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// 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& 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 PrintUC16(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);
}
} // namespace internal
} // namespace v8
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