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From dcrea...@apache.org
Subject svn commit: r1146546 [3/5] - in /avro/trunk/lang/c: docs/ src/ src/avro/ tests/
Date Thu, 14 Jul 2011 02:35:09 GMT
Added: avro/trunk/lang/c/src/generic-primitives.c
URL: http://svn.apache.org/viewvc/avro/trunk/lang/c/src/generic-primitives.c?rev=1146546&view=auto
==============================================================================
--- avro/trunk/lang/c/src/generic-primitives.c (added)
+++ avro/trunk/lang/c/src/generic-primitives.c Thu Jul 14 02:35:04 2011
@@ -0,0 +1,1210 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to you under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+ * implied.  See the License for the specific language governing
+ * permissions and limitations under the License.
+ */
+
+#include <errno.h>
+#include <stdbool.h>
+#include <stdint.h>
+#include <stdlib.h>
+
+#include "avro/allocation.h"
+#include "avro/data.h"
+#include "avro/generic.h"
+#include "avro/schema.h"
+#include "avro/value.h"
+#include "avro_private.h"
+
+
+/*-----------------------------------------------------------------------
+ * boolean
+ */
+
+static size_t
+avro_generic_boolean_instance_size(const avro_value_iface_t *iface)
+{
+	AVRO_UNUSED(iface);
+	return sizeof(int);
+}
+
+static int
+avro_generic_boolean_init(const avro_value_iface_t *iface, void *vself)
+{
+	AVRO_UNUSED(iface);
+	int  *self = vself;
+	*self = 0;
+	return 0;
+}
+
+static void
+avro_generic_boolean_done(const avro_value_iface_t *iface, void *vself)
+{
+	AVRO_UNUSED(iface);
+	AVRO_UNUSED(vself);
+}
+
+static int
+avro_generic_boolean_reset(const avro_value_iface_t *iface, void *vself)
+{
+	AVRO_UNUSED(iface);
+	int  *self = vself;
+	*self = 0;
+	return 0;
+}
+
+static avro_type_t
+avro_generic_boolean_get_type(const avro_value_iface_t *iface, const void *vself)
+{
+	AVRO_UNUSED(iface);
+	AVRO_UNUSED(vself);
+	return AVRO_BOOLEAN;
+}
+
+static avro_schema_t
+avro_generic_boolean_get_schema(const avro_value_iface_t *iface, const void *vself)
+{
+	AVRO_UNUSED(iface);
+	AVRO_UNUSED(vself);
+	return avro_schema_boolean();
+}
+
+static int
+avro_generic_boolean_get(const avro_value_iface_t *iface,
+			 const void *vself, bool *out)
+{
+	AVRO_UNUSED(iface);
+	const int  *self = vself;
+	*out = *self;
+	return 0;
+}
+
+static int
+avro_generic_boolean_set(const avro_value_iface_t *iface,
+			 void *vself, bool val)
+{
+	AVRO_UNUSED(iface);
+	int  *self = vself;
+	*self = val;
+	return 0;
+}
+
+static avro_value_iface_t  AVRO_GENERIC_BOOLEAN_CLASS =
+{
+	/* "class" methods */
+	NULL, /* incref */
+	NULL, /* decref */
+	avro_generic_boolean_instance_size,
+	/* general "instance" methods */
+	avro_generic_boolean_init,
+	avro_generic_boolean_done,
+	avro_generic_boolean_reset,
+	avro_generic_boolean_get_type,
+	avro_generic_boolean_get_schema,
+	/* primitive getters */
+	avro_generic_boolean_get,
+	NULL, /* get_bytes */
+	NULL, /* grab_bytes */
+	NULL, /* get_double */
+	NULL, /* get_float */
+	NULL, /* get_int */
+	NULL, /* get_long */
+	NULL, /* get_null */
+	NULL, /* get_string */
+	NULL, /* grab_string */
+	NULL, /* get_enum */
+	NULL, /* get_fixed */
+	NULL, /* grab_fixed */
+	/* primitive setters */
+	avro_generic_boolean_set,
+	NULL, /* set_bytes */
+	NULL, /* give_bytes */
+	NULL, /* set_double */
+	NULL, /* set_float */
+	NULL, /* set_int */
+	NULL, /* set_long */
+	NULL, /* set_null */
+	NULL, /* set_string */
+	NULL, /* set_string_length */
+	NULL, /* give_string_length */
+	NULL, /* set_enum */
+	NULL, /* set_fixed */
+	NULL, /* give_fixed */
+	/* compound getters */
+	NULL, /* get_size */
+	NULL, /* get_by_index */
+	NULL, /* get_by_name */
+	NULL, /* get_discriminant */
+	NULL, /* get_current_branch */
+	/* compound setters */
+	NULL, /* append */
+	NULL, /* add */
+	NULL  /* set_branch */
+};
+
+avro_value_iface_t *avro_generic_boolean_class(void)
+{
+	return &AVRO_GENERIC_BOOLEAN_CLASS;
+}
+
+int avro_generic_boolean_new(avro_value_t *value, bool val)
+{
+	int  rval;
+	check(rval, avro_value_new(&AVRO_GENERIC_BOOLEAN_CLASS, value));
+	return avro_generic_boolean_set(value->iface, value->self, val);
+}
+
+/*-----------------------------------------------------------------------
+ * bytes
+ */
+
+static size_t
+avro_generic_bytes_instance_size(const avro_value_iface_t *iface)
+{
+	AVRO_UNUSED(iface);
+	return sizeof(avro_raw_string_t);
+}
+
+static int
+avro_generic_bytes_init(const avro_value_iface_t *iface, void *vself)
+{
+	AVRO_UNUSED(iface);
+	avro_raw_string_t  *self = vself;
+	avro_raw_string_init(self);
+	return 0;
+}
+
+static void
+avro_generic_bytes_done(const avro_value_iface_t *iface, void *vself)
+{
+	AVRO_UNUSED(iface);
+	avro_raw_string_t  *self = vself;
+	avro_raw_string_done(self);
+}
+
+static int
+avro_generic_bytes_reset(const avro_value_iface_t *iface, void *vself)
+{
+	AVRO_UNUSED(iface);
+	avro_raw_string_t  *self = vself;
+	avro_raw_string_clear(self);
+	return 0;
+}
+
+static avro_type_t
+avro_generic_bytes_get_type(const avro_value_iface_t *iface, const void *vself)
+{
+	AVRO_UNUSED(iface);
+	AVRO_UNUSED(vself);
+	return AVRO_BYTES;
+}
+
+static avro_schema_t
+avro_generic_bytes_get_schema(const avro_value_iface_t *iface, const void *vself)
+{
+	AVRO_UNUSED(iface);
+	AVRO_UNUSED(vself);
+	return avro_schema_bytes();
+}
+
+static int
+avro_generic_bytes_get(const avro_value_iface_t *iface,
+		       const void *vself, const void **buf, size_t *size)
+{
+	AVRO_UNUSED(iface);
+	const avro_raw_string_t  *self = vself;
+	if (buf != NULL) {
+		*buf = avro_raw_string_get(self);
+	}
+	if (size != NULL) {
+		*size = avro_raw_string_length(self);
+	}
+	return 0;
+}
+
+static int
+avro_generic_bytes_grab(const avro_value_iface_t *iface,
+			const void *vself, avro_wrapped_buffer_t *dest)
+{
+	AVRO_UNUSED(iface);
+	const avro_raw_string_t  *self = vself;
+	return avro_raw_string_grab(self, dest);
+}
+
+static int
+avro_generic_bytes_set(const avro_value_iface_t *iface,
+		       void *vself, void *buf, size_t size)
+{
+	AVRO_UNUSED(iface);
+	check_param(EINVAL, buf != NULL, "bytes contents");
+	avro_raw_string_t  *self = vself;
+	avro_raw_string_set_length(self, buf, size);
+	return 0;
+}
+
+static int
+avro_generic_bytes_give(const avro_value_iface_t *iface,
+			void *vself, avro_wrapped_buffer_t *buf)
+{
+	AVRO_UNUSED(iface);
+	avro_raw_string_t  *self = vself;
+	avro_raw_string_give(self, buf);
+	return 0;
+}
+
+static avro_value_iface_t  AVRO_GENERIC_BYTES_CLASS =
+{
+	/* "class" methods */
+	NULL, /* incref */
+	NULL, /* decref */
+	avro_generic_bytes_instance_size,
+	/* general "instance" methods */
+	avro_generic_bytes_init,
+	avro_generic_bytes_done,
+	avro_generic_bytes_reset,
+	avro_generic_bytes_get_type,
+	avro_generic_bytes_get_schema,
+	/* primitive getters */
+	NULL, /* get_boolean */
+	avro_generic_bytes_get,
+	avro_generic_bytes_grab,
+	NULL, /* get_double */
+	NULL, /* get_float */
+	NULL, /* get_int */
+	NULL, /* get_long */
+	NULL, /* get_null */
+	NULL, /* get_string */
+	NULL, /* grab_string */
+	NULL, /* get_enum */
+	NULL, /* get_fixed */
+	NULL, /* grab_fixed */
+	/* primitive setters */
+	NULL, /* set_boolean */
+	avro_generic_bytes_set,
+	avro_generic_bytes_give,
+	NULL, /* set_double */
+	NULL, /* set_float */
+	NULL, /* set_int */
+	NULL, /* set_long */
+	NULL, /* set_null */
+	NULL, /* set_string */
+	NULL, /* set_string_length */
+	NULL, /* give_string_length */
+	NULL, /* set_enum */
+	NULL, /* set_fixed */
+	NULL, /* give_fixed */
+	/* compound getters */
+	NULL, /* get_size */
+	NULL, /* get_by_index */
+	NULL, /* get_by_name */
+	NULL, /* get_discriminant */
+	NULL, /* get_current_branch */
+	/* compound setters */
+	NULL, /* append */
+	NULL, /* add */
+	NULL  /* set_branch */
+};
+
+avro_value_iface_t *avro_generic_bytes_class(void)
+{
+	return &AVRO_GENERIC_BYTES_CLASS;
+}
+
+int avro_generic_bytes_new(avro_value_t *value, void *buf, size_t size)
+{
+	int  rval;
+	check(rval, avro_value_new(&AVRO_GENERIC_BYTES_CLASS, value));
+	return avro_generic_bytes_set(value->iface, value->self, buf, size);
+}
+
+/*-----------------------------------------------------------------------
+ * double
+ */
+
+static size_t
+avro_generic_double_instance_size(const avro_value_iface_t *iface)
+{
+	AVRO_UNUSED(iface);
+	return sizeof(double);
+}
+
+static int
+avro_generic_double_init(const avro_value_iface_t *iface, void *vself)
+{
+	AVRO_UNUSED(iface);
+	double  *self = vself;
+	*self = 0.0;
+	return 0;
+}
+
+static void
+avro_generic_double_done(const avro_value_iface_t *iface, void *vself)
+{
