mirror of
https://github.com/jart/cosmopolitan.git
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119 lines
4.1 KiB
C
119 lines
4.1 KiB
C
/*-*- mode:c;indent-tabs-mode:t;c-basic-offset:8;tab-width:8;coding:utf-8 -*-│
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│ vi: set noet ft=c ts=8 sw=8 fenc=utf-8 :vi │
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╚──────────────────────────────────────────────────────────────────────────────╝
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│ │
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│ Musl Libc │
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│ Copyright © 2005-2014 Rich Felker, et al. │
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│ │
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│ Permission is hereby granted, free of charge, to any person obtaining │
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│ a copy of this software and associated documentation files (the │
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│ "Software"), to deal in the Software without restriction, including │
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│ without limitation the rights to use, copy, modify, merge, publish, │
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│ distribute, sublicense, and/or sell copies of the Software, and to │
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│ permit persons to whom the Software is furnished to do so, subject to │
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│ the following conditions: │
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│ │
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│ The above copyright notice and this permission notice shall be │
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│ included in all copies or substantial portions of the Software. │
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│ │
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│ THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, │
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│ EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF │
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│ MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. │
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│ IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY │
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│ CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, │
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│ TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE │
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│ SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. │
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│ │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/errno.h"
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#include "libc/stdio/stdio.h"
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#include "libc/str/locale.h"
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#include "libc/str/str.h"
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#include "libc/ctype.h"
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#include "libc/thread/tls.h"
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__static_yoink("musl_libc_notice");
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static ssize_t vstrfmon_l(char *s, size_t n, locale_t loc, const char *fmt, va_list ap)
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{
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size_t l;
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double x;
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int left;
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int lp, rp, w, fw;
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char *s0=s;
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for (; n && *fmt; ) {
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if (*fmt != '%') {
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literal:
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*s++ = *fmt++;
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n--;
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continue;
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}
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fmt++;
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if (*fmt == '%') goto literal;
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left = 0;
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for (; ; fmt++) {
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switch (*fmt) {
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case '=':
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continue;
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case '^':
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continue;
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case '(':
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case '+':
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continue;
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case '!':
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continue;
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case '-':
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left = 1;
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continue;
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}
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break;
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}
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for (fw=0; isdigit(*fmt); fmt++)
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fw = 10*fw + (*fmt-'0');
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lp = 0;
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rp = 2;
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if (*fmt=='#') for (lp=0, fmt++; isdigit(*fmt); fmt++)
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lp = 10*lp + (*fmt-'0');
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if (*fmt=='.') for (rp=0, fmt++; isdigit(*fmt); fmt++)
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rp = 10*rp + (*fmt-'0');
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w = lp + 1 + rp;
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if (!left && fw>w) w = fw;
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x = va_arg(ap, double);
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l = snprintf(s, n, "%*.*f", w, rp, x);
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if (l >= n) {
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errno = E2BIG;
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return -1;
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}
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s += l;
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n -= l;
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}
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return s-s0;
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}
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ssize_t strfmon_l(char *restrict s, size_t n, locale_t loc, const char *restrict fmt, ...)
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{
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va_list ap;
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ssize_t ret;
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va_start(ap, fmt);
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ret = vstrfmon_l(s, n, loc, fmt, ap);
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va_end(ap);
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return ret;
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}
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ssize_t strfmon(char *restrict s, size_t n, const char *restrict fmt, ...)
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{
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va_list ap;
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ssize_t ret;
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va_start(ap, fmt);
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ret = vstrfmon_l(s, n, (locale_t)__get_tls()->tib_locale, fmt, ap);
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va_end(ap);
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return ret;
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}
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