small optimizations of toupper/tolower

function                                             old     new   delta
in_ib                                                191     172     -19

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

1 files changed, 5 insertions, 8 deletions

diff --git a/editors/awk.c b/editors/awk.c
index 17244f9e6..bc1d93868 100644
--- a/editors/awk.c
+++ b/editors/awk.c
@@ -2031,7 +2031,6 @@ static NOINLINE var *exec_builtin(node *op, var *res)
 {
 #define tspl (G.exec_builtin__tspl)
 
-        int (*to_xxx)(int);
         var *tv;
         node *an[4];
         var *av[4];
@@ -2061,7 +2060,8 @@ static NOINLINE var *exec_builtin(node *op, var *res)
         if ((uint32_t)nargs < (info >> 30))
                 syntax_error(EMSG_TOO_FEW_ARGS);
 
-        switch (info & OPNMASK) {
+        info &= OPNMASK;
+        switch (info) {
 
         case B_a2:
 #if ENABLE_FEATURE_AWK_LIBM
@@ -2126,15 +2126,12 @@ static NOINLINE var *exec_builtin(node *op, var *res)
                 break;
 
         case B_lo:
-                to_xxx = tolower;
-                goto lo_cont;
-
         case B_up:
-                to_xxx = toupper;
- lo_cont:
                 s1 = s = xstrdup(as[0]);
                 while (*s1) {
-                        *s1 = (*to_xxx)(*s1);
+                        //*s1 = (info == B_up) ? toupper(*s1) : tolower(*s1);
+                        if ((unsigned char)((*s1 | 0x20) - 'a') <= ('z' - 'a'))
+                                *s1 = (info == B_up) ? (*s1 & 0xdf) : (*s1 | 0x20);
                         s1++;
                 }
                 setvar_p(res, s);