add bclib from plan 9 sources

add post-install and pre-uninstall targets to tools using yacc.mk
mirroring those in std.mk in order to install and uninstall bclib

awk/Makefile

@@ -7,3 +7,7 @@ YFILES	  = awkgram.y
 MANFILES  = awk.1
 
 include ../yacc.mk
+
+pre-uninstall:
+
+post-install:

bc/Makefile

@@ -10,3 +10,10 @@ include ../yacc.mk
 
 # Solaris
 #LDFLAGS += -dy -lxnet
+
+pre-uninstall:
+	rm -f ${DESTDIR}${PREFIX}/lib/bclib
+
+post-install:
+	@mkdir -p ${DESTDIR}${PREFIX}/lib
+	@cp bclib ${DESTDIR}${PREFIX}/lib/

bc/bclib

@@ -0,0 +1,246 @@
+scale = 50
+define e(x) {
+	auto a, b, c, d, e, g, w, y, t, r
+
+	r = ibase
+	ibase = A
+
+	t = scale
+	scale = t + .434*x + 1
+
+	w = 0
+	if(x<0) {
+		x = -x
+		w = 1
+	}
+	y = 0
+	while(x>2) {
+		x /= 2
+		y++
+	}
+
+	a = 1
+	b = 1
+	c = b
+	d = 1
+	e = 1
+	for(a=1; 1; a++) {
+		b *= x
+		c = c*a+b
+		d *= a
+		g = c/d
+		if(g == e) {
+			g = g/1
+			while(y--) {
+				g *= g
+			}
+			scale = t
+			if(w==1) {
+				ibase = r
+				return 1/g
+			}
+			ibase = r
+			return g/1
+		}
+		e = g
+	}
+}
+
+define l(x) {
+	auto a, b, c, d, e, f, g, u, s, t, r, z
+
+	r = ibase
+	ibase = A
+	if(x <= 0) {
+		z = 1-10^scale
+		ibase = r
+		return z
+	}
+	t = scale
+
+	f = 1
+	scale += scale(x) - length(x) + 1
+	s = scale
+	while(x > 2) {
+		s += (length(x)-scale(x))/2 + 1
+		if(s>0) {
+			scale = s
+		}
+		x = sqrt(x)
+		f *= 2
+	}
+	while(x < .5) {
+		s += (length(x)-scale(x))/2 + 1
+		if(s>0) {
+			scale = s
+		}
+		x = sqrt(x)
+		f *= 2
+	}
+
+	scale = t + length(f) - scale(f) + 1
+	u = (x-1)/(x+1)
+
+	scale += 1.1*length(t) - 1.1*scale(t)
+	s = u*u
+	b = 2*f
+	c = b
+	d = 1
+	e = 1
+	for(a=3; 1; a=a+2){
+		b *= s
+		c = c*a + d*b
+		d *= a
+		g = c/d
+		if(g==e) {
+			scale = t
+			ibase = r
+			return u*c/d
+		}
+		e = g
+	}
+}
+
+define s(x) {
+	auto a, b, c, s, t, y, p, n, i, r
+
+	r = ibase
+	ibase = A
+	t = scale
+	y = x/.7853
+	s = t + length(y) - scale(y)
+	if(s<t) {
+		s = t
+	}
+	scale = s
+	p = a(1)
+
+	scale = 0
+	if(x>=0) {
+		n = (x/(2*p)+1)/2
+	}
+	if(x<0) {
+		n = (x/(2*p)-1)/2
+	}
+	x -= 4*n*p
+	if(n%2 != 0) {
+		x = -x
+	}
+
+	scale = t + length(1.2*t) - scale(1.2*t)
+	y = -x*x
+	a = x
+	b = 1
+	s = x
+	for(i=3; 1; i+=2) {
+		a *= y
+		b *= i*(i-1)
+		c = a/b
+		if(c==0){
+			scale = t
+			ibase = r
+			return s/1
+		}
+		s += c
+	}
+}
+
+define c(x) {
+	auto t, r
+
+	r = ibase
+	ibase = A
+	t = scale
+	scale = scale+1
+	x = s(x + 2*a(1))
+	scale = t
+	ibase = r
+	return x/1
+}
+
+define a(x) {
+	auto a, b, c, d, e, f, g, s, t, r, z
+
+	r = ibase
+	ibase = A
+	if(x==0) {
+		return 0
+	}
+	if(x==1) {
+		z = .7853981633974483096156608458198757210492923498437764/1
+		ibase = r
+		if(scale<52) {
+			return z
+		}
+	}
+	t = scale
+	f = 1
+	while(x > .5) {
+		scale++
+		x = -(1 - sqrt(1.+x*x))/x
+		f *= 2
+	}
+	while(x < -.5) {
+		scale++
+		x = -(1 - sqrt(1.+x*x))/x
+		f *= 2
+	}
+	s = -x*x
+	b = f
+	c = f
+	d = 1
+	e = 1
+	for(a=3; 1; a+=2) {
+		b *= s
+		c = c*a + d*b
+		d *= a
+		g = c/d
+		if(g==e) {
+			scale = t
+			ibase = r
+			return x*c/d
+		}
+		e = g
+	}
+}
+
+define j(n,x) {
+	auto a,b,c,d,e,g,i,s,k,t,r
+
+	r = ibase
+	ibase = A
+
+	t = scale
+	k = 1.36*x + 1.16*t - n
+	k = length(k) - scale(k)
+	if(k>0) {
+		scale += k
+	}
+
+	s = -x*x/4
+	if(n<0) {
+		n = -n
+		x = -x
+	}
+	a = 1
+	c = 1
+	for(i=1; i<=n; i++) {
+		a *= x
+		c *= 2*i
+	}
+	b = a
+	d = 1
+	e = 1
+	for(i=1; 1; i++) {
+		a *= s
+		b = b*i*(n+i) + a
+		c *= i*(n+i)
+		g = b/c
+		if(g==e) {
+			scale = t
+			ibase = r
+			return g/1
+		}
+		e = g
+	}
+}

grep/Makefile

@@ -7,3 +7,7 @@ YFILES    = grep.y
 MANFILES  = grep.1
 
 include ../yacc.mk
+
+pre-uninstall:
+
+post-install:

hoc/Makefile

@@ -7,3 +7,7 @@ YFILES    = hoc.y
 MANFILES  = hoc.1
 
 include ../yacc.mk
+
+pre-uninstall:
+
+post-install:

yacc.mk

@@ -14,7 +14,9 @@ depend:
 	@echo YACC ${YFILES}
 	@${YACC} -d ${YFILES}
 
-install: ${TARG}
+install: install-default post-install
+
+install-default: ${TARG}
 	@mkdir -p ${DESTDIR}${PREFIX}/bin
 	@cp -f ${TARG} ${DESTDIR}${PREFIX}/bin/
 	@chmod 755 ${DESTDIR}${PREFIX}/bin/${TARG}
@@ -22,7 +24,7 @@ install: ${TARG}
 	@cp -f ${MANFILES} ${DESTDIR}${MANPREFIX}/man1
 	@chmod 444 ${DESTDIR}${MANPREFIX}/man1/${MANFILES}
 
-uninstall:
+uninstall: pre-uninstall
 	rm -f ${DESTDIR}${PREFIX}/bin/${TARG}
 	rm -f ${DESTDIR}${MANPREFIX}/man1/${MANFILES}