bc: optimize zbc_lex_string()

function                                             old     new   delta
zbc_lex_next                                        2359    2353      -6

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

1 files changed, 12 insertions, 7 deletions

diff --git a/miscutils/bc.c b/miscutils/bc.c
index 5d969c9d0..be198a5fb 100644
--- a/miscutils/bc.c
+++ b/miscutils/bc.c
@@ -2986,17 +2986,22 @@ static BC_STATUS zbc_lex_identifier(BcLex *l)
 
 static BC_STATUS zbc_lex_string(BcLex *l)
 {
-        size_t len, nls = 0, i = l->i;
-        char c;
+        size_t len, nls, i;
 
         l->t.t = BC_LEX_STR;
 
-        for (c = l->buf[i]; c != '\0' && c != '"'; c = l->buf[++i])
+        nls = 0;
+        i = l->i;
+        for (;;) {
+                char c = l->buf[i];
+                if (c == '\0') {
+                        l->i = i;
+                        RETURN_STATUS(bc_error("string end could not be found"));
+                }
+                if (c == '"')
+                        break;
                 nls += (c == '\n');
-
-        if (c == '\0') {
-                l->i = i;
-                RETURN_STATUS(bc_error("string end could not be found"));
+                i++;
         }
 
         len = i - l->i;