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Add utf8 character support #12

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Add utf8 character support #12

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13 changes: 9 additions & 4 deletions util/CharSplitLMMinibatchLoader.lua
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Original file line number Diff line number Diff line change
Expand Up @@ -95,8 +95,11 @@ function CharSplitLMMinibatchLoader.text_to_tensor(in_textfile, out_vocabfile, o
print('creating vocabulary mapping...')
-- record all characters to a set
local unordered = {}
for char in rawdata:gmatch'.' do
local len = 0
-- code snippets taken from http://lua-users.org/wiki/LuaUnicode
for char in string.gfind(rawdata, "([%z\1-\127\194-\244][\128-\191]*)") do
if not unordered[char] then unordered[char] = true end
len = len + 1
end
-- sort into a table (i.e. keys become 1..N)
local ordered = {}
Expand All @@ -109,9 +112,11 @@ function CharSplitLMMinibatchLoader.text_to_tensor(in_textfile, out_vocabfile, o
end
-- construct a tensor with all the data
print('putting data into tensor...')
local data = torch.ByteTensor(#rawdata) -- store it into 1D first, then rearrange
for i=1, #rawdata do
data[i] = vocab_mapping[rawdata:sub(i, i)] -- lua has no string indexing using []
local data = torch.ShortTensor(len) -- store it into 1D first, then rearrange
local pos = 1
for char in string.gfind(rawdata, "([%z\1-\127\194-\244][\128-\191]*)") do
data[pos] = vocab_mapping[char]
pos = pos + 1
end

-- save output preprocessed files
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