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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.
*/
#ifndef WASM_STREAM_H_
#define WASM_STREAM_H_
#include <stdio.h>
#include "wasm-common.h"
#include "wasm-writer.h"
typedef struct WasmStream {
WasmWriter* writer;
size_t offset;
WasmResult result;
/* if non-NULL, log all writes to this stream */
struct WasmStream* log_stream;
} WasmStream;
typedef struct WasmFileStream {
WasmStream base;
WasmFileWriter writer;
} WasmFileStream;
/* whether to display the ASCII characters in the debug output for
* wasm_write_memory */
typedef enum WasmPrintChars {
WASM_DONT_PRINT_CHARS,
WASM_PRINT_CHARS,
} WasmPrintChars;
WASM_EXTERN_C_BEGIN
void wasm_init_stream(WasmStream* stream,
WasmWriter* writer,
WasmStream* log_stream);
void wasm_init_file_stream_from_existing(WasmFileStream* stream, FILE* file);
WasmStream* wasm_init_stdout_stream(void);
WasmStream* wasm_init_stderr_stream(void);
/* helper functions for writing to a WasmStream. the |desc| parameter is
* optional, and will be appended to the log stream if |stream.log_stream| is
* non-NULL. */
void wasm_write_data_at(WasmStream*,
size_t offset,
const void* src,
size_t size,
WasmPrintChars print_chars,
const char* desc);
void wasm_write_data(WasmStream*,
const void* src,
size_t size,
const char* desc);
void wasm_move_data(WasmStream*,
size_t dst_offset,
size_t src_offset,
size_t size);
void WASM_PRINTF_FORMAT(2, 3) wasm_writef(WasmStream*, const char* format, ...);
/* specified as uint32_t instead of uint8_t so we can check if the value given
* is in range before wrapping */
void wasm_write_u8(WasmStream*, uint32_t value, const char* desc);
void wasm_write_u32(WasmStream*, uint32_t value, const char* desc);
void wasm_write_u64(WasmStream*, uint64_t value, const char* desc);
static WASM_INLINE void wasm_write_char(WasmStream* stream, char c) {
wasm_write_u8(stream, c, NULL);
}
/* dump memory as text, similar to the xxd format */
void wasm_write_memory_dump(WasmStream*,
const void* start,
size_t size,
size_t offset,
WasmPrintChars print_chars,
const char* desc);
static WASM_INLINE void wasm_write_output_buffer_memory_dump(
WasmStream* stream,
struct WasmOutputBuffer* buf) {
wasm_write_memory_dump(stream, buf->start, buf->size, 0,
WASM_DONT_PRINT_CHARS, NULL);
}
WASM_EXTERN_C_END
#endif /* WASM_STREAM_H_ */
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