+++ /dev/null
-/* $Id$ */
-
-/* cbps - persistant states for callbacks */
-
-/* Authors: Olivier Aumage, Martin Quinson */
-/* Copyright (C) 2003, 2004 da GRAS posse. */
-
-/* This program is free software; you can redistribute it and/or modify it
- under the terms of the license (GNU LGPL) which comes with this package. */
-
-#include "DataDesc/datadesc_private.h"
-
-typedef struct {
- gras_datadesc_type_t *type;
- void *data;
-} gras_dd_cbps_elm_t;
-
-struct s_gras_dd_cbps {
- gras_dict_t *space;
- gras_dynar_t *stack;
- gras_dynar_t *globals;
-};
-
-gras_error_t
-gras_dd_cbps_new(gras_dd_cbps_t **dst) {
- gras_error_t errcode;
- gras_dd_cbps_t *res;
-
- if (!(res=malloc(sizeof(gras_dd_cbps_t))))
- RAISE_MALLOC;
-
- TRY(gras_dict_new(&(res->space)));
- /* FIXME:leaking on content of dynars*/
- TRY(gras_dynar_new(&(res->stack), sizeof(gras_dynar_t*), NULL));
- TRY(gras_dynar_new(&(res->globals), sizeof(char*), NULL));
-
- *dst = res;
- return no_error;
-}
-
-void
-gras_dd_cbps_free(gras_dd_cbps_t **state) {
-
- gras_dict_free ( &( (*state)->space ) );
- gras_dynar_free( (*state)->stack );
- gras_dynar_free( (*state)->globals );
-
- free(*state);
- *state = NULL;
-}
-
-/**
- * gras_dd_cbps_push:
- *
- * Declare a new element in the PS, and give it a value. If an element of that
- * name already exists, it is masked by the one given here, and will be
- * seeable again only after a pop to remove the value this push adds.
- */
-void
-gras_dd_cbps_push(gras_dd_cbps_t *ps,
- const char *name,
- void *data,
- gras_datadesc_type_t *ddt) {
-
- gras_dynar_t *p_dynar = NULL;
- gras_dd_cbps_elm_t *p_var = NULL;
-
- gras_dict_get(ps->space, name, (void **)&p_dynar);
-
- if (!p_dynar) {
- gras_dynar_new(&p_dynar, sizeof (gras_dd_cbps_elm_t *), NULL);
- gras_dict_set(ps->space, name, (void **)p_dynar, NULL);
- /* FIXME: leaking on dynar. Insert in dict with a way to free it */
- }
-
- p_var = calloc(1, sizeof(gras_dd_cbps_elm_t));
- p_var->type = ddt;
- p_var->data = data;
-
- gras_dynar_push(p_dynar, &p_var);
-
- gras_dynar_pop(ps->stack, &p_dynar);
- gras_dynar_push(p_dynar, &name);
- gras_dynar_push(ps->stack, &p_dynar);
-}
-
-/**
- * gras_dd_cbps_pop:
- *
- * Retrieve an element from the PS, and remove it from the PS. If it's not
- * present in the current block, it will fail (with abort) and not search
- * in upper blocks since this denotes a programmation error.
- */
-void *
-gras_dd_cbps_pop (gras_dd_cbps_t *ps,
- const char *name,
- gras_datadesc_type_t **ddt) {
- gras_dynar_t *p_dynar = NULL;
- gras_dd_cbps_elm_t *p_elm = NULL;
- void *data = NULL;
-
- /* FIXME: Error handling */
- gras_dict_get(ps->space, name, (void **)&p_dynar);
- gras_dynar_pop(p_dynar, &p_elm);
-
- if (!gras_dynar_length(p_dynar)) {
- gras_dict_remove(ps->space, name);
- gras_dynar_free_container(p_dynar);
- }
-
- if (ddt) {
- *ddt = p_elm->type;
- }
-
- data = p_elm->data;
-
- free(p_elm);
-
- gras_dynar_pop(ps->stack, &p_dynar);
- {
- int l = gras_dynar_length(p_dynar);
-
- while (l--) {
- char *_name = NULL;
-
- gras_dynar_get(p_dynar, l, &_name);
- if (!strcmp(name, _name)) {
- gras_dynar_remove_at(p_dynar, l, &_name);
- free(_name);
- break;
- }
- }
- }
- gras_dynar_push(ps->stack, &p_dynar);
-
-
- return data;
-}
-
-/**
- * gras_dd_cbps_set:
- *
- * Change the value of an element in the PS.
