LCOV - code coverage report
Current view: top level - src - ostreams.cc (source / functions) Hit Total Coverage
Test: app.info Lines: 46 49 93.9 %
Date: 2017-10-20 Functions: 15 22 68.2 %

          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             : #if _MSC_VER < 1900
      11             : #define snprintf sprintf_s
      12             : #endif
      13             : #endif
      14             : 
      15             : namespace v8 {
      16             : namespace internal {
      17             : 
      18      266653 : OFStreamBase::OFStreamBase(FILE* f) : f_(f) {}
      19             : 
      20             : 
      21      266653 : OFStreamBase::~OFStreamBase() {}
      22             : 
      23             : 
      24         863 : int OFStreamBase::sync() {
      25         863 :   std::fflush(f_);
      26         863 :   return 0;
      27             : }
      28             : 
      29             : 
      30         863 : OFStreamBase::int_type OFStreamBase::overflow(int_type c) {
      31         863 :   return (c != EOF) ? std::fputc(c, f_) : c;
      32             : }
      33             : 
      34             : 
      35       35753 : std::streamsize OFStreamBase::xsputn(const char* s, std::streamsize n) {
      36             :   return static_cast<std::streamsize>(
      37       35753 :       std::fwrite(s, 1, static_cast<size_t>(n), f_));
      38             : }
      39             : 
      40             : 
      41      533306 : OFStream::OFStream(FILE* f) : std::ostream(nullptr), buf_(f) {
      42             :   DCHECK_NOT_NULL(f);
      43      266653 :   rdbuf(&buf_);
      44      266653 : }
      45             : 
      46             : 
      47      533306 : OFStream::~OFStream() {}
      48             : 
      49             : 
      50             : namespace {
      51             : 
      52             : // Locale-independent predicates.
      53       12132 : bool IsPrint(uint16_t c) { return 0x20 <= c && c <= 0x7e; }
      54           0 : bool IsSpace(uint16_t c) { return (0x9 <= c && c <= 0xd) || c == 0x20; }
      55       13164 : bool IsOK(uint16_t c) { return (IsPrint(c) || IsSpace(c)) && c != '\\'; }
      56             : 
      57             : 
      58        5550 : std::ostream& PrintUC16(std::ostream& os, uint16_t c, bool (*pred)(uint16_t)) {
      59             :   char buf[10];
      60        5550 :   const char* format = pred(c) ? "%c" : (c <= 0xff) ? "\\x%02x" : "\\u%04x";
      61             :   snprintf(buf, sizeof(buf), format, c);
      62        5550 :   return os << buf;
      63             : }
      64             : 
      65        6582 : std::ostream& PrintUC16ForJSON(std::ostream& os, uint16_t c,
      66             :                                bool (*pred)(uint16_t)) {
      67             :   // JSON does not allow \x99; must use \u0099.
      68             :   char buf[10];
      69        6582 :   const char* format = pred(c) ? "%c" : "\\u%04x";
      70             :   snprintf(buf, sizeof(buf), format, c);
      71        6582 :   return os << buf;
      72             : }
      73             : 
      74        1182 : std::ostream& PrintUC32(std::ostream& os, int32_t c, bool (*pred)(uint16_t)) {
      75        1182 :   if (c <= String::kMaxUtf16CodeUnit) {
      76        1134 :     return PrintUC16(os, static_cast<uint16_t>(c), pred);
      77             :   }
      78             :   char buf[13];
      79             :   snprintf(buf, sizeof(buf), "\\u{%06x}", c);
      80          48 :   return os << buf;
      81             : }
      82             : 
      83             : }  // namespace
      84             : 
      85             : 
      86           0 : std::ostream& operator<<(std::ostream& os, const AsReversiblyEscapedUC16& c) {
      87           0 :   return PrintUC16(os, c.value, IsOK);
      88             : }
      89             : 
      90             : 
      91        6582 : std::ostream& operator<<(std::ostream& os, const AsEscapedUC16ForJSON& c) {
      92        6582 :   if (c.value == '\n') return os << "\\n";
      93        6582 :   if (c.value == '\r') return os << "\\r";
      94        6582 :   if (c.value == '\t') return os << "\\t";
      95        6582 :   if (c.value == '\"') return os << "\\\"";
      96        6582 :   return PrintUC16ForJSON(os, c.value, IsOK);
      97             : }
      98             : 
      99             : 
     100        4416 : std::ostream& operator<<(std::ostream& os, const AsUC16& c) {
     101        4416 :   return PrintUC16(os, c.value, IsPrint);
     102             : }
     103             : 
     104             : 
     105        1182 : std::ostream& operator<<(std::ostream& os, const AsUC32& c) {
     106        1182 :   return PrintUC32(os, c.value, IsPrint);
     107             : }
     108             : 
     109          53 : std::ostream& operator<<(std::ostream& os, const AsHex& hex) {
     110             :   // Each byte uses up to two characters. Plus two characters for the prefix,
     111             :   // plus null terminator.
     112             :   DCHECK_GE(sizeof(hex.value) * 2, hex.min_width);
     113             :   static constexpr size_t kMaxHexLength = 3 + sizeof(hex.value) * 2;
     114             :   char buf[kMaxHexLength];
     115             :   snprintf(buf, kMaxHexLength, "%s%.*" PRIx64, hex.with_prefix ? "0x" : "",
     116          53 :            hex.min_width, hex.value);
     117          53 :   return os << buf;
     118             : }
     119             : 
     120          18 : std::ostream& operator<<(std::ostream& os, const AsHexBytes& hex) {
     121          18 :   uint8_t bytes = hex.min_bytes;
     122          18 :   while (bytes < sizeof(hex.value) && (hex.value >> (bytes * 8) != 0)) ++bytes;
     123          42 :   for (uint8_t b = 0; b < bytes; ++b) {
     124          42 :     if (b) os << " ";
     125             :     uint8_t printed_byte =
     126          42 :         hex.byte_order == AsHexBytes::kLittleEndian ? b : bytes - b - 1;
     127          84 :     os << AsHex((hex.value >> (8 * printed_byte)) & 0xff, 2);
     128             :   }
     129          18 :   return os;
     130             : }
     131             : 
     132             : }  // namespace internal
     133             : }  // namespace v8

Generated by: LCOV version 1.10