Import new 2-clause BSD licenced implementation of the bc and dc commands

These implementations of the bc and dc programs offer a number of advantages
compared to the current implementations in the FreeBSD base system:

- They do not depend on external large number functions (i.e. no dependency
  on OpenSSL or any other large number library)

- They implements all features found in GNU bc/dc (with the exception of
  the forking of sub-processes, which the author of this version considers
  as a security issue).

- They are significantly faster than the current code in base (more than
  2 orders of magnitude in some of my tests, e.g. for 12345^100000).

- They should be fully compatible with all features and the behavior of the
  current implementations in FreeBSD (not formally verified).

- They support POSIX message catalogs and come with localized messages in
  Chinese, Dutch, English, French, German, Japanese, Polish, Portugueze,
  and Russian.

- They offer very detailed man-pages that provide far more information than
  the current ones.

The upstream sources contain a large number of tests, which are not
imported with this commit. They could be integrated into our test
framework at a latter time.

Installation of this version is controlled by the option "MK_GH_BC=yes".
This option will be set to yes by default in 13-CURRENT, but will be off
by default in 12-STABLE.

Approved by:	imp
Obtained from:	https://git.yzena.com/gavin/bc
MFC after:	4 weeks
Relnotes:	yes
Differential Revision:	https://reviews.freebsd.org/D19982

