cosmopolitan/libc/stdio/printf.c
Jōshin e16a7d8f3b
flip et / noet in modelines
`et` means `expandtab`.

```sh
rg 'vi: .* :vi' -l -0 | \
  xargs -0 sed -i '' 's/vi: \(.*\) et\(.*\)  :vi/vi: \1 xoet\2:vi/'
rg 'vi: .*  :vi' -l -0 | \
  xargs -0 sed -i '' 's/vi: \(.*\)noet\(.*\):vi/vi: \1et\2  :vi/'
rg 'vi: .*  :vi' -l -0 | \
  xargs -0 sed -i '' 's/vi: \(.*\)xoet\(.*\):vi/vi: \1noet\2:vi/'
```
2023-12-07 22:17:11 -05:00

68 lines
3.7 KiB
C

/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
│ vi: set et ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi │
╞══════════════════════════════════════════════════════════════════════════════╡
│ Copyright 2020 Justine Alexandra Roberts Tunney │
│ │
│ Permission to use, copy, modify, and/or distribute this software for │
│ any purpose with or without fee is hereby granted, provided that the │
│ above copyright notice and this permission notice appear in all copies. │
│ │
│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
│ PERFORMANCE OF THIS SOFTWARE. │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/stdio/stdio.h"
/**
* Formats and writes text to stdout.
*
* Cosmopolitan supports most of the standard formatting behaviors
* described by `man 3 printf`, in addition to the following
*
* - `%jjd`, `%jjx`, etc. are {,u}int128_t (cosmopolitan only)
*
* - `%'d` or `%,d` may be used to insert thousands separators. The prior is
* consistent with C; the latter is consistent with Python.
*
* - `%m` inserts strerror(errno) into the formatted output. This is
* consistent with glibc, musl, and uclibc.
*
* - `%hs` converts UTF-16/UCS-2 → UTF-8, which can be helpful on Windows.
* Formatting (e.g. %-10hs) will use monospace display width rather
* than string length or codepoint count.
*
* - `%ls` (or `%Ls`) converts UTF-32 → UTF-8. Formatting (e.g. %-10ls)
* will use monospace display width rather than string length.
*
* - The `%#s` and `%#c` alternate forms display values using the
* standard IBM standard 256-letter alphabet. Using `%#.*s` to specify
* length will allow true binary (i.e. with NULs) to be formatted.
*
* - The `%'s` and `%'c` alternate forms are Cosmopolitan extensions for
* escaping string literals for C/C++ and Python. The outer quotation
* marks can be added automatically using ``%`s``. If constexpr format
* strings are used, we can avoid linking cescapec() too.
*
* - The backtick modifier (``%`s`` and ``%`c``) and repr() directive
* (`%r`) both ask the formatting machine to represent values as real
* code rather than using arbitrary traditions for displaying values.
* This means it implies the quoting modifier, wraps the value with
* {,u,L}['"] quotes, displays NULL as "NULL" rather than "(null)".
*
* @see __fmt() for intuitive reference documentation
* @see {,v}{,s{,n},{,{,x}as},f,d}printf
*/
int printf(const char* fmt, ...) {
int rc;
va_list va;
va_start(va, fmt);
rc = vfprintf(stdout, fmt, va);
va_end(va);
return rc;
}