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parse.c
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parse.c
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/*
* Copyright 2011 Leiden University. All rights reserved.
* Copyright 2013-2014 Ecole Normale Superieure. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials provided
* with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY LEIDEN UNIVERSITY ''AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL LEIDEN UNIVERSITY OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
* OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* The views and conclusions contained in the software and documentation
* are those of the authors and should not be interpreted as
* representing official policies, either expressed or implied, of
* Leiden University.
*/
#include <stdlib.h>
#include <yaml.h>
#include <isl/ctx.h>
#include <isl/id.h>
#include <isl/val.h>
#include <isl/aff.h>
#include <isl/set.h>
#include <isl/map.h>
#include <isl/union_set.h>
#include <isl/union_map.h>
#include "expr.h"
#include "loc.h"
#include "scop.h"
#include "scop_yaml.h"
#include "tree.h"
static char *extract_string(isl_ctx *ctx, yaml_document_t *document,
yaml_node_t *node)
{
if (node->type != YAML_SCALAR_NODE)
isl_die(ctx, isl_error_invalid, "expecting scalar node",
return NULL);
return strdup((char *) node->data.scalar.value);
}
static int extract_int(isl_ctx *ctx, yaml_document_t *document,
yaml_node_t *node)
{
if (node->type != YAML_SCALAR_NODE)
isl_die(ctx, isl_error_invalid, "expecting scalar node",
return -1);
return atoi((char *) node->data.scalar.value);
}
static double extract_double(isl_ctx *ctx, yaml_document_t *document,
yaml_node_t *node)
{
if (node->type != YAML_SCALAR_NODE)
isl_die(ctx, isl_error_invalid, "expecting scalar node",
return -1);
return strtod((char *) node->data.scalar.value, NULL);
}
static enum pet_expr_type extract_expr_type(isl_ctx *ctx,
yaml_document_t *document, yaml_node_t *node)
{
if (node->type != YAML_SCALAR_NODE)
isl_die(ctx, isl_error_invalid, "expecting scalar node",
return -1);
return pet_str_type((char *) node->data.scalar.value);
}
static enum pet_op_type extract_op(isl_ctx *ctx, yaml_document_t *document,
yaml_node_t *node)
{
if (node->type != YAML_SCALAR_NODE)
isl_die(ctx, isl_error_invalid, "expecting scalar node",
return -1);
return pet_str_op((char *) node->data.scalar.value);
}
static __isl_give isl_set *extract_set(isl_ctx *ctx, yaml_document_t *document,
yaml_node_t *node)
{
if (node->type != YAML_SCALAR_NODE)
isl_die(ctx, isl_error_invalid, "expecting scalar node",
return NULL);
return isl_set_read_from_str(ctx, (char *) node->data.scalar.value);
}
static __isl_give isl_id *extract_id(isl_ctx *ctx, yaml_document_t *document,
yaml_node_t *node)
{
if (node->type != YAML_SCALAR_NODE)
isl_die(ctx, isl_error_invalid, "expecting scalar node",
return NULL);
return isl_id_alloc(ctx, (char *) node->data.scalar.value, NULL);
}
static __isl_give isl_map *extract_map(isl_ctx *ctx, yaml_document_t *document,
yaml_node_t *node)
{
if (node->type != YAML_SCALAR_NODE)
isl_die(ctx, isl_error_invalid, "expecting scalar node",
return NULL);
return isl_map_read_from_str(ctx, (char *) node->data.scalar.value);
}
/* Extract an isl_union_set from "node".
*/
static __isl_give isl_union_set *extract_union_set(isl_ctx *ctx,
yaml_document_t *document, yaml_node_t *node)
{
if (node->type != YAML_SCALAR_NODE)
isl_die(ctx, isl_error_invalid, "expecting scalar node",
return NULL);
return isl_union_set_read_from_str(ctx,
(char *) node->data.scalar.value);
}
/* Extract an isl_union_map from "node".
