+/* $Id$ */
+
+/* ddt_new - creation/deletion of datatypes structs (private to this module)*/
+
+/* Authors: Olivier Aumage, Martin Quinson */
+/* Copyright (C) 2003, 2004 the 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"
+
+GRAS_LOG_NEW_DEFAULT_SUBCATEGORY(new,DataDesc);
+
+static gras_error_t
+gras_ddt_new(const char *name,
+ gras_datadesc_type_t **dst) {
+
+ gras_datadesc_type_t *res=malloc(sizeof(gras_datadesc_type_t));
+ if (!res)
+ RAISE_MALLOC;
+
+ memset(res, 0, sizeof(res));
+ res->name = strdup(name);
+
+ *dst=res;
+ return no_error;
+}
+
+/**
+ * gras_ddt_new_scalar:
+ *
+ * Create a new scalar and give a pointer to it
+ */
+gras_error_t
+gras_ddt_new_scalar(const char *name,
+ long int size,
+ enum e_gras_dd_scalar_encoding encoding,
+ gras_datadesc_type_cb_void_t cb,
+ gras_datadesc_type_t **dst) {
+
+ gras_error_t errcode;
+ gras_datadesc_type_t *res;
+
+ TRY(gras_ddt_new(name,dst));
+ res=*dst;
+
+ res->size = size>0 ? size : 0;
+
+ if (size>0) { /* Black magic from Oli FIXME: documentation ;)*/
+ long int sz = size;
+ long int mask = sz;
+
+ while ((sz >>= 1)) {
+ mask |= sz;
+ }
+
+ if (size & (mask >> 1)) {
+ res->alignment = (size & ~(mask >> 1)) << 1;
+ gras_assert0(res->alignment != 0,
+ "scalar type too large");
+
+ res->aligned_size = aligned(size, res->alignment);
+ gras_assert0 (res->aligned_size >= 0,
+ "scalar type too large");
+
+ } else {
+ res->alignment = size & ~(mask >> 1);;
+ res->aligned_size = aligned(size, res->alignment);
+ }
+
+ } else {
+ res->alignment = 0;
+ res->aligned_size = 0;
+ }
+
+ res->category_code = e_gras_datadesc_type_cat_scalar;
+ res->category.scalar_data.encoding = encoding;
+
+ res->pre = cb;
+ return no_error;
+}
+
+
+/**
+ * gras_dd_cat_field_free:
+ *
+ * Frees one struct or union field
+ */
+void gras_dd_cat_field_free(void *f) {
+ gras_dd_cat_field_t *field = (gras_dd_cat_field_t *)f;
+ if (field) {
+ if (field->name)
+ free(field->name);
+ free(field);
+ }
+}
+
+/**
+ * gras_ddt_new_struct:
+ *
+ * Create a new struct and give a pointer to it
+ */
+gras_error_t
+gras_ddt_new_struct(const char *name,
+ gras_datadesc_type_cb_void_t pre,
+ gras_datadesc_type_cb_void_t post,
+ gras_datadesc_type_t **dst) {
+
+ gras_error_t errcode;
+ gras_datadesc_type_t *res;
+
+ TRY(gras_ddt_new(name,dst));
+ res=*dst;
+
+ res->size = 0;
+ res->alignment = 0;
+ res->aligned_size = 0;
+ res->category_code = e_gras_datadesc_type_cat_struct;
+ TRY(gras_dynar_new(&(res->category.struct_data.fields),
+ sizeof(gras_dd_cat_field_t*),
+ &gras_dd_cat_field_free));
+ res->pre = pre;
+ res->post = post;
+
+ return no_error;
+}
+
+/**
+ * gras_ddt_new_struct_append:
+ *
+ * Append a field to the struct
+ */
+gras_error_t
+gras_ddt_new_struct_append(gras_datadesc_type_t *struct_type,
+ const char *name,
+ gras_datadesc_type_t *field_type,
+ gras_datadesc_type_cb_void_t pre,
+ gras_datadesc_type_cb_void_t post) {
+
+ gras_error_t errcode;
+ gras_dd_cat_field_t *field;
+
+ gras_assert0(field_type->size >= 0,
+ "Cannot add a dynamically sized field in a structure");
+
+ field=malloc(sizeof(gras_dd_cat_field_t));
