ref: c8a5f3d79cd198facac5491f20249f6945db62b9
dir: /lib/std/fmt.myr/
use "alloc"
use "consts"
use "chartype"
use "die"
use "extremum"
use "fltfmt"
use "hashfuncs"
use "hasprefix"
use "htab"
use "intfmt"
use "intparse"
use "introspect"
use "memops"
use "option"
use "result"
use "sldup"
use "slpush"
use "sleq"
use "strbuf"
use "strfind"
use "striter"
use "strsplit"
use "syswrap"
use "syswrap-ss"
use "traits"
use "types"
use "utf"
use "varargs"
use "writeall"
pkg std =
/* write to fd */
const put : (fmt : byte[:], args : ... -> size)
const fput : (fd : fd, fmt : byte[:], args : ... -> size)
const putv : (fmt : byte[:], ap : valist# -> size)
const fputv : (fd : fd, fmt : byte[:], ap : valist# -> size)
/* write to buffer */
const fmt : (fmt : byte[:], args : ... -> byte[:])
const fmtv : (fmt : byte[:], ap : valist# -> byte[:])
const bfmt : (buf : byte[:], fmt : byte[:], args : ... -> byte[:])
const bfmtv : (buf : byte[:], fmt : byte[:], ap : valist# -> byte[:])
/* write to strbuf */
const sbfmt : (buf : strbuf#, fmt : byte[:], args : ... -> size)
const sbfmtv : (buf : strbuf#, fmt : byte[:], ap : valist# -> size)
/* add a formatter function */
const fmtinstall : (ty : byte[:], \
fn : (sb : strbuf#, ap : valist#, opts : (byte[:],byte[:])[:] -> void) \
-> void)
$noret const fatal : (fmt : byte[:], args : ... -> void)
$noret const fatalv : (fmt : byte[:], ap : valist# -> void)
;;
type parsestate = union
`Copy
`ParamOpt
`ParamArg
;;
const __init__ = {
fmtmap = mkht()
}
type fmtdesc = struct
fn : (sb : strbuf#, ap : valist#, opts : (byte[:],byte[:])[:] -> void)
;;
/* same as 'put', but exits the program after printing */
const fatal = {fmt, args
var ap
ap = vastart(&args)
fputv(Err, fmt, &ap)
exit(1)
}
/* same as 'putv', but exits the program after printing */
const fatalv = {fmt, ap
fputv(Err, fmt, ap)
exit(1)
}
var fmtmap : htab(byte[:], fmtdesc)#
const fmtinstall = {ty, fn
match std.htget(fmtmap, ty)
| `std.Some _: std.fatal("doubly installed format\n")
| `std.None: htput(fmtmap, ty, [.fn=fn])
;;
}
const put = {fmt, args
var ap
ap = vastart(&args)
-> fputv(1, fmt, &ap)
}
const putv = {fmt, ap
-> fputv(1, fmt, ap)
}
const fput = {fd, fmt, args
var ap
ap = vastart(&args)
-> fputv(fd, fmt, &ap)
}
const fputv = {fd, fmt, ap
var sb, s, nw
sb = mksb()
sbfmtv(sb, fmt, ap)
s = sbfin(sb)
match writeall(fd, s)
| `std.Ok n: nw += n
| `std.Err (n, _): nw += n
;;
slfree(s)
-> nw
}
const fmt = {fmt, args
var ap
ap = vastart(&args)
-> fmtv(fmt, &ap)
}
const fmtv = {fmt, ap
var sb
sb = mksb()
sbfmtv(sb, fmt, ap)
-> sbfin(sb)
}
const bfmt = {buf, fmt, args
var ap
ap = vastart(&args)
-> bfmtv(buf, fmt, &ap)
}
const bfmtv = {buf, fmt, ap
var sb
sb = mkbufsb(buf)
sbfmtv(sb, fmt, ap)
-> sbfin(sb)
}
const sbfmt = {sb, fmt, args
var ap
ap = vastart(&args)
-> sbfmtv(sb, fmt, &ap)
}
const sbfmtv = {sb, fmt, ap -> size
var buf : byte[256], param : (byte[:], byte[:])[8]
var state, startp, endp, starta, nbuf
var nparam
var b, i
startp = 0
starta = 0
nparam = 0
nbuf = 0
endp = 0
state = `Copy
i = 0
while i != fmt.len
b = fmt[i++]
match (state, (b : char))
/* raw bytes */