*/
static __isl_give isl_union_map *extract_union_map(isl_ctx *ctx,
yaml_document_t *document, yaml_node_t *node)
{
if (node->type != YAML_SCALAR_NODE)
isl_die(ctx, isl_error_invalid, "expecting scalar node",
return NULL);
return isl_union_map_read_from_str(ctx,
(char *) node->data.scalar.value);
}
/* Extract an isl_val from "node".
*/
static __isl_give isl_val *extract_val(isl_ctx *ctx, yaml_document_t *document,
yaml_node_t *node)
{
if (node->type != YAML_SCALAR_NODE)
isl_die(ctx, isl_error_invalid, "expecting scalar node",
return NULL);
return isl_val_read_from_str(ctx, (char *) node->data.scalar.value);
}
/* Extract an isl_multi_pw_aff from "node".
*/
static __isl_give isl_multi_pw_aff *extract_multi_pw_aff(isl_ctx *ctx,
yaml_document_t *document, yaml_node_t *node)
{
if (node->type != YAML_SCALAR_NODE)
isl_die(ctx, isl_error_invalid, "expecting scalar node",
return NULL);
return isl_multi_pw_aff_read_from_str(ctx,
(char *) node->data.scalar.value);
}
/* Extract an isl_schedule from "node".
*/
static __isl_give isl_schedule *extract_schedule(isl_ctx *ctx,
yaml_document_t *document, yaml_node_t *node)
{
if (node->type != YAML_SCALAR_NODE)
isl_die(ctx, isl_error_invalid, "expecting scalar node",
return NULL);
return isl_schedule_read_from_str(ctx,
(char *) node->data.scalar.value);
}
/* Extract a pet_type from "node".
*/
static struct pet_type *extract_type(isl_ctx *ctx,
yaml_document_t *document, yaml_node_t *node)
{
struct pet_type *type;
yaml_node_pair_t * pair;
if (node->type != YAML_MAPPING_NODE)
isl_die(ctx, isl_error_invalid, "expecting mapping",
return NULL);
type = isl_calloc_type(ctx, struct pet_type);
if (!type)
return NULL;
for (pair = node->data.mapping.pairs.start;
pair < node->data.mapping.pairs.top; ++pair) {
yaml_node_t *key, *value;
key = yaml_document_get_node(document, pair->key);
value = yaml_document_get_node(document, pair->value);
if (key->type != YAML_SCALAR_NODE)
isl_die(ctx, isl_error_invalid, "expecting scalar key",
return pet_type_free(type));
if (!strcmp((char *) key->data.scalar.value, "name"))
type->name = extract_string(ctx, document, value);
if (!strcmp((char *) key->data.scalar.value, "definition"))
type->definition = extract_string(ctx, document, value);
}
return type;
}
/* Extract a sequence of types from "node" and store them in scop->types.