+	AVRO_UNUSED(iface);
+	AVRO_UNUSED(vself);
+}
+
+static int
+avro_generic_double_reset(const avro_value_iface_t *iface, void *vself)
+{
+	AVRO_UNUSED(iface);
+	double  *self = vself;
+	*self = 0.0;
+	return 0;
+}
+
+static avro_type_t
+avro_generic_double_get_type(const avro_value_iface_t *iface, const void *vself)
+{
+	AVRO_UNUSED(iface);
+	AVRO_UNUSED(vself);
+	return AVRO_DOUBLE;
+}
+
+static avro_schema_t
+avro_generic_double_get_schema(const avro_value_iface_t *iface, const void *vself)
+{
+	AVRO_UNUSED(iface);
+	AVRO_UNUSED(vself);
+	return avro_schema_double();
+}
+
+static int
+avro_generic_double_get(const avro_value_iface_t *iface,
+			const void *vself, double *out)
+{
+	AVRO_UNUSED(iface);
+	const double  *self = vself;
+	*out = *self;
+	return 0;
+}
+
+static int
+avro_generic_double_set(const avro_value_iface_t *iface,
+			void *vself, double val)
+{
+	AVRO_UNUSED(iface);
+	double  *self = vself;
+	*self = val;
+	return 0;
+}
+
+static avro_value_iface_t  AVRO_GENERIC_DOUBLE_CLASS =
+{
+	/* "class" methods */
+	NULL, /* incref */
+	NULL, /* decref */
+	avro_generic_double_instance_size,
+	/* general "instance" methods */
+	avro_generic_double_init,
+	avro_generic_double_done,
+	avro_generic_double_reset,
+	avro_generic_double_get_type,
+	avro_generic_double_get_schema,
+	/* primitive getters */
+	NULL, /* get_boolean */
+	NULL, /* get_bytes */
+	NULL, /* grab_bytes */
+	avro_generic_double_get,
+	NULL, /* get_float */
+	NULL, /* get_int */
+	NULL, /* get_long */
+	NULL, /* get_null */
+	NULL, /* get_string */
+	NULL, /* grab_string */
+	NULL, /* get_enum */
+	NULL, /* get_fixed */
+	NULL, /* grab_fixed */
+	/* primitive setters */
+	NULL, /* set_boolean */
+	NULL, /* set_bytes */
+	NULL, /* give_bytes */
+	avro_generic_double_set,
+	NULL, /* set_float */
+	NULL, /* set_int */
+	NULL, /* set_long */
+	NULL, /* set_null */
+	NULL, /* set_string */
+	NULL, /* set_string_length */
+	NULL, /* give_string_length */
+	NULL, /* set_enum */
+	NULL, /* set_fixed */
+	NULL, /* give_fixed */
+	/* compound getters */
+	NULL, /* get_size */
+	NULL, /* get_by_index */
+	NULL, /* get_by_name */
+	NULL, /* get_discriminant */
+	NULL, /* get_current_branch */
+	/* compound setters */
+	NULL, /* append */
+	NULL, /* add */
+	NULL  /* set_branch */
+};
+
+avro_value_iface_t *avro_generic_double_class(void)
+{
+	return &AVRO_GENERIC_DOUBLE_CLASS;
+}
+
+int avro_generic_double_new(avro_value_t *value, double val)
+{
+	int  rval;
+	check(rval, avro_value_new(&AVRO_GENERIC_DOUBLE_CLASS, value));
+	return avro_generic_double_set(value->iface, value->self, val);
+}
+
+/*-----------------------------------------------------------------------
+ * float
+ */
+
+static size_t
+avro_generic_float_instance_size(const avro_value_iface_t *iface)
+{
+	AVRO_UNUSED(iface);
+	return sizeof(float);
+}
+
+static int
+avro_generic_float_init(const avro_value_iface_t *iface, void *vself)
+{
+	AVRO_UNUSED(iface);
+	float  *self = vself;
+	*self = 0.0f;
+	return 0;
+}
+
+static void
+avro_generic_float_done(const avro_value_iface_t *iface, void *vself)
+{
+	AVRO_UNUSED(iface);
+	AVRO_UNUSED(vself);
+}
+
+static int
+avro_generic_float_reset(const avro_value_iface_t *iface, void *vself)
+{
+	AVRO_UNUSED(iface);
+	float  *self = vself;
+	*self = 0.0f;
+	return 0;
+}
+
+static avro_type_t
+avro_generic_float_get_type(const avro_value_iface_t *iface, const void *vself)
+{
+	AVRO_UNUSED(iface);
+	AVRO_UNUSED(vself);
+	return AVRO_FLOAT;
+}
+
+static avro_schema_t
+avro_generic_float_get_schema(const avro_value_iface_t *iface, const void *vself)
+{
+	AVRO_UNUSED(iface);
+	AVRO_UNUSED(vself);
+	return avro_schema_float();
+}
+
+static int
+avro_generic_float_get(const avro_value_iface_t *iface,
+		       const void *vself, float *out)
+{
+	AVRO_UNUSED(iface);
+	const float  *self = vself;
+	*out = *self;
+	return 0;
+}
+
+static int
+avro_generic_float_set(const avro_value_iface_t *iface,
+		       void *vself, float val)
+{
+	AVRO_UNUSED(iface);
+	float  *self = vself;
+	*self = val;
+	return 0;
+}
+
+static avro_value_iface_t  AVRO_GENERIC_FLOAT_CLASS =
+{
+	/* "class" methods */
+	NULL, /* incref */
+	NULL, /* decref */
+	avro_generic_float_instance_size,
+	/* general "instance" methods */
+	avro_generic_float_init,
+	avro_generic_float_done,
+	avro_generic_float_reset,
+	avro_generic_float_get_type,
+	avro_generic_float_get_schema,
+	/* primitive getters */
+	NULL, /* get_boolean */
+	NULL, /* get_bytes */
+	NULL, /* grab_bytes */
+	NULL, /* get_double */
+	avro_generic_float_get,
+	NULL, /* get_int */
+	NULL, /* get_long */
+	NULL, /* get_null */
+	NULL, /* get_string */
+	NULL, /* grab_string */
+	NULL, /* get_enum */
+	NULL, /* get_fixed */
+	NULL, /* grab_fixed */
+	/* primitive setters */
+	NULL, /* set_boolean */
+	NULL, /* set_bytes */
+	NULL, /* give_bytes */
+	NULL, /* set_double */
+	avro_generic_float_set,
+	NULL, /* set_int */
+	NULL, /* set_long */
+	NULL, /* set_null */
+	NULL, /* set_string */
+	NULL, /* set_string_length */
+	NULL, /* give_string_length */
+	NULL, /* set_enum */
+	NULL, /* set_fixed */
+	NULL, /* give_fixed */
+	/* compound getters */
+	NULL, /* get_size */
+	NULL, /* get_by_index */
+	NULL, /* get_by_name */
+	NULL, /* get_discriminant */
+	NULL, /* get_current_branch */
+	/* compound setters */
+	NULL, /* append */
+	NULL, /* add */
+	NULL  /* set_branch */
+};
+
+avro_value_iface_t *avro_generic_float_class(void)
+{
+	return &AVRO_GENERIC_FLOAT_CLASS;
+}
+
+int avro_generic_float_new(avro_value_t *value, float val)
+{
+	int  rval;
+	check(rval, avro_value_new(&AVRO_GENERIC_FLOAT_CLASS, value));
+	return avro_generic_float_set(value->iface, value->self, val);
+}
+
+/*-----------------------------------------------------------------------
+ * int
+ */
+
+static size_t
+avro_generic_int_instance_size(const avro_value_iface_t *iface)
+{
+	AVRO_UNUSED(iface);
+	return sizeof(int32_t);
+}
+
+static int
+avro_generic_int_init(const avro_value_iface_t *iface, void *vself)
+{
+	AVRO_UNUSED(iface);
+	int32_t  *self = vself;
+	*self = 0;
+	return 0;
+}
+
+static void
+avro_generic_int_done(const avro_value_iface_t *iface, void *vself)
+{
+	AVRO_UNUSED(iface);
+	AVRO_UNUSED(vself);
+}
+
+static int
+avro_generic_int_reset(const avro_value_iface_t *iface, void *vself)
+{
+	AVRO_UNUSED(iface);
+	int32_t  *self = vself;
+	*self = 0;
+	return 0;
+}
+
+static avro_type_t
+avro_generic_int_get_type(const avro_value_iface_t *iface, const void *vself)
+{
+	AVRO_UNUSED(iface);
+	AVRO_UNUSED(vself);
+	return AVRO_INT32;
+}
+
+static avro_schema_t
+avro_generic_int_get_schema(const avro_value_iface_t *iface, const void *vself)
+{
+	AVRO_UNUSED(iface);
+	AVRO_UNUSED(vself);
+	return avro_schema_int();
+}
+
+static int
+avro_generic_int_get(const avro_value_iface_t *iface,
+		     const void *vself, int32_t *out)
+{
+	AVRO_UNUSED(iface);
+	const int32_t  *self = vself;
+	*out = *self;
+	return 0;
+}
+
+static int
+avro_generic_int_set(const avro_value_iface_t *iface,
+		     void *vself, int32_t val)
+{
+	AVRO_UNUSED(iface);
+	int32_t  *self = vself;
+	*self = val;
+	return 0;
+}
+
+static avro_value_iface_t  AVRO_GENERIC_INT_CLASS =
+{
+	/* "class" methods */
+	NULL, /* incref */
+	NULL, /* decref */
+	avro_generic_int_instance_size,
+	/* general "instance" methods */
+	avro_generic_int_init,
+	avro_generic_int_done,
+	avro_generic_int_reset,
+	avro_generic_int_get_type,
+	avro_generic_int_get_schema,
+	/* primitive getters */
+	NULL, /* get_boolean */
+	NULL, /* get_bytes */
+	NULL, /* grab_bytes */
+	NULL, /* get_double */
+	NULL, /* get_float */
+	avro_generic_int_get,
+	NULL, /* get_long */
+	NULL, /* get_null */
+	NULL, /* get_string */
+	NULL, /* grab_string */
+	NULL, /* get_enum */
+	NULL, /* get_fixed */
+	NULL, /* grab_fixed */
+	/* primitive setters */
+	NULL, /* set_boolean */
+	NULL, /* set_bytes */
+	NULL, /* give_bytes */
+	NULL, /* set_double */
+	NULL, /* set_float */
+	avro_generic_int_set,
+	NULL, /* set_long */
+	NULL, /* set_null */
+	NULL, /* set_string */
+	NULL, /* set_string_length */
+	NULL, /* give_string_length */
+	NULL, /* set_enum */
+	NULL, /* set_fixed */
+	NULL, /* give_fixed */
+	/* compound getters */
+	NULL, /* get_size */
+	NULL, /* get_by_index */
+	NULL, /* get_by_name */
+	NULL, /* get_discriminant */
+	NULL, /* get_current_branch */
+	/* compound setters */
+	NULL, /* append */
+	NULL, /* add */
+	NULL  /* set_branch */
+};
+
+avro_value_iface_t *avro_generic_int_class(void)
+{
+	return &AVRO_GENERIC_INT_CLASS;
+}
+
+int avro_generic_int_new(avro_value_t *value, int32_t val)
+{
+	int  rval;
