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Because we only use XZ_DYNALLOC, there's a bunch of dead code.
This patch removes the #ifdef's and if()s associated with support for
multiple modes.
single_call was only used to store the mode; it is no longer needed.
A little bit of reorganization was needed to reduce the number of prototypes.
Documentation associated with dead code was dropped.
There are still some relics of multiple modes in the continued presence
of "XZ_DYNALLOC" and xz_mode.
Additionally, I inlined xz_dec_bcj_create; it was called once.
This loses about 125 lines, mostly comments.
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The functions involved were called only once.
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Move ftname out of GLOBALS into 'F' handler. Make 'i' zero pad output (zeroes
in middle of ID can get lost).
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lib: rename format_mode() to mode_to_string() (echoing string_to_mode), make it
take a normal char * argument.
stat: collapse big switch/case statements that only have one line each
into if/else staircase (much fewer lines of code). Remove return type
(other stat implementations print ? for unknown escapes, so do that here).
Inline do_stat() and do_statfs(). Set default string in normal local
variable "format". Remove unnecessary struct d. Restructure stat logic to
"if (flagf && !statfs()) else if (!flagf && !stat()) else perror_msg();"
Teach %N to add -> symlink. Judicious use of putchar() instead of xputc to
let FILE * do its job collating output.
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Put global stat info in a union so we don't have to malloc it and thus don't need an explicit size tracked in main(). Make date_stat_format() take a timespec and take advantage of stat having an embedded timespec (nanosecond printing), typecast the long long prints for XYZ because on some 32 bit platforms it's an int.
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From the mailing list:
Ok, first thing: clean up the help text. I realize what's there is copied verbatim from the man page, but that man page sucks. ("modification time" vs "change time"?) Took a bit of finagling to fit it in 80x24, but just made it.
GLOBALS() indent was still tab, change to two spaces. And I tend to put a blank line between options lib/args.c automatically fills out and normal globals.
We never do anything with date_stat_format() but immediately print it, might as well make the function do it.
The types[] array in do_stat() is a rough edge. Hmmm... there's no else case that sets the type in case it was unknown (such as 0). In theory, this never happens. In practice it means I can cheat slightly, given this observation:
$ find linux -name stat.h | xargs grep 'S_IF[A-Z]*[ \t]'
linux/include/uapi/linux/stat.h:#define S_IFMT 00170000
linux/include/uapi/linux/stat.h:#define S_IFSOCK 0140000
linux/include/uapi/linux/stat.h:#define S_IFLNK 0120000
linux/include/uapi/linux/stat.h:#define S_IFREG 0100000
linux/include/uapi/linux/stat.h:#define S_IFBLK 0060000
linux/include/uapi/linux/stat.h:#define S_IFDIR 0040000
linux/include/uapi/linux/stat.h:#define S_IFCHR 0020000
linux/include/uapi/linux/stat.h:#define S_IFIFO 0010000
I.E. the only place the I_IFBLAH constants occur a stat.h header in current linux code is in the generic stuff, it doesn't vary per target. (The access permission bits are actually subtly standardized in posix due to the command line arguments to chmod, although I'm sure cygwin finds a way to break. But the type fields, not so much. But linux has to be binary compatible with itself foreverish, and that's all I really care about.)
So, we have ALMOST have this going by twos, except there's no 8 and there is a 1. so let's make the 1 the default, feed a blank string into the 8... No, duh: octal. So it's actually 2, 4, 6, 8, 10, 12. So make the loop look like:
filetype = statf->st_mode & S_IFMT;
TT.ftname = types;
for (i = 1; filetype != (i*8192) && i < 7; i++)
TT.ftname += strlen(TT.ftname)+1;
Yes that's linux-specific, and I think I'm ok with that.
Printing all zeroes and pretending that's nanosecond resolution... either support it or don't. Let's see, supporting it is stat->st_atim.tv_nsec and similar... no mention of nanoseconds in strftime() (et tu, posix2008?) so pass it as a second argument and append it by hand... (Need to test that against musl...)
When we hit an unknown type in print_it() we print the literal character, which is right for %% but what about an unknown option?
$ stat -c %q /
?
Eh, I guess that's a "don't care". It didn't die with an error, that's the important thing.
I have a horrible idea for compressing the switch/case blocks, but should probably check this in and get some sleep for right now...
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set_hw_address().
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and move xsocket() to it.
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main at end).
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everywhere. It does not compile OOB on musl, so I changed it to the portable equivalent, char *. This compiles on musl, and should compile anywhere.
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-drop __always_inline (c. 1.5k of binary size),
-remove the xz_dec_bcj_end and memzero macros
(memeq is left because of negative returns),
-disable XZ_DEC_SINGLE and XZ_DEC_PREALLOC, since we aren't using them.
(160 bytes)
-Merge xz_dec_lzma2_end into xz_dec_end
-Move xz_crc32 to where it's defined.
(That does not seem to be duplicated elsewhere in toybox.)
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Actually, it's not quite the same:
-use crc_init(xz_crc32_table,1) -- I guessed on this one based on a match between magic constants, then tested it. First try was wrong, but this works.
(This is the sole difference in terms of actual _code_, as opposed to cleaning up defines and the like--here, it adds 48 bytes to final size if xzcat is the only toy, but drops 32 bytes if bzcat is also enabled...)
-Move some crc64 code to where the comments are. This puts them near the area where they're used.
-Remove some relics of separate files (we had half a dozen "this file is in the public domain" notices, a duplicate include, and used extern declarations for functions in the samefile)
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- Remove unnecessary headers
- dump_node is not used anywhere
- exec_buf is unused
- Replace SUCCESS with 1 and simplify code accordingly
- a==0 -> !a
- Simplify an incremation pattern using pre-increments
- Add static keyword to functions
- Make error messages print to stderr
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