find and replace, finally
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parent
afa0988ebc
commit
2196b7d256
184
src/Groups.jl
184
src/Groups.jl
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@ -21,6 +21,7 @@ include("words.jl")
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include("hashing.jl")
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include("freereduce.jl")
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include("arithmetic.jl")
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include("findreplace.jl")
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include("FreeGroup.jl")
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include("FPGroups.jl")
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@ -70,189 +71,6 @@ end
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end
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end
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###############################################################################
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#
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# Replacement of symbols / sub-words
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#
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issubsymbol(s::GSymbol, t::GSymbol) =
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s.id == t.id && (0 ≤ s.pow ≤ t.pow || 0 ≥ s.pow ≥ t.pow)
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function issubsymbol(s::FreeSymbol, w::GWord, sindex::Integer)
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@boundscheck 1 ≤ sindex ≤ syllablelength(w) || throw(BoundsError(w, sindex))
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return issubsymbol(s, syllables(w)[sindex])
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end
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function issubword(z::GWord, w::GWord, sindex::Integer)
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isempty(z) && return true
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@boundscheck 1 ≤ sindex ≤ syllablelength(w) || throw(BoundsError(w, sindex))
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n = syllablelength(z)
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n == 1 && return issubsymbol(first(syllables(z)), syllables(w)[sindex])
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lastindex = sindex + n - 1
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lastindex > syllablelength(w) && return false
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issubsymbol(first(z), syllables(w)[sindex]) || return false
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issubsymbol(syllables(z)[end], syllables(w)[lastindex]) || return false
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for (zidx, widx) in zip(2:n-1, sindex+1:lastindex-1)
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syllables(z)[zidx] == syllables(w)[widx] || return false
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end
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return true
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end
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"""doc
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Find the first syllable index k>=i such that Z < syllables(W)[k:k+syllablelength(Z)-1]
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"""
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function findnext(subword::GWord, word::GWord, start::Integer)
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@boundscheck 1 ≤ start ≤ syllablelength(word) || throw(BoundsError(word, start))
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isempty(subword) && return start
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stop = syllablelength(word) - syllablelength(subword) +1
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for idx in start:1:stop
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issubword(subword, word, idx) && return idx
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end
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return nothing
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end
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function findnext(s::FreeSymbol, word::GWord, start::Integer)
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@boundscheck 1 ≤ start ≤ syllablelength(word) || throw(BoundsError(word, start))
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isone(s) && return start
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stop = syllablelength(word)
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for idx in start:1:stop
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issubsymbol(s, word, idx) && return idx
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end
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return nothing
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end
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function findprev(subword::GWord, word::GWord, start::Integer)
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@boundscheck 1 ≤ start ≤ syllablelength(word) || throw(BoundsError(word, start))
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isempty(subword) && return start
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stop = 1
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for idx in start:-1:1
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issubword(subword, word, idx) && return idx
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end
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return nothing
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end
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function findprev(s::FreeSymbol, word::GWord, start::Integer)
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@boundscheck 1 ≤ start ≤ syllablelength(word) || throw(BoundsError(word, start))
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isone(s) && return start
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stop = 1
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for idx in start:-1:stop
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issubsymbol(s, word, idx) && return idx
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end
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return nothing
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end
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findfirst(subword::GWord, word::GWord) = findnext(subword, word, 1)
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findlast(subword::GWord, word::GWord) =
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findprev(subword, word, syllablelength(word)-syllablelength(subword)+1)
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function replace!(out::GW, W::GW, lhs_rhs::Pair{GS, T}; count::Integer=typemax(Int)) where
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{GS<:GSymbol, T<:GWord, GW<:GWord}
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(count == 0 || isempty(W)) && return W
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count < 0 && throw(DomainError(count, "`count` must be non-negative."))
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lhs, rhs = lhs_rhs
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sW = syllables(W)
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sW_idx = 1
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r = something(findnext(lhs, W, sW_idx), 0)
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sout = syllables(out)
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resize!(sout, 0)
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sizehint!(sout, syllablelength(W))
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c = 0
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while !iszero(r)
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append!(sout, view(sW, sW_idx:r-1))
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a, b = divrem(sW[r].pow, lhs.pow)
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if b != 0
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push!(sout, change_pow(sW[r], b))
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end
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append!(sout, repeat(syllables(rhs), a))
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sW_idx = r+1
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sW_idx > syllablelength(W) && break
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r = something(findnext(lhs, W, sW_idx), 0)
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c += 1
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c == count && break
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end
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append!(sout, sW[sW_idx:end])
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return freereduce!(out)
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end
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function replace!(out::GW, W::GW, lhs_rhs::Pair{T, T}; count::Integer=typemax(Int)) where
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{GW<:GWord, T <: GWord}
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(count == 0 || isempty(W)) && return W
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count < 0 && throw(DomainError(count, "`count` must be non-negative."))
