src/libstrongswan/definitions.c

   1 /**
   2  * @file definitions.c
   3  *
   4  * @brief General purpose definitions and macros.
   5  *
   6  */
   7
   8 /*
   9  * Copyright (C) 2005-2006 Martin Willi
  10  * Copyright (C) 2005 Jan Hutter
  11  * Hochschule fuer Technik Rapperswil
  12  *
  13  * This program is free software; you can redistribute it and/or modify it
  14  * under the terms of the GNU General Public License as published by the
  15  * Free Software Foundation; either version 2 of the License, or (at your
  16  * option) any later version.  See <http://www.fsf.org/copyleft/gpl.txt>.
  17  *
  18  * This program is distributed in the hope that it will be useful, but
  19  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  20  * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  21  * for more details.
  22  */
  23
  24 #include <printf.h>
  25 #include <stdio.h>
  26
  27 #include "definitions.h"
  28
  29 /*
  30  * Described in header
  31  */
  32 static char *enum_name(enum_name_t *e, long val)
  33 {
  34         do
  35         {
  36                 if (val >= e->first && val <= e->last)
  37                 {
  38                         return e->names[val - e->first];
  39                 }
  40         }
  41         while ((e = e->next));
  42         return NULL;
  43 }
  44
  45
  46 /**
  47  * output handler in printf() for enum names
  48  */
  49 static int print_enum(FILE *stream, const struct printf_info *info,
  50                                            const void *const *args)
  51 {
  52         enum_name_t *ed = *((void**)(args[0]));
  53         long val = *((size_t*)(args[1]));
  54         char *name;
  55
  56         name = enum_name(ed, val);
  57         if (name == NULL)
  58         {
  59                 return fprintf(stream, "(unknown enum value: %ld)", val);
  60         }
  61         return fprintf(stream, "%s", name);
  62 }
  63
  64 /**
  65  * arginfo handler in printf() for enum names
  66  */
  67 static int print_enum_arginfo(const struct printf_info *info, size_t n, int *argtypes)
  68 {
  69         if (n > 1)
  70         {
  71                 /* enum_names ptr */
  72                 argtypes[0] = PA_POINTER;
  73                 /* value */
  74                 argtypes[1] = PA_INT;
  75         }
  76         return 2;
  77 }
  78
  79 /**
  80  * register printf() handlers for enum names
  81  */
  82 static void __attribute__ ((constructor))print_register()
  83 {
  84         register_printf_function(ENUM_PRINTF_SPEC, print_enum, print_enum_arginfo);
  85 }