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Diffstat (limited to 'uuencode.c')
| -rw-r--r-- | uuencode.c | 180 |
1 files changed, 0 insertions, 180 deletions
diff --git a/uuencode.c b/uuencode.c deleted file mode 100644 index fc03740..0000000 --- a/uuencode.c +++ /dev/null @@ -1,180 +0,0 @@ -/* vi: set sw=4 ts=4: */ -/* - * Copyright (C) 2000 by Glenn McGrath - * - * based on the function base64_encode from http.c in wget v1.6 - * Copyright (C) 1995, 1996, 1997, 1998, 2000 Free Software Foundation, Inc. - * - * 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; either version 2 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 Library 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. - */ -#include <getopt.h> -#include <stdio.h> -#include <stdlib.h> -#include <sys/types.h> -#include <sys/stat.h> -#include <unistd.h> -#include "busybox.h" - -/* Conversion table. for base 64 */ -static char tbl_base64[64] = { - 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', - 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', - 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', - 'Y', 'Z', 'a', 'b', 'c', 'd', 'e', 'f', - 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', - 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', - 'w', 'x', 'y', 'z', '0', '1', '2', '3', - '4', '5', '6', '7', '8', '9', '+', '/' -}; - -static char tbl_std[64] = { - '`', '!', '"', '#', '$', '%', '&', '\'', - '(', ')', '*', '+', ',', '-', '.', '/', - '0', '1', '2', '3', '4', '5', '6', '7', - '8', '9', ':', ';', '<', '=', '>', '?', - '@', 'A', 'B', 'C', 'D', 'E', 'F', 'G', - 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', - 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', - 'X', 'Y', 'Z', '[', '\\', ']', '^', '_' -}; - -/* - * Encode the string S of length LENGTH to base64 format and place it - * to STORE. STORE will be 0-terminated, and must point to a writable - * buffer of at least 1+BASE64_LENGTH(length) bytes. - * where BASE64_LENGTH(len) = (4 * ((LENGTH + 2) / 3)) - */ -static void uuencode (const char *s, const char *store, const int length, const char *tbl) -{ - int i; - unsigned char *p = (unsigned char *)store; - - /* Transform the 3x8 bits to 4x6 bits, as required by base64. */ - for (i = 0; i < length; i += 3) { - *p++ = tbl[s[0] >> 2]; - *p++ = tbl[((s[0] & 3) << 4) + (s[1] >> 4)]; - *p++ = tbl[((s[1] & 0xf) << 2) + (s[2] >> 6)]; - *p++ = tbl[s[2] & 0x3f]; - s += 3; - } - /* Pad the result if necessary... */ - if (i == length + 1) { - *(p - 1) = '='; - } - else if (i == length + 2) { - *(p - 1) = *(p - 2) = '='; - } - /* ...and zero-terminate it. */ - *p = '\0'; -} - -int uuencode_main(int argc, char **argv) -{ - const int src_buf_size = 60; // This *MUST* be a multiple of 3 - const int dst_buf_size = 4 * ((src_buf_size + 2) / 3); - RESERVE_BB_BUFFER(src_buf, src_buf_size + 1); - RESERVE_BB_BUFFER(dst_buf, dst_buf_size + 1); - struct stat stat_buf; - FILE *src_stream = stdin; - char *tbl = tbl_std; - size_t size; - mode_t mode; - int opt; - int column = 0; - int write_size = 0; - int remaining; - int buffer_offset = 0; - - while ((opt = getopt(argc, argv, "m")) != -1) { - switch (opt) { - case 'm': - tbl = tbl_base64; - break; - default: - show_usage(); - } - } - - switch (argc - optind) { - case 2: - src_stream = xfopen(argv[optind], "r"); - stat(argv[optind], &stat_buf); - mode = stat_buf.st_mode & (S_IRWXU | S_IRWXG | S_IRWXO); - if (src_stream == stdout) { - printf("NULL\n"); - } - break; - case 1: - mode = 0666 & ~umask(0666); - break; - default: - show_usage(); - } - - printf("begin%s %o %s", tbl == tbl_std ? "" : "-base64", mode, argv[argc - 1]); - - while ((size = fread(src_buf, 1, src_buf_size, src_stream)) > 0) { - /* Encode the buffer we just read in */ - uuencode(src_buf, dst_buf, size, tbl); - - /* Write the buffer to stdout, wrapping at 60 chars. - * This looks overly complex, but it gets tricky as - * the line has to continue to wrap correctly if we - * have to refill the buffer - * - * Improvments most welcome - */ - - /* Initialise values for the new buffer */ - remaining = 4 * ((size + 2) / 3); - buffer_offset = 0; - - /* Write the buffer to stdout, wrapping at 60 chars - * starting from the column the last buffer ran out - */ - do { - if (remaining > (60 - column)) { - write_size = 60 - column; - } - else if (remaining < 60) { - write_size = remaining; - } else { - write_size = 60; - } - - /* Setup a new row if required */ - if (column == 0) { - putchar('\n'); - if (tbl == tbl_std) { - putchar('M'); - } - } - /* Write to the 60th column */ - if (fwrite(&dst_buf[buffer_offset], 1, write_size, stdout) != write_size) { - perror("Couldnt finish writing"); - } - /* Update variables based on last write */ - buffer_offset += write_size; - remaining -= write_size; - column += write_size; - if (column % 60 == 0) { - column = 0; - } - } while (remaining > 0); - } - printf(tbl == tbl_std ? "\n`\nend\n" : "\n====\n"); - - return(EXIT_SUCCESS); -} |