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lhs, rhs = lhs_rhs
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lhs_slen = syllablelength(lhs)
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lhs_slen == 1 && return replace!(out, W, first(syllables(lhs))=>rhs; count=count)
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sW = syllables(W)
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sW_idx = 1
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r = something(findnext(lhs, W, sW_idx), 0)
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sout = syllables(out)
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resize!(sout, 0)
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sizehint!(sout, syllablelength(W))
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c = 0
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while !iszero(r)
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append!(sout, view(sW, sW_idx:r-1))
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exp = sW[r].pow - first(syllables(lhs)).pow
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if exp != 0
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push!(sout, change_pow(sW[r], exp))
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end
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append!(sout, syllables(rhs))
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exp = sW[r+lhs_slen-1].pow - last(syllables(lhs)).pow
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if exp != 0
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push!(sout, change_pow(sW[r+lhs_slen-1], exp))
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end
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sW_idx = r+lhs_slen
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sW_idx > syllablelength(W) && break
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r = something(findnext(lhs, W, sW_idx), 0)
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c += 1
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c == count && break
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end
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# copy the rest
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append!(sout, sW[sW_idx:end])
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return freereduce!(out)
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end
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function replace(W::GW, lhs_rhs::Pair{T, T}; count::Integer=typemax(Int)) where
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{GW<:GWord, T <: GWord}
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return replace!(one(W), W, lhs_rhs; count=count)
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end
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function replace(W::GW, subst_dict::Dict{T,T}) where {GW<:GWord, T<:GWord}
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out = W
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for toreplace in reverse!(sort!(collect(keys(subst_dict)), by=length))
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replacement = subst_dict[toreplace]
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if length(toreplace) > length(out)
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continue
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end
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out = replace(out, toreplace=>replacement)
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end
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return out
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end
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###############################################################################
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#
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# Misc
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@ -0,0 +1,182 @@
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###############################################################################
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#
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# Replacement of symbols / sub-words
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#
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issubsymbol(s::GSymbol, t::GSymbol) =
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s.id == t.id && (0 ≤ s.pow ≤ t.pow || 0 ≥ s.pow ≥ t.pow)
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function issubsymbol(s::FreeSymbol, w::GWord, sindex::Integer)
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@boundscheck 1 ≤ sindex ≤ syllablelength(w) || throw(BoundsError(w, sindex))
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return issubsymbol(s, syllables(w)[sindex])
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end
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function issubword(z::GWord, w::GWord, sindex::Integer)
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isempty(z) && return true
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@boundscheck 1 ≤ sindex ≤ syllablelength(w) || throw(BoundsError(w, sindex))
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n = syllablelength(z)
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n == 1 && return issubsymbol(first(syllables(z)), syllables(w)[sindex])
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lastindex = sindex + n - 1
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lastindex > syllablelength(w) && return false
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issubsymbol(first(z), syllables(w)[sindex]) || return false
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issubsymbol(syllables(z)[end], syllables(w)[lastindex]) || return false
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for (zidx, widx) in zip(2:n-1, sindex+1:lastindex-1)
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syllables(z)[zidx] == syllables(w)[widx] || return false
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end
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return true
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end
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"""doc
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Find the first syllable index k>=i such that Z < syllables(W)[k:k+syllablelength(Z)-1]
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"""
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function findnext(subword::GWord, word::GWord, start::Integer)
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@boundscheck 1 ≤ start ≤ syllablelength(word) || throw(BoundsError(word, start))
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isempty(subword) && return start
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stop = syllablelength(word) - syllablelength(subword) +1
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for idx in start:1:stop
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issubword(subword, word, idx) && return idx
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end
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return nothing
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end
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function findnext(s::FreeSymbol, word::GWord, start::Integer)
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@boundscheck 1 ≤ start ≤ syllablelength(word) || throw(BoundsError(word, start))
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isone(s) && return start
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stop = syllablelength(word)
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for idx in start:1:stop
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issubsymbol(s, word, idx) && return idx
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end
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return nothing
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end
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function findprev(subword::GWord, word::GWord, start::Integer)
