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2021-12-25sed: do not ignore 'g' modifier when match starts with ^Dominique Martinet
It is perfectly valid to start a regex with ^ and have other patterns with \| that can match more than once, e.g. the following example should print ca, as illustrated with gnu sed: $ echo 'abca' | sed -e 's/^a\|b//g' ca busybox before patch: $ echo 'abca' | busybox sed -e 's/^a\|b//g' bca busybox after patch: $ echo 'abca' | ./busybox sed -e 's/^a\|b//g' ca regcomp handles ^ perfectly well as illustrated with the second 'a' that did not match in the example, we ca leave the non-repeating to it if appropriate. The check had been added before using regcomp and was required at the time (f36635cec6da) but no longer makes sense now. (tested with glibc and musl libc) function old new delta add_cmd 1189 1176 -13 Signed-off-by: Dominique Martinet <asmadeus@codewreck.org> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2021-12-19ed: align output of read command with POSIX.1-2008Sören Tempel
POSIX.1-2008 mandates the following regarding the read command: If the read is successful, and -s was not specified, the number of bytes read shall be written to standard output in the following format: "%d\n", <number of bytes read> This commit aligns the output of busybox ed with POSIX.1-2008 by removing the file name from the output for the read command. This slipped through in 4836a0708fd0aaeb82871a3762b40fcf4b61e812. function old new delta .rodata 104203 104196 -7 readLines 409 388 -21 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 0/2 up/down: 0/-28) Total: -28 bytes Signed-off-by: Sören Tempel <soeren+git@soeren-tempel.net> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2021-12-19ed: fix current line number for file passed via the command-lineSören Tempel
POSIX.1-2008 mandates the following regarding the file command-line argument: If the file argument is given, ed shall simulate an e command on the file named by the pathname […] The specification for the e command mandates the following behaviour regarding the current line number in POSIX.1-2008: The current line number shall be set to the address of the last line of the buffer. However, without this commit, busybox ed will set the current line number to 1 if a file is given on the command-line and this file is not empty (lastNum != 0). This is incorrect and fixed in this commit by not modifying the current line number in ed_main(). As such, the current line number will be zero for empty files and otherwise be set to the address of the last line of the buffer. function old new delta ed_main 144 128 -16 Signed-off-by: Sören Tempel <soeren+git@soeren-tempel.net> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2021-12-17cmp: code shrinkDenys Vlasenko
function old new delta .rodata 104203 104201 -2 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2021-12-17ed: add support for -p command-line option as mandated by POSIXSören Tempel
The POSIX.1-2008 specification of ed(1) mandates two command-line options: -p (for specifying a prompt string) and -s (to suppress writing of byte counts). This commit adds support for the former. Furthermore, it also changes the default prompt string to an empty string (instead of ": ") since this is also mandated by POSIX: -p string Use string as the prompt string when in command mode. By default, there shall be no prompt string. function old new delta ed_main 112 144 +32 packed_usage 34074 34097 +23 doCommands 1889 1887 -2 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 2/1 up/down: 55/-2) Total: 53 bytes Signed-off-by: Sören Tempel <soeren+git@soeren-tempel.net> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2021-12-17cmp: add support for -nWalter Lozano
Add support to for "-n" to cmp in order to compare at most n bytes. function old new delta cmp_main 552 589 +37 .rodata 104198 104203 +5 packed_usage 34102 34074 -28 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 2/1 up/down: 42/-28) Total: 14 bytes Signed-off-by: Walter Lozano <walter.lozano@collabora.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2021-10-12ed: align output of read/write commands with POSIX-1.2008Sören Tempel
POSIX.1-2008 mandates the following regarding the write command: If the command is successful, the number of bytes written shall be written to standard output, unless the -s option was specified, in the following format: "%d\n", <number of bytes written> function old new delta readLines 447 409 -38 doCommands 1940 1889 -51 .rodata 104219 104163 -56 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 0/3 up/down: 0/-145) Total: -145 bytes Signed-off-by: Sören Tempel <soeren+git@soeren-tempel.net> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2021-09-09awk: never return NULL from awk_printf()Denys Vlasenko
function old new delta awk_printf 651 628 -23 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2021-09-09awk: code shrinkDenys Vlasenko
function old new delta awk_printf 652 651 -1 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2021-09-09awk: code shrink: avoid duplicate NUL checks and strlen()Denys Vlasenko
