// Scilab ( http://www.scilab.org/ ) - This file is part of Scilab
// Copyright (C) 2002-2004 - INRIA - Vincent COUVERT
//
// This file must be used under the terms of the CeCILL.
// This source file is licensed as described in the file COPYING, which
// you should have received as part of this distribution.  The terms
// are also available at
// http://www.cecill.info/licences/Licence_CeCILL_V2.1-en.txt

function [a, count]=mtlb_fread(fid,sz,prec)
    // Emulation function for fread() Matlab function

    prectbl=["c"  "char"    "char"
    "?"  "schar"   "signed char"
    "s"  "short"   "short"
    "i"  "int"     "int"
    "l"  "long"    "long"
    "f"  "float"   "float"
    "d"  "double"  "double"
    "uc" "uchar"   "unsigned char"
    "us" "ushort"  "unsigned short"
    "ui" "uint"    "unsigned int"
    "ul" "ulong"   "unsigned long"
    "c"  "char"    "char*1"
    "f"  "float32" "real*4"
    "d"  "float64" "real*8"
    "c"  "int8"    "integer*1"
    "s"  "int16"   "integer*2"
    "i"  "int32"   "integer*4"
    "l"  ""        "integer*8"
    "?"  "intN"    ""
    "?"  "uintN"   ""         ]

    [lhs,rhs]=argn(0)
    select rhs
    case 1 then
        sz=%inf
        prec="uchar"
    case 2 then
        prec="uchar"
    end
    [l,k]=find(prec==prectbl)
    if l==[] then
        error(msprintf(gettext("%s: The format ''%s'' is unknown.\n"), "mtlb_fread", prec))
    end
    Prec=prectbl(l(1),1)
    if Prec=="?" then
        error(msprintf(gettext("%s: The format ''%s'' is not yet handled.\n"), "mtlb_fread", prec))
    end
    if isinf(sz) then
        a=[]
        while %t
            x=mget(1,Prec,fid)
            if meof(fid)<>0 then
                mclearerr(fid)
                break
            end
            a=[a;x]
        end
        count=size(a,1)
    else
        a=mget(prod(sz),Prec,fid)

        if meof(fid)<>0 then
            mclearerr(fid)
            error(msprintf(gettext("%s: End of file reached before all matrix is read.\n"), "mtlb_fread"))
        end
        if size(sz,"*")==1 then
            a=a(:)
        else
            a=matrix(a,sz(1),sz(2))
        end
        count=size(a,"*")
    end

endfunction