[babeltrace.git] / formats / ctf / metadata / ctf-parser.y

%{
/*
 * ctf-parser.y
 *
 * Common Trace Format Metadata Grammar.
 *
 * Copyright 2010 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
 *
 * 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 shall be included in
 * all copies or substantial portions of the Software.
 */

#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <stdlib.h>
#include <assert.h>
#include <helpers/list.h>
#include <glib.h>
#include "ctf-scanner.h"
#include "ctf-parser.h"
#include "ctf-ast.h"

#define printf_dbg(fmt, args...)	fprintf(stderr, "%s: " fmt, __func__, args)
#define printf_dbg_noarg(fmt)	fprintf(stderr, "%s: " fmt, __func__)

int yyparse(struct ctf_scanner *scanner);
int yylex(union YYSTYPE *yyval, struct ctf_scanner *scanner);
int yylex_init_extra(struct ctf_scanner *scanner, yyscan_t * ptr_yy_globals);
int yylex_destroy(yyscan_t yyscanner) ;
void yyset_in(FILE * in_str, yyscan_t scanner);

int yydebug;

struct gc_string {
	struct cds_list_head gc;
	char s[];
};

char *strredup(char **dest, const char *src)
{
	size_t len = strlen(src) + 1;

	*dest = realloc(*dest, len);
	if (!*dest)
		return NULL;
	strcpy(*dest, src);
	return *dest;
}

static struct gc_string *gc_string_alloc(struct ctf_scanner *scanner, size_t len)
{
	struct gc_string *gstr;

	gstr = malloc(sizeof(*gstr) + len);
	cds_list_add(&gstr->gc, &scanner->allocated_strings);
	return gstr;
}

void setstring(struct ctf_scanner *scanner, YYSTYPE *lvalp, const char *src)
{
	lvalp->gs = gc_string_alloc(scanner, strlen(src) + 1);
	strcpy(lvalp->gs->s, src);
}

static void init_scope(struct ctf_scanner_scope *scope,
		       struct ctf_scanner_scope *parent)
{
	scope->parent = parent;
	scope->types = g_hash_table_new_full(g_str_hash, g_str_equal,
					     (GDestroyNotify) free, NULL);
}

static void finalize_scope(struct ctf_scanner_scope *scope)
{
	g_hash_table_destroy(scope->types);
}

static void push_scope(struct ctf_scanner *scanner)
{
	struct ctf_scanner_scope *ns;

	printf_dbg_noarg("push scope\n");
	ns = malloc(sizeof(struct ctf_scanner_scope));
	init_scope(ns, scanner->cs);
	scanner->cs = ns;
}

static void pop_scope(struct ctf_scanner *scanner)
{
	struct ctf_scanner_scope *os;

	printf_dbg_noarg("pop scope\n");
	os = scanner->cs;
	scanner->cs = os->parent;
	finalize_scope(os);
	free(os);
}

static int lookup_type(struct ctf_scanner_scope *s, const char *id)
{
	int ret;

	ret = (int) g_hash_table_lookup(s->types, id);
	printf_dbg("lookup %p %s %d\n", s, id, ret);
	return ret;
}

int is_type(struct ctf_scanner *scanner, const char *id)
{
	struct ctf_scanner_scope *it;
	int ret = 0;

	for (it = scanner->cs; it != NULL; it = it->parent) {
		if (lookup_type(it, id)) {
			ret = 1;
			break;
		}
	}
	printf_dbg("is type %s %d\n", id, ret);
	return ret;
}

static void add_type(struct ctf_scanner *scanner, const char *id)
{
	char *type_id = NULL;

	printf_dbg("add type %s\n", id);
	if (lookup_type(scanner->cs, id))
		return;
	strredup(&type_id, id);
	g_hash_table_insert(scanner->cs->types, type_id, type_id);
}

void yyerror(struct ctf_scanner *scanner, const char *str)
{
	fprintf(stderr, "error %s\n", str);
}
 
int yywrap(void)
{
	return 1;
} 

static void free_strings(struct cds_list_head *list)
{
	struct gc_string *gstr, *tmp;

	cds_list_for_each_entry_safe(gstr, tmp, list, gc)
		free(gstr);
}

static struct ctf_ast *ctf_ast_alloc(void)
{
	struct ctf_ast *ast;

	ast = malloc(sizeof(*ast));
	if (!ast)
		return NULL;
	memset(ast, 0, sizeof(*ast));
	return ast;
}

static void ctf_ast_free(struct ctf_ast *ast)
{
}

int ctf_scanner_append_ast(struct ctf_scanner *scanner)
{
	return yyparse(scanner);
}

struct ctf_scanner *ctf_scanner_alloc(FILE *input)
{
	struct ctf_scanner *scanner;
	int ret;

	scanner = malloc(sizeof(*scanner));
	if (!scanner)
		return NULL;
	memset(scanner, 0, sizeof(*scanner));

	ret = yylex_init_extra(scanner, &scanner->scanner);
	if (ret) {
		fprintf(stderr, "yylex_init error\n");
		goto cleanup_scanner;
	}
	yyset_in(input, scanner);

	scanner->ast = ctf_ast_alloc();
	if (!scanner->ast)
		goto cleanup_lexer;
	init_scope(&scanner->root_scope, NULL);
	CDS_INIT_LIST_HEAD(&scanner->allocated_strings);

	return scanner;

cleanup_lexer:
	ret = yylex_destroy(scanner->scanner);
	if (!ret)
		fprintf(stderr, "yylex_destroy error\n");
cleanup_scanner:
	free(scanner);
	return NULL;
}

void ctf_scanner_free(struct ctf_scanner *scanner)
{
	int ret;

	finalize_scope(&scanner->root_scope);
	free_strings(&scanner->allocated_strings);
	ctf_ast_free(scanner->ast);
	ret = yylex_destroy(scanner->scanner);
	if (ret)
		fprintf(stderr, "yylex_destroy error\n");
	free(scanner);
}

