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// 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;
if (output->pos + count > output->length) {
return -1;
}
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 BrotliStdinInputFunction(void* data, uint8_t* buf, size_t count) {
#ifndef _WIN32
return read(STDIN_FILENO, buf, count);
#else
return -1;
#endif
}
BrotliInput BrotliStdinInput() {
BrotliInput in;
in.cb_ = BrotliStdinInputFunction;
in.data_ = NULL;
return in;
}
int BrotliStdoutOutputFunction(void* data, const uint8_t* buf, size_t count) {
#ifndef _WIN32
return write(STDOUT_FILENO, buf, count);
#else
return -1;
#endif
}
BrotliOutput BrotliStdoutOutput() {
BrotliOutput out;
out.cb_ = BrotliStdoutOutputFunction;
out.data_ = NULL;
return out;
}
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;
}
#if defined(__cplusplus) || defined(c_plusplus)
} // extern "C"
#endif
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