*
* BabelTrace - Sequence Type Converter
*
- * Copyright 2010 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+ * Copyright 2010-2011 EfficiOS Inc. and Linux Foundation
+ *
+ * Author: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
#include <babeltrace/compiler.h>
#include <babeltrace/format.h>
+#include <babeltrace/types.h>
+#include <inttypes.h>
+
+static
+struct definition *_sequence_definition_new(struct declaration *declaration,
+ struct definition_scope *parent_scope,
+ GQuark field_name, int index,
+ const char *root_name);
+static
+void _sequence_definition_free(struct definition *definition);
-void sequence_copy(struct stream_pos *dest, const struct format *fdest,
- struct stream_pos *src, const struct format *fsrc,
- const struct type_class *type_class)
+int sequence_rw(struct stream_pos *pos, struct definition *definition)
{
- struct type_class_sequence *sequence_class =
- container_of(type_class, struct type_class_sequence, p);
- unsigned int i;
- size_t len;
+ struct definition_sequence *sequence_definition =
+ container_of(definition, struct definition_sequence, p);
+ const struct declaration_sequence *sequence_declaration =
+ sequence_definition->declaration;
+ uint64_t len, oldlen, i;
+ int ret;
+
+ len = sequence_definition->length->value._unsigned;
+ /*
+ * Yes, large sequences could be _painfully slow_ to parse due
+ * to memory allocation for each event read. At least, never
+ * shrink the sequence. Note: the sequence GArray len should
+ * never be used as indicator of the current sequence length.
+ * One should always look at the sequence->len->value._unsigned
+ * value for that.
+ */
+ oldlen = sequence_definition->elems->len;
+ if (oldlen < len)
+ g_ptr_array_set_size(sequence_definition->elems, len);
- fsrc->sequence_begin(src, sequence_class);
- fdest->sequence_begin(dest, sequence_class);
+ for (i = oldlen; i < len; i++) {
+ struct definition **field;
+ GString *str;
+ GQuark name;
- len = fsrc->uint_read(src, sequence_class->len_class);
- fdest->uint_write(dest, sequence_class->len_class, len);
+ str = g_string_new("");
+ g_string_printf(str, "[%" PRIu64 "]", i);
+ name = g_quark_from_string(str->str);
+ (void) g_string_free(str, TRUE);
+ field = (struct definition **) &g_ptr_array_index(sequence_definition->elems, i);
+ *field = sequence_declaration->elem->definition_new(sequence_declaration->elem,
+ sequence_definition->p.scope,
+ name, i, NULL);
+ }
for (i = 0; i < len; i++) {
- struct type_class *elem_class = sequence_class->elem;
- elem_class->copy(dest, fdest, src, fsrc, elem_class);
+ struct definition **field;
+
+ field = (struct definition **) &g_ptr_array_index(sequence_definition->elems, i);
+ ret = generic_rw(pos, *field);
+ if (ret)
+ return ret;
}
- fsrc->sequence_end(src, sequence_class);
- fdest->sequence_end(dest, sequence_class);
+ return 0;
}
-void sequence_type_free(struct type_class_sequence *sequence_class)
+static
+void _sequence_declaration_free(struct declaration *declaration)
{
- sequence_class->elem->free(sequence_class->elem);
- type_unref(&sequence_class->len_class->p);
- type_unref(sequence_class->elem);
- g_free(sequence_class);
+ struct declaration_sequence *sequence_declaration =
+ container_of(declaration, struct declaration_sequence, p);
+
+ free_declaration_scope(sequence_declaration->scope);
+ g_array_free(sequence_declaration->length_name, TRUE);
+ declaration_unref(sequence_declaration->elem);
+ g_free(sequence_declaration);
}
-static void _sequence_type_free(struct type_class *type_class)
+struct declaration_sequence *
+ sequence_declaration_new(const char *length,
+ struct declaration *elem_declaration,
+ struct declaration_scope *parent_scope)
{
- struct type_class_sequence *sequence_class =
- container_of(type_class, struct type_class_sequence, p);
- sequence_type_free(sequence_class);
+ struct declaration_sequence *sequence_declaration;
+ struct declaration *declaration;
+
+ sequence_declaration = g_new(struct declaration_sequence, 1);
+ declaration = &sequence_declaration->p;
+
+ sequence_declaration->length_name = g_array_new(FALSE, TRUE, sizeof(GQuark));
+ append_scope_path(length, sequence_declaration->length_name);
+
+ declaration_ref(elem_declaration);
+ sequence_declaration->elem = elem_declaration;
+ sequence_declaration->scope = new_declaration_scope(parent_scope);
+ declaration->id = CTF_TYPE_SEQUENCE;
+ declaration->alignment = elem_declaration->alignment;
+ declaration->declaration_free = _sequence_declaration_free;
+ declaration->definition_new = _sequence_definition_new;
+ declaration->definition_free = _sequence_definition_free;
+ declaration->ref = 1;
+ return sequence_declaration;
}
-struct type_class_sequence *
-sequence_type_new(const char *name, struct type_class_integer *len_class,
- struct type_class *elem)
+static
+struct definition *_sequence_definition_new(struct declaration *declaration,
+ struct definition_scope *parent_scope,
+ GQuark field_name, int index,
+ const char *root_name)
{
- struct type_class_sequence *sequence_class;
- struct type_class *type_class;
+ struct declaration_sequence *sequence_declaration =
+ container_of(declaration, struct declaration_sequence, p);
+ struct definition_sequence *sequence;
+ struct definition *len_parent;
int ret;
- sequence_class = g_new(struct type_class_sequence, 1);
- type_class = &sequence_class->p;
+ sequence = g_new(struct definition_sequence, 1);
+ declaration_ref(&sequence_declaration->p);
+ sequence->p.declaration = declaration;
+ sequence->declaration = sequence_declaration;
+ sequence->p.ref = 1;
+ /*
+ * Use INT_MAX order to ensure that all fields of the parent
+ * scope are seen as being prior to this scope.
