mirrors/cosmopolitan
1
0
Fork 0
mirror of https://github.com/jart/cosmopolitan.git synced 2025-05-28 00:02:28 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions 1

Initial import

Browse source
This commit is contained in:
Justine Tunney 2020-06-15 07:18:57 -07:00
commit c91b3c5006
14915 changed files with 590219 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

85
tool/viz/fold.c Normal file
View file

@ -0,0 +1,85 @@
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
╞══════════════════════════════════════════════════════════════════════════════╡
│ Copyright 2020 Justine Alexandra Roberts Tunney │
│ │
│ This program is free software; you can redistribute it and/or modify │
│ it under the terms of the GNU General Public License as published by │
│ the Free Software Foundation; version 2 of the License. │
│ │
│ This program is distributed in the hope that it will be useful, but │
│ WITHOUT ANY WARRANTY; without even the implied warranty of │
│ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU │
│ General Public License for more details. │
│ │
│ You should have received a copy of the GNU General Public License │
│ along with this program; if not, write to the Free Software │
│ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA │
│ 02110-1301 USA │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/bits/safemacros.h"
#include "libc/conv/conv.h"
#include "libc/errno.h"
#include "libc/runtime/runtime.h"
#include "libc/stdio/stdio.h"
#include "libc/str/str.h"
#include "libc/sysv/consts/ex.h"
#include "libc/sysv/consts/exit.h"
#include "third_party/getopt/getopt.h"
int column_;
noreturn void usage(int rc, FILE *f) {
fputs("Usage: ", f);
fputs(program_invocation_name, f);
fputs(" [-w COLS] [FILE...]\n", f);
exit(rc);
}
void getopts(int argc, char *argv[]) {
int opt;
while ((opt = getopt(argc, argv, "?hw:")) != -1) {
switch (opt) {
case 'w':
column_ = strtol(optarg, NULL, 0);
break;
case '?':
case 'h':
usage(EXIT_SUCCESS, stdout);
default:
usage(EX_USAGE, stderr);
}
}
if (column_ <= 0) {
column_ = 64;
}
}
void fold(FILE *fin, FILE *fout) {
unsigned column = 0;
for (;;) {
wint_t wc = fgetwc(fin);
if (wc != -1) {
fputwc(wc, fout);
if (wc == '\n') {
column = 0;
} else if (++column == column_) {
fputc('\n', fout);
column = 0;
}
} else {
if (feof(fin)) {
return;
} else {
fprintf(stderr, "%s: %d\n", "fgetwc", errno);
exit(1);
}
}
}
}
int main(int argc, char *argv[]) {
getopts(argc, argv);
fold(stdin, stdout);
return 0;
}