The SPDX folks have obsoleted the BSD-2-Clause-FreeBSD identifier. Catch up to that fact and revert to their recommended match of BSD-2-Clause. Discussed with: pfg MFC After: 3 days Sponsored by: Netflix
199 lines
4.4 KiB
C
199 lines
4.4 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* Copyright (c) 2020 Baptiste Daroussin <bapt@FreeBSD.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <ctype.h>
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#include <stdbool.h>
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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extern int main_quotedprintable(int, char *[]);
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static int
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hexval(int c)
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{
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if ('0' <= c && c <= '9')
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return c - '0';
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return (10 + c - 'A');
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}
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static int
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decode_char(const char *s)
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{
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return (16 * hexval(toupper(s[1])) + hexval(toupper(s[2])));
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}
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static void
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decode_quoted_printable(const char *body, FILE *fpo)
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{
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while (*body != '\0') {
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switch (*body) {
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case '=':
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if (strlen(body) < 2) {
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fputc(*body, fpo);
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break;
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}
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if (body[1] == '\r' && body[2] == '\n') {
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body += 2;
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break;
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}
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if (body[1] == '\n') {
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body++;
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break;
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}
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if (strchr("0123456789ABCDEFabcdef", body[1]) == NULL) {
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fputc(*body, fpo);
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break;
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}
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if (strchr("0123456789ABCDEFabcdef", body[2]) == NULL) {
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fputc(*body, fpo);
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break;
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}
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fputc(decode_char(body), fpo);
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body += 2;
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break;
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default:
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fputc(*body, fpo);
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break;
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}
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body++;
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}
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}
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static void
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encode_quoted_printable(const char *body, FILE *fpo)
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{
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char prev;
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const char *end = body + strlen(body);
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size_t linelen = 0;
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while (*body != '\0') {
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if (linelen == 75) {
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fputs("=\r\n", fpo);
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linelen = 0;
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}
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if (!isascii(*body) ||
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*body == '=' ||
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(*body == '.' && body + 1 < end &&
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(body[1] == '\n' || body[1] == '\r'))) {
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fprintf(fpo, "=%02X", (unsigned char)*body);
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linelen += 2;
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prev = *body;
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} else if (*body < 33 && *body != '\n') {
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if ((*body == ' ' || *body == '\t') &&
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body + 1 < end &&
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(body[1] != '\n' && body[1] != '\r')) {
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fputc(*body, fpo);
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prev = *body;
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} else {
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fprintf(fpo, "=%02X", (unsigned char)*body);
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linelen += 2;
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prev = '_';
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}
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} else if (*body == '\n') {
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if (prev == ' ' || prev == '\t') {
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fputc('=', fpo);
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}
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fputc('\n', fpo);
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linelen = 0;
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prev = 0;
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} else {
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fputc(*body, fpo);
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prev = *body;
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}
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body++;
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linelen++;
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}
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}
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static void
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qp(FILE *fp, FILE *fpo, bool encode)
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{
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char *line = NULL;
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size_t linecap = 0;
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ssize_t linelen;
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void (*codec)(const char *line, FILE *f);
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codec = encode ? encode_quoted_printable : decode_quoted_printable ;
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while ((linelen = getline(&line, &linecap, fp)) > 0)
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codec(line, fpo);
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free(line);
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}
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static void
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usage(void)
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{
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fprintf(stderr,
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"usage: bintrans qp [-u] [-o outputfile] [file name]\n");
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}
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int
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main_quotedprintable(int argc, char *argv[])
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{
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int i;
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bool encode = true;
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FILE *fp = stdin;
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FILE *fpo = stdout;
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for (i = 1; i < argc; ++i) {
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if (argv[i][0] == '-') {
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switch (argv[i][1]) {
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case 'o':
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if (++i >= argc) {
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fprintf(stderr, "qp: -o requires a file name.\n");
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exit(EXIT_FAILURE);
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}
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fpo = fopen(argv[i], "w");
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if (fpo == NULL) {
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perror(argv[i]);
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exit(EXIT_FAILURE);
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}
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break;
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case 'u':
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encode = false;
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break;
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default:
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usage();
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exit(EXIT_FAILURE);
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}
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} else {
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fp = fopen(argv[i], "r");
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if (fp == NULL) {
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perror(argv[i]);
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exit(EXIT_FAILURE);
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}
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}
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}
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qp(fp, fpo, encode);
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return (EXIT_SUCCESS);
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}
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