function old new delta awk_printf 665 652 -13 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2021-09-09awk: fix read beyond end of bufferRon Yorston
Commit 7d06d6e18 (awk: fix printf %%) can cause awk printf to read beyond the end of a strduped buffer: 2349 while (*f && *f != '%') 2350 f++; 2351 c = *++f; If the loop terminates because a NUL character is detected the character after the NUL is read. This can result in failures depending on the value of that character. function old new delta awk_printf 672 665 -7 Signed-off-by: Ron Yorston <rmy@pobox.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2021-09-05awk: fix printf %%Daniel Thau
A refactor of the awk printf code in e2e3802987266c98df0efdf40ad5da4b07df0113 appears to have broken the printf interpretation of two percent signs, which normally outputs only one percent sign. The patch below brings busybox awk printf behavior back into alignment with the pre-e2e380 behavior, the busybox printf util, and other common (awk and non-awk) printf implementations. function old new delta awk_printf 626 672 +46 Signed-off-by: Daniel Thau <danthau at bedrocklinux.org> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2021-08-29vi: further changes to colon addressesRon Yorston
Improved error messages: - specify when a search fails or a mark isn't set; - warn when line addresses are out of range or when a range of lines is reversed. Addresses are limited to the number of lines in the file so a command like ':2000000000' (go to the two billionth line) no longer causes a long pause. Improved vi compatibility of '+' and '-' operators that aren't followed immediately by a number: :4+++= 7 :3-2= 1 :3 - 2= 4 (yes, really!) In a command like ':,$' the empty address before the separator now correctly refers to the current line. (The similar case ':1,' was already being handled.) And all with a tidy reduction in bloat (32-bit build): function old new delta colon 4029 4069 +40 .rodata 99348 99253 -95 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 1/1 up/down: 40/-95) Total: -55 bytes Signed-off-by: Ron Yorston <rmy@pobox.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2021-08-22vi: code shrink print_literal()Ron Yorston
Simplify the function print_literal() which is used to format a string that may contain unprintable characters or control characters. - Unprintable characters were being displayed in normal text rather than the bold used for the rest of the message. This doesn't seem particularly helpful and it upsets the calculation of the width of the message in show_status_line(). Use '?' rather than '.' for unprintable characters. - Newlines in the string were displayed as both '^J' and '$', which is somewhat redundant. function old new delta not_implemented 199 108 -91 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 0/1 up/down: 0/-91) Total: -91 bytes Signed-off-by: Ron Yorston <rmy@pobox.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2021-08-22vi: searches in colon commands should wrapRon Yorston
The '/' and '?' search commands wrap to the other end of the buffer if the search target isn't found. When searches are used to specify addresses in colon commands they should do the same. (In traditional vi and vim this behaviour is controlled by the 'wrapscan' option. BusyBox vi doesn't have this option and always uses the default behaviour.) function old new delta colon 4033 4077 +44 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 1/0 up/down: 44/0) Total: 44 bytes Signed-off-by: Ron Yorston <rmy@pobox.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2021-08-20vi: don't right shift empty linesRon Yorston
The right shift command ('>') shouldn't affect empty lines. function old new delta do_cmd 4860 4894 +34 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 1/0 up/down: 34/0) Total: 34 bytes Signed-off-by: Ron Yorston <rmy@pobox.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2021-08-20vi: support ~/.exrcRon Yorston
Run initialisation commands from ~/.exrc. As with EXINIT these commands are processed before the first file is loaded. Commands starting with double quotes are ignored. This is how comments are often included in .exrc. function old new delta vi_main 268 406 +138 colon 4033 4071 +38 .rodata 108411 108442 +31 packed_usage 34128 34118 -10 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 3/1 up/down: 207/-10) Total: 197 bytes Signed-off-by: Ron Yorston <rmy@pobox.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2021-08-20vi: changes to handling of -c and EXINITRon Yorston
