source/lib/charcnv.c

   1 /*
   2    Unix SMB/Netbios implementation.
   3    Version 1.9.
   4    Character set conversion Extensions
   5    Copyright (C) Andrew Tridgell 1992-1994
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 2 of the License, or
  10    (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., 675 Mass Ave, Cambridge, MA 02139, USA.
  20
  21 */
  22 #include "includes.h"
  23 extern int DEBUGLEVEL;
  24
  25 static char cvtbuf[1024];
  26
  27 static mapsinited = 0;
  28
  29 static char unix2dos[256];
  30 static char dos2unix[256];
  31
  32 static void initmaps() {
  33     int k;
  34
  35     for (k = 0; k < 256; k++) unix2dos[k] = k;
  36     for (k = 0; k < 256; k++) dos2unix[k] = k;
  37
  38     mapsinited = 1;
  39 }
  40
  41 static void update_map(char * str) {
  42     char *p;
  43
  44     for (p = str; *p; p++) {
  45         if (p[1]) {
  46             unix2dos[(unsigned char)*p] = p[1];
  47             dos2unix[(unsigned char)p[1]] = *p;
  48             p++;
  49         }
  50     }
  51 }
  52
  53 static void initiso() {
  54
  55     if (!mapsinited) initmaps();
  56
  57     update_map("\241\255\242\233\243\234\244\236\245\235\246\272\247\025\250\251");
  58     update_map("\251\273\252\246\253\256\254\252\255\274\256\310\257\257\260\370");
  59     update_map("\261\361\262\375\263\264\264\265\265\266\266\024\267\371\270\267");
  60     update_map("\271\270\272\247\273\275\274\254\275\253\276\276\277\250\200\277");
  61     update_map("\301\300\302\301\303\302\304\216\305\217\306\222\307\200\310\303");
  62     update_map("\311\220\312\305\313\306\314\307\315\315\316\317\317\320\320\311");
  63     update_map("\321\245\322\321\323\322\324\323\325\324\326\231\327\312\330\325");
  64     update_map("\331\326\332\327\333\330\334\232\335\313\336\314\337\341\340\205");
  65     update_map("\341\240\342\203\343\331\344\204\345\206\346\221\347\207\350\212");
  66     update_map("\351\202\352\210\353\211\354\215\355\241\356\214\357\213\360\316");
  67     update_map("\361\244\362\225\363\242\364\223\365\332\366\224\367\366\370\362");
  68     update_map("\371\227\372\243\373\226\374\201\375\304\376\263\377\230");
  69 }
  70
  71 /*
  72  * Convert unix to dos
  73  */
  74 char *unix2dos_format(char *str,BOOL overwrite)
  75 {
  76     char *p;
  77     char *dp;
  78
  79     if (!mapsinited) initmaps();
  80     if (overwrite) {
  81         for (p = str; *p; p++) *p = unix2dos[(unsigned char)*p];
  82         return str;
  83     } else {
  84         for (p = str, dp = cvtbuf; *p; p++,dp++) *dp = unix2dos[(unsigned char)*p];
  85         *dp = 0;
  86         return cvtbuf;
  87     }
  88 }
  89
  90 /*
  91  * Convert dos to unix
  92  */
  93 char *dos2unix_format(char *str, BOOL overwrite)
  94 {
  95     char *p;
  96     char *dp;
  97
  98     if (!mapsinited) initmaps();
  99     if (overwrite) {
 100         for (p = str; *p; p++) *p = dos2unix[(unsigned char)*p];
 101         return str;
 102     } else {
 103         for (p = str, dp = cvtbuf; *p; p++,dp++) *dp = dos2unix[(unsigned char)*p];
 104         *dp = 0;
 105         return cvtbuf;
 106     }
 107 }
 108
 109
 110 /*
 111  * Interpret character set.
 112  */
 113 int interpret_character_set(char *str, int def)
 114 {
 115
 116     if (strequal (str, "iso8859-1")) {
 117         initiso();
 118         return def;
 119     } else {
 120         DEBUG(0,("unrecognized character set\n"));
 121     }
 122     return def;
 123 }