%}

%define api.pure
	/* %locations */
%parse-param {struct ctf_scanner *scanner}
%lex-param {struct ctf_scanner *scanner}
%start file
%token CHARACTER_CONSTANT_START SQUOTE STRING_LITERAL_START DQUOTE ESCSEQ CHAR_STRING_TOKEN LSBRAC RSBRAC LPAREN RPAREN LBRAC RBRAC RARROW STAR PLUS MINUS LT GT TYPEASSIGN COLON SEMICOLON DOTDOTDOT DOT EQUAL COMMA CONST CHAR DOUBLE ENUM EVENT FLOATING_POINT FLOAT INTEGER INT LONG SHORT SIGNED STREAM STRING STRUCT TRACE TYPEALIAS TYPEDEF UNSIGNED VARIANT VOID _BOOL _COMPLEX _IMAGINARY DECIMAL_CONSTANT OCTAL_CONSTANT HEXADECIMAL_CONSTANT
%token <gs> IDENTIFIER ID_TYPE
%token ERROR
%union
{
	long long ll;
	char c;
	struct gc_string *gs;
	struct ctf_node *n;
}

%%

file:
		declaration
	|	file declaration
	;

keywords:
		VOID
	|	CHAR
	|	SHORT
	|	INT
	|	LONG
	|	FLOAT
	|	DOUBLE
	|	SIGNED
	|	UNSIGNED
	|	_BOOL
	|	_COMPLEX
	|	FLOATING_POINT
	|	INTEGER
	|	STRING
	|	ENUM
	|	VARIANT
	|	STRUCT
	|	CONST
	|	TYPEDEF
	|	EVENT
	|	STREAM
	|	TRACE
	;

/* 1.5 Constants */

c_char_sequence:
		c_char
	|	c_char_sequence c_char
	;

c_char:
		CHAR_STRING_TOKEN
	|	ESCSEQ
	;

/* 1.6 String literals */

s_char_sequence:
		s_char
	|	s_char_sequence s_char
	;

s_char:
		CHAR_STRING_TOKEN
	|	ESCSEQ
	;

/* 2: Phrase structure grammar */

postfix_expression:
		IDENTIFIER
	|	ID_TYPE
	|	keywords
	|	DECIMAL_CONSTANT
	|	OCTAL_CONSTANT
	|	HEXADECIMAL_CONSTANT
	|	STRING_LITERAL_START DQUOTE
	|	STRING_LITERAL_START s_char_sequence DQUOTE
	|	CHARACTER_CONSTANT_START c_char_sequence SQUOTE
	|	LPAREN unary_expression RPAREN
	|	postfix_expression LSBRAC unary_expression RSBRAC
	|	postfix_expression DOT IDENTIFIER
	|	postfix_expression DOT ID_TYPE
	|	postfix_expression RARROW IDENTIFIER
	|	postfix_expression RARROW ID_TYPE
	;

unary_expression:
		postfix_expression
	|	PLUS postfix_expression
	|	MINUS postfix_expression
	;

unary_expression_or_range:
		unary_expression DOTDOTDOT unary_expression
	|	unary_expression
	;

/* 2.2: Declarations */

declaration:
		declaration_specifiers SEMICOLON
	|	event_declaration
	|	stream_declaration
	|	trace_declaration
	|	declaration_specifiers TYPEDEF declaration_specifiers type_declarator_list SEMICOLON
	|	TYPEDEF declaration_specifiers type_declarator_list SEMICOLON
	|	declaration_specifiers TYPEDEF type_declarator_list SEMICOLON
	|	TYPEALIAS declaration_specifiers abstract_declarator_list COLON declaration_specifiers abstract_type_declarator_list SEMICOLON
	|	TYPEALIAS declaration_specifiers abstract_declarator_list COLON type_declarator_list SEMICOLON
	;

event_declaration:
		event_declaration_begin event_declaration_end
	|	event_declaration_begin ctf_assignment_expression_list event_declaration_end
	;

event_declaration_begin:
		EVENT LBRAC
		{
			push_scope(scanner);
		}
	;

event_declaration_end:
		RBRAC SEMICOLON
		{
			pop_scope(scanner);
		}
	;


stream_declaration:
		stream_declaration_begin stream_declaration_end
	|	stream_declaration_begin ctf_assignment_expression_list stream_declaration_end
	;

stream_declaration_begin:
		STREAM LBRAC
		{
			push_scope(scanner);
		}
	;

stream_declaration_end:
		RBRAC SEMICOLON
		{
			pop_scope(scanner);
		}
	;


trace_declaration:
		trace_declaration_begin trace_declaration_end
	|	trace_declaration_begin ctf_assignment_expression_list trace_declaration_end
	;

trace_declaration_begin:
		TRACE LBRAC
		{
			push_scope(scanner);
		}
	;

trace_declaration_end:
		RBRAC SEMICOLON
		{
			pop_scope(scanner);
		}
	;

declaration_specifiers:
		CONST
	|	type_specifier
	|	declaration_specifiers CONST
	|	declaration_specifiers type_specifier
	;

type_declarator_list:
		type_declarator
	|	type_declarator_list COMMA type_declarator
	;

abstract_type_declarator_list:
		abstract_type_declarator
	|	abstract_type_declarator_list COMMA abstract_type_declarator
	;

