| // Copyright 2014 the V8 project authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "src/ostreams.h" |
| #include "src/objects.h" |
| |
| #if V8_OS_WIN |
| #if _MSC_VER < 1900 |
| #define snprintf sprintf_s |
| #endif |
| #endif |
| |
| namespace v8 { |
| namespace internal { |
| |
| OFStreamBase::OFStreamBase(FILE* f) : f_(f) {} |
| |
| |
| OFStreamBase::~OFStreamBase() {} |
| |
| |
| int OFStreamBase::sync() { |
| std::fflush(f_); |
| return 0; |
| } |
| |
| |
| OFStreamBase::int_type OFStreamBase::overflow(int_type c) { |
| return (c != EOF) ? std::fputc(c, f_) : c; |
| } |
| |
| |
| std::streamsize OFStreamBase::xsputn(const char* s, std::streamsize n) { |
| return static_cast<std::streamsize>( |
| std::fwrite(s, 1, static_cast<size_t>(n), f_)); |
| } |
| |
| |
| OFStream::OFStream(FILE* f) : std::ostream(nullptr), buf_(f) { |
| DCHECK_NOT_NULL(f); |
| rdbuf(&buf_); |
| } |
| |
| |
| OFStream::~OFStream() {} |
| |
| |
| namespace { |
| |
| // Locale-independent predicates. |
| bool IsPrint(uint16_t c) { return 0x20 <= c && c <= 0x7e; } |
| bool IsSpace(uint16_t c) { return (0x9 <= c && c <= 0xd) || c == 0x20; } |
| bool IsOK(uint16_t c) { return (IsPrint(c) || IsSpace(c)) && c != '\\'; } |
| |
| |
| std::ostream& PrintUC16(std::ostream& os, uint16_t c, bool (*pred)(uint16_t)) { |
| char buf[10]; |
| const char* format = pred(c) ? "%c" : (c <= 0xff) ? "\\x%02x" : "\\u%04x"; |
| snprintf(buf, sizeof(buf), format, c); |
| return os << buf; |
| } |
| |
| std::ostream& PrintUC16ForJSON(std::ostream& os, uint16_t c, |
| bool (*pred)(uint16_t)) { |
| // JSON does not allow \x99; must use \u0099. |
| char buf[10]; |
| const char* format = pred(c) ? "%c" : "\\u%04x"; |
| snprintf(buf, sizeof(buf), format, c); |
| return os << buf; |
| } |
| |
| std::ostream& PrintUC32(std::ostream& os, int32_t c, bool (*pred)(uint16_t)) { |
| if (c <= String::kMaxUtf16CodeUnit) { |
| return PrintUC16(os, static_cast<uint16_t>(c), pred); |
| } |
| char buf[13]; |
| snprintf(buf, sizeof(buf), "\\u{%06x}", c); |
| return os << buf; |
| } |
| |
| } // namespace |
| |
| |
| std::ostream& operator<<(std::ostream& os, const AsReversiblyEscapedUC16& c) { |
| return PrintUC16(os, c.value, IsOK); |
| } |
| |
| |
| std::ostream& operator<<(std::ostream& os, const AsEscapedUC16ForJSON& c) { |
| if (c.value == '\n') return os << "\\n"; |
| if (c.value == '\r') return os << "\\r"; |
| if (c.value == '\t') return os << "\\t"; |
| if (c.value == '\"') return os << "\\\""; |
| return PrintUC16ForJSON(os, c.value, IsOK); |
| } |
| |
| |
| std::ostream& operator<<(std::ostream& os, const AsUC16& c) { |
| return PrintUC16(os, c.value, IsPrint); |
| } |
| |
| |
| std::ostream& operator<<(std::ostream& os, const AsUC32& c) { |
| return PrintUC32(os, c.value, IsPrint); |
| } |
| |
| std::ostream& operator<<(std::ostream& os, const AsHex& hex) { |
| char buf[20]; |
| snprintf(buf, sizeof(buf), "%.*" PRIx64, hex.min_width, hex.value); |
| return os << buf; |
| } |
| |
| } // namespace internal |
| } // namespace v8 |