85 lines
1.7 KiB
C
85 lines
1.7 KiB
C
/*
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* Copyright (C) 2006 Martin Willi
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* Hochschule fuer Technik Rapperswil
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*
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* $Id$
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*/
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#include <stddef.h>
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#include <stdio.h>
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#include "enum.h"
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#include <printf_hook.h>
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/**
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* get the name of an enum value in a enum_name_t list
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*/
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static char *enum_name(enum_name_t *e, int val)
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{
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do
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{
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if (val >= e->first && val <= e->last)
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{
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return e->names[val - e->first];
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}
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}
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while ((e = e->next));
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return NULL;
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}
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/**
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* output handler in printf() for enum names
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*/
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static int print(FILE *stream, const struct printf_info *info,
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const void *const *args)
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{
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enum_name_t *ed = *((enum_name_t**)(args[0]));
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int val = *((int*)(args[1]));
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char *name = enum_name(ed, val);
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if (name == NULL)
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{
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return fprintf(stream, "(%d)", val);
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}
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else
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{
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return fprintf(stream, "%s", name);
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}
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}
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/**
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* arginfo handler for printf() hook
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*/
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static int arginfo(const struct printf_info *info, size_t n, int *argtypes)
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{
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if (n > 1)
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{
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argtypes[0] = PA_POINTER;
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argtypes[1] = PA_INT;
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}
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return 2;
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}
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/**
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* return printf hook functions
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*/
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printf_hook_functions_t enum_get_printf_hooks()
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{
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printf_hook_functions_t hooks = {print, arginfo};
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return hooks;
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}
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