diff options
Diffstat (limited to 'src/wasm-stream.c')
| -rw-r--r-- | src/wasm-stream.c | 138 |
1 files changed, 138 insertions, 0 deletions
diff --git a/src/wasm-stream.c b/src/wasm-stream.c new file mode 100644 index 00000000..0023cfb5 --- /dev/null +++ b/src/wasm-stream.c @@ -0,0 +1,138 @@ +/* + * 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 "wasm-stream.h" + +#include <assert.h> +#include <ctype.h> + +#define DUMP_OCTETS_PER_LINE 16 +#define DUMP_OCTETS_PER_GROUP 2 + +void wasm_init_stream(WasmStream* stream, + WasmWriter* writer, + WasmStream* log_stream) { + stream->writer = writer; + stream->offset = 0; + stream->result = WASM_OK; + stream->log_stream = log_stream; +} + +void wasm_write_data_at(WasmStream* stream, + size_t offset, + const void* src, + size_t size, + WasmPrintChars print_chars, + const char* desc) { + if (WASM_FAILED(stream->result)) + return; + if (stream->log_stream) { + wasm_write_memory_dump(stream->log_stream, src, size, offset, print_chars, + desc); + } + if (stream->writer->write_data) { + stream->result = stream->writer->write_data(offset, src, size, + stream->writer->user_data); + } +} + +void wasm_write_data(WasmStream* stream, + const void* src, + size_t size, + const char* desc) { + wasm_write_data_at(stream, stream->offset, src, size, WASM_DONT_PRINT_CHARS, + desc); + stream->offset += size; +} +void wasm_move_data(WasmStream* stream, + size_t dst_offset, + size_t src_offset, + size_t size) { + if (WASM_FAILED(stream->result)) + return; + if (stream->log_stream) { + wasm_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 wasm_writef(WasmStream* stream, const char* format, ...) { + WASM_SNPRINTF_ALLOCA(buffer, length, format); + wasm_write_data(stream, buffer, length, NULL); +} + +void wasm_write_u8(WasmStream* stream, uint32_t value, const char* desc) { + assert(value <= UINT8_MAX); + uint8_t value8 = value; + wasm_write_data_at(stream, stream->offset, &value8, sizeof(value8), + WASM_DONT_PRINT_CHARS, desc); + stream->offset += sizeof(value8); +} + +void wasm_write_u32(WasmStream* stream, uint32_t value, const char* desc) { + wasm_write_data_at(stream, stream->offset, &value, sizeof(value), + WASM_DONT_PRINT_CHARS, desc); + stream->offset += sizeof(value); +} + +void wasm_write_u64(WasmStream* stream, uint64_t value, const char* desc) { + wasm_write_data_at(stream, stream->offset, &value, sizeof(value), + WASM_DONT_PRINT_CHARS, desc); + stream->offset += sizeof(value); +} + +void wasm_write_memory_dump(WasmStream* stream, + const void* start, + size_t size, + size_t offset, + WasmPrintChars print_chars, + const char* desc) { + const uint8_t* p = 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; + wasm_writef(stream, "%07" PRIzx ": ", (size_t)p - (size_t)start + offset); + while (p < line_end) { + int i; + for (i = 0; i < DUMP_OCTETS_PER_GROUP; ++i, ++p) { + if (p < end) { + wasm_writef(stream, "%02x", *p); + } else { + wasm_write_char(stream, ' '); + wasm_write_char(stream, ' '); + } + } + wasm_write_char(stream, ' '); + } + + wasm_write_char(stream, ' '); + p = line; + int i; + for (i = 0; i < DUMP_OCTETS_PER_LINE && p < end; ++i, ++p) + if (print_chars) + wasm_write_char(stream, isprint(*p) ? *p : '.'); + /* if there are multiple lines, only print the desc on the last one */ + if (p >= end && desc) + wasm_writef(stream, " ; %s", desc); + wasm_write_char(stream, '\n'); + } +} |