/*
 * Copyright © 2010 Intel Corporation
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice (including the next
 * paragraph) shall be included in all copies or substantial portions of the
 * Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 */

#ifndef GLCPP_H
#define GLCPP_H

#include <talloc.h>

#include "hash_table.h"

#define yyscan_t void*

/* Some data types used for parser values. */

typedef struct string_node {
	const char *str;
	struct string_node *next;
} string_node_t;

typedef struct string_list {
	string_node_t *head;
	string_node_t *tail;
} string_list_t;

typedef struct argument_node {
	string_list_t *argument;
	struct argument_node *next;
} argument_node_t;

typedef struct argument_list {
	argument_node_t *head;
	argument_node_t *tail;
} argument_list_t;

typedef struct glcpp_parser glcpp_parser_t;

/* Support for temporarily lexing/parsing tokens from a string. */

typedef struct glcpp_lex_node {
	void *buffer;
	struct glcpp_lex_node *next;
} glcpp_lex_node_t;

typedef struct {
	glcpp_parser_t *parser;
	glcpp_lex_node_t *head;
} glcpp_lex_stack_t;

void
glcpp_lex_stack_push (glcpp_lex_stack_t *stack, const char *string);

int
glcpp_lex_stack_pop (glcpp_lex_stack_t *stack);

typedef enum {
	TOKEN_CLASS_ARGUMENT,
	TOKEN_CLASS_IDENTIFIER,
	TOKEN_CLASS_FUNC_MACRO,
	TOKEN_CLASS_OBJ_MACRO
} token_class_t;

token_class_t
glcpp_parser_classify_token (glcpp_parser_t *parser,
			     const char *identifier,
			     int *parameter_index);

typedef struct {
	int is_function;
	string_list_t *parameters;
	const char *identifier;
	const char *replacement;
} macro_t;

typedef struct expansion_node {
	macro_t *macro;
	argument_list_t *arguments;
	struct expansion_node *next;
} expansion_node_t;

struct glcpp_parser {
	yyscan_t scanner;
	struct hash_table *defines;
	expansion_node_t *expansions;
	glcpp_lex_stack_t *lex_stack;
};

glcpp_parser_t *
glcpp_parser_create (void);

int
glcpp_parser_parse (glcpp_parser_t *parser);

void
glcpp_parser_destroy (glcpp_parser_t *parser);

void
glcpp_parser_push_expansion_macro (glcpp_parser_t *parser,
				   macro_t *macro,
				   argument_list_t *arguments);

void
glcpp_parser_push_expansion_argument (glcpp_parser_t *parser,
				      int argument_index);

void
glcpp_parser_pop_expansion (glcpp_parser_t *parser);

/* Generated by glcpp-lex.l to glcpp-lex.c */

int
glcpp_lex_init_extra (glcpp_parser_t *parser, yyscan_t* scanner);

int
glcpp_lex (yyscan_t scanner);

int
glcpp_lex_destroy (yyscan_t scanner);

/* Generated by glcpp-parse.y to glcpp-parse.c */

int
yyparse (glcpp_parser_t *parser);

/* xtalloc - wrappers around talloc to check for out-of-memory */

#define xtalloc(ctx, type) (type *)xtalloc_named_const(ctx, sizeof(type), #type)

#define xtalloc_size(ctx, size) xtalloc_named_const(ctx, size, __location__)

void *
xtalloc_named_const (const void *context, size_t size, const char *name);

char *
xtalloc_strdup (const void *t, const char *p);

char *
xtalloc_strndup (const void *t, const char *p, size_t n);

#endif