type_specifier:
		VOID
	|	CHAR
	|	SHORT
	|	INT
	|	LONG
	|	FLOAT
	|	DOUBLE
	|	SIGNED
	|	UNSIGNED
	|	_BOOL
	|	_COMPLEX
	|	ID_TYPE
	|	FLOATING_POINT LBRAC RBRAC
	|	FLOATING_POINT LBRAC ctf_assignment_expression_list RBRAC
	|	INTEGER LBRAC RBRAC
	|	INTEGER LBRAC ctf_assignment_expression_list RBRAC
	|	STRING LBRAC RBRAC
	|	STRING LBRAC ctf_assignment_expression_list RBRAC
	|	ENUM enum_type_specifier
	|	VARIANT variant_type_specifier
	|	STRUCT struct_type_specifier
	;

struct_type_specifier:
		struct_declaration_begin struct_or_variant_declaration_list struct_declaration_end
	|	IDENTIFIER struct_declaration_begin struct_or_variant_declaration_list struct_declaration_end
	|	ID_TYPE struct_declaration_begin struct_or_variant_declaration_list struct_declaration_end
	|	IDENTIFIER
	|	ID_TYPE
	;

struct_declaration_begin:
		LBRAC
		{
			push_scope(scanner);
		}
	;

struct_declaration_end:
		RBRAC
		{
			pop_scope(scanner);
		}
	;

variant_type_specifier:
		variant_declaration_begin struct_or_variant_declaration_list variant_declaration_end
	|	LT IDENTIFIER GT variant_declaration_begin struct_or_variant_declaration_list variant_declaration_end
	|	LT ID_TYPE GT variant_declaration_begin struct_or_variant_declaration_list variant_declaration_end
	|	IDENTIFIER variant_declaration_begin struct_or_variant_declaration_list variant_declaration_end
	|	IDENTIFIER LT IDENTIFIER GT variant_declaration_begin struct_or_variant_declaration_list variant_declaration_end
	|	IDENTIFIER LT IDENTIFIER GT
	|	IDENTIFIER LT ID_TYPE GT variant_declaration_begin struct_or_variant_declaration_list variant_declaration_end
	|	IDENTIFIER LT ID_TYPE GT
	|	ID_TYPE variant_declaration_begin struct_or_variant_declaration_list variant_declaration_end
	|	ID_TYPE LT IDENTIFIER GT variant_declaration_begin struct_or_variant_declaration_list variant_declaration_end
	|	ID_TYPE LT IDENTIFIER GT
	|	ID_TYPE LT ID_TYPE GT variant_declaration_begin struct_or_variant_declaration_list variant_declaration_end
	|	ID_TYPE LT ID_TYPE GT
	;

variant_declaration_begin:
		LBRAC
		{
			push_scope(scanner);
		}
	;

variant_declaration_end:
		RBRAC
		{
			pop_scope(scanner);
		}
	;

type_specifier_or_integer_constant:
		declaration_specifiers
	|	DECIMAL_CONSTANT
	|	OCTAL_CONSTANT
	|	HEXADECIMAL_CONSTANT
	;

enum_type_specifier:
		LBRAC enumerator_list RBRAC
	|	LT type_specifier_or_integer_constant GT LBRAC enumerator_list RBRAC
	|	IDENTIFIER LBRAC enumerator_list RBRAC
	|	IDENTIFIER LT type_specifier_or_integer_constant GT LBRAC enumerator_list RBRAC
	|	ID_TYPE LBRAC enumerator_list RBRAC
	|	ID_TYPE LT type_specifier_or_integer_constant GT LBRAC enumerator_list RBRAC
	|	LBRAC enumerator_list COMMA RBRAC
	|	LT type_specifier_or_integer_constant GT LBRAC enumerator_list COMMA RBRAC
	|	IDENTIFIER LBRAC enumerator_list COMMA RBRAC
	|	IDENTIFIER LT type_specifier_or_integer_constant GT LBRAC enumerator_list COMMA RBRAC
	|	IDENTIFIER
	|	IDENTIFIER LT type_specifier_or_integer_constant GT
	|	ID_TYPE LBRAC enumerator_list COMMA RBRAC
	|	ID_TYPE LT type_specifier_or_integer_constant GT LBRAC enumerator_list COMMA RBRAC
	|	ID_TYPE
	|	ID_TYPE LT type_specifier_or_integer_constant GT
	;

struct_or_variant_declaration_list:
		/* empty */
	|	struct_or_variant_declaration_list struct_or_variant_declaration
	;

struct_or_variant_declaration:
		specifier_qualifier_list struct_or_variant_declarator_list SEMICOLON
	|	specifier_qualifier_list TYPEDEF specifier_qualifier_list type_declarator_list SEMICOLON
	|	TYPEDEF specifier_qualifier_list type_declarator_list SEMICOLON
	|	specifier_qualifier_list TYPEDEF type_declarator_list SEMICOLON
	|	TYPEALIAS specifier_qualifier_list abstract_declarator_list COLON specifier_qualifier_list abstract_type_declarator_list SEMICOLON
	|	TYPEALIAS specifier_qualifier_list abstract_declarator_list COLON type_declarator_list SEMICOLON
	;

specifier_qualifier_list:
		CONST
	|	type_specifier
	|	specifier_qualifier_list CONST
	|	specifier_qualifier_list type_specifier
	;

struct_or_variant_declarator_list:
		struct_or_variant_declarator
	|	struct_or_variant_declarator_list COMMA struct_or_variant_declarator
	;

struct_or_variant_declarator:
		declarator
	|	COLON unary_expression
	|	declarator COLON unary_expression
	;

enumerator_list:
		enumerator
	|	enumerator_list COMMA enumerator
	;

enumerator:
		IDENTIFIER
	|	ID_TYPE
	|	keywords
	|	STRING_LITERAL_START DQUOTE
	|	STRING_LITERAL_START s_char_sequence DQUOTE
	|	IDENTIFIER EQUAL unary_expression_or_range
	|	ID_TYPE EQUAL unary_expression_or_range
	|	keywords EQUAL unary_expression_or_range
	|	STRING_LITERAL_START DQUOTE EQUAL unary_expression_or_range
	|	STRING_LITERAL_START s_char_sequence DQUOTE EQUAL unary_expression_or_range
	;

