/*
 * Copyright (C) 2010 Dan Carpenter.
 *
 * 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.
 *
 * 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.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, see http://www.gnu.org/copyleft/gpl.txt
 */

/*
 * This file is only for very generic stuff, that is reusable
 * between projects.  If you need something special create a
 * check_your_project.c.
 *
 */

#include "smatch.h"
#include "smatch_extra.h"
#include "smatch_function_hashtable.h"

static DEFINE_HASHTABLE_INSERT(insert_func, char, int);
static DEFINE_HASHTABLE_SEARCH(search_func, char, int);
static struct hashtable *skipped_funcs;
static struct hashtable *silenced_funcs;
static struct hashtable *no_inline_funcs;

int is_skipped_function(void)
{
        char *func;

        func = get_function();
        if (!func)
                return 0;
        if (search_func(skipped_funcs, func))
                return 1;
        return 0;
}

/*
 * A silenced function will still be processed and potentially appear in info
 * output, but not regular checks.
 */
int is_silenced_function(void)
{
        char *func;

        if (is_skipped_function())
                return 1;

        func = get_function();
        if (!func)
                return 0;
        if (search_func(silenced_funcs, func))
                return 1;
        return 0;
}

int is_no_inline_function(const char *function)
{
        if (search_func(no_inline_funcs, (char *)function))
                return 1;
        return 0;
}

static void register_no_return_funcs(void)
{
        struct token *token;
        const char *func;
        char name[256];

        snprintf(name, 256, "%s.no_return_funcs", option_project_str);

        token = get_tokens_file(name);
        if (!token)
                return;
        if (token_type(token) != TOKEN_STREAMBEGIN)
                return;
        token = token->next;
        while (token_type(token) != TOKEN_STREAMEND) {
                if (token_type(token) != TOKEN_IDENT)
                        return;
                func = show_ident(token->ident);
                add_function_hook(func, &__match_nullify_path_hook, NULL);
                token = token->next;
        }
        clear_token_alloc();
}

static void register_ignored_macros(void)
{
        struct token *token;
        char *macro;
        char name[256];

        if (option_project == PROJ_NONE)
                strcpy(name, "ignored_macros");
        else
                snprintf(name, 256, "%s.ignored_macros", option_project_str);

        token = get_tokens_file(name);
        if (!token)
                return;
        if (token_type(token) != TOKEN_STREAMBEGIN)
                return;
        token = token->next;
        while (token_type(token) != TOKEN_STREAMEND) {
                if (token_type(token) != TOKEN_IDENT)
                        return;
                macro = alloc_string(show_ident(token->ident));
                add_ptr_list(&__ignored_macros, macro);
                token = token->next;
        }
        clear_token_alloc();
}

static void register_skipped_functions(void)
{
        struct token *token;
        char *func;
        char name[256];

        skipped_funcs = create_function_hashtable(500);

        if (option_project == PROJ_NONE)
                return;

        snprintf(name, 256, "%s.skipped_functions", option_project_str);

        token = get_tokens_file(name);
        if (!token)
                return;
        if (token_type(token) != TOKEN_STREAMBEGIN)
                return;
        token = token->next;
        while (token_type(token) != TOKEN_STREAMEND) {
                if (token_type(token) != TOKEN_IDENT)
                        return;
                func = alloc_string(show_ident(token->ident));
                insert_func(skipped_funcs, func, INT_PTR(1));
                token = token->next;
        }
        clear_token_alloc();
}

static void register_silenced_functions(void)
{
        struct token *token;
        char *func;
        char name[256];

        silenced_funcs = create_function_hashtable(500);

        if (option_project == PROJ_NONE)
                return;

        snprintf(name, 256, "%s.silenced_functions", option_project_str);

        token = get_tokens_file(name);
        if (!token)
                return;
        if (token_type(token) != TOKEN_STREAMBEGIN)
                return;
        token = token->next;
        while (token_type(token) != TOKEN_STREAMEND) {
                if (token_type(token) != TOKEN_IDENT)
                        return;
                func = alloc_string(show_ident(token->ident));
                insert_func(silenced_funcs, func, INT_PTR(1));
                token = token->next;
        }
        clear_token_alloc();
}

static void register_no_inline_functions(void)
{
        struct token *token;
        char *func;
        char name[256];

        no_inline_funcs = create_function_hashtable(500);

        if (option_project == PROJ_NONE)
                return;

        snprintf(name, 256, "%s.no_inline_functions", option_project_str);

        token = get_tokens_file(name);
        if (!token)
                return;
        if (token_type(token) != TOKEN_STREAMBEGIN)
                return;
        token = token->next;
        while (token_type(token) != TOKEN_STREAMEND) {
                if (token_type(token) != TOKEN_IDENT)
                        return;
                func = alloc_string(show_ident(token->ident));
                insert_func(no_inline_funcs, func, INT_PTR(1));
                token = token->next;
        }
        clear_token_alloc();
}

void register_project(int id)
{
        register_no_return_funcs();
        register_ignored_macros();
        register_skipped_functions();
        register_silenced_functions();
        register_no_inline_functions();
}