*/
static struct pet_scop *extract_types(isl_ctx *ctx,
yaml_document_t *document, yaml_node_t *node, struct pet_scop *scop)
{
int i;
yaml_node_item_t *item;
if (node->type != YAML_SEQUENCE_NODE)
isl_die(ctx, isl_error_invalid, "expecting sequence",
return NULL);
scop->n_type = node->data.sequence.items.top
- node->data.sequence.items.start;
scop->types = isl_calloc_array(ctx, struct pet_type *, scop->n_type);
if (!scop->types)
return pet_scop_free(scop);
for (item = node->data.sequence.items.start, i = 0;
item < node->data.sequence.items.top; ++item, ++i) {
yaml_node_t *n;
n = yaml_document_get_node(document, *item);
scop->types[i] = extract_type(ctx, document, n);
if (!scop->types[i])
return pet_scop_free(scop);
}
return scop;
}
static struct pet_array *extract_array(isl_ctx *ctx, yaml_document_t *document,
yaml_node_t *node)
{
struct pet_array *array;
yaml_node_pair_t * pair;
if (node->type != YAML_MAPPING_NODE)
isl_die(ctx, isl_error_invalid, "expecting mapping",
return NULL);
array = isl_calloc_type(ctx, struct pet_array);
if (!array)
return NULL;
for (pair = node->data.mapping.pairs.start;
pair < node->data.mapping.pairs.top; ++pair) {
yaml_node_t *key, *value;
key = yaml_document_get_node(document, pair->key);
value = yaml_document_get_node(document, pair->value);
if (key->type != YAML_SCALAR_NODE)
isl_die(ctx, isl_error_invalid, "expecting scalar key",
return pet_array_free(array));
if (!strcmp((char *) key->data.scalar.value, "context"))
array->context = extract_set(ctx, document, value);
if (!strcmp((char *) key->data.scalar.value, "extent"))
array->extent = extract_set(ctx, document, value);
if (!strcmp((char *) key->data.scalar.value, "value_bounds"))
array->value_bounds = extract_set(ctx, document, value);
if (!strcmp((char *) key->data.scalar.value, "element_type"))
array->element_type =
extract_string(ctx, document, value);
if (!strcmp((char *) key->data.scalar.value, "element_size"))
array->element_size = extract_int(ctx, document, value);
if (!strcmp((char *) key->data.scalar.value,
"element_is_record"))
array->element_is_record =
extract_int(ctx, document, value);
if (!strcmp((char *) key->data.scalar.value, "live_out"))
array->live_out = extract_int(ctx, document, value);
if (!strcmp((char *) key->data.scalar.value,
"uniquely_defined"))
array->uniquely_defined =
extract_int(ctx, document, value);
if (!strcmp((char *) key->data.scalar.value, "declared"))
array->declared = extract_int(ctx, document, value);
if (!strcmp((char *) key->data.scalar.value, "exposed"))
array->exposed = extract_int(ctx, document, value);
if (!strcmp((char *) key->data.scalar.value, "outer"))
array->outer = extract_int(ctx, document, value);
}
return array;
}
static struct pet_scop *extract_arrays(isl_ctx *ctx, yaml_document_t *document,
yaml_node_t *node, struct pet_scop *scop)
{
int i;
yaml_node_item_t *item;
if (node->type != YAML_SEQUENCE_NODE)
isl_die(ctx, isl_error_invalid, "expecting sequence",
return NULL);
scop->n_array = node->data.sequence.items.top
- node->data.sequence.items.start;
scop->arrays = isl_calloc_array(ctx, struct pet_array *, scop->n_array);
if (!scop->arrays)
return pet_scop_free(scop);
for (item = node->data.sequence.items.start, i = 0;
item < node->data.sequence.items.top; ++item, ++i) {
yaml_node_t *n;
n = yaml_document_get_node(document, *item);
scop->arrays[i] = extract_array(ctx, document, n);
if (!scop->arrays[i])
return pet_scop_free(scop);
}
return scop;
}
static __isl_give pet_expr *extract_expr(isl_ctx *ctx,
yaml_document_t *document, yaml_node_t *node);
static __isl_give pet_expr *extract_arguments(isl_ctx *ctx,
yaml_document_t *document, yaml_node_t *node, __isl_take pet_expr *expr)
{
int i, n;
yaml_node_item_t *item;
if (node->type != YAML_SEQUENCE_NODE)
isl_die(ctx, isl_error_invalid, "expecting sequence",
return pet_expr_free(expr));
n = node->data.sequence.items.top - node->data.sequence.items.start;
expr = pet_expr_set_n_arg(expr, n);
for (item = node->data.sequence.items.start, i = 0;
item < node->data.sequence.items.top; ++item, ++i) {
yaml_node_t *n;
pet_expr *arg;
n = yaml_document_get_node(document, *item);
arg = extract_expr(ctx, document, n);
expr = pet_expr_set_arg(expr, i, arg);
}
return expr;
}
/* Extract pet_expr_double specific fields from "node" and
* update "expr" accordingly.
