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/*
* Copyright � 2006-2016 SplinterGU (Fenix/Bennugd)
* Copyright � 2002-2006 Fenix Team (Fenix)
* Copyright � 1999-2002 Jos� Luis Cebri�n Pag�e (Fenix)
*
* This file is part of Bennu - Game Development
*
* This software is provided 'as-is', without any express or implied
* warranty. In no event will the authors be held liable for any damages
* arising from the use of this software.
*
* Permission is granted to anyone to use this software for any purpose,
* including commercial applications, and to alter it and redistribute it
* freely, subject to the following restrictions:
*
* 1. The origin of this software must not be misrepresented; you must not
* claim that you wrote the original software. If you use this software
* in a product, an acknowledgment in the product documentation would be
* appreciated but is not required.
*
* 2. Altered source versions must be plainly marked as such, and must not be
* misrepresented as being the original software.
*
* 3. This notice may not be removed or altered from any source
* distribution.
*
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "bgdc.h"
/* ---------------------------------------------------------------------- */
/* Este m�dulo contiene funciones de utilidad para crear e ir rellenando */
/* varspaces (tablas con identificador, offset y tipo de cada VARIABLE) */
/* y segmentos de datos */
/* ---------------------------------------------------------------------- */
VARSPACE global, local ;
/*
* FUNCTION : varspace_dump
*
* Dumps descriptively the variables of a given varspace to the
* standard output. Recursively describes struct types.
*
* PARAMS :
* n Pointer to the varspace
* indent Left indentation in chars (internal; use 0)
*
* RETURN VALUE :
* None
*/
void varspace_dump( VARSPACE * n, int indent )
{
int i, t, to ;
char buffer[128] ;
for ( i = 0 ; i < n->count ; i++ )
{
if ( i < n->count - 1 )
to = n->vars[i+1].offset - 1 ;
else
to = n->last_offset - 1 ;
printf( "[%04d:%04d]\t", n->vars[i].offset, to ) ;
for ( t = 0 ; t < indent ; t++ ) printf( " + " ) ;
typedef_describe( buffer, n->vars[i].type ) ;
printf( "%s %s", buffer, identifier_name( n->vars[i].code ) ) ;
/* Describe arrays of structs */
if ( typedef_is_array( n->vars[i].type ) )
{
TYPEDEF r = typedef_reduce( n->vars[i].type );
while ( typedef_is_array( r ) )
r = typedef_reduce( r );
if ( typedef_is_struct( r ) )
{
printf( ":\n" ) ;
varspace_dump( typedef_members( r ), indent + 1 ) ;
}
else
printf( "\n" );
}
/* Describe structs */
else if ( typedef_is_struct( n->vars[i].type ) )
{
printf( ":\n" ) ;
varspace_dump( typedef_members( n->vars[i].type ), indent + 1 ) ;
}
else printf( "\n" ) ;
}
}
/*
* FUNCTION : varspace_new
*
* Create a new varspace in dynamic memory, and initialize
* it using varspace_init
*
* PARAMS :
* None
*
* RETURN VALUE :
* Pointer to the new varspace
*/
VARSPACE * varspace_new()
{
VARSPACE * v = ( VARSPACE * ) calloc( 1, sizeof( VARSPACE ) ) ;
if ( !v ) compile_error( "varspace_new: out of memory\n" ) ;
varspace_init( v ) ;
return v ;
}
/*
* FUNCTION : varspace_destroy
*
* Destroy a dynamic varspace created with varspace_new
*
* PARAMS :
* v Pointer to the varspace
*
* RETURN VALUE :
* None
*/
void varspace_destroy( VARSPACE * v )
{
free( v->vars ) ;
free( v ) ;
}
/*
* FUNCTION : varspace_init
*
* Initialize all members of a varspace. Use this function
* to initialize a varspace that is created in local
* memory instead of a dynamic one created with varspace_new.
*
* PARAMS :
* n Pointer to the not-initialized varspace
*
* RETURN VALUE :
* None
*/
void varspace_init( VARSPACE * n )
{
n->vars = ( VARIABLE * ) calloc( 16, sizeof( VARIABLE ) ) ;
n->reserved = 16 ;
n->count = 0 ;
n->size = 0 ;
n->stringvars = 0 ;
n->stringvar_reserved = 0 ;
n->stringvar_count = 0 ;
if ( !n->vars ) compile_error( "varspace_init: out of memory\n" ) ;
}
/*
* FUNCTION : varspace_varstring
*
* Add a new string offset to the varspace. A varspace has
* a count of every string variable it contains, but this
* list is not updated automatically. You should mark
* every string you create using this function.
*
* PARAMS :
* n Pointer to the varspace
* offset Offset of the new string
*
* RETURN VALUE :
* None
*/
void varspace_varstring( VARSPACE * n, int offset )
{
if ( n->stringvar_reserved == n->stringvar_count )
{
n->stringvars = ( int * ) realloc( n->stringvars, ( n->stringvar_reserved += 16 ) * sizeof( int ) ) ;
if ( !n->stringvars ) compile_error( "varspace_varstring: out of memory\n" ) ;
}
n->stringvars[n->stringvar_count++] = offset ;
}
/*
* FUNCTION : varspace_alloc
*
* Allocate space for new variables in the varspace. This
* is an internal function. Use varspace_add instead.
*
* PARAMS :
* n Pointer to the varspace
* count Number of new variables of space to reserve
*
* RETURN VALUE :
* None
*/
void varspace_alloc( VARSPACE * n, int count )
{
n->vars = ( VARIABLE * ) realloc( n->vars, sizeof( VARIABLE ) * ( n->reserved += count ) ) ;
if ( !n->vars ) compile_error( "varspace_alloc: out of memory\n" ) ;
}
/*
* FUNCTION : varspace_add
*
* Add a new variable to a given varspace. This function does not
* mark string variables. You should use varspace_varstring after
* adding new strings to a varspace.
*
* PARAMS :
* n Pointer to the varspace
* v Variable to add
*
* RETURN VALUE :
* None
*/
void varspace_add( VARSPACE * n, VARIABLE v )
{
if ( n->count == n->reserved ) varspace_alloc( n, 16 ) ;
n->vars[n->count++] = v ;
n->size += typedef_size( v.type ) ;
}
/*
* FUNCTION : varspace_search
*
* Search a variable in a varspace by its identifier.
*
* PARAMS :
* n Pointer to the varspace
* code Identifier of the variable
*
* RETURN VALUE :
* Pointer to the variable found or NULL if none
*/
VARIABLE * varspace_search( VARSPACE * n, int code )
{
int i ;
for ( i = 0 ; i < n->count ; i++ )
if ( n->vars[i].code == code ) return &n->vars[i] ;
return 0 ;
}
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