Commonalize typical [b,]k,m suffix struct

function                                             old     new   delta
bkm_suffixes                                           -      32     +32
static.km_suffixes                                    24       -     -24
suffixes                                              32       -     -32
static.bkm                                            32       -     -32
head_tail_suffixes                                    32       -     -32
------------------------------------------------------------------------------
(add/remove: 2/6 grow/shrink: 0/0 up/down: 72/-160)           Total: -88 bytes

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

TODO

@@ -132,11 +132,6 @@ stty / catv
   stty's visible() function and catv's guts are identical. Merge them into
   an appropriate libbb function.
 ---
-struct suffix_mult
-  Several duplicate users of: grep -r "1024\*1024" * -B2 -A1
-  Merge to a single size_suffixes[] in libbb.
-  Users: head tail od_bloaty hexdump and (partially as it wouldn't hurt) svlogd
----
 tail
   ./busybox tail -f foo.c~ TODO
   should not print fmt=header_fmt for subsequent date >> TODO; i.e. only

coreutils/head.c

@@ -12,7 +12,6 @@
 /* http://www.opengroup.org/onlinepubs/007904975/utilities/head.html */
 
 //kbuild:lib-$(CONFIG_HEAD) += head.o
-//kbuild:lib-$(CONFIG_HEAD) += head_tail.o
 
 //usage:#define head_trivial_usage
 //usage:       "[OPTIONS] [FILE]..."
@@ -35,7 +34,6 @@
 //usage:       "daemon:x:1:1:daemon:/usr/sbin:/bin/sh\n"
 
 #include "libbb.h"
-#include "head_tail.h"
 
 /* This is a NOEXEC applet. Be very careful! */
 
@@ -140,7 +138,7 @@ eat_num(bool *negative_N, const char *p)
 		p++;
 	}
 #endif
-	return xatoul_sfx(p, head_tail_suffixes);
+	return xatoul_sfx(p, bkm_suffixes);
 }
 
 static const char head_opts[] ALIGN1 =

coreutils/head_tail.c

@@ -1,14 +0,0 @@
-/*
- * Copyright (C) 2013 Denys Vlasenko
- *
- * Licensed under GPLv2, see file LICENSE in this source tree.
- */
-#include "libbb.h"
-#include "head_tail.h"
-
-const struct suffix_mult head_tail_suffixes[] = {
-	{ "b", 512 },
-	{ "k", 1024 },
-	{ "m", 1024*1024 },
-	{ "", 0 }
-};

coreutils/head_tail.h

@@ -1,6 +0,0 @@
-/*
- * Copyright (C) 2013 Denys Vlasenko
- *
- * Licensed under GPLv2, see file LICENSE in this source tree.
- */
-extern const struct suffix_mult head_tail_suffixes[];

coreutils/od_bloaty.c

@@ -1166,12 +1166,6 @@ parse_old_offset(const char *s, off_t *offset)
 int od_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
 int od_main(int argc UNUSED_PARAM, char **argv)
 {
-	static const struct suffix_mult bkm[] = {
-		{ "b", 512 },
-		{ "k", 1024 },
-		{ "m", 1024*1024 },
-		{ "", 0 }
-	};
 #if ENABLE_LONG_OPTS
 	static const char od_longopts[] ALIGN1 =
 		"skip-bytes\0"        Required_argument "j"
@@ -1230,7 +1224,7 @@ int od_main(int argc UNUSED_PARAM, char **argv)
 		address_pad_len_char = doxn_address_pad_len_char[pos];
 	}
 	if (opt & OPT_N) {
-		max_bytes_to_format = xstrtooff_sfx(str_N, 0, bkm);
+		max_bytes_to_format = xstrtooff_sfx(str_N, 0, bkm_suffixes);
 	}
 	if (opt & OPT_a) decode_format_string("a");
 	if (opt & OPT_b) decode_format_string("oC");
@@ -1239,7 +1233,7 @@ int od_main(int argc UNUSED_PARAM, char **argv)
 	if (opt & OPT_f) decode_format_string("fF");
 	if (opt & OPT_h) decode_format_string("x2");
 	if (opt & OPT_i) decode_format_string("d2");
-	if (opt & OPT_j) n_bytes_to_skip = xstrtooff_sfx(str_j, 0, bkm);
+	if (opt & OPT_j) n_bytes_to_skip = xstrtooff_sfx(str_j, 0, bkm_suffixes);
 	if (opt & OPT_l) decode_format_string("d4");
 	if (opt & OPT_o) decode_format_string("o2");
 	while (lst_t) {
@@ -1248,7 +1242,7 @@ int od_main(int argc UNUSED_PARAM, char **argv)
 	if (opt & OPT_x) decode_format_string("x2");
 	if (opt & OPT_s) decode_format_string("d2");
 	if (opt & OPT_S) {
-		string_min = xstrtou_sfx(str_S, 0, bkm);
+		string_min = xstrtou_sfx(str_S, 0, bkm_suffixes);
 	}
 
