mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-01-31 19:43:32 +00:00
398f0c16fb
This change makes SSL virtual hosting possible. You can now load
multiple certificates for multiple domains and redbean will just
figure out which one to use, even if you only have 1 ip address.
You can also use a jumbo certificate that lists all your domains
in the the subject alternative names.
This change also makes performance improvements to MbedTLS. Here
are some benchmarks vs. cc1920749e
BEFORE AFTER (microsecs)
suite_ssl.com 2512881 191738 13.11x faster
suite_pkparse.com 36291 3295 11.01x faster
suite_x509parse.com 854669 120293 7.10x faster
suite_pkwrite.com 6549 1265 5.18x faster
suite_ecdsa.com 53347 18778 2.84x faster
suite_pk.com 49051 18717 2.62x faster
suite_ecdh.com 19535 9502 2.06x faster
suite_shax.com 15848 7965 1.99x faster
suite_rsa.com 353257 184828 1.91x faster
suite_x509write.com 162646 85733 1.90x faster
suite_ecp.com 20503 11050 1.86x faster
suite_hmac_drbg.no_reseed.com 19528 11417 1.71x faster
suite_hmac_drbg.nopr.com 12460 8010 1.56x faster
suite_mpi.com 687124 442661 1.55x faster
suite_hmac_drbg.pr.com 11890 7752 1.53x faster
There aren't any special tricks to the performance imporvements.
It's mostly due to code cleanup, assembly and intel instructions
like mulx, adox, and adcx.
730 lines
20 KiB
C
730 lines
20 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2021 Justine Alexandra Roberts Tunney │
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│ │
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│ Permission to use, copy, modify, and/or distribute this software for │
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│ any purpose with or without fee is hereby granted, provided that the │
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│ above copyright notice and this permission notice appear in all copies. │
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│ │
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│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
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│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
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│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
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│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
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│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
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│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
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│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
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│ PERFORMANCE OF THIS SOFTWARE. │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/assert.h"
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#include "libc/bits/bits.h"
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#include "libc/bits/weaken.h"
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#include "libc/fmt/conv.h"
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#include "libc/fmt/fmt.h"
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#include "libc/fmt/fmts.h"
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#include "libc/fmt/internal.h"
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#include "libc/fmt/itoa.h"
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#include "libc/macros.internal.h"
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#include "libc/mem/mem.h"
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#include "libc/nexgen32e/bsr.h"
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#include "libc/runtime/internal.h"
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#include "libc/str/str.h"
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#include "libc/sysv/errfuns.h"
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#include "third_party/gdtoa/gdtoa.h"
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#define PUT(C) \
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do { \
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char Buf[1] = {C}; \
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if (out(Buf, arg, 1) == -1) { \
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return -1; \
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} \
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} while (0)
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static const char kSpecialFloats[2][2][4] = {{"INF", "inf"}, {"NAN", "nan"}};
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static int __fmt_atoi(const char **str) {
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int i;
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for (i = 0; '0' <= **str && **str <= '9'; ++*str) {
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i *= 10;
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i += **str - '0';
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}
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return i;
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}
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/**
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* Implements {,v}{,s{,n},{,{,x}as},f,d}printf domain-specific language.
