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* sprintf.c (rb_str_format): support %a format. [ruby-dev:40650]

Browse source 
* missing/vsnprintf.c (BSD_vfprintf): ditto.

* missing/vsnprintf.c (cvt): ditto.

* util.c (BSD__hdtoa): added.  This is 2-clause BSDL licensed
  by David Schultz and from FreeBSD.

* LEGAL: add about hdtoa() in util.c.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@27141 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
naruse 2010-04-01 04:32:57 +00:00
parent 4d399f12d4
commit 12b2e16e21
6 changed files with 242 additions and 10 deletions
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13
ChangeLog
View file

@ -1,3 +1,16 @@
Thu Apr 1 13:30:12 2010 NARUSE, Yui <naruse@ruby-lang.org>
* sprintf.c (rb_str_format): support %a format. [ruby-dev:40650]
* missing/vsnprintf.c (BSD_vfprintf): ditto.
* missing/vsnprintf.c (cvt): ditto.
* util.c (BSD__hdtoa): added. This is 2-clause BSDL licensed
by David Schultz and from FreeBSD.
* LEGAL: add about hdtoa() in util.c.
Thu Apr 1 13:24:12 2010 NARUSE, Yui <naruse@ruby-lang.org>
* object.c (rb_cstr_to_dbl): return 0.0 if hexadecimal and

26
LEGAL
View file

@ -123,6 +123,32 @@ win32/win32.[ch]:
You may distribute under the terms of either the GNU General Public
License or the Artistic License, as specified in the perl README file.
util.c (partly):
Copyright (c) 2004-2008 David Schultz <das@FreeBSD.ORG>
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
1. Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
SUCH DAMAGE.
random.c
This file is under the new-style BSD license.

39
missing/vsnprintf.c
View file

@ -559,7 +559,7 @@ BSD_vfprintf(FILE *fp, const char *fmt0, va_list ap)
struct __suio uio; /* output information: summary */
struct __siov iov[NIOV];/* ... and individual io vectors */
char buf[BUF]; /* space for %c, %[diouxX], %[eEfgG] */
char ox[2]; /* space for 0x hex-prefix */
char ox[4]; /* space for 0x hex-prefix, hexadecimal's 1. */
char *const ebuf = buf + sizeof(buf);
#if SIZEOF_LONG > SIZEOF_INT
long ln;
@ -784,6 +784,11 @@ reswitch: switch (ch) {
base = 10;
goto number;
#ifdef FLOATING_POINT
case 'a':
case 'A':
if (prec >= 0)
prec++;
goto fp_begin;
case 'e': /* anomalous precision */
case 'E':
if (prec != 0)
@ -822,7 +827,12 @@ fp_begin: _double = va_arg(ap, double);
else
ch = 'g';
}
if (ch <= 'e') { /* 'e' or 'E' fmt */
if (ch == 'a' || ch == 'A') {
--expt;
expsize = exponent(expstr, expt, ch + 'p' - 'a');
size = expsize + ndig;
}
else if (ch <= 'e') { /* 'e' or 'E' fmt */
--expt;
expsize = exponent(expstr, expt, ch);
size = expsize + ndig;
@ -1048,7 +1058,20 @@ long_len:
if ((flags & FPT) == 0) {
PRINT(cp, fieldsz);
} else { /* glue together f_p fragments */
if (ch >= 'f') { /* 'f' or 'g' */
if (ch == 'a' || ch == 'A') {
ox[0] = '0';
ox[1] = ch + ('x' - 'a');
PRINT(ox, 2);
if (ndig > 1 || flags & ALT) {
ox[2] = *cp++;
ox[3] = '.';
PRINT(ox+2, 2);
PRINT(cp, ndig-1);
} else /* XpYYY */
PRINT(cp, 1);
PRINT(expstr, expsize);
}
else if (ch >= 'f') { /* 'f' or 'g' */
if (_double == 0) {
/* kludge for __dtoa irregularity */
if (ndig <= 1 &&
@ -1112,6 +1135,7 @@ error:
#ifdef FLOATING_POINT
extern char *BSD__dtoa __P((double, int, int, int *, int *, char **));
extern char *BSD__hdtoa(double, const char *, int, int *, int *, char **);
static char *
cvt(value, ndigits, flags, sign, decpt, ch, length, buf)
@ -1135,7 +1159,14 @@ cvt(value, ndigits, flags, sign, decpt, ch, length, buf)
} else {
*sign = '\000';
}
if (ch == 'a' || ch =='A') {
digits = BSD__hdtoa(value,
ch == 'a' ? "0123456789abcdef" : "0123456789ABCDEF",
ndigits, decpt, &dsgn, &rve);
}
else {
digits = BSD__dtoa(value, mode, ndigits, decpt, &dsgn, &rve);
}
memcpy(buf, digits, rve - digits);
xfree(digits);
rve = buf + (rve - digits);
@ -1181,7 +1212,7 @@ exponent(p0, exp, fmtch)
for (; t < expbuf + MAXEXP; *p++ = *t++);
}
else {
*p++ = '0';
if (fmtch & 15) *p++ = '0'; /* other than p or P */
*p++ = to_char(exp);
}
return (int)(p - p0);

