mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-01-31 11:37:35 +00:00
c776a32f75
This change might cause ABI breakages for /opt/cosmos. It's needed to help us better conform to header declaration practices.
72 lines
3 KiB
C
72 lines
3 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 2022 Justine Alexandra Roberts Tunney │
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│ │
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│ Permission to use, copy, modify, and/or distribute this software for │
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│ any purpose with or without fee is hereby granted, provided that the │
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│ above copyright notice and this permission notice appear in all copies. │
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│ │
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│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
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│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
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│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
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│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
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│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
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│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
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│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
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│ PERFORMANCE OF THIS SOFTWARE. │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/runtime/runtime.h"
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#include "libc/stdio/stdio.h"
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#include "libc/str/str.h"
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/**
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* @fileoverview scalable diff tool
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*
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* The normal `diff` command can take hours to diff text files that are
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* hundreds of megabytes in size. This tool is a useful replacement for
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* use cases like comparing a log of CPU registers.
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*/
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char line1[4096];
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char line2[4096];
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int main(int argc, char *argv[]) {
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int line;
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char *l1, *l2;
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FILE *f1, *f2;
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int differences;
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if (argc < 3) {
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fprintf(stderr, "usage: %s FILE1 FILE2\n", argv[0]);
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exit(1);
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}
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if (!(f1 = fopen(argv[1], "r"))) {
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perror(argv[1]);
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exit(1);
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}
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if (!(f2 = fopen(argv[2], "r"))) {
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perror(argv[2]);
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exit(1);
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}
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for (differences = 0, line = 1;; ++line) {
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l1 = fgets(line1, sizeof(line1), f1);
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l2 = fgets(line2, sizeof(line2), f2);
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if (!l1 && !l2) {
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exit(0);
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}
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if (l1) chomp(l1);
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if (l2) chomp(l2);
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if (!l1 || !l2) {
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printf("> %s\n", l1 ? l1 : "EOF");
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printf("< %s\n", l2 ? l2 : "EOF");
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exit(0);
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}
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if (!strcmp(l1, l2)) {
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printf("%s\n", l1);
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} else {
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printf("# line %d differed!\n", line);
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printf("> %s\n", l1);
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printf("< %s\n", l2);
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}
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}
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}
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