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*
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* Type Specifiers
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*
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* - `%s` char * (thompson-pike unicode)
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* - `%ls` wchar_t * (32-bit unicode → thompson-pike unicode)
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* - `%hs` char16_t * (16-bit unicode → thompson-pike unicode)
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* - `%b` int (radix 2 binary)
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* - `%o` int (radix 8 octal)
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* - `%d` int (radix 10 decimal)
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* - `%x` int (radix 16 hexadecimal)
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* - `%X` int (radix 16 hexadecimal uppercase)
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* - `%p` pointer (48-bit hexadecimal)
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* - `%u` unsigned
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* - `%g` double (smart formatting)
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* - `%e` double (expo formatting)
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* - `%f` double (ugly formatting)
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* - `%a` double (hex formatting)
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* - `%Lg` long double
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*
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* Size Modifiers
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*
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* - `%hhd` char (8-bit)
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* - `%hd` short (16-bit)
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* - `%ld` long (64-bit)
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* - `%lu` unsigned long (64-bit)
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* - `%lx` unsigned long (64-bit hexadecimal)
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* - `%jd` intmax_t (128-bit)
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*
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* Width Modifiers
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*
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* - `%08d` fixed columns w/ zero leftpadding
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* - `%8d` fixed columns w/ space leftpadding
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* - `%*s` variable column string (thompson-pike)
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*
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* Precision Modifiers
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*
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* - `%.8s` supplied byte length (obeys nul terminator)
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* - `%.*s` supplied byte length argument (obeys nul terminator)
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* - ``%`.*s`` supplied byte length argument c escaped (ignores nul term)
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* - `%#.*s` supplied byte length argument visualized (ignores nul term)
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* - `%.*hs` supplied char16_t length argument (obeys nul terminator)
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* - `%.*ls` supplied wchar_t length argument (obeys nul terminator)
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*
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* Formatting Modifiers
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*
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* - `%,d` thousands separators
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* - `%'s` escaped c string literal
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* - ``%`c`` c escaped character
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* - ``%`'c`` c escaped character quoted
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* - ``%`s`` c escaped string
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* - ``%`'s`` c escaped string quoted
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* - ``%`s`` escaped double quoted c string literal
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* - ``%`c`` escaped double quoted c character literal
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* - `%+d` plus leftpad if positive (aligns w/ negatives)
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* - `% d` space leftpad if positive (aligns w/ negatives)
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* - `%#s` datum (radix 256 null-terminated ibm cp437)
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* - `%#x` int (radix 16 hexadecimal w/ 0x prefix if not zero)
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*
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* @note implementation detail of printf(), snprintf(), etc.
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* @see printf() for wordier documentation
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* @note netlib.org is so helpful
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* @asyncsignalsafe
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* @vforksafe
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*/
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hidden int __fmt(void *fn, void *arg, const char *format, va_list va) {
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union {
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double d;
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uint32_t u[2];
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uint64_t q;
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} pun;
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long ld;
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void *p;
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unsigned u;
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char ibuf[21];
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bool longdouble;
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long double ldbl;
