uuencode: shrink

[oweals/busybox.git] / coreutils / uuencode.c

diff --git a/coreutils/uuencode.c b/coreutils/uuencode.c
index b54e317a2744efd11d5b163698fe89080bf878ff..c1458f7fb7c5bbdd24ac70a1436f8073c5de7204 100644 (file)
--- a/coreutils/uuencode.c
+++ b/coreutils/uuencode.c
@@ -10,64 +10,52 @@
 
 #include "libbb.h"
 
+enum {
+       SRC_BUF_SIZE = 45,  /* This *MUST* be a multiple of 3 */
+       DST_BUF_SIZE = 4 * ((SRC_BUF_SIZE + 2) / 3),
+};
 
-#define SRC_BUF_SIZE   45  // This *MUST* be a multiple of 3
-#define DST_BUF_SIZE    4 * ((SRC_BUF_SIZE + 2) / 3)
 int uuencode_main(int argc, char **argv);
 int uuencode_main(int argc, char **argv)
 {
-       const size_t src_buf_size = SRC_BUF_SIZE;
-       const size_t dst_buf_size = DST_BUF_SIZE;
-       size_t write_size = dst_buf_size;
        struct stat stat_buf;
-       FILE *src_stream = stdin;
+       int src_fd = STDIN_FILENO;
        const char *tbl;
-       size_t size;
        mode_t mode;
-       RESERVE_CONFIG_BUFFER(src_buf, SRC_BUF_SIZE + 1);
-       RESERVE_CONFIG_BUFFER(dst_buf, DST_BUF_SIZE + 1);
+       char src_buf[SRC_BUF_SIZE];
+       char dst_buf[DST_BUF_SIZE + 1];
 
        tbl = bb_uuenc_tbl_std;
+       mode = 0666 & ~umask(0666);
+       opt_complementary = "-1:?2"; /* must have 1 or 2 args */
        if (getopt32(argc, argv, "m")) {
                tbl = bb_uuenc_tbl_base64;
        }
-
-       switch (argc - optind) {
-               case 2:
-                       src_stream = xfopen(argv[optind], "r");
-                       xstat(argv[optind], &stat_buf);
-                       mode = stat_buf.st_mode & (S_IRWXU | S_IRWXG | S_IRWXO);
-                       break;
-               case 1:
-                       mode = 0666 & ~umask(0666);
-                       break;
-               default:
-                       bb_show_usage();
+       argv += optind;
+       if (argc == optind + 2) {
+               src_fd = xopen(*argv, O_RDONLY);
+               fstat(src_fd, &stat_buf);
+               mode = stat_buf.st_mode & (S_IRWXU | S_IRWXG | S_IRWXO);
+               argv++;
        }
 
-       printf("begin%s %o %s", tbl == bb_uuenc_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);
-               }
+       printf("begin%s %o %s", tbl == bb_uuenc_tbl_std ? "" : "-base64", mode, *argv);
+       while (1) {
+               size_t size = full_read(src_fd, src_buf, SRC_BUF_SIZE);
+               if (!size)
+                       break;
+               if ((ssize_t)size < 0)
+                       bb_perror_msg_and_die(bb_msg_read_error);
                /* Encode the buffer we just read in */
-               bb_uuencode((unsigned char*)src_buf, dst_buf, size, tbl);
-
+               bb_uuencode(dst_buf, src_buf, size, tbl);
                putchar('\n');
                if (tbl == bb_uuenc_tbl_std) {
                        putchar(tbl[size]);
                }
-               if (fwrite(dst_buf, 1, write_size, stdout) != write_size) {
-                       bb_perror_msg_and_die(bb_msg_write_error);
-               }
+               fflush(stdout);
+               xwrite(STDOUT_FILENO, dst_buf, 4 * ((size + 2) / 3));
        }
        printf(tbl == bb_uuenc_tbl_std ? "\n`\nend\n" : "\n====\n");
 
-       die_if_ferror(src_stream, "source");    /* TODO - Fix this! */
-
        fflush_stdout_and_exit(EXIT_SUCCESS);
 }