ref: b5ddbc86346fddc60360a817ee62bc8ca938973e
parent: d58df01f3ea2de8d41e10d5387445027e59a6c4e
author: S. Gilles <sgilles@math.umd.edu>
date: Mon Sep 9 03:10:55 EDT 2019
Specify sigfigs (cutoff + Relative mode) for fltXY formatting
--- a/lib/std/fltfmt.myr
+++ b/lib/std/fltfmt.myr
@@ -17,7 +17,7 @@
pkglocal type fltparams = struct
mode : int
- prec : int
+ cutoff : size
padto : size
padfill : char
;;
@@ -45,7 +45,7 @@
var valsb = mksb()
exp = max(exp, 1 - Dblbias)
- dragon4(valsb, false, mant, exp - 52, Dblbias, opts.mode, opts.prec)
+ dragon4(valsb, false, mant, exp - 52, Dblbias, opts.mode, opts.cutoff)
-> blobfmt(sb, sbfin(valsb), opts, isneg)
}
@@ -66,7 +66,7 @@
var valsb = mksb()
exp = (max((exp : int64), 1 - Fltbias) : int32)
- dragon4(valsb, false, (mant : uint64), (exp - 23 : int64), Fltbias, opts.mode, opts.prec)
+ dragon4(valsb, false, (mant : uint64), (exp - 23 : int64), Fltbias, opts.mode, opts.cutoff)
-> blobfmt(sb, sbfin(valsb), opts, isneg)
}
@@ -209,16 +209,19 @@
else
if mode == MRelative
cutoff += k - 1
+ a = cutoff - k + 1
+ else
+ a = cutoff
;;
+
/* common between relative and absolute */
- a = cutoff - k - 1
y = bigdup(s)
if a < 0
- for i = 0; i < a; i++
+ for i = 0; i < -a; i++
bigmuli(y, 10)
;;
else
- for i = 0; i < -a; i++
+ for i = 0; i < a; i++
bigaddi(y, 9)
bigdivi(y, 10)
;;
@@ -227,15 +230,16 @@
| `Before: /* nothing */
| _:
bigfree(mm)
- mm = y
+ mm = bigdup(y)
;;
match bigcmp(y, mp)
| `Before: /* nothing */
| _:
bigfree(mp)
- mp = y
+ mp = bigdup(y)
roundup = true
;;
+ bigfree(y)
;;
u = bigdup(s)
bigshli(u, 1)
--- a/lib/std/fmt.myr
+++ b/lib/std/fmt.myr
@@ -453,7 +453,7 @@
fp = [
.mode = MNormal,
- .prec = 0,
+ .cutoff = 0,
.padfill = ' ',
.padto = 0,
]
@@ -462,6 +462,9 @@
match p
| ("w", wid): fp.padto = getint(wid, "fmt: width must be integer") | ("p", pad): fp.padfill = decode(pad)+ | ("s", sig):+ fp.mode = MRelative
+ fp.cutoff = getint(sig, "fmt: significant figures must be integer")
| (opt, arg):
std.write(2, "fmt: ")
std.write(2, opt)
--- a/lib/std/test/fltfmt.myr
+++ b/lib/std/test/fltfmt.myr
@@ -11,6 +11,7 @@
[.name = "putinteger", .fn = putinteger],
[.name = "putlowprec", .fn = putlowprec],
[.name = "padding", .fn = padding],
+ [.name = "sigfigs", .fn = sigfigs],
][:])
}
@@ -88,7 +89,7 @@
f64 = 1.0
exp = "XXXX1.0"
act = std.fmt("{w=7,p=X}", f64)- testr.check(c, std.eq(exp, act), "{} should format [flt32] to \"{}\", was \"{}\"", f64, exp, act)+ testr.check(c, std.eq(exp, act), "{} should format [flt64] to \"{}\", was \"{}\"", f64, exp, act)f32 = -2.5
exp = "YYYYYY-2.5"
@@ -98,7 +99,7 @@
f64 = -100000.5
exp = "-100000.5"
act = std.fmt("{w=9,p=Y}", f64)- testr.check(c, std.eq(exp, act), "{} should format [flt32] to \"{}\", was \"{}\"", f64, exp, act)+ testr.check(c, std.eq(exp, act), "{} should format [flt64] to \"{}\", was \"{}\"", f64, exp, act)f32 = -13.25
exp = "-013.25"
@@ -113,5 +114,56 @@
f64 = std.flt64nan()
exp = " NaN"
act = std.fmt("{w=18,p= }", f64)- testr.check(c, std.eq(exp, act), "{} should format [flt32] to \"{}\", was \"{}\"", f64, exp, act)+ testr.check(c, std.eq(exp, act), "{} should format [flt64] to \"{}\", was \"{}\"", f64, exp, act)+}
+
+const sigfigs = {c+ var exp, act
+ var f32 : flt32
+ var f64 : flt64
+
+ f32 = 9.1234
+ exp = "9.12"
+ act = std.fmt("{s=3}", f32)+ testr.check(c, std.eq(exp, act), "{} should format [flt32] to \"{}\", was \"{}\"", f32, exp, act)+
+ f64 = 19.1234
+ exp = "19.123"
+ act = std.fmt("{s=5}", f64)+ testr.check(c, std.eq(exp, act), "{} should format [flt64] to \"{}\", was \"{}\"", f64, exp, act)+
+ f64 = 104.9
+ exp = "100.0"
+ act = std.fmt("{s=2}", f64)+ testr.check(c, std.eq(exp, act), "{} should format [flt64] to \"{}\", was \"{}\"", f64, exp, act)+
+ f64 = 105.1
+ exp = "110.0"
+ act = std.fmt("{s=2}", f64)+ testr.check(c, std.eq(exp, act), "{} should format [flt64] to \"{}\", was \"{}\"", f64, exp, act)+
+ f64 = 12345.6789
+ exp = "12345.6789"
+ act = std.fmt("{s=200}", f64)+ testr.check(c, std.eq(exp, act), "{} should format [flt64] to \"{}\", was \"{}\"", f64, exp, act)+
+ f64 = 12345.6789
+ exp = "12345.679"
+ act = std.fmt("{s=8}", f64)+ testr.check(c, std.eq(exp, act), "{} should format [flt64] to \"{}\", was \"{}\"", f64, exp, act)+
+ f32 = -13.49
+ exp = "-13.5"
+ act = std.fmt("{s=3}", f32)+ testr.check(c, std.eq(exp, act), "{} should format [flt32] to \"{}\", was \"{}\"", f32, exp, act)+
+ f32 = -13.53
+ exp = "-13.5"
+ act = std.fmt("{s=3}", f32)+ testr.check(c, std.eq(exp, act), "{} should format [flt32] to \"{}\", was \"{}\"", f32, exp, act)+
+ f32 = -13.53
+ exp = "-10.0"
+ act = std.fmt("{s=-23}", f32)+ testr.check(c, std.eq(exp, act), "{} should format [flt32] to \"{}\", was \"{}\"", f32, exp, act)}