mirror of
https://github.com/jart/cosmopolitan.git
synced 2024-05-17 02:52:40 +00:00
2046c0d2ae
- Expand redbean UNIX module - Expand redbean documentation - Ensure Lua copyright is embedded in binary - Increase the PATH_MAX limit especially on NT - Use column major sorting for linenoise completions - Fix some suboptimalities in redbean's new UNIX API - Figured out right flags for Multics newline in raw mode
404 lines
12 KiB
C
404 lines
12 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/fmt.internal.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/intrin/nomultics.internal.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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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 (64-bit)
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* - `%jjd` int128_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 if floating point isn't used
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* @vforksafe if floating point isn't used
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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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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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char *s, *q, qchar;
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int d, w, n;
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int sign, prec, flags, width, 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, FormatInt64(ibuf, 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, FormatUint64(ibuf, 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, FormatInt64(ibuf, 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, FormatUint64(ibuf, 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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if (*format == 'j') {
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format++;
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signbit = sizeof(int128_t) * 8 - 1;
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}
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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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}
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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;
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/* 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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}
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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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// undocumented %r specifier
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// used for good carriage return
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// helps integrate loggers with repls
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if (!__replmode) {
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break;
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} else {
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p = "\r\e[K";
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goto FormatString;
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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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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;
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case 'n':
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__FMT_PUT('\n');
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break;
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case 'F':
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case 'f':
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case 'G':
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case 'g':
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case 'e':
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case 'E':
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case 'a':
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case 'A':
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if (!weaken(__fmt_dtoa)) {
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p = "?";
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prec = 0;
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flags &= ~(FLAGS_PRECISION | FLAGS_PLUS | FLAGS_SPACE);
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goto FormatString;
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}
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if (weaken(__fmt_dtoa)(out, arg, d, flags, prec, sign, width,
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longdouble, qchar, signbit, alphabet,
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va) == -1) {
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return -1;
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}
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break;
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case '%':
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__FMT_PUT('%');
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break;
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default:
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__FMT_PUT(format[-1]);
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break;
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}
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}
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return 0;
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}
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