+ */
+ sequence->p.index = root_name ? INT_MAX : index;
+ sequence->p.name = field_name;
+ sequence->p.path = new_definition_path(parent_scope, field_name, root_name);
+ sequence->p.scope = new_definition_scope(parent_scope, field_name, root_name);
+ ret = register_field_definition(field_name, &sequence->p,
+ parent_scope);
+ assert(!ret);
+ len_parent = lookup_path_definition(sequence->p.scope->scope_path,
+ sequence_declaration->length_name,
+ parent_scope);
+ if (!len_parent) {
+ printf("[error] Lookup for sequence length field failed.\n");
+ goto error;
+ }
+ sequence->length =
+ container_of(len_parent, struct definition_integer, p);
+ if (sequence->length->declaration->signedness) {
+ printf("[error] Sequence length field should be unsigned.\n");
+ goto error;
+ }
+ definition_ref(len_parent);
- assert(!len_class->signedness);
+ sequence->string = NULL;
+ sequence->elems = NULL;
- type_ref(&len_class->p);
- sequence_class->len_class = len_class;
- type_ref(elem);
- sequence_class->elem = elem;
- type_class->name = g_quark_from_string(name);
- type_class->alignment = max(len_class->p.alignment,
- elem->alignment);
- type_class->copy = sequence_copy;
- type_class->free = _sequence_type_free;
- type_class->ref = 1;
+ if (sequence_declaration->elem->id == CTF_TYPE_INTEGER) {
+ struct declaration_integer *integer_declaration =
+ container_of(sequence_declaration->elem, struct declaration_integer, p);
- if (type_class->name) {
- ret = ctf_register_type(type_class);
- if (ret)
- goto error_register;
+ if (integer_declaration->encoding == CTF_STRING_UTF8
+ || integer_declaration->encoding == CTF_STRING_ASCII) {
+
+ sequence->string = g_string_new("");
+
+ if (integer_declaration->len == CHAR_BIT
+ && integer_declaration->p.alignment == CHAR_BIT) {
+ return &sequence->p;
+ }
+ }
}
- return sequence_class;
-error_register:
- type_unref(&len_class->p);
- type_unref(elem);
- g_free(sequence_class);
+ sequence->elems = g_ptr_array_new();
+ return &sequence->p;
+
+error:
+ free_definition_scope(sequence->p.scope);
+ declaration_unref(&sequence_declaration->p);
+ g_free(sequence);
return NULL;
}
+
+static
+void _sequence_definition_free(struct definition *definition)
+{
+ struct definition_sequence *sequence =
+ container_of(definition, struct definition_sequence, p);
+ struct definition *len_definition = &sequence->length->p;
+ uint64_t i;
+
+ if (sequence->string)
+ (void) g_string_free(sequence->string, TRUE);
+ if (sequence->elems) {
+ for (i = 0; i < sequence->elems->len; i++) {
+ struct definition *field;
+
+ field = g_ptr_array_index(sequence->elems, i);
+ field->declaration->definition_free(field);
+ }
+ }
+ (void) g_ptr_array_free(sequence->elems, TRUE);
+ definition_unref(len_definition);
+ free_definition_scope(sequence->p.scope);
+ declaration_unref(sequence->p.declaration);
+ g_free(sequence);
+}
+
+uint64_t sequence_len(struct definition_sequence *sequence)
+{
+ return sequence->length->value._unsigned;
+}
+
+struct definition *sequence_index(struct definition_sequence *sequence, uint64_t i)
+{
+ if (!sequence->elems)
+ return NULL;
+ if (i >= sequence->length->value._unsigned)
+ return NULL;
+ assert(i < sequence->elems->len);
+ return g_ptr_array_index(sequence->elems, i);
+}
projects / babeltrace.git / blobdiff