正路目录

3 files changed, 294 insertions, 0 deletions

diff --git a/script/json/decode.lua b/script/json/decode.lua
new file mode 100644
index 00000000..36f8aa54
--- /dev/null
+++ b/script/json/decode.lua
@@ -0,0 +1,153 @@
+local lpeg         = require 'lpeglabel'
+local tablePack    = table.pack
+local rawset       = rawset
+local tointeger    = math.tointeger
+local tonumber     = tonumber
+local setmetatable = setmetatable
+local stringChar   = string.char
+local error        = error
+
+_ENV = nil
+
+local SaveSort
+local P  = lpeg.P
+local S  = lpeg.S
+local R  = lpeg.R
+local V  = lpeg.V
+local C  = lpeg.C
+local Ct = lpeg.Ct
+local Cc = lpeg.Cc
+local Cp = lpeg.Cp
+local Cs = lpeg.Cs
+
+local EscMap = {
+    ['t']  = '\t',
+    ['r']  = '\r',
+    ['n']  = '\n',
+    ['"']  = '"',
+    ['\\'] = '\\',
+}
+local BoolMap = {
+    ['true']  = true,
+    ['false'] = false,
+}
+
+local hashmt = {
+    __pairs = function (self)
+        local i = 1
+        local function next()
+            i = i + 1
+            local k = self[i]
+            if k == nil then
+                return
+            end
+            local v = self[k]
+            if v == nil then
+                return next()
+            end
+            return k, v
+        end
+        return next
+    end,
+    __newindex = function (self, k, v)
+        local i = 2
+        while self[i] do
+            i = i + 1
+        end
+        rawset(self, i, k)
+        rawset(self, k, v)
+    end,
+}
+
+-----------------------------------------------------------------------------
+-- JSON4Lua: JSON encoding / decoding support for the Lua language.
+-- json Module.
+-- Author: Craig Mason-Jones
+-- Homepage: http://github.com/craigmj/json4lua/
+-- Version: 1.0.0
+-- This module is released under the MIT License (MIT).
+-- Please see LICENCE.txt for details.
+--
+local function Utf8(str)
+    local n = tonumber(str, 16)
+    -- math.floor(x/2^y) == lazy right shift
+    -- a % 2^b == bitwise_and(a, (2^b)-1)
+    -- 64 = 2^6
+    -- 4096 = 2^12 (or 2^6 * 2^6)
+    local x
+    if n < 0x80 then
+        x = stringChar(n % 0x80)
+    elseif n < 0x800 then
+        -- [110x xxxx] [10xx xxxx]
+        x = stringChar(0xC0 + ((n // 64) % 0x20), 0x80 + (n % 0x40))
+    else
+        -- [1110 xxxx] [10xx xxxx] [10xx xxxx]
+        x = stringChar(0xE0 + ((n // 4096) % 0x10), 0x80 + ((n // 64) % 0x40), 0x80 + (n % 0x40))
+    end
+    return x
+end
+
+local function HashTable(patt)
+    return C(patt) / function (_, ...)
+        local hash = tablePack(...)
+        local n = hash.n
+        hash.n = nil
+        if SaveSort then
+            local max = n // 2
+            for i = 1, max do
+                local key, value = hash[2*i-1], hash[2*i]
+                hash[key] = value
+                hash[i+1] = key
+            end
+            hash[1] = nil
+            for i = max+2, max*2 do
+                hash[i] = nil
+            end
+            return setmetatable(hash, hashmt)
+        else
+            local max = n // 2
+            for i = 1, max do
+                local a = 2*i-1
+                local b = 2*i
+                local key, value = hash[a], hash[b]
+                hash[key] = value
+                hash[a] = nil
+                hash[b] = nil
+            end
+            return hash
+        end
+    end
+end
+
+local Token = P
+{
+    V'Value' * Cp(),
+    Nl     = P'\r\n' + S'\r\n',
+    Sp     = S' \t' + '//' * (1-V'Nl')^0,
+    Spnl   = (V'Sp' + V'Nl')^0,
+    Bool   = C(P'true' + P'false') / BoolMap,
+    Int    = C('0' + (P'-'^-1 * R'19' * R'09'^0)) / tointeger,
+    Float  = C(P'-'^-1 * ('0' + R'19' * R'09'^0) * '.' * R'09'^0) / tonumber,
+    Null   = P'null' * Cc(nil),
+    String = '"' * Cs(V'Char'^0) * '"',
+    Char   = V'Esc' + V'Utf8' + (1 - P'"' - P'\t' - V'Nl'),
+    Esc    = P'\\' * C(S'tnr"\\') / EscMap,
+    Utf8   = P'\\u' * C(P(4)) / Utf8,
+    Hash   = V'Spnl' * '{' * V'Spnl' * HashTable((V'Object' + P',' * V'Spnl')^0) * V'Spnl' * P'}' * V'Spnl',
+    Array  = V'Spnl' * '[' * V'Spnl' * Ct((V'Value' * V'Spnl' + P',' * V'Spnl')^0) * V'Spnl' * P']' * V'Spnl',
