rom/filesys/CDVDFS/src/charset.c

   1 #include <dos/dosextens.h>
   2 #include <dos/dostags.h>
   3 #include <proto/codesets.h>
   4 #include <proto/dos.h>
   5 #include <proto/exec.h>
   6 #include <ctype.h>
   7 #include <stdlib.h>
   8 #include <string.h>
   9
  10 #include "debug.h"
  11 #include "globals.h"
  12 #include "charset.h"
  13 #include "aros_stuff.h"
  14
  15 void InitCharset(struct CDVDBase *global)
  16 {
  17     if (!CodesetsBase)
  18     {
  19         CodesetsBase = OpenLibrary("codesets.library", 0);
  20         BUG(dbprintf(global, "[CDVDFS] CodesetsBase 0x%p\n", CodesetsBase));
  21
  22         if (CodesetsBase)
  23         {
  24             global->uniCodeset = CodesetsFindA("UTF-16", NULL);
  25             BUG(dbprintf(global, "[CDVDFS] Unicode codeset: 0x%p\n", global->uniCodeset));
  26         }
  27     }
  28 }
  29
  30 int UTF16ToSystem(struct CDVDBase *global, char *from, char *to, unsigned char len)
  31 {
  32     ULONG l = -1;
  33
  34     if (global->uniCodeset)
  35     {
  36         char *str;
  37         struct TagItem tags[5];
  38
  39         /*
  40          * I have to fill in tags in this weird way because otherwise
  41          * MorphOS gcc v2.95.3 generates memcpy() call here, and we have
  42          * no global SysBase variable.
  43          * And i can't use -lcodesets because it also requires global
  44          * CodesetsBase.
  45          * Please don't change this.
  46          */
  47         tags[0].ti_Tag  = CSA_SourceCodeset;
  48         tags[0].ti_Data = (IPTR)global->uniCodeset;
  49         tags[1].ti_Tag  = CSA_Source;
  50         tags[1].ti_Data = (IPTR)from;
  51         tags[2].ti_Tag  = CSA_SourceLen;
  52         tags[2].ti_Data = len;
  53         tags[3].ti_Tag  = CSA_DestLenPtr;
  54         tags[3].ti_Data = (IPTR)&l;
  55         tags[4].ti_Tag  = TAG_DONE;
  56
  57         /*
  58          * Unfortunately codesets.library does not allow
  59          * to specify CSA_Dest and CSA_DestLen to
  60          * CodesetsConvertA(), so we have to do this copy-deallocate
  61          * operation.
  62          */
  63         str = CodesetsConvertStrA(tags);
  64         if (str)
  65         {
  66             CopyMem(str, to, l);
  67             CodesetsFreeA(str, NULL);
  68         }
  69     }
  70
  71     return l;
  72 }
  73