diff options
| author | antonovvk <[email protected]> | 2022-02-10 16:47:52 +0300 |
|---|---|---|
| committer | Daniil Cherednik <[email protected]> | 2022-02-10 16:47:52 +0300 |
| commit | 37de222addabbef336dcaaea5f7c7645a629fc6d (patch) | |
| tree | c0748b5dcbade83af788c0abfa89c0383d6b779c /library/cpp/diff/diff.h | |
| parent | 37a63debdc21e372d99e1808cdd31aecf75018c3 (diff) | |
Restoring authorship annotation for <[email protected]>. Commit 2 of 2.
Diffstat (limited to 'library/cpp/diff/diff.h')
| -rw-r--r-- | library/cpp/diff/diff.h | 188 |
1 files changed, 94 insertions, 94 deletions
diff --git a/library/cpp/diff/diff.h b/library/cpp/diff/diff.h index 941c93c7960..94fb00cd0b3 100644 --- a/library/cpp/diff/diff.h +++ b/library/cpp/diff/diff.h @@ -1,112 +1,112 @@ -#pragma once - +#pragma once + #include <library/cpp/lcs/lcs_via_lis.h> - + #include <util/generic/algorithm.h> #include <util/generic/array_ref.h> -#include <util/generic/strbuf.h> -#include <util/generic/vector.h> -#include <util/stream/output.h> -#include <util/string/split.h> - -namespace NDiff { - template <typename T> - struct TChunk { - TConstArrayRef<T> Left; - TConstArrayRef<T> Right; - TConstArrayRef<T> Common; - +#include <util/generic/strbuf.h> +#include <util/generic/vector.h> +#include <util/stream/output.h> +#include <util/string/split.h> + +namespace NDiff { + template <typename T> + struct TChunk { + TConstArrayRef<T> Left; + TConstArrayRef<T> Right; + TConstArrayRef<T> Common; + TChunk() = default; - - TChunk(const TConstArrayRef<T>& left, const TConstArrayRef<T>& right, const TConstArrayRef<T>& common) - : Left(left) - , Right(right) - , Common(common) - { - } - }; - - template <typename T> + + TChunk(const TConstArrayRef<T>& left, const TConstArrayRef<T>& right, const TConstArrayRef<T>& common) + : Left(left) + , Right(right) + , Common(common) + { + } + }; + + template <typename T> size_t InlineDiff(TVector<TChunk<T>>& chunks, const TConstArrayRef<T>& left, const TConstArrayRef<T>& right) { - TConstArrayRef<T> s1(left); - TConstArrayRef<T> s2(right); - - bool swapped = false; - if (s1.size() < s2.size()) { - // NLCS will silently swap strings if second string is longer - // So we swap strings here and remember the fact since it is crucial to diff - DoSwap(s1, s2); - swapped = true; - } - + TConstArrayRef<T> s1(left); + TConstArrayRef<T> s2(right); + + bool swapped = false; + if (s1.size() < s2.size()) { + // NLCS will silently swap strings if second string is longer + // So we swap strings here and remember the fact since it is crucial to diff + DoSwap(s1, s2); + swapped = true; + } + TVector<T> lcs; - NLCS::TLCSCtx<T> ctx; - NLCS::MakeLCS<T>(s1, s2, &lcs, &ctx); - - // Start points of current common and diff parts + NLCS::TLCSCtx<T> ctx; + NLCS::MakeLCS<T>(s1, s2, &lcs, &ctx); + + // Start points of current common and diff parts const T* c1 = nullptr; const T* c2 = nullptr; - const T* d1 = s1.begin(); - const T* d2 = s2.begin(); - - // End points of current common parts - const T* e1 = s1.begin(); - const T* e2 = s2.begin(); - + const T* d1 = s1.begin(); + const T* d2 = s2.begin(); + + // End points of current common parts + const T* e1 = s1.begin(); + const T* e2 = s2.begin(); + size_t dist = s1.size() - lcs.size(); - const size_t n = ctx.ResultBuffer.size(); - for (size_t i = 0; i <= n && (e1 != s1.end() || e2 != s2.end());) { - if (i < n) { - // Common character exists - // LCS is marked against positions in s2 - // Save the beginning of common part in s2 - c2 = s2.begin() + ctx.ResultBuffer[i]; - // Find the beginning of common part in s1 + const size_t n = ctx.ResultBuffer.size(); + for (size_t i = 0; i <= n && (e1 != s1.end() || e2 != s2.end());) { + if (i < n) { + // Common character exists + // LCS is marked against positions in s2 + // Save the beginning of common part in s2 + c2 = s2.begin() + ctx.ResultBuffer[i]; + // Find the beginning of common part in s1 c1 = Find(e1, s1.end(), *c2); - // Follow common substring - for (e1 = c1, e2 = c2; i < n && *e1 == *e2; ++e1, ++e2) { - ++i; - } - } else { - // No common character, common part is empty - c1 = s1.end(); - c2 = s2.end(); - e1 = s1.end(); - e2 = s2.end(); - } - - TChunk<T> chunk(TConstArrayRef<T>(d1, c1), TConstArrayRef<T>(d2, c2), TConstArrayRef<T>(c1, e1)); - if (swapped) { - DoSwap(chunk.Left, chunk.Right); - chunk.Common = TConstArrayRef<T>(c2, e2); - } - chunks.push_back(chunk); - - d1 = e1; - d2 = e2; - } + // Follow common substring + for (e1 = c1, e2 = c2; i < n && *e1 == *e2; ++e1, ++e2) { + ++i; + } + } else { + // No common character, common part is empty + c1 = s1.end(); + c2 = s2.end(); + e1 = s1.end(); + e2 = s2.end(); + } + + TChunk<T> chunk(TConstArrayRef<T>(d1, c1), TConstArrayRef<T>(d2, c2), TConstArrayRef<T>(c1, e1)); + if (swapped) { + DoSwap(chunk.Left, chunk.Right); + chunk.Common = TConstArrayRef<T>(c2, e2); + } + chunks.push_back(chunk); + + d1 = e1; + d2 = e2; + } return dist; - } - - template <typename TFormatter, typename T> + } + + template <typename TFormatter, typename T> void PrintChunks(IOutputStream& out, const TFormatter& fmt, const TVector<TChunk<T>>& chunks) { for (typename TVector<TChunk<T>>::const_iterator chunk = chunks.begin(); chunk != chunks.end(); ++chunk) { - if (!chunk->Left.empty() || !chunk->Right.empty()) { - out << fmt.Special("("); - out << fmt.Left(chunk->Left); - out << fmt.Special("|"); - out << fmt.Right(chunk->Right); - out << fmt.Special(")"); - } - out << fmt.Common(chunk->Common); - } - } - - // Without delimiters calculates character-wise diff - // With delimiters calculates token-wise diff + if (!chunk->Left.empty() || !chunk->Right.empty()) { + out << fmt.Special("("); + out << fmt.Left(chunk->Left); + out << fmt.Special("|"); + out << fmt.Right(chunk->Right); + out << fmt.Special(")"); + } + out << fmt.Common(chunk->Common); + } + } + + // Without delimiters calculates character-wise diff + // With delimiters calculates token-wise diff size_t InlineDiff(TVector<TChunk<char>>& chunks, const TStringBuf& left, const TStringBuf& right, const TString& delims = TString()); size_t InlineDiff(TVector<TChunk<wchar16>>& chunks, const TWtringBuf& left, const TWtringBuf& right, const TUtf16String& delims = TUtf16String()); - + } |
