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- /* lib.b 4.1 83/04/02 */
- /*
- */
-
- scale = 20
- define e(x){
- auto a, b, c, d, e, g, w, y
-
- t = scale
- scale = t + .434*x + 1
-
- w = 0
- if(x<0){
- x = -x
- w = 1
- }
- y = 0
- while(x>2){
- x = x/2
- y = y + 1
- }
-
- a=1
- b=1
- c=b
- d=1
- e=1
- for(a=1;1==1;a++){
- b=b*x
- c=c*a+b
- d=d*a
- g = c/d
- if(g == e){
- g = g/1
- while(y--){
- g = g*g
- }
- scale = t
- if(w==1) return(1/g)
- return(g/1)
- }
- e=g
- }
- }
-
- define l(x){
- auto a, b, c, d, e, f, g, u, s, t
- if(x <=0) return(1-10^scale)
- t = scale
-
- f=1
- scale = scale + scale(x) - length(x) + 1
- s=scale
- while(x > 2){
- s = s + (length(x)-scale(x))/2 + 1
- if(s>0) scale = s
- x = sqrt(x)
- f=f*2
- }
- while(x < .5){
- s = s + (length(x)-scale(x))/2 + 1
- if(s>0) scale = s
- x = sqrt(x)
- f=f*2
- }
-
- scale = t + length(f) - scale(f) + 1
- u = (x-1)/(x+1)
-
- scale = 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==1;a=a+2){
- b=b*s
- c=c*a+d*b
- d=d*a
- g=c/d
- if(g==e){
- scale = t
- return(u*c/d)
- }
- e=g
- }
- }
-
- define s(x){
- auto a, b, c, s, t, y, p, n, i
- 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 = 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==1; i=i+2){
- a = a*y
- b = b*i*(i-1)
- c = a/b
- if(c==0){scale=t; return(s/1)}
- s = s+c
- }
- }
-
- define c(x){
- auto t
- t = scale
- scale = scale+1
- x = s(x+2*a(1))
- scale = t
- return(x/1)
- }
-
- define a(x){
- auto a, b, c, d, e, f, g, s, t
- if(x==0) return(0)
- if(x==1) {
- if(scale<52) {
- return(.7853981633974483096156608458198757210492923498437764/1)
- }
- }
- t = scale
- f=1
- while(x > .5){
- scale = scale + 1
- x= -(1-sqrt(1.+x*x))/x
- f=f*2
- }
- while(x < -.5){
- scale = scale + 1
- x = -(1-sqrt(1.+x*x))/x
- f=f*2
- }
- s = -x*x
- b = f
- c = f
- d = 1
- e = 1
- for(a=3;1==1;a=a+2){
- b=b*s
- c=c*a+d*b
- d=d*a
- g=c/d
- if(g==e){
- scale = t
- return(x*c/d)
- }
- e=g
- }
- }
-
- define j(n,x){
- auto a,b,c,d,e,g,i,s,k,t
-
- t = scale
- k = 1.36*x + 1.16*t - n
- k = length(k) - scale(k)
- if(k>0) scale = scale + k
-
- s= -x*x/4
- if(n<0){
- n= -n
- x= -x
- }
- a=1
- c=1
- for(i=1;i<=n;i++){
- a=a*x
- c = c*2*i
- }
- b=a
- d=1
- e=1
- for(i=1;1;i++){
- a=a*s
- b=b*i*(n+i) + a
- c=c*i*(n+i)
- g=b/c
- if(g==e){
- scale = t
- return(g/1)
- }
- e=g
- }
- }
-