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unsigned long lu;
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wchar_t charbuf[1];
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const char *alphabet;
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int (*out)(const char *, void *, size_t);
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unsigned char signbit, log2base;
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int c, d, k, w, n, i1, ui, bw, bex;
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char *s, *q, *se, qchar, special[8];
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int sgn, alt, sign, prec, prec1, flags, width, decpt, lasterr;
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lasterr = errno;
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out = fn ? fn : (void *)missingno;
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while (*format) {
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if (*format != '%') {
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for (n = 1; format[n]; ++n) {
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if (format[n] == '%') break;
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}
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if (out(format, arg, n) == -1) return -1;
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format += n;
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continue;
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}
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if (!IsTiny()) {
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if (format[1] == 's') { /* FAST PATH: PLAIN STRING */
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s = va_arg(va, char *);
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if (!s) s = "(null)";
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if (out(s, arg, strlen(s)) == -1) return -1;
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format += 2;
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continue;
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} else if (format[1] == 'd') { /* FAST PATH: PLAIN INTEGER */
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d = va_arg(va, int);
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if (out(ibuf, arg, int64toarray_radix10(d, ibuf)) == -1) return -1;
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format += 2;
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continue;
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} else if (format[1] == 'u') { /* FAST PATH: PLAIN UNSIGNED */
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u = va_arg(va, unsigned);
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if (out(ibuf, arg, uint64toarray_radix10(u, ibuf)) == -1) return -1;
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format += 2;
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continue;
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} else if (format[1] == 'x') { /* FAST PATH: PLAIN HEX */
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u = va_arg(va, unsigned);
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if (out(ibuf, arg, uint64toarray_radix16(u, ibuf)) == -1) return -1;
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format += 2;
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continue;
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} else if (format[1] == 'l' && format[2] == 'x') {
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lu = va_arg(va, unsigned long); /* FAST PATH: PLAIN LONG HEX */
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if (out(ibuf, arg, uint64toarray_radix16(lu, ibuf)) == -1) return -1;
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format += 3;
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continue;
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} else if (format[1] == 'l' && format[2] == 'd') {
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ld = va_arg(va, long); /* FAST PATH: PLAIN LONG */
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if (out(ibuf, arg, int64toarray_radix10(ld, ibuf)) == -1) return -1;
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format += 3;
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continue;
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} else if (format[1] == 'l' && format[2] == 'u') {
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lu = va_arg(va, unsigned long); /* FAST PATH: PLAIN UNSIGNED LONG */
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if (out(ibuf, arg, uint64toarray_radix10(lu, ibuf)) == -1) return -1;
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format += 3;
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continue;
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} else if (format[1] == '.' && format[2] == '*' && format[3] == 's') {
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n = va_arg(va, unsigned); /* FAST PATH: PRECISION STRING */
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s = va_arg(va, const char *);
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if (s) {
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n = strnlen(s, n);
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} else {
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s = "(null)";
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n = MIN(6, n);
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}
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if (out(s, arg, n) == -1) return -1;
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format += 4;
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continue;
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}
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}
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/* GENERAL PATH */
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format++;
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sign = 0;
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flags = 0;
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getflag:
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switch (*format++) {
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case '0':
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flags |= FLAGS_ZEROPAD;
