*: optimize most of isXXXXX() macros

   text    data     bss     dec     hex filename
 824164     453    6812  831429   cafc5 busybox_old
 823730     453    6812  830995   cae13 busybox_unstripped

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

7 files changed, 33 insertions, 23 deletions

diff --git a/archival/gzip.c b/archival/gzip.c
index 1e56c9dec..71505698c 100644
--- a/archival/gzip.c
+++ b/archival/gzip.c
@@ -1173,7 +1173,7 @@ static void gen_codes(ct_data * tree, int max_code)
 
                 Tracec(tree != G2.static_ltree,
                            (stderr, "\nn %3d %c l %2d c %4x (%x) ", n,
-                                (isgraph(n) ? n : ' '), len, tree[n].Code,
+                                (n > ' ' ? n : ' '), len, tree[n].Code,
                                 next_code[len] - 1));
         }
 }
@@ -1541,7 +1541,7 @@ static void compress_block(ct_data * ltree, ct_data * dtree)
                 lc = G1.l_buf[lx++];
                 if ((flag & 1) == 0) {
                         SEND_CODE(lc, ltree);   /* send a literal byte */
-                        Tracecv(isgraph(lc), (stderr, " '%c' ", lc));
+                        Tracecv(lc > ' ', (stderr, " '%c' ", lc));
                 } else {
                         /* Here, lc is the match length - MIN_MATCH */
                         code = G2.length_code[lc];
diff --git a/coreutils/od.c b/coreutils/od.c
index e4179a36d..228db19ac 100644
--- a/coreutils/od.c
+++ b/coreutils/od.c
@@ -20,9 +20,6 @@
 
 #include "dump.h"
 
-#define isdecdigit(c) isdigit(c)
-#define ishexdigit(c) (isxdigit)(c)
-
 static void
 odoffset(dumper_t *dumper, int argc, char ***argvp)
 {
@@ -51,8 +48,8 @@ odoffset(dumper_t *dumper, int argc, char ***argvp)
 
         if ((*p != '+')
                 && (argc < 2
-                        || (!isdecdigit(p[0])
-                                && ((p[0] != 'x') || !ishexdigit(p[1])))))
+                        || (!isdigit(p[0])
+                                && ((p[0] != 'x') || !isxdigit(p[1])))))
                 return;
 
         base = 0;
@@ -62,7 +59,7 @@ odoffset(dumper_t *dumper, int argc, char ***argvp)
          */
         if (p[0] == '+')
                 ++p;
-        if (p[0] == 'x' && ishexdigit(p[1])) {
+        if (p[0] == 'x' && isxdigit(p[1])) {
                 ++p;
                 base = 16;
         } else if (p[0] == '0' && p[1] == 'x') {
@@ -72,10 +69,10 @@ odoffset(dumper_t *dumper, int argc, char ***argvp)
 
         /* skip over the number */
         if (base == 16)
-                for (num = p; ishexdigit(*p); ++p)
+                for (num = p; isxdigit(*p); ++p)
                         continue;
         else
-                for (num = p; isdecdigit(*p); ++p)
+                for (num = p; isdigit(*p); ++p)
                         continue;
 
         /* check for no number */
diff --git a/include/libbb.h b/include/libbb.h
index ad0d59d04..805846391 100644
--- a/include/libbb.h
+++ b/include/libbb.h
@@ -1566,8 +1566,11 @@ extern const char bb_default_login_shell[];
 #define RB_POWER_OFF   0x4321fedc
 #endif
 
-/* Make sure we call functions instead of macros.  */
+/* Make sure we call functions instead of these macros */
 #undef isalnum
+#undef ispunct
+#undef isxdigit
+/* and these we'll redefine */
 #undef isalpha
 #undef isascii
 #undef isblank
@@ -1575,25 +1578,32 @@ extern const char bb_default_login_shell[];
 #undef isgraph
 #undef islower
 #undef isprint
-#undef ispunct
 #undef isupper
-#undef isxdigit
+#undef isdigit
+#undef isspace
 
 /* This one is more efficient - we save ~500 bytes.
  * BTW, x86 likes (unsigned char) cast more than (unsigned). */
-#undef isdigit
 #define isdigit(a) ((unsigned char)((a) - '0') <= 9)
 