abstract_declarator_list:
		abstract_declarator
	|	abstract_declarator_list COMMA abstract_declarator
	;

abstract_declarator:
		direct_abstract_declarator
	|	pointer direct_abstract_declarator
	;

direct_abstract_declarator:
		/* empty */
	|	IDENTIFIER
	|	LPAREN abstract_declarator RPAREN
	|	direct_abstract_declarator LSBRAC type_specifier_or_integer_constant RSBRAC
	|	direct_abstract_declarator LSBRAC RSBRAC
	;

declarator:
		direct_declarator
	|	pointer direct_declarator
	;

direct_declarator:
		IDENTIFIER
	|	LPAREN declarator RPAREN
	|	direct_declarator LSBRAC type_specifier_or_integer_constant RSBRAC
	;

type_declarator:
		direct_type_declarator
	|	pointer direct_type_declarator
	;

direct_type_declarator:
		IDENTIFIER
		{
			add_type(scanner, $1->s);
		}
	|	LPAREN type_declarator RPAREN
	|	direct_type_declarator LSBRAC type_specifier_or_integer_constant RSBRAC
	;

abstract_type_declarator:
		direct_abstract_type_declarator
	|	pointer direct_abstract_type_declarator
	;

direct_abstract_type_declarator:
		/* empty */
	|	IDENTIFIER
		{
			add_type(scanner, $1->s);
		}
	|	LPAREN abstract_type_declarator RPAREN
	|	direct_abstract_type_declarator LSBRAC type_specifier_or_integer_constant RSBRAC
	|	direct_abstract_type_declarator LSBRAC RSBRAC
	;

pointer:	
		STAR
	|	STAR pointer
	|	STAR type_qualifier_list pointer
	;

type_qualifier_list:
		CONST
	|	type_qualifier_list CONST
	;

/* 2.3: CTF-specific declarations */

ctf_assignment_expression_list:
		ctf_assignment_expression SEMICOLON
	|	ctf_assignment_expression_list ctf_assignment_expression SEMICOLON
	;