+	check(rval, avro_value_new(&AVRO_GENERIC_INT_CLASS, value));
+	return avro_generic_int_set(value->iface, value->self, val);
+}
+
+/*-----------------------------------------------------------------------
+ * long
+ */
+
+static size_t
+avro_generic_long_instance_size(const avro_value_iface_t *iface)
+{
+	AVRO_UNUSED(iface);
+	return sizeof(int64_t);
+}
+
+static int
+avro_generic_long_init(const avro_value_iface_t *iface, void *vself)
+{
+	AVRO_UNUSED(iface);
+	int64_t  *self = vself;
+	*self = 0;
+	return 0;
+}
+
+static void
+avro_generic_long_done(const avro_value_iface_t *iface, void *vself)
+{
+	AVRO_UNUSED(iface);
+	AVRO_UNUSED(vself);
+}
+
+static int
+avro_generic_long_reset(const avro_value_iface_t *iface, void *vself)
+{
+	AVRO_UNUSED(iface);
+	int64_t  *self = vself;
+	*self = 0;
+	return 0;
+}
+
+static avro_type_t
+avro_generic_long_get_type(const avro_value_iface_t *iface, const void *vself)
+{
+	AVRO_UNUSED(iface);
+	AVRO_UNUSED(vself);
+	return AVRO_INT64;
+}
+
+static avro_schema_t
+avro_generic_long_get_schema(const avro_value_iface_t *iface, const void *vself)
+{
+	AVRO_UNUSED(iface);
+	AVRO_UNUSED(vself);
+	return avro_schema_long();
+}
+
+static int
+avro_generic_long_get(const avro_value_iface_t *iface,
+		      const void *vself, int64_t *out)
+{
+	AVRO_UNUSED(iface);
+	const int64_t  *self = vself;
+	*out = *self;
+	return 0;
+}
+
+static int
+avro_generic_long_set(const avro_value_iface_t *iface,
+		      void *vself, int64_t val)
+{
+	AVRO_UNUSED(iface);
+	int64_t  *self = vself;
+	*self = val;
+	return 0;
+}
+
+static avro_value_iface_t  AVRO_GENERIC_LONG_CLASS =
+{
+	/* "class" methods */
+	NULL, /* incref */
+	NULL, /* decref */
+	avro_generic_long_instance_size,
+	/* general "instance" methods */
+	avro_generic_long_init,
+	avro_generic_long_done,
+	avro_generic_long_reset,
+	avro_generic_long_get_type,
+	avro_generic_long_get_schema,
+	/* primitive getters */
+	NULL, /* get_boolean */
+	NULL, /* get_bytes */
+	NULL, /* grab_bytes */
+	NULL, /* get_double */
+	NULL, /* get_float */
+	NULL, /* get_int */
+	avro_generic_long_get,
+	NULL, /* get_null */
+	NULL, /* get_string */
+	NULL, /* grab_string */
+	NULL, /* get_enum */
+	NULL, /* get_fixed */
+	NULL, /* grab_fixed */
+	/* primitive setters */
+	NULL, /* set_boolean */
+	NULL, /* set_bytes */
+	NULL, /* give_bytes */
+	NULL, /* set_double */
+	NULL, /* set_float */
+	NULL, /* set_int */
+	avro_generic_long_set,
+	NULL, /* set_null */
+	NULL, /* set_string */
+	NULL, /* set_string_length */
+	NULL, /* give_string_length */
+	NULL, /* set_enum */
+	NULL, /* set_fixed */
+	NULL, /* give_fixed */
+	/* compound getters */
+	NULL, /* get_size */
+	NULL, /* get_by_index */
+	NULL, /* get_by_name */
+	NULL, /* get_discriminant */
+	NULL, /* get_current_branch */
+	/* compound setters */
+	NULL, /* append */
+	NULL, /* add */
+	NULL  /* set_branch */
+};
+
+avro_value_iface_t *avro_generic_long_class(void)
+{
+	return &AVRO_GENERIC_LONG_CLASS;
+}
+
+int avro_generic_long_new(avro_value_t *value, int64_t val)
+{
+	int  rval;
+	check(rval, avro_value_new(&AVRO_GENERIC_LONG_CLASS, value));
+	return avro_generic_long_set(value->iface, value->self, val);
+}
+
+/*-----------------------------------------------------------------------
+ * null
+ */
+
+static size_t
+avro_generic_null_instance_size(const avro_value_iface_t *iface)
+{
+	AVRO_UNUSED(iface);
+	return sizeof(int);
+}
+
+static int
+avro_generic_null_init(const avro_value_iface_t *iface, void *vself)
+{
+	AVRO_UNUSED(iface);
+	int  *self = vself;
+	*self = 0;
+	return 0;
+}
+
+static void
+avro_generic_null_done(const avro_value_iface_t *iface, void *vself)
+{
+	AVRO_UNUSED(iface);
+	AVRO_UNUSED(vself);
+}
+
+static int
+avro_generic_null_reset(const avro_value_iface_t *iface, void *vself)
+{
+	AVRO_UNUSED(iface);
+	int  *self = vself;
+	*self = 0;
+	return 0;
+}
+
+static avro_type_t
+avro_generic_null_get_type(const avro_value_iface_t *iface, const void *vself)
+{
+	AVRO_UNUSED(iface);
+	AVRO_UNUSED(vself);
+	return AVRO_NULL;
+}
+
+static avro_schema_t
+avro_generic_null_get_schema(const avro_value_iface_t *iface, const void *vself)
+{
+	AVRO_UNUSED(iface);
+	AVRO_UNUSED(vself);
+	return avro_schema_null();
+}
+
+static int
+avro_generic_null_get(const avro_value_iface_t *iface, const void *vself)
+{
+	AVRO_UNUSED(iface);
+	AVRO_UNUSED(vself);
+	return 0;
+}
+
+static int
+avro_generic_null_set(const avro_value_iface_t *iface, void *vself)
+{
+	AVRO_UNUSED(iface);
+	AVRO_UNUSED(vself);
+	return 0;
+}
+
+static avro_value_iface_t  AVRO_GENERIC_NULL_CLASS =
+{
+	/* "class" methods */
+	NULL, /* incref */
+	NULL, /* decref */
+	avro_generic_null_instance_size,
+	/* general "instance" methods */
+	avro_generic_null_init,
+	avro_generic_null_done,
+	avro_generic_null_reset,
+	avro_generic_null_get_type,
+	avro_generic_null_get_schema,
+	/* primitive getters */
+	NULL, /* get_boolean */
+	NULL, /* get_bytes */
+	NULL, /* grab_bytes */
+	NULL, /* get_double */
+	NULL, /* get_float */
+	NULL, /* get_int */
+	NULL, /* get_long */
+	avro_generic_null_get,
+	NULL, /* get_string */
+	NULL, /* grab_string */
+	NULL, /* get_enum */
+	NULL, /* get_fixed */
+	NULL, /* grab_fixed */
+	/* primitive setters */
+	NULL, /* set_boolean */
+	NULL, /* set_bytes */
+	NULL, /* give_bytes */
+	NULL, /* set_double */
+	NULL, /* set_float */
+	NULL, /* set_int */
+	NULL, /* set_long */
+	avro_generic_null_set,
+	NULL, /* set_string */
+	NULL, /* set_string_length */
+	NULL, /* give_string_length */
+	NULL, /* set_enum */
+	NULL, /* set_fixed */
+	NULL, /* give_fixed */
+	/* compound getters */
+	NULL, /* get_size */
+	NULL, /* get_by_index */
+	NULL, /* get_by_name */
+	NULL, /* get_discriminant */
+	NULL, /* get_current_branch */
+	/* compound setters */
+	NULL, /* append */
+	NULL, /* add */
+	NULL  /* set_branch */
+};
+
+avro_value_iface_t *avro_generic_null_class(void)
+{
+	return &AVRO_GENERIC_NULL_CLASS;
+}
+
+int avro_generic_null_new(avro_value_t *value)
+{
+	return avro_value_new(&AVRO_GENERIC_NULL_CLASS, value);
+}
+
+/*-----------------------------------------------------------------------
+ * string
+ */
+
+static size_t
+avro_generic_string_instance_size(const avro_value_iface_t *iface)
+{
+	AVRO_UNUSED(iface);
+	return sizeof(avro_raw_string_t);
+}
+
+static int
+avro_generic_string_init(const avro_value_iface_t *iface, void *vself)
+{
+	AVRO_UNUSED(iface);
+	avro_raw_string_t  *self = vself;
+	avro_raw_string_init(self);
+	return 0;
+}
+
+static void
+avro_generic_string_done(const avro_value_iface_t *iface, void *vself)
+{
+	AVRO_UNUSED(iface);
+	avro_raw_string_t  *self = vself;
+	avro_raw_string_done(self);
+}
+
+static int
+avro_generic_string_reset(const avro_value_iface_t *iface, void *vself)
+{
+	AVRO_UNUSED(iface);
+	avro_raw_string_t  *self = vself;
+	avro_raw_string_clear(self);
+	return 0;
+}
+
+static avro_type_t
+avro_generic_string_get_type(const avro_value_iface_t *iface, const void *vself)
+{
+	AVRO_UNUSED(iface);
+	AVRO_UNUSED(vself);
+	return AVRO_STRING;
+}
+
+static avro_schema_t
+avro_generic_string_get_schema(const avro_value_iface_t *iface, const void *vself)
+{
+	AVRO_UNUSED(iface);
+	AVRO_UNUSED(vself);
+	return avro_schema_string();
+}
+
+static int
+avro_generic_string_get(const avro_value_iface_t *iface,
+			const void *vself, const char **str, size_t *size)
+{
+	AVRO_UNUSED(iface);
+	const avro_raw_string_t  *self = vself;
+	const char  *contents = avro_raw_string_get(self);
+
+	if (str != NULL) {
+		/*
+		 * We can't return a NULL string, we have to return an
+		 * *empty* string
+		 */
+
+		*str = (contents == NULL)? "": contents;
+	}
+	if (size != NULL) {
+		/* raw_string's length includes the NUL terminator,
+		 * unless it's empty */
+		*size = (contents == NULL)? 1: avro_raw_string_length(self);
+	}
+	return 0;
+}
+
+static int
+avro_generic_string_grab(const avro_value_iface_t *iface,
+			 const void *vself, avro_wrapped_buffer_t *dest)
+{
+	AVRO_UNUSED(iface);
+	const avro_raw_string_t  *self = vself;
+	const char  *contents = avro_raw_string_get(self);
+
+	if (contents == NULL) {
+		return avro_wrapped_buffer_new(dest, "", 1);
+	} else {
+		return avro_raw_string_grab(self, dest);
+	}
+}
+
+static int
+avro_generic_string_set(const avro_value_iface_t *iface,
+			void *vself, char *val)
+{
+	AVRO_UNUSED(iface);
+	check_param(EINVAL, val != NULL, "string contents");
+
+	/*
+	 * This raw_string method ensures that we copy the NUL
+	 * terminator from val, and will include the NUL terminator in
+	 * the raw_string's length, which is what we want.
