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https://github.com/sheumann/hush.git
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od: code shrink
function old new delta exit_code - 1 +1 open_next_file 73 72 -1 limit_bytes_to_format 1 - -1 ioerror 1 - -1 flag_pseudo_start 1 - -1 flag_dump_strings 1 - -1 od_main 2275 2164 -111 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko
parent
5c10fa5c24
commit
3ef344be91
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@ -18,6 +18,11 @@
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/* Written by Jim Meyering. */
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/* Busyboxed by Denys Vlasenko, based on od.c from coreutils-5.2.1 */
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/* #include "libbb.h" - done in od.c */
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#define assert(a) ((void)0)
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//usage:#if ENABLE_DESKTOP
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//usage:#define od_trivial_usage
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//usage: "[-abcdfhilovxs] [-t TYPE] [-A RADIX] [-N SIZE] [-j SKIP] [-S MINSTR] [-w WIDTH] [FILE...]"
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@ -30,9 +35,39 @@
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//usage: "Print FILEs (or stdin) unambiguously, as octal bytes by default"
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//usage:#endif
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/* #include "libbb.h" - done in od.c */
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enum {
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OPT_A = 1 << 0,
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OPT_N = 1 << 1,
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OPT_a = 1 << 2,
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OPT_b = 1 << 3,
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OPT_c = 1 << 4,
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OPT_d = 1 << 5,
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OPT_f = 1 << 6,
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OPT_h = 1 << 7,
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OPT_i = 1 << 8,
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OPT_j = 1 << 9,
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OPT_l = 1 << 10,
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OPT_o = 1 << 11,
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OPT_t = 1 << 12,
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/* When zero and two or more consecutive blocks are equal, format
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only the first block and output an asterisk alone on the following
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line to indicate that identical blocks have been elided: */
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OPT_v = 1 << 13,
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OPT_x = 1 << 14,
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OPT_s = 1 << 15,
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OPT_S = 1 << 16,
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OPT_w = 1 << 17,
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OPT_traditional = (1 << 18) * ENABLE_LONG_OPTS,
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};
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#define OD_GETOPT32() getopt32(argv, \
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"A:N:abcdfhij:lot:vxsS:w::", \
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/* -w with optional param */ \
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/* -S was -s and also had optional parameter */ \
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/* but in coreutils 6.3 it was renamed and now has */ \
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/* _mandatory_ parameter */ \
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&str_A, &str_N, &str_j, &lst_t, &str_S, &bytes_per_block)
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#define assert(a) ((void)0)
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/* Check for 0x7f is a coreutils 6.3 addition */
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#define ISPRINT(c) (((c)>=' ') && (c) != 0x7f)
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@ -139,15 +174,7 @@ struct ERR_width_bytes_has_bad_size {
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char ERR_width_bytes_has_bad_size[ARRAY_SIZE(width_bytes) == N_SIZE_SPECS ? 1 : -1];
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};
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static smallint flag_dump_strings;
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/* Non-zero if an old-style 'pseudo-address' was specified. */
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static smallint flag_pseudo_start;
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static smallint limit_bytes_to_format;
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/* When zero and two or more consecutive blocks are equal, format
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only the first block and output an asterisk alone on the following
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line to indicate that identical blocks have been elided. */
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static smallint verbose;
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static smallint ioerror;
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static smallint exit_code;
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static size_t string_min;
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@ -160,7 +187,11 @@ static struct tspec *spec;
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static void (*format_address)(off_t, char);
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/* The difference between the old-style pseudo starting address and
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the number of bytes to skip. */
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#if ENABLE_LONG_OPTS
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static off_t pseudo_offset;
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#else
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enum { pseudo_offset = 0 };
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#endif
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/* When zero, MAX_BYTES_TO_FORMAT and END_OFFSET are ignored, and all
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input is formatted. */
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@ -453,10 +484,10 @@ open_next_file(void)
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if (in_stream) {
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break;
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}
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ioerror = 1;
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exit_code = 1;
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}
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if (limit_bytes_to_format && !flag_dump_strings)
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if ((option_mask32 & (OPT_N|OPT_S)) == OPT_N)
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setbuf(in_stream, NULL);
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}
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@ -476,7 +507,7 @@ check_and_close(void)
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? bb_msg_standard_input
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: file_list[-1]
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);
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ioerror = 1;
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exit_code = 1;
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}
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fclose_if_not_stdin(in_stream);
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in_stream = NULL;
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@ -484,7 +515,7 @@ check_and_close(void)
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if (ferror(stdout)) {
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bb_error_msg(bb_msg_write_error);
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ioerror = 1;
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exit_code = 1;
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}
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}
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@ -762,7 +793,7 @@ skip(off_t n_skip)
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/* take "check & close / open_next" route */
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} else {
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if (fseeko(in_stream, n_skip, SEEK_CUR) != 0)
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ioerror = 1;
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exit_code = 1;
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return;
