stringpiece.cpp revision b0ac937921a2c196d8b9da665135bf6ba01a1ccf
1b0ac937921a2c196d8b9da665135bf6ba01a1ccfJean-Baptiste Queru// Copyright (C) 2009, International Business Machines 2b0ac937921a2c196d8b9da665135bf6ba01a1ccfJean-Baptiste Queru// Corporation and others. All Rights Reserved. 3b0ac937921a2c196d8b9da665135bf6ba01a1ccfJean-Baptiste Queru// 4b0ac937921a2c196d8b9da665135bf6ba01a1ccfJean-Baptiste Queru// Copyright 2004 and onwards Google Inc. 5b0ac937921a2c196d8b9da665135bf6ba01a1ccfJean-Baptiste Queru// 6b0ac937921a2c196d8b9da665135bf6ba01a1ccfJean-Baptiste Queru// Author: wilsonh@google.com (Wilson Hsieh) 7b0ac937921a2c196d8b9da665135bf6ba01a1ccfJean-Baptiste Queru// 8b0ac937921a2c196d8b9da665135bf6ba01a1ccfJean-Baptiste Queru 9b0ac937921a2c196d8b9da665135bf6ba01a1ccfJean-Baptiste Queru#include "unicode/utypes.h" 10b0ac937921a2c196d8b9da665135bf6ba01a1ccfJean-Baptiste Queru#include "unicode/stringpiece.h" 11b0ac937921a2c196d8b9da665135bf6ba01a1ccfJean-Baptiste Queru#include "cstring.h" 12b0ac937921a2c196d8b9da665135bf6ba01a1ccfJean-Baptiste Queru 13b0ac937921a2c196d8b9da665135bf6ba01a1ccfJean-Baptiste QueruU_NAMESPACE_BEGIN 14b0ac937921a2c196d8b9da665135bf6ba01a1ccfJean-Baptiste Queru 15b0ac937921a2c196d8b9da665135bf6ba01a1ccfJean-Baptiste QueruStringPiece::StringPiece(const char* str) 16b0ac937921a2c196d8b9da665135bf6ba01a1ccfJean-Baptiste Queru : ptr_(str), length_((str == NULL) ? 0 : static_cast<int32_t>(uprv_strlen(str))) { } 17b0ac937921a2c196d8b9da665135bf6ba01a1ccfJean-Baptiste Queru 18b0ac937921a2c196d8b9da665135bf6ba01a1ccfJean-Baptiste QueruStringPiece::StringPiece(const StringPiece& x, int32_t pos) { 19b0ac937921a2c196d8b9da665135bf6ba01a1ccfJean-Baptiste Queru if (pos < 0) { 20b0ac937921a2c196d8b9da665135bf6ba01a1ccfJean-Baptiste Queru pos = 0; 21b0ac937921a2c196d8b9da665135bf6ba01a1ccfJean-Baptiste Queru } else if (pos > x.length_) { 22b0ac937921a2c196d8b9da665135bf6ba01a1ccfJean-Baptiste Queru pos = x.length_; 23b0ac937921a2c196d8b9da665135bf6ba01a1ccfJean-Baptiste Queru } 24b0ac937921a2c196d8b9da665135bf6ba01a1ccfJean-Baptiste Queru ptr_ = x.ptr_ + pos; 25b0ac937921a2c196d8b9da665135bf6ba01a1ccfJean-Baptiste Queru length_ = x.length_ - pos; 26b0ac937921a2c196d8b9da665135bf6ba01a1ccfJean-Baptiste Queru} 27b0ac937921a2c196d8b9da665135bf6ba01a1ccfJean-Baptiste Queru 28b0ac937921a2c196d8b9da665135bf6ba01a1ccfJean-Baptiste QueruStringPiece::StringPiece(const StringPiece& x, int32_t pos, int32_t len) { 29b0ac937921a2c196d8b9da665135bf6ba01a1ccfJean-Baptiste Queru if (pos < 0) { 30b0ac937921a2c196d8b9da665135bf6ba01a1ccfJean-Baptiste Queru pos = 0; 31b0ac937921a2c196d8b9da665135bf6ba01a1ccfJean-Baptiste Queru } else if (pos > x.length_) { 32b0ac937921a2c196d8b9da665135bf6ba01a1ccfJean-Baptiste Queru pos = x.length_; 33b0ac937921a2c196d8b9da665135bf6ba01a1ccfJean-Baptiste Queru } 34b0ac937921a2c196d8b9da665135bf6ba01a1ccfJean-Baptiste Queru if (len < 0) { 35b0ac937921a2c196d8b9da665135bf6ba01a1ccfJean-Baptiste Queru len = 0; 36b0ac937921a2c196d8b9da665135bf6ba01a1ccfJean-Baptiste Queru } else if (len > x.length_ - pos) { 37b0ac937921a2c196d8b9da665135bf6ba01a1ccfJean-Baptiste Queru len = x.length_ - pos; 38b0ac937921a2c196d8b9da665135bf6ba01a1ccfJean-Baptiste Queru } 39b0ac937921a2c196d8b9da665135bf6ba01a1ccfJean-Baptiste Queru ptr_ = x.ptr_ + pos; 40b0ac937921a2c196d8b9da665135bf6ba01a1ccfJean-Baptiste Queru length_ = len; 41b0ac937921a2c196d8b9da665135bf6ba01a1ccfJean-Baptiste Queru} 42b0ac937921a2c196d8b9da665135bf6ba01a1ccfJean-Baptiste Queru 43b0ac937921a2c196d8b9da665135bf6ba01a1ccfJean-Baptiste Queru/* Microsft Visual Studios <= 8.0 complains about redefinition of this 44b0ac937921a2c196d8b9da665135bf6ba01a1ccfJean-Baptiste Queru * static const class variable. However, the C++ standard states that this 45b0ac937921a2c196d8b9da665135bf6ba01a1ccfJean-Baptiste Queru * definition is correct. Perhaps there is a bug in the Microsoft compiler. 46b0ac937921a2c196d8b9da665135bf6ba01a1ccfJean-Baptiste Queru * This is not an issue on any other compilers (that we know of) including 47b0ac937921a2c196d8b9da665135bf6ba01a1ccfJean-Baptiste Queru * Visual Studios 9.0. 48b0ac937921a2c196d8b9da665135bf6ba01a1ccfJean-Baptiste Queru * Cygwin with MSVC 9.0 also complains here about redefinition. 49b0ac937921a2c196d8b9da665135bf6ba01a1ccfJean-Baptiste Queru */ 50b0ac937921a2c196d8b9da665135bf6ba01a1ccfJean-Baptiste Queru#if (!defined(_MSC_VER) || (_MSC_VER >= 1500)) && !defined(CYGWINMSVC) 51b0ac937921a2c196d8b9da665135bf6ba01a1ccfJean-Baptiste Queruconst int32_t StringPiece::npos; 52b0ac937921a2c196d8b9da665135bf6ba01a1ccfJean-Baptiste Queru#endif 53b0ac937921a2c196d8b9da665135bf6ba01a1ccfJean-Baptiste Queru 54b0ac937921a2c196d8b9da665135bf6ba01a1ccfJean-Baptiste QueruU_NAMESPACE_END 55