+	 */
+	avro_raw_string_t  *self = vself;
+	avro_raw_string_set(self, val);
+	return 0;
+}
+
+static int
+avro_generic_string_set_length(const avro_value_iface_t *iface,
+			       void *vself, char *val, size_t size)
+{
+	AVRO_UNUSED(iface);
+	check_param(EINVAL, val != NULL, "string contents");
+	avro_raw_string_t  *self = vself;
+	avro_raw_string_set_length(self, val, size);
+	return 0;
+}
+
+static int
+avro_generic_string_give_length(const avro_value_iface_t *iface,
+				void *vself, avro_wrapped_buffer_t *buf)
+{
+	AVRO_UNUSED(iface);
+	avro_raw_string_t  *self = vself;
+	avro_raw_string_give(self, buf);
+	return 0;
+}
+
+static avro_value_iface_t  AVRO_GENERIC_STRING_CLASS =
+{
+	/* "class" methods */
+	NULL, /* incref */
+	NULL, /* decref */
+	avro_generic_string_instance_size,
+	/* general "instance" methods */
+	avro_generic_string_init,
+	avro_generic_string_done,
+	avro_generic_string_reset,
+	avro_generic_string_get_type,
+	avro_generic_string_get_schema,
+	/* primitive getters */
+	NULL, /* get_boolean */
+	NULL, /* get_bytes */
+	NULL, /* grab_bytes */
+	NULL, /* get_double */
+	NULL, /* get_float */
+	NULL, /* get_int */
+	NULL, /* get_long */
+	NULL, /* get_null */
+	avro_generic_string_get,
+	avro_generic_string_grab,
+	NULL, /* get_enum */
+	NULL, /* get_fixed */
+	NULL, /* grab_fixed */
+	/* primitive setters */
+	NULL, /* set_boolean */
+	NULL, /* set_bytes */
+	NULL, /* give_bytes */
+	NULL, /* set_double */
+	NULL, /* set_float */
+	NULL, /* set_int */
+	NULL, /* set_long */
+	NULL, /* set_null */
+	avro_generic_string_set,
+	avro_generic_string_set_length,
+	avro_generic_string_give_length,
+	NULL, /* set_enum */
+	NULL, /* set_fixed */
+	NULL, /* give_fixed */
+	/* compound getters */
+	NULL, /* get_size */
+	NULL, /* get_by_index */
+	NULL, /* get_by_name */
+	NULL, /* get_discriminant */
+	NULL, /* get_current_branch */
+	/* compound setters */
+	NULL, /* append */
+	NULL, /* add */
+	NULL  /* set_branch */
+};
+
+avro_value_iface_t *avro_generic_string_class(void)
+{
+	return &AVRO_GENERIC_STRING_CLASS;
+}
+
+int avro_generic_string_new(avro_value_t *value, char *str)
+{
+	int  rval;
+	check(rval, avro_value_new(&AVRO_GENERIC_STRING_CLASS, value));
+	return avro_generic_string_set(value->iface, value->self, str);
+}
+
+int avro_generic_string_new_length(avro_value_t *value, char *str, size_t size)
+{
+	int  rval;
+	check(rval, avro_value_new(&AVRO_GENERIC_STRING_CLASS, value));
+	return avro_generic_string_set_length(value->iface, value->self, str, size);
+}

Added: avro/trunk/lang/c/src/generic-record.c
URL: http://svn.apache.org/viewvc/avro/trunk/lang/c/src/generic-record.c?rev=1146546&view=auto
==============================================================================
--- avro/trunk/lang/c/src/generic-record.c (added)
+++ avro/trunk/lang/c/src/generic-record.c Thu Jul 14 02:35:04 2011
@@ -0,0 +1,396 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to you under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+ * implied.  See the License for the specific language governing
+ * permissions and limitations under the License.
+ */
+
+#include <errno.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "avro/allocation.h"
+#include "avro/data.h"
+#include "avro/errors.h"
+#include "avro/generic.h"
+#include "avro/refcount.h"
+#include "avro/schema.h"
+#include "avro/value.h"
+#include "avro_private.h"
+
+
+#ifndef DEBUG_FIELD_OFFSETS
+#define DEBUG_FIELD_OFFSETS 0
+#endif
+
+
+/*
+ * For generic records, we need to store the value implementation for
+ * each field.  We also need to store an offset for each field, since
+ * we're going to store the contents of each field directly in the
+ * record, rather than via pointers.
+ */
+
+typedef struct avro_generic_record_value_iface {
+	avro_value_iface_t  iface;
+
+	/** The reference count for this interface. */
+	volatile int  refcount;
+
+	/** The schema for this record. */
+	avro_schema_t  schema;
+
+	/** The total size of each value struct for this record. */
+	size_t  instance_size;
+
+	/** The number of fields in this record.  Yes, we could get this
+	 * from schema, but this is easier. */
+	size_t  field_count;
+
+	/** The offset of each field within the record struct. */
+	size_t  *field_offsets;
+
+	/** The value implementation for each field. */
+	avro_value_iface_t  **field_ifaces;
+} avro_generic_record_value_iface_t;
+
+typedef struct avro_generic_record {
+	/* The rest of the struct is taken up by the inline storage
+	 * needed for each field. */
+} avro_generic_record_t;
+
+
+/** Return a pointer to the given field within a record struct. */
+#define avro_generic_record_field(iface, rec, index) \
+	(((void *) (rec)) + (iface)->field_offsets[(index)])
+
+
+static avro_value_iface_t *
+avro_generic_record_incref(avro_value_iface_t *viface)
+{
+	avro_generic_record_value_iface_t  *iface =
+	    (avro_generic_record_value_iface_t *) viface;
+	avro_refcount_inc(&iface->refcount);
+	return viface;
+}
+
+static void
+avro_generic_record_decref(avro_value_iface_t *viface)
+{
+	avro_generic_record_value_iface_t  *iface =
+	    (avro_generic_record_value_iface_t *) viface;
+
+	if (avro_refcount_dec(&iface->refcount)) {
+		size_t  i;
+		for (i = 0; i < iface->field_count; i++) {
+			avro_value_iface_decref(iface->field_ifaces[i]);
+		}
+
+		avro_schema_decref(iface->schema);
+		avro_free(iface->field_offsets,
+			  sizeof(size_t) * iface->field_count);
+		avro_free(iface->field_ifaces,
+			  sizeof(avro_value_iface_t *) * iface->field_count);
+
+		avro_freet(avro_generic_record_value_iface_t, iface);
+	}
+}
+
+static size_t
+avro_generic_record_instance_size(const avro_value_iface_t *viface)
+{
+	const avro_generic_record_value_iface_t  *iface =
+	    (avro_generic_record_value_iface_t *) viface;
+	return iface->instance_size;
+}
+
+static int
+avro_generic_record_init(const avro_value_iface_t *viface, void *vself)
+{
+	int  rval;
+	const avro_generic_record_value_iface_t  *iface =
+	    (const avro_generic_record_value_iface_t *) viface;
+	avro_generic_record_t  *self = vself;
+
+	/* Initialize each field */
+	size_t  i;
+	for (i = 0; i < iface->field_count; i++) {
+		check(rval, avro_value_init
+		      (iface->field_ifaces[i],
+		       avro_generic_record_field(iface, self, i)));
+	}
+
+	return 0;
+}
+
+static void
+avro_generic_record_done(const avro_value_iface_t *viface, void *vself)
+{
+	const avro_generic_record_value_iface_t  *iface =
+	    (const avro_generic_record_value_iface_t *) viface;
+	avro_generic_record_t  *self = vself;
+	size_t  i;
+	for (i = 0; i < iface->field_count; i++) {
+		avro_value_t  value = {
+			iface->field_ifaces[i],
+			avro_generic_record_field(iface, self, i)
+		};
+		avro_value_done(&value);
+	}
+}
+
+static int
+avro_generic_record_reset(const avro_value_iface_t *viface, void *vself)
+{
+	const avro_generic_record_value_iface_t  *iface =
+	    (const avro_generic_record_value_iface_t *) viface;
+	int  rval;
+	avro_generic_record_t  *self = vself;
+	size_t  i;
+	for (i = 0; i < iface->field_count; i++) {
+		avro_value_t  value = {
+			iface->field_ifaces[i],
+			avro_generic_record_field(iface, self, i)
+		};
+		check(rval, avro_value_reset(&value));
+	}
+	return 0;
+}
+
+static avro_type_t
+avro_generic_record_get_type(const avro_value_iface_t *viface, const void *vself)
+{
+	AVRO_UNUSED(viface);
+	AVRO_UNUSED(vself);
+	return AVRO_RECORD;
+}
+
+static avro_schema_t
+avro_generic_record_get_schema(const avro_value_iface_t *viface, const void *vself)
+{
+	const avro_generic_record_value_iface_t  *iface =
+	    (const avro_generic_record_value_iface_t *) viface;
+	AVRO_UNUSED(vself);
+	return iface->schema;
+}
+
+static int
+avro_generic_record_get_size(const avro_value_iface_t *viface,
+			     const void *vself, size_t *size)
+{
+	const avro_generic_record_value_iface_t  *iface =
+	    (const avro_generic_record_value_iface_t *) viface;
+	AVRO_UNUSED(vself);
+	if (size != NULL) {
+		*size = iface->field_count;
+	}
+	return 0;
+}
+
+static int
+avro_generic_record_get_by_index(const avro_value_iface_t *viface,
+				 const void *vself, size_t index,
+				 avro_value_t *child, const char **name)
+{
+	const avro_generic_record_value_iface_t  *iface =
+	    (const avro_generic_record_value_iface_t *) viface;
+	const avro_generic_record_t  *self = vself;
+	if (index >= iface->field_count) {
+		avro_set_error("Field index %zu out of range", index);
+		return EINVAL;
+	}
+	child->iface = iface->field_ifaces[index];
+	child->self = avro_generic_record_field(iface, self, index);
+
+	/*
+	 * Grab the field name from the schema if asked for.