| (`Copy, '{'):
if (fmt[i] : char) == '{'
b = fmt[i++]
sbputb(sb, ('{' : byte))
else
state = `ParamOpt
nparam = 0
startp = 0
starta = 0
nbuf = 0
;;
| (`Copy, '}'):
if i == fmt.len || (fmt[i] : char) != '}'
die("unescaped '}'\n")
;;
sbputb(sb, ('}' : byte))
i++
| (`Copy, _):
sbputb(sb, b)
/* {param */
| (`ParamOpt, '='):
state = `ParamArg
endp = nbuf
starta = nbuf
| (`ParamOpt, ','):
if startp != nbuf
param[nparam++] = (buf[startp:nbuf], "")
;;
startp = nbuf
| (`ParamOpt, '}'):
state = `Copy
if startp != nbuf
param[nparam++] = (buf[startp:nbuf], "")
;;
if ap.tc.nelt < 1
die("too few values for fmt\n")
;;
fmtval(sb, vatype(ap), ap, param[:nparam])
| (`ParamOpt, '\\'):
buf[nbuf++] = fmt[i++]
| (`ParamOpt, chr):
buf[nbuf++] = b
/* {param=arg} */
| (`ParamArg, ','):
state = `ParamOpt
param[nparam++] = (buf[startp:endp], buf[starta:nbuf])
startp = nbuf
endp = nbuf
| (`ParamArg, '}'):
state = `Copy
if startp != nbuf
param[nparam++] = (buf[startp:endp], buf[starta:nbuf])
;;
if ap.tc.nelt < 1
die("too few values for fmt\n")
;;
fmtval(sb, vatype(ap), ap, param[:nparam])
| (`ParamArg, '\\'):
buf[nbuf++] = fmt[i++]
| (`ParamArg, chr):
buf[nbuf++] = b
;;
;;
if ap.tc.nelt != 0
die("too many values for fmt\n")
;;
-> sb.len
}
const fmtval = {sb, ty, ap, params
match htget(fmtmap, ty)
| `Some f:
f.fn(sb, ap, params)
| `None:
fallbackfmt(sb, params, ty, ap)
;;
}
const fallbackfmt = {sb, params, tyenc, ap : valist# -> void
/* value types */
var subap, subenc, subname
var inf, p
match typedesc(tyenc)
/* shows up in a union with no body */
| `Tynone:
/* atomic types */
| `Tyvoid:
var val : void = vanext(ap)
sbputs(sb, "void")
| `Tybool:
var val : bool = vanext(ap)
if val
sbputs(sb ,"true")
else
sbputs(sb, "false")
;;
| `Tychar:
var val : char = vanext(ap)
sbputc(sb, val)
| `Tyint8:
var val : int8 = vanext(ap)
intfmt(sb, intparams(ap, params), true, (val : uint64), 8)
| `Tyint16:
var val : int16 = vanext(ap)
intfmt(sb, intparams(ap, params), true, (val : uint64), 16)
| `Tyint:
var val : int = vanext(ap)
intfmt(sb, intparams(ap, params), true, (val : uint64), 32)
| `Tyint32:
var val : int32 = vanext(ap)
intfmt(sb, intparams(ap, params), true, (val : uint64), 32)
| `Tyint64:
var val : int64 = vanext(ap)
intfmt(sb, intparams(ap, params), true, (val : uint64), 64)
| `Tybyte:
var val : byte = vanext(ap)
intfmt(sb, intparams(ap, params), false, (val : uint64), 8)
| `Tyuint8:
var val : uint8 = vanext(ap)
intfmt(sb, intparams(ap, params), false, (val : uint64), 8)
| `Tyuint16:
var val : uint16 = vanext(ap)
intfmt(sb, intparams(ap, params), false, (val : uint64), 16)
| `Tyuint:
var val : uint = vanext(ap)
intfmt(sb, intparams(ap, params), false, (val : uint64), 32)
| `Tyuint32:
var val : uint32 = vanext(ap)
intfmt(sb, intparams(ap, params), false, (val : uint64), 32)
| `Tyuint64:
var val : uint64 = vanext(ap)
intfmt(sb, intparams(ap, params), false, (val : uint64), 64)
| `Tyflt32:
var val : flt32 = vanext(ap)
flt32bfmt(sb, fltparams(ap, params), val)
| `Tyflt64:
var val : flt64 = vanext(ap)
flt64bfmt(sb, fltparams(ap, params), val)
| `Tyvalist:
sbputs(sb, "...")
