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Diffstat (limited to 'core/bgdc/src/varspace.c')
| -rw-r--r-- | core/bgdc/src/varspace.c | 256 |
1 files changed, 256 insertions, 0 deletions
diff --git a/core/bgdc/src/varspace.c b/core/bgdc/src/varspace.c new file mode 100644 index 0000000..51ad1bc --- /dev/null +++ b/core/bgdc/src/varspace.c @@ -0,0 +1,256 @@ +/* + * Copyright © 2006-2016 SplinterGU (Fenix/Bennugd) + * Copyright © 2002-2006 Fenix Team (Fenix) + * Copyright © 1999-2002 José Luis Cebrián Pagüe (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 módulo 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 ; +} |