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/*
* 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 <axutil_stack.h>
#include <axutil_utils.h>
#include <axutil_env.h>
#include <stdlib.h>
#include <string.h>
#define AXIS2_STACK_DEFAULT_CAPACITY 10
struct axutil_stack
{
void **data;
/** current number of elements */
int size;
/** total capacity */
int capacity;
axis2_bool_t is_empty_stack;
};
AXIS2_EXTERN axutil_stack_t *AXIS2_CALL
axutil_stack_create(
const axutil_env_t *env)
{
axutil_stack_t *stack = NULL;
AXIS2_ENV_CHECK(env, NULL);
stack = (axutil_stack_t *)AXIS2_MALLOC(env->allocator, sizeof(axutil_stack_t));
if(!stack)
{
AXIS2_ERROR_SET(env->error, AXIS2_ERROR_NO_MEMORY, AXIS2_FAILURE);
AXIS2_LOG_ERROR(env->log, AXIS2_LOG_SI, "Out of memory");
return NULL;
}
stack->data = NULL;
stack->size = 0;
stack->capacity = AXIS2_STACK_DEFAULT_CAPACITY;
stack->is_empty_stack = AXIS2_TRUE;
stack->data = AXIS2_MALLOC(env->allocator, sizeof(void *) * AXIS2_STACK_DEFAULT_CAPACITY);
if(!stack->data)
{
AXIS2_ERROR_SET(env->error, AXIS2_ERROR_NO_MEMORY, AXIS2_FAILURE);
AXIS2_LOG_ERROR(env->log, AXIS2_LOG_SI, "Out of memory");
axutil_stack_free(stack, env);
return NULL;
}
return stack;
}
void AXIS2_CALL
axutil_stack_free(
axutil_stack_t *stack,
const axutil_env_t *env)
{
AXIS2_ENV_CHECK(env, AXIS2_FAILURE);
if(stack->data)
{
AXIS2_FREE(env->allocator, stack->data);
}
AXIS2_FREE(env->allocator, stack);
return;
}
void *AXIS2_CALL
axutil_stack_pop(
axutil_stack_t *stack,
const axutil_env_t *env)
{
void *value = NULL;
AXIS2_ENV_CHECK(env, NULL);
if(stack->is_empty_stack == AXIS2_TRUE || stack->size == 0)
{
return NULL;
}
if(stack->size > 0)
{
value = stack->data[stack->size - 1];
stack->data[stack->size - 1] = NULL;
stack->size--;
if(stack->size == 0)
{
stack->is_empty_stack = AXIS2_TRUE;
}
}
return value;
}
axis2_status_t AXIS2_CALL
axutil_stack_push(
axutil_stack_t *stack,
const axutil_env_t *env,
void *value)
{
AXIS2_ENV_CHECK(env, AXIS2_FAILURE);
AXIS2_PARAM_CHECK(env->error, value, AXIS2_FAILURE);
if((stack->size < stack->capacity) && (stack->capacity > 0))
{
stack->data[stack->size++] = value;
}
else
{
void **new_data = NULL;
int new_capacity = stack->capacity + AXIS2_STACK_DEFAULT_CAPACITY;
new_data = AXIS2_MALLOC(env->allocator, sizeof(void *) * new_capacity);
if(!new_data)
{
AXIS2_ERROR_SET(env->error, AXIS2_ERROR_NO_MEMORY, AXIS2_FAILURE);
AXIS2_LOG_ERROR(env->log, AXIS2_LOG_SI, "Out of memory");
return AXIS2_FAILURE;
}
memset(new_data, 0, sizeof(void *) * new_capacity);
memcpy(new_data, stack->data, sizeof(void *) * (stack->capacity));
stack->capacity = new_capacity;
AXIS2_FREE(env->allocator, stack->data);
stack->data = new_data;
stack->data[stack->size++] = value;
}
stack->is_empty_stack = AXIS2_FALSE;
return AXIS2_SUCCESS;
}
int AXIS2_CALL
axutil_stack_size(
axutil_stack_t *stack,
const axutil_env_t *env)
{
return stack->size;
}
void *AXIS2_CALL
axutil_stack_get(
axutil_stack_t *stack,
const axutil_env_t *env)
{
if(stack->size > 0)
{
return stack->data[stack->size - 1];
}
return NULL;
}
void *AXIS2_CALL
axutil_stack_get_at(
axutil_stack_t *stack,
const axutil_env_t *env,
int i)
{
if((stack->size == 0) || (i < 0) || (i >= stack->size))
{
return NULL;
}
return stack->data[i];
}
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