libbb: introduce and use strcpy_and_process_escape_sequences

function                                             old     new   delta
strcpy_and_process_escape_sequences                    -      50     +50
bb_process_escape_sequence                           148     138     -10
printf_main                                          789     776     -13
getty_main                                          1897    1831     -66
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 0/3 up/down: 50/-89)            Total: -39 bytes

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

1 files changed, 8 insertions, 10 deletions

diff --git a/coreutils/printf.c b/coreutils/printf.c
index 2cc238439..c8395fa89 100644
--- a/coreutils/printf.c
+++ b/coreutils/printf.c
@@ -122,16 +122,14 @@ static double my_xstrtod(const char *arg)
 	return result;
 }
 
-static void print_esc_string(char *str)
+static void print_esc_string(const char *str)
 {
-	while (*str) {
-		if (*str == '\\') {
-			str++;
-			bb_putchar(bb_process_escape_sequence((const char **)&str));
-		} else {
-			bb_putchar(*str);
-			str++;
-		}
+	char c;
+	while ((c = *str) != '\0') {
+		str++;
+		if (c == '\\')
+			c = bb_process_escape_sequence(&str);
+		putchar(c);
 	}
 }
 
@@ -344,7 +342,7 @@ static char **print_formatted(char *f, char **argv, int *conv_err)
 			f--;
 			break;
 		default:
-			bb_putchar(*f);
+			putchar(*f);
 		}
 	}