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goto getflag;
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case '-':
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flags |= FLAGS_LEFT;
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goto getflag;
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case '+':
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sign = '+';
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flags |= FLAGS_PLUS;
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goto getflag;
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case ' ':
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sign = ' ';
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flags |= FLAGS_SPACE;
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goto getflag;
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case '#':
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flags |= FLAGS_HASH;
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goto getflag;
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case ',':
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flags |= FLAGS_GROUPING;
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goto getflag;
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case '`':
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flags |= FLAGS_REPR;
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/* fallthrough */
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case '\'':
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flags |= FLAGS_QUOTE;
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goto getflag;
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default:
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format--;
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break;
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}
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/* evaluate width field */
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width = 0;
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if (isdigit(*format)) {
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width = __fmt_atoi(&format);
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} else if (*format == '*') {
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w = va_arg(va, int);
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if (w < 0) {
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flags |= FLAGS_LEFT; /* reverse padding */
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width = -w;
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sign = '-';
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} else {
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width = w;
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}
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format++;
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}
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/* evaluate prec field */
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prec = 0;
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if (*format == '.') {
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flags |= FLAGS_PRECISION;
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format++;
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if (isdigit(*format)) {
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prec = __fmt_atoi(&format);
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} else if (*format == '*') {
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prec = va_arg(va, int);
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format++;
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}
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}
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if (prec < 0) {
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prec = 0;
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}
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/* evaluate length field */
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signbit = 31;
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longdouble = false;
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switch (*format) {
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case 'j': /* intmax_t */
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format++;
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signbit = sizeof(intmax_t) * 8 - 1;
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break;
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case 'l':
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if (format[1] == 'f' || format[1] == 'F') {
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format++;
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break;
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}
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if (format[1] == 'l') format++;
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/* fallthrough */
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|
case 't': /* ptrdiff_t */
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case 'z': /* size_t */
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|
case 'Z': /* size_t */
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format++;
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signbit = 63;
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break;
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case 'L': /* long double */
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format++;
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longdouble = true;
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break;
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case 'h':
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format++;
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if (*format == 'h') {
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format++;
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signbit = 7;
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} else {
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signbit = 15;
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|
}
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break;