+ if (!field)
+ RAISE_MALLOC;
+
+ field->name = strdup(name);
+ field->offset = aligned(struct_type->size, field_type->alignment);
+ field->code = field_type->code;
+ field->pre = pre;
+ field->post = post;
+
+ TRY(gras_dynar_push(struct_type->category.struct_data.fields, field));
+
+ struct_type->size = field->offset + field_type->size;
+ struct_type->alignment = max(struct_type->alignment, field_type->alignment);
+ struct_type->aligned_size = aligned(struct_type->size, struct_type->alignment);
+
+ return no_error;
+}
+
+/**
+ * gras_ddt_new_union:
+ *
+ * Create a new union and give a pointer to it
+ */
+gras_error_t
+gras_ddt_new_union(const char *name,
+ gras_datadesc_type_cb_int_t field_count,
+ gras_datadesc_type_cb_void_t post,
+ gras_datadesc_type_t **dst) {
+
+ gras_error_t errcode;
+ gras_datadesc_type_t *res;
+
+ gras_assert0(field_count,
+ "Attempt to creat an union without field_count function");
+
+ TRY(gras_ddt_new(name,dst));
+ res=*dst;
+
+ res->size = 0;
+ res->alignment = 0;
+ res->aligned_size = 0;
+ res->category_code = e_gras_datadesc_type_cat_union;
+ TRY(gras_dynar_new(&(res->category.union_data.fields),
+ sizeof(gras_dd_cat_field_t*),
+ &gras_dd_cat_field_free));
+ res->category.union_data.field_count = field_count;
+ res->pre = NULL;
+ res->post = post;
+
+ return no_error;
+}
+
+/**
+ * gras_ddt_new_union_append:
+ *
+ * Append a field to the union
+ */
+gras_error_t
+gras_ddt_new_union_append(gras_datadesc_type_t *union_type,
+ const char *name,
+ gras_datadesc_type_t *field_type,
+ gras_datadesc_type_cb_void_t pre,
+ gras_datadesc_type_cb_void_t post) {
+
+ gras_error_t errcode;
+ gras_dd_cat_field_t *field;
+
+ gras_assert0(field_type->size >= 0,
+ "Cannot add a dynamically sized field in an union");
+
+ field=malloc(sizeof(gras_dd_cat_field_t));
+ if (!field)
+ RAISE_MALLOC;
+
+ field->name = strdup(name);
+ field->offset = 0; /* that's the purpose of union ;) */
+ field->code = field_type->code;
+ field->pre = pre;
+ field->post = post;
+
+ TRY(gras_dynar_push(union_type->category.union_data.fields, field));
+
+ union_type->size = max(union_type->size, field_type->size);
+ union_type->alignment = max(union_type->alignment, field_type->alignment);
+ union_type->aligned_size = aligned(union_type->size, union_type->alignment);
+
+ return no_error;
+}
+
+/**
+ * gras_ddt_new_ref:
+ *
+ * Create a new ref and give a pointer to it
+ */
+gras_error_t
+gras_ddt_new_ref(const char *name,
+ gras_datadesc_type_t *referenced_type,
+ gras_datadesc_type_cb_int_t discriminant,
+ gras_datadesc_type_cb_void_t post,
+ gras_datadesc_type_t **dst) {
+
+ gras_error_t errcode;
+ gras_datadesc_type_t *res;
+
+ gras_assert0(discriminant || referenced_type,
+ "Attempt to create a generic reference without discriminant");
+
+ TRY(gras_ddt_new(name,dst));
+ res=*dst;
+
+ /* FIXME: Size from bootstraping */
+ res->size = 0;
+ res->alignment = 0;
+ res->aligned_size = 0;
+ res->category_code = e_gras_datadesc_type_cat_ref;
+
+ res->category.ref_data.code = referenced_type ? referenced_type->code : -1;
+ res->category.ref_data.discriminant = discriminant;
