12aa132d87
This will be used for disassembling individual wasm function for showing them in devtools. The PrintAst function now also optionally provides an offset table mapping from byte offset to line and column in the generated text. R=titzer@chromium.org, ahaas@chromium.org BUG=chromium:613110 Review-Url: https://codereview.chromium.org/2050213002 Cr-Commit-Position: refs/heads/master@{#37026}
108 lines
2.5 KiB
C++
108 lines
2.5 KiB
C++
// Copyright 2014 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "src/ostreams.h"
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#include "src/objects.h"
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#if V8_OS_WIN
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#if _MSC_VER < 1900
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#define snprintf sprintf_s
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#endif
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#endif
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namespace v8 {
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namespace internal {
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OFStreamBase::OFStreamBase(FILE* f) : f_(f) {}
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OFStreamBase::~OFStreamBase() {}
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int OFStreamBase::sync() {
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std::fflush(f_);
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return 0;
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}
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OFStreamBase::int_type OFStreamBase::overflow(int_type c) {
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return (c != EOF) ? std::fputc(c, f_) : c;
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}
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std::streamsize OFStreamBase::xsputn(const char* s, std::streamsize n) {
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return static_cast<std::streamsize>(
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std::fwrite(s, 1, static_cast<size_t>(n), f_));
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}
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OFStream::OFStream(FILE* f) : std::ostream(nullptr), buf_(f) {
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DCHECK_NOT_NULL(f);
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rdbuf(&buf_);
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}
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OFStream::~OFStream() {}
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namespace {
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// Locale-independent predicates.
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bool IsPrint(uint16_t c) { return 0x20 <= c && c <= 0x7e; }
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bool IsSpace(uint16_t c) { return (0x9 <= c && c <= 0xd) || c == 0x20; }
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bool IsOK(uint16_t c) { return (IsPrint(c) || IsSpace(c)) && c != '\\'; }
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std::ostream& PrintUC16(std::ostream& os, uint16_t c, bool (*pred)(uint16_t)) {
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char buf[10];
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const char* format = pred(c) ? "%c" : (c <= 0xff) ? "\\x%02x" : "\\u%04x";
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snprintf(buf, sizeof(buf), format, c);
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return os << buf;
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}
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std::ostream& PrintUC32(std::ostream& os, int32_t c, bool (*pred)(uint16_t)) {
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if (c <= String::kMaxUtf16CodeUnit) {
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return PrintUC16(os, static_cast<uint16_t>(c), pred);
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}
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char buf[13];
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snprintf(buf, sizeof(buf), "\\u{%06x}", c);
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return os << buf;
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}
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} // namespace
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std::ostream& operator<<(std::ostream& os, const AsReversiblyEscapedUC16& c) {
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return PrintUC16(os, c.value, IsOK);
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}
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std::ostream& operator<<(std::ostream& os, const AsEscapedUC16ForJSON& c) {
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if (c.value == '\n') return os << "\\n";
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if (c.value == '\r') return os << "\\r";
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if (c.value == '\t') return os << "\\t";
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if (c.value == '\"') return os << "\\\"";
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return PrintUC16(os, c.value, IsOK);
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}
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std::ostream& operator<<(std::ostream& os, const AsUC16& c) {
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return PrintUC16(os, c.value, IsPrint);
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}
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std::ostream& operator<<(std::ostream& os, const AsUC32& c) {
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return PrintUC32(os, c.value, IsPrint);
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}
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std::ostream& operator<<(std::ostream& os, const AsHex& hex) {
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char buf[20];
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snprintf(buf, sizeof(buf), "%.*" PRIx64, hex.min_width, hex.value);
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return os << buf;
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}
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} // namespace internal
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} // namespace v8
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