+	 */
+	if (name != NULL) {
+		avro_schema_t  schema = iface->schema;
+		*name = avro_schema_record_field_name(schema, index);
+	}
+
+	return 0;
+}
+
+static int
+avro_generic_record_get_by_name(const avro_value_iface_t *viface,
+				const void *vself, const char *name,
+				avro_value_t *child, size_t *index_out)
+{
+	const avro_generic_record_value_iface_t  *iface =
+	    (const avro_generic_record_value_iface_t *) viface;
+	const avro_generic_record_t  *self = vself;
+
+	avro_schema_t  schema = iface->schema;
+	int  index = avro_schema_record_field_get_index(schema, name);
+	if (index < 0) {
+		avro_set_error("Unknown record field %s", name);
+		return EINVAL;
+	}
+
+	child->iface = iface->field_ifaces[index];
+	child->self = avro_generic_record_field(iface, self, index);
+	if (index_out != NULL) {
+		*index_out = index;
+	}
+	return 0;
+}
+
+static avro_value_iface_t  AVRO_GENERIC_RECORD_CLASS =
+{
+	/* "class" methods */
+	avro_generic_record_incref,
+	avro_generic_record_decref,
+	avro_generic_record_instance_size,
+	/* general "instance" methods */
+	avro_generic_record_init,
+	avro_generic_record_done,
+	avro_generic_record_reset,
+	avro_generic_record_get_type,
+	avro_generic_record_get_schema,
+	/* primitive getters */
+	NULL, /* get_boolean */
+	NULL, /* get_bytes */
+	NULL, /* grab_bytes */
+	NULL, /* get_double */
+	NULL, /* get_float */
+	NULL, /* get_int */
+	NULL, /* get_long */
+	NULL, /* get_null */
+	NULL, /* get_string */
+	NULL, /* grab_string */
+	NULL, /* get_enum */
+	NULL, /* get_fixed */
+	NULL, /* grab_fixed */
+	/* primitive setters */
+	NULL, /* set_boolean */
+	NULL, /* set_bytes */
+	NULL, /* give_bytes */
+	NULL, /* set_double */
+	NULL, /* set_float */
+	NULL, /* set_int */
+	NULL, /* set_long */
+	NULL, /* set_null */
+	NULL, /* set_string */
+	NULL, /* set_string_length */
+	NULL, /* give_string_length */
+	NULL, /* set_enum */
+	NULL, /* set_fixed */
+	NULL, /* give_fixed */
+	/* compound getters */
+	avro_generic_record_get_size,
+	avro_generic_record_get_by_index,
+	avro_generic_record_get_by_name,
+	NULL, /* get_discriminant */
+	NULL, /* get_current_branch */
+	/* compound setters */
+	NULL, /* append */
+	NULL, /* add */
+	NULL  /* set_branch */
+};
+
+avro_value_iface_t *
+avro_generic_record_class(avro_schema_t schema,
+			  avro_value_iface_creator_t creator,
+			  void *user_data)
+{
+	if (!is_avro_record(schema)) {
+		avro_set_error("Expected record schema");
+		return NULL;
+	}
+
+	avro_generic_record_value_iface_t  *iface =
+		avro_new(avro_generic_record_value_iface_t);
+	if (iface == NULL) {
+		return NULL;
+	}
+
+	memset(iface, 0, sizeof(avro_generic_record_value_iface_t));
+	memcpy(&iface->iface, &AVRO_GENERIC_RECORD_CLASS,
+	       sizeof(avro_value_iface_t));
+	iface->refcount = 1;
+	iface->schema = avro_schema_incref(schema);
+
+	iface->field_count = avro_schema_record_size(schema);
+	size_t  field_offsets_size =
+		sizeof(size_t) * iface->field_count;
+	size_t  field_ifaces_size =
+		sizeof(avro_value_iface_t *) * iface->field_count;
+
+	iface->field_offsets = avro_malloc(field_offsets_size);
+	if (iface->field_offsets == NULL) {
+		goto error;
+	}
+
+	iface->field_ifaces = avro_malloc(field_ifaces_size);
+	if (iface->field_ifaces == NULL) {
+		goto error;
+	}
+
+	size_t  next_offset = sizeof(avro_generic_record_t);
+#if DEBUG_FIELD_OFFSETS
+	fprintf(stderr, "  Record %s\n  Header: Offset 0, size %zu\n",
+		avro_schema_type_name(schema),
+		sizeof(avro_generic_record_t));
+#endif
+	size_t  i;
+	for (i = 0; i < iface->field_count; i++) {
+		avro_schema_t  field_schema =
+		    avro_schema_record_field_get_by_index(schema, i);
+
+		iface->field_offsets[i] = next_offset;
+
+		iface->field_ifaces[i] = creator(field_schema, user_data);
+		if (iface->field_ifaces[i] == NULL) {
+			goto error;
+		}
+
+		size_t  field_size =
+		    avro_value_instance_size(iface->field_ifaces[i]);
+		if (field_size == 0) {
+			avro_set_error("Record field class must provide instance_size");
+			goto error;
+		}
+
+#if DEBUG_FIELD_OFFSETS
+		fprintf(stderr, "  Field %zu (%s): Offset %zu, size %zu\n",
+			i, avro_schema_type_name(field_schema),
+			next_offset, field_size);
+#endif
+		next_offset += field_size;
+	}
+
+	iface->instance_size = next_offset;
+#if DEBUG_FIELD_OFFSETS
+	fprintf(stderr, "  TOTAL SIZE: %zu\n", next_offset);
+#endif
+
+	return &iface->iface;
+
+error:
+	avro_schema_decref(iface->schema);
+	if (iface->field_offsets != NULL) {
+		avro_free(iface->field_offsets, field_offsets_size);
+	}
+	if (iface->field_ifaces != NULL) {
+		for (i = 0; i < iface->field_count; i++) {
+			if (iface->field_ifaces[i] != NULL) {
+				avro_value_iface_decref(iface->field_ifaces[i]);
+			}
+		}
+		avro_free(iface->field_ifaces, field_ifaces_size);
+	}
+	avro_freet(avro_generic_record_value_iface_t, iface);
+	return NULL;
+}

Added: avro/trunk/lang/c/src/generic-union.c
URL: http://svn.apache.org/viewvc/avro/trunk/lang/c/src/generic-union.c?rev=1146546&view=auto
==============================================================================
--- avro/trunk/lang/c/src/generic-union.c (added)
+++ avro/trunk/lang/c/src/generic-union.c Thu Jul 14 02:35:04 2011
@@ -0,0 +1,398 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to you under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+ * implied.  See the License for the specific language governing
+ * permissions and limitations under the License.
+ */
+
+#include <errno.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "avro/allocation.h"
+#include "avro/data.h"
+#include "avro/errors.h"
+#include "avro/generic.h"
+#include "avro/refcount.h"
+#include "avro/schema.h"
+#include "avro/value.h"
+#include "avro_private.h"
+
+
+#ifndef DEBUG_BRANCHES
+#define DEBUG_BRANCHES 0
+#endif
+
+
+/*
+ * For generic unions, we need to store the value implementation for
+ * each branch, just like for generic records.  However, for unions, we
+ * can only have one branch active at a time, so we can reuse the space
+ * in the union struct, just like is done with C unions.
+ */
+
+typedef struct avro_generic_union_value_iface {
+	avro_value_iface_t  iface;
+
+	/** The reference count for this interface. */
+	volatile int  refcount;
+
+	/** The schema for this union. */
+	avro_schema_t  schema;
+
+	/** The total size of each value struct for this union. */
+	size_t  instance_size;
+
+	/** The number of branches in this union.  Yes, we could get
+	 * this from schema, but this is easier. */
+	size_t  branch_count;
+
+	/** The value implementation for each branch. */
+	avro_value_iface_t  **branch_ifaces;
+} avro_generic_union_value_iface_t;
+
+typedef struct avro_generic_union {
+	/** The currently active branch of the union.  -1 if no branch
+	 * is selected. */
+	int  discriminant;
+
+	/* The rest of the struct is taken up by the inline storage
+	 * needed for the active branch. */
+} avro_generic_union_t;
+
+
+/** Return the child interface for the active branch. */
+#define avro_generic_union_branch_iface(iface, _union) \
+	((iface)->branch_ifaces[(_union)->discriminant])
+
+/** Return a pointer to the active branch within a union struct. */
+#define avro_generic_union_branch(_union) \
+	(((void *) (_union)) + sizeof(avro_generic_union_t))
+
+
+static avro_value_iface_t *
+avro_generic_union_incref(avro_value_iface_t *viface)
+{
+	avro_generic_union_value_iface_t  *iface =
+	    (avro_generic_union_value_iface_t *) viface;
+	avro_refcount_inc(&iface->refcount);
+	return viface;
+}
+
+static void
+avro_generic_union_decref(avro_value_iface_t *viface)
+{
+	avro_generic_union_value_iface_t  *iface =
+	    (avro_generic_union_value_iface_t *) viface;
+
+	if (avro_refcount_dec(&iface->refcount)) {
+		size_t  i;
+		for (i = 0; i < iface->branch_count; i++) {
+			avro_value_iface_decref(iface->branch_ifaces[i]);
+		}
+
+		avro_schema_decref(iface->schema);
+		avro_free(iface->branch_ifaces,
+			  sizeof(avro_value_iface_t *) * iface->branch_count);
+
+		avro_freet(avro_generic_union_value_iface_t, iface);
+	}
+}
+
+static size_t
+avro_generic_union_instance_size(const avro_value_iface_t *viface)
+{
+	const avro_generic_union_value_iface_t  *iface =
+	    (const avro_generic_union_value_iface_t *) viface;
+	return iface->instance_size;
+}
+
+static int
+avro_generic_union_init(const avro_value_iface_t *viface, void *vself)
+{
+	AVRO_UNUSED(viface);
+	avro_generic_union_t  *self = vself;
+	self->discriminant = -1;
+	return 0;
+}
+
+static void
+avro_generic_union_done(const avro_value_iface_t *viface, void *vself)
+{
+	const avro_generic_union_value_iface_t  *iface =
+	    (const avro_generic_union_value_iface_t *) viface;
+	avro_generic_union_t  *self = vself;
+	if (self->discriminant >= 0) {
+#if DEBUG_BRANCHES
+		fprintf(stderr, "Finalizing branch %d\n",
+			self->discriminant);
+#endif
+		avro_value_t  value = {
+			avro_generic_union_branch_iface(iface, self),
+			avro_generic_union_branch(self)
+		};
+		avro_value_done(&value);
+		self->discriminant = -1;
+	}
+}
+
+static int
+avro_generic_union_reset(const avro_value_iface_t *viface, void *vself)
+{
+	const avro_generic_union_value_iface_t  *iface =
+	    (const avro_generic_union_value_iface_t *) viface;
+	avro_generic_union_t  *self = vself;
+	/* Keep the same branch selected, for the common case that we're
+	 * about to reuse it. */
+	if (self->discriminant >= 0) {
+#if DEBUG_BRANCHES
+		fprintf(stderr, "Resetting branch %d\n",
+			self->discriminant);
+#endif
+		avro_value_t  value = {
+			avro_generic_union_branch_iface(iface, self),
+			avro_generic_union_branch(self)
+		};
+		return avro_value_reset(&value);
+	}
+	return 0;
+}
+
+static avro_type_t
+avro_generic_union_get_type(const avro_value_iface_t *viface, const void *vself)
+{
+	AVRO_UNUSED(viface);
+	AVRO_UNUSED(vself);
+	return AVRO_UNION;
+}
+
+static avro_schema_t
+avro_generic_union_get_schema(const avro_value_iface_t *viface, const void *vself)
+{
+	const avro_generic_union_value_iface_t  *iface =
+	    (const avro_generic_union_value_iface_t *) viface;
+	AVRO_UNUSED(vself);
+	return iface->schema;
+}
+
+static int
+avro_generic_union_get_discriminant(const avro_value_iface_t *viface,
+				    const void *vself, int *out)
+{
+	AVRO_UNUSED(viface);
+	const avro_generic_union_t  *self = vself;
+	*out = self->discriminant;
+	return 0;
+}
+
+static int
+avro_generic_union_get_current_branch(const avro_value_iface_t *viface,
+				      const void *vself, avro_value_t *branch)
+{
+	const avro_generic_union_value_iface_t  *iface =
+	    (const avro_generic_union_value_iface_t *) viface;
+	const avro_generic_union_t  *self = vself;
+	if (self->discriminant < 0) {
+		avro_set_error("Union has no selected branch");
+		return EINVAL;
+	}
+	branch->iface = avro_generic_union_branch_iface(iface, self);
+	branch->self = avro_generic_union_branch(self);
+	return 0;
+}
+
+static int
+avro_generic_union_set_branch(const avro_value_iface_t *viface,
+			      void *vself, int discriminant,
+			      avro_value_t *branch)
+{
+	const avro_generic_union_value_iface_t  *iface =
+	    (const avro_generic_union_value_iface_t *) viface;
+	int  rval;
+	avro_generic_union_t  *self = vself;
+
+#if DEBUG_BRANCHES
+	fprintf(stderr, "Selecting branch %d (was %d)\n",
+		discriminant, self->discriminant);
+#endif
+
+	/*
+	 * If the new desired branch is different than the currently
+	 * active one, then finalize the old branch and initialize the
+	 * new one.