*/
static __isl_give pet_expr *extract_expr_double(isl_ctx *ctx,
yaml_document_t *document, yaml_node_t *node, __isl_take pet_expr *expr)
{
yaml_node_pair_t *pair;
double d = 0;
char *s = NULL;
for (pair = node->data.mapping.pairs.start;
pair < node->data.mapping.pairs.top; ++pair) {
yaml_node_t *key, *value;
key = yaml_document_get_node(document, pair->key);
value = yaml_document_get_node(document, pair->value);
if (key->type != YAML_SCALAR_NODE)
isl_die(ctx, isl_error_invalid, "expecting scalar key",
return pet_expr_free(expr));
if (!strcmp((char *) key->data.scalar.value, "value"))
d = extract_double(ctx, document, value);
if (!strcmp((char *) key->data.scalar.value, "string"))
s = extract_string(ctx, document, value);
}
expr = pet_expr_double_set(expr, d, s);
free(s);
return expr;
}
/* Extract pet_expr_access specific fields from "node" and
* update "expr" accordingly.
*
* The depth of the access is initialized by pet_expr_access_set_index.
* Any explicitly specified depth therefore needs to be set after
* setting the index expression. Similiarly, the access relations (if any)
* need to be set after setting the depth.
*/
static __isl_give pet_expr *extract_expr_access(isl_ctx *ctx,
yaml_document_t *document, yaml_node_t *node, __isl_take pet_expr *expr)
{
yaml_node_pair_t *pair;
int depth = -1;
isl_multi_pw_aff *index = NULL;
for (pair = node->data.mapping.pairs.start;
pair < node->data.mapping.pairs.top; ++pair) {
yaml_node_t *key, *value;
key = yaml_document_get_node(document, pair->key);
value = yaml_document_get_node(document, pair->value);
if (key->type != YAML_SCALAR_NODE)
isl_die(ctx, isl_error_invalid, "expecting scalar key",
return pet_expr_free(expr));
if (!strcmp((char *) key->data.scalar.value, "index"))
index = extract_multi_pw_aff(ctx, document, value);
if (!strcmp((char *) key->data.scalar.value, "depth"))
depth = extract_int(ctx, document, value);
}
expr = pet_expr_access_set_index(expr, index);
if (depth >= 0)
expr = pet_expr_access_set_depth(expr, depth);
for (pair = node->data.mapping.pairs.start;
pair < node->data.mapping.pairs.top; ++pair) {
yaml_node_t *key, *value;
key = yaml_document_get_node(document, pair->key);
value = yaml_document_get_node(document, pair->value);
if (key->type != YAML_SCALAR_NODE)
isl_die(ctx, isl_error_invalid, "expecting scalar key",
return pet_expr_free(expr));
if (!strcmp((char *) key->data.scalar.value, "may_read"))
expr = pet_expr_access_set_access(expr,
pet_expr_access_may_read,
extract_union_map(ctx, document, value));
if (!strcmp((char *) key->data.scalar.value, "may_write"))
expr = pet_expr_access_set_access(expr,
pet_expr_access_may_write,
extract_union_map(ctx, document, value));
if (!strcmp((char *) key->data.scalar.value, "must_write"))
expr = pet_expr_access_set_access(expr,
pet_expr_access_must_write,
extract_union_map(ctx, document, value));
if (!strcmp((char *) key->data.scalar.value, "killed"))
expr = pet_expr_access_set_access(expr,
pet_expr_access_killed,
extract_union_map(ctx, document, value));
if (!strcmp((char *) key->data.scalar.value, "reference"))
expr = pet_expr_access_set_ref_id(expr,
extract_id(ctx, document, value));
if (!strcmp((char *) key->data.scalar.value, "read"))
expr = pet_expr_access_set_read(expr,
extract_int(ctx, document, value));
if (!strcmp((char *) key->data.scalar.value, "write"))
expr = pet_expr_access_set_write(expr,
extract_int(ctx, document, value));
if (!strcmp((char *) key->data.scalar.value, "kill"))
expr = pet_expr_access_set_kill(expr,
extract_int(ctx, document, value));
}
return expr;
}
/* Extract operation expression specific fields from "node" and
* update "expr" accordingly.