/* compound types */
| `Typtr desc:
var val : void# = vanext(ap)
sbputs(sb, "0x")
intfmt(sb,
[.base=16, .padto=2*sizeof(void#), .padfill='0'],
false, (val : uint64), 64)
| `Tyslice desc:
match typedesc(desc)
| `Tybyte:
var val : byte[:] = vanext(ap)
strfmt(sb, val, ap, params)
| _:
subap = vaenter(ap)
fmtslice(sb, subap, params)
vabytes(ap)
;;
| `Tyfunc tc:
var val : intptr[2] = vanext(ap)
sbputs(sb, "func{")
intfmt(sb,
[.base=16, .padto=2*sizeof(void#), .padfill='0'],
false, (val[0] : uint64), 0)
sbputs(sb, ", ")
intfmt(sb,
[.base=16, .padto=2*sizeof(void#), .padfill='0'],
false, (val[1] : uint64), 0)
sbputs(sb, "}")
| `Tyarray (sz, desc):
subap = vaenter(ap)
sbputs(sb, "[")
while subap.tc.nelt != 0
fmtval(sb, vatype(&subap), &subap, [][:])
if subap.tc.nelt > 0
sbfmt(sb, ", ")
;;
;;
sbputs(sb, "]")
vabytes(ap)
/* aggregate types */
| `Tytuple tc:
subap = vaenter(ap)
sbfmt(sb, "(")
var extracomma = subap.tc.nelt == 1
while subap.tc.nelt != 0
fmtval(sb, vatype(&subap), &subap, [][:])
if subap.tc.nelt > 0
sbfmt(sb, ", ")
;;
;;
if extracomma
sbfmt(sb, ",")
;;
sbfmt(sb, ")")
vabytes(ap)
| `Tystruct nc:
subap = vaenter(ap)
sbfmt(sb, "[")
while subap.tc.nelt != 0
(subname, subenc) = ncpeek(&subap.tc)
sbfmt(sb, ".{}=", subname)
fmtval(sb, vatype(&subap), &subap, [][:])
if subap.tc.nelt > 0
sbfmt(sb, ", ")
;;
;;
sbfmt(sb, "]")
vabytes(ap)
| `Tyunion nc:
var tag : int32
inf = typeinfo(tcpeek(&ap.tc))
p = (ap.args : size)
p = (p + inf.align - 1) & ~(inf.align - 1)
tag = (p : int32#)#
subap = vaenterunion(ap, tag)
for var i = 0; i < tag; i++
ncnext(&nc)
;;
(subname, subenc) = ncnext(&nc)
sbfmt(sb, "`{}", subname)
match typedesc(subenc)
| `Tynone:
| _:
sbputc(sb, ' ')
fmtval(sb, subenc, &subap, [][:])
;;
vabytes(ap)
| `Tyname (name, desc):
subap = vaenter(ap)
fmtval(sb, desc, &subap, params)
vabytes(ap)
;;
}
const fmtslice = {sb, subap, params
var join, joined
join = ", "
joined = false
for p : params
match p
| ("j", j):
joined = true
join = j
| (opt, arg):
std.write(2, "fmt: \0")
std.write(2, opt)
std.write(2, "\0arg: ")
std.write(2, arg)
std.die("unreacahable")
;;
;;
if !joined
sbputs(sb, "[")
;;
while subap.tc.nelt != 0
fmtval(sb, vatype(&subap), &subap, [][:])
if subap.tc.nelt > 0
sbputs(sb, join)
;;
;;
if !joined
sbputs(sb, "]")
;;
}
const fltparams = {ap, params
var fp : fltparams
fp = [
.mode = MNormal,
.cutoff = 0,
.scientific = false,
.padfill = ' ',
.padto = 0,
]
for p : params
match p
| ("e", ""): fp.scientific = true
| ("w", wid):
if eq(wid, "?")