+	 */
+	if (self->discriminant != discriminant) {
+		if (self->discriminant >= 0) {
+#if DEBUG_BRANCHES
+			fprintf(stderr, "Finalizing branch %d\n",
+				self->discriminant);
+#endif
+			avro_value_t  value = {
+				avro_generic_union_branch_iface(iface, self),
+				avro_generic_union_branch(self)
+			};
+			avro_value_done(&value);
+		}
+		self->discriminant = discriminant;
+		if (discriminant >= 0) {
+#if DEBUG_BRANCHES
+			fprintf(stderr, "Initializing branch %d\n",
+				self->discriminant);
+#endif
+			check(rval, avro_value_init
+			      (avro_generic_union_branch_iface(iface, self),
+			       avro_generic_union_branch(self)));
+		}
+	}
+
+	if (branch != NULL) {
+		branch->iface = avro_generic_union_branch_iface(iface, self);
+		branch->self = avro_generic_union_branch(self);
+	}
+
+	return 0;
+}
+
+static avro_value_iface_t  AVRO_GENERIC_UNION_CLASS =
+{
+	/* "class" methods */
+	avro_generic_union_incref,
+	avro_generic_union_decref,
+	avro_generic_union_instance_size,
+	/* general "instance" methods */
+	avro_generic_union_init,
+	avro_generic_union_done,
+	avro_generic_union_reset,
+	avro_generic_union_get_type,
+	avro_generic_union_get_schema,
+	/* primitive getters */
+	NULL, /* get_boolean */
+	NULL, /* get_bytes */
+	NULL, /* grab_bytes */
+	NULL, /* get_double */
+	NULL, /* get_float */
+	NULL, /* get_int */
+	NULL, /* get_long */
+	NULL, /* get_null */
+	NULL, /* get_string */
+	NULL, /* grab_string */
+	NULL, /* get_enum */
+	NULL, /* get_fixed */
+	NULL, /* grab_fixed */
+	/* primitive setters */
+	NULL, /* set_boolean */
+	NULL, /* set_bytes */
+	NULL, /* give_bytes */
+	NULL, /* set_double */
+	NULL, /* set_float */
+	NULL, /* set_int */
+	NULL, /* set_long */
+	NULL, /* set_null */
+	NULL, /* set_string */
+	NULL, /* set_string_length */
+	NULL, /* give_string_length */
+	NULL, /* set_enum */
+	NULL, /* set_fixed */
+	NULL, /* give_fixed */
+	/* compound getters */
+	NULL, /* get_size */
+	NULL, /* get_by_index */
+	NULL, /* get_by_name */
+	avro_generic_union_get_discriminant,
+	avro_generic_union_get_current_branch,
+	/* compound setters */
+	NULL, /* append */
+	NULL, /* add */
+	avro_generic_union_set_branch
+};
+
+avro_value_iface_t *
+avro_generic_union_class(avro_schema_t schema,
+			 avro_value_iface_creator_t creator,
+			 void *user_data)
+{
+	if (!is_avro_union(schema)) {
+		avro_set_error("Expected union schema");
+		return NULL;
+	}
+
+	avro_generic_union_value_iface_t  *iface =
+		avro_new(avro_generic_union_value_iface_t);
+	if (iface == NULL) {
+		return NULL;
+	}
+
+	memset(iface, 0, sizeof(avro_generic_union_value_iface_t));
+	memcpy(&iface->iface, &AVRO_GENERIC_UNION_CLASS,
+	       sizeof(avro_value_iface_t));
+	iface->refcount = 1;
+	iface->schema = avro_schema_incref(schema);
+
+	iface->branch_count = avro_schema_union_size(schema);
+	size_t  branch_ifaces_size =
+		sizeof(avro_value_iface_t *) * iface->branch_count;
+
+	iface->branch_ifaces = avro_malloc(branch_ifaces_size);
+	if (iface->branch_ifaces == NULL) {
+		goto error;
+	}
+
+	size_t  max_branch_size = 0;
+	size_t  i;
+	for (i = 0; i < iface->branch_count; i++) {
+		avro_schema_t  branch_schema =
+		    avro_schema_union_branch(schema, i);
+
+		iface->branch_ifaces[i] = creator(branch_schema, user_data);
+		if (iface->branch_ifaces[i] == NULL) {
+			goto error;
+		}
+
+		size_t  branch_size =
+		    avro_value_instance_size(iface->branch_ifaces[i]);
+		if (branch_size == 0) {
+			avro_set_error("Union branch class must provide instance_size");
+			goto error;
+		}
+
+#if DEBUG_BRANCHES
+		fprintf(stderr, "Branch %zu, size %zu\n",
+			i, branch_size);
+#endif
+
+		if (branch_size > max_branch_size) {
+			max_branch_size = branch_size;
+		}
+	}
+
+	iface->instance_size =
+		sizeof(avro_generic_union_t) + max_branch_size;
+#if DEBUG_BRANCHES
+	fprintf(stderr, "MAX BRANCH SIZE: %zu\n", max_branch_size);
+#endif
+
+	return &iface->iface;
+
+error:
+	avro_schema_decref(iface->schema);
+	if (iface->branch_ifaces != NULL) {
+		for (i = 0; i < iface->branch_count; i++) {
+			if (iface->branch_ifaces[i] != NULL) {
+				avro_value_iface_decref(iface->branch_ifaces[i]);
+			}
+		}
+		avro_free(iface->branch_ifaces, branch_ifaces_size);
+	}
+	avro_freet(avro_generic_union_value_iface_t, iface);
+	return NULL;
+}

Added: avro/trunk/lang/c/src/generic.c
URL: http://svn.apache.org/viewvc/avro/trunk/lang/c/src/generic.c?rev=1146546&view=auto
==============================================================================
--- avro/trunk/lang/c/src/generic.c (added)
+++ avro/trunk/lang/c/src/generic.c Thu Jul 14 02:35:04 2011
@@ -0,0 +1,684 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to you under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+ * implied.  See the License for the specific language governing
+ * permissions and limitations under the License.
+ */
+
+#include <stdbool.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "avro/allocation.h"
+#include "avro/data.h"
+#include "avro/errors.h"
+#include "avro/generic.h"
+#include "avro/refcount.h"
+#include "avro/schema.h"
+#include "avro/value.h"
+#include "avro_private.h"
+
+/*-----------------------------------------------------------------------
+ * recursive schemas
+ */
+
+/*
+ * Recursive schemas are handled specially; the value implementation for
+ * an AVRO_LINK schema is simply a wrapper around the value
+ * implementation for the link's target schema.  The value methods all
+ * delegate to the wrapped implementation.
+ *
+ * We don't set the target_iface pointer when the link implementation is
+ * first created, since we might not have finished creating the
+ * implementation for the target schema.  (We create the implementations
+ * for child schemas depth-first, so the target schema's implementation
+ * won't be done until all of its descendants — including the link
+ * schema — have been instantiated.)
+ *
+ * So anyway, we set the target_iface pointer to NULL at first.  And
+ * then in a fix-up stage, once all of the non-link schemas have been
+ * instantiated, we go through and set the target_iface pointers for any
+ * link schemas we encountered.
+ */
+
+typedef struct avro_generic_link_value_iface {
+	avro_value_iface_t  iface;
+
+	/** The reference count for this interface. */
+	volatile int  refcount;
+
+	/** The schema for this interface. */
+	avro_schema_t  schema;
+
+	/** The target's implementation. */
+	avro_value_iface_t  *target_iface;
+} avro_generic_link_value_iface_t;
+
+
+static avro_value_iface_t *
+avro_generic_link_incref(avro_value_iface_t *viface)
+{
+	avro_generic_link_value_iface_t  *iface =
+	    (avro_generic_link_value_iface_t *) viface;
+	avro_refcount_inc(&iface->refcount);
+	return viface;
+}
+
+static void
+avro_generic_link_decref(avro_value_iface_t *viface)
+{
+	avro_generic_link_value_iface_t  *iface =
+	    (avro_generic_link_value_iface_t *) viface;
+
+	if (avro_refcount_dec(&iface->refcount)) {
+		avro_value_iface_decref(iface->target_iface);
+		avro_freet(avro_generic_link_value_iface_t, iface);
+	}
+}
+
+static size_t
+avro_generic_link_instance_size(const avro_value_iface_t *viface)
+{
+	AVRO_UNUSED(viface);
+	return sizeof(avro_value_t);
+}
+
+static int
+avro_generic_link_init(const avro_value_iface_t *viface, void *vself)
+{
+	avro_generic_link_value_iface_t  *iface =
+	    (avro_generic_link_value_iface_t *) viface;
+	avro_value_t  *self = vself;
+
+	return avro_value_new(iface->target_iface, self);
+}
+
+static void
+avro_generic_link_done(const avro_value_iface_t *iface, void *vself)
+{
+	AVRO_UNUSED(iface);
+	avro_value_t  *self = vself;
+	avro_value_free(self);
+}
+
+static int
+avro_generic_link_reset(const avro_value_iface_t *iface, void *vself)
+{
+	AVRO_UNUSED(iface);
+	avro_value_t  *self = vself;
+	return avro_value_reset(self);
+}
+
+static avro_type_t
+avro_generic_link_get_type(const avro_value_iface_t *viface, const void *vself)
+{
+	AVRO_UNUSED(viface);
+	const avro_value_t  *self = vself;
+	return avro_value_get_type(self);
+}
+
+static avro_schema_t
+avro_generic_link_get_schema(const avro_value_iface_t *viface, const void *vself)
+{
+	AVRO_UNUSED(viface);
+	const avro_value_t  *self = vself;
+	return avro_value_get_schema(self);
+}
+
+static int
+avro_generic_link_get_boolean(const avro_value_iface_t *iface,
+			      const void *vself, bool *out)
+{
+	AVRO_UNUSED(iface);
+	const avro_value_t  *self = vself;
+	return avro_value_get_boolean(self, out);
+}
+
+static int
+avro_generic_link_get_bytes(const avro_value_iface_t *iface,
+			    const void *vself, const void **buf, size_t *size)
+{
+	AVRO_UNUSED(iface);
+	const avro_value_t  *self = vself;
+	return avro_value_get_bytes(self, buf, size);
+}
+
+static int
+avro_generic_link_grab_bytes(const avro_value_iface_t *iface,
+			     const void *vself, avro_wrapped_buffer_t *dest)
+{
+	AVRO_UNUSED(iface);
+	const avro_value_t  *self = vself;
+	return avro_value_grab_bytes(self, dest);
+}
+
+static int
+avro_generic_link_get_double(const avro_value_iface_t *iface,
+			     const void *vself, double *out)
+{
+	AVRO_UNUSED(iface);
+	const avro_value_t  *self = vself;
+	return avro_value_get_double(self, out);
+}
+
+static int
+avro_generic_link_get_float(const avro_value_iface_t *iface,
+			    const void *vself, float *out)
+{
+	AVRO_UNUSED(iface);
+	const avro_value_t  *self = vself;
+	return avro_value_get_float(self, out);
+}
+
+static int
+avro_generic_link_get_int(const avro_value_iface_t *iface,
+			  const void *vself, int32_t *out)
+{
+	AVRO_UNUSED(iface);
+	const avro_value_t  *self = vself;
+	return avro_value_get_int(self, out);
+}
+
+static int
+avro_generic_link_get_long(const avro_value_iface_t *iface,
+			   const void *vself, int64_t *out)
+{
+	AVRO_UNUSED(iface);
+	const avro_value_t  *self = vself;
+	return avro_value_get_long(self, out);
+}
+
+static int
+avro_generic_link_get_null(const avro_value_iface_t *iface, const void *vself)
+{
+	AVRO_UNUSED(iface);
+	const avro_value_t  *self = vself;
+	return avro_value_get_null(self);
+}
+
+static int
+avro_generic_link_get_string(const avro_value_iface_t *iface,
+			     const void *vself, const char **str, size_t *size)
+{
+	AVRO_UNUSED(iface);
+	const avro_value_t  *self = vself;
+	return avro_value_get_string(self, str, size);
+}
+
+static int
+avro_generic_link_grab_string(const avro_value_iface_t *iface,
+			      const void *vself, avro_wrapped_buffer_t *dest)
