dopus/Library/strings.c

   1 /*
   2
   3 Directory Opus 4
   4 Original GPL release version 4.12
   5 Copyright 1993-2000 Jonathan Potter
   6
   7 This program is free software; you can redistribute it and/or
   8 modify it under the terms of the GNU General Public License
   9 as published by the Free Software Foundation; either version 2
  10 of the License, or (at your option) any later version.
  11
  12 This program is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with this program; if not, write to the Free Software
  19 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  20
  21 All users of Directory Opus 4 (including versions distributed
  22 under the GPL) are entitled to upgrade to the latest version of
  23 Directory Opus version 5 at a reduced price. Please see
  24 http://www.gpsoft.com.au for more information.
  25
  26 The release of Directory Opus 4 under the GPL in NO WAY affects
  27 the existing commercial status of Directory Opus 5.
  28
  29 */
  30
  31 #include "dopuslib.h"
  32
  33 __saveds int DoStrCombine(register char *buf __asm("a0"),
  34     register char *one __asm("a1"),
  35     register char *two __asm("a2"),
  36     register int lim __asm("d0"))
  37 {
  38     register int a;
  39
  40     a=strlen(one); if (a>=lim) a=lim-1;
  41     LStrnCpy(buf,one,a); buf[a]=0;
  42     return(DoStrConcat(buf,two,lim));
  43 }
  44
  45 __saveds int DoStrConcat(register char *buf __asm("a0"),
  46     register char *cat __asm("a1"),
  47     register int lim __asm("d0"))
  48 {
  49     register int a,b;
  50
  51     a=strlen(cat); b=strlen(buf);
  52     --lim;
  53     if (a+b<lim) {
  54         LStrnCpy(&buf[b],cat,a); buf[b+a]=0;
  55         return(1);
  56     }
  57     if (lim>b) LStrnCpy(&buf[b],cat,lim-b);
  58     buf[lim]=0;
  59     return(0);
  60 }
  61
  62 __saveds int DoAtoh(register unsigned char *buf __asm("a0"),
  63     register int len __asm("d0"))
  64 {
  65     int a,c,d,e,f;
  66
  67     c=e=0;
  68     for (a=0;;a++) {
  69         if (!buf[a] || !((buf[a]>='0' && buf[a]<='9') || (buf[a]>='a' && buf[a]<='f') ||
  70             (buf[a]>='A' && buf[a]<='F'))) break;
  71         if ((++e)==len) break;
  72     }
  73     if (e==0) return(0);
  74     f=1;
  75     for (a=1;a<e;a++) f*=16;
  76     for (a=0;a<e;a++) {
  77         if (buf[a]>='0' && buf[a]<='9') d=buf[a]-'0';
  78         else if (buf[a]>='A' && buf[a]<='F') d=10+(buf[a]-'A');
  79         else if (buf[a]>='a' && buf[a]<='f') d=10+(buf[a]-'a');
  80         c+=(d*f);
  81         f/=16;
  82     }
  83     return(c);
  84 }