*: 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>

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];

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 */

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])))
 
 

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';
 }
 

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;

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;
 }

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;