X-Git-Url: https://pd.if.org/git/?a=blobdiff_plain;f=internals%2F_PDCLIB_locale.h;h=3e0f424b06e7f65cebad083ac6db1c059a09f321;hb=e6e196c9d74a3a1d88b244fb0e5a759c47d3da84;hp=09fa3c0128f877e4e85108fc02dcec839fcf2450;hpb=3682010e5b8bcd48fd82f3e604829f045c7ada29;p=pdclib

diff --git a/internals/_PDCLIB_locale.h b/internals/_PDCLIB_locale.h
index 09fa3c0..3e0f424 100644
--- a/internals/_PDCLIB_locale.h
+++ b/internals/_PDCLIB_locale.h
@@ -75,6 +75,49 @@ typedef struct _PDCLIB_wcinfo
     _PDCLIB_uint32_t upper;
 } _PDCLIB_wcinfo_t;
 
+extern _PDCLIB_wcinfo_t _PDCLIB_wcinfo[];
+extern size_t           _PDCLIB_wcinfo_size;
+
+static inline int _PDCLIB_wcinfo_cmp( const void * _key, const void * _obj )
+{
+    _PDCLIB_uint32_t * key = (_PDCLIB_uint32_t *) _key;
+    _PDCLIB_wcinfo_t * obj = (_PDCLIB_wcinfo_t *) _obj;
+    return *key - obj->num;
+}
+
+static inline _PDCLIB_wcinfo_t * _PDCLIB_wcgetinfo( _PDCLIB_uint32_t num )
+{
+    _PDCLIB_wcinfo_t *info = (_PDCLIB_wcinfo_t*) 
+        bsearch( &num, _PDCLIB_wcinfo, _PDCLIB_wcinfo_size, 
+                 sizeof( _PDCLIB_wcinfo[0] ), _PDCLIB_wcinfo_cmp );
+
+    return info;
+}
+
+static inline _PDCLIB_wint_t _PDCLIB_unpackwint( _PDCLIB_wint_t wc )
+{
+    if( sizeof(_PDCLIB_wchar_t) == 2 && sizeof(_PDCLIB_wint_t) == 4 ) {
+        /* On UTF-16 platforms, as an extension accept a "packed surrogate"
+         * encoding. We accept the surrogate pairs either way
+         */
+
+        _PDCLIB_wint_t c = (wc & 0xF800F800);
+        if(c == (_PDCLIB_wint_t) 0xD800DC00) {
+            // MSW: Lead, LSW: Trail
+            _PDCLIB_wint_t lead  = wc >> 16 & 0x3FF;
+            _PDCLIB_wint_t trail = wc       & 0x3FF;
+            wc = lead << 10 | trail;
+        } else if(c == (_PDCLIB_wint_t) 0xDC00D800) {
+            // MSW: Trail, LSW: Lead
+            _PDCLIB_wint_t trail = wc >> 16 & 0x3FF;
+            _PDCLIB_wint_t lead  = wc       & 0x3FF;
+            wc = lead << 10 | trail;
+        }
+
+    }
+    return wc;
+}
+
 struct _PDCLIB_locale {
     _PDCLIB_charcodec_t          _Codec;
     struct lconv                 _Conv;