LCOV - code coverage report
Current view: top level - src - ostreams.cc (source / functions) Hit Total Coverage
Test: app.info Lines: 46 56 82.1 %
Date: 2019-04-17 Functions: 16 25 64.0 %

          Line data    Source code
       1             : // Copyright 2014 the V8 project authors. All rights reserved.
       2             : // Use of this source code is governed by a BSD-style license that can be
       3             : // found in the LICENSE file.
       4             : 
       5             : #include "src/ostreams.h"
       6             : #include "src/objects.h"
       7             : #include "src/objects/string.h"
       8             : 
       9             : #if V8_OS_WIN
      10             : #include <windows.h>
      11             : #if _MSC_VER < 1900
      12             : #define snprintf sprintf_s
      13             : #endif
      14             : #endif
      15             : 
      16             : #if defined(ANDROID) && !defined(V8_ANDROID_LOG_STDOUT)
      17             : #define LOG_TAG "v8"
      18             : #include <android/log.h>  // NOLINT
      19             : #endif
      20             : 
      21             : namespace v8 {
      22             : namespace internal {
      23             : 
      24           0 : DbgStreamBuf::DbgStreamBuf() { setp(data_, data_ + sizeof(data_)); }
      25             : 
      26           0 : DbgStreamBuf::~DbgStreamBuf() { sync(); }
      27             : 
      28           0 : int DbgStreamBuf::overflow(int c) {
      29             : #if V8_OS_WIN
      30             :   if (!IsDebuggerPresent()) {
      31             :     return 0;
      32             :   }
      33             : 
      34             :   sync();
      35             : 
      36             :   if (c != EOF) {
      37             :     if (pbase() == epptr()) {
      38             :       auto as_char = static_cast<char>(c);
      39             :       OutputDebugStringA(&as_char);
      40             :     } else {
      41             :       sputc(static_cast<char>(c));
      42             :     }
      43             :   }
      44             : #endif
      45           0 :   return 0;
      46             : }
      47             : 
      48           0 : int DbgStreamBuf::sync() {
      49             : #if V8_OS_WIN
      50             :   if (!IsDebuggerPresent()) {
      51             :     return 0;
      52             :   }
      53             : 
      54             :   if (pbase() != pptr()) {
      55             :     OutputDebugStringA(std::string(pbase(), static_cast<std::string::size_type>(
      56             :                                                 pptr() - pbase()))
      57             :                            .c_str());
      58             :     setp(pbase(), epptr());
      59             :   }
      60             : #endif
      61           0 :   return 0;
      62             : }
      63             : 
      64           0 : DbgStdoutStream::DbgStdoutStream() : std::ostream(&streambuf_) {}
      65             : 
      66      557071 : OFStreamBase::OFStreamBase(FILE* f) : f_(f) {}
      67             : 
      68       48859 : int OFStreamBase::sync() {
      69       48859 :   std::fflush(f_);
      70       48859 :   return 0;
      71             : }
      72             : 
      73             : 
      74       52485 : OFStreamBase::int_type OFStreamBase::overflow(int_type c) {
      75       52485 :   return (c != EOF) ? std::fputc(c, f_) : c;
      76             : }
      77             : 
      78             : 
      79    16482454 : std::streamsize OFStreamBase::xsputn(const char* s, std::streamsize n) {
      80             :   return static_cast<std::streamsize>(
      81    16482454 :       std::fwrite(s, 1, static_cast<size_t>(n), f_));
      82             : }
      83             : 
      84     1183705 : OFStream::OFStream(FILE* f) : std::ostream(nullptr), buf_(f) {
      85             :   DCHECK_NOT_NULL(f);
      86      557071 :   rdbuf(&buf_);
      87      557059 : }
      88             : 
      89             : #if defined(ANDROID) && !defined(V8_ANDROID_LOG_STDOUT)
      90             : AndroidLogStream::~AndroidLogStream() {
      91             :   // If there is anything left in the line buffer, print it now, even though it
      92             :   // was not terminated by a newline.
      93             :   if (!line_buffer_.empty()) {
      94             :     __android_log_write(ANDROID_LOG_INFO, LOG_TAG, line_buffer_.c_str());
      95             :   }
      96             : }
      97             : 
      98             : std::streamsize AndroidLogStream::xsputn(const char* s, std::streamsize n) {
      99             :   const char* const e = s + n;
     100             :   while (s < e) {
     101             :     const char* newline = reinterpret_cast<const char*>(memchr(s, '\n', e - s));
     102             :     size_t line_chars = (newline ? newline : e) - s;
     103             :     line_buffer_.append(s, line_chars);
     104             :     // Without terminating newline, keep the characters in the buffer for the
     105             :     // next invocation.
     106             :     if (!newline) break;
     107             :     // Otherwise, write out the first line, then continue.
