cf-string-osx.cpp
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1 /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
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4  *
5  * This file is part of ndn-cxx library (NDN C++ library with eXperimental eXtensions).
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21 
23 
24 namespace ndn {
25 namespace detail {
26 namespace cfstring {
27 
29 fromBuffer(const uint8_t* buf, size_t buflen)
30 {
31  CFStringRef cfStr = CFStringCreateWithBytes(kCFAllocatorDefault, buf, buflen, kCFStringEncodingUTF8, false);
32  if (cfStr == nullptr) {
33  NDN_THROW(std::runtime_error("Failed to create CFString from buffer"));
34  }
35  return cfStr;
36 }
37 
39 fromStdString(const std::string& str)
40 {
41  CFStringRef cfStr = CFStringCreateWithCString(kCFAllocatorDefault, str.data(), kCFStringEncodingUTF8);
42  if (cfStr == nullptr) {
43  NDN_THROW(std::runtime_error("Failed to create CFString from std::string"));
44  }
45  return cfStr;
46 }
47 
48 std::string
49 toStdString(CFStringRef cfStr)
50 {
51  const char* cStr = CFStringGetCStringPtr(cfStr, kCFStringEncodingUTF8);
52  if (cStr != nullptr) {
53  // fast path
54  return cStr;
55  }
56 
57  // reserve space for the string + null terminator
58  std::string str(CFStringGetLength(cfStr) + 1, '\0');
59  // copy the CFString into the std::string buffer
60  if (!CFStringGetCString(cfStr, &str.front(), str.size(), kCFStringEncodingUTF8)) {
61  NDN_THROW(std::runtime_error("CFString to std::string conversion failed"));
62  }
63  // drop the null terminator, std::string doesn't need it
64  str.pop_back();
65 
66  return str;
67 }
68 
69 } // namespace cfstring
70 } // namespace detail
71 } // namespace ndn
This file contains utilities to deal with Apple Core Foundation's CFString and related types.
Helper class to wrap CoreFoundation object pointers.
#define NDN_THROW(e)
Definition: exception.hpp:61
CFReleaser< CFStringRef > fromBuffer(const uint8_t *buf, size_t buflen)
Create a CFString by copying bytes from a raw buffer.
std::string toStdString(CFStringRef cfStr)
Convert a CFString to a std::string.
CFReleaser< CFStringRef > fromStdString(const std::string &str)
Create a CFString by copying characters from a std::string.
Definition: data.cpp:25