mirror of
https://github.com/google/brotli.git
synced 2024-11-29 22:51:05 +00:00
112 lines
2.9 KiB
C
112 lines
2.9 KiB
C
/* Copyright 2013 Google Inc. All Rights Reserved.
|
|
|
|
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.
|
|
*/
|
|
|
|
/* Functions for streaming input and output. */
|
|
|
|
#include <string.h>
|
|
#ifndef _WIN32
|
|
#include <unistd.h>
|
|
#endif
|
|
#include "./streams.h"
|
|
|
|
#if defined(__cplusplus) || defined(c_plusplus)
|
|
extern "C" {
|
|
#endif
|
|
|
|
int BrotliMemInputFunction(void* data, uint8_t* buf, size_t count) {
|
|
BrotliMemInput* input = (BrotliMemInput*)data;
|
|
if (input->pos > input->length) {
|
|
return -1;
|
|
}
|
|
if (input->pos + count > input->length) {
|
|
count = input->length - input->pos;
|
|
}
|
|
memcpy(buf, input->buffer + input->pos, count);
|
|
input->pos += count;
|
|
return (int)count;
|
|
}
|
|
|
|
BrotliInput BrotliInitMemInput(const uint8_t* buffer, size_t length,
|
|
BrotliMemInput* mem_input) {
|
|
BrotliInput input;
|
|
mem_input->buffer = buffer;
|
|
mem_input->length = length;
|
|
mem_input->pos = 0;
|
|
input.cb_ = &BrotliMemInputFunction;
|
|
input.data_ = mem_input;
|
|
return input;
|
|
}
|
|
|
|
int BrotliMemOutputFunction(void* data, const uint8_t* buf, size_t count) {
|
|
BrotliMemOutput* output = (BrotliMemOutput*)data;
|
|
size_t limit = output->length - output->pos;
|
|
if (count > limit) {
|
|
count = limit;
|
|
}
|
|
memcpy(output->buffer + output->pos, buf, count);
|
|
output->pos += count;
|
|
return (int)count;
|
|
}
|
|
|
|
BrotliOutput BrotliInitMemOutput(uint8_t* buffer, size_t length,
|
|
BrotliMemOutput* mem_output) {
|
|
BrotliOutput output;
|
|
mem_output->buffer = buffer;
|
|
mem_output->length = length;
|
|
mem_output->pos = 0;
|
|
output.cb_ = &BrotliMemOutputFunction;
|
|
output.data_ = mem_output;
|
|
return output;
|
|
}
|
|
|
|
int BrotliFileInputFunction(void* data, uint8_t* buf, size_t count) {
|
|
return (int)fread(buf, 1, count, (FILE*)data);
|
|
}
|
|
|
|
BrotliInput BrotliFileInput(FILE* f) {
|
|
BrotliInput in;
|
|
in.cb_ = BrotliFileInputFunction;
|
|
in.data_ = f;
|
|
return in;
|
|
}
|
|
|
|
int BrotliFileOutputFunction(void* data, const uint8_t* buf, size_t count) {
|
|
return (int)fwrite(buf, 1, count, (FILE*)data);
|
|
}
|
|
|
|
BrotliOutput BrotliFileOutput(FILE* f) {
|
|
BrotliOutput out;
|
|
out.cb_ = BrotliFileOutputFunction;
|
|
out.data_ = f;
|
|
return out;
|
|
}
|
|
|
|
int BrotliNullOutputFunction(void* data , const uint8_t* buf, size_t count) {
|
|
BROTLI_UNUSED(data);
|
|
BROTLI_UNUSED(buf);
|
|
return (int)count;
|
|
}
|
|
|
|
BrotliOutput BrotliNullOutput() {
|
|
BrotliOutput out;
|
|
out.cb_ = BrotliNullOutputFunction;
|
|
out.data_ = NULL;
|
|
return out;
|
|
}
|
|
|
|
#if defined(__cplusplus) || defined(c_plusplus)
|
|
} /* extern "C" */
|
|
#endif
|