ctf_assignment_expression:
		unary_expression EQUAL unary_expression
	|	unary_expression TYPEASSIGN type_specifier
	|	declaration_specifiers TYPEDEF declaration_specifiers type_declarator_list
	|	TYPEDEF declaration_specifiers type_declarator_list
	|	declaration_specifiers TYPEDEF type_declarator_list
	|	TYPEALIAS declaration_specifiers abstract_declarator_list COLON declaration_specifiers abstract_type_declarator_list
	|	TYPEALIAS declaration_specifiers abstract_declarator_list COLON type_declarator_list
	;
Commit	Line	Data
8b9d5b5e MD	1	%{
8b9d5b5e MD	2	/*
c59a87f5	3	* ctf-parser.y
8b9d5b5e MD	4	*
8b9d5b5e MD	5	* Common Trace Format Metadata Grammar.
c59a87f5 MD	6	*
	7	* Copyright 2010 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
	8	*
	9	* Permission is hereby granted, free of charge, to any person obtaining a copy
	10	* of this software and associated documentation files (the "Software"), to deal
	11	* in the Software without restriction, including without limitation the rights
	12	* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
	13	* copies of the Software, and to permit persons to whom the Software is
	14	* furnished to do so, subject to the following conditions:
	15	*
	16	* The above copyright notice and this permission notice shall be included in
	17	* all copies or substantial portions of the Software.
8b9d5b5e MD	18	*/
	19
	20	#include <stdio.h>
	21	#include <unistd.h>
	22	#include <string.h>
	23	#include <stdlib.h>
	24	#include <assert.h>
	25	#include <helpers/list.h>
	26	#include <glib.h>
34d3acc4	27	#include "ctf-scanner.h"
8b9d5b5e MD	28	#include "ctf-parser.h"
	29	#include "ctf-ast.h"
	30
	31	#define printf_dbg(fmt, args...) fprintf(stderr, "%s: " fmt, __func__, args)
	32	#define printf_dbg_noarg(fmt) fprintf(stderr, "%s: " fmt, __func__)
	33
34d3acc4 MD	34	int yyparse(struct ctf_scanner *scanner);
	35	int yylex(union YYSTYPE yyval, struct ctf_scanner scanner);
	36	int yylex_init_extra(struct ctf_scanner scanner, yyscan_t ptr_yy_globals);
	37	int yylex_destroy(yyscan_t yyscanner) ;
	38	void yyset_in(FILE * in_str, yyscan_t scanner);
8b9d5b5e	39
8b9d5b5e MD	40	int yydebug;
8b9d5b5e MD	41
8b9d5b5e MD	42	struct gc_string {
	43	struct cds_list_head gc;
	44	char s[];
	45	};
	46
8b9d5b5e MD	47	char strredup(char dest, const char src)
	48	{
	49	size_t len = strlen(src) + 1;
	50
	51	dest = realloc(dest, len);
	52	if (!*dest)
	53	return NULL;
	54	strcpy(*dest, src);
	55	return *dest;
	56	}
	57
34d3acc4	58	static struct gc_string gc_string_alloc(struct ctf_scanner scanner, size_t len)
8b9d5b5e MD	59	{
	60	struct gc_string *gstr;
	61
	62	gstr = malloc(sizeof(*gstr) + len);
34d3acc4	63	cds_list_add(&gstr->gc, &scanner->allocated_strings);
8b9d5b5e MD	64	return gstr;
	65	}
	66
34d3acc4	67	void setstring(struct ctf_scanner scanner, YYSTYPE lvalp, const char *src)
8b9d5b5e	68	{
34d3acc4 MD	69	lvalp->gs = gc_string_alloc(scanner, strlen(src) + 1);
34d3acc4 MD	70	strcpy(lvalp->gs->s, src);
8b9d5b5e MD	71	}
8b9d5b5e MD	72
609bd1bf MD	73	static void init_scope(struct ctf_scanner_scope *scope,
609bd1bf MD	74	struct ctf_scanner_scope *parent)
8b9d5b5e MD	75	{
	76	scope->parent = parent;
	77	scope->types = g_hash_table_new_full(g_str_hash, g_str_equal,
	78	(GDestroyNotify) free, NULL);
	79	}
	80
609bd1bf	81	static void finalize_scope(struct ctf_scanner_scope *scope)
8b9d5b5e MD	82	{
	83	g_hash_table_destroy(scope->types);
	84	}
	85
34d3acc4	86	static void push_scope(struct ctf_scanner *scanner)
8b9d5b5e	87	{
609bd1bf	88	struct ctf_scanner_scope *ns;
8b9d5b5e MD	89
8b9d5b5e MD	90	printf_dbg_noarg("push scope\n");
609bd1bf	91	ns = malloc(sizeof(struct ctf_scanner_scope));
34d3acc4 MD	92	init_scope(ns, scanner->cs);
34d3acc4 MD	93	scanner->cs = ns;
8b9d5b5e MD	94	}
8b9d5b5e MD	95
34d3acc4	96	static void pop_scope(struct ctf_scanner *scanner)
8b9d5b5e	97	{
609bd1bf	98	struct ctf_scanner_scope *os;
8b9d5b5e MD	99
8b9d5b5e MD	100	printf_dbg_noarg("pop scope\n");
34d3acc4 MD	101	os = scanner->cs;
34d3acc4 MD	102	scanner->cs = os->parent;
8b9d5b5e MD	103	finalize_scope(os);
	104	free(os);
	105	}
	106
609bd1bf	107	static int lookup_type(struct ctf_scanner_scope s, const char id)
8b9d5b5e MD	108	{
	109	int ret;
	110
	111	ret = (int) g_hash_table_lookup(s->types, id);
	112	printf_dbg("lookup %p %s %d\n", s, id, ret);
	113	return ret;
	114	}
	115
34d3acc4	116	int is_type(struct ctf_scanner scanner, const char id)
8b9d5b5e	117	{
609bd1bf	118	struct ctf_scanner_scope *it;
8b9d5b5e MD	119	int ret = 0;
8b9d5b5e MD	120
34d3acc4	121	for (it = scanner->cs; it != NULL; it = it->parent) {
8b9d5b5e MD	122	if (lookup_type(it, id)) {
	123	ret = 1;
	124	break;
	125	}
	126	}
	127	printf_dbg("is type %s %d\n", id, ret);
	128	return ret;
	129	}
	130
34d3acc4	131	static void add_type(struct ctf_scanner scanner, const char id)
8b9d5b5e MD	132	{
	133	char *type_id = NULL;
	134
	135	printf_dbg("add type %s\n", id);
34d3acc4	136	if (lookup_type(scanner->cs, id))
8b9d5b5e MD	137	return;