+{
+	AVRO_UNUSED(iface);
+	const avro_value_t  *self = vself;
+	return avro_value_grab_string(self, dest);
+}
+
+static int
+avro_generic_link_get_enum(const avro_value_iface_t *iface,
+			   const void *vself, int *out)
+{
+	AVRO_UNUSED(iface);
+	const avro_value_t  *self = vself;
+	return avro_value_get_enum(self, out);
+}
+
+static int
+avro_generic_link_get_fixed(const avro_value_iface_t *iface,
+			    const void *vself, const void **buf, size_t *size)
+{
+	AVRO_UNUSED(iface);
+	const avro_value_t  *self = vself;
+	return avro_value_get_fixed(self, buf, size);
+}
+
+static int
+avro_generic_link_grab_fixed(const avro_value_iface_t *iface,
+			     const void *vself, avro_wrapped_buffer_t *dest)
+{
+	AVRO_UNUSED(iface);
+	const avro_value_t  *self = vself;
+	return avro_value_grab_fixed(self, dest);
+}
+
+static int
+avro_generic_link_set_boolean(const avro_value_iface_t *iface,
+			      void *vself, bool val)
+{
+	AVRO_UNUSED(iface);
+	avro_value_t  *self = vself;
+	return avro_value_set_boolean(self, val);
+}
+
+static int
+avro_generic_link_set_bytes(const avro_value_iface_t *iface,
+			    void *vself, void *buf, size_t size)
+{
+	AVRO_UNUSED(iface);
+	avro_value_t  *self = vself;
+	return avro_value_set_bytes(self, buf, size);
+}
+
+static int
+avro_generic_link_give_bytes(const avro_value_iface_t *iface,
+			     void *vself, avro_wrapped_buffer_t *buf)
+{
+	AVRO_UNUSED(iface);
+	avro_value_t  *self = vself;
+	return avro_value_give_bytes(self, buf);
+}
+
+static int
+avro_generic_link_set_double(const avro_value_iface_t *iface,
+			     void *vself, double val)
+{
+	AVRO_UNUSED(iface);
+	avro_value_t  *self = vself;
+	return avro_value_set_double(self, val);
+}
+
+static int
+avro_generic_link_set_float(const avro_value_iface_t *iface,
+			    void *vself, float val)
+{
+	AVRO_UNUSED(iface);
+	avro_value_t  *self = vself;
+	return avro_value_set_float(self, val);
+}
+
+static int
+avro_generic_link_set_int(const avro_value_iface_t *iface,
+			  void *vself, int32_t val)
+{
+	AVRO_UNUSED(iface);
+	avro_value_t  *self = vself;
+	return avro_value_set_int(self, val);
+}
+
+static int
+avro_generic_link_set_long(const avro_value_iface_t *iface,
+			   void *vself, int64_t val)
+{
+	AVRO_UNUSED(iface);
+	avro_value_t  *self = vself;
+	return avro_value_set_long(self, val);
+}
+
+static int
+avro_generic_link_set_null(const avro_value_iface_t *iface, void *vself)
+{
+	AVRO_UNUSED(iface);
+	avro_value_t  *self = vself;
+	return avro_value_set_null(self);
+}
+
+static int
+avro_generic_link_set_string(const avro_value_iface_t *iface,
+			     void *vself, char *str)
+{
+	AVRO_UNUSED(iface);
+	avro_value_t  *self = vself;
+	return avro_value_set_string(self, str);
+}
+
+static int
+avro_generic_link_set_string_len(const avro_value_iface_t *iface,
+				 void *vself, char *str, size_t size)
+{
+	AVRO_UNUSED(iface);
+	avro_value_t  *self = vself;
+	return avro_value_set_string_len(self, str, size);
+}
+
+static int
+avro_generic_link_give_string_len(const avro_value_iface_t *iface,
+				  void *vself, avro_wrapped_buffer_t *buf)
+{
+	AVRO_UNUSED(iface);
+	avro_value_t  *self = vself;
+	return avro_value_give_string_len(self, buf);
+}
+
+static int
+avro_generic_link_set_enum(const avro_value_iface_t *iface,
+			   void *vself, int val)
+{
+	AVRO_UNUSED(iface);
+	avro_value_t  *self = vself;
+	return avro_value_set_enum(self, val);
+}
+
+static int
+avro_generic_link_set_fixed(const avro_value_iface_t *iface,
+			    void *vself, void *buf, size_t size)
+{
+	AVRO_UNUSED(iface);
+	avro_value_t  *self = vself;
+	return avro_value_set_fixed(self, buf, size);
+}
+
+static int
+avro_generic_link_give_fixed(const avro_value_iface_t *iface,
+			     void *vself, avro_wrapped_buffer_t *buf)
+{
+	AVRO_UNUSED(iface);
+	avro_value_t  *self = vself;
+	return avro_value_give_fixed(self, buf);
+}
+
+static int
+avro_generic_link_get_size(const avro_value_iface_t *iface,
+			   const void *vself, size_t *size)
+{
+	AVRO_UNUSED(iface);
+	const avro_value_t  *self = vself;
+	return avro_value_get_size(self, size);
+}
+
+static int
+avro_generic_link_get_by_index(const avro_value_iface_t *iface,
+			       const void *vself, size_t index,
+			       avro_value_t *child, const char **name)
+{
+	AVRO_UNUSED(iface);
+	const avro_value_t  *self = vself;
+	return avro_value_get_by_index(self, index, child, name);
+}
+
+static int
+avro_generic_link_get_by_name(const avro_value_iface_t *iface,
+			      const void *vself, const char *name,
+			      avro_value_t *child, size_t *index)
+{
+	AVRO_UNUSED(iface);
+	const avro_value_t  *self = vself;
+	return avro_value_get_by_name(self, name, child, index);
+}
+
+static int
+avro_generic_link_get_discriminant(const avro_value_iface_t *iface,
+				   const void *vself, int *out)
+{
+	AVRO_UNUSED(iface);
+	const avro_value_t  *self = vself;
+	return avro_value_get_discriminant(self, out);
+}
+
+static int
+avro_generic_link_get_current_branch(const avro_value_iface_t *iface,
+				     const void *vself, avro_value_t *branch)
+{
+	AVRO_UNUSED(iface);
+	const avro_value_t  *self = vself;
+	return avro_value_get_current_branch(self, branch);
+}
+
+static int
+avro_generic_link_append(const avro_value_iface_t *iface,
+			 void *vself, avro_value_t *child_out,
+			 size_t *new_index)
+{
+	AVRO_UNUSED(iface);
+	avro_value_t  *self = vself;
+	return avro_value_append(self, child_out, new_index);
+}
+
+static int
+avro_generic_link_add(const avro_value_iface_t *iface,
+		      void *vself, const char *key,
+		      avro_value_t *child, size_t *index, bool *is_new)
+{
+	AVRO_UNUSED(iface);
+	avro_value_t  *self = vself;
+	return avro_value_add(self, key, child, index, is_new);
+}
+
+static int
+avro_generic_link_set_branch(const avro_value_iface_t *iface,
+			     void *vself, int discriminant,
+			     avro_value_t *branch)
+{
+	AVRO_UNUSED(iface);
+	avro_value_t  *self = vself;
+	return avro_value_set_branch(self, discriminant, branch);
+}
+
+static avro_value_iface_t  AVRO_GENERIC_LINK_CLASS =
+{
+	/* "class" methods */
+	avro_generic_link_incref,
+	avro_generic_link_decref,
+	avro_generic_link_instance_size,
+	/* general "instance" methods */
+	avro_generic_link_init,
+	avro_generic_link_done,
+	avro_generic_link_reset,
+	avro_generic_link_get_type,
+	avro_generic_link_get_schema,
+	/* primitive getters */
+	avro_generic_link_get_boolean,
+	avro_generic_link_get_bytes,
+	avro_generic_link_grab_bytes,
+	avro_generic_link_get_double,
+	avro_generic_link_get_float,
+	avro_generic_link_get_int,
+	avro_generic_link_get_long,
+	avro_generic_link_get_null,
+	avro_generic_link_get_string,
+	avro_generic_link_grab_string,
+	avro_generic_link_get_enum,
+	avro_generic_link_get_fixed,
+	avro_generic_link_grab_fixed,
+	/* primitive setters */
+	avro_generic_link_set_boolean,
+	avro_generic_link_set_bytes,
+	avro_generic_link_give_bytes,
+	avro_generic_link_set_double,
+	avro_generic_link_set_float,
+	avro_generic_link_set_int,
+	avro_generic_link_set_long,
+	avro_generic_link_set_null,
+	avro_generic_link_set_string,
+	avro_generic_link_set_string_len,
+	avro_generic_link_give_string_len,
+	avro_generic_link_set_enum,
+	avro_generic_link_set_fixed,
+	avro_generic_link_give_fixed,
+	/* compound getters */
+	avro_generic_link_get_size,
+	avro_generic_link_get_by_index,
+	avro_generic_link_get_by_name,
+	avro_generic_link_get_discriminant,
+	avro_generic_link_get_current_branch,
+	/* compound setters */
+	avro_generic_link_append,
+	avro_generic_link_add,
+	avro_generic_link_set_branch
+};
+
+static avro_value_iface_t *
+avro_generic_link_class(avro_schema_t schema)
+{
+	if (!is_avro_link(schema)) {
+		avro_set_error("Expected link schema");
+		return NULL;
+	}
+
+	avro_generic_link_value_iface_t  *iface =
+		avro_new(avro_generic_link_value_iface_t);
+	if (iface == NULL) {
+		return NULL;
+	}
+
+	memcpy(&iface->iface, &AVRO_GENERIC_LINK_CLASS,
+	       sizeof(avro_value_iface_t));
+	iface->refcount = 1;
+	iface->schema = avro_schema_incref(schema);
+	return &iface->iface;
+}
+
+
+/*-----------------------------------------------------------------------
+ * schema type dispatcher
+ */
+
+typedef struct memoize_state_t {
+	avro_memoize_t  mem;
+	avro_raw_array_t  links;
+} memoize_state_t;
+
+static avro_value_iface_t *
+avro_generic_class_from_schema_memoized(avro_schema_t schema,
+					void *user_data)
+{
+	memoize_state_t  *state = user_data;
+
+	/*
+	 * If we've already instantiated a value class for this schema,
+	 * just return it.
+	 */
+
+	avro_value_iface_t  *result = NULL;
+	if (avro_memoize_get(&state->mem, schema, NULL, (void **) &result)) {
+		return avro_value_iface_incref(result);
+	}
+
+	/*
+	 * Otherwise instantiate the value class based on the schema
+	 * type.
+	 */
+
+	switch (schema->type) {
+	case AVRO_BOOLEAN:
+		result = avro_generic_boolean_class();
+		break;
+	case AVRO_BYTES:
+		result = avro_generic_bytes_class();
+		break;
+	case AVRO_DOUBLE:
+		result = avro_generic_double_class();
+		break;
+	case AVRO_FLOAT:
+		result = avro_generic_float_class();
+		break;
+	case AVRO_INT32:
+		result = avro_generic_int_class();
+		break;
+	case AVRO_INT64:
+		result = avro_generic_long_class();
+		break;
+	case AVRO_NULL:
+		result = avro_generic_null_class();
+		break;
+	case AVRO_STRING:
+		result = avro_generic_string_class();
+		break;
+
+	case AVRO_ARRAY:
+		result = avro_generic_array_class
+		    (schema, avro_generic_class_from_schema_memoized, state);
+		break;
+	case AVRO_ENUM:
+		result = avro_generic_enum_class(schema);
+		break;
+	case AVRO_FIXED:
+		result = avro_generic_fixed_class(schema);
+		break;
+	case AVRO_MAP:
+		result = avro_generic_map_class
+		    (schema, avro_generic_class_from_schema_memoized, state);
+		break;
+	case AVRO_RECORD:
+		result = avro_generic_record_class
+		    (schema, avro_generic_class_from_schema_memoized, state);
+		break;
+	case AVRO_UNION:
+		result = avro_generic_union_class
+		    (schema, avro_generic_class_from_schema_memoized, state);
+		break;
+
+	case AVRO_LINK:
+		{
+			avro_value_iface_t  **link_ptr =
+			    avro_raw_array_append(&state->links);
+			result = avro_generic_link_class(schema);
+			*link_ptr = result;
+			break;
+		}
+
+	default:
+		avro_set_error("Unknown schema type");
+		return NULL;
+	}
+
+	/*
+	 * Add the new value implementation to the memoized state before
+	 * we return.
