ncurses 6.1 - patch 20181215

[ncurses.git] / ncurses / trace / lib_trace.c

diff --git a/ncurses/trace/lib_trace.c b/ncurses/trace/lib_trace.c
index 519a5ca90dcda6d4bb69b9719624255a8e577561..f16fa15324e0974cd1ee5dbfb64b717f7989fd1c 100644 (file)
--- a/ncurses/trace/lib_trace.c
+++ b/ncurses/trace/lib_trace.c
@@ -47,7 +47,7 @@
 
 #include <ctype.h>
 
-MODULE_ID("$Id: lib_trace.c,v 1.87 2018/06/24 00:06:37 tom Exp $")
+MODULE_ID("$Id: lib_trace.c,v 1.89 2018/12/16 01:05:30 tom Exp $")
 
 NCURSES_EXPORT_VAR(unsigned) _nc_tracing = 0; /* always define this */
 
@@ -308,6 +308,38 @@ _nc_retrace_win(WINDOW *code)
     return code;
 }
 
+NCURSES_EXPORT(char *)
+_nc_fmt_funcptr(char *target, const char *source, size_t size)
+{
+    size_t n;
+    char *dst = target;
+    bool leading = TRUE;
+
+    union {
+       int value;
+       char bytes[sizeof(int)];
+    } byteorder;
+
+    byteorder.value = 0x1234;
+
+    *dst++ = '0';
+    *dst++ = 'x';
+
+    for (n = 0; n < size; ++n) {
+       unsigned ch = ((byteorder.bytes[0] == 0x34)
+                      ? UChar(source[size - n - 1])
+                      : UChar(source[n]));
+       if (ch != 0 || (n + 1) >= size)
+           leading = FALSE;
+       if (!leading) {
+           sprintf(dst, "%02x", ch & 0xff);
+           dst += 2;
+       }
+    }
+    *dst = '\0';
+    return target;
+}
+
 #if USE_REENTRANT
 /*
  * Check if the given trace-mask is enabled.