16
sprintf.c
View file

@ -227,6 +227,10 @@ get_hash(volatile VALUE *hash, int argc, const VALUE *argv)
* | equal to the precision, or in dd.dddd form otherwise.
* | The precision specifies the number of significant digits.
* G | Equivalent to `g', but use an uppercase `E' in exponent form.
* a | Convert floating point argument as [-]0xh.hhhhp[+-]dd,
* | which is consisted from optional sign, "0x", fraction part
* | as hexadecimal, "p", and exponential part as decimal.
* A | Equivalent to `a', but use uppercase `X' and `P'.
*
* Field | Other Format
* ------+--------------------------------------------------------------
@ -244,7 +248,7 @@ get_hash(volatile VALUE *hash, int argc, const VALUE *argv)
* Flag | Applies to | Meaning
* ---------+---------------+-----------------------------------------
* space | bBdiouxX | Leave a space at the start of
* | eEfgG | non-negative numbers.
* | aAeEfgG | non-negative numbers.
* | (numeric fmt) | For `o', `x', `X', `b' and `B', use
* | | a minus sign with absolute value for
* | | negative values.
@ -255,19 +259,19 @@ get_hash(volatile VALUE *hash, int argc, const VALUE *argv)
* | | sprintf string.
* ---------+---------------+-----------------------------------------
* # | bBoxX | Use an alternative format.
* | eEfgG | For the conversions `o', increase the precision
* | aAeEfgG | For the conversions `o', increase the precision
* | | until the first digit will be `0' if
* | | it is not formatted as complements.
* | | For the conversions `x', `X', `b' and `B'
* | | on non-zero, prefix the result with ``0x'',
* | | ``0X'', ``0b'' and ``0B'', respectively.
* | | For `e', `E', `f', `g', and 'G',
* | | For `a', `A', `e', `E', `f', `g', and 'G',
* | | force a decimal point to be added,
* | | even if no digits follow.
* | | For `g' and 'G', do not remove trailing zeros.
* ---------+---------------+-----------------------------------------
* + | bBdiouxX | Add a leading plus sign to non-negative
* | eEfgG | numbers.
* | aAeEfgG | numbers.
* | (numeric fmt) | For `o', `x', `X', `b' and `B', use
* | | a minus sign with absolute value for
* | | negative values.
@ -275,7 +279,7 @@ get_hash(volatile VALUE *hash, int argc, const VALUE *argv)
* - | all | Left-justify the result of this conversion.
* ---------+---------------+-----------------------------------------
* 0 (zero) | bBdiouxX | Pad with zeros, not spaces.
* | eEfgG | For `o', `x', `X', `b' and `B', radix-1
* | aAeEfgG | For `o', `x', `X', `b' and `B', radix-1
* | (numeric fmt) | is used for negative numbers formatted as
* | | complements.
* ---------+---------------+-----------------------------------------
@ -983,6 +987,8 @@ rb_str_format(int argc, const VALUE *argv, VALUE fmt)
case 'G':
case 'e':
case 'E':
case 'a':
case 'A':
{
VALUE val = GETARG();
double fval;

13
test/ruby/test_sprintf.rb
View file

@ -191,6 +191,19 @@ class TestSprintf < Test::Unit::TestCase
assert_equal(" Inf", sprintf("% 0e", 1.0/0.0), "moved from btest/knownbug")
end
def test_float_hex
assert_equal("-0x0p+0", sprintf("%a", -0.0))
assert_equal("0x0p+0", sprintf("%a", 0.0))
assert_equal("0x1p-1", sprintf("%a", 0.5))
assert_equal("0x1p+0", sprintf("%a", 1.0))
assert_equal("0x1p+1", sprintf("%a", 2.0))
assert_equal("0x1.193ea7aad030ap+0", sprintf("%a", Math.log(3)))
assert_equal("0X1.193EA7AAD030AP+0", sprintf("%A", Math.log(3)))
assert_equal("0x1p+10", sprintf("%a", 1024))
assert_equal("0x1.23456p+789", sprintf("%a", 3.704450999893983e+237))
assert_equal("0x1p-1074", sprintf("%a", 4.9e-324))
end
BSIZ = 120
def test_skip