-/* This one is more efficient too! ~200 bytes */
+#define isascii(a) ((unsigned char)(a) <= 0x7f)
+#define isgraph(a) ((unsigned char)(a) > ' ')
+#define isprint(a) ((unsigned char)(a) >= ' ')
+#define isupper(a) ((unsigned char)((a) - 'A') <= ('Z' - 'A'))
+#define islower(a) ((unsigned char)((a) - 'a') <= ('z' - 'a'))
+#define isalpha(a) ((unsigned char)(((a) | 0x20) - 'a') <= ('z' - 'a'))
+#define isblank(a) ({ unsigned char bb__isblank = (a); bb__isblank == ' ' || bb__isblank == '\t'; })
+#define iscntrl(a) ({ unsigned char bb__iscntrl = (a); bb__iscntrl < ' ' || bb__iscntrl == 0x7f; })
+
 /* In POSIX/C locale (the only locale we care about: do we REALLY want
  * to allow Unicode whitespace in, say, .conf files? nuts!)
  * isspace is only these chars: "\t\n\v\f\r" and space.
  * "\t\n\v\f\r" happen to have ASCII codes 9,10,11,12,13.
  * Use that.
  */
-#undef isspace
 #define isspace(a) ({ unsigned char bb__isspace = (a) - 9; bb__isspace == (' ' - 9) || bb__isspace <= (13 - 9); })
 
+
 #define ARRAY_SIZE(x) ((unsigned)(sizeof(x) / sizeof((x)[0])))
 
 
diff --git a/loginutils/login.c b/loginutils/login.c
index ed2ab7f80..70e85625b 100644
--- a/loginutils/login.c
+++ b/loginutils/login.c
@@ -225,19 +225,22 @@ static void get_username_or_die(char *buf, int size_buf)
         /* skip whitespace */
         do {
                 c = getchar();
-                if (c == EOF) exit(EXIT_FAILURE);
+                if (c == EOF)
+                        exit(EXIT_FAILURE);
                 if (c == '\n') {
-                        if (!--cntdown) exit(EXIT_FAILURE);
+                        if (!--cntdown)
+                                exit(EXIT_FAILURE);
                         goto prompt;
                 }
-        } while (isspace(c));
+        } while (isspace(c)); /* maybe isblank? */
 
         *buf++ = c;
         if (!fgets(buf, size_buf-2, stdin))
                 exit(EXIT_FAILURE);
         if (!strchr(buf, '\n'))
                 exit(EXIT_FAILURE);
-        while (isgraph(*buf)) buf++;
+        while ((unsigned char)*buf > ' ')
+                buf++;
         *buf = '\0';
 }
 
diff --git a/shell/lash_unused.c b/shell/lash_unused.c
index f71daf236..107ce88f6 100644
--- a/shell/lash_unused.c
+++ b/shell/lash_unused.c
@@ -841,7 +841,7 @@ static int expand_arguments(char *command)
                                 num_skip_chars = 1;
                         } else {
                                 src = dst + 1;
-                                while ((isalnum)(*src) || *src == '_') src++;
+                                while (isalnum(*src) || *src == '_') src++;
                         }
                         if (src == NULL) {
                                 src = dst+dstlen;
diff --git a/util-linux/fdisk.c b/util-linux/fdisk.c
index 1bb3a9d4e..6a194fd1a 100644
--- a/util-linux/fdisk.c
+++ b/util-linux/fdisk.c
@@ -460,7 +460,7 @@ read_line(const char *prompt)
                 line_buffer[--sz] = '\0';
 
         line_ptr = line_buffer;
-        while (*line_ptr && !isgraph(*line_ptr))
+        while (*line_ptr != '\0' && (unsigned char)*line_ptr <= ' ')
                 line_ptr++;
         return *line_ptr;
 }
diff --git a/util-linux/ipcrm.c b/util-linux/ipcrm.c
index 5dcda859a..5e18c2846 100644
--- a/util-linux/ipcrm.c
+++ b/util-linux/ipcrm.c
@@ -122,7 +122,7 @@ int ipcrm_main(int argc, char **argv)
         while ((c = getopt(argc, argv, "q:m:s:Q:M:S:h?")) != -1) {
                 int result;
                 int id = 0;
-                int iskey = (isupper)(c);
+                int iskey = isupper(c);
 
                 /* needed to delete semaphores */
                 union semun arg;