extern _X_EXPORT int
  58 XNFasprintf(char **ret, const char *_X_RESTRICT_KYWD fmt, ...)
  59 _X_ATTRIBUTE_PRINTF(2, 3);
  60 extern _X_EXPORT int
  61 XNFvasprintf(char **ret, const char *_X_RESTRICT_KYWD fmt, va_list va)
  62 _X_ATTRIBUTE_PRINTF(2, 0);
  63
  64 #if !defined(HAVE_ASPRINTF) && !defined(HAVE_VASPRINTF)
  65 #define asprintf  Xasprintf
  66 #define vasprintf Xvasprintf
  67 #endif
  68
  69 /*
  70  * These functions provide a portable implementation of the linux kernel
  71  * scnprintf & vscnprintf routines that return the number of bytes actually
  72  * copied during a snprintf, (excluding the final '\0').
  73  */
  74 extern _X_EXPORT int
  75 Xscnprintf(char *s, int n, const char * _X_RESTRICT_KYWD fmt, ...)
  76 _X_ATTRIBUTE_PRINTF(3,4);
  77 extern _X_EXPORT int
  78 Xvscnprintf(char *s, int n, const char * _X_RESTRICT_KYWD fmt, va_list va)
  79 _X_ATTRIBUTE_PRINTF(3,0);
  80
  81 #endif                          /* XPRINTF_H */