conversionunit.pas

来自「自动打印dos产生的文本文件 自动打印dos产生的文本文件」· PAS 代码 · 共 36 行

{      Many will recall a series of messages that I posted a few weeks
      ago regarding the Implementation of XLAT in BAsm.

      I have revisited it With the idea of using it not For filtering
      but just For up- and low-casing Pascal Strings. I came With a
      pure Assembler Function With a loop of only 4 instructions (TXlat
      in Unit TXLATU.PAS). The acCompanying Program TXLATE1.PAS shows
      examples on how to use TXlat both For up- or low-casing a String.

      The intriguing finding was that when I bench-marked it against
      other Assembler Upcasing routines posted in this echo or against
      the one in Hax 144 in PC-Techniques (Vol.3, No.6, Feb 1993, p.40)
      TXlat got to be 20-30% faster! if anyone is interested I could
      upload the benchmarking routines.

      So, here is my question: could this possibly be the fastest
      routine For String conversion in Turbo Pascal?

      Please note that XLAT has special requirements respect to the
      location of the source and destination buffers as well as the
      translation table. Turbo Pascal memory model places global
      Variables in the data segment wh    local Variables are located in
      the stack segment. The code in TXlat requires that both the table
      and the source buffer be located in the data segment.

      Another point of interest is that a Pascal String Variabe (Table) is
      used as the 256-Byte long table required by XLAT.

      -Jose- (1:163/513.3)

   ============================================================================}

    Unit ConversionUnit;

   {谀哪哪哪哪哪哪哪哪哪哪哪哪哪哪哪哪哪哪哪哪哪?}
   {3Unit TXlatU.PAS by Jos