8b9d5b5e MD	138	strredup(&type_id, id);
34d3acc4	139	g_hash_table_insert(scanner->cs->types, type_id, type_id);
8b9d5b5e MD	140	}
8b9d5b5e MD	141
34d3acc4	142	void yyerror(struct ctf_scanner scanner, const char str)
8b9d5b5e MD	143	{
	144	fprintf(stderr, "error %s\n", str);
	145	}
	146
	147	int yywrap(void)
	148	{
	149	return 1;
	150	}
	151
34d3acc4	152	static void free_strings(struct cds_list_head *list)
8b9d5b5e MD	153	{
	154	struct gc_string gstr, tmp;
	155
34d3acc4	156	cds_list_for_each_entry_safe(gstr, tmp, list, gc)
8b9d5b5e MD	157	free(gstr);
	158	}
	159
34d3acc4	160	static struct ctf_ast *ctf_ast_alloc(void)
8b9d5b5e	161	{
34d3acc4 MD	162	struct ctf_ast *ast;
	163
	164	ast = malloc(sizeof(*ast));
	165	if (!ast)
	166	return NULL;
	167	memset(ast, 0, sizeof(*ast));
	168	return ast;
	169	}
	170
	171	static void ctf_ast_free(struct ctf_ast *ast)
	172	{
	173	}
	174
	175	int ctf_scanner_append_ast(struct ctf_scanner *scanner)
	176	{
	177	return yyparse(scanner);
	178	}
	179
	180	struct ctf_scanner ctf_scanner_alloc(FILE input)
	181	{
	182	struct ctf_scanner *scanner;
	183	int ret;
	184
	185	scanner = malloc(sizeof(*scanner));
	186	if (!scanner)
	187	return NULL;
	188	memset(scanner, 0, sizeof(*scanner));
	189
	190	ret = yylex_init_extra(scanner, &scanner->scanner);
	191	if (ret) {
	192	fprintf(stderr, "yylex_init error\n");
	193	goto cleanup_scanner;
	194	}
	195	yyset_in(input, scanner);
	196
	197	scanner->ast = ctf_ast_alloc();
	198	if (!scanner->ast)
	199	goto cleanup_lexer;
	200	init_scope(&scanner->root_scope, NULL);
	201	CDS_INIT_LIST_HEAD(&scanner->allocated_strings);
	202
	203	return scanner;
	204
	205	cleanup_lexer:
	206	ret = yylex_destroy(scanner->scanner);
	207	if (!ret)
	208	fprintf(stderr, "yylex_destroy error\n");
	209	cleanup_scanner:
	210	free(scanner);
	211	return NULL;
	212	}
	213
	214	void ctf_scanner_free(struct ctf_scanner *scanner)
	215	{
	216	int ret;
	217
	218	finalize_scope(&scanner->root_scope);
	219	free_strings(&scanner->allocated_strings);
	220	ctf_ast_free(scanner->ast);
	221	ret = yylex_destroy(scanner->scanner);
	222	if (ret)
	223	fprintf(stderr, "yylex_destroy error\n");
	224	free(scanner);
	225	}
8b9d5b5e MD	226
	227	%}
	228
34d3acc4 MD	229	%define api.pure
	230	/* %locations */
	231	%parse-param {struct ctf_scanner *scanner}
	232	%lex-param {struct ctf_scanner *scanner}
8b9d5b5e	233	%start file
8b9d5b5e MD	234	%token CHARACTER_CONSTANT_START SQUOTE STRING_LITERAL_START DQUOTE ESCSEQ CHAR_STRING_TOKEN LSBRAC RSBRAC LPAREN RPAREN LBRAC RBRAC RARROW STAR PLUS MINUS LT GT TYPEASSIGN COLON SEMICOLON DOTDOTDOT DOT EQUAL COMMA CONST CHAR DOUBLE ENUM EVENT FLOATING_POINT FLOAT INTEGER INT LONG SHORT SIGNED STREAM STRING STRUCT TRACE TYPEALIAS TYPEDEF UNSIGNED VARIANT VOID _BOOL _COMPLEX _IMAGINARY DECIMAL_CONSTANT OCTAL_CONSTANT HEXADECIMAL_CONSTANT
	235	%token <gs> IDENTIFIER ID_TYPE
	236	%token ERROR
	237	%union
	238	{
	239	long long ll;
	240	char c;
	241	struct gc_string *gs;
	242	struct ctf_node *n;
	243	}
	244
8b9d5b5e MD	245	%%
	246
	247	file:
	248	declaration
	249	\| file declaration
	250	;
	251
	252	keywords:
	253	VOID
	254	\| CHAR
	255	\| SHORT
	256	\| INT
	257	\| LONG
	258	\| FLOAT
	259	\| DOUBLE
	260	\| SIGNED
	261	\| UNSIGNED
	262	\| _BOOL
	263	\| _COMPLEX
	264	\| FLOATING_POINT
	265	\| INTEGER
	266	\| STRING
	267	\| ENUM
	268	\| VARIANT
	269	\| STRUCT
	270	\| CONST
	271	\| TYPEDEF
	272	\| EVENT
	273	\| STREAM
	274	\| TRACE
	275	;
	276
	277	/* 1.5 Constants */
	278
	279	c_char_sequence:
	280	c_char
	281	\| c_char_sequence c_char
	282	;
	283
	284	c_char:
	285	CHAR_STRING_TOKEN
	286	\| ESCSEQ
	287	;
	288
	289	/* 1.6 String literals */
	290
	291	s_char_sequence:
	292	s_char
	293	\| s_char_sequence s_char
	294	;
	295
	296	s_char:
	297	CHAR_STRING_TOKEN
	298	\| ESCSEQ
	299	;
	300
	301	/* 2: Phrase structure grammar */
	302
	303	postfix_expression:
	304	IDENTIFIER
	305	\| ID_TYPE
	306	\| keywords
	307	\| DECIMAL_CONSTANT
	308	\| OCTAL_CONSTANT
309	\| HEXADECIMAL_CONSTANT
310	\| STRING_LITERAL_START DQUOTE
311	\| STRING_LITERAL_START s_char_sequence DQUOTE
312	\| CHARACTER_CONSTANT_START c_char_sequence SQUOTE
313	\| LPAREN unary_expression RPAREN
314	\| postfix_expression LSBRAC unary_expression RSBRAC
315	\| postfix_expression DOT IDENTIFIER
316	\| postfix_expression DOT ID_TYPE
317	\| postfix_expression RARROW IDENTIFIER
318	\| postfix_expression RARROW ID_TYPE
319	;
320
321	unary_expression:
322	postfix_expression
323	\| PLUS postfix_expression
324	\| MINUS postfix_expression
325	;
326
327	unary_expression_or_range:
328	unary_expression DOTDOTDOT unary_expression
329	\| unary_expression
330	;
331
332	/* 2.2: Declarations */
333
334	declaration:
335	declaration_specifiers SEMICOLON
336	\| event_declaration
337	\| stream_declaration
338	\| trace_declaration
339	\| declaration_specifiers TYPEDEF declaration_specifiers type_declarator_list SEMICOLON
340	\| TYPEDEF declaration_specifiers type_declarator_list SEMICOLON