*/
static __isl_give pet_expr *extract_expr_op(isl_ctx *ctx,
yaml_document_t *document, yaml_node_t *node, __isl_take pet_expr *expr)
{
yaml_node_pair_t *pair;
for (pair = node->data.mapping.pairs.start;
pair < node->data.mapping.pairs.top; ++pair) {
yaml_node_t *key, *value;
key = yaml_document_get_node(document, pair->key);
value = yaml_document_get_node(document, pair->value);
if (key->type != YAML_SCALAR_NODE)
isl_die(ctx, isl_error_invalid, "expecting scalar key",
return pet_expr_free(expr));
if (!strcmp((char *) key->data.scalar.value, "operation"))
expr = pet_expr_op_set_type(expr,
extract_op(ctx, document, value));
}
return expr;
}
/* Extract pet_expr_call specific fields from "node" and
* update "expr" accordingly.
*/
static __isl_give pet_expr *extract_expr_call(isl_ctx *ctx,
yaml_document_t *document, yaml_node_t *node, __isl_take pet_expr *expr)
{
yaml_node_pair_t *pair;
for (pair = node->data.mapping.pairs.start;
pair < node->data.mapping.pairs.top; ++pair) {
yaml_node_t *key, *value;
key = yaml_document_get_node(document, pair->key);
value = yaml_document_get_node(document, pair->value);
if (key->type != YAML_SCALAR_NODE)
isl_die(ctx, isl_error_invalid, "expecting scalar key",
return pet_expr_free(expr));
if (!strcmp((char *) key->data.scalar.value, "name"))
expr = pet_expr_call_set_name(expr,
extract_string(ctx, document, value));
}
return expr;
}
/* Extract pet_expr_cast specific fields from "node" and
* update "expr" accordingly.
*/
static __isl_give pet_expr *extract_expr_cast(isl_ctx *ctx,
yaml_document_t *document, yaml_node_t *node, __isl_take pet_expr *expr)
{
yaml_node_pair_t *pair;
for (pair = node->data.mapping.pairs.start;
pair < node->data.mapping.pairs.top; ++pair) {
yaml_node_t *key, *value;
key = yaml_document_get_node(document, pair->key);
value = yaml_document_get_node(document, pair->value);
if (key->type != YAML_SCALAR_NODE)
isl_die(ctx, isl_error_invalid, "expecting scalar key",
return pet_expr_free(expr));
if (!strcmp((char *) key->data.scalar.value, "type_name"))
expr = pet_expr_cast_set_type_name(expr,
extract_string(ctx, document, value));
}
return expr;
}
/* Extract pet_expr_int specific fields from "node" and
* update "expr" accordingly.
*/
static __isl_give pet_expr *extract_expr_int(isl_ctx *ctx,
yaml_document_t *document, yaml_node_t *node, __isl_take pet_expr *expr)
{
yaml_node_pair_t * pair;
for (pair = node->data.mapping.pairs.start;
pair < node->data.mapping.pairs.top; ++pair) {
yaml_node_t *key, *value;
key = yaml_document_get_node(document, pair->key);
value = yaml_document_get_node(document, pair->value);
if (key->type != YAML_SCALAR_NODE)
isl_die(ctx, isl_error_invalid, "expecting scalar key",
return pet_expr_free(expr));
if (!strcmp((char *) key->data.scalar.value, "value"))
expr = pet_expr_int_set_val(expr,
extract_val(ctx, document, value));
}
return expr;
}
/* Extract a pet_expr from "node".
