bc: speed up string printing, fix print ""

function                                             old     new   delta
static.esc                                             -       9      +9
zxc_program_print                                    681     683      +2
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(add/remove: 1/0 grow/shrink: 1/0 up/down: 11/0)               Total: 11 bytes
   text	   data	    bss	    dec	    hex	filename
 979144	    485	   7296	 986925	  f0f2d	busybox_old
 979062	    485	   7296	 986843	  f0edb	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/testsuite/bc.tests b/testsuite/bc.tests
index 13525ea52..fbcfff2e4 100755
--- a/testsuite/bc.tests
+++ b/testsuite/bc.tests
@@ -149,6 +149,12 @@ testing "bc (!a&&b)" \
         "0\n" \
         "" "(!a&&b)"
 
+# check that dc code is not messing this up (no NUL printing!)
+testing "bc print \"\"" \
+        "bc" \
+        "" \
+        "" "print \"\""
+
 testing "bc print 1,2,3" \
         "bc" \
         "123" \