#include <stdlib.h>
#include <string.h>
#include "zipint.h"
zip_uint8_t *
_zip_buffer_data(zip_buffer_t *buffer)
{
return buffer->data;
}
void
_zip_buffer_free(zip_buffer_t *buffer)
{
if (buffer == NULL) {
return;
}
if (buffer->free_data) {
free(buffer->data);
}
free(buffer);
}
bool
_zip_buffer_eof(zip_buffer_t *buffer)
{
return buffer->ok && buffer->offset == buffer->size;
}
zip_uint8_t *
_zip_buffer_get(zip_buffer_t *buffer, zip_uint64_t length)
{
zip_uint8_t *data;
if (!buffer->ok || buffer->offset + length < length || buffer->offset + length > buffer->size) {
buffer->ok = false;
return NULL;
}
data = buffer->data + buffer->offset;
buffer->offset += length;
return data;
}
zip_uint16_t
_zip_buffer_get_16(zip_buffer_t *buffer)
{
zip_uint8_t *data = _zip_buffer_get(buffer, 2);
if (data == NULL) {
return 0;
}
return (zip_uint16_t)(data[0] + (data[1] << 8));
}
zip_uint32_t
_zip_buffer_get_32(zip_buffer_t *buffer)
{
zip_uint8_t *data = _zip_buffer_get(buffer, 4);
if (data == NULL) {
return 0;
}
return ((((((zip_uint32_t)data[3] << 8) + data[2]) << 8) + data[1]) << 8) + data[0];
}
zip_uint64_t
_zip_buffer_get_64(zip_buffer_t *buffer)
{
zip_uint8_t *data = _zip_buffer_get(buffer, 8);
if (data == NULL) {
return 0;
}
return ((zip_uint64_t)data[7] << 56) + ((zip_uint64_t)data[6] << 48) + ((zip_uint64_t)data[5] << 40) + ((zip_uint64_t)data[4] << 32) + ((zip_uint64_t)data[3] << 24) + ((zip_uint64_t)data[2] << 16) + ((zip_uint64_t)data[1] << 8) + (zip_uint64_t)data[0];
}
zip_uint8_t
_zip_buffer_get_8(zip_buffer_t *buffer)
{
zip_uint8_t *data = _zip_buffer_get(buffer, 1);
if (data == NULL) {
return 0;
}
return data[0];
}
zip_uint64_t
_zip_buffer_left(zip_buffer_t *buffer)
{
return buffer->ok ? buffer->size - buffer->offset : 0;
}
zip_buffer_t *
_zip_buffer_new(zip_uint8_t *data, zip_uint64_t size)
{
bool free_data = (data == NULL);
zip_buffer_t *buffer;
if (data == NULL) {
if ((data = (zip_uint8_t *)malloc(size)) == NULL) {
return NULL;
}
}
if ((buffer = (zip_buffer_t *)malloc(sizeof(*buffer))) == NULL) {
if (free_data) {
free(data);
}
return NULL;
}
buffer->ok = true;
buffer->data = data;
buffer->size = size;
buffer->offset = 0;
buffer->free_data = free_data;
return buffer;
}
zip_buffer_t *
_zip_buffer_new_from_source(zip_source_t *src, zip_uint64_t size, zip_uint8_t *buf, zip_error_t *error)
{
zip_buffer_t *buffer;
if ((buffer = _zip_buffer_new(buf, size)) == NULL) {
zip_error_set(error, ZIP_ER_MEMORY, 0);
return NULL;
}
if (_zip_read(src, buffer->data, size, error) < 0) {
_zip_buffer_free(buffer);
return NULL;
}
return buffer;
}
zip_uint64_t
_zip_buffer_offset(zip_buffer_t *buffer)
{
return buffer->ok ? buffer->offset : 0;
}
bool
_zip_buffer_ok(zip_buffer_t *buffer)
{
return buffer->ok;
}
int
_zip_buffer_put(zip_buffer_t *buffer, const void *src, size_t length)
{
zip_uint8_t *dst = _zip_buffer_get(buffer, length);
if (dst == NULL) {
return -1;
}
memcpy(dst, src, length);
return 0;
}
int
_zip_buffer_put_16(zip_buffer_t *buffer, zip_uint16_t i)
{
zip_uint8_t *data = _zip_buffer_get(buffer, 2);
if (data == NULL) {
return -1;
}
data[0] = (zip_uint8_t)(i & 0xff);
data[1] = (zip_uint8_t)((i >> 8) & 0xff);
return 0;
}
int
_zip_buffer_put_32(zip_buffer_t *buffer, zip_uint32_t i)
{
zip_uint8_t *data = _zip_buffer_get(buffer, 4);
if (data == NULL) {
return -1;
}
data[0] = (zip_uint8_t)(i & 0xff);
data[1] = (zip_uint8_t)((i >> 8) & 0xff);
data[2] = (zip_uint8_t)((i >> 16) & 0xff);
data[3] = (zip_uint8_t)((i >> 24) & 0xff);
return 0;
}
int
_zip_buffer_put_64(zip_buffer_t *buffer, zip_uint64_t i)
{
zip_uint8_t *data = _zip_buffer_get(buffer, 8);
if (data == NULL) {
return -1;
}
data[0] = (zip_uint8_t)(i & 0xff);
data[1] = (zip_uint8_t)((i >> 8) & 0xff);
data[2] = (zip_uint8_t)((i >> 16) & 0xff);
data[3] = (zip_uint8_t)((i >> 24) & 0xff);
data[4] = (zip_uint8_t)((i >> 32) & 0xff);
data[5] = (zip_uint8_t)((i >> 40) & 0xff);
data[6] = (zip_uint8_t)((i >> 48) & 0xff);
data[7] = (zip_uint8_t)((i >> 56) & 0xff);
return 0;
}
int
_zip_buffer_put_8(zip_buffer_t *buffer, zip_uint8_t i)
{
zip_uint8_t *data = _zip_buffer_get(buffer, 1);
if (data == NULL) {
return -1;
}
data[0] = i;
return 0;
}
int
_zip_buffer_set_offset(zip_buffer_t *buffer, zip_uint64_t offset)
{
if (offset > buffer->size) {
buffer->ok = false;
return -1;
}
buffer->ok = true;
buffer->offset = offset;
return 0;
}
int
_zip_buffer_skip(zip_buffer_t *buffer, zip_uint64_t length) {
zip_uint64_t offset = buffer->offset + length;
if (offset < buffer->offset) {
buffer->ok = false;
return -1;
}
return _zip_buffer_set_offset(buffer, offset);
}
zip_uint64_t
_zip_buffer_size(zip_buffer_t *buffer)
{
return buffer->size;
}