*
* We first extract the type and arguments of the expression and
* then extract additional fields depending on the type.
*/
static __isl_give pet_expr *extract_expr(isl_ctx *ctx,
yaml_document_t *document, yaml_node_t *node)
{
enum pet_expr_type type = pet_expr_error;
pet_expr *expr;
yaml_node_pair_t *pair;
if (node->type != YAML_MAPPING_NODE)
isl_die(ctx, isl_error_invalid, "expecting mapping",
return NULL);
for (pair = node->data.mapping.pairs.start;
pair < node->data.mapping.pairs.top; ++pair) {
yaml_node_t *key, *value;
key = yaml_document_get_node(document, pair->key);
value = yaml_document_get_node(document, pair->value);
if (key->type != YAML_SCALAR_NODE)
isl_die(ctx, isl_error_invalid, "expecting scalar key",
return NULL);
if (!strcmp((char *) key->data.scalar.value, "type"))
type = extract_expr_type(ctx, document, value);
}
if (type == pet_expr_error)
isl_die(ctx, isl_error_invalid, "cannot determine type",
return NULL);
expr = pet_expr_alloc(ctx, type);
if (!expr)
return NULL;
for (pair = node->data.mapping.pairs.start;
pair < node->data.mapping.pairs.top; ++pair) {
yaml_node_t *key, *value;
key = yaml_document_get_node(document, pair->key);
value = yaml_document_get_node(document, pair->value);
if (!strcmp((char *) key->data.scalar.value, "arguments"))
expr = extract_arguments(ctx, document, value, expr);
if (!expr)
return NULL;
}
switch (type) {
case pet_expr_error:
isl_die(ctx, isl_error_internal, "unreachable code",
return NULL);
case pet_expr_access:
expr = extract_expr_access(ctx, document, node, expr);
break;
case pet_expr_double:
expr = extract_expr_double(ctx, document, node, expr);
break;
case pet_expr_call:
expr = extract_expr_call(ctx, document, node, expr);
break;
case pet_expr_cast:
expr = extract_expr_cast(ctx, document, node, expr);
break;
case pet_expr_int:
expr = extract_expr_int(ctx, document, node, expr);
break;
case pet_expr_op:
expr = extract_expr_op(ctx, document, node, expr);
break;
}
return expr;
}
/* Extract a pet_tree_type from "node".
*/
static enum pet_tree_type extract_tree_type(isl_ctx *ctx,
yaml_document_t *document, yaml_node_t *node)
{
if (node->type != YAML_SCALAR_NODE)
isl_die(ctx, isl_error_invalid, "expecting scalar node",
return -1);
return pet_tree_str_type((char *) node->data.scalar.value);
}
static __isl_give pet_tree *extract_tree(isl_ctx *ctx,
yaml_document_t *document, yaml_node_t *node);
/* Extract a pet_tree of type pet_tree_block from "node".
*/
static __isl_give pet_tree *extract_tree_block(isl_ctx *ctx,
yaml_document_t *document, yaml_node_t *node)
{
int block = 0;
int i, n;
yaml_node_pair_t *pair;
yaml_node_item_t *item;
yaml_node_t *children = NULL;
pet_tree *tree;
for (pair = node->data.mapping.pairs.start;
pair < node->data.mapping.pairs.top; ++pair) {
yaml_node_t *key, *value;
key = yaml_document_get_node(document, pair->key);
value = yaml_document_get_node(document, pair->value);
if (key->type != YAML_SCALAR_NODE)
isl_die(ctx, isl_error_invalid, "expecting scalar key",
return NULL);
if (!strcmp((char *) key->data.scalar.value, "block"))
block = extract_int(ctx, document, value);
if (!strcmp((char *) key->data.scalar.value, "children"))
children = value;
}
if (!children)
n = 0;
else
n = children->data.sequence.items.top -
children->data.sequence.items.start;
tree = pet_tree_new_block(ctx, block, n);
if (!children)
return tree;
for (item = children->data.sequence.items.start, i = 0;
item < children->data.sequence.items.top; ++item, ++i) {
yaml_node_t *n;
pet_tree *child;
n = yaml_document_get_node(document, *item);
child = extract_tree(ctx, document, n);
tree = pet_tree_block_add_child(tree, child);
}
return tree;
}
/* Extract a pet_tree of type pet_tree_decl from "node".