+	 */
+
+	avro_memoize_set(&state->mem, schema, NULL, result);
+	return result;
+}
+
+avro_value_iface_t *
+avro_generic_class_from_schema(avro_schema_t schema)
+{
+	/*
+	 * Create a state to keep track of the value implementations
+	 * that we create for each subschema.
+	 */
+
+	memoize_state_t  state;
+	avro_memoize_init(&state.mem);
+	avro_raw_array_init(&state.links, sizeof(avro_value_iface_t *));
+
+	/*
+	 * Create the value implementations.
+	 */
+
+	avro_value_iface_t  *result =
+	    avro_generic_class_from_schema_memoized(schema, &state);
+
+	/*
+	 * Fix up any link schemas so that their value implementations
+	 * point to their target schemas' implementations.
+	 */
+
+	size_t  i;
+	for (i = 0; i < avro_raw_array_size(&state.links); i++) {
+		avro_generic_link_value_iface_t  *link_iface =
+		    avro_raw_array_get
+		    (&state.links, avro_generic_link_value_iface_t *, i);
+		avro_schema_t  target_schema =
+		    avro_schema_link_target(link_iface->schema);
+
+		avro_value_iface_t  *target_iface = NULL;
+		if (!avro_memoize_get(&state.mem, target_schema, NULL,
+				      (void **) &target_iface)) {
+			avro_set_error("Never created a value implementation for %s",
+				       avro_schema_type_name(target_schema));
+			return NULL;
+		}
+
+		link_iface->target_iface = avro_value_iface_incref(target_iface);
+	}
+
+	/*
+	 * And now we can return.
+	 */
+
+	avro_memoize_done(&state.mem);
+	avro_raw_array_done(&state.links);
+	return result;
+}

Modified: avro/trunk/lang/c/src/io.c
URL: http://svn.apache.org/viewvc/avro/trunk/lang/c/src/io.c?rev=1146546&r1=1146545&r2=1146546&view=diff
==============================================================================
--- avro/trunk/lang/c/src/io.c (original)
+++ avro/trunk/lang/c/src/io.c Thu Jul 14 02:35:04 2011
@@ -15,10 +15,11 @@
  * permissions and limitations under the License. 
  */
 
+#include "avro/allocation.h"
 #include "avro/refcount.h"
-#include "avro_errors.h"
+#include "avro/errors.h"
+#include "avro/io.h"
 #include "avro_private.h"
-#include "allocation.h"
 #include <stdio.h>
 #include <stdlib.h>
 #include <errno.h>

Added: avro/trunk/lang/c/src/map.c
URL: http://svn.apache.org/viewvc/avro/trunk/lang/c/src/map.c?rev=1146546&view=auto
==============================================================================
--- avro/trunk/lang/c/src/map.c (added)
+++ avro/trunk/lang/c/src/map.c Thu Jul 14 02:35:04 2011
@@ -0,0 +1,129 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to you under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+ * implied.  See the License for the specific language governing
+ * permissions and limitations under the License.
+ */
+
+#include <errno.h>
+#include <string.h>
+
+#include "avro/data.h"
+#include "avro/allocation.h"
+#include "avro/errors.h"
+#include "st.h"
+
+
+#define raw_entry_size(element_size) \
+	(sizeof(avro_raw_map_entry_t) + element_size)
+
+void avro_raw_map_init(avro_raw_map_t *map, size_t element_size)
+{
+	memset(map, 0, sizeof(avro_raw_map_t));
+	avro_raw_array_init(&map->elements, raw_entry_size(element_size));
+	map->indices_by_key = st_init_strtable();
+}
+
+
+static void
+avro_raw_map_free_keys(avro_raw_map_t *map)
+{
+	unsigned int  i;
+	for (i = 0; i < avro_raw_map_size(map); i++) {
+		void  *ventry =
+		    (map->elements.data + map->elements.element_size * i);
+		avro_raw_map_entry_t  *entry = ventry;
+		avro_str_free((char *) entry->key);
+	}
+}
+
+
+void avro_raw_map_done(avro_raw_map_t *map)
+{
+	avro_raw_map_free_keys(map);
+	avro_raw_array_done(&map->elements);
+	st_free_table(map->indices_by_key);
+	memset(map, 0, sizeof(avro_raw_map_t));
+}
+
+
+void avro_raw_map_clear(avro_raw_map_t *map)
+{
+	avro_raw_map_free_keys(map);
+	avro_raw_array_clear(&map->elements);
+	st_free_table(map->indices_by_key);
+	map->indices_by_key = st_init_strtable();
+}
+
+
+int
+avro_raw_map_ensure_size(avro_raw_map_t *map, size_t desired_count)
+{
+	return avro_raw_array_ensure_size(&map->elements, desired_count);
+}
+
+
+void *avro_raw_map_get(const avro_raw_map_t *map, const char *key,
+		       size_t *index)
+{
+	st_data_t  data;
+	if (st_lookup(map->indices_by_key, (st_data_t) key, &data)) {
+		unsigned int  i = (unsigned int) data;
+		if (index) {
+			*index = i;
+		}
+		void  *raw_entry =
+		    (map->elements.data + map->elements.element_size * i);
+		return raw_entry + sizeof(avro_raw_map_entry_t);
+	} else {
+		return NULL;
+	}
+}
+
+
+int avro_raw_map_get_or_create(avro_raw_map_t *map, const char *key,
+			       void **element, size_t *index)
+{
+	st_data_t  data;
+	void  *el;
+	unsigned int  i;
+	int  is_new;
+
+	if (st_lookup(map->indices_by_key, (st_data_t) key, &data)) {
+		i = (unsigned int) data;
+		void  *raw_entry =
+		    (map->elements.data + map->elements.element_size * i);
+		el = raw_entry + sizeof(avro_raw_map_entry_t);
+		is_new = 0;
+	} else {
+		i = map->elements.element_count;
+		avro_raw_map_entry_t  *raw_entry =
+		    avro_raw_array_append(&map->elements);
+		raw_entry->key = avro_strdup(key);
+		st_insert(map->indices_by_key,
+			  (st_data_t) raw_entry->key, (st_data_t) i);
+		if (!raw_entry) {
+			return -ENOMEM;
+		}
+		el = ((void *) raw_entry) + sizeof(avro_raw_map_entry_t);
+		is_new = 1;
+	}
+
+	if (element) {
+		*element = el;
+	}
+	if (index) {
+		*index = i;
+	}
+	return is_new;
+}

Added: avro/trunk/lang/c/src/memoize.c
URL: http://svn.apache.org/viewvc/avro/trunk/lang/c/src/memoize.c?rev=1146546&view=auto
==============================================================================
--- avro/trunk/lang/c/src/memoize.c (added)
+++ avro/trunk/lang/c/src/memoize.c Thu Jul 14 02:35:04 2011
@@ -0,0 +1,165 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to you under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+ * implied.  See the License for the specific language governing
+ * permissions and limitations under the License.
+ */
+
+#include <errno.h>
+#include <string.h>
+
+#include "avro/data.h"
+#include "avro/allocation.h"
+#include "avro/errors.h"
+#include "avro_private.h"
+#include "st.h"
+
+
+typedef struct avro_memoize_key {
+	void  *key1;
+	void  *key2;
+} avro_memoize_key_t;
+
+
+static int
+avro_memoize_key_cmp(avro_memoize_key_t *a, avro_memoize_key_t *b)
+{
+	/*
+	 * This isn't a proper cmp operation, since it always returns 1
+	 * if the keys are different.  But that's okay for the hash
+	 * table implementation we're using.
+	 */
+
+	return (a->key1 != b->key1) || (a->key2 != b->key2);
+}
+
+
+static int
+avro_memoize_key_hash(avro_memoize_key_t *a)
+{
+	return ((uintptr_t) a->key1) ^ ((uintptr_t) a->key2);
+}
+
+
+static struct st_hash_type  avro_memoize_hash_type = {
+	avro_memoize_key_cmp,
+	avro_memoize_key_hash
+};
+
+
+void
+avro_memoize_init(avro_memoize_t *mem)
+{
+	memset(mem, 0, sizeof(avro_memoize_t));
+	mem->cache = st_init_table(&avro_memoize_hash_type);
+}
+
+
+static int
+avro_memoize_free_key(avro_memoize_key_t *key, void *result, void *dummy)
+{
+	AVRO_UNUSED(result);
+	AVRO_UNUSED(dummy);
+	avro_freet(avro_memoize_key_t, key);
+	return ST_CONTINUE;
+}
+
+
+void
+avro_memoize_done(avro_memoize_t *mem)
+{
+	st_foreach(mem->cache, avro_memoize_free_key, 0);
+	st_free_table(mem->cache);
+	memset(mem, 0, sizeof(avro_memoize_t));
+}
+
+
+int
+avro_memoize_get(avro_memoize_t *mem,
+		 void *key1, void *key2,
+		 void **result)
+{
+	avro_memoize_key_t  key;
+	key.key1 = key1;
+	key.key2 = key2;
+
+	union {
+		st_data_t  data;
+		void  *value;
+	} val;
+
+	if (st_lookup(mem->cache, (st_data_t) &key, &val.data)) {
+		if (result) {
+			*result = val.value;
+		}
+		return 1;
+	} else {
+		return 0;
+	}
+}
+
+
+void
+avro_memoize_set(avro_memoize_t *mem,
+		 void *key1, void *key2,
+		 void *result)
+{
+	/*
+	 * First see if there's already a cached value for this key.  If
+	 * so, we don't want to allocate a new avro_memoize_key_t
+	 * instance.
+	 */
+
+	avro_memoize_key_t  key;
+	key.key1 = key1;
+	key.key2 = key2;
+
+	union {
+		st_data_t  data;
+		void  *value;
+	} val;
+
+	if (st_lookup(mem->cache, (st_data_t) &key, &val.data)) {
+		st_insert(mem->cache, (st_data_t) &key, (st_data_t) result);
+		return;
+	}
+
+	/*
+	 * If it's a new key pair, then we do need to allocate.
+	 */
+
+	avro_memoize_key_t  *real_key = avro_new(avro_memoize_key_t);
+	real_key->key1 = key1;
+	real_key->key2 = key2;
+
+	st_insert(mem->cache, (st_data_t) real_key, (st_data_t) result);
+}
+
+
+void
+avro_memoize_delete(avro_memoize_t *mem, void *key1, void *key2)
+{
+	avro_memoize_key_t  key;
+	key.key1 = key1;
+	key.key2 = key2;
+
+	union {
+		st_data_t  data;
+		avro_memoize_key_t  *key;
+	} real_key;
+
+	real_key.key = &key;
+	if (st_delete(mem->cache, &real_key.data, NULL)) {
+		avro_freet(avro_memoize_key_t, real_key.key);
+	}
+}



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