From 05fcde5bf0caa1ceb70fef02fc88eda6f00c5ed5 Mon Sep 17 00:00:00 2001
From: Qi Liu <liuq901@163.com>
Date: Wed, 9 Mar 2016 11:58:13 +0800
Subject: add recipe

---
 lua/reader.lua | 112 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 112 insertions(+)
 create mode 100644 lua/reader.lua

(limited to 'lua/reader.lua')

diff --git a/lua/reader.lua b/lua/reader.lua
new file mode 100644
index 0000000..2e51a9c
--- /dev/null
+++ b/lua/reader.lua
@@ -0,0 +1,112 @@
+local Reader = nerv.class('nerv.Reader')
+
+function Reader:__init(vocab_file, input_file)
+    self:get_vocab(vocab_file)
+    self:get_seq(input_file)
+end
+
+function Reader:get_vocab(vocab_file)
+    local f = io.open(vocab_file, 'r')
+    local id = 0
+    self.vocab = {}
+    while true do
+        local word = f:read()
+        if word == nil then
+            break
+        end
+        self.vocab[word] = id
+        id = id + 1
+    end
+    self.size = id
+end
+
+function Reader:split(s, t)
+    local ret = {}
+    for x in (s .. t):gmatch('(.-)' .. t) do
+        table.insert(ret, x)
+    end
+    return ret
+end
+
+function Reader:get_seq(input_file)
+    local f = io.open(input_file, 'r')
+    self.seq = {}
+    while true do
+        local seq = f:read()
+        if seq == nil then
+            break
+        end
+        seq = self:split(seq, ' ')
+        local tmp = {}
+        for i = 1, #seq do
+            if seq[i] ~= '' then
+                table.insert(tmp, self.vocab[seq[i]])
+            end
+        end
+        table.insert(self.seq, tmp)
+    end
+end
+
+function Reader:get_in_out(id, pos)
+    return self.seq[id][pos], self.seq[id][pos + 1], pos + 1 == #self.seq[id]
+end
+
+function Reader:get_all_batch(global_conf)
+    local data = {}
+    local pos = {}
+    local offset = 1
+    for i = 1, global_conf.batch_size do
+        pos[i] = nil
+    end
+    while true do
+        local input = {}
+        local output = {}
+        for i = 1, global_conf.chunk_size do
+            input[i] = global_conf.mmat_type(global_conf.batch_size, 1)
+            input[i]:fill(global_conf.nn_act_default)
+            output[i] = global_conf.mmat_type(global_conf.batch_size, 1)
+            output[i]:fill(global_conf.nn_act_default)
+        end
+        local seq_start = {}
+        local seq_end = {}
+        local seq_len = {}
+        for i = 1, global_conf.batch_size do
+            seq_start[i] = false
+            seq_end[i] = false
+            seq_len[i] = 0
+        end
+        local has_new = false
+        for i = 1, global_conf.batch_size do
+            if pos[i] == nil then
+                if offset < #self.seq then
+                    seq_start[i] = true
+                    pos[i] = {offset, 1}
+                    offset = offset + 1
+                end
+            end
+            if pos[i] ~= nil then
+                has_new = true
+                for j = 1, global_conf.chunk_size do
+                    local final
+                    input[j][i-1][0], output[j][i-1][0], final = self:get_in_out(pos[i][1], pos[i][2])
+                    seq_len[i] = j
+                    if final then
+                        seq_end[i] = true
+                        pos[i] = nil
+                        break
+                    end
+                    pos[i][2] = pos[i][2] + 1
+                end
+            end
+        end
+        if not has_new then
+            break
+        end
+        for i = 1, global_conf.chunk_size do
+            input[i] = global_conf.cumat_type.new_from_host(input[i])
+            output[i] = global_conf.cumat_type.new_from_host(output[i])
+        end
+        table.insert(data, {input = input, output = output, seq_start = seq_start, seq_end = seq_end, seq_len = seq_len})
+    end
+    return data
+end
-- 
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