341	\| declaration_specifiers TYPEDEF type_declarator_list SEMICOLON
342	\| TYPEALIAS declaration_specifiers abstract_declarator_list COLON declaration_specifiers abstract_type_declarator_list SEMICOLON
343	\| TYPEALIAS declaration_specifiers abstract_declarator_list COLON type_declarator_list SEMICOLON
344	;
345
346	event_declaration:
347	event_declaration_begin event_declaration_end
348	\| event_declaration_begin ctf_assignment_expression_list event_declaration_end
349	;
350
351	event_declaration_begin:
352	EVENT LBRAC
353	{
34d3acc4	354	push_scope(scanner);
8b9d5b5e MD	355	}
	356	;
	357
	358	event_declaration_end:
	359	RBRAC SEMICOLON
	360	{
34d3acc4	361	pop_scope(scanner);
8b9d5b5e MD	362	}
	363	;
	364
	365
	366	stream_declaration:
	367	stream_declaration_begin stream_declaration_end
	368	\| stream_declaration_begin ctf_assignment_expression_list stream_declaration_end
	369	;
	370
	371	stream_declaration_begin:
	372	STREAM LBRAC
	373	{
34d3acc4	374	push_scope(scanner);
8b9d5b5e MD	375	}
	376	;
	377
	378	stream_declaration_end:
	379	RBRAC SEMICOLON
	380	{
34d3acc4	381	pop_scope(scanner);
8b9d5b5e MD	382	}
	383	;
	384
	385
	386	trace_declaration:
	387	trace_declaration_begin trace_declaration_end
	388	\| trace_declaration_begin ctf_assignment_expression_list trace_declaration_end
	389	;
	390
	391	trace_declaration_begin:
	392	TRACE LBRAC
	393	{
34d3acc4	394	push_scope(scanner);
8b9d5b5e MD	395	}
	396	;
	397
	398	trace_declaration_end:
	399	RBRAC SEMICOLON
	400	{
34d3acc4	401	pop_scope(scanner);
8b9d5b5e MD	402	}
	403	;
	404
	405	declaration_specifiers:
	406	CONST
	407	\| type_specifier
	408	\| declaration_specifiers CONST
	409	\| declaration_specifiers type_specifier
	410	;
	411
	412	type_declarator_list:
	413	type_declarator
	414	\| type_declarator_list COMMA type_declarator
	415	;
	416
	417	abstract_type_declarator_list:
	418	abstract_type_declarator
	419	\| abstract_type_declarator_list COMMA abstract_type_declarator
	420	;
	421
	422	type_specifier:
	423	VOID
	424	\| CHAR
	425	\| SHORT
	426	\| INT
	427	\| LONG
	428	\| FLOAT
	429	\| DOUBLE
	430	\| SIGNED
	431	\| UNSIGNED
	432	\| _BOOL
	433	\| _COMPLEX
	434	\| ID_TYPE
	435	\| FLOATING_POINT LBRAC RBRAC
	436	\| FLOATING_POINT LBRAC ctf_assignment_expression_list RBRAC
	437	\| INTEGER LBRAC RBRAC
	438	\| INTEGER LBRAC ctf_assignment_expression_list RBRAC
	439	\| STRING LBRAC RBRAC
	440	\| STRING LBRAC ctf_assignment_expression_list RBRAC
	441	\| ENUM enum_type_specifier
	442	\| VARIANT variant_type_specifier
	443	\| STRUCT struct_type_specifier
	444	;
	445
	446	struct_type_specifier:
	447	struct_declaration_begin struct_or_variant_declaration_list struct_declaration_end
	448	\| IDENTIFIER struct_declaration_begin struct_or_variant_declaration_list struct_declaration_end
	449	\| ID_TYPE struct_declaration_begin struct_or_variant_declaration_list struct_declaration_end
	450	\| IDENTIFIER
	451	\| ID_TYPE
	452	;
	453
	454	struct_declaration_begin:
	455	LBRAC
	456	{
34d3acc4	457	push_scope(scanner);
8b9d5b5e MD	458	}
	459	;
	460
	461	struct_declaration_end:
	462	RBRAC
	463	{
34d3acc4	464	pop_scope(scanner);
8b9d5b5e MD	465	}
	466	;
	467
	468	variant_type_specifier:
	469	variant_declaration_begin struct_or_variant_declaration_list variant_declaration_end
	470	\| LT IDENTIFIER GT variant_declaration_begin struct_or_variant_declaration_list variant_declaration_end
	471	\| LT ID_TYPE GT variant_declaration_begin struct_or_variant_declaration_list variant_declaration_end
	472	\| IDENTIFIER variant_declaration_begin struct_or_variant_declaration_list variant_declaration_end
	473	\| IDENTIFIER LT IDENTIFIER GT variant_declaration_begin struct_or_variant_declaration_list variant_declaration_end
	474	\| IDENTIFIER LT IDENTIFIER GT
	475	\| IDENTIFIER LT ID_TYPE GT variant_declaration_begin struct_or_variant_declaration_list variant_declaration_end
	476	\| IDENTIFIER LT ID_TYPE GT
	477	\| ID_TYPE variant_declaration_begin struct_or_variant_declaration_list variant_declaration_end
	478	\| ID_TYPE LT IDENTIFIER GT variant_declaration_begin struct_or_variant_declaration_list variant_declaration_end
	479	\| ID_TYPE LT IDENTIFIER GT
	480	\| ID_TYPE LT ID_TYPE GT variant_declaration_begin struct_or_variant_declaration_list variant_declaration_end
	481	\| ID_TYPE LT ID_TYPE GT
	482	;
	483
	484	variant_declaration_begin:
	485	LBRAC
	486	{
34d3acc4	487	push_scope(scanner);
8b9d5b5e MD	488	}
	489	;
	490
	491	variant_declaration_end:
	492	RBRAC
	493	{
34d3acc4	494	pop_scope(scanner);
8b9d5b5e MD	495	}
	496	;
	497
	498	type_specifier_or_integer_constant:
	499	declaration_specifiers
	500	\| DECIMAL_CONSTANT
	501	\| OCTAL_CONSTANT
	502	\| HEXADECIMAL_CONSTANT
	503	;
	504
	505	enum_type_specifier:
	506	LBRAC enumerator_list RBRAC
	507	\| LT type_specifier_or_integer_constant GT LBRAC enumerator_list RBRAC
	508	\| IDENTIFIER LBRAC enumerator_list RBRAC
	509	\| IDENTIFIER LT type_specifier_or_integer_constant GT LBRAC enumerator_list RBRAC
