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intcmp(1): rewrite in rust

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This commit is contained in:
dtb 2024-07-15 03:14:57 -06:00
parent 699893af89
commit 2f2270322a
Signed by: trinity
GPG Key ID: 34C0543BBB6AF81B
3 changed files with 11 additions and 92 deletions
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4
Makefile
View File

@ -109,8 +109,8 @@ build/bin/hru: src/hru.rs build rustlibs
.PHONY: intcmp
intcmp: build/bin/intcmp
build/bin/intcmp: src/intcmp.c build
$(CC) $(CFLAGS) -o $@ src/intcmp.c
build/bin/intcmp: src/intcmp.rs build rustlibs
$(RUSTC) $(RUSTFLAGS) $(RUSTLIBS) -o $@ src/intcmp.rs
.PHONY: mm
mm: build/bin/mm

82
src/intcmp.c
View File

@ -1,82 +0,0 @@
/*
* Copyright (c) 2023 DTB <trinity@trinity.moe>
* SPDX-License-Identifier: AGPL-3.0-or-later
*
* This program is free software: you can redistribute it and/or modify it under
* the terms of the GNU Affero General Public License as published by the Free
* Software Foundation, either version 3 of the License, or (at your option) any
* later version.
*
* 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 Affero General Public License for more
* details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see https://www.gnu.org/licenses/.
*/
#include <errno.h> /* errno */
#include <stdio.h> /* fprintf(3), stderr */
#include <stdlib.h> /* strtol(3), size_t, EXIT_FAILURE */
#include <unistd.h> /* getopt(3), optind */
#include <sysexits.h>
/* 0b00? */ /* Equal | -e | 0b001 | 1 */
#define EQUAL 0x01 /* Greater | -g | 0b010 | 2 */
/* 0b0?0 */ /* Greater or Equal | -ge | 0b011 | 3 */
#define GREATER 0x02 /* Less | -l | 0b100 | 4 */
/* 0b?00 */ /* Less or Equal | -le | 0b101 | 5 */
#define LESS 0x04 /* Inequal (Greater or Less) | -gl | 0b110 | 6 */
static char *program_name = "intcmp";
int main(int argc, char *argv[]){
int c;
size_t i;
unsigned char mode;
int r; /* reference integer */
mode = 0;
if(argc < 3)
goto usage;
while((c = getopt(argc, argv, "egl")) != -1)
switch(c){
case 'e': mode |= EQUAL; break;
case 'g': mode |= GREATER; break;
case 'l': mode |= LESS; break;
default: goto usage;
}
if(optind + 2 /* ref cmp */ > argc){
usage: fprintf(stderr,
"Usage: %s [-egl] integer integer...\n",
argv[0] == NULL ? program_name : argv[0]);
return EX_USAGE;
}
i = optind;
do{ r = c;
c = strtol(argv[i], &argv[i], 10);
if(*argv[i] != '\0' || errno != 0){
fprintf(stderr, "%s: argument #%d: Invalid integer\n",
argv[0], (int)i);
return EX_USAGE;
}
if(i == optind)
continue;
/* rule enforcement; if a mode isn't permitted and the numbers
* correspond to it, return 1 */
if( (!(mode & EQUAL) && r == c)
|| (!(mode & GREATER) && r > c)
|| (!(mode & LESS) && r < c))
return 1;
}while(++i < argc);
return 0;
}

17
src/intcmp.rs
View File

@ -16,18 +16,17 @@
* along with this program. If not, see https://www.gnu.org/licenses/.
*/
// /* 0b00? */ /* Equal | -e | 0b001 | 1 */
// #define EQUAL 0x01 /* Greater | -g | 0b010 | 2 */
// /* 0b0?0 */ /* Greater or Equal | -ge | 0b011 | 3 */
// #define GREATER 0x02 /* Less | -l | 0b100 | 4 */
// /* 0b?00 */ /* Less or Equal | -le | 0b101 | 5 */
// #define LESS 0x04 /* Inequal (Greater or Less) | -gl | 0b110 | 6 */
use std::{
env::args,
process::ExitCode
};
extern crate getopt;
use getopt::GetOpt;
extern crate sysexits;
use sysexits::EX_USAGE;
fn usage(s: &str) -> ExitCode {
eprintln!("Usage: {} [-egl] integer integer...", s);
ExitCode::from(EX_USAGE as u8)
@ -54,7 +53,7 @@ fn main() -> ExitCode {
if argv.len() - optind < 2 /* ref cmp */ { return usage(&argv[0]); }
let mut reference = None;
let mut reference: Option<usize> = None;
let mut cmpn: usize;
for arg in argv.iter().skip(optind) {
@ -72,6 +71,8 @@ fn main() -> ExitCode {
|| (!can_lt && refn < cmpn)
{ return ExitCode::FAILURE; }
}
reference = Some(cmpn);
}
ExitCode::SUCCESS