83 lines
3.4 KiB
C
83 lines
3.4 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 2020 Justine Alexandra Roberts Tunney │
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│ │
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│ This program is free software; you can redistribute it and/or modify │
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│ it under the terms of the GNU General Public License as published by │
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│ the Free Software Foundation; version 2 of the License. │
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│ │
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│ This program is distributed in the hope that it will be useful, but │
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│ WITHOUT ANY WARRANTY; without even the implied warranty of │
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│ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU │
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│ General Public License for more details. │
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│ │
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│ You should have received a copy of the GNU General Public License │
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│ along with this program; if not, write to the Free Software │
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│ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA │
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│ 02110-1301 USA │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/conv/conv.h"
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#include "libc/limits.h"
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#include "libc/macros.h"
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#include "libc/runtime/gc.h"
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#include "libc/stdio/stdio.h"
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#include "libc/str/str.h"
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#include "libc/x/x.h"
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float b32;
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double b64;
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long double b80;
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uint32_t u32;
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uint64_t u64;
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intmax_t x;
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void int2float(const char *s) {
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x = strtoimax(s, NULL, 0);
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if ((0 <= x && x <= UINT32_MAX) && !startswith(s, "-") &&
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(!endswith(s, "l") && !endswith(s, "L"))) {
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u32 = x;
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memcpy(&b32, &u32, 4);
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s = gc(xdtoa(b32));
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if (!strchr(s, '.')) s = gc(xasprintf("%s.", s));
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s = gc(xasprintf("%sf", s));
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puts(s);
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} else if ((0 <= x && x <= UINT64_MAX) && !startswith(s, "-")) {
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u64 = x;
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memcpy(&b64, &u64, 8);
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s = gc(xdtoa(b64));
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if (!strchr(s, '.')) s = gc(xasprintf("%s.", s));
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puts(s);
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} else if ((INT32_MIN <= x && x <= 0) &&
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(!endswith(s, "l") && !endswith(s, "L"))) {
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u32 = ABS(x);
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memcpy(&b32, &u32, 4);
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b32 = -b32;
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s = gc(xdtoa(b32));
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if (!strchr(s, '.')) s = gc(xasprintf("%s.", s));
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s = gc(xasprintf("%sf", s));
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puts(s);
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} else if (INT64_MIN <= x && x <= 0) {
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u64 = ABS(x);
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memcpy(&b64, &u64, 8);
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b64 = -b64;
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s = gc(xdtoa(b64));
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if (!strchr(s, '.')) s = gc(xasprintf("%s.", s));
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puts(s);
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} else {
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memcpy(&b80, &x, 16);
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s = gc(xdtoa(b80));
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if (!strchr(s, '.')) s = gc(xasprintf("%s.", s));
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s = gc(xasprintf("%sL", s));
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puts(s);
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}
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}
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int main(int argc, char *argv[]) {
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int i;
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for (i = 1; i < argc; ++i) {
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int2float(argv[i]);
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}
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return 0;
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}
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