src/system/libroot/os/PathBuffer.h

   1 /*
   2  * Copyright 2013, Ingo Weinhold, ingo_weinhold@gmx.de.
   3  * Distributed under the terms of the MIT License.
   4  */
   5 #ifndef PATH_BUFFER_H
   6 #define PATH_BUFFER_H
   7
   8
   9 #include <string.h>
  10
  11 #include <algorithm>
  12
  13
  14 namespace {
  15
  16 struct PathBuffer {
  17         PathBuffer()
  18                 :
  19                 fBuffer(NULL),
  20                 fSize(0),
  21                 fLength(0)
  22         {
  23         }
  24
  25         PathBuffer(char* buffer, size_t size, size_t length = 0)
  26         {
  27                 SetTo(buffer, size, length);
  28         }
  29
  30         void SetTo(char* buffer, size_t size, size_t length = 0)
  31         {
  32                 fBuffer = buffer;
  33                 fSize = size;
  34                 fLength = length;
  35                 if (fLength < fSize)
  36                         fBuffer[fLength] = '\0';
  37         }
  38
  39         bool Append(const char* toAppend, size_t length)
  40         {
  41                 if (length > 0 && fLength + 1 < fSize) {
  42                         size_t toCopy = std::min(length, fSize - fLength - 1);
  43                         memcpy(fBuffer + fLength, toAppend, toCopy);
  44                         fBuffer[fLength + toCopy] = '\0';
  45                 }
  46
  47                 fLength += length;
  48                 return fLength < fSize;
  49         }
  50
  51         bool Append(const char* toAppend)
  52         {
  53                 return Append(toAppend, strlen(toAppend));
  54         }
  55
  56         bool Append(char c)
  57         {
  58                 return Append(&c, 1);
  59         }
  60
  61         size_t Length() const
  62         {
  63                 return fLength;
  64         }
  65
  66 private:
  67         char*   fBuffer;
  68         size_t  fSize;
  69         size_t  fLength;
  70 };
  71
  72 }
  73
  74
  75 #endif  // PATH_BUFFER_H