Rewrite handling of command line arguments so any number of -c commands will be processed. Previously only two -c commands were allowed (or one if EXINIT was set). Process commands from EXINIT before the first file is read into memory, as specified by POSIX. function old new delta run_cmds - 77 +77 .rodata 108410 108411 +1 vi_main 305 268 -37 edit_file 816 764 -52 ------------------------------------------------------------------------------ (add/remove: 1/0 grow/shrink: 1/2 up/down: 78/-89) Total: -11 bytes Signed-off-by: Ron Yorston <rmy@pobox.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2021-08-16vi: fix compile-time error if !ENABLE_FEATURE_VI_SETOPTSDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2021-07-14awk: whitespace and debugging tweaksDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2021-07-14vi: remove redundant assignmentDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2021-07-14awk: disallow break/continue outside of loopsDenys Vlasenko
function old new delta .rodata 104139 104186 +47 chain_group 610 633 +23 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 2/0 up/down: 70/0) Total: 70 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2021-07-14awk: tighten parsing - disallow extra semicolonsDenys Vlasenko
'; BEGIN {...}' and 'BEGIN {...} ;; {...}' are not accepted by gawk function old new delta parse_program 332 353 +21 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2021-07-13vi: fix regex search compilation errorRon Yorston
Building with FEATURE_VI_REGEX_SEARCH enabled fails. Signed-off-by: Ron Yorston <rmy@pobox.com> Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
2021-07-13vi: somewhat more readable code, no logic changesDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2021-07-13vi: allow delimiter in ':s' to be escapedRon Yorston
When regular expressions are allowed in search commands it becomes possible to escape the delimiter in search/replace commands. For example, this command will replace '/abc' with '/abc/': :s/\/abc/\/abc\//g The code to split the command into 'find' and 'replace' strings should allow for this possibility. VI_REGEX_SEARCH isn't enabled by default. When it is: function old new delta strchr_backslash - 38 +38 colon 4378 4373 -5 ------------------------------------------------------------------------------ (add/remove: 1/0 grow/shrink: 0/1 up/down: 38/-5) Total: 33 bytes Signed-off-by: Ron Yorston <rmy@pobox.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2021-07-13vi: allow regular expressions in ':s' commandsDenys Vlasenko
BusyBox vi has never supported the use of regular expressions in search/replace (':s') commands. Implement this using GNU regex when VI_REGEX_SEARCH is enabled. The implementation: - uses basic regular expressions, to match those used in the search command; - only supports substitution of back references ('\0' - '\9') in the replacement string. Any other character following a backslash is treated as that literal character. VI_REGEX_SEARCH isn't enabled in the default build. In that case: function old new delta colon 4036 4033 -3 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 0/1 up/down: 0/-3) Total: -3 bytes When VI_REGEX_SEARCH is enabled: function old new delta colon 4036 4378 +342 .rodata 108207 108229 +22 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 2/0 up/down: 364/0) Total: 364 bytes v2: Rebase. Code shrink. Ensure empty replacement string is null terminated. Signed-off-by: Andrey Dobrovolsky <andrey.dobrovolsky.odessa@gmail.com> Signed-off-by: Ron Yorston <rmy@pobox.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2021-07-13vi: improve handling of anchored searchesRon Yorston
Suppose we search for a git conflict marker '<<<<<<< HEAD' using the command '/^<<<'. Using 'n' to go to the next match finds '<<<' on the current line, apparently ignoring the '^' anchor. Set a flag in the compiled regular expression to indicate that the start of the string should not be considered a beginning-of-line anchor. An exception has to be made when the search starts from the beginning of the file. Make a similar change for end-of-line anchors. This doesn't affect a default build with VI_REGEX_SEARCH disabled. When it's enabled: function old new delta char_search 247 285 +38 Signed-off-by: Ron Yorston <rmy@pobox.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2021-07-13vi: use basic regular expressions for searchRon Yorston
Both traditional vi and vim use basic regular expressions for search. Also, they don't allow matches to extend across line endings. Thus with the file: 123 234 the search '/2.*4$' should find the second '2', not the first. Make BusyBox vi do the same. Whether or not VI_REGEX_SEARCH is enabled: function old new delta ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 0/0 up/down: 0/0) Total: 0 bytes Signed-off-by: Andrey Dobrovolsky <andrey.dobrovolsky.odessa@gmail.com> Signed-off-by: Ron Yorston <rmy@pobox.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2021-07-13vi: allow 'gg' to specify a rangeRon Yorston
Commit 7b93e317c (vi: enable 'dG' command. Closes 11801) allowed 'G' to be used as a range specifier for change/yank/delete operations. Add similar support for 'gg'. This requires setting the 'cmd_error' flag if 'g' is followed by any character other than another 'g'. function old new delta do_cmd 4852 4860 +8 .rodata 108179 108180 +1 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 2/0 up/down: 9/0) Total: 9 bytes Signed-off-by: Ron Yorston <rmy@pobox.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2021-07-12awk: in parsing, remove superfluous NEWLINE check; optimize builtin arg ↵Denys Vlasenko
