/*
* Licensed to the OpenAirInterface (OAI) Software Alliance under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The OpenAirInterface Software Alliance licenses this file to You under
* the OAI Public License, Version 1.1 (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.openairinterface.org/?page_id=698
*
* 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.
*-------------------------------------------------------------------------------
* For more information about the OpenAirInterface (OAI) Software Alliance:
* contact@openairinterface.org
*/
#include <pthread.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#define G_LOG_DOMAIN ("BUFFERS")
#include <glib.h>
#include "rc.h"
#include "buffers.h"
extern int debug_buffers;
static
int buffer_fetch(buffer_t *buffer, uint32_t offset, int size, void *value);
/* Try to fetch 8 bits unsigned from the buffer */
uint8_t buffer_get_uint8_t(buffer_t *buffer, uint32_t offset)
{
uint8_t value;
buffer_fetch(buffer, offset, 1, &value);
return value;
}
/* Try to fetch 16 bits unsigned from the buffer */
uint16_t buffer_get_uint16_t(buffer_t *buffer, uint32_t offset)
{
uint16_t value;
buffer_fetch(buffer, offset, 2, &value);
return value;
}
/* Try to fetch 32 bits unsigned from the buffer */
uint32_t buffer_get_uint32_t(buffer_t *buffer, uint32_t offset)
{
uint32_t value;
buffer_fetch(buffer, offset, 4, &value);
return value;
}
/* Try to fetch 64 bits unsigned from the buffer */
uint64_t buffer_get_uint64_t(buffer_t *buffer, uint32_t offset)
{
uint64_t value;
buffer_fetch(buffer, offset, 8, &value);
return value;
}
static
int buffer_fetch(buffer_t *buffer, uint32_t offset, int size, void *value)
{
if (buffer == NULL || value == NULL)
return -1;
if (size <= 0)
return -1;
if (buffer->size_bytes < ((offset >> 3) + size)) {
g_warning("Not enough data to fetch");
return -1;
}
memcpy(value, &buffer->data[offset >> 3], size);
buffer->buffer_current = &buffer->data[(offset >> 3) + size];
return 0;
}
int buffer_fetch_nbytes(buffer_t *buffer, uint32_t offset, int n_bytes, uint8_t *value)
{
if (buffer->size_bytes < ((offset >> 3) + n_bytes)) {
g_warning("Not enough data to fetch");
return -1;
}
memcpy(&value[0], &buffer->data[offset >> 3], n_bytes);
return 0;
}
int buffer_fetch_bits(buffer_t *buffer, uint32_t offset, int nbits, uint32_t *value)
{
uint32_t temp = 0;
int i;
if (buffer == NULL || value == NULL)
return RC_BAD_PARAM;
/* We cannot fetch more than 32 bits */
if (nbits > 32)
return RC_BAD_PARAM;
for (i = 0; i < nbits; i++)
{
temp |= ((buffer->data[(offset + i) / 8] >> ((offset + i) % 8)) & 1) << i;
}
*value = temp;
return RC_OK;
}
/**
* @brief Create a new buffer from data
* @param buffer caller reference where created buffer will be stored
* @param data Data to attach to the new buffer
* @param length Length of data buffer
* @param data_static flag that indicates if data pointer has been statically (= 0) or not (!= 0)
*/
int buffer_new_from_data(buffer_t **buffer, uint8_t *data, const uint32_t length,
int data_static)
{
buffer_t *new;
if (!buffer)
return RC_BAD_PARAM;
new = malloc(sizeof(buffer_t));
new->size_bytes = length;
if (data && length > 0) {
if (data_static == 0) {
new->data = malloc(sizeof(uint8_t) * new->size_bytes);
memcpy(new->data, data, new->size_bytes);
} else {
new->data = data;
}
new->buffer_current = &new->data[0];
} else {
new->buffer_current = NULL;
}
*buffer = new;
return 0;
}
#define INDENTED(fILE, x, y) \
do { \
int indentation = x; \
while(indentation--) fprintf(fILE, " "); \
y; \
} while(0)
#define INDENT_BREAK 20
void buffer_dump(buffer_t *buffer, FILE *to)
{
FILE *file = to;
uint32_t i;
if (!buffer)
return;
if (!to)
to = stdout;
fprintf(file, "<Buffer>\n");
INDENTED(file, 4, fprintf(file, "<Length>%u<Length>\n", buffer->size_bytes));
INDENTED(file, 4, fprintf(file, "<Bytes>\n"));
for (i = 0; i < buffer->size_bytes; i++)
{
if ((i % INDENT_BREAK) == 0)
fprintf(file, " ");
fprintf(file, "0x%02x ", buffer->data[i]);
if ((i % INDENT_BREAK) == (INDENT_BREAK - 1))
fprintf(file, "\n");
}
if ((i % INDENT_BREAK) != (INDENT_BREAK - 1))
fprintf(file, "\n");
INDENTED(file, 4, fprintf(file, "</Bytes>\n"));
fprintf(file, "</Buffer>\n");
}
int buffer_append_data(buffer_t *buffer, const uint8_t *data, const uint32_t length)
{
if (!buffer)
return -1;
if (data && length > 0) {
if (!buffer->data) {
buffer->size_bytes = length;
buffer->data = malloc(sizeof(uint8_t) * buffer->size_bytes);
memcpy(buffer->data, data, buffer->size_bytes);
} else {
buffer->data = realloc(buffer->data, sizeof(uint8_t) * (buffer->size_bytes + length));
memcpy(&buffer->data[buffer->size_bytes], data, length);
buffer->size_bytes += length;
}
buffer->buffer_current = &buffer->data[0];
}
return 0;
}
int buffer_has_enouch_data(buffer_t *buffer, uint32_t offset, uint32_t to_get)
{
int underflow;
if (!buffer)
return -1;
underflow = (buffer->size_bytes >= ((offset + to_get) / 8)) ? 0 : -1;
if (underflow && debug_buffers)
g_warning("Detected Underflow offset %u, to_get %u, buffer size %u\n",
offset, to_get, buffer->size_bytes);
return underflow;
}
void *buffer_at_offset(buffer_t *buffer, uint32_t offset)
{
// if (buffer_has_enouch_data(buffer, 0, offset) != 0) {
// return NULL;
// }
return &buffer->data[offset / 8];
}