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}
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} else {
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@ -863,7 +894,8 @@ write_block(off_t current_offset, size_t n_bytes,
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static char prev_pair_equal = 0;
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size_t i;
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if (!verbose && !first
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if (!(option_mask32 & OPT_v)
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&& !first
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&& n_bytes == bytes_per_block
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&& memcmp(prev_block, curr_block, bytes_per_block) == 0
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) {
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@ -956,7 +988,7 @@ dump(off_t current_offset, off_t end_offset)
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block[1] = block[0] + bytes_per_block;
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idx = 0;
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if (limit_bytes_to_format) {
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if (option_mask32 & OPT_N) {
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while (1) {
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size_t n_needed;
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if (current_offset >= end_offset) {
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@ -1005,7 +1037,7 @@ dump(off_t current_offset, off_t end_offset)
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format_address(current_offset, '\n');
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if (limit_bytes_to_format && current_offset >= end_offset)
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if ((option_mask32 & OPT_N) && current_offset >= end_offset)
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check_and_close();
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free(block[0]);
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@ -1066,10 +1098,10 @@ dump_strings(off_t address, off_t end_offset)
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/* See if the next 'string_min' chars are all printing chars. */
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tryline:
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if (limit_bytes_to_format && (end_offset - string_min <= address))
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if ((option_mask32 & OPT_N) && (end_offset - string_min <= address))
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break;
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i = 0;
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while (!limit_bytes_to_format || address < end_offset) {
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while (!(option_mask32 & OPT_N) || address < end_offset) {
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if (i == bufsize) {
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bufsize += bufsize/8;
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buf = xrealloc(buf, bufsize);
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@ -1163,27 +1195,6 @@ int od_main(int argc UNUSED_PARAM, char **argv)
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{ "m", 1024*1024 },
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{ "", 0 }
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};
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enum {
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OPT_A = 1 << 0,
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OPT_N = 1 << 1,
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OPT_a = 1 << 2,
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OPT_b = 1 << 3,
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OPT_c = 1 << 4,
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OPT_d = 1 << 5,
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OPT_f = 1 << 6,
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OPT_h = 1 << 7,
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OPT_i = 1 << 8,
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OPT_j = 1 << 9,
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OPT_l = 1 << 10,
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OPT_o = 1 << 11,
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OPT_t = 1 << 12,
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OPT_v = 1 << 13,
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OPT_x = 1 << 14,
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OPT_s = 1 << 15,
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OPT_S = 1 << 16,
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OPT_w = 1 << 17,
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OPT_traditional = (1 << 18) * ENABLE_LONG_OPTS,
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};
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#if ENABLE_LONG_OPTS
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static const char od_longopts[] ALIGN1 =
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"skip-bytes\0" Required_argument "j"
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@ -1200,9 +1211,6 @@ int od_main(int argc UNUSED_PARAM, char **argv)
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llist_t *lst_t = NULL;
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unsigned opt;
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int l_c_m;
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/* The old-style 'pseudo starting address' to be printed in parentheses
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after any true address. */
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off_t pseudo_start = pseudo_start; // for gcc
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/* The number of input bytes to skip before formatting and writing. */
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off_t n_bytes_to_skip = 0;
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/* The offset of the first byte after the last byte to be formatted. */
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@ -1214,19 +1222,13 @@ int od_main(int argc UNUSED_PARAM, char **argv)
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format_address = format_address_std;
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address_base_char = 'o';
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address_pad_len_char = '7';
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/* flag_dump_strings = 0; - already is */
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/* Parse command line */
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opt_complementary = "w+:t::"; /* -w N, -t is a list */
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#if ENABLE_LONG_OPTS
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applet_long_options = od_longopts;
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#endif
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opt = getopt32(argv, "A:N:abcdfhij:lot:vxsS:"
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"w::", // -w with optional param
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// -S was -s and also had optional parameter
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// but in coreutils 6.3 it was renamed and now has
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// _mandatory_ parameter
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&str_A, &str_N, &str_j, &lst_t, &str_S, &bytes_per_block);
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opt = OD_GETOPT32();
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argv += optind;
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if (opt & OPT_A) {
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static const char doxn[] ALIGN1 = "doxn";
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@ -1248,7 +1250,6 @@ int od_main(int argc UNUSED_PARAM, char **argv)
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address_pad_len_char = doxn_address_pad_len_char[pos];
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}
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if (opt & OPT_N) {
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limit_bytes_to_format = 1;
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max_bytes_to_format = xstrtooff_sfx(str_N, 0, bkm);
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}
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if (opt & OPT_a) decode_format_string("a");
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@ -1261,22 +1262,18 @@ int od_main(int argc UNUSED_PARAM, char **argv)
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if (opt & OPT_j) n_bytes_to_skip = xstrtooff_sfx(str_j, 0, bkm);
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if (opt & OPT_l) decode_format_string("d4");
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if (opt & OPT_o) decode_format_string("o2");
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//if (opt & OPT_t)...