+    Object = V'Spnl' * V'Key' * V'Spnl' * V'Value' * V'Spnl',
+    Key    = V'String' * V'Spnl' * ':',
+    Value  = V'Hash' + V'Array' + V'Bool' + V'Null' + V'String' + V'Float' + V'Int',
+}
+
+return function (str, save_sort_)
+    SaveSort = save_sort_
+    local table, res, pos = Token:match(str)
+    if not table then
+        if not pos or pos <= #str then
+            pos = pos or 1
+            error(('没匹配完[%s][%s]\n%s'):format(pos, res, str:sub(pos, pos+100)))
+        end
+    end
+    return table
+end
diff --git a/script/json/encode.lua b/script/json/encode.lua
new file mode 100644
index 00000000..97a1680b
--- /dev/null
+++ b/script/json/encode.lua
@@ -0,0 +1,135 @@
+
+local rep = string.rep
+local format = string.format
+local gsub = string.gsub
+local sub = string.sub
+local sort = table.sort
+local find = string.find
+local tostring = tostring
+local getmetatable = debug.getmetatable
+local type = type
+local next = next
+local ipairs = ipairs
+
+local index
+local lines
+local n = -1
+local tabs = {}
+
+local esc_map = {
+	['\\'] = '\\\\',
+	['\r'] = '\\r',
+	['\n'] = '\\n',
+	['\t'] = '\\t',
+	['"']  = '\\"',
+}
+
+local function encode(data, key)
+	n = n + 1
+	if not tabs[n] then
+		tabs[n] = rep('    ', n)
+	end
+	local tp = type(data)
+	if tp == 'table' then
+		if not data[1] and next(data) then
+			-- 认为这个是哈希表
+			if key then
+				index=index+1;lines[index] = tabs[n] .. '"' .. gsub(key, '[\\\r\n\t"]', esc_map) .. '": {\r\n'
+			else
+				index=index+1;lines[index] = tabs[n] .. '{\r\n'
+			end
+			local meta = getmetatable(data)
+			local sep
+			if meta and meta.__pairs then
+				for k, v in meta.__pairs(data), data do
+					if encode(v, k) then
+						index=index+1;lines[index] = ',\r\n'
+						sep = true
+					end
+				end
+			else
+				local list = {}
+				local i = 0
+				for k in next, data do
+					i=i+1;list[i] = k
+				end
+				sort(list)
+				for j = 1, i do
+					local k = list[j]
+					if encode(data[k], k) then
+						index=index+1;lines[index] = ',\r\n'
+						sep = true
+					end
+				end
+			end
+			if sep then
+				lines[index] = '\r\n'
+			end
+			index=index+1;lines[index] = tabs[n] .. '}'
+		else
+			-- 认为这个是数组
+			if key then
+				index=index+1;lines[index] = tabs[n] .. '"' .. gsub(key, '[\\\r\n\t"]', esc_map) .. '": [\r\n'
+			else
+				index=index+1;lines[index] = tabs[n] .. '[\r\n'
+			end
+			local sep
+			for k, v in pairs(data) do
+				if encode(v) then
+					index=index+1;lines[index] = ',\r\n'
+					sep = true
+				end
+			end
+			if sep then
+				lines[index] = '\r\n'
+			end
+			index=index+1;lines[index] = tabs[n] .. ']'
+		end
+	elseif tp == 'number' then
+		data = tostring(data)
+		-- 判断 inf -inf -nan(ind) 1.#INF -1.#INF -1.#IND
+		if find(data, '%a') then
+			data = '0'
+		end
+		if key then
+			index=index+1;lines[index] = tabs[n] .. '"' .. gsub(key, '[\\\r\n\t"]', esc_map) .. '": ' .. data
+		else
+			index=index+1;lines[index] = tabs[n] .. data
+		end
+	elseif tp == 'boolean' then
+		if key then
+			index=index+1;lines[index] = tabs[n] .. '"' .. gsub(key, '[\\\r\n\t"]', esc_map) .. '": ' .. tostring(data)
+		else
+			index=index+1;lines[index] = tabs[n] .. tostring(data)
+		end
+	elseif tp == 'nil' then
+		if key then
+			index=index+1;lines[index] = tabs[n] .. '"' .. gsub(key, '[\\\r\n\t"]', esc_map) .. '": null'
+		else
+			index=index+1;lines[index] = tabs[n] .. 'null'
+		end
+	elseif tp == 'string' then
+		local str = gsub(data, '[\\\r\n\t"]', esc_map)
+		if key then
+			index=index+1;lines[index] = tabs[n] .. '"' .. gsub(key, '[\\\r\n\t"]', esc_map) .. '": "' .. str .. '"'
+		else
+			index=index+1;lines[index] = tabs[n] .. '"' .. str .. '"'
+		end
+	else
+		n = n - 1
+		return false
+	end
+	n = n - 1
+	return true
+end
+
+local function json(t)
+	lines = {}
+	index = 0
+
+	encode(t)
+
+	return table.concat(lines)
+end
+
+return json
diff --git a/script/json/init.lua b/script/json/init.lua
new file mode 100644
index 00000000..c28e7aed
--- /dev/null
+++ b/script/json/init.lua
@@ -0,0 +1,6 @@
+local api = {
+    decode = require 'json.decode',
+    encode = require 'json.encode',
+}
+
+return api