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/*
* Copyright (C) 2006 Martin Willi
* Hochschule fuer Technik Rapperswil
*
* 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 2 of the License, or (at your
* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
*
* 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.
*
* $Id: enum.c 3589 2008-03-13 14:14:44Z martin $
*/
#include <stddef.h>
#include <stdio.h>
#include "enum.h"
#include <printf_hook.h>
/**
* get the name of an enum value in a enum_name_t list
*/
static char *enum_name(enum_name_t *e, int val)
{
do
{
if (val >= e->first && val <= e->last)
{
return e->names[val - e->first];
}
}
while ((e = e->next));
return NULL;
}
/**
* output handler in printf() for enum names
*/
static int print(FILE *stream, const struct printf_info *info,
const void *const *args)
{
enum_name_t *ed = *((enum_name_t**)(args[0]));
int val = *((int*)(args[1]));
char *name = enum_name(ed, val);
if (name == NULL)
{
return fprintf(stream, "(%d)", val);
}
else
{
return fprintf(stream, "%s", name);
}
}
/**
* arginfo handler for printf() hook
*/
static int arginfo(const struct printf_info *info, size_t n, int *argtypes)
{
if (n > 1)
{
argtypes[0] = PA_POINTER;
argtypes[1] = PA_INT;
}
return 2;
}
/**
* return printf hook functions
*/
printf_hook_functions_t enum_get_printf_hooks()
{
printf_hook_functions_t hooks = {print, arginfo};
return hooks;
}
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