feat(printf): add # flag support for %b specifier

Closes #29

2 files changed, 7 insertions, 1 deletions

diff --git a/printf.c b/printf.c
index e4cb328..d932dba 100644
--- a/printf.c
+++ b/printf.c
@@ -175,6 +175,9 @@ static size_t _ntoa_format(out_fct_type out, char* buffer, size_t idx, size_t ma
     if ((base == 16U) &&  (flags & FLAGS_UPPERCASE) && (len < PRINTF_NTOA_BUFFER_SIZE)) {

       buf[len++] = 'X';

     }

+    if ((base == 2U) && (len < PRINTF_NTOA_BUFFER_SIZE)) {

+      buf[len++] = 'b';

+    }

     if (len < PRINTF_NTOA_BUFFER_SIZE) {

       buf[len++] = '0';

     }

@@ -535,7 +538,6 @@ static int _vsnprintf(out_fct_type out, char* buffer, const size_t maxlen, const
         }

         else if (*format == 'b') {

           base =  2U;

-          flags &= ~FLAGS_HASH;   // no hash for bin format

         }

         else {

           base = 10U;

diff --git a/test/test_suite.cpp b/test/test_suite.cpp
index 45f1abe..272f4c4 100644
--- a/test/test_suite.cpp
+++ b/test/test_suite.cpp
@@ -352,6 +352,10 @@ TEST_CASE("# flag", "[]" ) {
 

   test::sprintf(buffer, "%#.0x", 0);

   REQUIRE(!strcmp(buffer, ""));

+  test::sprintf(buffer, "%#.8x", 0x614e);

+  REQUIRE(!strcmp(buffer, "0x0000614e"));

+  test::sprintf(buffer,"%#b", 6);

+  REQUIRE(!strcmp(buffer, "0b110"));

 }