*/
static __isl_give pet_tree *extract_tree_decl(isl_ctx *ctx,
yaml_document_t *document, yaml_node_t *node)
{
yaml_node_pair_t *pair;
pet_expr *var = NULL;
for (pair = node->data.mapping.pairs.start;
pair < node->data.mapping.pairs.top; ++pair) {
yaml_node_t *key, *value;
key = yaml_document_get_node(document, pair->key);
value = yaml_document_get_node(document, pair->value);
if (key->type != YAML_SCALAR_NODE)
isl_die(ctx, isl_error_invalid, "expecting scalar key",
return NULL);
if (!strcmp((char *) key->data.scalar.value, "variable")) {
var = extract_expr(ctx, document, value);
if (!var)
return NULL;
}
}
if (!var)
isl_die(ctx, isl_error_invalid,
"no variable field", return NULL);
return pet_tree_new_decl(var);
}
/* Extract a pet_tree of type pet_tree_decl_init from "node".
*/
static __isl_give pet_tree *extract_tree_decl_init(isl_ctx *ctx,
yaml_document_t *document, yaml_node_t *node)
{
yaml_node_pair_t *pair;
pet_expr *var = NULL;
pet_expr *init = NULL;
for (pair = node->data.mapping.pairs.start;
pair < node->data.mapping.pairs.top; ++pair) {
yaml_node_t *key, *value;
key = yaml_document_get_node(document, pair->key);
value = yaml_document_get_node(document, pair->value);
if (key->type != YAML_SCALAR_NODE)
isl_die(ctx, isl_error_invalid, "expecting scalar key",
return NULL);
if (!strcmp((char *) key->data.scalar.value, "variable")) {
var = extract_expr(ctx, document, value);
if (!var)
goto error;
}
if (!strcmp((char *) key->data.scalar.value,
"initialization")) {
init = extract_expr(ctx, document, value);
if (!init)
goto error;
}
}
if (!var)
isl_die(ctx, isl_error_invalid,
"no variable field", goto error);
if (!init)
isl_die(ctx, isl_error_invalid,
"no initialization field", goto error);
return pet_tree_new_decl_init(var, init);
error:
pet_expr_free(var);
pet_expr_free(init);
return NULL;
}
/* Extract a pet_expr corresponding to a pet_tree with a single "expr" field
* from "node".
*/
static __isl_give pet_expr *extract_expr_field(isl_ctx *ctx,
yaml_document_t *document, yaml_node_t *node)
{
yaml_node_pair_t *pair;
pet_expr *expr = NULL;
for (pair = node->data.mapping.pairs.start;
pair < node->data.mapping.pairs.top; ++pair) {
yaml_node_t *key, *value;
key = yaml_document_get_node(document, pair->key);
value = yaml_document_get_node(document, pair->value);
if (key->type != YAML_SCALAR_NODE)
isl_die(ctx, isl_error_invalid, "expecting scalar key",
return NULL);
if (!strcmp((char *) key->data.scalar.value, "expr")) {
expr = extract_expr(ctx, document, value);
if (!expr)
return NULL;
}
}
if (!expr)
isl_die(ctx, isl_error_invalid,
"no expr field", return NULL);
return expr;
}
/* Extract a pet_tree of type pet_tree_expr from "node".
*/
static __isl_give pet_tree *extract_tree_expr(isl_ctx *ctx,
yaml_document_t *document, yaml_node_t *node)
{
return pet_tree_new_expr(extract_expr_field(ctx, document, node));
}
/* Extract a pet_tree of type pet_tree_return from "node".
