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/* Copyright 2019 IBM Corp.
*
* Licensed 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 <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <string.h>
#include <assert.h>
#include <endian.h>
#include "buffer.h"
int cbuf_new(struct cronus_buffer *cbuf, size_t size)
{
cbuf->ptr = malloc(size);
if (!cbuf->ptr)
return ENOMEM;
cbuf->size = size;
cbuf->offset = 0;
return 0;
}
int cbuf_new_from_buf(struct cronus_buffer *cbuf, uint8_t *ptr, size_t size)
{
int ret;
ret = cbuf_new(cbuf, size);
if (ret)
return ret;
memcpy(cbuf->ptr, ptr, size);
return 0;
}
void cbuf_free(struct cronus_buffer *cbuf)
{
free(cbuf->ptr);
}
void cbuf_init(struct cronus_buffer *cbuf, uint8_t *ptr, size_t size)
{
*cbuf = (struct cronus_buffer) {
.ptr = ptr,
.size = size,
};
}
uint8_t *cbuf_ptr(struct cronus_buffer *cbuf)
{
return cbuf->ptr + cbuf->offset;
}
size_t cbuf_offset(struct cronus_buffer *cbuf)
{
return cbuf->offset;
}
size_t cbuf_size(struct cronus_buffer *cbuf)
{
return cbuf->size;
}
uint8_t *cbuf_finish(struct cronus_buffer *cbuf, size_t *length)
{
*length = cbuf->offset;
return cbuf->ptr;
}
static void cbuf_check_offset(struct cronus_buffer *cbuf, size_t count)
{
assert(cbuf->offset + count <= cbuf->size);
}
void cbuf_write(struct cronus_buffer *cbuf, uint8_t *bytes, size_t count)
{
cbuf_check_offset(cbuf, count);
memcpy(cbuf->ptr + cbuf->offset, bytes, count);
cbuf->offset += count;
}
void cbuf_read(struct cronus_buffer *cbuf, uint8_t *bytes, size_t count)
{
cbuf_check_offset(cbuf, count);
memcpy(bytes, cbuf->ptr + cbuf->offset, count);
cbuf->offset += count;
}
void cbuf_write_uint8(struct cronus_buffer *cbuf, uint8_t value)
{
cbuf_write(cbuf, &value, 1);
}
void cbuf_read_uint8(struct cronus_buffer *cbuf, uint8_t *value)
{
cbuf_read(cbuf, value, 1);
}
void cbuf_write_uint16(struct cronus_buffer *cbuf, uint16_t value)
{
uint16_t data = htobe16(value);
cbuf_write(cbuf, (uint8_t *)&data, 2);
}
void cbuf_read_uint16(struct cronus_buffer *cbuf, uint16_t *value)
{
uint16_t data;
cbuf_read(cbuf, (uint8_t *)&data, 2);
*value = be16toh(data);
}
void cbuf_write_uint32(struct cronus_buffer *cbuf, uint32_t value)
{
uint32_t data = htobe32(value);
cbuf_write(cbuf, (uint8_t *)&data, 4);
}
void cbuf_read_uint32(struct cronus_buffer *cbuf, uint32_t *value)
{
uint32_t data;
cbuf_read(cbuf, (uint8_t *)&data, 4);
*value = be32toh(data);
}
void cbuf_write_uint64(struct cronus_buffer *cbuf, uint64_t value)
{
uint64_t data = htobe64(value);
cbuf_write(cbuf, (uint8_t *)&data, 8);
}
void cbuf_read_uint64(struct cronus_buffer *cbuf, uint64_t *value)
{
uint64_t data;
cbuf_read(cbuf, (uint8_t *)&data, 8);
*value = be64toh(data);
}
void cbuf_dump(struct cronus_buffer *cbuf, const char *prefix)
{
size_t len;
unsigned int i;
if (!prefix)
prefix = "DUMP";
len = (cbuf->offset > 0) ? cbuf->offset : cbuf->size;
for (i=0; i<len; i++) {
if (i % 16 == 0)
fprintf(stderr, "%s: 0x%08x", prefix, i);
fprintf(stderr, " %02x", cbuf->ptr[i]);
if ((i+1) % 16 == 0)
fprintf(stderr, "\n");
}
fprintf(stderr, "\n");
}
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