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@boundscheck 1 ≤ start ≤ syllablelength(word) || throw(BoundsError(word, start))
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isempty(subword) && return start
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stop = 1
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for idx in start:-1:1
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issubword(subword, word, idx) && return idx
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end
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return nothing
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end
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function findprev(s::FreeSymbol, word::GWord, start::Integer)
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@boundscheck 1 ≤ start ≤ syllablelength(word) || throw(BoundsError(word, start))
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isone(s) && return start
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stop = 1
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for idx in start:-1:stop
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issubsymbol(s, word, idx) && return idx
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end
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return nothing
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end
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findfirst(subword::GWord, word::GWord) = findnext(subword, word, 1)
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findlast(subword::GWord, word::GWord) =
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findprev(subword, word, syllablelength(word)-syllablelength(subword)+1)
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function replace!(out::GW, W::GW, lhs_rhs::Pair{GS, T}; count::Integer=typemax(Int)) where
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{GS<:GSymbol, T<:GWord, GW<:GWord}
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(count == 0 || isempty(W)) && return W
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count < 0 && throw(DomainError(count, "`count` must be non-negative."))
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lhs, rhs = lhs_rhs
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sW = syllables(W)
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sW_idx = 1
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r = something(findnext(lhs, W, sW_idx), 0)
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sout = syllables(out)
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resize!(sout, 0)
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sizehint!(sout, syllablelength(W))
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c = 0
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while !iszero(r)
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append!(sout, view(sW, sW_idx:r-1))
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a, b = divrem(sW[r].pow, lhs.pow)
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if b != 0
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push!(sout, change_pow(sW[r], b))
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end
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append!(sout, repeat(syllables(rhs), a))
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sW_idx = r+1
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sW_idx > syllablelength(W) && break
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r = something(findnext(lhs, W, sW_idx), 0)
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c += 1
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c == count && break
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end
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append!(sout, sW[sW_idx:end])
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return freereduce!(out)
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end
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function replace!(out::GW, W::GW, lhs_rhs::Pair{T, T}; count::Integer=typemax(Int)) where
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{GW<:GWord, T <: GWord}
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(count == 0 || isempty(W)) && return W
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count < 0 && throw(DomainError(count, "`count` must be non-negative."))
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lhs, rhs = lhs_rhs
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lhs_slen = syllablelength(lhs)
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lhs_slen == 1 && return replace!(out, W, first(syllables(lhs))=>rhs; count=count)
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sW = syllables(W)
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sW_idx = 1
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r = something(findnext(lhs, W, sW_idx), 0)
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sout = syllables(out)
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resize!(sout, 0)
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sizehint!(sout, syllablelength(W))
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c = 0
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while !iszero(r)
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append!(sout, view(sW, sW_idx:r-1))
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exp = sW[r].pow - first(syllables(lhs)).pow
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if exp != 0
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push!(sout, change_pow(sW[r], exp))
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end
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append!(sout, syllables(rhs))
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exp = sW[r+lhs_slen-1].pow - last(syllables(lhs)).pow
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if exp != 0
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push!(sout, change_pow(sW[r+lhs_slen-1], exp))
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end
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sW_idx = r+lhs_slen
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sW_idx > syllablelength(W) && break
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r = something(findnext(lhs, W, sW_idx), 0)
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c += 1
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c == count && break
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end
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# copy the rest
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append!(sout, sW[sW_idx:end])
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return freereduce!(out)
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end
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function replace(W::GW, lhs_rhs::Pair{T, T}; count::Integer=typemax(Int)) where
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{GW<:GWord, T <: GWord}
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return replace!(one(W), W, lhs_rhs; count=count)
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end
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function replace(W::GW, subst_dict::Dict{T,T}) where {GW<:GWord, T<:GWord}
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out = W
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for toreplace in reverse!(sort!(collect(keys(subst_dict)), by=length))
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replacement = subst_dict[toreplace]
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if length(toreplace) > length(out)
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continue
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end
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out = replace(out, toreplace=>replacement)
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end
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return out
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end
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