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--
--常用公共函数库
--
local FUNC = {}

--to int
FUNC.int = function(sString)
    local iNum = tonumber(sString)
    iNum = ((iNum == nil) and tonumber(0)) or iNum
    return iNum
end


--将字符串分割成数组，同php： explode
FUNC.explode = function(szFullString, szSeparator)  
    local nFindStartIndex = 1  
    local nSplitIndex = 1  
    local nSplitArray = {}  
    while true do  
        local nFindLastIndex = string.find(szFullString, szSeparator, nFindStartIndex)  
        if not nFindLastIndex then  
            nSplitArray[nSplitIndex] = string.sub(szFullString, nFindStartIndex, string.len(szFullString))  
            break  
        end  
        nSplitArray[nSplitIndex] = string.sub(szFullString, nFindStartIndex, nFindLastIndex - 1)  
        nFindStartIndex = nFindLastIndex + string.len(szSeparator)  
        nSplitIndex = nSplitIndex + 1  
    end  
    return nSplitArray  
end  

--将日期转换为时间戳，date(Y-m-d H:i:s) 同php strtotime，只支持 1970-01-01 08:00:00 格式
--返回时间戳
FUNC.strtotime = function(sDate)
    local iTime = 0
    
    if 0 == string.len(sDate) then 
        return iTime
    end
    local sDateymd = string.sub(sDate, 1, 10)
    local sDatehis = string.sub(sDate, 12, -1)
    local aDateymd = FUNC.explode(sDateymd, '-')
    local aDatehis = FUNC.explode(sDatehis, ':')
    local Y,m,d = aDateymd[1], aDateymd[2], aDateymd[3]
    local H,i,s = aDatehis[1], aDatehis[2], aDatehis[3]
    iTime = os.time({year=Y, month=m, day=d, hour=H, min=i,sec=s})
    return iTime
end

return FUNC