 	// Bloat:

coreutils/split.c

@@ -23,17 +23,15 @@
 
 #include "libbb.h"
 
-static const struct suffix_mult split_suffices[] = {
 #if ENABLE_FEATURE_SPLIT_FANCY
+static const struct suffix_mult split_suffixes[] = {
 	{ "b", 512 },
-#endif
 	{ "k", 1024 },
 	{ "m", 1024*1024 },
-#if ENABLE_FEATURE_SPLIT_FANCY
 	{ "g", 1024*1024*1024 },
-#endif
 	{ "", 0 }
 };
+#endif
 
 /* Increment the suffix part of the filename.
  * Returns NULL if we are out of filenames.
@@ -86,7 +84,10 @@ int split_main(int argc UNUSED_PARAM, char **argv)
 	if (opt & SPLIT_OPT_l)
 		cnt = XATOOFF(count_p);
 	if (opt & SPLIT_OPT_b) // FIXME: also needs XATOOFF
-		cnt = xatoull_sfx(count_p, split_suffices);
+		cnt = xatoull_sfx(count_p,
+				IF_FEATURE_SPLIT_FANCY(split_suffixes)
+				IF_NOT_FEATURE_SPLIT_FANCY(km_suffixes)
+		);
 	sfx = "x";
 
 	argv += optind;

coreutils/tail.c

@@ -25,7 +25,6 @@
  */
 
 //kbuild:lib-$(CONFIG_TAIL) += tail.o
-//kbuild:lib-$(CONFIG_TAIL) += head_tail.o
 
 //usage:#define tail_trivial_usage
 //usage:       "[OPTIONS] [FILE]..."
@@ -51,7 +50,6 @@
 //usage:       "nameserver 10.0.0.1\n"
 
 #include "libbb.h"
-#include "head_tail.h"
 
 struct globals {
 	bool from_top;
@@ -89,7 +87,7 @@ static unsigned eat_num(const char *p)
 		p++;
 		G.from_top = 1;
 	}
-	return xatou_sfx(p, head_tail_suffixes);
+	return xatou_sfx(p, bkm_suffixes);
 }
 
 int tail_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;

include/libbb.h

@@ -832,6 +832,9 @@ struct suffix_mult {
 	char suffix[4];
 	unsigned mult;
 };
+extern const struct suffix_mult bkm_suffixes[];
+#define km_suffixes (bkm_suffixes + 1)
+
 #include "xatonum.h"
 /* Specialized: */
 

libbb/xatonum.c

@@ -68,3 +68,10 @@ uint16_t FAST_FUNC xatou16(const char *numstr)
 {
 	return xatou_range(numstr, 0, 0xffff);
 }
+
+const struct suffix_mult bkm_suffixes[] = {
+	{ "b", 512 },
+	{ "k", 1024 },
+	{ "m", 1024*1024 },
+	{ "", 0 }
+};

runit/svlogd.c

@@ -745,11 +745,6 @@ static NOINLINE unsigned logdir_open(struct logdir *ld, const char *fn)
 				ld->inst = new;
 				break;
 			case 's': {
-				static const struct suffix_mult km_suffixes[] = {
-					{ "k", 1024 },
-					{ "m", 1024*1024 },
-					{ "", 0 }
-				};
 				ld->sizemax = xatou_sfx(&s[1], km_suffixes);
 				break;
 			}

util-linux/hexdump.c

@@ -66,13 +66,6 @@ static const char add_first[] ALIGN1 = "\"%07.7_Ax\n\"";
 
 static const char hexdump_opts[] ALIGN1 = "bcdoxCe:f:n:s:v" IF_FEATURE_HEXDUMP_REVERSE("R");
 
-static const struct suffix_mult suffixes[] = {
-	{ "b", 512 },
-	{ "k", 1024 },
-	{ "m", 1024*1024 },
-	{ "", 0 }
-};
-
 int hexdump_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
 int hexdump_main(int argc, char **argv)
 {
@@ -120,7 +113,7 @@ int hexdump_main(int argc, char **argv)
 				optarg,
 				/*base:*/ 0,
 				/*lo:*/ 0, /*hi:*/ OFF_T_MAX,
-				suffixes
+				bkm_suffixes
 			);
 		} /* else */
 		if (ch == 'v') {