mdw@git.distorted.org.uk Git - sgt/charset/blob - xenc.c

   1 /*
   2  * xenc.c - translate our internal character set codes to and from
   3  * X11 character encoding names.
   4  *
   5  */
   6
   7 #include <ctype.h>
   8 #include "charset.h"
   9 #include "internal.h"
  10
  11 static const struct {
  12     const char *name;
  13     int charset;
  14 } xencs[] = {
  15     /*
  16      * Officially registered encoding names. This list is derived
  17      * from the font encodings section of
  18      *
  19      *   http://ftp.x.org/pub/DOCS/registry
  20      *
  21      * Where multiple encoding names map to the same encoding id
  22      * (such as iso8859-15 and fcd8859-15), the first is considered
  23      * canonical and will be returned when translating the id to a
  24      * string.
  25      */
  26     { "iso8859-1", CS_ISO8859_1 },
  27     { "iso8859-2", CS_ISO8859_2 },
  28     { "iso8859-3", CS_ISO8859_3 },
  29     { "iso8859-4", CS_ISO8859_4 },
  30     { "iso8859-5", CS_ISO8859_5 },
  31     { "iso8859-6", CS_ISO8859_6 },
  32     { "iso8859-7", CS_ISO8859_7 },
  33     { "iso8859-8", CS_ISO8859_8 },
  34     { "iso8859-9", CS_ISO8859_9 },
  35     { "iso8859-10", CS_ISO8859_10 },
  36     { "iso8859-13", CS_ISO8859_13 },
  37     { "iso8859-14", CS_ISO8859_14 },
  38     { "iso8859-15", CS_ISO8859_15 },
  39     { "fcd8859-15", CS_ISO8859_15 },
  40     { "hp-roman8", CS_HP_ROMAN8 },
  41     { "koi8-r", CS_KOI8_R },
  42     /*
  43      * Unofficial encoding names found in the wild.
  44      */
  45     { "iso8859-16", CS_ISO8859_16 },
  46     { "koi8-u", CS_KOI8_U },
  47     { "ibm-cp437", CS_CP437 },
  48     { "ibm-cp850", CS_CP850 },
  49     { "microsoft-cp1250", CS_CP1250 },
  50     { "microsoft-cp1251", CS_CP1251 },
  51     { "microsoft-cp1252", CS_CP1252 },
  52     { "microsoft-cp1253", CS_CP1253 },
  53     { "microsoft-cp1254", CS_CP1254 },
  54     { "microsoft-cp1255", CS_CP1255 },
  55     { "microsoft-cp1256", CS_CP1256 },
  56     { "microsoft-cp1257", CS_CP1257 },
  57     { "microsoft-cp1258", CS_CP1258 },
  58     { "mac-roman", CS_MAC_ROMAN },
  59     { "viscii1.1-1", CS_VISCII },
  60     { "viscii1-1", CS_VISCII },
  61 };
  62
  63 const char *charset_to_xenc(int charset)
  64 {
  65     int i;
  66
  67     for (i = 0; i < (int)lenof(xencs); i++)
  68         if (charset == xencs[i].charset)
  69             return xencs[i].name;
  70
  71     return NULL;                       /* not found */
  72 }
  73
  74 int charset_from_xenc(const char *name)
  75 {
  76     int i;
  77
  78     for (i = 0; i < (int)lenof(xencs); i++) {
  79         const char *p, *q;
  80         p = name;
  81         q = xencs[i].name;
  82         while (*p || *q) {
  83             if (tolower(*p) != tolower(*q))
  84                 break;
  85             p++; q++;
  86         }
  87         if (!*p && !*q)
  88             return xencs[i].charset;
  89     }
  90
  91     return CS_NONE;                    /* not found */
  92 }