143
util.c
View file

@ -3857,6 +3857,149 @@ ruby_each_words(const char *str, void (*func)(const char*, int, void*), void *ar
}
}
/*-
* Copyright (c) 2004-2008 David Schultz <das@FreeBSD.ORG>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#define DBL_MANH_SIZE 20
#define DBL_MANL_SIZE 32
#define INFSTR "Infinity"
#define NANSTR "NaN"
#define DBL_ADJ (DBL_MAX_EXP - 2)
#define SIGFIGS ((DBL_MANT_DIG + 3) / 4 + 1)
#define dexp_get(u) ((int)(word0(u) >> Exp_shift) & ~Exp_msk1)
#define dexp_set(u,v) (word0(u) = (((int)(word0(u)) & ~Exp_mask) | (v << Exp_shift)))
#define dmanh_get(u) ((int)(word0(u) & Frac_mask))
#define dmanl_get(u) ((int)word1(u))
/*
* This procedure converts a double-precision number in IEEE format
* into a string of hexadecimal digits and an exponent of 2. Its
* behavior is bug-for-bug compatible with dtoa() in mode 2, with the
* following exceptions:
*
* - An ndigits < 0 causes it to use as many digits as necessary to
* represent the number exactly.
* - The additional xdigs argument should point to either the string
* "0123456789ABCDEF" or the string "0123456789abcdef", depending on
* which case is desired.
* - This routine does not repeat dtoa's mistake of setting decpt
* to 9999 in the case of an infinity or NaN. INT_MAX is used
* for this purpose instead.
*
* Note that the C99 standard does not specify what the leading digit
* should be for non-zero numbers. For instance, 0x1.3p3 is the same
* as 0x2.6p2 is the same as 0x4.cp3. This implementation always makes
* the leading digit a 1. This ensures that the exponent printed is the
* actual base-2 exponent, i.e., ilogb(d).
*
* Inputs: d, xdigs, ndigits
* Outputs: decpt, sign, rve
*/
char *
BSD__hdtoa(double d, const char *xdigs, int ndigits, int *decpt, int *sign,
char **rve)
{
U u;
char *s, *s0;
int bufsize;
uint32_t manh, manl;
u.d = d;
if (word0(u) & Sign_bit) {
/* set sign for everything, including 0's and NaNs */
*sign = 1;
word0(u) &= ~Sign_bit; /* clear sign bit */
}
else
*sign = 0;
switch (fpclassify(d)) {
case FP_NORMAL:
*decpt = dexp_get(u) - DBL_ADJ;
break;
case FP_ZERO:
*decpt = 1;
return (nrv_alloc("0", rve, 1));
case FP_SUBNORMAL:
u.d *= 5.363123171977039e+154 /* 0x1p514 */;
*decpt = dexp_get(u) - (514 + DBL_ADJ);
break;
case FP_INFINITE:
*decpt = INT_MAX;
return (nrv_alloc(INFSTR, rve, sizeof(INFSTR) - 1));
default: /* FP_NAN or unrecognized */
*decpt = INT_MAX;
return (nrv_alloc(NANSTR, rve, sizeof(NANSTR) - 1));
}
/* FP_NORMAL or FP_SUBNORMAL */
if (ndigits == 0) /* dtoa() compatibility */
ndigits = 1;
/*
* If ndigits < 0, we are expected to auto-size, so we allocate
* enough space for all the digits.
*/
bufsize = (ndigits > 0) ? ndigits : SIGFIGS;
s0 = rv_alloc(bufsize);
/* Round to the desired number of digits. */
if (SIGFIGS > ndigits && ndigits > 0) {
float redux = 1.0;
int offset = 4 * ndigits + DBL_MAX_EXP - 4 - DBL_MANT_DIG;
dexp_set(u, offset);
u.d += redux;
u.d -= redux;
*decpt += dexp_get(u) - offset;
}
manh = dmanh_get(u);
manl = dmanl_get(u);
*s0 = '1';
for (s = s0 + 1; s < s0 + bufsize; s++) {
*s = xdigs[(manh >> (DBL_MANH_SIZE - 4)) & 0xf];
manh = (manh << 4) | (manl >> (DBL_MANL_SIZE - 4));
manl <<= 4;
}
/* If ndigits < 0, we are expected to auto-size the precision. */
if (ndigits < 0) {
for (ndigits = SIGFIGS; s0[ndigits - 1] == '0'; ndigits--)
;
}
s = s0 + ndigits;
*s = '\0';
if (rve != NULL)
*rve = s;
return (s0);
}
#ifdef __cplusplus
#if 0
{