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Clean up some code

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Justine Tunney 2022-12-11 14:30:50 -08:00
parent 531bfbd61f
commit ed161b240e
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GPG key ID: BE714B4575D6E328
17 changed files with 107 additions and 182 deletions
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tool/build/fastdiff.c Normal file
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/*-*- 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 2022 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/runtime/runtime.h"
#include "libc/stdio/stdio.h"
#include "libc/str/str.h"
/**
* @fileoverview scalable diff tool
*
* The normal `diff` command can take hours to diff text files that are
* hundreds of megabytes in size. This tool is a useful replacement for
* use cases like comparing a log of CPU registers.
*/
char line1[4096];
char line2[4096];
int main(int argc, char *argv[]) {
int line;
char *l1, *l2;
FILE *f1, *f2;
int differences;
if (argc < 3) {
fprintf(stderr, "usage: %s FILE1 FILE2\n", argv[0]);
exit(1);
}
if (!(f1 = fopen(argv[1], "r"))) {
perror(argv[1]);
exit(1);
}
if (!(f2 = fopen(argv[2], "r"))) {
perror(argv[2]);
exit(1);
}
for (differences = 0, line = 1;; ++line) {
l1 = fgets(line1, sizeof(line1), f1);
l2 = fgets(line2, sizeof(line2), f2);
if (!l1 && !l2) {
exit(0);
}
if (l1) _chomp(l1);
if (l2) _chomp(l2);
if (!l1 || !l2) {
printf("> %s\n", l1 ? l1 : "EOF");
printf("< %s\n", l2 ? l2 : "EOF");
exit(0);
}
if (!strcmp(l1, l2)) {
printf("%s\n", l1);
} else {
printf("# line %d differed!\n", line);
printf("> %s\n", l1);
printf("< %s\n", l2);
}
}
}