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|
default:
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|
break;
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}
|
|
|
|
/* evaluate specifier */
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|
qchar = '"';
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|
log2base = 0;
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alphabet = "0123456789abcdefpx";
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switch ((d = *format++)) {
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case 'p':
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flags |= FLAGS_HASH;
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log2base = 4;
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signbit = 63;
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goto FormatNumber;
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case 'X':
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alphabet = "0123456789ABCDEFPX";
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/* fallthrough */
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case 'x':
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log2base = 4;
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goto FormatNumber;
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case 'b':
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log2base = 1;
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goto FormatNumber;
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case 'o':
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log2base = 3;
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goto FormatNumber;
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case 'd':
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|
case 'i':
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|
flags |= FLAGS_ISSIGNED;
|
|
/* fallthrough */
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|
case 'u': {
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|
flags &= ~FLAGS_HASH; /* no hash for dec format */
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FormatNumber:
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if (__fmt_ntoa(out, arg, va, signbit, log2base, prec, width, flags,
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alphabet) == -1) {
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return -1;
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|
}
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|
break;
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|
}
|
|
|
|
case 'c':
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|
prec = 1;
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flags |= FLAGS_PRECISION;
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qchar = '\'';
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p = charbuf;
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charbuf[0] = va_arg(va, int);
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goto FormatString;
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case 'm':
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p = weaken(strerror) ? weaken(strerror)(lasterr) : "?";
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signbit = 0;
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goto FormatString;
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|
|
case 'r':
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flags |= FLAGS_REPR;
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|
/* fallthrough */
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|
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|
case 'q':
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|
flags |= FLAGS_QUOTE;
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|
/* fallthrough */
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|
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|
case 's':
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|
p = va_arg(va, void *);
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FormatString:
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if (__fmt_stoa(out, arg, p, flags, prec, width, signbit, qchar) == -1) {
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return -1;
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|
}
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|
break;
|
|
|
|
case 'F':
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|
case 'f':
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|
if (!(flags & FLAGS_PRECISION)) prec = 6;
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if (longdouble) {
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pun.d = va_arg(va, long double);
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|
} else {
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|
pun.d = va_arg(va, double);
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}
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FormatDtoa:
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if (!weaken(__fmt_dtoa)) {
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p = "?";
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goto FormatThatThing;
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}
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s = weaken(__fmt_dtoa)(pun.d, 3, prec, &decpt, &sgn, &se);
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|
if (decpt == 9999) {
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|
Format9999:
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|
p = q = memset(special, 0, sizeof(special));
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|
if (sgn) {
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|
*q++ = '-';
|
|
} else if (flags & FLAGS_PLUS) {
|
|
*q++ = '+';
|
|
} else if (flags & FLAGS_SPACE) {
|
|
*q++ = ' ';
|
|
}
|
|
memcpy(q, kSpecialFloats[*s == 'N'][d >= 'a'], 4);
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FormatThatThing:
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prec = alt = 0;
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flags &= ~(FLAGS_PRECISION | FLAGS_PLUS | FLAGS_SPACE);
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goto FormatString;
|
|
}
|
|
FormatReal:
|
|
if (sgn) sign = '-';
|
|