- * If it's not present in the current block, look in the upper ones.
- * If it's not present in any of them, look in the globals
- * (FIXME: which no function of this API allows to set).
- * If not present there neither, the code may segfault (Oli?).
- *
- * Once a reference to an element of that name is found somewhere in the PS,
- * its value is changed.
- */
-void
-gras_dd_cbps_set (gras_dd_cbps_t *ps,
- const char *name,
- void *data,
- gras_datadesc_type_t *ddt) {
-
- gras_dynar_t *p_dynar = NULL;
- gras_dd_cbps_elm_t *p_elm = NULL;
-
- gras_dict_get(ps->space, name, (void **)&p_dynar);
-
- if (!p_dynar) {
- gras_dynar_new(&p_dynar, sizeof (gras_dd_cbps_elm_t *), NULL);
- gras_dict_set(ps->space, name, (void **)p_dynar, NULL);
-
- p_elm = calloc(1, sizeof(gras_dd_cbps_elm_t));
- gras_dynar_push(ps->globals, &name);
- } else {
- gras_dynar_pop(p_dynar, &p_elm);
- }
-
- p_elm->type = ddt;
- p_elm->data = data;
-
- gras_dynar_push(p_dynar, &p_elm);
-
-}
-
-/**
- * gras_dd_cbps_get:
- *
- * Get the value of an element in the PS without modifying it.
- * (note that you get the content of the data struct and not a copy to it)
- * If it's not present in the current block, look in the upper ones.
- * If it's not present in any of them, look in the globals
- * (FIXME: which no function of this API allows to set).
- * If not present there neither, the code may segfault (Oli?).
- */
-void *
-gras_dd_cbps_get (gras_dd_cbps_t *ps,
- const char *name,
- gras_datadesc_type_t **ddt) {
-
- gras_dynar_t *p_dynar = NULL;
- gras_dd_cbps_elm_t *p_elm = NULL;
-
- /* FIXME: Error handling */
- gras_dict_get(ps->space, name, (void **)&p_dynar);
- gras_dynar_pop(p_dynar, &p_elm);
- gras_dynar_push(p_dynar, &p_elm);
-
- if (ddt) {
- *ddt = p_elm->type;
- }
-
- return p_elm->data;
-
-}
-
-/**
- * gras_dd_cbps_block_begin:
- *
- * Begins a new block.
- *
- * Blocks are usefull to remove a whole set of declarations you don't even know
- *
- * E.g., they constitute an elegent solution to recursive data structures.
- *
- * push/pop may be used in some cases for that, but if your recursive data
- * struct contains other structs needing themselves callbacks, you have to
- * use block_{begin,end} to do the trick.
- */
-
-void
-gras_dd_cbps_block_begin(gras_dd_cbps_t *ps) {
-
- gras_dynar_t *p_dynar = NULL;
-
- gras_dynar_new(&p_dynar, sizeof (char *), NULL);
- gras_dynar_push(ps->stack, &p_dynar);
-}
-
-/**
- * gras_dd_cbps_block_begin:
- *
- * End the current block, and go back to the upper one.
- */
-void
-gras_dd_cbps_block_end(gras_dd_cbps_t *ps) {
-
- gras_dynar_t *p_dynar = NULL;
- int cursor = 0;
- char *name = NULL;
-
- gras_dynar_pop(ps->stack, &p_dynar);
-
- gras_dynar_foreach(p_dynar, cursor, name) {
-
- gras_dynar_t *p_dynar_elm = NULL;
- gras_dd_cbps_elm_t *p_elm = NULL;
-
- gras_dict_get(ps->space, name, (void **)&p_dynar_elm);
- gras_dynar_pop(p_dynar_elm, &p_elm);
-
- if (!gras_dynar_length(p_dynar_elm)) {
- gras_dict_remove(ps->space, name);
- gras_dynar_free_container(p_dynar_elm);
- }
-
- free(p_elm);
- free(name);
- }
-
- gras_dynar_free_container(p_dynar);
-}
-
-
-