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while (lst_t) {
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decode_format_string(llist_pop(&lst_t));
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}
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if (opt & OPT_v) verbose = 1;
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if (opt & OPT_x) decode_format_string("x2");
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if (opt & OPT_s) decode_format_string("d2");
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if (opt & OPT_S) {
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string_min = xstrtou_sfx(str_S, 0, bkm);
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flag_dump_strings = 1;
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}
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//if (opt & OPT_w)...
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//if (opt & OPT_traditional)...
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if (flag_dump_strings && n_specs > 0)
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bb_error_msg_and_die("no type may be specified when dumping strings");
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// Bloat:
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//if ((option_mask32 & OPT_S) && n_specs > 0)
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// bb_error_msg_and_die("no type may be specified when dumping strings");
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/* If the --traditional option is used, there may be from
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* 0 to 3 remaining command line arguments; handle each case
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@ -1289,9 +1286,10 @@ int od_main(int argc UNUSED_PARAM, char **argv)
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#if ENABLE_LONG_OPTS
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if (opt & OPT_traditional) {
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off_t o1, o2;
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if (argv[0]) {
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off_t pseudo_start = -1;
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off_t o1, o2;
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if (!argv[1]) { /* one arg */
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if (parse_old_offset(argv[0], &o1)) {
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/* od --traditional OFFSET */
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@ -1305,7 +1303,6 @@ int od_main(int argc UNUSED_PARAM, char **argv)
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) {
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/* od --traditional OFFSET LABEL */
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n_bytes_to_skip = o1;
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flag_pseudo_start = 1;
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pseudo_start = o2;
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argv += 2;
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} else if (parse_old_offset(argv[1], &o2)) {
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@ -1321,7 +1318,6 @@ int od_main(int argc UNUSED_PARAM, char **argv)
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) {
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/* od --traditional FILE OFFSET LABEL */
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n_bytes_to_skip = o1;
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flag_pseudo_start = 1;
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pseudo_start = o2;
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argv[1] = NULL;
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} else {
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@ -1330,21 +1326,23 @@ int od_main(int argc UNUSED_PARAM, char **argv)
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} else { /* >3 args */
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bb_error_msg_and_die("too many arguments");
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}
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if (pseudo_start >= 0) {
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if (format_address == format_address_none) {
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address_base_char = 'o';
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address_pad_len_char = '7';
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format_address = format_address_paren;
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} else {
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format_address = format_address_label;
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}
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pseudo_offset = pseudo_start - n_bytes_to_skip;
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}
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}
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/* else: od --traditional (without args) */
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if (flag_pseudo_start) {
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if (format_address == format_address_none) {
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address_base_char = 'o';
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address_pad_len_char = '7';
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format_address = format_address_paren;
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} else
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format_address = format_address_label;
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}
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}
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#endif
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if (limit_bytes_to_format) {
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if (option_mask32 & OPT_N) {
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end_offset = n_bytes_to_skip + max_bytes_to_format;
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if (end_offset < n_bytes_to_skip)
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bb_error_msg_and_die("SKIP + SIZE is too large");
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@ -1352,7 +1350,7 @@ int od_main(int argc UNUSED_PARAM, char **argv)
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if (n_specs == 0) {
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decode_format_string("o2");
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n_specs = 1;
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/*n_specs = 1; - done by decode_format_string */
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}
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/* If no files were listed on the command line,
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@ -1365,16 +1363,14 @@ int od_main(int argc UNUSED_PARAM, char **argv)
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file_list = (char const *const *) argv;
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}
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/* open the first input file */
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/* Open the first input file */
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open_next_file();
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/* skip over any unwanted header bytes */
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/* Skip over any unwanted header bytes */
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skip(n_bytes_to_skip);
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if (!in_stream)
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return EXIT_FAILURE;
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pseudo_offset = (flag_pseudo_start ? pseudo_start - n_bytes_to_skip : 0);
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/* Compute output block length. */
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/* Compute output block length */
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l_c_m = get_lcm();
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if (opt & OPT_w) { /* -w: width */
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@ -1396,7 +1392,7 @@ int od_main(int argc UNUSED_PARAM, char **argv)
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}
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#endif
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if (flag_dump_strings)
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if (option_mask32 & OPT_S)
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dump_strings(n_bytes_to_skip, end_offset);
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else
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dump(n_bytes_to_skip, end_offset);
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@ -1404,5 +1400,5 @@ int od_main(int argc UNUSED_PARAM, char **argv)
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if (fclose(stdin) == EOF)
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bb_perror_msg_and_die(bb_msg_standard_input);
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return ioerror;
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return exit_code;
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}
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