     108             :     __android_log_write(ANDROID_LOG_INFO, LOG_TAG, line_buffer_.c_str());
     109             :     line_buffer_.clear();
     110             :     s = newline + 1;
     111             :   }
     112             :   return n;
     113             : }
     114             : #endif
     115             : 
     116             : namespace {
     117             : 
     118             : // Locale-independent predicates.
     119       53093 : bool IsPrint(uint16_t c) { return 0x20 <= c && c <= 0x7E; }
     120           0 : bool IsSpace(uint16_t c) { return (0x9 <= c && c <= 0xD) || c == 0x20; }
     121       91224 : bool IsOK(uint16_t c) { return (IsPrint(c) || IsSpace(c)) && c != '\\'; }
     122             : 
     123             : 
     124        7481 : std::ostream& PrintUC16(std::ostream& os, uint16_t c, bool (*pred)(uint16_t)) {
     125             :   char buf[10];
     126        7481 :   const char* format = pred(c) ? "%c" : (c <= 0xFF) ? "\\x%02x" : "\\u%04x";
     127             :   snprintf(buf, sizeof(buf), format, c);
     128        7481 :   return os << buf;
     129             : }
     130             : 
     131       45612 : std::ostream& PrintUC16ForJSON(std::ostream& os, uint16_t c,
     132             :                                bool (*pred)(uint16_t)) {
     133             :   // JSON does not allow \x99; must use \u0099.
     134             :   char buf[10];
     135       45612 :   const char* format = pred(c) ? "%c" : "\\u%04x";
     136             :   snprintf(buf, sizeof(buf), format, c);
     137       45612 :   return os << buf;
     138             : }
     139             : 
     140         505 : std::ostream& PrintUC32(std::ostream& os, int32_t c, bool (*pred)(uint16_t)) {
     141         505 :   if (c <= String::kMaxUtf16CodeUnit) {
     142         485 :     return PrintUC16(os, static_cast<uint16_t>(c), pred);
     143             :   }
     144             :   char buf[13];
     145             :   snprintf(buf, sizeof(buf), "\\u{%06x}", c);
     146          20 :   return os << buf;
     147             : }
     148             : 
     149             : }  // namespace
     150             : 
     151             : 
     152           0 : std::ostream& operator<<(std::ostream& os, const AsReversiblyEscapedUC16& c) {
     153           0 :   return PrintUC16(os, c.value, IsOK);
     154             : }
     155             : 
     156             : 
     157       45883 : std::ostream& operator<<(std::ostream& os, const AsEscapedUC16ForJSON& c) {
     158       46154 :   if (c.value == '\n') return os << "\\n";
     159       45612 :   if (c.value == '\r') return os << "\\r";
     160       45612 :   if (c.value == '\t') return os << "\\t";
     161       45612 :   if (c.value == '\"') return os << "\\\"";
     162       45612 :   return PrintUC16ForJSON(os, c.value, IsOK);
     163             : }
     164             : 
     165             : 
     166        6996 : std::ostream& operator<<(std::ostream& os, const AsUC16& c) {
     167        6996 :   return PrintUC16(os, c.value, IsPrint);
     168             : }
     169             : 
     170             : 
     171         505 : std::ostream& operator<<(std::ostream& os, const AsUC32& c) {
     172         505 :   return PrintUC32(os, c.value, IsPrint);
     173             : }
     174             : 
     175      211623 : std::ostream& operator<<(std::ostream& os, const AsHex& hex) {
     176             :   // Each byte uses up to two characters. Plus two characters for the prefix,
     177             :   // plus null terminator.
     178             :   DCHECK_GE(sizeof(hex.value) * 2, hex.min_width);
     179             :   static constexpr size_t kMaxHexLength = 3 + sizeof(hex.value) * 2;
     180             :   char buf[kMaxHexLength];
     181      211623 :   snprintf(buf, kMaxHexLength, "%s%.*" PRIx64, hex.with_prefix ? "0x" : "",
     182      211623 :            hex.min_width, hex.value);
     183      211623 :   return os << buf;
     184             : }
     185             : 
     186          18 : std::ostream& operator<<(std::ostream& os, const AsHexBytes& hex) {
     187          18 :   uint8_t bytes = hex.min_bytes;
     188          32 :   while (bytes < sizeof(hex.value) && (hex.value >> (bytes * 8) != 0)) ++bytes;
     189         102 :   for (uint8_t b = 0; b < bytes; ++b) {
     190          42 :     if (b) os << " ";
     191             :     uint8_t printed_byte =
     192          42 :         hex.byte_order == AsHexBytes::kLittleEndian ? b : bytes - b - 1;
     193          84 :     os << AsHex((hex.value >> (8 * printed_byte)) & 0xFF, 2);
     194             :   }
     195          18 :   return os;
     196             : }
     197             : 
     198             : }  // namespace internal
     199      122004 : }  // namespace v8
     200             : 
     201             : #undef snprintf
     202             : #undef LOG_TAG

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