bc: in xc_read_line(), check ^C on NUL input bytes too

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

diff --git a/miscutils/bc.c b/miscutils/bc.c
index febf51cfda21df8ab4849a261d99ce777200b635..23b3521d4c51d90e7c33f3546221b3d683c87f48 100644 (file)
--- a/miscutils/bc.c
+++ b/miscutils/bc.c
@@ -2509,7 +2509,7 @@ static void xc_read_line(BcVec *vec, FILE *fp)
                i = 0;
                for (;;) {
                        char c = line_buf[i++];
-                       if (!c) break;
+                       if (c == '\0') break;
                        if (bad_input_byte(c)) goto again;
                }
                bc_vec_string(vec, n, line_buf);
@@ -2522,14 +2522,16 @@ static void xc_read_line(BcVec *vec, FILE *fp)
                bool bad_chars = 0;
 
                do {
+ get_char:
 #if ENABLE_FEATURE_BC_INTERACTIVE
                        if (G_interrupt) {
                                // ^C was pressed: ignore entire line, get another one
-                               bc_vec_pop_all(vec);
-                               goto intr;
+                               goto again;
                        }
 #endif
-                       do c = fgetc(fp); while (c == '\0');
+                       c = fgetc(fp);
+                       if (c == '\0')
+                               goto get_char;
                        if (c == EOF) {
                                if (ferror(fp))
                                        bb_perror_msg_and_die("input error");