fp.padto = pullint(ap, "fmt: width = ? must be integer")
else
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)
std.write(2, "arg: ")
std.write(2, arg)
std.die("\nunreachable\n")
;;
;;
iassert(fp.padto >= 0, "pad must be >= 0")
-> fp
}
const intparams = {ap, params
var ip : intparams
ip = [
.base = 10,
.padfill = ' ',
.padto = 0
]
for p : params
match p
| ("b", bas): ip.base = getint(bas, "fmt: base must be integer")
| ("x", ""): ip.base = 16
| ("w", wid):
if eq(wid, "?")
ip.padto = pullint(ap, "fmt: width = ? must be integer")
else
ip.padto = getint(wid, "fmt: width must be integer")
;;
| ("p", pad): ip.padfill = decode(pad)
| (opt, arg):
std.write(2, "fmt: ")
std.write(2, opt)
std.write(2, "arg: ")
std.write(2, arg)
std.die("\nunreachable\n")
;;
;;
iassert(ip.padto >= 0, "pad must be >= 0")
-> ip
}
const strfmt = {sb, str, ap, params
var w, p, i, raw, esc
p = ' '
w = 0
raw = false
esc = false
for pp : params
match pp
| ("w", wid):
if eq(wid, "?")
w = pullint(ap, "fmt: width = ? must be integer")
else
w = getint(wid, "fmt: width must be integer")
;;
| ("p", pad): p = decode(pad)
| ("r", ""): raw = true
| ("e", ""): esc = true
| (opt, arg):
std.write(2, "fmt: ")
std.write(2, opt)
std.write(2, "arg: ")
std.write(2, arg)
std.die("unreachable\n")
;;
;;
iassert(p >= 0, "pad must be >= 0")
if raw
for b : str
if esc
sbputs(sb, "\\x")
;;
intfmt(sb, [.padto=2, .padfill='0', .base=16], false, (b : uint64), 8)
;;
elif esc
for b : str
if isprint(b)
sbputb(sb, b)
else
match (b : char)
| '\n': sbputs(sb, "\\n")
| '\r': sbputs(sb, "\\r")
| '\t': sbputs(sb, "\\t")
| '\b': sbputs(sb, "\\b")
| '\"': sbputs(sb, "\\\"")
| '\'': sbputs(sb, "\\\'")
| '\\': sbputs(sb, "\\\\")
| '\0': sbputs(sb, "\\0")
| _:
sbputs(sb, "\\x")
intfmt(sb, [.padto=2, .padfill='0', .base=16], false, (b : uint64), 8)
;;
;;
;;
else
for i = 0; i < w - strcellwidth(str); i++
sbputc(sb, p)
;;
sbputs(sb, str)
;;
}
const isprint = {b
-> b >= (' ' : byte) && b < ('~' : byte)
}
/* would use std.get(), but that's a dependency loop */
const getint = {s, msg
match std.intparse(s)
| `Some w: -> w;
| `None: die(msg)
;;
}
const pullint = {ap, msg
if ap.tc.nelt < 1
die("expected argument where none was provided")
;;
match typedesc(vatype(ap))
| `Tyint8:
var val : int8 = vanext(ap)
-> val < 0 ? 0 : (val : size)
| `Tyint16:
var val : int16 = vanext(ap)
-> val < 0 ? 0 : (val : size)
| `Tyint:
var val : int = vanext(ap)
-> val < 0 ? 0 : (val : size)
| `Tyint32:
var val : int32 = vanext(ap)
-> val < 0 ? 0 : (val : size)
| `Tyint64:
var val : int64 = vanext(ap)
-> val < 0 ? 0 : (val : size)
| `Tyuint8:
var val : uint8 = vanext(ap)
-> (val : size)
| `Tyuint16:
var val : uint16 = vanext(ap)
-> (val : size)
| `Tyuint:
var val : uint = vanext(ap)
-> (val : size)
| `Tyuint32:
var val : uint32 = vanext(ap)
-> (val : size)
| `Tyuint64:
var val : uint64 = vanext(ap)
-> (val : size)
| `Tyname (_, desc):
/* This is primarily for handling std.size */
var subap = vaenter(ap)
var ret = pullint(&subap, msg)
vabytes(ap) /* Pull one element out to keep ap synchronized with subap */
-> ret
| _: die(msg)
;;
-> 0
}