* Partial Unicode support for the DOS/conio.h driver. Glyphs that have

equivalents in CP437 0x7f - 0xff are translated.

caca/driver_conio.c

@@ -34,6 +34,8 @@
 #include "cucul.h"
 #include "cucul_internals.h"
 
+static uint8_t conio_utf32_to_cp437(uint32_t);
+
 struct driver_private
 {
     struct text_info ti;
@@ -104,13 +106,7 @@ static void conio_display(caca_t *kk)
 
     for(n = kk->qq->height * kk->qq->width; n--; )
     {
-        uint32_t c = *chars++;
-
-        if(c > 0x00000020 && c < 0x00000080)
-            *screen++ = (char)c;
-        else
-            *screen++ = ' ';
-
+        *screen++ = conio_utf32_to_cp437(*chars++);
         *screen++ = *attr++;
     }
 #   if defined(SCREENUPDATE_IN_PC_H)
@@ -139,6 +135,59 @@ static unsigned int conio_get_event(caca_t *kk)
     return CACA_EVENT_KEY_PRESS | event;
 }
 
+/*
+ * XXX: following functions are local
+ */
+
+static uint8_t conio_utf32_to_cp437(uint32_t c)
+{
+    static uint32_t const lookup[] =
+    {
+        /* 0x7f */
+        0x2302,
+        /* 0x80 - 0x8f */
+        0xc7, 0xfc, 0xe9, 0xe2, 0xe4, 0xe0, 0xe5, 0xe7,
+        0xea, 0xeb, 0xe8, 0xef, 0xee, 0xec, 0xc4, 0xc5,
+        /* 0x90 - 0x9f */
+        0xc9, 0xe6, 0xc6, 0xf4, 0xf6, 0xf2, 0xfb, 0xf9,
+        0xff, 0xd6, 0xdc, 0xa2, 0xa3, 0xa5, 0x20a7, 0x192,
+        /* 0xa0 - 0xaf */
+        0xe1, 0xed, 0xf3, 0xfa, 0xf1, 0xd1, 0xaa, 0xba,
+        0xbf, 0x2310, 0xac, 0xbd, 0xbc, 0xa1, 0xab, 0xbb,
+        /* 0xb0 - 0xbf */
+        0x2591, 0x2592, 0x2593, 0x2502, 0x2524, 0x2561, 0x2562, 0x2556,
+        0x2555, 0x2563, 0x2551, 0x2557, 0x255d, 0x255c, 0x255b, 0x2510,
+        /* 0xc0 - 0xcf */
+        0x2514, 0x2534, 0x252c, 0x251c, 0x2500, 0x253c, 0x255e, 0x255f,
+        0x255a, 0x2554, 0x2569, 0x2566, 0x2560, 0x2550, 0x256c, 0x2567,
+        /* 0xd0 - 0xdf */
+        0x2568, 0x2564, 0x2565, 0x2559, 0x2558, 0x2552, 0x2553, 0x256b,
+        0x256a, 0x2518, 0x250c, 0x2588, 0x2584, 0x258c, 0x2590, 0x2580,
+        /* 0xe0 - 0xef */
+        0x3b1, 0xdf, 0x393, 0x3c0, 0x3a3, 0x3c3, 0xb5, 0x3c4,
+        0x3a6, 0x398, 0x3a9, 0x3b4, 0x221e, 0x3c6, 0x3b5, 0x2229,
+        /* 0xf0 - 0xff */
+        0x2261, 0xb1, 0x2265, 0x2264, 0x2320, 0x2321, 0xf7, 0x2248,
+        0xb0, 0x2219, 0xb7, 0x221a, 0x207f, 0xb2, 0x25a0, 0xa0
+    };
+
+    unsigned int i;
+ 
+    if(c < 0x00000020)
+        return '?';
+
+    if(c < 0x00000080)
+        return c;
+
+    for(i = 0; i < sizeof(lookup) / sizeof(*lookup); i++)
+    {
+        if(lookup[i] == c)
+            return 0x7f + i;
+    }
+
+    return '?';
+}
+
 /*
  * Driver initialisation
  */