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/*
* Copyright 2016 WebAssembly Community Group participants
*
* 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 "stream.h"
#include <cassert>
#include <cctype>
#define DUMP_OCTETS_PER_LINE 16
#define DUMP_OCTETS_PER_GROUP 2
namespace wabt {
Stream::Stream(Writer* writer, Stream* log_stream)
: writer_(writer),
offset_(0),
result_(Result::Ok),
log_stream_(log_stream) {}
void Stream::AddOffset(ssize_t delta) {
offset_ += delta;
}
void Stream::WriteDataAt(size_t at,
const void* src,
size_t size,
const char* desc,
PrintChars print_chars) {
if (WABT_FAILED(result_))
return;
if (log_stream_) {
log_stream_->WriteMemoryDump(src, size, at, nullptr, desc, print_chars);
}
result_ = writer_->WriteData(at, src, size);
}
void Stream::WriteData(const void* src,
size_t size,
const char* desc,
PrintChars print_chars) {
WriteDataAt(offset_, src, size, desc, print_chars);
offset_ += size;
}
void Stream::MoveData(size_t dst_offset, size_t src_offset, size_t size) {
if (WABT_FAILED(result_))
return;
if (log_stream_) {
log_stream_->Writef(
"; move data: [%" PRIzx ", %" PRIzx ") -> [%" PRIzx ", %" PRIzx ")\n",
src_offset, src_offset + size, dst_offset, dst_offset + size);
}
result_ = writer_->MoveData(dst_offset, src_offset, size);
}
void Stream::Writef(const char* format, ...) {
WABT_SNPRINTF_ALLOCA(buffer, length, format);
WriteData(buffer, length);
}
void Stream::WriteMemoryDump(const void* start,
size_t size,
size_t offset,
const char* prefix,
const char* desc,
PrintChars print_chars) {
const uint8_t* p = static_cast<const uint8_t*>(start);
const uint8_t* end = p + size;
while (p < end) {
const uint8_t* line = p;
const uint8_t* line_end = p + DUMP_OCTETS_PER_LINE;
if (prefix)
Writef("%s", prefix);
Writef("%07" PRIzx ": ", reinterpret_cast<intptr_t>(p) -
reinterpret_cast<intptr_t>(start) + offset);
while (p < line_end) {
for (int i = 0; i < DUMP_OCTETS_PER_GROUP; ++i, ++p) {
if (p < end) {
Writef("%02x", *p);
} else {
WriteChar(' ');
WriteChar(' ');
}
}
WriteChar(' ');
}
if (print_chars == PrintChars::Yes) {
WriteChar(' ');
p = line;
for (int i = 0; i < DUMP_OCTETS_PER_LINE && p < end; ++i, ++p)
WriteChar(isprint(*p) ? *p : '.');
}
/* if there are multiple lines, only print the desc on the last one */
if (p >= end && desc)
Writef(" ; %s", desc);
WriteChar('\n');
}
}
MemoryStream::MemoryStream() : Stream(&writer_) {}
FileStream::FileStream(const char* filename)
: Stream(&writer_), writer_(filename) {}
FileStream::FileStream(FILE* file) : Stream(&writer_), writer_(file) {}
// static
std::unique_ptr<FileStream> FileStream::CreateStdout() {
return std::unique_ptr<FileStream>(new FileStream(stdout));
}
// static
std::unique_ptr<FileStream> FileStream::CreateStderr() {
return std::unique_ptr<FileStream>(new FileStream(stderr));
}
} // namespace wabt
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