*/
static __isl_give pet_tree *extract_tree_return(isl_ctx *ctx,
yaml_document_t *document, yaml_node_t *node)
{
return pet_tree_new_return(extract_expr_field(ctx, document, node));
}
/* Extract a pet_tree of type pet_tree_while from "node".
*/
static __isl_give pet_tree *extract_tree_while(isl_ctx *ctx,
yaml_document_t *document, yaml_node_t *node)
{
yaml_node_pair_t *pair;
pet_expr *cond = NULL;
pet_tree *body = NULL;
for (pair = node->data.mapping.pairs.start;
pair < node->data.mapping.pairs.top; ++pair) {
yaml_node_t *key, *value;
key = yaml_document_get_node(document, pair->key);
value = yaml_document_get_node(document, pair->value);
if (key->type != YAML_SCALAR_NODE)
isl_die(ctx, isl_error_invalid, "expecting scalar key",
return NULL);
if (!strcmp((char *) key->data.scalar.value, "condition")) {
cond = extract_expr(ctx, document, value);
if (!cond)
goto error;
}
if (!strcmp((char *) key->data.scalar.value, "body")) {
body = extract_tree(ctx, document, value);
if (!body)
goto error;
}
}
if (!cond)
isl_die(ctx, isl_error_invalid,
"no condition field", goto error);
if (!body)
isl_die(ctx, isl_error_invalid,
"no body field", goto error);
return pet_tree_new_while(cond, body);
error:
pet_expr_free(cond);
pet_tree_free(body);
return NULL;
}
/* Extract a pet_tree of type pet_tree_infinite_loop from "node".
*/
static __isl_give pet_tree *extract_tree_infinite_loop(isl_ctx *ctx,
yaml_document_t *document, yaml_node_t *node)
{
yaml_node_pair_t *pair;
pet_tree *body;
for (pair = node->data.mapping.pairs.start;
pair < node->data.mapping.pairs.top; ++pair) {
yaml_node_t *key, *value;
key = yaml_document_get_node(document, pair->key);
value = yaml_document_get_node(document, pair->value);
if (key->type != YAML_SCALAR_NODE)
isl_die(ctx, isl_error_invalid, "expecting scalar key",
return NULL);
if (!strcmp((char *) key->data.scalar.value, "body")) {
body = extract_tree(ctx, document, value);
if (!body)
return NULL;
}
}
if (!body)
isl_die(ctx, isl_error_invalid,
"no body field", return NULL);
return pet_tree_new_infinite_loop(body);
}
/* Extract a pet_tree of type pet_tree_if from "node".
*/
static __isl_give pet_tree *extract_tree_if(isl_ctx *ctx,
yaml_document_t *document, yaml_node_t *node)
{
yaml_node_pair_t *pair;
pet_expr *cond = NULL;
pet_tree *then_body = NULL;
for (pair = node->data.mapping.pairs.start;
pair < node->data.mapping.pairs.top; ++pair) {
yaml_node_t *key, *value;
key = yaml_document_get_node(document, pair->key);
value = yaml_document_get_node(document, pair->value);
if (key->type != YAML_SCALAR_NODE)
isl_die(ctx, isl_error_invalid, "expecting scalar key",
return NULL);
if (!strcmp((char *) key->data.scalar.value, "condition")) {
cond = extract_expr(ctx, document, value);
if (!cond)
goto error;
}
if (!strcmp((char *) key->data.scalar.value, "then")) {
then_body = extract_tree(ctx, document, value);
if (!then_body)
goto error;
}
}
if (!cond)
isl_die(ctx, isl_error_invalid,
"no condition field", goto error);
if (!then_body)
isl_die(ctx, isl_error_invalid,
"no then body", goto error);
return pet_tree_new_if(cond, then_body);
error:
pet_expr_free(cond);
pet_tree_free(then_body);
return NULL;
}