if (prec > 0) width -= prec;
|
|
if (width > 0) {
|
|
if (sign) --width;
|
|
if (decpt <= 0) {
|
|
--width;
|
|
if (prec > 0) --width;
|
|
} else {
|
|
if (s == se) decpt = 1;
|
|
width -= decpt;
|
|
if (prec > 0 || alt) --width;
|
|
}
|
|
}
|
|
if (width > 0 && !(flags & FLAGS_LEFT)) {
|
|
if (flags & FLAGS_ZEROPAD) {
|
|
if (sign) PUT(sign);
|
|
sign = 0;
|
|
do
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|
PUT('0');
|
|
while (--width > 0);
|
|
} else {
|
|
do
|
|
PUT(' ');
|
|
while (--width > 0);
|
|
}
|
|
}
|
|
if (sign) PUT(sign);
|
|
if (decpt <= 0) {
|
|
PUT('0');
|
|
if (prec > 0 || alt) PUT('.');
|
|
while (decpt < 0) {
|
|
PUT('0');
|
|
prec--;
|
|
decpt++;
|
|
}
|
|
} else {
|
|
do {
|
|
if ((c = *s)) {
|
|
s++;
|
|
} else {
|
|
c = '0';
|
|
}
|
|
PUT(c);
|
|
} while (--decpt > 0);
|
|
if (prec > 0 || alt) PUT('.');
|
|
}
|
|
while (--prec >= 0) {
|
|
if ((c = *s)) {
|
|
s++;
|
|
} else {
|
|
c = '0';
|
|
}
|
|
PUT(c);
|
|
}
|
|
while (--width >= 0) {
|
|
PUT(' ');
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|
}
|
|
continue;
|
|
|
|
case 'G':
|
|
case 'g':
|
|
if (!(flags & FLAGS_PRECISION)) prec = 6;
|
|
if (longdouble) {
|
|
pun.d = va_arg(va, long double);
|
|
} else {
|
|
pun.d = va_arg(va, double);
|
|
}
|
|
if (prec < 0) prec = 0;
|
|
if (!weaken(__fmt_dtoa)) {
|
|
p = "?";
|
|
goto FormatThatThing;
|
|
}
|
|
s = weaken(__fmt_dtoa)(pun.d, prec ? 2 : 0, prec, &decpt, &sgn, &se);
|
|
if (decpt == 9999) goto Format9999;
|
|
c = se - s;
|
|
prec1 = prec;
|
|
if (!prec) {
|
|
prec = c;
|
|
prec1 = c + (s[1] || alt ? 5 : 4);
|
|
}
|
|
if (decpt > -4 && decpt <= prec1) {
|
|
if (alt) {
|
|
prec -= decpt;
|
|
} else {
|
|
prec = c - decpt;
|
|
}
|
|
if (prec < 0) prec = 0;
|
|
goto FormatReal;
|
|
}
|
|
d -= 2;
|
|
if (!alt && prec > c) prec = c;
|
|
--prec;
|
|
goto FormatExpo;
|
|
|
|
case 'e':
|
|
case 'E':
|
|
if (!(flags & FLAGS_PRECISION)) prec = 6;
|
|
if (longdouble) {
|
|
pun.d = va_arg(va, long double);
|
|
} else {
|
|
pun.d = va_arg(va, double);
|
|
}
|
|
if (prec < 0) prec = 0;
|
|
if (!weaken(__fmt_dtoa)) {
|
|
p = "?";
|
|
goto FormatThatThing;
|
|
}
|
|
s = weaken(__fmt_dtoa)(pun.d, 2, prec + 1, &decpt, &sgn, &se);
|
|
if (decpt == 9999) goto Format9999;
|
|
FormatExpo:
|
|
if (sgn) sign = '-';
|
|
if ((width -= prec + 5) > 0) {
|
|
if (sign) --width;
|
|
if (prec || alt) --width;
|
|
}
|
|
if ((c = --decpt) < 0) c = -c;
|
|
while (c >= 100) {
|
|
--width;
|
|
c /= 10;
|
|
}
|
|
if (width > 0 && !(flags & FLAGS_LEFT)) {
|
|
if (flags & FLAGS_ZEROPAD) {
|
|
if (sign) PUT(sign);
|
|
sign = 0;
|
|
do
|
|
PUT('0');
|
|
while (--width > 0);
|
|
} else {
|
|
do
|
|
PUT(' ');
|
|
while (--width > 0);
|
|
}
|
|
}
|
|
if (sign) PUT(sign);
|
|
PUT(*s++);
|
|
if (prec || alt) PUT('.');
|
|
while (--prec >= 0) {
|
|
if ((c = *s)) {
|
|
s++;
|
|
} else {
|
|
c = '0';
|
|
}
|
|
PUT(c);
|
|
}
|
|
PUT(d);
|
|
if (decpt < 0) {
|
|
PUT('-');
|
|
decpt = -decpt;
|
|
} else {
|
|
PUT('+');
|
|
}
|
|
for (c = 2, k = 10; 10 * k <= decpt; c++) k *= 10;
|
|
for (;;) {
|
|
i1 = decpt / k;
|
|
PUT(i1 + '0');
|
|
if (--c <= 0) break;
|
|
decpt -= i1 * k;
|
|
decpt *= 10;
|
|
}
|
|
while (--width >= 0) {
|
|
PUT(' ');
|
|
}
|
|
continue;
|
|
|
|
case 'a':
|
|
alphabet = "0123456789abcdefpx";
|
|
goto FormatBinary;
|
|
case 'A':
|
|
alphabet = "0123456789ABCDEFPX";
|
|
FormatBinary:
|
|
if (longdouble) {
|
|
pun.d = va_arg(va, long double);
|
|
} else {
|
|
pun.d = va_arg(va, double);
|
|
}
|
|
if ((pun.u[1] & 0x7ff00000) == 0x7ff00000) {
|
|
goto FormatDtoa;
|
|
}
|
|
if (pun.u[1] & 0x80000000) {
|
|
sign = '-';
|
|
pun.u[1] &= 0x7fffffff;
|
|
}
|
|
if (pun.d) {
|
|
c = '1';
|
|
bex = (pun.u[1] >> 20) - 1023;
|
|
pun.u[1] &= 0xfffff;
|
|
if (bex == -1023) {
|
|
++bex;
|
|
if (pun.u[1]) {
|
|
do {
|
|
--bex;
|
|
pun.u[1] <<= 1;
|
|
if (pun.u[0] & 0x80000000) pun.u[1] |= 1;
|
|
pun.u[0] <<= 1;
|
|
} while (pun.u[1] < 0x100000);
|
|
} else {
|
|
while (!(pun.u[0] & 0x80000000)) {
|
|
--bex;
|
|
pun.u[0] <<= 1;
|
|
}
|
|
bex -= 21;
|
|
pun.u[1] = pun.u[0] >> 11;
|
|
pun.u[0] <<= 21;
|
|
}
|
|
}
|
|
} else {
|
|
c = '0';
|
|
bex = 0;
|
|
}
|
|
if (flags & FLAGS_PRECISION) {
|
|
if (prec > 13) prec = 13;
|
|
if (pun.d && prec < 13) {
|
|
pun.u[1] |= 0x100000;
|
|
if (prec < 5) {
|
|
ui = 1u << ((5 - prec) * 4 - 1);
|
|
if (pun.u[1] & ui) {
|
|
if (pun.u[1] & ((ui - 1) | (ui << 1)) || pun.u[0]) {
|
|
pun.u[1] += ui;
|
|
BexCheck:
|
|
if (pun.u[1] & 0x200000) {
|
|
++bex;
|
|
pun.u[1] >>= 1;
|
|
}
|
|
}
|
|
}
|
|
} else if (prec == 5) {
|
|
if (pun.u[0] & 0x80000000) {
|
|
BumpIt:
|
|
++pun.u[1];
|
|
goto BexCheck;
|
|
}
|
|
} else {
|
|
i1 = (13 - prec) * 4;
|
|
ui = 1u << (i1 - 1);
|
|
if (pun.u[0] & ui && pun.u[0] & ((ui - 1) | (ui << 1))) {
|
|
pun.u[0] += ui;
|
|
if (!(pun.u[0] >> i1)) goto BumpIt;
|
|
}
|
|
}
|
|
}
|
|
} else {
|
|
if ((ui = pun.u[0])) {
|
|
ui = __builtin_ctz(ui);
|
|
prec = 6 + ((32 - ROUNDDOWN(ui, 4)) >> 2) - 1;
|
|
} else if ((ui = pun.u[1] & 0xfffff)) {
|
|
ui = __builtin_ctz(ui);
|
|
prec = (20 - ROUNDDOWN(ui, 4)) >> 2;
|
|
} else {
|
|
prec = 0;
|
|
}
|
|
}
|
|
bw = 1;
|
|
if (bex) {
|
|
if ((i1 = bex) < 0) i1 = -i1;
|
|
while (i1 >= 10) {
|
|
++bw;
|
|
i1 /= 10;
|
|
}
|
|
}
|
|
if (pun.u[1] & 0x80000000) {
|
|
pun.u[1] &= 0x7fffffff;
|
|
if (pun.d || sign) sign = '-';
|
|
}
|
|
if ((width -= bw + 5) > 0) {
|
|
if (sign) --width;
|
|
if (prec || alt) --width;
|
|
}
|
|
if (pun.q && prec > 0) {
|
|
width -= ROUNDUP(bsrl(pun.q) + 1, 4) >> 2;
|
|
}
|
|
if (width > 0 && !(flags & FLAGS_LEFT)) {
|
|
if (flags & FLAGS_ZEROPAD) {
|
|
if (sign) {
|
|
PUT(sign);
|
|
sign = 0;
|
|
}
|
|
do
|
|
PUT('0');
|
|
while (--width > 0);
|
|
} else {
|
|
do
|
|
PUT(' ');
|
|
while (--width > 0);
|
|
}
|
|
}
|
|
if (sign) PUT(sign);
|
|
PUT('0');
|
|
PUT(alphabet[17]);
|
|
PUT(c);
|
|
if (prec > 0 || alt) PUT('.');
|
|
while (prec-- > 0) {
|
|
PUT(alphabet[(pun.q >> 48) & 0xf]);
|
|
pun.q <<= 4;
|
|
}
|
|
PUT(alphabet[16]);
|
|
if (bex < 0) {
|
|
PUT('-');
|
|
bex = -bex;
|
|
} else {
|
|
PUT('+');
|
|
}
|
|
for (c = 1; 10 * c <= bex;) c *= 10;
|
|
for (;;) {
|
|
i1 = bex / c;
|
|
PUT('0' + i1);
|
|
if (!--bw) break;
|
|
bex -= i1 * c;
|
|
bex *= 10;
|
|
}
|
|
break;
|
|
|
|
case '%':
|
|
PUT('%');
|
|
break;
|
|
|
|
default:
|
|
PUT(format[-1]);
|
|
break;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|