2 files changed, 106 insertions, 2 deletions

diff --git a/usr.bin/Makefile b/usr.bin/Makefile
index de7c56d52b03..291f58deff30 100644
--- a/usr.bin/Makefile
+++ b/usr.bin/Makefile
@@ -214,6 +214,12 @@ SUBDIR.${MK_GAMES}+=	random
 .if ${COMPILER_FEATURES:Mc++11}
 SUBDIR+=	dtc
 .endif
+.if ${MK_GH_BC} == "yes"
+SUBDIR+=		gh-bc
+.else
+SUBDIR.${MK_OPENSSL}+=	bc
+SUBDIR.${MK_OPENSSL}+=	dc
+.endif
 SUBDIR.${MK_HESIOD}+=	hesinfo
 SUBDIR.${MK_ICONV}+=	iconv
 SUBDIR.${MK_ICONV}+=	mkcsmapper
@@ -238,9 +244,7 @@ SUBDIR.${MK_NIS}+=	ypcat
 SUBDIR.${MK_NIS}+=	ypmatch
 SUBDIR.${MK_NIS}+=	ypwhich
 SUBDIR.${MK_OPENSSH}+=	ssh-copy-id
-SUBDIR.${MK_OPENSSL}+=	bc
 SUBDIR.${MK_OPENSSL}+=	chkey
-SUBDIR.${MK_OPENSSL}+=	dc
 SUBDIR.${MK_OPENSSL}+=	newkey
 SUBDIR.${MK_QUOTAS}+=	quota
 SUBDIR.${MK_SENDMAIL}+=	vacation
diff --git a/usr.bin/gh-bc/Makefile b/usr.bin/gh-bc/Makefile
new file mode 100644
index 000000000000..f7718b75e92d
--- /dev/null
+++ b/usr.bin/gh-bc/Makefile
@@ -0,0 +1,100 @@
+# $FreeBSD$
+
+.include <src.opts.mk>
+
+PROG=		gh-bc
+PROGNAME=	bc
+
+BCDIR=		${SRCTOP}/contrib/${PROGNAME}
+BCVERSION!=	sed -n -e '/.*VERSION *= *[0-9]/s/.*VERSION *= *//p' ${BCDIR}/Makefile.in
+
+SRCS=		args.c data.c file.c lang.c lex.c main.c num.c parse.c program.c read.c vector.c vm.c
+SRCS+=		bc/bc.c bc/lex.c bc/parse.c dc/dc.c dc/lex.c dc/parse.c history/history.c
+SRCS+=		bc_help.c dc_help.c lib.c lib2.c opt.c rand/rand.c
+MAN=		bc.1 dc.1
+
+LINKS=		${BINDIR}/bc ${BINDIR}/dc
+
+.PATH:		${BCDIR}/src ${BCDIR}/gen ${BCDIR}/manuals ${.OBJDIR}
+
+CATALOGS=	en_US.UTF-8
+CATALOGS+=	de_DE.UTF-8 de_DE.ISO8859-1
+CATALOGS+=	fr_FR.UTF-8 fr_FR.ISO8859-1
+CATALOGS+=	ja_JP.UTF-8 ja_JP.eucJP
+CATALOGS+=	nl_NL.UTF-8 nl_NL.ISO8859-1
+CATALOGS+=	pl_PL.UTF-8 pl_PL.ISO8859-2
+CATALOGS+=	pt_PT.UTF-8 pt_PT.ISO8859-1
+CATALOGS+=	ru_RU.UTF-8 ru_RU.ISO8859-5 ru_RU.CP1251 ru_RU.CP866 ru_RU.KOI8-R
+CATALOGS+=	zh_CN.UTF-8 zh_CN.eucCN zh_CN.GB18030 zh_CN.GB2312 zh_CN.GBK
+
+NLSNAME=	bc
+NLSSRCDIR=	${BCDIR}/locales
+
+CFLAGS+=	-DMAINEXEC=${PROGNAME}
+CFLAGS+=	-DNLSPATH=/usr/share/nls/%L/%N.cat
+CFLAGS+=	-DBC_ENABLED
+CFLAGS+=	-DBC_ENABLE_PROMPT
+CFLAGS+=	-DBC_ENABLE_LONG_OPTIONS
+CFLAGS+=	-DBC_ENABLE_EXTRA_MATH
+CFLAGS+=	-DBC_ENABLE_HISTORY
+CFLAGS+=	-DBC_ENABLE_SIGNALS=0
+CFLAGS+=	-DBC_NUM_KARATSUBA_LEN=64
+CFLAGS+=	-DDC_ENABLED
+CFLAGS+=	-DNDEBUG
+CFLAGS+=	-DVERSION=${BCVERSION}
+CFLAGS+=	-I${BCDIR}/include
+
+.if ${MK_NLS_CATALOGS} == "no"
+CFLAGS+=	-DBC_ENABLE_NLS=0
+.else
+CFLAGS+=	-DBC_ENABLE_NLS=1
+
+# prevent floating point incompatibilities caused by -flto on some architectures
+.if ${MACHINE_ARCH} != mips && ${MACHINE_ARCH} != mips64 && ${MACHINE_ARCH} != riscv64
+CFLAGS+=	-flto
+.endif
+
+.for catalog in ${CATALOGS}
+NLS+=           ${catalog:C/.*://}
+NLSSRCFILES_${catalog:C/.*://}= ${catalog:C/.*://}.msg
+.endfor
+
+NLSLINKS_en_US.UTF-8+=	en_AU.UTF-8 en_CA.UTF-8 en_GB.UTF-8 en_IE.UTF-8 \
+			en_NZ.UTF-8 C
+NLSLINKS_en_US.UTF-8+=	en_AU.US-ASCII en_CA.US-ASCII en_GB.US-ASCII \
+			en_NZ.US-ASCII
+NLSLINKS_en_US.UTF-8+=	en_AU.ISO8859-1 en_CA.ISO8859-1 en_GB.ISO8859-1 \
+			en_NZ.ISO8859-1 en_US.ISO8859-1
+NLSLINKS_en_US.UTF-8+=	en_AU.ISO8859-15 en_CA.ISO8859-15 en_GB.ISO8859-15 \
+			en_NZ.ISO8859-15 en_US.ISO8859-15
+
+NLSLINKS_de_DE.UTF-8+=	de_AT.UTF-8 de_CH.UTF-8
+NLSLINKS_de_DE.ISO8859-1+= de_AT.ISO8859-1 de_CH.ISO8859-1
+NLSLINKS_de_DE.ISO8859-1+= de_AT.ISO8859-15 de_CH.ISO8859-15 de_DE.ISO8859-15
+
+NLSLINKS_fr_FR.UTF-8+=	fr_BE.UTF-8 fr_CA.UTF-8 fr_CH.UTF-8
+NLSLINKS_fr_FR.ISO8859-1+= fr_BE.ISO8859-1 fr_CA.ISO8859-1 fr_CH.ISO8859-1
+NLSLINKS_fr_FR.ISO8859-1+= fr_BE.ISO8859-15 fr_CA.ISO8859-15 fr_CH.ISO8859-15 \
+			fr_FR.ISO8859-15
+
+NLSLINKS_nl_NL.ISO8859-1+= nl_BE.ISO8859-1
+NLSLINKS_nl_NL.ISO8859-1+= nl_BE.ISO8859-15 nl_NL.ISO8859-15
+
+NLSLINKS_pt_PT.UTF-8+=	pt_BR.UTF-8
+NLSLINKS_pt_PT.ISO8859-1+= pt_BR.ISO8859-1
+NLSLINKS_pt_PT.ISO8859-1+= pt_PT.ISO8859-15
+.endif
+
+lib.c:		lib.bc
+		cd ${BCDIR} && sh gen/strgen.sh gen/lib.bc ${.OBJDIR}/lib.c bc_lib bc.h bc_lib_name 1 1
+
+lib2.c:		lib2.bc
+		cd ${BCDIR} && sh gen/strgen.sh gen/lib2.bc ${.OBJDIR}/lib2.c bc_lib2 bc.h bc_lib2_name 1 1
+
+bc_help.c:	bc_help.txt
+		cd ${BCDIR} && sh gen/strgen.sh gen/bc_help.txt ${.OBJDIR}/bc_help.c bc_help bc.h
+
+dc_help.c:	dc_help.txt
+		cd ${BCDIR} && sh gen/strgen.sh gen/dc_help.txt ${.OBJDIR}/dc_help.c dc_help dc.h
+
+.include <bsd.prog.mk>