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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 <assert.h>
#include <ctype.h>
#define DUMP_OCTETS_PER_LINE 16
#define DUMP_OCTETS_PER_GROUP 2
namespace wabt {
static FileStream s_stdout_stream;
static FileStream s_stderr_stream;
void init_stream(Stream* stream, Writer* writer, Stream* log_stream) {
stream->writer = writer;
stream->offset = 0;
stream->result = Result::Ok;
stream->log_stream = log_stream;
}
void init_file_stream_from_existing(FileStream* stream, FILE* file) {
init_file_writer_existing(&stream->writer, file);
init_stream(&stream->base, &stream->writer.base, nullptr);
}
Stream* init_stdout_stream(void) {
init_file_stream_from_existing(&s_stdout_stream, stdout);
return &s_stdout_stream.base;
}
Stream* init_stderr_stream(void) {
init_file_stream_from_existing(&s_stderr_stream, stderr);
return &s_stderr_stream.base;
}
void write_data_at(Stream* stream,
size_t offset,
const void* src,
size_t size,
PrintChars print_chars,
const char* desc) {
if (WABT_FAILED(stream->result))
return;
if (stream->log_stream) {
write_memory_dump(stream->log_stream, src, size, offset, print_chars,
nullptr, desc);
}
if (stream->writer->write_data) {
stream->result = stream->writer->write_data(offset, src, size,
stream->writer->user_data);
}
}
void write_data(Stream* stream,
const void* src,
size_t size,
const char* desc) {
write_data_at(stream, stream->offset, src, size, PrintChars::No, desc);
stream->offset += size;
}
void move_data(Stream* stream,
size_t dst_offset,
size_t src_offset,
size_t size) {
if (WABT_FAILED(stream->result))
return;
if (stream->log_stream) {
writef(stream->log_stream, "; move data: [%" PRIzx ", %" PRIzx
") -> [%" PRIzx ", %" PRIzx ")\n",
src_offset, src_offset + size, dst_offset, dst_offset + size);
}
if (stream->writer->write_data) {
stream->result = stream->writer->move_data(dst_offset, src_offset, size,
stream->writer->user_data);
}
}
void writef(Stream* stream, const char* format, ...) {
WABT_SNPRINTF_ALLOCA(buffer, length, format);
write_data(stream, buffer, length, nullptr);
}
void write_u8(Stream* stream, uint32_t value, const char* desc) {
assert(value <= UINT8_MAX);
uint8_t value8 = value;
write_data_at(stream, stream->offset, &value8, sizeof(value8), PrintChars::No,
desc);
stream->offset += sizeof(value8);
}
void write_u32(Stream* stream, uint32_t value, const char* desc) {
write_data_at(stream, stream->offset, &value, sizeof(value), PrintChars::No,
desc);
stream->offset += sizeof(value);
}
void write_u64(Stream* stream, uint64_t value, const char* desc) {
write_data_at(stream, stream->offset, &value, sizeof(value), PrintChars::No,
desc);
stream->offset += sizeof(value);
}
void write_memory_dump(Stream* stream,
const void* start,
size_t size,
size_t offset,
PrintChars print_chars,
const char* prefix,
const char* desc) {
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(stream, "%s", prefix);
writef(stream, "%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(stream, "%02x", *p);
} else {
write_char(stream, ' ');
write_char(stream, ' ');
}
}
write_char(stream, ' ');
}
if (print_chars == PrintChars::Yes) {
write_char(stream, ' ');
p = line;
for (int i = 0; i < DUMP_OCTETS_PER_LINE && p < end; ++i, ++p)
write_char(stream, isprint(*p) ? *p : '.');
}
/* if there are multiple lines, only print the desc on the last one */
if (p >= end && desc)
writef(stream, " ; %s", desc);
write_char(stream, '\n');
}
}
} // namespace wabt
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