diff options
Diffstat (limited to '3rdparty/lzma/CPP/Common/DynLimBuf.cpp')
-rw-r--r-- | 3rdparty/lzma/CPP/Common/DynLimBuf.cpp | 93 |
1 files changed, 93 insertions, 0 deletions
diff --git a/3rdparty/lzma/CPP/Common/DynLimBuf.cpp b/3rdparty/lzma/CPP/Common/DynLimBuf.cpp new file mode 100644 index 00000000000..1d92af39942 --- /dev/null +++ b/3rdparty/lzma/CPP/Common/DynLimBuf.cpp @@ -0,0 +1,93 @@ +// Common/DynLimBuf.cpp + +#include "StdAfx.h" + +#include "DynLimBuf.h" +#include "MyString.h" + +CDynLimBuf::CDynLimBuf(size_t limit) throw() +{ + _chars = NULL; + _pos = 0; + _size = 0; + _sizeLimit = limit; + _error = true; + unsigned size = 1 << 4; + if (size > limit) + size = (unsigned)limit; + _chars = (Byte *)MyAlloc(size); + if (_chars) + { + _size = size; + _error = false; + } +} + +CDynLimBuf & CDynLimBuf::operator+=(char c) throw() +{ + if (_error) + return *this; + if (_size == _pos) + { + size_t n = _sizeLimit - _size; + if (n == 0) + { + _error = true; + return *this; + } + if (n > _size) + n = _size; + + n += _pos; + + Byte *newBuf = (Byte *)MyAlloc(n); + if (!newBuf) + { + _error = true; + return *this; + } + memcpy(newBuf, _chars, _pos); + MyFree(_chars); + _chars = newBuf; + _size = n; + } + _chars[_pos++] = (Byte)c; + return *this; +} + +CDynLimBuf &CDynLimBuf::operator+=(const char *s) throw() +{ + if (_error) + return *this; + unsigned len = MyStringLen(s); + size_t rem = _sizeLimit - _pos; + if (rem < len) + { + len = (unsigned)rem; + _error = true; + } + if (_size - _pos < len) + { + size_t n = _pos + len; + if (n - _size < _size) + { + n = _sizeLimit; + if (n - _size > _size) + n = _size * 2; + } + + Byte *newBuf = (Byte *)MyAlloc(n); + if (!newBuf) + { + _error = true; + return *this; + } + memcpy(newBuf, _chars, _pos); + MyFree(_chars); + _chars = newBuf; + _size = n; + } + memcpy(_chars + _pos, s, len); + _pos += len; + return *this; +} |