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comparison: xpcom/string/src/nsTSubstringTuple.cpp
xpcom/string/src/nsTSubstringTuple.cpp
- changeset 0
- 6474c204b198
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| -1:000000000000 | 0:f05f67fd1409 |
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| 1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ | |
| 2 /* vim:set ts=2 sw=2 sts=2 et cindent: */ | |
| 3 /* This Source Code Form is subject to the terms of the Mozilla Public | |
| 4 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 6 | |
| 7 | |
| 8 /** | |
| 9 * computes the aggregate string length | |
| 10 */ | |
| 11 | |
| 12 nsTSubstringTuple_CharT::size_type | |
| 13 nsTSubstringTuple_CharT::Length() const | |
| 14 { | |
| 15 uint32_t len; | |
| 16 if (mHead) | |
| 17 len = mHead->Length(); | |
| 18 else | |
| 19 len = TO_SUBSTRING(mFragA).Length(); | |
| 20 | |
| 21 return len + TO_SUBSTRING(mFragB).Length(); | |
| 22 } | |
| 23 | |
| 24 | |
| 25 /** | |
| 26 * writes the aggregate string to the given buffer. bufLen is assumed | |
| 27 * to be equal to or greater than the value returned by the Length() | |
| 28 * method. the string written to |buf| is not null-terminated. | |
| 29 */ | |
| 30 | |
| 31 void | |
| 32 nsTSubstringTuple_CharT::WriteTo( char_type *buf, uint32_t bufLen ) const | |
| 33 { | |
| 34 const substring_type& b = TO_SUBSTRING(mFragB); | |
| 35 | |
| 36 NS_ASSERTION(bufLen >= b.Length(), "buffer too small"); | |
| 37 uint32_t headLen = bufLen - b.Length(); | |
| 38 if (mHead) | |
| 39 { | |
| 40 mHead->WriteTo(buf, headLen); | |
| 41 } | |
| 42 else | |
| 43 { | |
| 44 const substring_type& a = TO_SUBSTRING(mFragA); | |
| 45 | |
| 46 NS_ASSERTION(a.Length() == headLen, "buffer incorrectly sized"); | |
| 47 char_traits::copy(buf, a.Data(), a.Length()); | |
| 48 } | |
| 49 | |
| 50 char_traits::copy(buf + headLen, b.Data(), b.Length()); | |
| 51 | |
| 52 #if 0 | |
| 53 // we need to write out data into |buf|, ending at |buf+bufLen|. so our | |
| 54 // data needs to precede |buf+bufLen| exactly. we trust that the buffer | |
| 55 // was properly sized! | |
| 56 | |
| 57 const substring_type& b = TO_SUBSTRING(mFragB); | |
| 58 | |
| 59 NS_ASSERTION(bufLen >= b.Length(), "buffer is too small"); | |
| 60 char_traits::copy(buf + bufLen - b.Length(), b.Data(), b.Length()); | |
| 61 | |
| 62 bufLen -= b.Length(); | |
| 63 | |
| 64 if (mHead) | |
| 65 { | |
| 66 mHead->WriteTo(buf, bufLen); | |
| 67 } | |
| 68 else | |
| 69 { | |
| 70 const substring_type& a = TO_SUBSTRING(mFragA); | |
| 71 NS_ASSERTION(bufLen == a.Length(), "buffer is too small"); | |
| 72 char_traits::copy(buf, a.Data(), a.Length()); | |
| 73 } | |
| 74 #endif | |
| 75 } | |
| 76 | |
| 77 | |
| 78 /** | |
| 79 * returns true if this tuple is dependent on (i.e., overlapping with) | |
| 80 * the given char sequence. | |
| 81 */ | |
| 82 | |
| 83 bool | |
| 84 nsTSubstringTuple_CharT::IsDependentOn( const char_type *start, const char_type *end ) const | |
| 85 { | |
| 86 // we start with the right-most fragment since it is faster to check. | |
| 87 | |
| 88 if (TO_SUBSTRING(mFragB).IsDependentOn(start, end)) | |
| 89 return true; | |
| 90 | |
| 91 if (mHead) | |
| 92 return mHead->IsDependentOn(start, end); | |
| 93 | |
| 94 return TO_SUBSTRING(mFragA).IsDependentOn(start, end); | |
| 95 } |
