busybox-w32/editors/cmp.c, branch waitfor

cmp: add KMG suffix for cmp -n MAXCOUNT

2026-07-03T06:14:23+00:00

Change input to getopt32 from int to char * so that max_count is parsed as string. Use xatol_sfx to convert string to long. function old new delta cmp_main 595 631 +36 .rodata 107121 107120 -1 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 1/1 up/down: 36/-1) Total: 35 bytes Signed-off-by: Anubhav Kokane Signed-off-by: Denys Vlasenko

cmp: fix -n causing all diffs to be output, implement size suffixes for SKIP

2026-01-18T01:41:20+00:00

function old new delta packed_usage 35802 35828 +26 cmp_main 616 595 -21 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 1/1 up/down: 26/-21) Total: 5 bytes Signed-off-by: Denys Vlasenko

cmp: stop skipping bytes if EOF is reached

2026-01-18T00:41:19+00:00

Currently, if a skip value is larger than the file size, cmp will continue to loop and call getc() until the skip count is satisfied, even though EOF has been reached. For large skip values (e.g., 1 billion), this results in significant CPU waste and execution time (e.g., 11 seconds on a modern CPU). This patch checks for EOF inside the skip loop and breaks early. Test case: $ touch empty.txt $ time ./busybox cmp empty.txt empty.txt 1000000000 1000000000 Before: real 0m10.937s After: real 0m0.002s function old new delta cmp_main 594 616 +22 Signed-off-by: Giorgi Tchankvetadze Signed-off-by: Denys Vlasenko

Update applet size estimates

2023-07-10T15:25:21+00:00

Signed-off-by: Denys Vlasenko

Add support for long options to cmp

2022-01-23T19:24:32+00:00

In order to improve compatibility with GNU cmp add support for long options to busybox cmp. function old new delta static.cmp_longopts - 36 +36 cmp_main 589 594 +5 ------------------------------------------------------------------------------ (add/remove: 1/0 grow/shrink: 1/0 up/down: 41/0) Total: 41 bytes Signed-off-by: Walter Lozano Signed-off-by: Denys Vlasenko

cmp: code shrink

2021-12-17T21:43:45+00:00

function old new delta .rodata 104203 104201 -2 Signed-off-by: Denys Vlasenko

cmp: add support for -n

2021-12-17T21:07:06+00:00

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 Signed-off-by: Denys Vlasenko

*: --help tweaks

2021-06-14T18:47:20+00:00

function old new delta packed_usage 33589 33552 -37 Signed-off-by: Denys Vlasenko

config: update size information

2018-12-28T02:20:17+00:00

Signed-off-by: Denys Vlasenko

regularize format of source file headers, no code changes

2017-09-18T14:28:43+00:00

Signed-off-by: Denys Vlasenko