evaluation function old new delta exec_builtin 1149 1145 -4 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2021-07-12awk: fix printf "%-10c", 0Denys Vlasenko
function old new delta awk_printf 596 626 +30 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2021-07-11awk: fix corner case in awk_printfDenys Vlasenko
Example where it wasn't working: awk 'BEGIN { printf "qwe %s rty %c uio\n", "a", 0, "c" }' - the NUL printing in %c caused premature stop of printing. function old new delta awk_printf 593 596 +3 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2021-07-11awk: unbreak "cmd" | getlineDenys Vlasenko
function old new delta evaluate 3337 3343 +6 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2021-07-11awk: unbreak "printf('%c') can output NUL" testcaseDenys Vlasenko
function old new delta awk_printf 546 593 +47 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2021-07-11awk: undo TI_PRINT, it introduced a bug (print with any redirect acting as ↵Denys Vlasenko
printf) function old new delta evaluate 3329 3337 +8 Patch by Ron Yorston <rmy@pobox.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2021-07-11awk: rollback_token() + chain_group() == chain_until_rbrace()Denys Vlasenko
function old new delta parse_program 336 332 -4 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2021-07-04awk: fix printf buffer overflowDenys Vlasenko
function old new delta awk_printf 468 546 +78 fmt_num 239 247 +8 getvar_s 125 111 -14 evaluate 3343 3329 -14 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 2/2 up/down: 86/-28) Total: 58 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2021-07-03awk: simplify tests for operation classDenys Vlasenko
Usually, an operation class has only one possible value of "info" word. In this case, just compare the entire info word, do not bother to mask OPCLSMASK bits. (Example where this is not the case: OC_REPLACE for "<op>=") function old new delta mk_splitter 106 100 -6 chain_group 616 610 -6 nextarg 40 32 -8 exec_builtin 1157 1149 -8 as_regex 111 103 -8 awk_split 553 543 -10 parse_expr 948 936 -12 awk_getline 656 642 -14 evaluate 3387 3343 -44 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 0/9 up/down: 0/-116) Total: -116 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2021-07-03awk: restore strdup elision optimization in assignmentDenys Vlasenko
function old new delta evaluate 3339 3387 +48 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2021-07-03awk: match(): code shrinkDenys Vlasenko
function old new delta do_match - 165 +165 exec_builtin_match 202 - -202 ------------------------------------------------------------------------------ (add/remove: 1/1 grow/shrink: 0/0 up/down: 165/-202) Total: -37 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2021-07-03awk: rand(): 64-bit constants should be ULLDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2021-07-03awk: do not use a copy of g_progname for node->l.new_prognameDenys Vlasenko
We never destroy g_progname's, the strings still exist, no need to copy function old new delta chain_node 104 97 -7 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2021-07-03awk: support %F %a %A in printfDenys Vlasenko
function old new delta .rodata 104111 104120 +9 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2021-07-03awk: open-code TS_OPTERM, no logic changesDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2021-07-03awk: tighten rules in action parsingDenys Vlasenko
Disallow: BEGIN { action } - must start on the same line Disallow: func f() print "hello" - must be in {...} function old new delta chain_until_rbrace - 41 +41 parse_program 307 336 +29 chain_group 649 616 -33 ------------------------------------------------------------------------------ (add/remove: 1/0 grow/shrink: 1/1 up/down: 70/-33) Total: 37 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2021-07-03awk: rename GRPSTART/END to L/RBRACE, no code changesDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2021-07-02awk: move match() code out-of-lineDenys Vlasenko
function old new delta exec_builtin_match - 202 +202 exec_builtin 1434 1157 -277 ------------------------------------------------------------------------------ (add/remove: 1/0 grow/shrink: 0/1 up/down: 202/-277) Total: -75 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2021-07-02awk: use smaller regmatch_t arrays, they had 2 elements for no apparent reasonDenys Vlasenko
function old new delta exec_builtin 1479 1434 -45 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2021-07-02awk: fix detection of VAR=VAL argumentsDenys Vlasenko
1NAME=VAL is not it, neither is VA.R=VAL function old new delta next_input_file 216 214 -2 is_assignment 115 91 -24 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 0/2 up/down: 0/-26) Total: -26 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
generated by cgit v1.1 at 2024-12-25 18:33:10 +0000