diff options
Diffstat (limited to 'coreutils/uuencode.c')
| -rw-r--r-- | coreutils/uuencode.c | 78 |
1 files changed, 23 insertions, 55 deletions
diff --git a/coreutils/uuencode.c b/coreutils/uuencode.c index 0a362a2..24b9f1c 100644 --- a/coreutils/uuencode.c +++ b/coreutils/uuencode.c @@ -28,7 +28,7 @@ #include "busybox.h" /* Conversion table. for base 64 */ -static char tbl_base64[64] = { +static char tbl_base64[65] = { 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', @@ -36,10 +36,11 @@ static char tbl_base64[64] = { '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', '+', '/' + '4', '5', '6', '7', '8', '9', '+', '/', + '=' /* termination character */ }; -static char tbl_std[64] = { +static char tbl_std[65] = { '`', '!', '"', '#', '$', '%', '&', '\'', '(', ')', '*', '+', ',', '-', '.', '/', '0', '1', '2', '3', '4', '5', '6', '7', @@ -47,7 +48,8 @@ static char tbl_std[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', '[', '\\', ']', '^', '_' + 'X', 'Y', 'Z', '[', '\\', ']', '^', '_', + '\`' /* termination character */ }; /* @@ -71,10 +73,10 @@ static void uuencode (const char *s, const char *store, const int length, const } /* Pad the result if necessary... */ if (i == length + 1) { - *(p - 1) = '='; + *(p - 1) = tbl[64]; } else if (i == length + 2) { - *(p - 1) = *(p - 2) = '='; + *(p - 1) = *(p - 2) = tbl[64]; } /* ...and zero-terminate it. */ *p = '\0'; @@ -82,8 +84,9 @@ static void uuencode (const char *s, const char *store, const int length, const int uuencode_main(int argc, char **argv) { - const int src_buf_size = 60; // This *MUST* be a multiple of 3 + const int src_buf_size = 45;// This *MUST* be a multiple of 3 const int dst_buf_size = 4 * ((src_buf_size + 2) / 3); + int write_size = dst_buf_size; RESERVE_CONFIG_BUFFER(src_buf, src_buf_size + 1); RESERVE_CONFIG_BUFFER(dst_buf, dst_buf_size + 1); struct stat stat_buf; @@ -92,10 +95,6 @@ int uuencode_main(int argc, char **argv) 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) { @@ -126,53 +125,22 @@ int uuencode_main(int argc, char **argv) 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) { + if (size != src_buf_size) { + /* write_size is always 60 until the last line */ + write_size=(4 * ((size + 2) / 3)); + /* pad with 0s so we can just encode extra bits */ + memset(&src_buf[size], 0, src_buf_size - size); + } /* 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); + putchar('\n'); + if (tbl == tbl_std) { + putchar(tbl[size]); + } + if (fwrite(dst_buf, 1, write_size, stdout) != write_size) { + perror("Couldnt finish writing"); + } } printf(tbl == tbl_std ? "\n`\nend\n" : "\n====\n"); |