	510	\| ID_TYPE LBRAC enumerator_list RBRAC
	511	\| ID_TYPE LT type_specifier_or_integer_constant GT LBRAC enumerator_list RBRAC
	512	\| LBRAC enumerator_list COMMA RBRAC
	513	\| LT type_specifier_or_integer_constant GT LBRAC enumerator_list COMMA RBRAC
	514	\| IDENTIFIER LBRAC enumerator_list COMMA RBRAC
	515	\| IDENTIFIER LT type_specifier_or_integer_constant GT LBRAC enumerator_list COMMA RBRAC
	516	\| IDENTIFIER
	517	\| IDENTIFIER LT type_specifier_or_integer_constant GT
	518	\| ID_TYPE LBRAC enumerator_list COMMA RBRAC
	519	\| ID_TYPE LT type_specifier_or_integer_constant GT LBRAC enumerator_list COMMA RBRAC
	520	\| ID_TYPE
	521	\| ID_TYPE LT type_specifier_or_integer_constant GT
	522	;
	523
	524	struct_or_variant_declaration_list:
	525	/* empty */
	526	\| struct_or_variant_declaration_list struct_or_variant_declaration
	527	;
	528
	529	struct_or_variant_declaration:
	530	specifier_qualifier_list struct_or_variant_declarator_list SEMICOLON
	531	\| specifier_qualifier_list TYPEDEF specifier_qualifier_list type_declarator_list SEMICOLON
	532	\| TYPEDEF specifier_qualifier_list type_declarator_list SEMICOLON
	533	\| specifier_qualifier_list TYPEDEF type_declarator_list SEMICOLON
	534	\| TYPEALIAS specifier_qualifier_list abstract_declarator_list COLON specifier_qualifier_list abstract_type_declarator_list SEMICOLON
	535	\| TYPEALIAS specifier_qualifier_list abstract_declarator_list COLON type_declarator_list SEMICOLON
	536	;
	537
	538	specifier_qualifier_list:
	539	CONST
	540	\| type_specifier
	541	\| specifier_qualifier_list CONST
	542	\| specifier_qualifier_list type_specifier
	543	;
	544
	545	struct_or_variant_declarator_list:
	546	struct_or_variant_declarator
	547	\| struct_or_variant_declarator_list COMMA struct_or_variant_declarator
	548	;
	549
	550	struct_or_variant_declarator:
	551	declarator
	552	\| COLON unary_expression
	553	\| declarator COLON unary_expression
	554	;
	555
	556	enumerator_list:
	557	enumerator
	558	\| enumerator_list COMMA enumerator
559	;
560
561	enumerator:
562	IDENTIFIER
563	\| ID_TYPE
564	\| keywords
565	\| STRING_LITERAL_START DQUOTE
566	\| STRING_LITERAL_START s_char_sequence DQUOTE
567	\| IDENTIFIER EQUAL unary_expression_or_range
568	\| ID_TYPE EQUAL unary_expression_or_range
569	\| keywords EQUAL unary_expression_or_range
570	\| STRING_LITERAL_START DQUOTE EQUAL unary_expression_or_range
571	\| STRING_LITERAL_START s_char_sequence DQUOTE EQUAL unary_expression_or_range
572	;
573
574	abstract_declarator_list:
575	abstract_declarator
576	\| abstract_declarator_list COMMA abstract_declarator
577	;
578
579	abstract_declarator:
580	direct_abstract_declarator
581	\| pointer direct_abstract_declarator
582	;
583
584	direct_abstract_declarator:
585	/* empty */
586	\| IDENTIFIER
587	\| LPAREN abstract_declarator RPAREN
588	\| direct_abstract_declarator LSBRAC type_specifier_or_integer_constant RSBRAC
589	\| direct_abstract_declarator LSBRAC RSBRAC
590	;
591
592	declarator:
593	direct_declarator
594	\| pointer direct_declarator
595	;
596
597	direct_declarator:
598	IDENTIFIER
599	\| LPAREN declarator RPAREN
600	\| direct_declarator LSBRAC type_specifier_or_integer_constant RSBRAC
601	;
602
603	type_declarator:
604	direct_type_declarator
605	\| pointer direct_type_declarator
606	;
607
608	direct_type_declarator:
609	IDENTIFIER
610	{
34d3acc4	611	add_type(scanner, $1->s);
8b9d5b5e MD	612	}
	613	\| LPAREN type_declarator RPAREN
	614	\| direct_type_declarator LSBRAC type_specifier_or_integer_constant RSBRAC
	615	;
	616
	617	abstract_type_declarator:
	618	direct_abstract_type_declarator
	619	\| pointer direct_abstract_type_declarator
	620	;
	621
	622	direct_abstract_type_declarator:
	623	/* empty */
	624	\| IDENTIFIER
	625	{
34d3acc4	626	add_type(scanner, $1->s);
8b9d5b5e MD	627	}
	628	\| LPAREN abstract_type_declarator RPAREN
	629	\| direct_abstract_type_declarator LSBRAC type_specifier_or_integer_constant RSBRAC
	630	\| direct_abstract_type_declarator LSBRAC RSBRAC
	631	;
	632
	633	pointer:
	634	STAR
	635	\| STAR pointer
	636	\| STAR type_qualifier_list pointer
	637	;
	638
	639	type_qualifier_list:
	640	CONST
	641	\| type_qualifier_list CONST
	642	;
	643
	644	/* 2.3: CTF-specific declarations */
	645
	646	ctf_assignment_expression_list:
	647	ctf_assignment_expression SEMICOLON
	648	\| ctf_assignment_expression_list ctf_assignment_expression SEMICOLON
	649	;
	650
	651	ctf_assignment_expression:
	652	unary_expression EQUAL unary_expression
	653	\| unary_expression TYPEASSIGN type_specifier
	654	\| declaration_specifiers TYPEDEF declaration_specifiers type_declarator_list
	655	\| TYPEDEF declaration_specifiers type_declarator_list
	656	\| declaration_specifiers TYPEDEF type_declarator_list
	657	\| TYPEALIAS declaration_specifiers abstract_declarator_list COLON declaration_specifiers abstract_type_declarator_list
	658	\| TYPEALIAS declaration_specifiers abstract_declarator_list COLON type_declarator_list
	659	;