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Diffstat (limited to 'Build/source/libs/icu/icu-4.8.1/common/stringpiece.cpp')
-rw-r--r-- | Build/source/libs/icu/icu-4.8.1/common/stringpiece.cpp | 82 |
1 files changed, 82 insertions, 0 deletions
diff --git a/Build/source/libs/icu/icu-4.8.1/common/stringpiece.cpp b/Build/source/libs/icu/icu-4.8.1/common/stringpiece.cpp new file mode 100644 index 00000000000..64cd376f02c --- /dev/null +++ b/Build/source/libs/icu/icu-4.8.1/common/stringpiece.cpp @@ -0,0 +1,82 @@ +// Copyright (C) 2009-2010, International Business Machines +// Corporation and others. All Rights Reserved. +// +// Copyright 2004 and onwards Google Inc. +// +// Author: wilsonh@google.com (Wilson Hsieh) +// + +#include "unicode/utypes.h" +#include "unicode/stringpiece.h" +#include "cstring.h" +#include "cmemory.h" + +U_NAMESPACE_BEGIN + +StringPiece::StringPiece(const char* str) + : ptr_(str), length_((str == NULL) ? 0 : static_cast<int32_t>(uprv_strlen(str))) { } + +StringPiece::StringPiece(const StringPiece& x, int32_t pos) { + if (pos < 0) { + pos = 0; + } else if (pos > x.length_) { + pos = x.length_; + } + ptr_ = x.ptr_ + pos; + length_ = x.length_ - pos; +} + +StringPiece::StringPiece(const StringPiece& x, int32_t pos, int32_t len) { + if (pos < 0) { + pos = 0; + } else if (pos > x.length_) { + pos = x.length_; + } + if (len < 0) { + len = 0; + } else if (len > x.length_ - pos) { + len = x.length_ - pos; + } + ptr_ = x.ptr_ + pos; + length_ = len; +} + +void StringPiece::set(const char* str) { + ptr_ = str; + if (str != NULL) + length_ = static_cast<int32_t>(uprv_strlen(str)); + else + length_ = 0; +} + +U_EXPORT UBool U_EXPORT2 +operator==(const StringPiece& x, const StringPiece& y) { + int32_t len = x.size(); + if (len != y.size()) { + return false; + } + if (len == 0) { + return true; + } + const char* p = x.data(); + const char* p2 = y.data(); + // Test last byte in case strings share large common prefix + --len; + if (p[len] != p2[len]) return false; + // At this point we can, but don't have to, ignore the last byte. + return uprv_memcmp(p, p2, len) == 0; +} + + +/* Microsft Visual Studios <= 8.0 complains about redefinition of this + * static const class variable. However, the C++ standard states that this + * definition is correct. Perhaps there is a bug in the Microsoft compiler. + * This is not an issue on any other compilers (that we know of) including + * Visual Studios 9.0. + * Cygwin with MSVC 9.0 also complains here about redefinition. + */ +#if (!defined(_MSC_VER) || (_MSC_VER > 1500)) && !defined(CYGWINMSVC) +const int32_t StringPiece::npos; +#endif + +U_NAMESPACE_END |