+ res->pre = NULL;
+ res->post = post;
+
+ return no_error;
+}
+
+/**
+ * gras_ddt_new_array:
+ *
+ * Create a new array and give a pointer to it
+ */
+gras_error_t
+gras_ddt_new_array(const char *name,
+ gras_datadesc_type_t *element_type,
+ long int fixed_size,
+ gras_datadesc_type_cb_int_t dynamic_size,
+ gras_datadesc_type_cb_void_t post,
+ gras_datadesc_type_t **dst) {
+
+ gras_error_t errcode;
+ gras_datadesc_type_t *res;
+
+ gras_assert0(dynamic_size || fixed_size>0,
+ "Attempt to create a dynamic array without size discriminant");
+
+ TRY(gras_ddt_new(name,dst));
+ res=*dst;
+
+ if (fixed_size <= 0) {
+ res->size = fixed_size;
+ } else {
+ res->size = fixed_size * element_type->aligned_size;
+ }
+ res->alignment = element_type->alignment;
+ res->aligned_size = fixed_size; /*FIXME: That was so in GS, but looks stupid*/
+ res->category_code = e_gras_datadesc_type_cat_array;
+
+ res->category.array_data.code = element_type->code;
+ res->category.array_data.fixed_size = fixed_size;
+ res->category.array_data.dynamic_size = dynamic_size;
+
+ res->pre = NULL;
+ res->post = post;
+
+ return no_error;
+}
+
+/**
+ * gras_ddt_new_ignored:
+ *
+ * Create a new ignored field and give a pointer to it.
+ *
+ * If you give a default value, it will be copied away so that you can free your copy.
+ */
+gras_error_t
+gras_ddt_new_ignored(const char *name,
+ void *default_value,
+ void_f_pvoid_t *free_func,
+ long int size,
+ long int alignment,
+ gras_datadesc_type_cb_void_t post,
+ gras_datadesc_type_t **dst) {
+ gras_error_t errcode;
+ gras_datadesc_type_t *res;
+
+ TRY(gras_ddt_new(name,dst));
+ res=*dst;
+
+ res->size = size > 0?size:0;
+ res->alignment = alignment;
+
+ if (size > 0) {
+ res->aligned_size = aligned(size, alignment);
+ } else {
+ res->aligned_size = 0;
+ }
+
+ if (default_value && res->size) {
+ res->category.ignored_data.default_value = malloc((size_t)size);
+ if (! (res->category.ignored_data.default_value) )
+ RAISE_MALLOC;
+ memcpy(res->category.ignored_data.default_value,
+ default_value, (size_t)size);
+ }
+
+ res->category_code = e_gras_datadesc_type_cat_ignored;
+ res->category.ignored_data.free_func = free_func;
+
+ res->post = post;
+
+
+ res->size = size;
+
+ return no_error;
+}
+
+/**
+ * gras_ddt_free:
+ *
+ * Frees a datadescription.
+ */
+void gras_ddt_free(gras_datadesc_type_t **type) {
+ gras_datadesc_type_t *t;
+
+ if (type && *type) {
+ t=*type;
+
+ free(t->name);
+ switch (t->category_code) {
+ case e_gras_datadesc_type_cat_scalar:
+ case e_gras_datadesc_type_cat_ref:
+ case e_gras_datadesc_type_cat_array:
+ /* nothing to free in there */
+ break;
+
+ case e_gras_datadesc_type_cat_ignored:
+ if (t->category.ignored_data.free_func) {
+ t->category.ignored_data.free_func(t->category.ignored_data.default_value);
+ }
+ break;
+
+ case e_gras_datadesc_type_cat_struct:
+ gras_dynar_free(t->category.struct_data.fields);
+ break;
+
+ case e_gras_datadesc_type_cat_union:
+ gras_dynar_free(t->category.union_data.fields);
+ break;
+
+ default:
+ /* datadesc was invalid. Killing it is like euthanasy, I guess */
+ break;
+ }
+ }
+}
